Sineng inverter shows Alarm 21 Device fault, 25 Communication or 33 Bus over-voltage

What you will see

• Alarm 21, 24, 25 or 33

Why it happens

Internal self-checks or high PV voltage.

Diagram

What to do with internal faults

1. 01Write down the exact code
2. 02Switch off, wait, switch on once
3. 03Comes back?
4. 04Call with code and serial

Examples:

21242533

What you can check yourself

• Restart once in the correct order
• Write down the alarm number

What not to do

• Do not restart repeatedly
• Do not open the inverter

When to call us

• Check PV voltage for 33
• Update firmware for 24
• Warranty case

Warranty

We help raise Sineng warranty cases from Faisalabad and Lahore.

Send us

alarm number, photo and serial