Grundfos CM Booster PM1 Instrucciones De Seguridad E Información Importante página 12

Fault
5. The pump does not
stop.
6. The red "Alarm"
indicator light is
permanently on.
7. The red "Alarm"
indicator light is
flashing.
8. The pump
performance is
unstable.
9. The pump runs
backwards when
switched off.
Self-priming pumps only:
10. The pump
performance is
unstable and the
pump is noisy.
11. When startup is
attempted, the
pump starts, but
delivers no
pressure or flow.
12. The pump runs, but
does not deliver
the rated flow rate.
13. The pump
performance is
unstable.
12
Cause
a) The pump cannot deliver the
necessary outlet pressure.
b) A PM unit with too high start
pressure is installed.
c) The PM unit is defective.
d) The non-return valve is stuck in
open position.
a) Dry running. The pump needs water. Check the pipes.
b) The power supply to the pump is
disconnected after the PM unit.
c) The motor protection of the pump
has tripped due to overload.
d) The pump is defective.
e) The PM unit is defective.
a) Cycling. A tap has not been closed
entirely after use.
a) Pump inlet pressure is too low.
b) The inlet pipe is partly blocked by
impurities.
c) Leakage in the inlet pipe.
d) Air in the inlet pipe or pump.
a) Leakage in the inlet pipe.
b) The foot or non-return valve is
defective.
c) The foot valve is stuck in completely
or partly open position.
a) The differential pressure across the
pump is too low.
a) Liquid column above non-return
valve in the outlet pipe prevents the
pump from self-priming.
b) The inlet pipe draws in air.
a) The internal valve did not close.
a) Pump inlet pressure is too low.
b) The inlet pipe is partly blocked by
impurities.
c) Leakage in the inlet pipe.
d) Air in the inlet pipe or pump.
Remedy
Replace the pump.
Select a PM unit with a lower start
pressure.
Repair or replace the PM unit.
Clean or replace the non-return valve.
Check the plug and cable connections,
and check if the built-in circuit breaker
of the pump is switched off.
Check if the motor/pump is blocked.
Repair or replace the pump.
Repair or replace the PM unit.
Check that all taps have been closed.
Check the inlet conditions of the pump.
Remove and clean the inlet pipe.
Remove and repair the inlet pipe.
Vent the inlet pipe or pump.
Check the inlet conditions of the pump.
Remove and repair the inlet pipe.
Remove and clean, repair or replace
the valve.
Remove and clean, repair or replace
the valve.
Close the tap gradually until the outlet
pressure is stable and the noise has
ceased.
Empty the outlet pipe. Make sure that
the non-return valve does not hold back
liquid in the outlet pipe. Repeat the
startup procedure.
Make sure that the inlet pipe is airtight
from pump to liquid level. Repeat the
startup procedure.
Close the tap gradually until the
pressure or flow suddenly increases.
Then open the tap gradually until the
required flow is reached.
Check the inlet conditions of the pump.
Remove and clean the inlet pipe.
Remove and repair the inlet pipe.
Vent the inlet pipe or pump.
Check the inlet conditions of the pump.