Mechanical Bin Control Check - Hoshizaki KM-1301SAH/3 Service Manual

2. Mechanical Bin Control Check

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 MBC, 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
MBC.
4) Check MBC wire harness connections. See Fig. 1.
5) Disconnect MBC connector from CB K4 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.
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
Mechanical Bin
Control Activation
Fill Cycle
Harvest Cycle
Freeze Cycle
Legend: MBC–mechanical bin control; CB–control board
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.
Wire Harness
Connector B
(for upper unit)
Bin Control
Cable Connector
Fig. 1
37
Connection Detail
Wire Harness
Connector A
Control Board
Red K4 Connector