Resistor Module Abnormal Discharge (1) (ECM)
Fanuc · Macro B CNC Programming
What does F mean?
The Energy Charge Module's (ECM) Capacitor Modules are not discharging as expected, possibly due to a fault in the Resistor Module (A06B-6158-H030) or its control circuit. This indicates a failure in the controlled release of stored energy, which could lead to overvoltage.
Repair Steps
- 1
Immediately stop the machine using the emergency stop button and open the external Main Circuit Contactor (MCC) of the Power supply.
- 2
Check the Resistor Module (A06B-6158-H030) for any visible damage, signs of overheating, or a blown fuse. Its expected resistance is 30 ohm (page 578).
- 3
Inspect the wiring of the discharge circuit between the ECM Control Module (A06B-6158-H010) and the Resistor Module for breaks or loose connections.
- 4
Verify the control signals that initiate discharge to the Resistor Module, ensuring they are correctly issued by the Control Module.
- 5
If the alarm persists, the Resistor Module may be faulty and require replacement.