English (GB)
7
7. The red "Alarm"
indicator light is
permanently on.
a) Dry running. The pump needs
water.
Check the pipework.
b) The power supply to the pump is
disconnected after the PM unit.
Check the plug and cable connections, and
check if the built-in circuit breaker of the pump
is switched off.
c) The motor protection of the
pump has tripped due to
overload.
Check if the motor/pump is blocked.
d) The pump is defective. Repair or replace the pump.
e) The PM unit is defective. Repair or replace the PM unit.
8. System without
pressure tank:
The red "Alarm"
indicator light
flashes once per
period.
a) Cycling.
A tap has not been closed
entirely after use.
Check that all taps have been closed.
b) Cycling.
There is a minor leakage in the
system.
Check the system for leakages.
9. System with
pressure tank:
The red "Alarm"
indicator light
flashes once per
period.
a) Cycling.
The pressure tank has no
precharge pressure, or the tank
size is insufficient.
Check the tank precharge pressure, and
recharge the tank, if necessary.
If the size of the pressure tank is insufficient,
set DIP switch 5 to "OFF", or replace the
pressure tank.
See quick guide.
10. The red "Alarm"
indicator light
flashes twice
per period.
a) Maximum continuous operating
time (30 minutes).
The pump has been running
continuously for 30 minutes.
Check the system for leakages.
Disable the function to allow the pump to run
for 30 minutes.
See quick guide.
11. The red "Alarm"
indicator light
flashes three
times per
period, and
each pump start
is delayed a few
seconds.
a) Too many start/stop sequences
within a short period.
The pressure tank has no
precharge pressure, or the tank
size is insufficient.
Check the tank precharge pressure, and
recharge the tank, if necessary.
If the size of the pressure tank is insufficient,
set DIP switch 5 to "OFF", or replace the
pressure tank.
b) Too many start/stop sequences
within a short period.
The PM 2 is set to start/stop with
1 bar differential pressure, i.e.
DIP switch 5 is set to "ON", but
no pressure tank has been
installed in the system.
Set DIP switch 5 to "OFF".
12. The red "Alarm"
indicator light
flashes four
times per
period.
a) Pressure sensor fault. Repair or replace the PM unit.
13. The pump
performance is
unstable.
a) Pump inlet pressure too low. Check the inlet conditions of the pump.
b) Suction pipe is partly blocked by
impurities.
Remove and clean the suction pipe.
c) Leakage in suction pipe. Remove and repair the suction pipe.
d) Air in suction pipe or pump. Vent the suction pipe/pump.
Check the inlet conditions of the pump.
Fault Cause Remedy
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