Victron Error 3 fault: Devices missing or unexpected
Call a qualified installer
Urgency: medium
What it means
The system found fewer or more devices than it expected. It often follows Error 1, but needs an installer to check the setup.
Likely causes
- Follows an Error 1 shutdown
- Configuration or communication problem
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.