IPV series (IPV-4K24U, IPV-6K48U, IPV-4K24U Pro, IPV-6K48U Pro, IPV-12K48U) — warning and fault code
Itel Energy 03 error code
Display code 03 covers two events: as a warning it signals the lower cooling fan is locked (three beeps); as a fault it signals that the DC bus soft-start sequence failed (solid fault LED).
Likely causes
- Lower fan obstructed by dust or debris
- Lower fan cable disconnected or fan seized
- Internal bus soft-start circuit fault
Checks to run, in order
- 1Note whether the fault LED is flashing (fan warning) or solid (bus fault)
- 2Power off and inspect the lower fan for obstruction and free rotation
- 3Check the lower fan connector on the control board
- 4Restart and note whether the code returns immediately at start-up
Fixes
- Clear the obstruction or reseat the fan cable
- Replace the lower fan if it does not spin
- Restart the unit and confirm that the code clears
When to escalate
A solid code 03 at every start-up points to the soft-start circuit; refer it to the distributor rather than repeated restarts.
Fix it with the right tools
Check the system around the fault before replacing parts: load, battery bank, PV string and commissioning settings. If you need a second opinion, send the code and your inverter model to our team.
Before you open the inverter
- Isolate both the AC and DC sides, then confirm the display is dead before touching terminals.
- Use insulated tools and one hand where possible. DC arcs do not self-extinguish like AC.
- If you see burnt terminals, swollen cells, leaking electrolyte or a burning smell, stop and escalate instead of resetting the fault.
Questions installers ask
What does Itel Energy 03 mean?
Display code 03 covers two events: as a warning it signals the lower cooling fan is locked (three beeps); as a fault it signals that the DC bus soft-start sequence failed (solid fault LED).
How do I fix Itel Energy 03?
Clear the obstruction or reseat the fan cable Replace the lower fan if it does not spin Restart the unit and confirm that the code clears
When should I escalate Itel Energy 03?
A solid code 03 at every start-up points to the soft-start circuit; refer it to the distributor rather than repeated restarts.
Can I reset Itel Energy 03 myself?
Only after isolating the AC and DC sides and running the checks above. If Itel Energy 03 returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show Itel Energy 03?
Itel Energy 03 is documented for IPV series (IPV-4K24U, IPV-6K48U, IPV-4K24U Pro, IPV-6K48U Pro, IPV-12K48U) — warning and fault code. Confirm the code on your own unit's display or manual before ordering parts.
More Itel Energy error codes
- Itel Energy 01Display code 01 covers two events: as a warning it signals output overload (flashing fault LED, two beeps per second); as a fault it signals DC bus over-voltage (solid fault LED, output switched off).
- Itel Energy 02Display code 02 covers two events: as a warning it signals the upper cooling fan is locked (three beeps); as a fault it signals DC bus under-voltage (solid fault LED, output switched off).
- Itel Energy 04Grid voltage is above the upper limit of the inverter's grid window; warning only, with no buzzer alarm.
- Itel Energy 05In a parallel system the AC outputs of the units are not connected together, or a unit is running on a different phase.
- Itel Energy 06Remote shutdown is enabled, typically from the monitoring app over Wi-Fi, so the inverter is being held off remotely.
- Itel Energy 07The load on the inverter's second AC output exceeds that output's rating; warning only, with no buzzer alarm.
Guidance reviewed 17 October 2026 by the Mishka Energy installer team. Error codes vary by brand, model family and firmware; confirm against the manufacturer manual.
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