{"id":7437,"date":"2026-07-16T20:50:22","date_gmt":"2026-07-16T12:50:22","guid":{"rendered":"https:\/\/hobertek.com\/?page_id=7437"},"modified":"2026-07-29T16:43:57","modified_gmt":"2026-07-29T08:43:57","slug":"solar-pump-troubleshooting-checklist","status":"publish","type":"page","link":"https:\/\/hobertek.com\/es\/solar-pump-troubleshooting-checklist\/","title":{"rendered":"Lista de verificaci\u00f3n para la resoluci\u00f3n de problemas de bombas solares"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"7437\" class=\"elementor elementor-7437\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c049c7e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c049c7e\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-863c345\" data-id=\"863c345\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-fa8f80f elementor-widget elementor-widget-html\" data-id=\"fa8f80f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<!-- HOBER SUPPORT DIAGNOSTIC EMBED: paste this complete block into a Custom HTML section -->\n<section id=\"hober-support-diagnostic\" aria-labelledby=\"hsd-title\">\n  <style>\n    #hober-support-diagnostic { --hsd-navy:#153f78; 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}\n    #hober-support-diagnostic .hsd-contact { border:1px solid #b8cfce; background:#fff; color:var(--hsd-navy); }\n    #hober-support-diagnostic .hsd-copy-note { width:100%; color:var(--hsd-teal); font-size:13px; font-weight:800; }\n    @media (max-width:820px) { #hober-support-diagnostic .hsd-grid { grid-template-columns:1fr; } #hober-support-diagnostic .hsd-result { min-height:0; } }\n    @media (max-width:560px) { #hober-support-diagnostic .hsd-head { padding:26px 20px 20px; } #hober-support-diagnostic .hsd-grid { padding:0 14px 14px; } #hober-support-diagnostic .hsd-search, #hober-support-diagnostic .hsd-result { padding:20px; } }\n  <\/style>\n\n  <div class=\"hsd-shell\">\n    <div class=\"hsd-head\">\n      <p class=\"hsd-kicker\">Diagn\u00f3stico de autoservicio HOBER<\/p>\n      <h2 id=\"hsd-title\">Seleccione el c\u00f3digo de aver\u00eda o el s\u00edntoma de funcionamiento.<\/h2>\n      <p class=\"hsd-intro\">Seleccione una opci\u00f3n de la lista de soluci\u00f3n de problemas para obtener categor\u00edas preliminares de causas, comprobaciones de seguridad y la evidencia necesaria para la revisi\u00f3n t\u00e9cnica. Esta herramienta no determina la garant\u00eda, la elegibilidad para el reemplazo ni la responsabilidad.<\/p>\n    <\/div>\n    <div class=\"hsd-grid\">\n      <form class=\"hsd-search\" data-hsd-form action=\"\">\n        <div class=\"hsd-field\"><label for=\"hsd-product\">Categor\u00eda de producto<\/label><select id=\"hsd-product\" data-hsd-product><option value=\"inverter\">Inversor de bomba solar<\/option><option value=\"pump\">Bomba\/motor de agua<\/option><option value=\"system\">Sistema completo de bombeo solar<\/option><option value=\"bldc\">Bomba\/controlador solar BLDC<\/option><\/select><\/div>\n        <div class=\"hsd-field\" data-hsd-pump-field hidden><label for=\"hsd-pump-type\">Tipo de bomba<\/label><select id=\"hsd-pump-type\" data-hsd-pump-type><option value=\"deep-well\">Bomba sumergible para pozos profundos<\/option><option value=\"wq\">Bomba sumergible para aguas residuales WQ<\/option><option value=\"ld\">Bomba vertical en l\u00ednea LD<\/option><option value=\"nis\">Bomba de aspiraci\u00f3n final NIS\/NISO<\/option><option value=\"vertical-multistage\">Bomba vertical multietapa CDL \/ CDLF \/ CDM \/ CDMF<\/option><option value=\"nb\">Bomba vertical multietapa ligera NB<\/option><option value=\"nd\">Bomba ND: se requiere confirmaci\u00f3n del modelo.<\/option><option value=\"chm\">Bomba horizontal multietapa\/de refuerzo CHM<\/option><\/select><\/div>\n        <div class=\"hsd-field\"><label for=\"hsd-fault\">C\u00f3digo de aver\u00eda \/ s\u00edntoma de funcionamiento<\/label><select id=\"hsd-fault\" data-hsd-fault required><option value=\"\">Seleccione un c\u00f3digo de aver\u00eda o s\u00edntoma.<\/option><\/select><\/div>\n        <button class=\"hsd-submit\" type=\"submit\">Mostrar soluci\u00f3n \u2192<\/button>\n        <p class=\"hsd-coverage\">Los casos de inversor, bomba, sistema completo y BLDC se mantienen separados. Las fallas de la bomba se filtran adem\u00e1s seg\u00fan su construcci\u00f3n. Seleccione \u201cC\u00f3digo\/s\u00edntoma no listado\u201d cuando no haya ninguna opci\u00f3n adecuada disponible.<\/p>\n      <input type=\"hidden\" name=\"trp-form-language\" value=\"es\"\/><\/form>\n      <div class=\"hsd-result\" data-hsd-result aria-live=\"polite\"><div class=\"hsd-empty\"><div class=\"hsd-empty-mark\">?<\/div><h3>Seleccione un c\u00f3digo de aver\u00eda o s\u00edntoma.<\/h3><p>Aqu\u00ed se mostrar\u00e1n las causas estimadas y los pasos recomendados para su soluci\u00f3n.<\/p><\/div><\/div>\n    <\/div>\n  <\/div>\n\n  <script>\n  (function () {\n    var root = document.getElementById(\"hober-support-diagnostic\");\n    if (!root || root.dataset.ready === \"true\") return;\n    root.dataset.ready = \"true\";\n    var knowledge = [\n      {\n        products: [\"inverter\"], aliases: [\"E:O-C Acc spd\", \"OC acceleration\", \"over current at accelerate\"],\n        keywords: [\"over current\", \"overcurrent\", \"acceleration\", \"startup current\"],\n        tag: \"Confirmed inverter message\", title: \"Overcurrent during acceleration\",\n        causes: [\"Output cable, pump motor or grounding fault\", \"Acceleration is too fast or load increases suddenly\", \"Pump load and inverter capacity may not match\"],\n        steps: [\"Stop and isolate the system. Inspect U\/V\/W terminals and the pump cable for loose connections, damage or water ingress.\", \"Have a qualified electrician test motor\/cable resistance and insulation with the pump disconnected.\", \"After safe isolation, a qualified technician may perform the approved no-load test to separate the external circuit from the inverter.\", \"If the external circuit is healthy, have the model sizing and acceleration settings reviewed before restarting.\"],\n        evidence: [\"Exact inverter model and display photo\", \"Pump nameplate\", \"U\/V\/W wiring photos\", \"Resistance and insulation readings\", \"Startup video\"],\n        safety: \"Do not repeatedly restart. Stop immediately if the cable, motor or inverter shows heat, smell, smoke or insulation damage.\",\n        source: \"2026 Solar Pumping Inverter User Manual\"\n      },\n      {\n        products: [\"inverter\"], aliases: [\"AC OUT O-A\", \"AC output overcurrent\", \"output over amp\"],\n        keywords: [\"ac out o-a\", \"output overcurrent\", \"output over amp\", \"high output current\"],\n        tag: \"Confirmed troubleshooting file\", title: \"AC output overcurrent fault\",\n        causes: [\"Pump cable, waterproof joint or motor winding may be shorted, grounded or damaged\", \"Single-phase pump wiring may be incorrect\", \"Output phase, frequency or motor settings may not match the pump\", \"The pump may be blocked, overloaded or outside the suitable duty range\", \"If the fault remains with the pump disconnected, the inverter may require authorized service\"],\n        steps: [\"Stop the system safely and record the complete display, inverter model and pump nameplate.\", \"Have a qualified technician disconnect the pump and perform the approved no-load test. The inverter should remain in WORKING status with 0 A output current.\", \"Confirm inverter output phase and maximum frequency match the pump. Verify single-phase pump wiring against the approved wiring guide.\", \"With all power isolated, measure pump phase resistance and insulation, then inspect the extension cable and waterproof joints separately.\", \"Check for blocked hydraulics, closed valves, excessive head or abnormal mechanical load.\", \"If the fault occurs without load or unloaded output is abnormal, stop and contact HOBER.\"],\n        evidence: [\"Complete fault display photo\", \"Inverter model and serial label\", \"Pump nameplate\", \"Approved no-load video\", \"Output-current and phase-to-phase voltage readings\", \"Pump resistance and insulation readings\", \"U\/V\/W and waterproof-joint photos\"],\n        safety: \"Do not repeatedly restart, open the inverter, bypass overcurrent protection or run a pump with suspected cable\/motor damage.\",\n        source: \"AC OUT O-A Troubleshooting.pdf\"\n      },\n      {\n        products: [\"inverter\"], aliases: [\"AC OUT S-C\", \"output short circuit\", \"AC output short\"],\n        keywords: [\"ac out s-c\", \"output short\", \"short circuit\", \"motor short\"],\n        tag: \"Confirmed troubleshooting file\", title: \"AC output short-circuit fault\",\n        causes: [\"The pump cable, waterproof joint or motor winding may be shorted\", \"Single-phase pump wiring may be incorrect\", \"Output phase or frequency settings may not match the pump\", \"If the fault remains with the pump disconnected, the inverter output stage may require technical service\"],\n        steps: [\"Stop and isolate all power sources. Inspect U\/V\/W terminals, the extension cable and waterproof joints for damage, loose conductors or water ingress.\", \"Have a qualified technician disconnect the pump and perform the approved no-load test. If the fault remains without the pump, stop and contact HOBER.\", \"Confirm inverter output phase and maximum frequency match the pump nameplate; verify single-phase pump wiring against the approved wiring guide.\", \"With all power isolated, measure pump phase resistance and insulation. Separate the extension cable from the motor when tracing an open, zero or unbalanced reading.\", \"Repair the confirmed external short-circuit or cable\/motor fault before reconnecting the pump.\"],\n        evidence: [\"Complete fault display photo\", \"Inverter model and serial label\", \"Pump nameplate\", \"U\/V\/W and waterproof-joint photos\", \"Approved no-load result\", \"Pump resistance and insulation readings\"],\n        safety: \"Do not repeatedly restart, bypass short-circuit protection or energize a wet or damaged output cable.\",\n        source: \"AC OUT S-C Troubleshooting.pdf\"\n      },\n      {\n        products: [\"inverter\"], aliases: [\"E:O-C Dec spd\", \"OC deceleration\", \"over current at decelerate\"],\n        keywords: [\"over current\", \"overcurrent\", \"deceleration\", \"stopping current\"],\n        tag: \"Confirmed inverter message\", title: \"Overcurrent during deceleration\",\n        causes: [\"Output circuit short circuit or grounding fault\", \"Deceleration is too fast\", \"Sudden load change during deceleration\"],\n        steps: [\"Stop and isolate the system; inspect pump cable and U\/V\/W connections.\", \"Ask a qualified electrician to test cable and motor resistance and insulation.\", \"Record whether the code appears only while stopping.\", \"Request a parameter review before changing deceleration settings.\"],\n        evidence: [\"Model and exact code photo\", \"Pump nameplate\", \"Output wiring photos\", \"Insulation readings\", \"Stop-sequence video\"],\n        safety: \"Do not change multiple parameters or repeatedly restart before the output circuit is checked.\",\n        source: \"2026 Solar Pumping Inverter User Manual\"\n      },\n      {\n        products: [\"inverter\"], aliases: [\"E:O-C CnstSpd\", \"OC constant speed\", \"over current at constant speed\"],\n        keywords: [\"over current\", \"overcurrent\", \"constant speed\", \"running current\"],\n        tag: \"Confirmed inverter message\", title: \"Overcurrent at constant speed\",\n        causes: [\"Output cable, motor or grounding fault\", \"Sudden hydraulic or mechanical load increase\"],\n        steps: [\"Stop and inspect the pump cable, waterproof joint and U\/V\/W terminals.\", \"Check for blocked pipe, closed valve, jammed pump or abnormal mechanical resistance.\", \"Have a qualified electrician test motor\/cable resistance and insulation.\", \"Use the approved no-load test only after safe isolation to classify external versus inverter-side fault.