Moyer Diebel MH-60M5, MH-6NM5, MH-6LM5 technical manual Operation

BASIC SERVICE

Models MH-60, MH-6N, and MH-6L use a float switch and circuit board to control tank fill and tank heat.

For Model MH-60 only, the built-in booster heat circuit is also controlled by the float switch.

Operation:

1.When dishwasher main power switch is turned on (wash tank empty), the drain valve closes allowing cycle time to run for a minimum of 110 sec- onds to fill the tank.

2.The float switch ball rises; its normally open contacts close. The fill circuit times out; the fill solenoid de-energizes, and the tank heat and booster heat energize.

Figure 15

Float Switch

3.If water level drops below the float level, the float switch ball moves down; heat de-energizes. The fill solenoid energizes and the fill cycle runs for a minimum of 110 seconds to refill the tank.

4.If the tank is not full of water at the end of the 110-second fill cycle, then the machine will cycle again. When the float switch is satisfied, the fill cycle stops after completing its 110-second cycle.

5.Refer to the float switch troubleshooting chart below (Fig. 16) for a quick guide to evaluating float switch problems.

Wash

Tank Fills Constantly

Is Tank Full	NO	Check
of Water?		Drain
YES
	NO	Clean
Is the Float
		Float
Ball Up?
		Assy
YES

Is Heat ON when called for?

YES

Check

Solenoid

Valve

NO Replace Float

System

Checks

Figure 16

Float Switch

Troubleshooting Chart

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