Moyer Diebel MH-6LM5, MH-6NM5, MH-60M5 technical manual Testing Board Outputs

BASIC SERVICE

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.

F1
H
				WASH
T2				OUTPUT
N				T3
T1			POWER	RINSE
START SW.				OUTPUT
T7			L1	T4
DOOR SW.		JB3		JB1
				HEATERS
T8				OUTPUT
FLOAT SW.				T5
T9				LAMP
EXT. WASH		U1		OUTPUT
L2	L3	L4		T6
T10
FILL	RINSE	WASH	JB2

Figure 14

Solid State

Control Board

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