Hoshizaki MRH/3 사용자 설명서

31

TBC shuts down the icemaker within 10 sec. when ice contacts the thermostatic bulb, 
regardless of the cycle at activation. 

When the ambient temperature is below 45°F (7°C), TBC opens and shuts down 
the appliance even if the ice storage bin is empty. When BC is set in the prohibited 
range, the appliance operates continuously even if the ice storage bin is filled with 
ice. Setting in the prohibited range may result in severe damage to the appliance.

TBC is factory set, and generally no adjustment is required. However, adjustment may be
needed in some conditions, particularly at higher altitude locations.

Note: If used on "G" control boards, a jumper (4A4883G01) must be placed on the CB 

red K4 connector. Otherwise, CB yellow "BC OPEN" LED is on and appliance will not 
start. 

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 TBC bulb.
4) Disconnect TBC wires from TBC switch.
5) Hold your hand around the 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 sec., TBC switch should open. If it remains closed, adjust or 
replace TBC.

Legend: 

TBC–thermostatic bin control