Pumps & Water Systems
E03: Sensor or pressure signal fault
Grundfos SE-1
Safe preliminary checks permitted
Documented meaning
The pressure or flow signal was implausible.
Model variants covered: see the model record
Documented possible causes
- · Sensor or cable fault
- · Air in the sensing line
- · Setting not applied after replacement
Safe preliminary checks
- · Record the code and the reading shown
Professional service required
- · Record the code and the reading shown
- · professional_only
Stop and call a professional if you see
- · Burning smell, smoke, water on live parts or a tripped protective device
- · Unusual noise, vibration or a refrigerant leak