[Power sequence board] External AC power interrupted. (for E0x series controllers)

Error handling: Controller power OFF;
Error reset: Possible

Description: This error occurs when the AC external power supply voltage drops to or below the rated value -30% for 1/50 to 1/30 second.

External power supply
AC200V
Control power supply AVR
NFB
Remote
AC error signal
AVR
Output cutoff
Main CPU board
CPLD
Power sequence board

Main causes:

1. The AC external power supply is faulty.

2. A problem with wiring or connector connections inside the controller.

3. A problem with the AVR.

4. A problem with the power sequence board.

Countermeasures:

1. Check the external power supply voltage.

2. Check the internal controller wiring and connector connections for problems.

3. Replace the AVR.

4. Replace the power sequence board.

[NOTE]
It is normal for this error to occur when the controller power switch is turned off.