Applicable Systems
MAGNA1
Symptoms
Encoder fault. The motor encoder feedback signal is missing or invalid.
Possible Causes
- Encoder hardware failure
- Encoder cable damaged or connector loose
Troubleshooting Steps
- Step 1: Check the encoder cable and connector
Cable is damaged or connector is loose - Step 2: Verify the encoder signal with an oscilloscope
No signal from the encoder
How to Reset
To reset: Replace the encoder or fix the cable, then reset the controller.
Source: Grundfos Pump Troubleshooting Guide, Grundfos Group
Category: Pump