Axpert Fault 02 fault: Over-temperature
Safe to check yourself
Urgency: medium
What it means
The inverter is running too hot inside and will reduce power or shut down to protect itself. Better airflow and a cooler spot usually solve it.
Likely causes
- Blocked vents
- Hot room or direct sun on the unit
- Heavy loads on a hot day
What you can safely check
- Make sure the vents around the unit are clear and nothing is stacked against it.
- Check the room or garage temperature and improve shade or ventilation if it is very hot.
- If it keeps coming back, stop and call a qualified installer.
When to call a pro
If the safe checks don't clear it, or it keeps coming back, call a qualified installer.
Solar systems carry dangerous voltages. Only do the safe checks listed. If unsure, call a pro.
Source: Voltronic Power 1.5KW/3KW/5KW Solar Inverter/Charger User Manual v1.8 (Axpert VM III) (paraphrased)
Axpert-type inverters are sold under many names; codes can differ slightly by model.