Grundfos JP - Fault Finding Boosters with a Pressure Manager

Remedy
Change the position of the pump. The suction lift
must not exceed 8 m.
Cause
The inlet pipe is too long.
Remedy
Change the position of the pump.
Cause
The diameter of the inlet pipe is too small.
Remedy
Replace the inlet pipe.
Cause
The inlet pipe is not immersed deeply enough.
Remedy
Make sure that the inlet pipe is immersed
sufficiently.
Cause
The inlet pipe is leaking.
Remedy
Repair or replace the pipe.
8.4 Fault finding boosters with a pressure
manager
8.4.1 Operating panel for pressure manager PM 1
Reset
Power on
Pump on
Alarm
PM 1
2
3
1
4
TM039360
Operating panel on pressure manager PM 1
Pos. Symbol Description
1
Power
on
The green indicator light is
permanently on when the power
is on.
2
Pump
on
The green indicator light is
permanently on when the pump
is running.
3 Alarm
The red indicator light is
permanently on or flashes when
the pump has stopped due to an
operating fault.
4 Reset
The reset button is used for the
following:
• resetting fault indications
• enabling and disabling the
anti-cycling function.
For indicator light check, all indicator lights illuminate
when the power is switched on.
8.4.2 The "Alarm" indicator light flashes once at a
regular interval
For systems without a pressure tank.
The anti-cycling function has stopped the pump
because the pump starts and stops too frequently.
Cause
A tap has not been entirely closed after use.
Remedy
Make sure all taps are closed.
Cause
There is a minor leakage in the system.
Remedy
Make sure there are no leakages in the system.
8.4.4
The "Power on" indicator light is off even
though the power supply has been switched
on
Cause
The fuses in the electrical installation have blown.
Remedy
Replace the fuses. If the new fuses also blow,
check the electrical installation for malfunctions.
Cause
The earth-leakage circuit breaker or the voltage-
operated circuit breaker has tripped.
Remedy
Cut in the circuit breaker.
Cause
The pressure manager is defective.
20
English (GB)