Hoshizaki KM-420MWJ Service Manual page 42

2a. Mechanical Bin Control Check - (2A8598G01)
Model
KM-350MAJ
KM-520MAJ
KM-660MAJ
KM-660MWJ
This appliance uses a lever-actuated proximity switch to control the ice level in the
storage bin. No adjustment is required.
To check BC, 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, then clear any ice away from BC.
4) Check BC wire harness connections. See Fig. 9.
5) Disconnect BC connector from CB K4 connector.
6) Check for continuity across the wires of
BC connector. When the actuator paddle is
not engaged, BC 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.2a. Bin Control Cleaning." If BC
switch still reads open, replace BC.
7) Press and hold the actuator paddle; check for continuity across the wires of BC
connector. When the actuator paddle is engaged, BC switch is open. If closed, check
that the actuator paddle is not restricted. Clean if necessary. See "II.D.2a. Mechanical
Bin Control Cleaning." If BC switch still reads closed, replace BC.
8) Reconnect BC connector to CB K4 connector, then move the control switch to the "ICE"
position. Turn on the power supply.
9) Check that CB yellow "BC OPEN/CLOSED" LED is on.
10) Allow the icemaker to cycle on. Press and hold the actuator paddle. CB yellow
"BC OPEN/CLOSED" LED should turn on and the icemaker should shut down
according to the chart below. If it does not, replace CB.
Cycle at
Mechanical Bin
Control Activation
Fill Cycle
Harvest Cycle
Freeze Cycle
Legend: BC–bin control; CB–control board
Auxiliary Code Break
L19077K to L19236K
L02153K to L02411K
L05262K to L05441K
L00674K to L00693K
Shutdown
15 sec. after activation.
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.
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.
Connection Detail
Wire Harness
Connector B
(for upper unit)
Bin Control
Cable
Connector
Fig. 9
42
Wire
Harness
Connector A
Control Board
Red K4 Connector