[Servo board XX] No response from MCXX. (Code:XX) (for E0x series controllers)

Error handling: Motor power OFF.
Error reset: Possible.

Description: No response was received from the power supply unit or power unit.

Main causes:

1. An open circuit or poor connection in the harness between the servo board (X503, X504, X505) and power supply unit control board (X304).

2. The power supply unit is faulty.

3. A problem with the servo board.

Countermeasures:

1. Check the harness connections between the power supply unit and the servo board.

2. Replace the power supply unit.

3. Replace the servo board.