\"],\n        evidence: [\"Model and code photo\", \"Pump nameplate\", \"Output current before trip\", \"Wiring and water-system photos\", \"Insulation readings\"],\n        safety: \"Do not continue running a stalled pump or bypass overcurrent protection.\",\n        source: \"2026 Solar Pumping Inverter User Manual\"\n      },\n      {\n        products: [\"inverter\"], aliases: [\"E:O-V Acc spd\", \"E:O-V Dec spd\", \"E:O-V Cnstspd\", \"over voltage\"],\n        keywords: [\"over voltage\", \"overvoltage\", \"voltage too high\", \"high pv voltage\"],\n        tag: \"Confirmed inverter message\", title: \"Inverter overvoltage\",\n        causes: [\"Input voltage is above the permitted range\", \"External force may be driving the motor\", \"Acceleration or deceleration setting may be unsuitable\"],\n        steps: [\"Stop the system and record the exact code stage: acceleration, deceleration or constant speed.\", \"Have a qualified electrician measure PV input voltage and confirm the series\/parallel configuration.\", \"Compare the measured voltage and panel Voc calculation with the input range in the exact model manual.\", \"Remove any unapproved external power or mechanical drive condition; request a parameter review if voltage is correct.\"],\n        evidence: [\"Exact model and code photo\", \"Panel label and quantity\", \"Series\/parallel diagram\", \"Measured PV voltage\", \"Pump and system description\"],\n        safety: \"Do not reconnect an array whose calculated or measured voltage exceeds the inverter input range.\",\n        source: \"2026 Solar Pumping Inverter User Manual\"\n      },\n      {\n        products: [\"inverter\"], aliases: [\"E: Low Voltage\", \"low voltage\", \"undervoltage\"],\n        keywords: [\"low voltage\", \"undervoltage\", \"voltage drops\", \"weak solar\"],\n        tag: \"Confirmed inverter message\", title: \"Solar input low voltage\",\n        causes: [\"PV input voltage is outside the normal range\", \"Incorrect string configuration, weak sunlight, shading or poor connection\", \"Voltage may collapse under load even when open-circuit voltage looks normal\"],\n        steps: [\"Record the panel label, panel quantity and exact series\/parallel configuration.\", \"Inspect polarity, DC breaker, fuses, connectors and cable condition.\", \"Measure PV voltage at the inverter input during startup under load.\", \"Compare the reading with the permitted input range in the exact inverter manual.\"],\n        evidence: [\"Inverter model\", \"Panel label and quantity\", \"PV wiring photo\", \"Open-circuit and startup voltage\", \"Startup video\"],\n        safety: \"Only qualified personnel should measure live DC voltage. Do not change PV string wiring while energized.\",\n        source: \"2026 Solar Pumping Inverter User Manual\"\n      },\n      {\n        products: [\"inverter\"], aliases: [\"E: Invt O-Ld\", \"inverter overload\"],\n        keywords: [\"inverter overload\", \"overload\", \"inverter too small\"],\n        tag: \"Confirmed inverter message\", title: \"Inverter overload\",\n        causes: [\"Pump load may exceed inverter capacity\", \"Motor or pump may be stalled\", \"Long or undersized cable may cause excessive loss\"],\n        steps: [\"Compare inverter rating with the pump nameplate; do not assume kW alone proves compatibility.\", \"Check the pump and water system for blockage, closed valve, jam or abnormal mechanical load.\", \"Check output cable length, cross-section, joints and voltage loss.\", \"Send the ratings and operating-current evidence for sizing review before replacing equipment.\"],\n        evidence: [\"Inverter and pump nameplates\", \"Output current and frequency\", \"Cable size and length\", \"Water-system photos\", \"Startup video\"],\n        safety: \"Do not bypass overload protection or continue running a stalled motor.\",\n        source: \"2026 Solar Pumping Inverter User Manual\"\n      },\n      {\n        products: [\"inverter\"], aliases: [\"E: Motor O-Ld\", \"motor overload\"],\n        keywords: [\"motor overload\", \"pump overload\", \"motor hot\"],\n        tag: \"Confirmed inverter message\", title: \"Motor overload\",\n        causes: [\"Motor protection data may not match the nameplate\", \"Pump or motor may be stalled or mechanically overloaded\", \"Inverter sizing or cable loss may be unsuitable\"],\n        steps: [\"Stop and check for blocked inlet, closed valve, sand, debris or abnormal pump noise.\", \"Compare pump nameplate current and voltage with the inverter setup and rating.\", \"Inspect cable size, length, waterproof joints and output terminals.\", \"Request a qualified parameter and sizing review; do not increase protection limits without approval.\"],\n        evidence: [\"Pump and inverter nameplates\", \"Operating current\/frequency\", \"Cable size and length\", \"Water source and pipe condition\", \"Startup video\"],\n        safety: \"Allow overheated equipment to cool and do not bypass motor protection.\",\n        source: \"2026 Solar Pumping Inverter User Manual\"\n      },\n      {\n        products: [\"inverter\"], aliases: [\"E: Input P-Lst\", \"input phase lost\", \"input phase loss\"],\n        keywords: [\"input phase\", \"ac phase loss\", \"phase missing input\"],\n        tag: \"Confirmed inverter message\", title: \"AC input phase loss\",\n        causes: [\"Three-phase AC input is missing, unstable or incorrectly connected\"],\n        steps: [\"Stop and isolate the AC input.\", \"Inspect input breakers, fuses, terminals and cable condition.\", \"Have a qualified electrician measure all three input phase voltages.\", \"Correct the upstream supply fault before restarting.\"],\n        evidence: [\"Model and code photo\", \"AC input wiring photo\", \"Three phase-to-phase voltage readings\", \"Breaker\/fuse condition\"],\n        safety: \"Live AC measurement must be performed by qualified electrical personnel only.\",\n        source: \"2026 Solar Pumping Inverter User Manual\"\n      },\n      {\n        products: [\"inverter\"], aliases: [\"E:Output P-Lst\", \"Phase Lost\", \"output phase lost\", \"output phase loss\"],\n        keywords: [\"output phase\", \"motor phase loss\", \"phase missing output\"],\n        tag: \"Confirmed inverter message\", title: \"AC output phase loss\",\n        causes: [\"U\/V\/W cable, waterproof joint or motor winding is abnormal\"],\n        steps: [\"Stop, isolate and inspect all U\/V\/W terminals and cable joints.\", \"Check for loose, broken, burned or water-damaged output connections.\", \"Have a qualified electrician measure phase-to-phase resistance balance, phase-to-ground insulation and three-phase operating-current balance.\", \"Escalate if wiring and motor readings are healthy or the fault remains under the approved no-load test. Protection must remain enabled.\"],\n        evidence: [\"Model and code photo\", \"U\/V\/W wiring photos\", \"Three phase-current readings\", \"Phase resistance readings\", \"Insulation reading\", \"Pump nameplate\"],\n        safety: \"Do not disable phase-loss protection, energize damaged or wet motor cable, or switch the output while the inverter is running.\",\n        source: \"2026 Solar Pumping Inverter User Manual; Phase Lost Troubleshooting.pdf\"\n      },\n      {\n        products: [\"inverter\"], aliases: [\"E: Invt O-Temp\", \"inverter over temperature\", \"inverter overheating\"],\n        keywords: [\"over temperature\", \"overheat\", \"too hot\", \"temperature fault\", \"fan not working\"],\n        tag: \"Confirmed inverter message\", title: \"Inverter overtemperature\",\n        causes: [\"Ambient temperature is too high\", \"Cooling fan is not operating\", \"Air duct is blocked or enclosure ventilation is poor\"],\n        steps: [\"Stop the system and allow the inverter to cool.\", \"Inspect the installation for direct sun, blocked air path, dust, inadequate clearance and a poorly ventilated outdoor cabinet.\", \"Provide a sun shield while maintaining at least 15 cm clear ventilation space above the inverter.\", \"Confirm whether all cooling fans operate when the displayed temperature is high; do not open the inverter enclosure.\", \"Improve cabinet airflow according to the installation manual, then retest while monitoring temperature. Escalate a failed fan for authorized service.\"],\n        evidence: [\"Model and code photo\", \"Full installation\/cabinet photos\", \"Ambient temperature\", \"Fan operation video\", \"Time from startup to fault\"],\n        safety: \"Do not touch hot surfaces or open the inverter. Escalate if there is smell, discoloration or repeated overheating.\",\n        source: \"2026 Solar Pumping Inverter User Manual; Over-temperature Troubleshooting.pdf\"\n      },\n      {\n        products: [\"inverter\"], aliases: [\"E: Buffer Res\", \"E:Buffer Res\", \"buffer resistor\", \"charger resistance issue\"],\n        keywords: [\"buffer res\", \"charging resistor\", \"charger resistance\"],\n        tag: \"Internal fault - escalate\", title: \"Charging circuit \/ buffer resistor fault\",\n        causes: [\"The manual identifies a capacitor charging or charging-resistor circuit failure\"],\n        steps: [\"Stop the inverter and isolate power safely.\", \"Photograph the exact display and inverter label.\", \"Record whether the fault appears immediately at power-on.\", \"Contact HOBER support; do not open the enclosure or attempt board-level repair.\"],\n        evidence: [\"Model and serial label\", \"Fault display photo\", \"Power-on video\", \"Input voltage\", \"Installation history\"],\n        safety: \"Internal charging circuits retain hazardous energy. Customer-level repair is not permitted.\",\n        source: \"2026 Solar Pumping Inverter User Manual\"\n      },\n      {\n        products: [\"inverter\"], aliases: [\"E:Current Sens\", \"E: Current Sens\", \"current sensor issue\"],\n        keywords: [\"current sens\", \"current sensor\"],\n        tag: \"Internal fault - escalate\", title: \"Current sensor fault\",\n        causes: [\"The inverter has detected an abnormal internal current-sensing circuit\"],\n        steps: [\"Stop the inverter and isolate power safely.\", \"Photograph the exact display and inverter label.\", \"Record whether the fault remains with the pump safely disconnected by a qualified technician.\", \"Contact HOBER support; do not open the enclosure.\"],\n        evidence: [\"Model and serial label\", \"Fault display photo\", \"Power-on video\", \"Approved no-load result when available\"],\n        safety: \"Do not use the inverter when current feedback may be unreliable.\",\n        source: \"2026 Solar Pumping Inverter User Manual; Current sensor replacement method.pdf (authorized service reference only)\"\n      },\n      {\n        products: [\"inverter\"], aliases: [\"E:E2prom\", \"E: E2prom\", \"E2prom\", \"EEPROM issue\"],\n        keywords: [\"e2prom\", \"eeprom\", \"memory fault\"],\n        tag: \"Internal fault - escalate\", title: \"Inverter memory fault\",\n        causes: [\"The manual identifies an internal memory-chip or main-control issue\"],\n        steps: [\"Stop the inverter and isolate power safely.\", \"Photograph the exact display and inverter label.\", \"Record whether the code returns after one safe power cycle.\", \"Contact HOBER support; do not reset parameters repeatedly or attempt board-level repair.\"],\n        evidence: [\"Model and serial label\", \"Fault display photo\", \"Power-cycle video\", \"Recent parameter or service history\"],\n        safety: \"Do not rely on stored settings when an internal memory fault is active.