
25
2) Check the resistance of the thermistor. Resistance should be 10k
Ω
@
25
o
C or 12.5k
Ω
@ 20
o
C. Replace if faulty.
3)
Replace the Motor Control Module.
45.
Display Memory Check Fault
On power up, the display has checked its memory against a known reference and found differences.
Primary Source:
Display Module.
Action:
Replace Display Module.
46.
Display Memory EEPROM Check
The Display has detected a problem with its internal EEPROM.
Primary Source:
Display Module.
Action:
Replace Display Module.
49.
Cold Valve or Cold Valve & Hot Valve Faulty
The Motor Control Module has measured a voltage from the valve diagnostic circuit (or both the valve
and pump diagnostic circuit) that indicates that the cold valve or both the hot and cold valves are open
circuit. The most likely cause is that the valve harness has not been connected correctly or the valve(s)
is open circuit.
It could also indicate that there is a problem with the pump or pump system. It also can be caused by a
failure of the Motor Control Module pump drive while the pump is running. This will manifest as fault
code 249 which can change to fault code 49 when power to the machine is removed then reapplied.
Primary Source:
Wiring.
Action:
Check the valve harnesses are correctly fastened to the valves and the Motor
Control Module, or the pins are not bent backwards. If possible, test the
harness for continuity between the valve end of the harness and the Motor
Control Module end of the harness.
Check that the lid lock harness has not chaffed and shorted to the wrapper.
Secondary Source:
Water Valves.
Action:
Measure the resistance of the Hot and Cold valve coils.
Tertiary Source Water Valves:
Motor Control Module.
Action:
Replace the Motor Control Module.
Tertiary Source:
Pump System.
Action:
Measure the resistances of the pump stator windings from the controller end
of the pump harness. The resistance between each pair of terminals should
measure approximately 16.2
Ω
. If an open circuit is detected, the reading
should then be taken directly from the pump stator, as the fault may be in the
harness. Carry out any corrective action as and if required.
If the reading is correct or otherwise, follow procedures for Fault Code 249,
as a problem in the pump or pump system such as a blockage or restriction
may have contributed to the failure.
Note: If a fault has been found in the pump system, after correcting the fault, it is also likely
that the Motor Control Module will need to be replaced.
Quaternary Source Pump System:
Motor Control Module.
Action:
Replace the Motor Control Module.
50.
Hot Valve Coil Faulty
The Motor Control Module has measured a voltage from the valve diagnostic circuit that indicates the
hot valve is faulty. The most likely cause is that the valve harness has not been connected correctly or
the valve is open circuit. See fault 49 for service procedure.