Also applies to:Axpert MAX II TWIN 8KWAxpert MAX II TWIN 11KWAxpert MAX II TWIN 12KWAxpert MAX II Duplex 8KW+37
What it means
Fan is locked when inverter is off
Cause: Fan fault.
How to fix it
Replace the fan.
Source: Voltronic manual, p.47
Voltronic inverter error 01 (F1)
Also displayed as F1 on some models.
Fault — the inverter cuts its output and the red LED stays solid until the fault is cleared.
Also applies to:InfiniSolar V II 2KWInfiniSolar V II 3KWInfiniSolar V II 5KWInfiniSolar V II 1.5KW+8
What it means
Fan locked — Fault code 01 shown on the display with the fault icon on: Fan locked.
Cause: Fan fault.
How to fix it
Replace the fan.
Source: Voltronic manual, p.26
Also applies to:InfiniSolar V II 2P 6KW
What it means
Fan is locked — Fault code 01 shown on the display with the fault icon on: Fan is locked..
Cause: Fan fault.
How to fix it
Replace the fan.
Source: Voltronic manual, p.30
What it means
Bus voltage over — Fault code 01 shown on the display with the fault icon on: Bus voltage over.
Cause: Bus voltage over.
How to fix it
- Restart the unit.
- If the fault happens again, contact your installer or the repair centre.
Source: Voltronic manual, p.52
Also applies to:InfiniSolar 15KWInfiniSolar Super 4KWInfiniSolar Plus 5KWInfiniSolar TX-PA 30KW
What it means
Bus voltage over — Fault code 01 shown on the display with the fault icon on: Bus voltage over.
Cause: Surge.
How to fix it
- Restart the inverter
- If the error message still remains, please contact your installer.
Source: Voltronic manual, p.50
What it means
DC bus voltage exceeds the upper threshold — Fault code 01 shown on the display with the fault icon on: DC bus voltage exceeds the upper threshold.
Cause: DC bus voltage exceeds the upper threshold.
How to fix it
- Disconnect AC circuit breaker first.
- Then, disconnect DC circuit breaker.
- 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.
- If the error message still remains, please contact your installer.
- The internal temperature is higher than specified temperature.
- Leave inverter to cool down to room temperature.
- If the error message still remains, please contact your installer.
- Check if the open circuit voltage of PV modules is higher than 500VDC.
- If PV open circuit voltage is less than 500VDC and the error message remains, pelase contact your installer.
- Turn off the inverter.
- Then, restart the inverter.
- If the error message still remains, please contact your installer.
- The ground voltage is too high.
- Please disconnect AC breaker first and then DC breaker.
- Check if grounding is connected properly after LCD screen.
Source: Voltronic manual, p.43
Also applies to:InfiniSolar 2KWInfiniSolar 3KW
What it means
DC bus voltage exceeds the upper threshold — Fault code 01 shown on the display with the fault icon on: DC bus voltage exceeds the upper threshold.
Cause: DC bus voltage exceeds the upper threshold.
How to fix it
- Disconnect AC circuit breaker first. Then, disconnect DC circuit breaker
- 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
- If the error message still remains, please contact your installer.
Source: Voltronic manual, p.46
What it means
Input current is abnormal — Fault code 01 shown on the display with the fault icon on: Input current is abnormal..
Cause: Input current is abnormal.
How to fix it
- Restart the converter
- If the problem remains, please contact your installer.
Source: Voltronic manual, p.20
What it means
DC bus voltage exceeds the upper threshold — Fault code 01 shown on the display with the fault icon on: DC bus voltage exceeds the upper threshold..
Cause: DC bus voltage exceeds the upper threshold.
How to fix it
- Disconnect AC circuit breaker first.
- Then, disconnect DC circuit breaker.
- 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.
- If the error message still remains, please contact your installer.
Source: Voltronic manual, p.68
Also applies to:Galleon II 6KGalleon II 10KGiant Elite 1P/1P 6K-10KWinner Pro 6KVA+1
What it means
Bus start failure — Fault code 01 shown on the display; the UPS has detected a fault condition: Bus start failure.
Cause: Bus start failure.
How to fix it
- Restart the unit.
- If the fault happens again, contact your installer or the repair centre.
Source: Voltronic manual, p.29
Also applies to:Galleon III 1KGalleon III 2KGalleon III 3KWinner Pro 1KVA-3KVA+5
What it means
Bus start fail — Fault code 01 shown on the display; the UPS has detected a fault condition: Bus start fail.
Cause: Bus start fail.
How to fix it
- Restart the unit.
- If the fault happens again, contact your installer or the repair centre.
Source: Voltronic manual, p.31
Also applies to:Galleon X9 6K RTGalleon X9 10K RT
What it means
Bus Start Fail — Fault code 01 shown on the display; the UPS has detected a fault condition: Bus Start Fail.
Cause: The internal converter failed, so the DC bus voltage could not be boosted correctly.
How to fix it
Contact the dealer to repair.
Source: Voltronic manual, p.28
Also applies to:Giant Elite 3P/3P 10K-40KVA
What it means
Firmware incompatibility — Fault code 01 shown on the display; the UPS has detected a fault condition: Firmware incompatibility.
Cause: Firmware incompatibility.
How to fix it
- Restart the unit.
- If the fault happens again, contact your installer or the repair centre.