\",\n        source: \"2026 Solar Pumping Inverter User Manual\"\n      },\n      {\n        products: [\"inverter\"], aliases: [\"OFF IGBT O-A\", \"IGBT O-A\", \"IGBT OA\", \"IGBT 0-A\", \"IGBT 0A\", \"OFF IGBT OA\"],\n        keywords: [\"igbt o-a\", \"igbt oa\", \"igbt 0-a\", \"igbt 0a\", \"off igbt\"],\n        tag: \"Confirmed troubleshooting file\", title: \"OFF \/ IGBT O-A fault\",\n        causes: [\"The pump cable or motor may have abnormal resistance, insulation or a short circuit\", \"Inverter output phase\/frequency settings may not match the pump\", \"Single-phase pump wiring may be incorrect\", \"If the fault remains with the pump disconnected, the inverter output stage may require technical service\"],\n        steps: [\"Stop the system safely. Record the complete display, inverter model and pump nameplate before changing anything.\", \"Have a qualified technician disconnect the pump and perform the approved no-load test for 5-10 minutes. Confirm the inverter remains in WORKING status and output current is 0 A.\", \"The qualified technician should measure unloaded phase-to-phase output voltage and compare it with the inverter voltage class. If output is abnormal, stop and contact HOBER.\", \"Confirm inverter output phase and maximum frequency match the pump nameplate. For a single-phase pump, verify wiring against the approved single-phase pump wiring guide.\", \"With all power isolated, measure pump phase resistance and insulation. For a three-phase pump, phase resistances should be balanced; inspect the extension cable separately if readings are open or zero.\", \"If the inverter is normal without load but the fault returns with the pump, focus on pump cable, waterproof joints, motor condition and load. If it faults without load, escalate to HOBER.\"],\n        evidence: [\"Complete fault display photo\", \"Inverter model and serial label\", \"Pump nameplate\", \"Approved no-load video and output-current screen\", \"UV\/UW\/VW output-voltage readings\", \"Pump resistance and insulation readings\", \"U\/V\/W wiring and waterproof-joint photos\"],\n        safety: \"No-load testing and live output-voltage measurement must be performed only by qualified electrical personnel. Do not open the inverter or repeatedly run a pump with suspected cable\/motor damage.\",\n        source: \"OFF _IGBT O-A _ troubleshooting.pdf; IGBT Module Testing.pdf (authorized service reference only)\"\n      },\n      {\n        products: [\"inverter\"], aliases: [\"IC VOLTAGE\", \"IC voltage fault\", \"IC voltage alarm\"],\n        keywords: [\"ic voltage\", \"internal voltage\", \"control voltage\"],\n        tag: \"Internal fault - escalate\", title: \"IC VOLTAGE fault\",\n        causes: [\"An external sensor, communication module or pump connection may be pulling down the control supply\", \"The inverter may have an internal control-power or circuit fault\"],\n        steps: [\"Stop and isolate all power sources. Record the exact display, model and software information.\", \"With power isolated, disconnect optional tank\/well sensors and Wi-Fi\/4G modules, then have a qualified technician test the approved input source only.\", \"If the inverter starts normally, reconnect one external device at a time with power isolated to identify the affected circuit.\", \"If IC VOLTAGE remains with all external devices and the pump disconnected, stop and contact HOBER. Do not open the enclosure.\"],\n        evidence: [\"Model, serial and software information\", \"Complete fault-display photo\", \"Input voltage and source type\", \"Sensor\/module wiring photos\", \"Isolation-test sequence and video\"],\n        safety: \"Do not open the inverter or probe internal control-voltage points. Reconnect accessories only while all power is isolated.\",\n        source: \"IC VOLTAGE Troubleshooting.pdf\"\n      },\n      {\n        products: [\"inverter\"], aliases: [\"Output voltage measurement\", \"output voltage reading abnormal\", \"wrong AC output voltage reading\"],\n        keywords: [\"measure output voltage\", \"output voltage reading\", \"pwm voltage\", \"multimeter inaccurate\"],\n        tag: \"Measurement workflow\", title: \"Inverter output-voltage reading appears abnormal\",\n        causes: [\"The inverter output is PWM and some basic meters or clamp meters may display an inaccurate voltage\", \"The output voltage class or phase setting may not match the pump\", \"A real output-stage, wiring or load fault may still be present\"],\n        steps: [\"Record the inverter status, output frequency, current and the meter model used.\", \"Have a qualified electrician measure phase-to-phase voltage with a suitable true-RMS meter approved for variable-frequency-drive PWM output.\", \"Measure only under the approved no-load or controlled test procedure; compare the result with the exact inverter voltage class.\", \"If readings remain abnormal with a suitable meter and correct setup, stop and contact HOBER rather than adjusting hidden parameters.\"],\n        evidence: [\"Inverter model and voltage class\", \"Display frequency\/current screen\", \"Meter brand and model\", \"UV\/UW\/VW readings\", \"Approved test video\"],\n        safety: \"Live output measurement is for qualified electrical personnel only. PWM output can give misleading readings and hazardous voltage remains present.\",\n        source: \"Output Voltage Measurement method.pdf\"\n      },\n      {\n        products: [\"inverter\"], aliases: [\"AC OUT P-G S-C\", \"E:M P-G-S-C\", \"MPGSC\", \"phase to ground short\", \"ground short circuit\"],\n        keywords: [\"ground short\", \"earth fault\", \"phase to ground\", \"leakage to ground\"],\n        tag: \"Safety-critical fault\", title: \"Output phase-to-ground short circuit\",\n        causes: [\"Pump cable, waterproof joint or motor insulation may be damaged\"],\n        steps: [\"Stop immediately and isolate all power sources.\", \"Do not reconnect the pump until the output circuit has been tested.\", \"Have a qualified electrician test pump cable and motor insulation with suitable equipment and inspect any connected sensor circuit for leakage or water ingress.\", \"Confirm the PV string voltage is within the exact inverter model range.\", \"Repair or replace the damaged external component, or escalate if the external circuit tests healthy.\"],\n        evidence: [\"Model and code photo\", \"U\/V\/W, grounding and sensor wiring photos\", \"Cable\/joint photos\", \"Insulation test result\", \"PV configuration and voltage\", \"Pump nameplate\"],\n        safety: \"Electric-shock and equipment-damage risk. Do not bypass grounding, leakage protection or phase-to-ground protection.\",\n        source: \"2026 Solar Pumping Inverter User Manual; AC Out P-G S-C Troubleshooting.pdf\"\n      },\n      {\n        products: [\"inverter\"], aliases: [\"power on no display\", \"display flashing or stuck\", \"no display\", \"screen is off\", \"inverter not turning on\"],\n        keywords: [\"no display\", \"screen flashing\", \"stuck startup\", \"screen off\", \"not power on\", \"not turning on\", \"display blank\"],\n        tag: \"Confirmed symptom workflow\", title: \"Inverter display is blank, flashing or stuck during startup\",\n        causes: [\"PV polarity or input supply may be incorrect\", \"DC breaker, fuse, connector or cable may be open\", \"An optional sensor, Wi-Fi or 4G module may be affecting startup\", \"The display or inverter may require technical inspection\"],\n        steps: [\"Confirm whether the screen is fully off, flashing\/restarting, or frozen on the startup page.\", \"With power safely isolated, inspect polarity, DC breaker, fuses, connectors and input terminals.\", \"With power isolated, disconnect optional sensors and Wi-Fi\/4G modules, then retest the approved input source.\", \"Have a qualified electrician measure PV voltage at the inverter input during startup.\", \"If the input and peripheral isolation checks are normal, stop and contact support rather than opening the inverter.\"],\n        evidence: [\"Inverter model, serial and software information\", \"PV panel label and configuration\", \"Input and accessory wiring photos\", \"PV open-circuit\/startup voltage\", \"Complete power-on video\"],\n        safety: \"Do not open the inverter or touch energized DC terminals.\",\n        source: \"2026 Solar Pumping Inverter User Manual; Inverter display nothing or flashing Troubleshooting.pdf\"\n      },\n      {\n        products: [\"pump\"], pumpTypes: [\"all\"], aliases: [\"Low frequency + high current + no water\", \"pump runs but no water\", \"no water\", \"low water flow\", \"water flow intermittent\"],\n        keywords: [\"no water\", \"low frequency\", \"large current\", \"high current\", \"low flow\", \"little water\", \"intermittent water\", \"pump running\", \"poor flow\"],\n        tag: \"Confirmed symptom workflow\", title: \"Pump flow is absent, low or intermittent\",\n        causes: [\"Reverse rotation on a three-phase AC pump\", \"Insufficient solar power or poor PV connection\", \"Pump is not primed, suction pipe leaks or water level is too low\", \"Blocked pipe, incorrect pipe size, excessive head or worn hydraulic parts\"],\n        steps: [\"Stop if dry running or abnormal noise is present. Confirm water level and correct pump submergence\/priming.\", \"Check valves, non-return valve direction, inlet blockage, pipe leakage and actual total head. Normal operation should remain within the approved pump curve rather than exceeding the pump head limit.\", \"Check sunlight, shading, panel cleanliness, PV wiring and operating frequency. Record whether array power is appropriately sized for the pump.\", \"For a single-phase pump, verify the approved common\/start\/run wiring. For a three-phase AC pump, have a qualified installer verify rotation using the approved procedure.\", \"Compare the actual duty point with the approved pump curve and system design. Do not increase output voltage or hidden settings without HOBER review.\"],\n        evidence: [\"Pump\/inverter labels\", \"PV panel quantity and string configuration\", \"Water level and total head\", \"Pipe route\/diameter\", \"Operating voltage\/frequency\/current\", \"Water outlet and startup videos\"],\n        safety: \"Do not allow the pump to run dry or change wiring while energized.\",\n        source: \"2026 Solar Pumping Inverter User Manual; Low output frequency & large current & No water ouput.pdf\"\n      },\n      {\n        products: [\"system\"], aliases: [\"strong sun but low solar and pump output\", \"solar output is small\", \"low pump output in strong sunlight\"],\n        keywords: [\"strong sunlight low output\", \"solar output small\", \"pump output small\", \"partial shading\", \"string mismatch\"],\n        tag: \"PV performance workflow\", title: \"Strong sunlight but solar power and pump output remain low\",\n        causes: [\"Partial shading, dirt or a weak\/damaged module may reduce string current\", \"Parallel strings may have unequal voltage or a poor connector\/joint\", \"A hot or defective DC breaker may have high contact resistance\", \"The displayed power may be limited by pump load, system head or an incorrect operating point\"],\n        steps: [\"Inspect every module for partial shading, dirt, damage and orientation differences; remove the cause where safe.\", \"Record the voltage and operating current of each string. Significant string differences require module-by-module testing by qualified personnel.\", \"Inspect connectors, fuses, cable joints and the DC breaker for discoloration or abnormal heating; replace confirmed defective components.\", \"Use approved PV test equipment for module current\/voltage testing. Do not short-circuit modules unless a qualified technician follows the module and meter procedure.\", \"Compare inverter input power, output frequency\/current and water output with the array design and approved pump duty point.\"],\n        evidence: [\"Panel labels, quantity and string diagram\", \"Photos showing shading and panel condition\", \"Per-string voltage\/current readings\", \"DC breaker and connector photos\/temperature\", \"Inverter power\/frequency\/current screen\", \"Water output video\"],\n        safety: \"PV strings remain live in sunlight. Testing and DC breaker replacement must be performed by qualified solar electrical personnel.