Axpert Fault 55 fault: Output voltage unbalanced
Call a qualified installer
Urgency: high
What it means
The inverter's output is unbalanced, which is an internal fault for an installer.
Likely causes
- Internal fault
Don't try to fix this yourself
When to call a pro
Call a qualified installer now. Switch off heavy loads and don't try to repair anything yourself.
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.