ABB IRC5 M2004 Error Code 20252

ABB Robot Major DriveSystem

Model: IRC5 M2004 | Code: 20252

Applicable Systems
AC500 AC590 ACS580 ACS880

Symptoms

The ABB IRC5 robot controller displays alarm 20252, indicating motor temperature high with a DRV1 (drive module 1) fault. The affected axis motor has overheated or the drive module has detected a thermal fault.

Possible Causes

  • Motor overload due to excessive payload or high acceleration
  • Motor cooling insufficient due to blocked air paths or fan failure
  • Control cabinet to motor cable damaged causing high resistance
  • Drive module (DRV1) internal thermal sensor or power stage fault

Troubleshooting Steps

  1. Step 1: Check motor temperature by feel or IR thermometer
    Motor surface temperature should not exceed 80C under normal operation; excessive heat indicates overload
  2. Step 2: Verify robot payload is within rated capacity
    Payload including end-of-arm tooling must not exceed the robot's rated capacity
  3. Step 3: Inspect motor cable connections at control cabinet ( aviation plug)
    All plugs must be fully seated; check for bent pins or corroded contacts
  4. Step 4: Check drive module cooling fan operation in control cabinet
    Fan must run continuously when drive is powered; replace if failed

How to Reset

To reset: 1) Allow the motor to cool. 2) Reduce payload or cycle speed if overloaded. 3) Power cycle the controller. 4) If alarm persists, check cable continuity and drive module. Caution: Do not short the thermal sensor wires as a workaround - this removes motor thermal protection and can cause motor fire.

Frequently Asked Questions

  • Q: Can I temporarily bypass alarm 20252 to continue production?

    ABB service documents mention that the thermal alarm signal can be shorted on the A43 board, but this is extremely dangerous as it removes all motor thermal protection. Motor fire and equipment damage may result.

  • Q: What motor temperature triggers alarm 20252?

    The threshold depends on the motor class, typically around 150C for the windings. The thermal sensor (PTC or KTY) in the motor triggers the alarm at its rated trip temperature.

Related ABB Fault Codes

Source: ABB IRC5 Operating Manual - Trouble Shooting, Document 3HAC020738-001, Alarm Code 20252

Category: Robot