\",\n        source: \"Solar radiation is strong, but the solar output & pump output is small Troubleshooting.pdf\"\n      },\n      {\n        products: [\"pump\"], pumpTypes: [\"nis\", \"chm\"], aliases: [\"surface pump does not work\", \"surface pump cannot suck water\", \"surface pump no water\"],\n        keywords: [\"surface pump\", \"cannot suck\", \"not primed\", \"air in suction\", \"suction head\"],\n        tag: \"Surface-pump workflow\", title: \"Surface pump runs but cannot draw water\",\n        causes: [\"The pump or suction pipe has not been fully primed\", \"Air is entering between the water inlet and pump suction port\", \"The vertical suction lift exceeds the practical limit for the installation\", \"The foot valve\/check valve or inlet may be leaking or blocked\"],\n        steps: [\"Stop the pump to prevent dry running, then completely prime the pump and suction line.\", \"Check every suction-side joint, seal, foot valve and pipe section for air leakage.\", \"Confirm the vertical distance from water level to pump inlet. The referenced installation guide requires it to remain within 3 m; confirm the exact pump model and site conditions.\", \"Check the inlet for blockage and confirm the foot valve retains water.\", \"Retest briefly while recording suction condition and outlet flow; escalate if priming and suction geometry are correct.\"],\n        evidence: [\"Pump model and nameplate\", \"Water level and measured suction lift\", \"Suction-pipe route and diameter\", \"Foot valve\/inlet photos\", \"Priming and startup video\"],\n        safety: \"Do not run a surface pump dry. Depressurize and isolate power before opening the suction line.\",\n        source: \"Surface pump not works Troubleshooting.pdf\"\n      },\n      {\n        products: [\"inverter\"], aliases: [\"OFF PV L-Power\", \"PV LOW POWER\", \"PV L-Power\", \"restarts frequently\", \"starts and stops\"],\n        keywords: [\"l-power\", \"restart\", \"starts and stops\", \"frequent stop\", \"cloudy\", \"morning evening\"],\n        tag: \"Confirmed symptom workflow\", title: \"Low-solar-power standby or frequent restart\",\n        causes: [\"Available solar power is insufficient\", \"A single-phase pump may be wired incorrectly, creating excessive current and low frequency\", \"PV low-power, hybrid or stop-frequency settings may not match the system\", \"Excessive system head or a check valve held closed by water-column pressure may overload the pump\", \"Shading, dirty panels, damaged connectors or undersized array\"],\n        steps: [\"Record whether the behavior occurs only in weak sunlight, morning, evening or cloudy weather.\", \"Check shading, panel cleanliness, damaged panels, fuses, connectors and cable condition.\", \"For a single-phase 220 V pump, verify common\/start\/run wiring against the approved wiring guide.\", \"Check actual head, check-valve operation, running current and frequency; do not continue if the pump is overloaded.\", \"Measure PV voltage during startup and record inverter frequency\/current before the stop.\", \"Have HOBER support review PV sizing and low-power\/hybrid\/stop-frequency settings. Perform a factory reset only when the exact model procedure and original settings are documented.\"],\n        evidence: [\"Model and display video\", \"Pump nameplate and single-phase wiring photo when applicable\", \"Panel labels and configuration\", \"Time\/weather condition\", \"Startup voltage, current and frequency\", \"Actual head and check-valve condition\"],\n        safety: \"Do not make repeated parameter changes without recording the original settings.\",\n        source: \"2026 Solar Pumping Inverter User Manual; PV LOW POWER Troubleshooting.pdf\"\n      },\n      {\n        products: [\"bldc\"], aliases: [\"controller error led\", \"error light on\", \"BLDC controller error\", \"unknown BLDC code\"],\n        keywords: [\"error led\", \"error light\", \"controller error\", \"unknown code\"],\n        tag: \"BLDC controller triage\", title: \"BLDC controller error indicator\",\n        causes: [\"Input voltage, motor wiring, load, temperature or controller protection may be active\", \"The exact numeric history code requires confirmation for the controller version\"],\n        steps: [\"Record the numeric error history and controller software\/model information exactly.\", \"Stop and inspect PV\/battery input polarity, voltage and all U\/V\/W motor terminals.\", \"Check for jammed pump, damaged cable, water ingress and blocked controller cooling.\", \"Send the numeric code and evidence to HOBER; do not interpret an unconfirmed code using an AC inverter table.\"],\n        evidence: [\"Controller model and software version\", \"Exact error-history number\", \"Pump label\", \"Input and motor wiring photos\", \"Startup video\"],\n        safety: \"Do not open the controller or repeatedly restart after overcurrent, short-circuit or water-ingress symptoms.\",\n        source: \"BLDC Solar Pump Controller User Manual V11.8.24\"\n      },\n      {\n        products: [\"bldc\"], aliases: [\"BLDC motor does not start\", \"BLDC startup failure\", \"pump shakes but does not start\"],\n        keywords: [\"does not start\", \"startup failure\", \"not rotate\", \"shakes\", \"jerks\"],\n        tag: \"BLDC symptom workflow\", title: \"BLDC motor fails to start\",\n        causes: [\"PV\/battery voltage is outside the controller range\", \"U\/V\/W motor wiring or cable is abnormal\", \"Motor pole-pair or maximum-speed settings may not match\", \"Pump is mechanically blocked or controller protection is active\"],\n        steps: [\"Confirm controller model, pump voltage and input voltage are compatible.\", \"Inspect U\/V\/W wiring, connectors, cable joints and pump for mechanical blockage.\", \"Record the Error LED and error-history number.\", \"Do not change pole-pair or speed settings until the pump motor data is confirmed by HOBER.\"],\n        evidence: [\"Controller and pump labels\", \"PV\/battery voltage\", \"Motor wiring photos\", \"Error history\", \"Startup video\"],\n        safety: \"Stop if the pump only jerks, hums, draws high current or becomes hot.\",\n        source: \"BLDC Solar Pump Controller User Manual V11.8.24\"\n      },\n      {\n        products: [\"bldc\"], aliases: [\"BLDC over voltage\", \"BLDC low voltage\", \"battery low voltage\", \"PV overvoltage\"],\n        keywords: [\"over voltage\", \"low voltage\", \"battery voltage\", \"pv voltage\", \"input voltage\"],\n        tag: \"BLDC input protection\", title: \"BLDC controller input-voltage protection\",\n        causes: [\"PV Voc may exceed the controller maximum\", \"PV Vmp or battery voltage may be below the operating threshold\", \"Incorrect PV series\/parallel or battery-type setup\"],\n        steps: [\"Stop and confirm the exact controller model and compatible pump voltage.\", \"Record each panel label, string layout and measured PV Voc\/Vmp.\", \"For battery operation, confirm battery voltage and battery-type setting against the manual.\", \"Correct the input design before reconnecting; do not exceed the model maximum Voc.\"],\n        evidence: [\"Controller model\", \"Panel\/battery labels\", \"Series\/parallel diagram\", \"Measured input voltage\", \"Display\/error-history photo\"],\n        safety: \"Incorrect DC voltage can damage the controller. Only qualified personnel should measure or reconfigure live DC circuits.\",\n        source: \"BLDC Solar Pump Controller User Manual V11.8.24\"\n      },\n      {\n        products: [\"bldc\"], aliases: [\"BLDC over current\", \"BLDC overload\", \"output short circuit\", \"output phase lost\"],\n        keywords: [\"over current\", \"overload\", \"short circuit\", \"phase lost\", \"high current\"],\n        tag: \"BLDC output protection\", title: \"BLDC overcurrent, overload or output-circuit fault\",\n        causes: [\"Pump is jammed or overloaded\", \"Motor cable\/U\/V\/W circuit is open, shorted or poorly connected\", \"Motor settings or controller\/pump matching may be incorrect\"],\n        steps: [\"Stop and isolate power; inspect pump, motor cable and U\/V\/W terminals.\", \"Check for debris, sand, seized hydraulics, damaged cable or water ingress.\", \"Have a qualified technician test phase resistance balance and insulation.\", \"Send motor data and error history for controller\/pump matching review.\"],\n        evidence: [\"Controller and pump labels\", \"Error-history number\", \"U\/V\/W photos\", \"Resistance\/insulation readings\", \"Startup video\"],\n        safety: \"Do not bypass output protection or keep restarting a stalled pump.\",\n        source: \"BLDC Solar Pump Controller User Manual V11.8.24\"\n      },\n      {\n        products: [\"system\"], aliases: [\"Two-wire sensor continuous alarm\", \"tank full but pump runs\", \"tank empty but pump stops\", \"well empty\", \"water sensor problem\", \"float switch problem\"],\n        keywords: [\"tank sensor\", \"two wire sensor\", \"continuous alarm\", \"float switch\", \"well sensor\", \"borehole sensor\", \"tank full\", \"tank empty\", \"well empty\"],\n        tag: \"Water-level control\", title: \"Tank or borehole sensor status is incorrect\",\n        causes: [\"Float\/sensor wiring may use the wrong terminals or the high\/low wire order may be reversed\", \"Sensor contact logic or mounting position may be incorrect\", \"Cable damage, corrosion or wet joint may create a false status\"],\n        steps: [\"Record the displayed Tank and Borehole status and the alarm pattern before changing wiring.\", \"Safely isolate power and inspect the Tank L\/M\/H or Well L\/M terminals for the exact controller model.\", \"For an approved two-wire float conversion, verify the exact high\/low sequence and contact behavior against the wiring guide; incorrect order can cause continuous alarm or reversed start\/stop logic.\", \"Check sensor movement, mounting height, cable continuity and wet joints.\", \"Test with the approved sensor procedure; do not bypass dry-run or tank-full protection for normal operation.\"],\n        evidence: [\"Controller model\", \"Sensor screen status\", \"Terminal wiring photo\", \"Sensor installation photo\/video\", \"Cable continuity result\"],\n        safety: \"Do not leave the pump running without verified dry-run and overflow protection.\",\n        source: \"BLDC Solar Pump Controller User Manual V11.8.24; How to connect the two-wires sensors.pdf\"\n      },\n      {\n        products: [\"pump\"], pumpTypes: [\"all\"], aliases: [\"pump makes noise\", \"abnormal noise\", \"pump vibration\", \"motor vibration\"],\n        keywords: [\"noise\", \"vibration\", \"rattling\", \"grinding\", \"humming\"],\n        tag: \"Mechanical symptom\", title: \"Abnormal pump noise or vibration\",\n        causes: [\"Dry running, air in the suction line or cavitation\", \"Reverse rotation, debris, worn hydraulic parts or bearing damage\", \"Loose installation, unsuitable speed or electrical phase imbalance\"],\n        steps: [\"Stop immediately if noise is severe, metallic or accompanied by low flow\/high current.\", \"Confirm water level, priming, inlet blockage and suction-pipe air leakage.\", \"Check mounting, pipe strain, rotation direction and operating current\/frequency.\", \"Do not dismantle the pump at site unless the service scope and technician authorization are confirmed.\"],\n        evidence: [\"Pump and inverter\/controller labels\", \"Noise\/startup video\", \"Current\/frequency\", \"Water level and head\", \"Installation photos\"],\n        safety: \"Do not continue operating a dry, seized or mechanically damaged pump.\",\n        source: \"2026 installation and troubleshooting guides\"\n      },\n      {\n        products: [\"pump\"], pumpTypes: [\"all\"], aliases: [\"pump current too high\", \"high current\", \"cable gets hot\", \"motor gets hot\"],\n        keywords: [\"high current\", \"current too high\", \"cable hot\", \"motor hot\", \"overheating cable\"],\n        tag: \"Electrical\/load symptom\", title: \"Pump current or temperature is abnormally high\",\n        causes: [\"Pump overload, blockage, high friction or incorrect duty point\", \"Low\/imbalanced voltage, damaged cable or undersized cable\", \"Incorrect motor data, phase issue or unsuitable inverter\/controller matching\"],\n        steps: [\"Stop and allow the equipment to cool.