DW 953, 954, 955, 95FI
FAULT INDICATIONS
L3 and L7 and display ”F1” (DW955) is blinking: Heating element fault.
L1-L8 and display ”F2” (DW955) is blinking: Overfill.
L4 and L5 and display ”F3” (DW955) is blinking: Sensor fault.
L6 and L7 and display ”F4” (DW955) is blinking: Water inlet fault.(Just
machines with level sensor).
L1-L4 together with L5-L8: The door is open during machine operation.
CONTROL UNIT
The control unit contains a microprocessor for control of programs,
circulation pump, inlet valves etc.
CIRCULATION PUMP
The circulation pump consists of an asynchronous motor and pump,
constructed in an integrated unit. A 4 µF capacitor is fitted to ensure
reliable starting of the circulation pump.
OUTLET PUMP
The outlet pump consists of a synchronous motor and pump, constructed
in an integrated unit.
INLET VALVE
Depending on model, there are three types of inlet valves:
1. With safety valve: Two solenoids independant from each other or valve
seats are connected to a unit.
2. Single-unit type: A solenoid and valve seat.
3. Softener valve: Two valves in shunt, one for the regeneration of the softe
ner and the other for normal inlet.
HEATING ELEMENT
Heating elements with the following capacities: 1800 W, 2500 W and 1800
W + 1200 W alternatively.
THERMISTOR
The thermistor controls the water temperature to give the required tempera-
ture. The heater will be disconnected if the thermistor is short-circuited or
loosened from the circuit board. See fault indications. The normal resistance
of the thermistor is beetween 25 and 15 Kohm at 20°C, or 30°C alternately.
HIGH TEMPERATURE CUTOUT
Thermostat with switch-off-function at 88°C, 190°F prevents the heating
element from remaining continously energised if the control unit or the timer
should fail.
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