What you will see
- Alarm 41 after installation or roof work
Why it happens
Swapped string cables.
Diagram
One string connected the wrong way
Correct
String+ to +, − to −
→InverterUses it
Reversed
StringSwapped
→InverterAlarm 41
Leave the DC side to an engineer with a meter.
What you can check yourself
- Note recent work
What not to do
- Do not switch the DC switch off or pull connectors under load
When to call us
- Correct polarity safely
After roof work
We correct reversed strings on Sineng systems in Faisalabad and Lahore.
Send us
alarm photo