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C. Bin Control Check
1. Thermostatic Bin Control Check
KM-320MAH-E and KM-650MAH-E Auxiliary Code U-0 and Earlier
KM-515MAH-E Auxiliary Code U-1 and Earlier
TBC switch is a temperature controlled switch used to control the level of ice in the bin. It
is in line with the power supply to the control switch. TBC shuts down the icemaker within
10 seconds when ice contacts the thermostatic bulb, regardless of the cycle at activation.
TBC is factory set, and generally no adjustment is required. However, adjustment may be
needed in some conditions, particularly at higher altitude locations.
To check TBC, follow the steps below.
NOTICE
When the ambient temperature is below 45°F (7°C), the thermostatic bin control
switch opens and shuts down the icemaker even if the ice storage bin is empty.
When the thermostat is set in the prohibited range, the icemaker operates
continuously even if the ice storage bin is filled with ice. Setting in the prohibited
range may result in severe damage to the icemaker.
1) Remove the front panel. Move the control switch to the "OFF" position, then unplug the
icemaker from the mains socket.
2) Remove the control box cover.
3) Disconnect TBC wires from TBC switch.
4) Clear any ice away from TBC bulb, then hold your hand around TBC bulb to warm it up.
5) Check for continuity across TBC switch. If closed, continue to step 6. If open, adjust or
replace TBC.
6) With the multimeter test leads still in place, hold ice on TBC bulb to lower the
temperature. Within 10 seconds, TBC switch should open. If it remains closed, adjust or
replace TBC.
Legend:
TBC
–thermostatic bin control