Hoshizaki KM-320MAH Service Manual page 23

9) Shutdown
a) "E" Control Board: Thermostatic Bin Control (TBC):
When the appliance is running, hold ice in contact with the thermostatic
bulb. TBC switch opens within 10 sec., shutting down 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.
NOTICE! Do not adjust S4 dip switch 7 out of the factory default position.
This dip switch must be left in the factory default position or the
appliance will not operate correctly. Diagnosis: See "II.D.1. Thermostatic Bin
Control Check and Cleaning."
b) Mechanical Bin Control:
See "II.D.2. Mechanical Bin Control Check and Cleaning."
Legend: CB–control board; Comp–compressor; CV–check valve; FM–fan motor;
FMR–fan motor-remote; FS–float switch; HGV–hot gas valve; HM–headmaster
(C.P.R.); HPS–high-pressure switch; LLV–liquid line valve; MBC–mechanical
bin control; PM–pump motor; TBC–thermostatic bin control; TXV–thermostatic
expansion valve; WRV–water regulating valve; WV–inlet water valve
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