Hoshizaki KM-1601SWH/3 Benutzerhandbuch

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To check TBC, follow the steps below.

When the ambient temperature is below 45°F (7°C), TBC switch opens and 
shuts down the icemaker even if the ice storage bin is empty. When TBC 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.

TBC is factory set, and generally no adjustment is required. However, adjustment may be 
needed in some conditions, particularly at higher altitude locations. Note that when TBC 
switch is open, CB red "POWER OK" LED is off.

1) Turn off the power supply.
2) Remove the front panel, then move the control switch to the "OFF" position.
3) Clear any ice away from TBC bulb.
4) Remove the control box cover, then disconnect TBC wires from TBC switch.
5) Hold your hand around TBC bulb to warm it up.
6) Check for continuity across TBC switch. If closed, continue to step 6. If open, adjust or 

replace TBC.

7) With the multimeter test leads still in place, hold ice on TBC bulb to lower the 

temperature. Within 10 seconds, TBC switch should open (no continuity). If it remains 
closed, adjust or replace TBC.

Legend: 

CB–control board; TBC–thermostatic bin control