1.4 Testing Board Outputs
After you have verified that the circuit board is receiving power (as explained above), then test
the board outputs. There are 4 board outputs:
• Wash Cycle.
• Rinse Cycle.
• Heaters.
• In-Cycle Lamp.
Perform the following steps to test a board output:
1. Set the voltmeter to measure AC volts.
2. Place the negative (black) test probe on the “neutral” terminal:
• T1, marked “N”.
3. Place the positive (red) test probe on the output terminal to be tested:
• T3, marked “WASH OUTPUT” (for the wash cycle) (doors must be closed before testing).
• T4, marked “RINSE OUTPUT” (for the rinse cycle) (doors must be closed before testing).
• T5, marked “HEATERS OUTPUT” (for the water heater).
• T6, marked “LAMP OUTPUT” (for the in-cycle lamp indicator).
4. Check the results on the voltmeter for the terminal you are testing:
• For T3 – the meter should read 120 VAC whenever the unit is in-cycle and the “WASH”
LED is illuminated on the circuit board.
• For T4 – the meter should read 120 VAC whenever the unit is in a fill or rinse mode and
the corresponding “FILL” or “RINSE” LED is illuminated on the circuit board.
• For T5 – the meter should read 120 VAC whenever the power switch is on and the wash
tank is full (i.e., the float switch is up).
• For T6 – the meter should read 120 VAC whenever the machine is in-cycle.
Figure 14
Solid State
Control Board
EXT. WASH
FLOAT SW.
START SW.
DOOR SW.
