Applicable Systems
MAGNA1
Symptoms
Phase reversed. The phase sequence of the three-phase supply is incorrect, causing reverse rotation.
Possible Causes
- Phase wiring reversed during installation
- Supply phase rotation changed by utility
Troubleshooting Steps
- Step 1: Check the pump rotation direction
Pump is rotating in reverse - Step 2: Swap two phase wires to correct the sequence
Rotation direction is correct
How to Reset
To reset: Correct the phase sequence, then reset the controller.
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Source: Grundfos Pump Troubleshooting Guide, Grundfos Group
Category: Pump
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