CauseA short circuit was detected at the PV input — the array wiring presents a near-zero-resistance path, so the input stage shut down.
Recommended fixCheck if wiring is connect well.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 27
Felicity T-REX-10KLP3G01 Error Codes: Causes & Fixes (48 codes)
This is the complete fault table for the Felicity T-REX-10KLP3G01 Inverter — all 48 codes from the official manual on one page. On Felicity units, a fault code means the unit has cut its output and the red LED stays solid; a warning flashes the red LED while the unit keeps running.
Last checked against the official manuals on July 10, 2026.
How to read the severity labels
- Critical(10)— unit trips offline — do not restart before checking
- Fault(32)— output stops · red LED solid
- Warning(6)— unit keeps running · red LED flashing
Critical codes (10)unit trips offline — do not restart before checking
CauseWiring fault or abnormal load on the output.
Recommended fixCheck if wiring is connected well and remove abnormal load.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 28
Inverter soft start failed.
CauseInternal components failed.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 28
CauseAC Surge or internal components failed.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 28
CauseInternal components failed.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 28
CauseGround leakage current above the safety limit was detected — insulation or grounding on the PV or AC side is letting current return outside the normal conductors.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 28
CauseA fault has been detected in the PV input stage — usually a short, ground fault, or isolation failure between the PV array and the inverter chassis. Wet connectors, damaged cable insulation, or moisture in a junction box are common causes.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 28
CauseThe inverter's ground check failed — the PE/earth connection is missing, high-impedance, or wired incorrectly, so protective earthing cannot be guaranteed.
Recommended fix1. Confirm correct grounding. 2. Restart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 29
CauseA read/write error occurred in the EEPROM that stores the inverter's settings and calibration, so the control board cannot reliably save or recall its configuration.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 29
CauseThe battery input circuit failed its self-check — the path between the battery terminals and the internal DC stage is not behaving as expected, which points to an internal fault rather than the battery itself.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 29
Fault codes (32)output stops · red LED solid
CausePV input voltage exceeds inverter limits (too many PV modules in series).
Recommended fixReduce the number of PV modules in series.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 27
CauseCurrent from the PV array exceeded the input stage's protection limit, so the inverter shut the PV input down.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 27
CauseBattery specification or quantity does not meet requirements.
Recommended fixCheck if spec and quantity of batteries are meet requirements.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 27
CauseCurrent into or out of the battery exceeded the protection limit — a charge or discharge surge beyond what the battery stage is rated for.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 27
CauseThe buck-boost converter stage drew current above its protection limit.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 27
CauseThe buck-boost stage failed to ramp to its working point during soft start — an internal converter fault rather than a wiring issue.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 27
CauseThe buck-boost current sensor returned an out-of-range or implausible reading, so the control board can no longer trust that stage's current measurement.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 27
CauseConnected load is too high.
Recommended fixReduce the connected load by switching off some equipment.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 28
CauseThe inverter's output current ran above the protection limit — an overload or surge on the connected loads, or a fault in the output stage's current control.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 28
Output current sensor failed.
CauseOutput current sensor failed.
Recommended fixOutput current sensor failed.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 28
CauseConnected load is too high.
Recommended fixReduce the connected load.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 28
CauseThe inverter measured its own AC output voltage above the permitted range — an internal regulation fault rather than a wiring issue.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 28
CauseThe control software measured a current or surge on the power stage beyond its protection limit. The software trip catches sustained overcurrent, as opposed to the instantaneous hardware trip of F25.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 28
CauseA hardware protection circuit tripped on overcurrent at the inverter port. It acts independently of the firmware and reacts to fast transients such as load inrush or a surge.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 28
CauseThe DC component riding on the inverter's output current exceeded the permitted limit — the output waveform has developed an asymmetry, typically from an output-stage or current-feedback fault.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 28
CauseThe inverter-stage current sensor returned an out-of-range or implausible reading, so the control board can no longer trust its inverter current measurement.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 28
CauseThe internal DC bus voltage fell below its operating range. The bus is regulated entirely inside the unit, so a persistent low reading points to an internal conversion-stage fault rather than external wiring.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 28
CauseThe positive and negative halves of the internal DC bus have drifted apart in voltage — an internal balancing fault in the conversion stages.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 28
CauseAmbient temperature is too high.
Recommended fixCheck whether the ambient temperature is too high.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 28
The inner temperature is too high.
CauseAmbient temperature is too high.
