Applicable Systems
MAGNA1
Symptoms
Watchdog fault. The watchdog timer has detected a controller hang and has restarted the system.
Possible Causes
- Controller firmware hang or infinite loop
- Excessive processing load on the controller
Troubleshooting Steps
- Step 1: Check the controller fault log for watchdog events
Watchdog timeout is recorded - Step 2: Update the controller firmware if available
Firmware update prevents recurrence
How to Reset
To reset: Power-cycle the controller. If the error recurs, update the firmware.
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Source: Grundfos Pump Troubleshooting Guide, Grundfos Group
Category: Pump
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