A1-00 — Zero cross detection problem

What does A1-00 mean?

The unit is experiencing an issue with detecting the zero crossing point in its electrical cycle, which can affect operation.

• Power supply instability
• Internal electronic fault
• Wiring issue to the control board

Click steps to track your progress.

1. 1

   Check the main power supply voltage stability.

2. 2

   Ensure all electrical connections are secure.

3. 3

   Restart the unit after a power interruption.

4. 4

   An electrician or technician may need to diagnose the control board.