Recommended fixCheck whether the ambient temperature is too high.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 28
CauseThe leakage current sensor returned an out-of-range or implausible reading, so the inverter can no longer verify that its leakage protection is working.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 28
CauseA safety relay inside the inverter has failed self-test or is stuck. The inverter is designed to refuse grid connection in this state, so this is not an issue you can clear with restart cycles.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 29
CauseCommunication cables not connected well.
Recommended fix1. Check if communication cables are connected well and restart the inverter. 2. if the problem remains, please contact your installer.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 29
CauseCommunication cables not connected well.
Recommended fix1. Check if communication cables are connected well and restart the inverter. 2. if the problem remains, please contact your installer.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 29
CauseCommunication cables not connected well.
Recommended fix1. Check if communication cables are connected well and restart the inverter. 2. if the problem remains, please contact your installer.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 29
CauseInverter firmware versions are mismatched across parallel units.
Recommended fix1. Update all inverter firmware to the same version. 2. Check the version of each inverter via LCD setting and make sure the CPU versions are same. if not, please contact your installer to provide the firmware to update. 3. After updating, if the problem still remains, please contact your installer.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 29
CauseParallel inverter settings differ between units.
Recommended fix1. Through the LCD control button on the inverter, the parameters of the machine are set to the same as those of other machines. 2. if the problem persists, contact the after-sales service.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 29
CauseThe parallel bus detects an installation that does not form a valid group — wrong cabling topology or an inconsistent set of units — so the system will not start.
Recommended fixContact after-sales service for installation technical guidance.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 29
CauseOne unit in the parallel group was detected absorbing power from the others (negative power flow), which the protection treats as a load-sharing fault and shuts down.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 29
CauseCommunication has been lost between the inverter and a peripheral device — typically a battery BMS, smart meter, or external monitoring dongle.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 29
CauseCommunication has been lost between the inverter and a peripheral device — typically a battery BMS, smart meter, or external monitoring dongle.
Recommended fixRestart the unit, if the error persists, contact the repair center.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 29
CauseThe number of battery packs in series has not been set.
Recommended fixPlease set it correctly according to the number of battery packs used by the inverter.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 29
Warning codes (6)unit keeps running · red LED flashing
Low battery warning indicated on LCD with flashing fault LED.
CauseThe battery voltage is too low.
Recommended fixBattery should be charging.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 27
Overload warning. Audible alarm: beep twice every second.
CauseThe connected load exceeds the inverter's continuous output rating; the buzzer beeps twice every second and protection will cut the output if the overload is not reduced.
Recommended fixPower down the inverter, wait 5 minutes for capacitors to discharge, then restart. If the fault recurs immediately or repeatedly, record the exact code and contact your installer or the manufacturer's service line.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 27
BMS does not allow the inverter to discharge battery; inverter will stop discharging battery automatically.
CauseBMS doesn't allow inverter to discharge battery.
Recommended fixInverter will stop discharging battery automatically.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 27
BMS requires inverter to charge battery; inverter will charge battery automatically.
CauseBMS require inverter to charge battery.
Recommended fixInverter will charge battery automatically.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 27
CauseBMS firmware version is not matched.
Recommended fixUpgrade the firmware of BMS.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 27
CauseThe number of battery packs in series has not been set.
Recommended fixPlease set it correctly according to the number of battery packs used by the inverter.
Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf· page 27
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Keep troubleshooting
- All Felicity error codesSearch every device and code in the database
- Felicity Inverter Error Codes: Complete Guide for All ModelsThe step-by-step troubleshooting guide
- T-REX-10KLP3G01 product pageSpecs, datasheet and pricing
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Common questions about T-REX-10KLP3G01 error codes
- What is the difference between a fault and a warning on the T-REX-10KLP3G01?
- A fault cuts the unit's output and the red LED stays solid — this page lists 42 of them for the T-REX-10KLP3G01. A warning only flashes the red LED and the unit keeps running; there are 6 warning codes here. Resolve the cause of a fault before restarting; warnings can usually be cleared while the unit runs.
- Does this page apply to other Felicity models?
- No — this table was transcribed specifically from the T-REX-10KLP3G01 manual. Other Felicity devices have their own pages; start from the error-code hub to find the one matching the model number on your unit's label.
- Where do these codes come from?
- Every entry was transcribed from T-REX-10KLP3G01-Inverter-User-Guide.pdf — Felicity's official documentation. Each row cites its source manual (and page where printed), so you can verify the wording before acting on it.
Compiled from official Felicity user manuals. Always consult your device manual and a qualified technician before performing repairs.