Install Instructions

Cause Remedy
15.4 The pump is running
Grundfos Eye Indicator light
Automatic
reset
Cause Remedy
No
The non-return valve is not properly closed,
or the pipe system is leaking. This happens
when cycling alarm and/or leakage alarm
are disabled.
Check and repair the pipe system, or clean,
repair or replace the non-return valve.
No Small continuous consumption.
Check the taps and reconsider the usage
pattern (ice machines, water evaporators for
air-conditioning, etc.).
Cause Remedy
15.5 The pump cuts out during operation
Condition
Grundfos Eye Indicator light Automatic reset Cause Remedy
- -
Overheating due to excessive liquid temperature
above 45 °C.
Supply cold liquid to the pump.
- -
Overheating caused by
– high ambient temperature 55 °C
– overloaded motor
– seized-up motor or pump.
Contact your pump supplier.
- - Supply voltage too low.
Check the supply voltage and
correct the fault, if possible.
Cause Remedy
15.6 The pump performance is insufficient
Grundfos Eye Indicator light Automatic reset Cause Remedy
- - Pump inlet pressure is too low. Check pump inlet conditions.
- - Pump is undersized. Replace the pump with a larger pump.
- -
Inlet pipe, inlet strainer or pump are partially
blocked by impurities.
Clean the inlet pipe or the pump.
- - Leakage in the inlet pipe. Repair the inlet pipe.
- - Air in the inlet pipe or the pump.
Prime the inlet pipe and the pump. Check
pump inlet conditions.
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English (GB)