Sunsynk F63 fault: Arc fault
Call a qualified installer
Urgency: high
What it means
The inverter detected electrical arcing on the solar side, which is a fire risk. This mostly applies to US models. Switch off and call a pro.
Likely causes
- Loose or damaged solar connection
- Damaged panel cabling
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: Deye Hybrid Inverter User Manual SUN-3K…6K-SG04LP1-EU, section 7 “Fault information and processing” (paraphrased)
Sunsynk inverters are built on the Deye platform and use the same F-codes. Check your Sunsynk manual if anything differs.