Victron Error 5 fault: AC output overvoltage
Call a qualified installer
Urgency: high
What it means
The unit measured too high a voltage on its AC output, which usually points to a wiring problem. Switch off loads and call a pro.
Likely causes
- AC wiring problem
- Incorrect installation
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: Victron Energy – VE.Bus Error Codes (paraphrased)
Victron advises that this work be done by trained professionals.