\", \"Compare running current with the pump nameplate and record output frequency.\", \"Check blockage, valves, pipe condition, cable size\/length, terminals and voltage balance.\", \"Have insulation and phase resistance checked before further operation.\"],\n        evidence: [\"Nameplates\", \"Current\/frequency readings\", \"Cable size and length\", \"Terminal photos\", \"Resistance\/insulation readings\"],\n        safety: \"Overheated cable or motor is a fire and insulation-failure risk. Do not bypass protection.\",\n        source: \"2026 installation and troubleshooting guides\"\n      },\n      {\n        products: [\"pump\"], pumpTypes: [\"all\"], aliases: [\"pump does not start\", \"pump trips immediately\", \"motor hums but does not rotate\"],\n        keywords: [\"does not start\", \"trip\", \"hums\", \"not rotate\", \"motor protection\"],\n        tag: \"Pump electrical \/ mechanical triage\", title: \"Pump does not start or protection trips\",\n        causes: [\"Power, phase, voltage or control signal may be missing\", \"Motor cable, winding or insulation may be damaged\", \"The impeller or shaft may be blocked\", \"Motor protection may be reacting to overload, dry running or unsuitable settings\"],\n        steps: [\"Stop repeated restart attempts and isolate the equipment.\", \"Record the exact pump model, motor voltage\/phase\/current, protection indication and when the trip occurs.\", \"Have a qualified electrician verify supply\/output voltage, phase continuity, cable condition, winding resistance balance and insulation.\", \"Confirm the pump shaft or impeller is not blocked using the manufacturer-approved service method; do not force or dismantle it without authorization.\", \"Compare actual operating conditions and protection settings with the exact pump and motor manual.\"],\n        evidence: [\"Pump and motor nameplates\", \"Protection display\/photo\", \"Voltage and current readings\", \"Resistance and insulation readings\", \"Cable and terminal photos\", \"Startup video\"],\n        safety: \"Do not bypass motor protection or keep energizing a humming, seized or repeatedly tripping pump.\",\n        source: \"Local HOBER pump manuals; manufacturer IOM fault-finding guidance\"\n      },\n      {\n        products: [\"pump\"], pumpTypes: [\"ld\", \"nis\", \"vertical-multistage\", \"nb\", \"nd\", \"chm\"], aliases: [\"mechanical seal leakage\", \"water leaking from pump shaft\", \"pump casing leak\"],\n        keywords: [\"seal leak\", \"water leak\", \"shaft leak\", \"mechanical seal\", \"casing leak\"],\n        tag: \"Pump leakage triage\", title: \"Mechanical-seal or pump-casing leakage\",\n        causes: [\"Mechanical-seal faces or elastomers may be worn, dry-run damaged or incompatible with the liquid\", \"Shaft misalignment, vibration or pipe strain may have damaged the seal\", \"Casing gasket, drain\/vent plug or pipe joint may be leaking\", \"Pressure or liquid temperature may exceed the pump configuration\"],\n        steps: [\"Stop the pump, isolate power and safely depressurize the pipework.\", \"Clean the exterior and identify the exact leakage point without removing the guard or opening the pump.\", \"Record inlet\/outlet pressure, liquid temperature, liquid composition and whether the pump previously ran dry.\", \"Check external pipe support, base condition, vibration and visible alignment\/coupling condition.\", \"Seal replacement, shaft inspection and pump dismantling must be performed by an authorized pump technician after the evidence is reviewed.\"],\n        evidence: [\"Pump model\/serial and seal configuration\", \"Leak location photos and video\", \"Pressure and liquid-temperature readings\", \"Liquid description\", \"Base, piping and coupling photos\", \"Installation\/service history\"],\n        safety: \"Hot, pressurized, corrosive or contaminated liquid can cause serious injury. Isolate and depressurize before inspection.\",\n        source: \"CNP product\/IOM literature; KSB official centrifugal-pump maintenance guidance\"\n      },\n      {\n        products: [\"pump\"], pumpTypes: [\"deep-well\"], aliases: [\"deep-well pump no water or low flow\", \"borehole pump low pressure\", \"submersible well pump runs continuously\"],\n        keywords: [\"deep well\", \"borehole\", \"no water\", \"low flow\", \"low pressure\", \"runs continuously\"],\n        tag: \"Deep-well submersible pump\", title: \"Deep-well pump runs but water output is absent or low\",\n        causes: [\"Dynamic water level may be below the pump intake\", \"Check valve, intake screen, drop pipe or discharge line may be blocked or leaking\", \"Wrong rotation, low voltage or low operating frequency may reduce output\", \"Pump stages may be worn or the actual head may exceed the selected duty point\"],\n        steps: [\"Stop if dry running is suspected and record static\/dynamic water levels.\", \"Check discharge valves, non-return valve operation, visible pipe leakage and measured flow\/pressure.\", \"Record operating voltage, frequency and current; a qualified installer should verify rotation for a three-phase pump.\", \"Compare actual dynamic head and measured duty point with the approved pump curve.\", \"If the pump must be pulled, document cable, drop pipe, check valve and intake condition before cleaning or repair.\"],\n        evidence: [\"Pump\/motor nameplates\", \"Well depth and static\/dynamic water levels\", \"Installation depth\", \"Flow\/pressure\/current\/frequency readings\", \"Drop-pipe and valve details\", \"Startup\/outlet video\"],\n        safety: \"Do not run a submersible pump with the intake above water. Pump lifting and electrical testing require qualified personnel.\",\n        source: \"HOBER submersible pump manuals; CNP official well-pump guidance; Grundfos official fault-finding chart\"\n      },\n      {\n        products: [\"pump\"], pumpTypes: [\"deep-well\"], aliases: [\"deep-well pump produces sand\", \"dirty or sandy well water\", \"well pump abrasion\"],\n        keywords: [\"sand\", \"dirty water\", \"sediment\", \"abrasion\", \"well silt\"],\n        tag: \"Deep-well water-quality symptom\", title: \"Deep-well pump delivers sand or dirty water\",\n        causes: [\"The pump may be installed too close to the well bottom\", \"The well may be silting or the screen\/gravel pack may be damaged\", \"Excessive flow may be drawing sediment into the well\", \"Pump stages and check valves may already have abrasive wear\"],\n        steps: [\"Stop if sand concentration is high or flow\/current changes suddenly.\", \"Record installation depth, well-bottom depth, water level and when sand first appeared.\", \"Collect a clear water sample and a timed settling photo\/video; do not infer pump quality from appearance alone.\", \"Have the well condition and pump duty reviewed before changing installation depth or flow.\", \"If the pump is lifted, document intake screen, impellers, check valve and abrasion pattern for technical assessment.\"],\n        evidence: [\"Pump model\", \"Well construction and depths\", \"Water sample photos\", \"Flow\/current history\", \"Pump installation position\", \"Inspection photos if lifted\"],\n        safety: \"Continued sand pumping can rapidly wear hydraulic parts and may damage the motor seal. Stop when output or current becomes abnormal.\",\n        source: \"CNP official well-pump troubleshooting guidance; HOBER field evidence workflow\"\n      },\n      {\n        products: [\"pump\"], pumpTypes: [\"deep-well\"], aliases: [\"deep-well pump starts and stops frequently\", \"well pump short cycling\", \"pressure tank cycles\"],\n        keywords: [\"short cycling\", \"frequent start\", \"pressure tank\", \"pressure switch\", \"check valve\"],\n        tag: \"Deep-well pressure-system symptom\", title: \"Deep-well pump starts and stops too frequently\",\n        causes: [\"Pressure tank pre-charge or diaphragm may be incorrect\", \"Pressure-switch differential may be unsuitable\", \"A leaking pipe or check valve may cause pressure loss\", \"Pump capacity may be oversized for the actual demand\"],\n        steps: [\"Record cut-in\/cut-out pressures and the cycle duration without changing settings.\", \"Inspect visible pipework and check valve behavior for pressure loss.\", \"Have a qualified technician verify pressure-tank pre-charge using the tank manufacturer's procedure.\", \"Compare pump capacity, pressure setting and tank drawdown volume with actual demand.\", \"Escalate repeated cycling before motor damage occurs.\"],\n        evidence: [\"Pump model\", \"Pressure-tank model\/volume\", \"Cut-in\/cut-out pressure\", \"Cycle video and duration\", \"Pipe\/check-valve photos\", \"System design flow\"],\n        safety: \"Isolate power and release water pressure before servicing a pressure tank or switch.\",\n        source: \"CNP official well-pump guidance; manufacturer pressure-system fault finding\"\n      },\n      {\n        products: [\"pump\"], pumpTypes: [\"wq\"], aliases: [\"WQ sewage pump blocked or low flow\", \"WQ runs but does not deliver rated flow\", \"sewage pump clogged\"],\n        keywords: [\"wq\", \"sewage\", \"clogged\", \"blocked\", \"low flow\", \"solids\"],\n        tag: \"WQ submersible sewage pump\", title: \"WQ sewage pump is blocked or delivers low flow\",\n        causes: [\"Impeller, inlet or discharge pipe may be blocked by solids or fibers\", \"Rotation may be incorrect\", \"Actual head or liquid density may exceed the selected duty\", \"The pump may not be seated correctly on the automatic coupling\", \"Impeller or wear components may be damaged\"],\n        steps: [\"Stop and isolate the pump; treat the liquid and equipment as contaminated.\", \"Record liquid type, approximate solids\/fiber content and whether the blockage occurred suddenly.\", \"Check discharge valves, external pipe blockage and automatic-coupling seating without entering the wet well.\", \"Have qualified personnel lift and clean the pump using the approved lifting points and confined-space procedure.\", \"After cleaning, verify rotation, current, flow and head against the pump curve before returning to service.\"],\n        evidence: [\"Exact WQ model and impeller type\", \"Liquid\/solids description\", \"Flow\/head\/current readings\", \"Installation\/coupling photos\", \"Blocked material photos\", \"Post-cleaning test video\"],\n        safety: \"Sewage, confined spaces and lifting work create biological, gas, electrical and crush hazards. Qualified personnel and site procedures are required.\",\n        source: \"CNP WQ official product literature; Grundfos official sewage-pump fault-finding guidance\"\n      },\n      {\n        products: [\"pump\"], pumpTypes: [\"wq\"], aliases: [\"WQ pump trips or overheats\", \"sewage pump thermal trip\", \"WQ moisture alarm\"],\n        keywords: [\"wq trip\", \"thermal\", \"overheat\", \"moisture\", \"leak sensor\", \"phase missing\"],\n        tag: \"WQ motor-protection symptom\", title: \"WQ sewage pump trips, overheats or reports moisture\",\n        causes: [\"A phase, cable or supply condition may be abnormal\", \"Impeller blockage or excessive liquid density may overload the motor\", \"Cooling may be inadequate for the permitted installation mode\", \"Moisture protection may indicate seal or cable-entry leakage\"],\n        steps: [\"Stop repeated resets and isolate the pump.\", \"Record the protection indication, current on each phase, voltage and time to trip.\", \"Check external cable, connector, control panel and permitted liquid level\/installation mode.\", \"Have qualified personnel check insulation and protection circuits according to the exact WQ manual.