BASIC SERVICE
27
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.
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.
