IE:00036 on a SolaX Power SolaX X1-Mini G4: InternalComFault - Internal Communication Fault
Short answer
On a SolaX Power inverter, IE:00036 means: InternalComFault - Internal Communication Fault. The inverter stops until the fault clears or is reset. An engineer is needed to fix the cause.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: InternalComFault - Internal Communication Fault.
Part involved: Inverter internal hardware / firmware.
Likely causes:
- Internal comms; firmware.
Is it safe?
| Does the inverter stop? | Yes |
|---|---|
| Severity | Fault — needs a manual reset once the cause is fixed |
| Engineer needed? | Yes |
The inverter stops until the fault clears or is reset.
Resetting itself: sometimes clears after a restart; recurring = hardware fault.
Manual reset: restart; otherwise replacement.
What you can check
- Read and note the exact code and time from the inverter display or app (screenshot).
- Check the solar/battery AC isolator and the consumer-unit breaker/RCD are ON (do not reset a breaker that trips again immediately).
- Where the SolaX manual says 'press the ESC key to restart the inverter', a homeowner can do that on the display. Steps that say 'disconnect PV+/PV-/battery' are for the installer only.
What the engineer will check
- Restart per manual.
- Update firmware.
- Contact manufacturer support with serial number; RMA if repeated.
Who to ask for: PV installer with manufacturer support access.
Certification: Electrician competent in grid-connected PV (BS 7671 Section 712; IET Code of Practice for Grid-connected Solar PV), ideally the original MCS-certified PV installer; brand-approved/trained installer to keep manufacturer warranty.
What you might notice
Sources
- X1-MINI G4 User Manual Version 9.0 (Version 09, 30 Jun 2026) ↗ · 9.0 · page PDF p.98 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026