02Fault

Voltronic inverter error 02 (F2)

Over temperature

Also displayed as F2 on some models.

Fault — the inverter cuts its output and the red LED stays solid until the fault is cleared.

The exact meaning depends on your model:

Axpert MAX II TWIN

InverterFault

Also applies to:Axpert MAX II TWIN 8KWAxpert MAX II TWIN 11KWAxpert MAX II TWIN 12KWAxpert MAX II Duplex 8KWAxpert MAX II Duplex 11KWAxpert MAX II 8KWAxpert MAX II 11KWAxpert KING II TWIN 6KW+15

What it means

Over temperature — Fault code 02 shown on the display with the fault icon on: Over temperature.

Cause: Internal temperature of inverter component is over 100°C.

How to fix it

Check whether the air flow of the unit is blocked or whether the ambient temperature is too high.

Source: Axpert-MAXII-8K-TWIN-Off-grid-manual.pdf, p.47 · Axpert-MAXII-8K-TWIN-Off-grid-manual.pdf, p.55 · Axpert-MAXII-11K-TWIN-Off-grid-manual.pdf, p.47 · +25 more official manuals

Axpert MAX TWIN

InverterFault

Also applies to:Axpert MAX 8K TWIN PV11KAxpert MAX E TWIN 11KWAxpert MAX E 11K DuplexAxpert MAX 3.6KWAxpert MAX 6.5KWAxpert MAX 7.2KWAxpert MKS III TWIN 6KWAxpert MKS II 5KVA+17

What it means

Over temperature — Fault code 02 shown on the display with the fault icon on: Over temperature.

Cause: Internal temperature of inverter component is over 100°C.

How to fix it

Return to repair center.

Source: Axpert-MAX-8K-TWIN-Off-grid-manual-20220121.pdf, p.39 · Axpert-MAX-8K-TWIN-Off-grid-manual-20220121.pdf, p.46 · Axpert-MAX-E-TWIN-11K-Off-grid-manual-20220121.pdf, p.40 · +23 more official manuals

Axpert VM II

InverterFault

Also applies to:Axpert VM II 1.2KVAAxpert VM II 2.5KVAAxpert VM II Plus 3KAxpert VM II 3KVA PF1Axpert VM II 5KVA PF1

What it means

Over temperature or NTC is not connected well — Fault code 02 shown on the display with the fault icon on: Over temperature or NTC is not connected well..

Cause: Internal temperature of inverter component is over 100°C.

How to fix it

Return to repair center.

Source: Axpert-VM-II-1.2KVA-2.5KVA_Plus-3K_manual.pdf, p.29 · Axpert-VM-II-1.2KVA-2.5KVA_Plus-3K_manual.pdf, p.33 · Axpert-VM-II-PF1-USB-dry-contact-100A_manual.pdf, p.28 · +1 more official manuals

InfiniSolar WP LV 12KW Premium

InverterFault

What it means

BUS voltage under — Fault code 02 shown on the display with the fault icon on: BUS voltage under.

Cause: BUS voltage under.

How to fix it

  1. Restart the unit.
  2. If the fault happens again, contact your installer or the repair centre.

Source: InfiniSolar-WP-LV-12KW-Premium-manual.pdf, p.52

InfiniSolar 10KW

InverterFault

Also applies to:InfiniSolar 15KWInfiniSolar Super 4KWInfiniSolar Plus 5KWInfiniSolar TX-PA 30KW

What it means

BUS voltage under — Fault code 02 shown on the display with the fault icon on: BUS voltage under.

Cause: PV or battery disconnect suddenly.

How to fix it

1. Restart the inverter 2. If the error message still remains, please contact your installer.

Source: InfiniSolar-10KW-manual-20191126.pdf, p.50 · InfiniSolar-15K-manual-20200313.pdf, p.51 · InfiniSolar-Super-4KW-manual.pdf, p.47 · +2 more official manuals

InfiniSolar E 5.5KW

InverterFault

What it means

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

Cause: DC bus voltage falls below the lower threshold.

How to fix it

  1. Disconnect AC circuit breaker first.
  2. Then, disconnect DC circuit breaker.
  3. Until LCD screen completely shuts down, turn on DC breaker first.
  4. It will show "No Utility" in LCD screen.
  5. Then, turn on AC breaker.
  6. After 300 seconds, the system will automatically connect to the grid.
  7. If the error message still remains, please contact your installer.
  8. The internal temperature is higher than specified temperature.
  9. Leave inverter to cool down to room temperature.
  10. If the error message still remains, please contact your installer.
  11. Check if the open circuit voltage of PV modules is higher than 500VDC.
  12. If PV open circuit voltage is less than 500VDC and the error message remains, pelase contact your installer.
  13. Turn off the inverter.
  14. Then, restart the inverter.
  15. If the error message still remains, please contact your installer.
  16. The ground voltage is too high.
  17. Please disconnect AC breaker first and then DC breaker.
  18. Check if grounding is connected properly after LCD screen.

