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Grundfos CMBE 3-93 Instrucciones De Instalación Y Operación página 25

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Cause
The inlet pipe is partly blocked by impurities.
The non-return valve is blocked in a closed
position.
There is a leakage in the inlet pipe.
There is air in the inlet pipe or pump.
11.4 The performance is unstable and there is a green indicator light
Cause
The pump inlet pressure is too low.
The inlet pipe is partly blocked by impurities.
There is a leakage in the inlet pipe.
There is air in the inlet pipe.
11.5 The pump is not running and the motor shows a red indicator light
Cause
The motor is overheated.
The sensor is defective.
Cause unknown.
Remedy
Remove and clean the inlet pipe.
Inspect, repair, or replace the non-return valve if
necessary.
Vent the inlet pipe and the pump.
Remedy
Check the inlet conditions of the pump.
Remove and clean the inlet pipe.
Remove and repair the inlet pipe.
Vent the inlet pipe and the pump.
Remedy
Check the inlet conditions of the pump.
Remove and clean the inlet pipe.
Remove and repair the inlet pipe.
Vent the inlet pipe and the pump.
Replace the sensor.
Contact Grundfos or an authorized service
workshop.
25

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