IPV series (IPV-4K24U, IPV-6K48U, IPV-4K24U Pro, IPV-6K48U Pro, IPV-12K48U) — inverter fault code
Itel Energy 31 error code
Over-current occurred in the DC/DC converter circuit.
Likely causes
- Battery-side current above the DC/DC converter limit
- Battery short circuit or reversed polarity
- Internal DC/DC power-stage fault
Checks to run, in order
- 1Check battery polarity and terminal tightness
- 2Check the battery cable and breaker for a short circuit
- 3Read the battery charge/discharge current on the LCD
- 4Restart once and note whether the code returns under charge or discharge
Fixes
- Correct battery polarity or wiring
- Reduce the charge/discharge current and restart
- If the fault returns, return the unit for service
When to escalate
If code 31 returns at normal battery current with correct polarity, escalate for DC/DC converter service.
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 31 mean?
Over-current occurred in the DC/DC converter circuit.
How do I fix Itel Energy 31?
Correct battery polarity or wiring Reduce the charge/discharge current and restart If the fault returns, return the unit for service
When should I escalate Itel Energy 31?
If code 31 returns at normal battery current with correct polarity, escalate for DC/DC converter service.
Can I reset Itel Energy 31 myself?
Only after isolating the AC and DC sides and running the checks above. If Itel Energy 31 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 31?
Itel Energy 31 is documented for IPV series (IPV-4K24U, IPV-6K48U, IPV-4K24U Pro, IPV-6K48U Pro, IPV-12K48U) — inverter 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 03Display 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).
- 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.
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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