Bin Control Check - Hoshizaki C-100BAF Service Manual

Diagnosis – Check that UF/S and LF/S open, WCR de-energizes, and WV energizes.
If UF/S and/or LF/S do not open, see "IV.D. Float Switch Check and Cleaning." If WV
does not energize, check WCR terminal #2 (GY wire) to a neutral (W wire) for 115VAC.
If 115VAC is not present, replace WCR. If 115VAC is present, check for continuity
through WV solenoid. If open, replace WV. After LF/S opens, check that TDR terminal
#9 (R wire) has power and GM, FM, CR, and Comp remain energized until UF/S closes
or FT terminates. If not, check TDR. Check that WCR energizes and WV de-energizes
when reservoir is full. If not, check WCR, UF/S, and WV. See "IV.D. Float Switch Check
and Cleaning."
11) Shutdown (bin full) – Ice fills storage bin to level of BC. BC opens within 10 seconds
after ice contact. BCH remains energized. WCR, TDR, GM, FM, CR, and Comp
de-energize.
Diagnosis: When the icemaker is running, hold ice in contact with BC bulb. If the
components fail to de-energize within 10 seconds, check BC. See "IV.C. Bin Control
Check."
Legend: BC–bin control thermostat; BCH–bin control heater; Comp–compressor;
CR–compressor relay; FM–fan motor; F/S–float switch; FT–90-second fill timer
(low water safety; internal to TDR); GM–gear motor; LF/S–lower float switch;
TDR–time delay relay; UF/S–upper float switch; WCR–water control relay; WV–
inlet water valve
Float Switch
Assembly
Reservoir
Cover
Reservoir
Evaporator
Assembly
Fig. 4
C. Bin Control Check
1) Move the power switch to the "ON" position to start the automatic icemaking process.
2) To confirm BC operation, hold ice in contact with BC bulb. If the icemaker does not shut
down within 10 seconds, BC must be adjusted. For BC thermostat location, see Fig. 1.
Installations at higher altitude locations are more likely to require adjustment. If BC will
not shut down the unit even after being adjusted, replace BC. NOTICE! Some units
contain a sticker that states: "The bin control heater has been disconnected. DO
NOT reconnect the bin control heater." In this case, leave BCH disconnected or
replace BC assembly with 3A2561A03.
Legend: BC–bin control thermostat
Drain Plug
Drain Clamp
Drain Hose
Upper Rear Panel
27