\", \"A moisture alarm, low insulation result or contaminated oil chamber requires authorized service assessment; do not reopen or reseal on site without approval.\"],\n        evidence: [\"Pump model and motor data\", \"Protection\/alarm photo\", \"Three-phase voltage\/current readings\", \"Insulation result\", \"Liquid level and installation photos\", \"Time-to-trip video\"],\n        safety: \"Do not operate a submersible sewage pump with a moisture alarm, damaged cable or low insulation.\",\n        source: \"CNP WQ product\/manual; official sewage-pump fault-finding guidance\"\n      },\n      {\n        products: [\"pump\"], pumpTypes: [\"wq\"], aliases: [\"WQ automatic coupling or float problem\", \"sewage pump does not start automatically\", \"WQ pump not seated\"],\n        keywords: [\"auto coupling\", \"float\", \"level switch\", \"not seated\", \"automatic start\"],\n        tag: \"WQ installation\/control symptom\", title: \"WQ pump does not start automatically or is not seated correctly\",\n        causes: [\"Float\/level control may be stuck, incorrectly positioned or wired\", \"The pump may not be fully engaged with the automatic coupling\", \"Guide rails, chain or coupling seal may be misaligned or obstructed\", \"The control panel may be waiting for another level or protection condition\"],\n        steps: [\"Record the liquid level, controller status and float\/level-sensor position.\", \"Test the level-control sequence from a safe location; do not enter the wet well.\", \"Inspect visible guide rails, lifting chain and coupling alignment for obstruction.\", \"Have qualified lifting personnel reseat the pump if coupling leakage or misalignment is suspected.\", \"Verify automatic start\/stop and leakage-free discharge under controlled commissioning.\"],\n        evidence: [\"WQ model and installation type\", \"Controller\/float wiring photos\", \"Wet-well level and sensor video\", \"Guide-rail\/coupling photos\", \"Automatic-cycle test video\"],\n        safety: \"Never enter a wet well without a confined-space permit, gas testing, isolation and rescue plan.\",\n        source: \"CNP WQ official product literature and installation practice\"\n      },\n      {\n        products: [\"pump\"], pumpTypes: [\"ld\", \"nis\"], aliases: [\"LD or NIS pump cavitation\", \"inline or end-suction pump vibration\", \"centrifugal pump crackling noise\"],\n        keywords: [\"cavitation\", \"ld\", \"nis\", \"niso\", \"vibration\", \"noise\", \"suction pressure\"],\n        tag: \"Inline \/ end-suction pump\", title: \"LD or NIS\/NISO pump has cavitation, noise or vibration\",\n        causes: [\"Inlet pressure\/NPSH may be insufficient or suction piping may admit air\", \"Pump may operate too far from the selected duty point\", \"Rotation, coupling alignment, base or pipe support may be incorrect\", \"Impeller imbalance, bearing wear or pipe strain may be present\"],\n        steps: [\"Stop if vibration rises rapidly, the pump sounds like gravel, or bearing temperature is abnormal.\", \"Record inlet\/outlet pressure, flow, liquid temperature, current and vibration\/noise video.\", \"Check suction valve, strainer, air leakage, pipe diameter\/routing and available inlet pressure.\", \"Verify rotation, rigid level foundation, pipe support and visible coupling alignment.\", \"Compare the measured duty point with the approved curve; internal inspection and alignment correction require an authorized pump technician.\"],\n        evidence: [\"Exact LD\/NIS\/NISO model\", \"Inlet\/outlet pressure and flow\", \"Liquid temperature\", \"Current and vibration readings\", \"Base\/piping\/coupling photos\", \"Noise video\"],\n        safety: \"Do not run continuously under cavitation, closed-valve or severe-vibration conditions.\",\n        source: \"CNP LD and NIS\/NISO official literature; KSB official centrifugal-pump operating guidance\"\n      },\n      {\n        products: [\"pump\"], pumpTypes: [\"vertical-multistage\", \"nb\", \"nd\"], aliases: [\"vertical multistage pump low pressure\", \"CDL CDLF CDM CDMF NB ND no flow\", \"multistage pump cannot build head\"],\n        keywords: [\"cdl\", \"cdlf\", \"cdm\", \"cdmf\", \"nb\", \"nd\", \"low pressure\", \"no flow\", \"cannot build\"],\n        tag: \"Vertical multistage pump\", title: \"Vertical multistage pump cannot build the required flow or pressure\",\n        causes: [\"The non-self-priming pump may not be completely filled and vented\", \"Inlet pressure may be too low or the inlet may be blocked\", \"Rotation or speed may be incorrect\", \"Operating point may be outside the curve or internal stages may be worn\", \"Liquid may contain solids\/fibers or differ from the approved clean-liquid duty\"],\n        steps: [\"Stop dry running and confirm the pump casing and inlet line are fully filled and safely vented.\", \"Record inlet\/outlet pressure, flow, speed\/frequency and motor current.\", \"Check inlet supply, valves, strainer, check valve, pipe restrictions and visible leakage.\", \"Have a qualified installer verify rotation and compare the measured duty point with the exact model curve.\", \"Confirm liquid temperature and composition are within the exact model specification; internal stage inspection requires authorized service.\"],\n        evidence: [\"Exact pump model and complete nameplate\", \"Inlet\/outlet pressure and flow\", \"Frequency\/current\", \"Liquid type and temperature\", \"Piping\/valve photos\", \"Commissioning video\"],\n        safety: \"These pumps are non-self-priming. Never run dry or open vent\/drain plugs while the system is hot or pressurized.\",\n        source: \"Local CNP CDL\/CDLF\/CDM\/CDMF\/NB manuals; CNP official product literature\"\n      },\n      {\n        products: [\"pump\"], pumpTypes: [\"vertical-multistage\", \"nb\", \"nd\"], aliases: [\"vertical multistage pump vibration or high current\", \"CDL CDM NB pump noise\", \"multistage pump overload\"],\n        keywords: [\"multistage vibration\", \"multistage overload\", \"cdl noise\", \"cdm high current\", \"nb vibration\"],\n        tag: \"Vertical multistage mechanical\/load symptom\", title: \"Vertical multistage pump has vibration, noise or overload\",\n        causes: [\"Cavitation or air may be present at the inlet\", \"Flow may be too low or too high for the permitted operating range\", \"Coupling, shaft height, base or piping alignment may be incorrect\", \"Bearing, seal or hydraulic stages may be worn or obstructed\"],\n        steps: [\"Stop if vibration, current or temperature exceeds the normal baseline.\", \"Record inlet\/outlet pressure, flow, current, frequency, temperature and vibration\/noise.\", \"Check the pump is level, firmly supported and not carrying pipe strain.\", \"Confirm inlet pressure and operating point are within the exact model curve and minimum\/maximum flow limits.\", \"Coupling adjustment, shaft-height correction and internal inspection are authorized-service work.\"],\n        evidence: [\"Pump model\", \"Pressure\/flow\/current\/frequency readings\", \"Temperature and vibration readings\", \"Base\/piping photos\", \"Coupling-guard exterior photo\", \"Service history\"],\n        safety: \"Do not remove the coupling guard, adjust the shaft or work on the pump while energized or pressurized.\",\n        source: \"Local CNP LD\/NB\/CDM literature; manufacturer centrifugal-pump IOM guidance\"\n      },\n      {\n        products: [\"pump\"], pumpTypes: [\"chm\"], aliases: [\"CHM booster pump cycles frequently\", \"booster pump does not stop\", \"CHM pressure unstable\"],\n        keywords: [\"chm\", \"booster\", \"short cycling\", \"does not stop\", \"pressure unstable\", \"pressure tank\"],\n        tag: \"CHM \/ booster pump\", title: \"CHM booster pump cycles frequently, does not stop or has unstable pressure\",\n        causes: [\"Pressure tank pre-charge, diaphragm or volume may be unsuitable\", \"Pressure\/flow sensor or control setting may be incorrect\", \"Non-return valve or pipe leakage may cause pressure loss\", \"Pump may be unable to reach the setpoint because of inlet restriction or unsuitable sizing\"],\n        steps: [\"Record setpoint, actual pressure, start\/stop pressures, cycle duration and controller indication.\", \"Check visible pipe leakage, non-return valve operation, inlet supply and closed\/partially closed valves.\", \"Have a qualified technician verify pressure-tank pre-charge and sensor signal using the component manuals.\", \"Compare the setpoint and required flow with the exact CHM\/CHME pump curve.\", \"If the pump cannot stop, isolate it before pressure exceeds the system rating and request control-system review.\"],\n        evidence: [\"CHM\/CHME model and controller version\", \"Pressure-tank model\/volume\", \"Setpoint and pressure readings\", \"Cycle video\", \"Sensor\/valve\/piping photos\", \"Required flow and pressure\"],\n        safety: \"Do not raise the setpoint beyond the pump, tank or piping pressure rating.\",\n        source: \"CNP official CHM\/CHME product literature; official booster-system fault finding\"\n      },\n      {\n        products: [\"pump\"], pumpTypes: [\"nd\"], aliases: [\"ND pump model needs confirmation\", \"ND pump fault\", \"unknown ND series symptom\"],\n        keywords: [\"nd pump\", \"nd series\", \"nd model\"],\n        tag: \"Model confirmation required\", title: \"ND pump model family must be confirmed before detailed diagnosis\",\n        causes: [\"The letters ND alone do not identify a verified pump construction, hydraulic design or service manual\", \"Using another family manual could produce an unsafe or incorrect diagnosis\"],\n        steps: [\"Photograph the complete pump and motor nameplates, not only the letters ND.\", \"Record whether the pump is submersible, inline, end-suction, vertical multistage or horizontal multistage.\", \"Record the liquid, flow, head, voltage\/phase and exact symptom.\", \"Use the general pump safety checks shown for the selected symptom, then contact HOBER for the matching manual before dismantling or changing settings.\"],\n        evidence: [\"Complete pump\/motor nameplates\", \"Full pump and installation photos\", \"Liquid\/application\", \"Flow\/head\/current\/pressure readings\", \"Fault video\"],\n        safety: \"Do not apply a manual from another pump family based only on a short model prefix.\",\n        source: \"HOBER model-verification rule; no confirmed public ND family manual located\"\n      },\n      {\n        products: [\"inverter\"], aliases: [\"water inside inverter\", \"inverter smoke or burning smell\", \"inverter rain damage\"],\n        keywords: [\"water ingress\", \"water inside inverter\", \"burning smell\", \"smoke\", \"rain damage\"],\n        tag: \"Stop immediately\", title: \"Inverter water ingress, smoke or burning smell\",\n        causes: [\"Enclosure leakage, condensation, unsuitable installation environment or internal electrical damage may be present\"],\n        steps: [\"Disconnect PV and AC sources using the approved safe-isolation procedure.\", \"Do not restart, open, heat-dry or connect another power source.\", \"Photograph the enclosure, cable entries and installation environment without touching internal parts.\", \"Send the model, event history and evidence for HOBER technical assessment.\"],\n        evidence: [\"Inverter model and serial label\", \"Full installation photos\", \"Visible external damage photos\", \"Weather\/water event history\", \"Description of smell\/smoke timing\"],\n        safety: \"Electric-shock and fire risk. Keep personnel away until all power sources are safely isolated.