What you will see
- Alarm 39 and the inverter stops
- Scorch marks on connectors
Why it happens
Loose or damaged DC connections heat and spark.
Diagram
Repair first, then restart
Good connection
ConnectorTight, dry
→InverterRunning
Loose or burnt
ConnectorArcing
→InverterAlarm 39
What you can check yourself
- Look for scorch marks from a safe distance
What not to do
- Do not touch DC connectors
- Do not clear the alarm before repair
When to call us
- Inspect and replace connectors
- Clear after repair
Connector inspections
We inspect DC connectors on Sineng systems in Faisalabad and Lahore.
Send us
alarm and photos of marks