Grundfos CMBE 1-44 Installation And Operating Instructions Manual page 19

Fault Grundfos Eye
Pump has tried to Alarm.
restart five times
Motor stopped.
and is now stop-
Two opposite red indica-
ped.
tor lights flashing simul-
taneously.
Pump runs back- No lights on.
wards when
switched off.
Cause
Pump inlet pressure too low.
Inlet pipe is partly blocked by
impurities.
The foot or non-return valve
is blocked in closed position.
Leakage in inlet pipe.
Air in inlet pipe or pump.
Leakage in inlet pipe.
Foot or non-return valve de-
fective.
Foot valve is blocked in com-
pletely or partly open posi-
tion.
Remedy
Check the inlet conditions of the
pump.
Remove and clean inlet pipe.
Remove and clean, repair or re-
place valve.
Remove and repair the inlet
pipe.
Vent the inlet pipe or pump.
Check the inlet conditions of the
pump.
Remove and repair inlet pipe.
Remove and clean, repair or re-
place valve.
Remove and clean, repair or re-
place valve.
19