Voltronic InfiniSolar 2KW/3KW Error Codes: Causes & Fixes (29 codes)

This is the complete fault table for the Voltronic InfiniSolar 2KW/3KW Inverter family — 29 codes shared by 2 model numbers, transcribed from the official manual. On Voltronic 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.

Also coversInfiniSolar 2KWInfiniSolar 3KW

Last checked against the official manuals on July 27, 2026.

How to read the severity labels

  • Fault(29)— output stops · red LED solid

Fault codes (29)output stops · red LED solid

01Fault

DC bus voltage exceeds the upper threshold.

Fault

Fault code 01 shown on the display with the fault icon on: DC bus voltage exceeds the upper threshold.

CauseDC bus voltage exceeds the upper threshold.

Recommended fix1. Disconnect AC circuit breaker first. Then, disconnect DC circuit breaker. 2. Until LCD screen completely shuts down, turn on DC breaker first. It will show "No Utility" in LCD screen. Then, turn on AC breaker. After 300 seconds, the system will automatically connect to the grid. 3. If the error message still remains, please contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 46

02Fault

DC bus voltage falls below the lower threshold.

Fault

Fault code 02 shown on the display with the fault icon on: DC bus voltage falls below the lower threshold.

CauseDC bus voltage falls below the lower threshold.

Recommended fix1. Disconnect AC circuit breaker first. Then, disconnect DC circuit breaker. 2. Until LCD screen completely shuts down, turn on DC breaker first. It will show "No Utility" in LCD screen. Then, turn on AC breaker. After 300 seconds, the system will automatically connect to the grid. 3. If the error message still remains, please contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 46

03Fault

DC bust voltage soft-start is time-out.

Fault

Fault code 03 shown on the display with the fault icon on: DC bust voltage soft-start is time-out.

CauseDC bust voltage soft-start is time-out.

Recommended fix1. Disconnect AC circuit breaker first. Then, disconnect DC circuit breaker. 2. Until LCD screen completely shuts down, turn on DC breaker first. It will show "No Utility" in LCD screen. Then, turn on AC breaker. After 300 seconds, the system will automatically connect to the grid. 3. If the error message still remains, please contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 46

04Fault

Inverter soft-start is time-out.

Fault

Fault code 04 shown on the display with the fault icon on: Inverter soft-start is time-out.

CauseInverter soft-start is time-out.

Recommended fix1. Disconnect AC circuit breaker first. Then, disconnect DC circuit breaker. 2. Until LCD screen completely shuts down, turn on DC breaker first. It will show "No Utility" in LCD screen. Then, turn on AC breaker. After 300 seconds, the system will automatically connect to the grid. 3. If the error message still remains, please contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 46

05Fault

An Inverter overcurrent event is detected.

Fault

Fault code 05 shown on the display with the fault icon on: An Inverter overcurrent event is detected.

CauseAn Inverter overcurrent event is detected.

Recommended fix1. Disconnect AC circuit breaker first. Then, disconnect DC circuit breaker. 2. Until LCD screen completely shuts down, turn on DC breaker first. It will show "No Utility" in LCD screen. Then, turn on AC breaker. After 300 seconds, the system will automatically connect to the grid. 3. If the error message still remains, please contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 46

06Fault

Over temperature fault.

Fault

Fault code 06 shown on the display with the fault icon on: Over temperature fault.

CauseOver temperature fault.

Recommended fix1. The internal temperature is higher than specified temperature. 2. Leave inverter to be cooled to room temperature. 3. If the error message still remains, please contact.

Source:InfiniSolar-2KW3KW-manual.pdf· page 46

07Fault

An relay failure event is detected.

Fault

Fault code 07 shown on the display with the fault icon on: An relay failure event is detected.

CauseAn relay failure event is detected.

Recommended fix1. Disconnect AC circuit breaker first. Then, disconnect DC circuit breaker. 2. Until LCD screen completely shuts down, turn on DC breaker first. It will show "No Utility" in LCD screen. Then, turn on AC breaker. After 300 seconds, the system will automatically connect to the grid. 3. If the error message still remains, please contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 46

08Fault

DC component in the output current exceeds the upper threshold.

Fault

Fault code 08 shown on the display with the fault icon on: DC component in the output current exceeds the upper threshold.

CauseDC component in the output current exceeds the upper threshold.

Recommended fix1. Disconnect AC circuit breaker first. Then, disconnect DC circuit breaker. 2. Until LCD screen completely shuts down, turn on DC breaker first. It will show "No Utility" in LCD screen. Then, turn on AC breaker. After 300 seconds, the system will automatically connect to the grid. 3. If the error message still remains, please contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 46

09Fault

PV input voltage exceeds the upper threshold.

