Equator WB 818 - Manual (Page 6)

TIMER CYCLE CHART
COMPONENT OPERATION
AND REPAIR
SAFETY PRECATIONS
Always turn off the electric power supply before servicing any electrical
component, making ohmmeter checks, or replacing any 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, all
electrical connections are secure, and all access panels are in place.
CIRCUIT BOARD
With the circuit board, user selects the various cleaning cycles of the dishwasher
with press the button. The circuit board 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 Test Circuit Board
If the circuit board is suspected of faulty operation, reference chart and electrical
schematic diagram and proceed as follows:
1. Index the circuit board to all of the increment of the cycle, each of the
indicators light should is bright.
2. Index the circuit board to one of the increment of the cycle, which is a drain
period.
3. 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.
4. If a component controlled by the circuit board fails to function as the circuit
board advances through the cycle, check for voltage at the circuit board
terminals. If the check voltage is supplied to the component, check the
component as described in this section.
Continuity through circuit board contacts, other controls, and wires can also
be checked with an ohmmeter with electrical power disconnected.
If the circuit boards contacts fail to close in the sequence shown on the chart
are burned (have resistance measurable with an ohmmeter), or if circuit
board does not run automatically, replace the circuit board.
To Replace Circuit Board
1. Disconnect dishwasher from electrical supply.
2. Remove the power button.
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