Source: Voltronic manual, p.41
Also applies to:SCC-MPPT 300WSCC-MPPT 600WSCC-MPPT 850W
What it means
Battery wires are not connected well, battery defect, or charge controller defect — Fault code F1 shown on the display with the fault icon on: Battery wires are not connected well, battery defect, or charge controller defect..
Cause: Battery wires are not connected well. Battery defect. Charge controller defect.
How to fix it
- Check if battery wires are properly connected.
- Replace battery.
- If the charge controller is defective, replace the unit.
Source: Voltronic manual, p.6
Models that show 01
Voltronic Solar Charge Controller Axpert MAX 3.6KW
- DC Offset
- ≤100mV
- Rated Output Power
- 3600W
- Peak Efficiency
- 91%
Price incl. VATAED 917
Voltronic Solar Charge Controller Axpert MAX 6.5KW
- DC Offset
- ≤100mV
- Rated Output Power
- 6500W
- Peak Efficiency
- 91%
Price incl. VATAED 1,482
Voltronic Solar Charge Controller Axpert MAX 7.2KW
- DC Offset
- ≤100mV
- Rated Output Power
- 7200W
- Peak Efficiency
- 93%
Price incl. VATAED 1,585
Voltronic Solar Charge Controller Axpert KING II TWIN 6.2KW
- Input Voltage Waveform
- Sinusoidal
- Nominal Input Voltage
- 230Vac
- Low Loss Voltage
- 176Vac±7V
Price incl. VATAED 1,438
Voltronic Solar Charge Controller Axpert KING II TWIN 6KW
- Input Voltage Waveform
- Sinusoidal
- Nominal Input Voltage
- 230Vac
- Low Loss Voltage
- 176Vac±7V
Price incl. VATAED 1,395
Voltronic Hybrid Solar Inverter Axpert KING 3KW
- Rated Output Power
- 3KVA/3KW
- Surge Capacity
- 2* rated power
- Nominal DC Input Voltage
- 24Vdc
Price incl. VATAED 844
Frequently asked questions
What does error 01 mean on a Voltronic inverter?
It depends on the model — 49 devices use code 01. On the Axpert MAX II TWIN it means: Fan is locked when inverter is off. The card for each model on this page gives its exact meaning and fix.
Is error 01 a fault or a warning?
01 is a fault code: the inverter cuts its output and the red LED stays solid until it is cleared.
How do I clear or fix error 01?
Replace the fan. The exact steps for each affected model are listed on this page.
Related error codes
Other codes on the Axpert MAX II TWIN
01 is in the "Fault" class on the Axpert MAX II TWIN: 29 of the 38 codes documented for it.
- 02FaultOver temperature
- 03FaultBattery voltage is too high
- 05FaultOutput short circuited
- 11FaultPV over voltage
- 10FaultPV over current
- 06FaultOutput voltage is too high
All Axpert MAX II TWIN codes All Axpert MAX II Duplex codes All Axpert MAX II codes All Axpert MAX TWIN codes All Axpert MAX E TWIN codes All Axpert MAX E Duplex codes All Axpert MAX codes All Axpert KING II TWIN codes All Axpert KING codes All Axpert MKS IV TWIN codes All Axpert MKS IV codes All Axpert MKS III TWIN codes All Axpert MKS II codes All Axpert VM II codes All Axpert VM II (PF1) codes All Axpert VM III codes All Axpert VM IV TWIN (VM4 TWIN) codes All Axpert KS codes All Axpert V (PF1) codes All Axpert WP TWIN codes All Axpert 3KP/5KP 24V codes All ESS-A510 codes All Galleon One 5KL 48V codes
Other codes on the InfiniSolar V II
01 is in the "Fault" class on the InfiniSolar V II: 29 of the 37 codes documented for it.
- 02FaultOver temperature
- 03FaultBattery voltage is too high
- 05FaultOutput short circuited
- 11FaultPV voltage over
- 10FaultPV current over
- 06FaultOutput voltage abnormal
All InfiniSolar V II codes All InfiniSolar V II 1.5KW codes All InfiniSolar V II WP codes All InfiniSolar V codes
Other codes on the InfiniSolar V II 6KW (Split Phase)
01 is in the "Fault" class on the InfiniSolar V II 6KW (Split Phase): 28 of the 36 codes documented for it.
Other codes on the InfiniSolar WP LV 12KW Premium
01 is in the "Fault" class on the InfiniSolar WP LV 12KW Premium: 16 of the 35 codes documented for it.
Other codes on the InfiniSolar 10KW
01 is in the "Fault" class on the InfiniSolar 10KW: 23 of the 40 codes documented for it.
- 05FaultINV over current
- 11FaultSolar over current
- 02FaultBUS voltage under
- 34FaultINV voltage high
- 27FaultFan lock
- 03FaultBUS soft start time out
All InfiniSolar 10KW codes All InfiniSolar 15KW codes All InfiniSolar Super 4KW codes All InfiniSolar Plus 5KW codes All InfiniSolar TX-PA 30KW codes
Other codes on the InfiniSolar E 5.5KW
01 is in the "Fault" class on the InfiniSolar E 5.5KW: 29 of the 34 codes documented for it.
Compiled from official Voltronic user manuals. Always consult your device manual and a qualified technician before performing repairs.