English (GB)
7
8. Fault finding
Warning
Before starting fault finding, switch off the
power supply. Make sure that the power
supply cannot be accidentally switched on.
Fault Cause Remedy
1. The green "0 bar"
indicator light is off
even if the power
supply has been
switched on.
a) The fuses in the electric
installation have burnt.
Replace the fuses. If the new fuses also
burn, check the electric installation.
b) The earth leakage circuit
breaker or the
voltage-operated circuit
breaker has tripped.
Cut in the circuit breaker and check the
electric installation.
c) The PM unit is defective. Repair or replace the PM unit.*
2. The green "Pump on"
indicator light is on,
but the pump does
not start.
a) The power supply to the pump
is disconnected after the PM
unit.
Check the cable connections.
b) The motor protection of the
pump has tripped due to
overload.
Check if the motor/pump is blocked.
Clean if necessary.
c) The pump is defective. Repair or replace the pump.*
d) The PM unit is defective. Repair or replace the PM unit.*
3. The pump does not
start when water is
consumed.
The "Pump on"
indicator light is off.
a) Too big difference in height
between the PM unit and the
tapping point.
Reposition the pump, or increase the start
pressure.
See the quick guide.
b) The PM unit is defective. Repair or replace the PM unit.*
4. System without
pressure tank:
Frequent
starts/stops.
a) DIP switch 5 set to "ON". Set DIP switch 5 to "OFF".
See the quick guide.
b) Leakage in the pipework. Check and repair the pipework.
c) Non-return valve of the PM
unit is stuck in open position.
Clean or replace the non-return valve.
5. System with
pressure tank:
Frequent
starts/stops.
a) 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) Non-return valve of the PM
unit is leaking.
Clean or replace the non-return valve.
6. The pump does not
stop.
c) The PM unit is defective. Repair or replace the PM unit.*
d) Non-return valve of the PM
unit is stuck in open position.
Clean or replace the non-return valve.
7. The red "Alarm"
indicator light is on.
a) Dry running. Check the water supply.
b) The power supply to the pump
is disconnected after the PM
unit.
Check the cable connections.
c) The motor protection of the
pump has tripped due to
overload.
Check if the motor/pump is blocked.
Clean if necessary.
d) The pump is defective. Repair or replace the pump.*
e) The PM unit is defective. Repair or replace the PM unit.*