\",\n        source: \"HOBER customer after-sales safety rules\"\n      },\n      {\n        products: [\"bldc\"], aliases: [\"BLDC pump runs but no water\", \"BLDC low water flow\", \"BLDC intermittent flow\"],\n        keywords: [\"bldc no water\", \"bldc low flow\", \"bldc intermittent\"],\n        tag: \"BLDC hydraulic symptom\", title: \"BLDC pump water output is absent, low or intermittent\",\n        causes: [\"Water level, submergence, inlet blockage or pipe\/head condition may be unsuitable\", \"Available PV\/battery power may be insufficient\", \"Motor rotation\/commutation or pump hydraulic parts may be abnormal\", \"Controller and pump matching or speed setting may require confirmation\"],\n        steps: [\"Stop if dry running or abnormal noise is present; confirm water level and pump submergence.\", \"Check inlet, pipe, valves, check valve, leakage and actual total head.\", \"Record controller input voltage, output\/current indication and available solar conditions.\", \"Compare the pump model and measured duty point with the approved curve.\", \"Send the controller error history and startup video before changing motor parameters.\"],\n        evidence: [\"Controller and pump nameplates\", \"Error-history screen\", \"Water level and total head\", \"PV\/battery details\", \"Current\/speed indications\", \"Startup\/outlet video\"],\n        safety: \"Do not run a BLDC pump dry or change motor parameters without the exact pump data.\",\n        source: \"BLDC Solar Pump Controller User Manual V11.8.24; HOBER pump troubleshooting workflow\"\n      },\n      {\n        products: [\"bldc\"], aliases: [\"BLDC pump noise or vibration\", \"BLDC pump rattles\", \"BLDC motor vibration\"],\n        keywords: [\"bldc noise\", \"bldc vibration\", \"rattle\", \"grinding\"],\n        tag: \"BLDC mechanical symptom\", title: \"BLDC pump has abnormal noise or vibration\",\n        causes: [\"Dry running, air, sand, debris or cavitation may affect the hydraulic section\", \"Pump mounting, pipe load or internal hydraulic parts may be abnormal\", \"Incorrect motor parameters or unstable commutation may cause jerking\", \"Bearing or motor damage may require service\"],\n        steps: [\"Stop immediately for metallic noise, severe vibration, jerking or high current.\", \"Record water level, current\/speed display and a clear noise video.\", \"Check inlet blockage, sand\/debris, pipe strain and mounting.\", \"Record the controller error history and confirm the pump\/controller model pairing.\", \"Do not dismantle the sealed motor at site; escalate persistent mechanical noise.\"],\n        evidence: [\"Controller\/pump nameplates\", \"Noise\/startup video\", \"Water level and liquid condition\", \"Current\/speed display\", \"Installation photos\", \"Error history\"],\n        safety: \"Continued operation can convert a minor hydraulic issue into motor or bearing damage.\",\n        source: \"BLDC controller manual; manufacturer pump fault-finding guidance\"\n      },\n      {\n        products: [\"bldc\"], aliases: [\"BLDC pump high current or hot\", \"BLDC motor overheating\", \"BLDC cable gets hot\"],\n        keywords: [\"bldc high current\", \"bldc hot\", \"motor overheating\", \"cable hot\"],\n        tag: \"BLDC electrical\/load symptom\", title: \"BLDC pump current or temperature is abnormally high\",\n        causes: [\"Pump blockage, overload, excessive head or mechanical friction may be present\", \"Motor cable or connector may be damaged\", \"Controller\/pump matching or motor data may be incorrect\", \"Low input voltage can increase operating stress\"],\n        steps: [\"Stop and allow the equipment to cool.\", \"Record input voltage, controller current\/speed, error history and time to heat.\", \"Inspect the pump for blockage and check actual head, pipe and valve condition.\", \"Inspect motor cable\/connectors for damage, corrosion, heat or water ingress.\", \"Send the exact pump\/controller data for matching review before changing protection or motor parameters.\"],\n        evidence: [\"Controller and pump labels\", \"Input voltage\/current\/speed readings\", \"Error history\", \"Cable\/connector photos\", \"Head and pipe data\", \"Startup video\"],\n        safety: \"Do not bypass protection or continue running a hot cable, controller or motor.\",\n        source: \"BLDC Solar Pump Controller User Manual V11.8.24\"\n      },\n      {\n        products: [\"bldc\"], aliases: [\"water inside BLDC controller\", \"BLDC controller smoke\", \"BLDC burning smell\"],\n        keywords: [\"bldc water ingress\", \"bldc smoke\", \"bldc burning smell\", \"controller wet\"],\n        tag: \"Stop immediately\", title: \"BLDC controller water ingress, smoke or burning smell\",\n        causes: [\"Enclosure leakage, cable-entry leakage, condensation, reverse polarity or internal electrical damage may be present\"],\n        steps: [\"Safely disconnect PV\/battery power and keep the controller isolated.\", \"Do not restart, open, heat-dry or test with another controller\/pump.\", \"Photograph the controller exterior, cable entries, installation and visible external damage.\", \"Send the model, serial, event history and evidence for technical assessment.\"],\n        evidence: [\"Controller\/pump labels\", \"Installation and cable-entry photos\", \"Visible external damage\", \"Input configuration\", \"Event description\"],\n        safety: \"Electric-shock, fire and further equipment-damage risk. Keep the unit isolated.\",\n        source: \"HOBER BLDC after-sales safety rules\"\n      },\n      {\n        products: [\"system\"], aliases: [\"hybrid function does not run well\", \"works with AC but not solar\", \"works with solar but not AC\", \"generator input not working\", \"hybrid input problem\"],\n        keywords: [\"ac input\", \"generator\", \"solar only\", \"ac only\", \"hybrid\", \"changeover\"],\n        tag: \"Power-source symptom\", title: \"Solar \/ AC \/ generator source does not operate correctly\",\n        causes: [\"Source voltage, phase, frequency or wiring is outside the model requirement\", \"PV Vmp\/string configuration may be unsuitable for the AC voltage class\", \"Input selection\/changeover configuration may be incorrect\", \"Breaker, fuse, contactor or source capacity may be unsuitable\"],\n        steps: [\"Confirm the exact inverter model supports the intended power source and changeover method.\", \"Record AC source voltage, phase and frequency before connection and during startup.\", \"Record panel labels and the exact PV series\/parallel layout; have HOBER compare array Vmp with the inverter voltage class and current manual.\", \"Inspect input terminals, breakers, fuses and approved changeover wiring.\", \"Test one approved source at a time and send evidence for configuration review.\"],\n        evidence: [\"Inverter model\", \"Source nameplate\", \"AC voltage\/frequency readings\", \"Panel labels and PV string diagram\", \"Input wiring diagram\/photos\", \"Startup video for each source\"],\n        safety: \"Never connect grid\/generator power to U\/V\/W pump output terminals or parallel sources without an approved design.\",\n        source: \"2026 installation and troubleshooting guides; Hybrid function does not run well.pdf\"\n      },\n      {\n        products: [\"system\"], aliases: [\"multiple pumps and inverters parallel\", \"one inverter drives multiple pumps\", \"multiple inverters drive one pump\"],\n        keywords: [\"parallel pumps\", \"parallel inverters\", \"multiple pumps\", \"multiple inverters\", \"shared solar array\"],\n        tag: \"System-design restriction\", title: \"Multiple pumps or inverters are connected in parallel\",\n        causes: [\"One inverter driving multiple pumps cannot reliably identify an individual blocked or shorted pump\", \"Multiple inverters driving one pump simultaneously are not supported\", \"Shared PV or AC sources may be isolated incorrectly, leaving a live conductor connected\"],\n        steps: [\"Use one correctly sized inverter for one pump as the standard architecture.\", \"Do not connect multiple inverters to drive one pump at the same time.\", \"If multiple independent inverter-pump sets share an upstream source, use an approved system design with dedicated protection and isolation for each unit.\", \"For DC isolation, the approved device must disconnect both positive and negative conductors together where required by the design. For AC isolation, disconnect all required live conductors\/phases together.\", \"Submit the full single-line diagram to HOBER for review before commissioning a multi-pump shared-source system.\"],\n        evidence: [\"Single-line electrical diagram\", \"All inverter and pump models\", \"PV and AC source configuration\", \"Breaker\/isolator ratings and photos\", \"Cable sizes\", \"Commissioning sequence\"],\n        safety: \"Unsupported parallel operation can conceal a pump fault and damage another pump or inverter. Do not isolate only one PV pole or only part of a multi-phase AC source.\",\n        source: \"Multiple pumps and inverters parallel.pdf\"\n      },\n      {\n        products: [\"system\"], aliases: [\"water inside equipment\", \"water ingress\", \"rain damage\", \"burning smell\", \"smoke from equipment\"],\n        keywords: [\"water ingress\", \"water inside\", \"rain\", \"burning smell\", \"smoke\", \"burnt\"],\n        tag: \"Stop immediately\", title: \"Water ingress, smoke or burning smell\",\n        causes: [\"Unsafe installation environment, enclosure leakage, condensation or internal electrical damage\"],\n        steps: [\"Disconnect all power sources using the safe isolation procedure.\", \"Do not restart, open, dry with heat or apply another power source.\", \"Photograph the installation, enclosure, cable entries and visible damage without touching internal parts.\", \"Escalate directly to HOBER support for safety and service review.\"],\n        evidence: [\"Model and serial label\", \"Full installation photos\", \"Visible damage photos\", \"Weather\/water event history\", \"Description of smell\/smoke timing\"],\n        safety: \"Electric shock and fire risk. Keep personnel away until the system is safely isolated.\",\n        source: \"HOBER customer after-sales safety rules\"\n      },\n      {\n        products: [\"system\"], aliases: [\"wifi offline\", \"4G offline\", \"remote monitoring disconnected\", \"app cannot connect\"],\n        keywords: [\"wifi\", \"4g\", \"remote monitoring\", \"offline\", \"cannot connect\", \"communication\"],\n        tag: \"Communication symptom\", title: \"Wi-Fi \/ 4G remote monitoring is offline\",\n        causes: [\"Module power, antenna, signal, account binding or network configuration issue\", \"Remote-control ID may have been changed\", \"The inverter\/controller may operate normally while monitoring is offline\"],\n        steps: [\"Confirm whether the pumping system itself is running normally.\", \"Record module indicator status, signal condition and device ID without sharing passwords.\", \"Check module seating, antenna and approved network setup instructions.\", \"Do not change the controller Remote Control ID; send screenshots and identifiers to support.\"],\n        evidence: [\"Inverter\/controller model\", \"Module model\", \"Indicator photos\", \"App error screenshot\", \"Device ID and network type\"],\n        safety: \"Do not expose passwords, access tokens or private account credentials in the support case.\",\n        source: \"BLDC controller and Wi-Fi\/4G module manuals\"\n      },\n      {\n        products: [\"system\"], aliases: [\"pressure unstable\", \"water hammer\", \"pipe vibration\", \"leaking pipe\", \"pressure too high\"],\n        keywords: [\"pressure\", \"water hammer\", \"pipe vibration\", \"pipe leak\", \"leaking\"],\n        tag: \"Hydraulic-system symptom\", title: \"Unstable pressure, pipe vibration or leakage\",\n        causes: [\"Rapid start\/stop, unsuitable valve operation or trapped air\", \"Incorrect pipe size\/support, check-valve issue or leakage\", \"Pump duty point may not match the actual system head\/flow\"],\n        steps: [\"Stop if there is pipe movement, burst risk or major leakage.\", \"Inspect valves, check valve direction, air release, pipe supports and joints.\", \"Record operating frequency, pressure, flow and start\/stop sequence.\", \"Have the hydraulic design and control settings reviewed before changing ramp times or valves.