Sequence Of Operation; Auxiliary Codes A-1 And Earlier - Hoshizaki C-100BAF Service Manual

B. Sequence of Operation

1. Auxiliary Codes A-1 and Earlier

After the power switch is placed in the "ON" position, the steps in the sequence are as
outlined below.
a) Freeze Cycle
BCH, GM, FM, CR, and Comp energize. 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. Ice production starts 4 to 6 minutes after Comp energizes depending
on ambient and water conditions. The freeze cycle continues until BC shuts down the
icemaker or power is turned off to the icemaker. Refill: The float-operated WV allows
water into the reservoir as needed to continue the icemaking process. If the water supply
is cut off or GM stops during the freeze cycle, the cold evaporator temperature causes
STS to open and de-energize all components except BCH and optional drain pump
HS-0248.
b) Bin Control Thermostat Shutdown
Ice fills storage bin to level of BC. BC opens within 10 seconds after ice contact. When
BC opens, BCH remains energized. GM, FM, CR, and Comp de-energize. When ice level
lowers and BC closes, the icemaker starts operating again.
C-100BAF Series Sequence Flow Chart and Component Operation
1. Freeze Cycle
Power Switch
"ON"
BC closed
STS closed
BCH energized
Comp energized
FM energized
GM energized
Legend: BC–bin control thermostat; BCH–bin control heater; Comp–compressor;
CR–compressor relay; FM–fan motor; GM–gear motor; STS–suction temperature
safety (low water/freeze-up safety); WV–inlet water valve
(auxiliary codes A-1 and earlier)
Refill
Float-operated WV allows
water into reservoir as needed.
BC closed
STS closed
BCH continues
Comp continues
FM continues
GM continues
Low Water/ 2. Shutdown
Freeze-Up Safety
When STS closes,
icemaker restarts at
1. Freeze Cycle.
BC closed
STS open
BCH continues
Comp de-energized
FM de-energized
GM de-energized
17
Bin Full
BC open
STS closed
BCH continues
Comp de-energized
FM de-energized
GM de-energized