Fault Finding Chart; Disposal - Grundfos CME Instrucciones De Instalación Y Funcionamiento

8. Fault finding chart

Warning
Before starting work on the pump, make sure that the power supply to the pump has been
switched off and that it cannot be accidentally switched on.
Indicator
lights
Fault
Red
1. Pump does
not run.
2. Pump
performanc
e is
unstable.
3. Pump can
be reset but
runs only for
a few
seconds
4. Pump runs
backwards
when
switched off.

9. Disposal

This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest
Grundfos company or service workshop.
10
Cause
Green
a) Power supply failure.
b) Fuses blown.
c) Sensor is defective.
a) Pump inlet pressure too low.
b) Suction pipe is partly
blocked by impurities.
c) Leakage in suction pipe.
d) Air in suction pipe or pump.
a) Pump inlet pressure too low.
b) Suction pipe is partly
blocked by impurities.
c) The foot or non-return valve
is blocked in closed position.
d) Leakage in suction pipe.
e) Air in suction pipe or pump.
a) Leakage in suction pipe.
b) Foot or non-return valve
defective.
c) Foot valve is blocked in
completely or partly open
position.
Remedy
Switch on power supply.
Check cables and cable connections
for defects and loose connections.
Check cables and cable connections
for defects, and replace the fuses.
Replace sensor.
Check the inlet conditions of the
pump.
Remove and clean suction pipe.
Remove and repair suction pipe.
Vent suction pipe or pump.
Check the inlet conditions of the
pump.
Check the inlet conditions of the
pump.
Remove and clean suction pipe.
Remove and clean, repair or replace
valve.
Remove and repair the suction pipe.
Vent suction pipe or pump.
Check the inlet conditions of the
pump.
Remove and repair suction pipe.
Remove and clean, repair or replace
valve.
Remove and clean, repair or replace
valve.
Subject to alterations.