Service Manual

Service manual WM70.C
18
Fault indicators
Error message Cause Action
Over flow fault Too much water in the
machine.
Service action:
Check the machine's level system, inlet valve and
drainage pump. Check for any leaks.
The drainage pump is
running but the machine is
empty.
Water outlet fault • The drainage pump has
been running for 3 minutes.
Water remains in the
machine.
• The wash cycle
is stopped and the
programme is reset.
1. Check that nothing is stuck in the drainage hose
outlet.
2. Check that the drainage pump is not blocked
by foreign objects.
3. Check that there are no kinks in the drainage
hose.
Service action:
1. If the pump only runs for a short while
(approximately 20 seconds), this indicates a fault
in the level system. Check the level sensor and
hoses.
2. Check the wiring and voltage to the pump. If
necessary, replace the pump and/or control unit.
3. After taking corrective action, run the Drain
programme or press the Key (door opening)
button to empty the machine.
Water inlet fault If the correct water level
is not achieved within five
minutes the wash cycle will
be stopped.
1. Check that the tap on the water pipe is open.
Service action:
1. Check that the filter in the machine's water
intake is not blocked.
2. Check the inlet valve. If necessary, replace the
valve.
3. Check the voltage to the inlet valve. If there is
no voltage, this could be due to a fault in the level
system, wiring or control unit.
Security fault The door is open Close the door
Thermistor fault 1. Thermistor circuit open
2. Thermistor malfunction
3. The measurement value
for the thermistor is <300
Ω (>120°C)
Service action:
Check the thermistor. Replace if necessary.
Temperature fault The temperature has
increased < 5°C in ten
minutes
The wash cycle should
continue to the next step
of the programme.
Service action:
Check the thermistor, heater, wiring and level
system.
Wash motor fault No signal from the tacho
or MCU.
Service action:
Check the output signal from the MCU and the
wiring between the motor and the MCU.
Pressure fault Indicated if the level drops
to zero within 30 seconds
of the first rinse.
Service action:
Check for leaks.