Applicable Systems
MAGNA1
Symptoms
Underload. The pump motor current is below the expected value, indicating possible dry running or cavitation.
Possible Causes
- Pump running dry or air in the system
- Impeller damaged or worn reducing load
Troubleshooting Steps
- Step 1: Check the motor current
Current is below the expected value - Step 2: Verify the pump is primed and the impeller is intact
Pump is dry or impeller is worn
How to Reset
To reset: Prime the pump or replace the impeller, then reset the controller.
Source: Grundfos Pump Troubleshooting Guide, Grundfos Group
Category: Pump