\"],\n        evidence: [\"Pump model and curve\", \"Pipe diameter\/length\", \"Head and pressure readings\", \"Valve\/check-valve photos\", \"Startup\/shutdown video\"],\n        safety: \"Depressurize the system before opening any pipe or valve connection.\",\n        source: \"HOBER water-system troubleshooting workflow\"\n      },\n      {\n        products: [\"system\"], aliases: [\"performance below design\", \"not enough daily water\", \"cannot reach flow\", \"system output too low\"],\n        keywords: [\"daily water\", \"below design\", \"cannot reach\", \"not enough water\", \"performance\"],\n        tag: \"System-performance review\", title: \"System does not reach the expected water output\",\n        causes: [\"Solar resource or array power is below the design assumption\", \"Actual dynamic head and pipe loss are higher than expected\", \"Pump selection, rotation, pipe size or hydraulic condition is unsuitable\", \"Operating hours, shading, water level or equipment condition has changed\"],\n        steps: [\"Measure actual daily operating hours, flow and dynamic water level rather than estimating.\", \"Record PV power, orientation, shading and operating frequency through the day.\", \"Recalculate total dynamic head including pipe and fitting losses.\", \"Compare the measured duty point with the approved pump curve and original system design.\"],\n        evidence: [\"Original design target\", \"Pump\/inverter\/PV models\", \"Flow and dynamic-head measurements\", \"Daily operation record\", \"Pipe route and site photos\"],\n        safety: \"Do not increase speed or protection limits beyond the approved equipment ratings.\",\n        source: \"HOBER solar pumping system configuration and troubleshooting workflow\"\n      }\n    ];\n    var form = root.querySelector(\"[data-hsd-form]\");\n    var product = root.querySelector(\"[data-hsd-product]\");\n    var pumpField = root.querySelector(\"[data-hsd-pump-field]\");\n    var pumpType = root.querySelector(\"[data-hsd-pump-type]\");\n    var fault = root.querySelector(\"[data-hsd-fault]\");\n    var resultBox = root.querySelector(\"[data-hsd-result]\");\n    var current = null;\n    var currentQuery = \"\";\n    function esc(value) { return String(value).replace(\/[&<>\"']\/g, function (ch) { return ({\"&\":\"&amp;\",\"<\":\"&lt;\",\">\":\"&gt;\",\"\\\"\":\"&quot;\",\"'\":\"&#39;\"})[ch]; }); }\n    function list(tag, values) { return \"<\"+tag+\">\" + values.map(function(v){ return \"<li>\"+esc(v)+\"<\/li>\"; }).join(\"\") + \"<\/\"+tag+\">\"; }\n    function isCodeEntry(item) {\n      return item.tag.indexOf(\"Confirmed inverter\") !== -1 ||\n        item.tag.indexOf(\"Internal fault\") !== -1 ||\n        item.tag.indexOf(\"Safety-critical\") !== -1 ||\n        item.tag.indexOf(\"Confirmed troubleshooting\") !== -1 ||\n        item.tag.indexOf(\"BLDC input protection\") !== -1 ||\n        item.tag.indexOf(\"BLDC output protection\") !== -1;\n    }\n    function optionLabel(item) {\n      var code = item.aliases[0] || \"\";\n      return code && item.title.toLowerCase().indexOf(code.toLowerCase()) === -1\n        ? code + \" - \" + item.title\n        : item.title;\n    }\n    function populateFaults() {\n      var type = product.value;\n      var selectedPumpType = pumpType.value;\n      pumpField.hidden = type !== \"pump\";\n      fault.innerHTML = '<option value=\"\">Select a fault code or symptom<\/option>';\n      var codeGroup = document.createElement(\"optgroup\");\n      codeGroup.label = \"Fault codes & alarms\";\n      var symptomGroup = document.createElement(\"optgroup\");\n      symptomGroup.label = \"Operating symptoms\";\n      knowledge.forEach(function(item, index) {\n        if (item.products.indexOf(type) === -1) return;\n        if (type === \"pump\") {\n          var allowedPumpTypes = item.pumpTypes || [\"all\"];\n          if (allowedPumpTypes.indexOf(\"all\") === -1 && allowedPumpTypes.indexOf(selectedPumpType) === -1) return;\n        }\n        var option = document.createElement(\"option\");\n        option.value = String(index);\n        option.textContent = optionLabel(item);\n        (isCodeEntry(item) ? codeGroup : symptomGroup).appendChild(option);\n      });\n      if (codeGroup.children.length) fault.appendChild(codeGroup);\n      if (symptomGroup.children.length) fault.appendChild(symptomGroup);\n      var other = document.createElement(\"option\");\n      other.value = \"not-listed\";\n      other.textContent = \"Code \/ symptom not listed\";\n      fault.appendChild(other);\n      resultBox.innerHTML = '<div class=\"hsd-empty\"><div class=\"hsd-empty-mark\">?<\/div><h3>Select a fault code or symptom<\/h3><p>The estimated causes and recommended solution steps will appear here.<\/p><\/div>';\n      current = null;\n      currentQuery = \"\";\n    }\n    function actions() { return '<div class=\"hsd-actions\"><button class=\"hsd-action\" type=\"button\" data-copy>Copy support summary<\/button><a class=\"hsd-contact\" href=\"https:\/\/hobertek.com\/contact\/\" target=\"_self\" aria-label=\"Open the HOBER contact page\">Contact HOBER support &rarr;<\/a><p class=\"hsd-copy-note\" data-copy-note><\/p><\/div>'; }\n    function bindActions() { var copy=resultBox.querySelector(\"[data-copy]\"); if(copy) copy.addEventListener(\"click\",copySummary); }\n    function render(found, query) {\n      currentQuery=query; current=found && found.item ? found.item : null;\n      if (found && found.shortCode) {\n        resultBox.innerHTML='<span class=\"hsd-tag\">Short code detected<\/span><h3>Code '+esc(query)+' needs model confirmation<\/h3><p class=\"hsd-status\">This code is not confirmed for the selected product. No meaning has been invented.<\/p><div class=\"hsd-safety\"><strong>Safety:<\/strong> Stop if there is smoke, burning smell, water ingress, abnormal noise, hot cable or repeated tripping.<\/div><div class=\"hsd-block\"><h4>Safe next steps<\/h4>'+list(\"ol\",[\"Photograph the complete display and product model label.\",\"Record whether the code appears at power-on, startup, running or stopping.\",\"Record pump power, PV configuration and what changed before the fault.\",\"If the code returns after one normal reset, stop repeated restarting.\"])+ '<\/div><div class=\"hsd-block\"><h4>Evidence needed<\/h4>'+list(\"ul\",[\"Full display photo\",\"Model and serial label\",\"Pump nameplate\",\"PV or battery input details\",\"Startup video\"])+ '<\/div>'+actions(); bindActions(); return;\n      }\n      if (!found) {\n        resultBox.innerHTML='<span class=\"hsd-tag\">Needs confirmation<\/span><h3>No confirmed match found<\/h3><p class=\"hsd-status\">Add the exact model and complete display message. The tool will not guess an unconfirmed fault meaning.<\/p><div class=\"hsd-safety\"><strong>Safety:<\/strong> Stop if there is smoke, burning smell, water ingress, abnormal noise, melted cable or repeated serious alarm.<\/div><div class=\"hsd-block\"><h4>Next steps<\/h4>'+list(\"ol\",[\"Confirm the exact product model.\",\"Copy the complete display message.\",\"Record what happens before the fault and what changed.\",\"Collect nameplates, wiring photos, readings and a startup video.\"])+ '<\/div>'+actions(); bindActions(); return;\n      }\n      var item=found.item;\n      resultBox.innerHTML='<span class=\"hsd-tag\">Preliminary diagnosis<\/span><h3>'+esc(item.title)+'<\/h3><p class=\"hsd-status\">'+esc(found.match)+'. Source: '+esc(item.source)+'. Confirm the cause with the exact model, operating conditions and field evidence. This result does not establish warranty coverage, replacement eligibility or responsibility.<\/p><div class=\"hsd-safety\"><strong>Immediate safety check:<\/strong> '+esc(item.safety)+'<\/div><div class=\"hsd-block hsd-causes\"><h4>Estimated fault causes<\/h4>'+list(\"ol\",item.causes)+'<\/div><div class=\"hsd-block hsd-steps\"><h4>Recommended solution steps<\/h4>'+list(\"ol\",item.steps)+'<\/div><div class=\"hsd-block hsd-evidence\"><h4>If still unresolved, provide<\/h4>'+list(\"ul\",item.evidence)+'<\/div>'+actions(); bindActions();\n    }\n    function copySummary() {\n      var lines=[\"HOBER SUPPORT CASE\",\"\",\"Product: \"+product.options[product.selectedIndex].text];\n      if(product.value===\"pump\") lines.push(\"Pump type: \"+pumpType.options[pumpType.selectedIndex].text);\n      lines.push(\"Customer input: \"+currentQuery,\"Preliminary result: \"+(current?current.title:\"Needs model confirmation\"),\"Notice: Preliminary technical guidance only; warranty and responsibility require evidence review.\",\"\");\n      if(current){ lines.push(\"Checks:\"); current.steps.forEach(function(v,i){lines.push((i+1)+\". \"+v);}); lines.push(\"\",\"Evidence needed:\"); current.evidence.forEach(function(v){lines.push(\"- \"+v);}); }\n      else { lines.push(\"Please attach the full display photo, model\/serial label, pump nameplate, input details and startup video.\"); }\n      var text=lines.join(\"\\n\"); var note=resultBox.querySelector(\"[data-copy-note]\");\n      if(navigator.clipboard && navigator.clipboard.writeText){ navigator.clipboard.writeText(text).then(function(){note.textContent=\"Summary copied. Attach the evidence before contacting support.\";}).catch(function(){window.prompt(\"Copy this support summary:\",text);}); }\n      else { window.prompt(\"Copy this support summary:\",text); }\n    }\n    product.addEventListener(\"change\", populateFaults);\n    pumpType.addEventListener(\"change\", populateFaults);\n    form.addEventListener(\"submit\",function(event){\n      event.preventDefault();\n      if (!fault.value) return;\n      var query = fault.options[fault.selectedIndex].text;\n      if (fault.value === \"not-listed\") render(null, query);\n      else render({item:knowledge[Number(fault.value)], match:\"Selected from the HOBER troubleshooting list\"}, query);\n    });\n    populateFaults();\n  })();\n  <\/script>\n<\/section>\n<!-- END HOBER SUPPORT DIAGNOSTIC EMBED -->\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-90b73d1 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"90b73d1\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-25a4b1c\" data-id=\"25a4b1c\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2f0a9fa elementor-widget elementor-widget-spacer\" data-id=\"2f0a9fa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-252bdab elementor-widget elementor-widget-text-editor\" data-id=\"252bdab\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Por favor, prepare las especificaciones del panel solar, la bomba y el inversor, el c\u00f3digo de error y una descripci\u00f3n clara del problema. Si es posible, env\u00ede v\u00eddeos que muestren el inversor funcionando con y sin carga para ayudarnos a diagnosticar el problema m\u00e1s r\u00e1pidamente.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-516eb92 elementor-widget elementor-widget-spacer\" data-id=\"516eb92\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c00e524 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c00e524\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-90e881e\" data-id=\"90e881e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3446f58 elementor-widget elementor-widget-video\" data-id=\"3446f58\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;youtube.com\\\/watch?v=O6yq7KzicVk&amp;source_ve_path=OTY3MTQ&amp;embeds_referring_euri=https%3A%2F%2Fhobertek.com%2F&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div 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comprobaciones de seguridad y la evidencia necesaria<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>","protected":false},"author":4,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"Solar Pump Troubleshooting Checklist | Technical Support Guide","_seopress_titles_desc":"Use this solar pump troubleshooting checklist to collect inverter, pump and PV system information, record test videos and help technical support diagnose faults 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