Victron Error 17 fault: Phase master missing
Call a qualified installer
Urgency: medium
What it means
One of the units can't find the phase master. This is usually a communication cable or fuse problem for an installer.
Likely causes
- Communication cable problem
- Blown internal fuse
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.