Applicable Systems
MAGNA1
Symptoms
Undervoltage. The supply voltage to the pump is below the rated minimum.
Possible Causes
- Power supply voltage too low
- Excessive voltage drop in supply wiring
Troubleshooting Steps
- Step 1: Check the supply voltage at the pump terminals
Voltage is below the rated minimum - Step 2: Verify the power supply capacity and wire size
Supply is undersized or wiring is too small
How to Reset
To reset: Restore the voltage to within range, then reset the controller.
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Source: Grundfos Pump Troubleshooting Guide, Grundfos Group
Category: Pump
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