Safety Precautions; Operation And Repair - Danby DDW1802 Service Manual

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COMPONENT OPERATION AND REPAIR
SAFETY PRECATIONS
Always turn off the electric power supply before servicing any electrical
component,makingohmmeterchecks,or replacingany parts.,
All voltage checks should be made with a voltmeter having a full scale range of
130 volts or higher.
After service is completed, be sure all safety-grounding circuits are complete, a!t
electrical connections are secure, and all access panels are in place.
TIMER
With the timer, user selects the various cleaning cycles of the dishwasher. The
timer controls all the electrical functions of the dishwasher in all stages of each
cycle.. All functions can be traced on the chart.. Diagram provided in this service
manual..
To Tegt Tt_eTinier
If the timer is suspected of faulty operation, reference timer chart and electrical
schematic diagram and proceed as follows:
1. Index the timer to the first increment of the normal cycle, which is a drain
period.
2. If the pump motor fails to operate during the first cycle increment, check for
power at the pump motor connector block, if there is no power check the door
latch switch, if there is power, check the pump motor as described in this
section.
3o If the pump motor does operate, let the timer motor advance the timer through
the drain increment to determine if the timer motor and drive train are fully
operative.
4. Let the timer advance, or index it forward to the portion of the cycle in
question..
5. If a component controlled by the timer fails to function as the timer advances
through the cycle, check for voltage at the timer terminals, tf the check voltage
is supplied to the component, check the component as described in this
section
Continuity through timer contacts, other controls, and wires can also be
checked with an ohmmeter with electrical power disconnected.
If the timers contacts fail to close in the sequence shown on the timer chart
are burned (have resistance measurable with an ohmmeter), or if timer does
not advance automatically, replace the timer.
To Replace Timer
I Disconnect dishwasher from electrical supply
2.. Remove the timer knob..