Hoshizaki MWH(-M), MWH KM-515MAH, MRH/3 Cycle at Shutdown Mechanical Bin Control Activation

2. Mechanical Bin Control Check and Cleaning

a)Mechanical Bin Control Check

This appliance uses a lever-actuated proximity switch to control the ice level in the storage bin. No adjustment is required.

To check TBC, follow the steps below.

1)Turn off the power supply.

2)Remove the front panel, then move the control switch to the "OFF" position.

3)Remove the control box cover and base cover, then clear any ice away from MBC.

4)Check MBC wire harness connections. See Fig. 1.

5) Disconnect MBC connector from CB K4 connector.

MBC Connector (to control board K4 (red) connector)

6)Check for continuity across the wires of MBC connector. When the actuator paddle is not engaged, MBC switch is closed.

If open, check that the wire harness connector is properly connected and that the actuator paddle is not sticking. Clean if necessary. See "II.D.2.b) Mechanical Bin Control Cleaning." If MBC switch still reads open, replace MBC.

MBC

MBC Wire

Harness (white)

Connector

Actuator

Paddle

Fig. 1

Model Shown: KM-901M_H/3

7)Press and hold the actuator paddle; check for continuity across the wires of MBC connector. When the actuator paddle is engaged, MBC switch is open. If closed, check that the actuator paddle is not restricted. Clean if necessary. See "II.D.2.b) Mechanical Bin Control Cleaning." If MBC switch still reads closed, replace MBC.

8)Reconnect MBC connector to CB K4 connector, then move the control switch to the "ICE" position. Turn on the power supply.

9)Check that CB green "BC CLOSED" LED is on.

10)Allow the icemaker to cycle on. Press and hold the actuator paddle. CB yellow

"BC OPEN" LED should turn on and the icemaker should shut down according to the chart below. If it does not, replace CB.

Cycle at	Shutdown
Mechanical Bin
Control Activation
Fill Cycle	15 sec. after activation.
Harvest Cycle	At the end of the harvest cycle, or up to 15 sec. into the freeze cycle if activated at the
	end of the harvest cycle.
Freeze Cycle	15 sec. after activation if activated at least 15 sec. before the 5-min. short cycle
	protection timer terminates. Otherwise, at the end of the next harvest cycle.

Legend: MBC–mechanical bin control; CB–control board

32