Source: InfiniSolarE-5.5KW-manual.pdf, p.43

InfiniSolar 2KW/3KW

InverterFault

Also applies to:InfiniSolar 2KWInfiniSolar 3KW

What it means

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

Cause: DC bus voltage falls below the lower threshold.

How to fix it

  1. 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, p.46

DC Converter 3KW

InverterFault

What it means

Battery current is abnormal — Fault code 02 shown on the display with the fault icon on: Battery current is abnormal..

Cause: Battery current is abnormal.

How to fix it

  1. Restart the converter
  2. If the problem remains, please contact your installer.

Source: DC-converter-3KW-manual.pdf, p.20 · DC-converter-3KW-manual.pdf, p.21

ESS510

Energy storage systemFault

What it means

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

Cause: DC bus voltage falls below the lower threshold.

How to fix it

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

Source: ESS510-manual.pdf, p.68

Galleon II 6K-10K

upsFault

Also applies to:Galleon II 6KGalleon II 10KGalleon III 1KGalleon III 2KGalleon III 3KGiant Elite 1P/1P 6K-10KWinner Pro 1KVA-3KVAWinner Pro 6KVA+6

What it means

Bus over — Fault code 02 shown on the display; the UPS has detected a fault condition: Bus over.

Cause: Bus over.

How to fix it

  1. Restart the unit.
  2. If the fault happens again, contact your installer or the repair centre.

Source: GalleonII-6-10K-Tower-RT-manual.pdf, p.29 · Galleon-III-Tower-Rack-1-3K-manual.pdf, p.31 · Giant-Elite-1P-1P_manual.pdf, p.26 · +5 more official manuals

Galleon One 5KL 48V

upsFault

What it means

Over temperature — Fault code 02 shown on the display; the UPS has detected a fault condition: Over temperature.

Cause: Internal temperature of UPS component is over 100°C.

How to fix it

Check whether the air flow of the unit is blocked or whether the ambient temperature is too high.

Source: GalleonOne-5KL-48V-manual.pdf, p.22 · GalleonOne-5KL-48V-manual.pdf, p.28

Galleon X9 6K-10K RT

upsFault

Also applies to:Galleon X9 6K RTGalleon X9 10K RT

What it means

Bus Over — Fault code 02 shown on the display; the UPS has detected a fault condition: Bus Over.

Cause: 1) DC bus voltage is too high because of mains input or load transient current. 2) The internal converter failed.

How to fix it

  1. Shut down and restart the system to see if it happens again
  2. Contact the dealer to repair.

Source: Galleon-X9-6-10K-RT_manual.pdf, p.28

Giant Elite 3P/3P

upsFault

Also applies to:Giant Elite 3P/3P 10K-40KVA

What it means

NO Boot Loader — Fault code 02 shown on the display; the UPS has detected a fault condition: NO Boot Loader.

Cause: NO Boot Loader.

How to fix it

  1. Restart the unit.
  2. If the fault happens again, contact your installer or the repair centre.

Source: Giant-Elite-3P3P-manual.pdf, p.41

SCC-MPPT Solar Charge Controller

Charge controllerFault

Also applies to:SCC-MPPT 300WSCC-MPPT 600WSCC-MPPT 850W

What it means

Overload — Fault code F2 shown on the display with the fault icon on: Overload..

Cause: Overload.

How to fix it

Remove excess loads.

Source: SCC-MPPT_manual.pdf, p.6

Frequently asked questions

What does error 02 mean on a Voltronic inverter?
It depends on the model — 49 devices use code 02. On the Axpert MAX II TWIN it means: Over temperature. The card for each model on this page gives its exact meaning and fix.
Is error 02 a fault or a warning?
02 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 02?
Check whether the air flow of the unit is blocked or whether the ambient temperature is too high. The exact steps for each affected model are listed on this page.

Related error codes

Other codes on the Axpert MAX II TWIN

All Axpert MAX II TWIN codes All Axpert MAX II Duplex codes All Axpert MAX II codes All Axpert KING II TWIN codes All Axpert KING codes All Axpert MKS IV TWIN codes All Axpert MKS IV codes All Axpert VM IV TWIN (VM4 TWIN) codes All Axpert WP TWIN codes All Axpert 3KP/5KP 24V codes All InfiniSolar V II WP codes All ESS-A510 codes

Other codes on the Axpert MAX TWIN

All Axpert MAX TWIN codes All Axpert MAX E TWIN codes All Axpert MAX E Duplex codes All Axpert MAX codes All Axpert MKS III TWIN codes All Axpert MKS II codes All Axpert VM III codes All Axpert KS codes All Axpert V (PF1) codes All InfiniSolar V II codes All InfiniSolar V II 1.5KW codes All InfiniSolar V II 6KW (Split Phase) codes All InfiniSolar V codes

Other codes on the Axpert VM II

All Axpert VM II codes All Axpert VM II (PF1) codes

Other codes on the InfiniSolar WP LV 12KW Premium

All InfiniSolar WP LV 12KW Premium codes

Other codes on the InfiniSolar 10KW

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

All InfiniSolar E 5.5KW codes

Compiled from official Voltronic user manuals. Always consult your device manual and a qualified technician before performing repairs.