Asko D1976, Service Manual

Page: 6 / 28

Model D1976
(DW 955)
Page
Date
2000-06
6
CONTROL PANEL (see page 17)
The control panel contains a microprocessor for control of programs, circulation pump, inlet valves, etc.
It also allows for custom settings of programs (see page 3).
CIRCULATION PUMP/MOTOR (see page 19)
The circulation pump/motor consists of a synchronous motor and pump, constructed in an integrated
unit. A 16 µF capacitor is fitted to the circulation motor/pump.
OUTLET PUMP (see page 19)
The outlet pump consists of a synchronous motor and pump, constructed in an integrated unit.
INLET VALVE (see page 19)
A safety-unit type: Two solenoids and valve seats are independently connected to a unit.
HEATING ELEMENT (see page 13)
1400 Watt
THERMISTOR (see page 13)
The thermistor controls the water temperature /-1°C (2.5°F) to give the required temperature.
The heater will be disconnected if the thermistor is short-circuited or loosened from the circuit board and
the fault code "F3" displays in the LED window. The normal resistance of the thermistor is between 25
and 15K ohm at 68°F (20°C) or 86°F (30°C) alternately.
OVERHEAT PROTECTION (see page 13)
The thermostat has a switch-off function at 190° F (88°C) that prevents the heating element from staying
on if the control unit or the timer should fail.
DOOR SWITCH (see page 19)
A microswitch senses that the door has been opened. This interrupts the program and cuts the power to
all control components (motor, valves, etc.).
LEVEL SWITCH (PRESSURE SWITCH) (see page 13)
This switch protects against overfilling by interrupting the power to the inlet valve and starting the outlet
pump. If the water level has not dropped within 30 seconds or if overfill has occurred twice during the
same program, the program will be terminated and a fault code displays. The overfill protection operates
during all programs, including fault-tracing, even if the microprocessor is faulty.
OVERFILL SWITCH (see page 13)
A float in the base pan influences a microswitch that disconnects the inlet valve and starts the outlet
pump.
COMBI-DISPENSER (see page 15)
The combi-dispenser dispenses both detergent and rinse aid. The dispenser has an adjustable volume
chamber for setting the desired amount of rinse aid.
TURBO FAN (see page 15)
The turbo fan vacuates the moist air from the machine during the drying phase of the program. The fan
system consists of a fan motor that runs a two-part impeller. Dry, cool air is pulled in from the door into
one of the impeller halves. A wax motor opens a damper and the moist air is pulled into the other part of
the impeller. The dry, cool air and warm, moist air mix and condense in the condensation chamber. The
condensed moisture then drains through the channel to the lower sump area. Dry air is then vented out
through a channel below the outer door.
ELECTRICAL FUNCTIONS