Fault

Fault code 09 shown on the display with the fault icon on: PV input voltage exceeds the upper threshold.

CausePV input voltage exceeds the upper threshold.

Recommended fix1. Check if the open circuit voltage of PV modules is higher than 500VDC. 2. If PV open circuit voltage is less than 500VDC and the error message remains, pelase contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 47

10Fault

Auxiliary power* failed *Auxiliary power means switch power supply.

Fault

Fault code 10 shown on the display with the fault icon on: Auxiliary power* failed *Auxiliary power means switch power supply..

CauseAuxiliary power* failed *Auxiliary power means switch power supply.

Recommended fix1. Turn off the inverter. 2. Then, restart the inverter. 3. If the error message still remains, please contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 47

11Fault

Over-current on PV input is detected.

Fault

Fault code 11 shown on the display with the fault icon on: Over-current on PV input is detected.

CauseOver-current on PV input is detected.

Recommended fix1. Disconnect AC circuit breaker first. Then, disconnect DC circuit breaker. 2. Until LCD screen completely shuts down, turn on DC breaker first. It will show "No Utility" in LCD screen. Then, turn on AC breaker. After 300 seconds, the system will automatically connect to the grid. 3. If the error message still remains, please contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 46

12Fault

Leakage current exceeds the allowable range.

Fault

Fault code 12 shown on the display with the fault icon on: Leakage current exceeds the allowable range.

CauseLeakage current exceeds the allowable range.

Recommended fix1. The ground voltage is too high. 2. Please disconnect AC breaker first and then DC breaker. Check if grounding is connected properly after LCD screen completely shuts down. 3. If grounding is correctly connected, turn on DC brearker. After it displays "No Utility" in LCD screen, turn on AC breaker. After 300 seconds, the system will automatically connect to the grid. 4. If the error message still remains, please contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 47

13Fault

PV insulation resistance is too low.

Fault

Fault code 13 shown on the display with the fault icon on: PV insulation resistance is too low.

CausePV insulation resistance is too low.

Recommended fix1. Check if the impedance between positive and negative poles to the ground is greater than 1MΩ. 2. If the impedance is lower than 1MΩ, please contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 47

14Fault

Inverter DC component exceeds the allowable range.

Fault

Fault code 14 shown on the display with the fault icon on: Inverter DC component exceeds the allowable range.

CauseInverter DC component exceeds the allowable range.

Recommended fix1. Disconnect AC circuit breaker first. Then, disconnect DC circuit breaker. 2. Until LCD screen completely shuts down, turn on DC breaker first. It will show "No Utility" in LCD screen. Then, turn on AC breaker. After 300 seconds, the system will automatically connect to the grid. 3. If the error message still remains, please contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 46

15Fault

A difference occurred in the readings from the main and secondary controllers.

Fault

Fault code 15 shown on the display with the fault icon on: A difference occurred in the readings from the main and secondary controllers.

CauseA difference occurred in the readings from the main and secondary controllers.

Recommended fix1. Please disconnect AC breaker first and then disconnect DC breaker. 2. After LCD screen is completely off, turn on DC breaker. Until it shows "No Utility" in LCD display, turn on AC breaker. After 300 seconds, the system will automatically connect to the grid. 3. If error message remains, please contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 47

16Fault

Leakage current CT failed.

Fault

Fault code 16 shown on the display with the fault icon on: Leakage current CT failed.

CauseLeakage current CT failed.

Recommended fix1. Disconnect AC circuit breaker first. Then, disconnect DC circuit breaker. 2. Until LCD screen completely shuts down, turn on DC breaker first. It will show "No Utility" in LCD screen. Then, turn on AC breaker. After 300 seconds, the system will automatically connect to the grid. 3. If the error message still remains, please contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 46

17Fault

Communication with the main and secondary controllers is interrupted.

Fault

Fault code 17 shown on the display with the fault icon on: Communication with the main and secondary controllers is interrupted.

CauseCommunication with the main and secondary controllers is interrupted.

Recommended fix1. Please disconnect AC breaker first and then disconnect DC breaker. 2. After LCD screen is completely off, turn on DC breaker. Until it shows "No Utility" in LCD display, turn on AC breaker. After 300 seconds, the system will automatically connect to the grid. 3. If error message remains, please contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 48

20Fault

Discharge circuit fault.

Fault

Fault code 20 shown on the display with the fault icon on: Discharge circuit fault.

CauseDischarge circuit fault.

Recommended fix1. Please disconnect AC breaker first and then disconnect DC breaker. 2. After LCD screen is completely off, turn on DC breaker. Until it shows "No Utility" in LCD display, turn on AC breaker. After 300 seconds, the system will automatically connect to the grid. 3. If error message remains, please contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 48

21Fault

Soft start in battery discharge fails.

Fault

Fault code 21 shown on the display with the fault icon on: Soft start in battery discharge fails.

CauseSoft start in battery discharge fails.

Recommended fix1. Please disconnect AC breaker first and then disconnect DC breaker. 2. After LCD screen is completely off, turn on DC breaker. Until it shows "No Utility" in LCD display, turn on AC breaker. After 300 seconds, the system will automatically connect to the grid. 3. If error message remains, please contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 48

22Fault

Charging voltage is too high.

Fault

Fault code 22 shown on the display with the fault icon on: Charging voltage is too high.

CauseCharging voltage is too high.

Recommended fix1. Check if the connection between battery and inverter is well. 2. Make sure battery condition is ok. 3. Then, restart the inverter. 4. If error message remains, please contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 48

23Fault

Overload fault.

Fault

Fault code 23 shown on the display with the fault icon on: Overload fault.

CauseOverload fault.

Recommended fix1. Remove exessive loads. Be sure that total connected loads are less than maximum power consumption this inverter can support. 2. Then, restart the inverter.

Source:InfiniSolar-2KW3KW-manual.pdf· page 48

24Fault

Battery disconnected.

Fault

Fault code 24 shown on the display with the fault icon on: Battery disconnected.

CauseBattery disconnected.

Recommended fix1. Check if battery cable is connected firmly. 2. If error message remains, please contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 48

25Fault

Inverter current is too high for a long time.

Fault

Fault code 25 shown on the display with the fault icon on: Inverter current is too high for a long time.

CauseInverter current is too high for a long time.

Recommended fix1. Remove exessive loads. 2. Then, restart the inverter.

Source:InfiniSolar-2KW3KW-manual.pdf· page 48

26Fault

Short circuited on inverter output.

Fault

Fault code 26 shown on the display with the fault icon on: Short circuited on inverter output.

CauseShort circuited on inverter output.

Recommended fix1. Turn off the inverter. 2. Disconnect AC circuit breaker first. Then, disconnect DC circuit breaker and then disconnect the loads. 3. Please check if load circuit is ok. After removing the.

Source:InfiniSolar-2KW3KW-manual.pdf· page 48

27Fault

Fan fault.

Fault

Fault code 27 shown on the display with the fault icon on: Fan fault.

CauseFan fault.

Recommended fix1. Please check if fans are runing ok. 2. If fans are runing ok, please shut down inverter first and then, restart it. 3. If fans are stop runing or error message remains after restart the inverter, please contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 49

28Fault

OP Current Sensor fault.

Fault

Fault code 28 shown on the display with the fault icon on: OP Current Sensor fault.

CauseOP Current Sensor fault.

Recommended fix1. Shut down the inverter completely. 2. Restart the inverter to see if it's ok. 3. If error message still remains, please contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 49

29Fault

Charger failure.

Fault

Fault code 29 shown on the display with the fault icon on: Charger failure.

CauseCharger failure.

Recommended fix1. Shut down the inverter completely. 2. Restart the inverter to see if it's ok. 3. If error message still remains, please contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 49

30Fault

Version mismatch between controller board and power board.

Fault

Fault code 30 shown on the display with the fault icon on: Version mismatch between controller board and power board.

CauseVersion mismatch between controller board and power board.

Recommended fix1. Shut down the inverter completely. 2. Restart the inverter to see if it's ok. 3. If error message still remains, please contact your installer.

Source:InfiniSolar-2KW3KW-manual.pdf· page 49

31Fault

Reverse connection of input and output wires.

Fault

Fault code 31 shown on the display with the fault icon on: Reverse connection of input and output wires.

CauseReverse connection of input and output wires.

Recommended fix1. Shut down the inverter completely. 2. Check if grid wires are connected to AC output terminals.

Source:InfiniSolar-2KW3KW-manual.pdf· page 49

Still seeing a code on your InfiniSolar 2KW/3KW?

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Common questions about InfiniSolar 2KW/3KW error codes

What is the difference between a fault and a warning on the InfiniSolar 2KW/3KW?
A fault cuts the unit's output and the red LED stays solid — this page lists 29 of them for the InfiniSolar 2KW/3KW. The InfiniSolar 2KW/3KW manual defines no separate warning table — every listed code stops operation. Resolve the cause of a fault before restarting; warnings can usually be cleared while the unit runs.
Which model numbers does this page cover?
The InfiniSolar 2KW/3KW shares its firmware and fault table with 1 other model number: InfiniSolar 2KW, InfiniSolar 3KW. If your unit is any of these, every code on this page applies to it.
Where do these codes come from?
Every entry was transcribed from InfiniSolar-2KW3KW-manual.pdf — Voltronic'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 Voltronic user manuals. Always consult your device manual and a qualified technician before performing repairs.