Auxiliary Codes A-2 And Later - Hoshizaki C-100BAF Service Manual

2. Auxiliary Codes A-2 and Later

After the power switch is placed in the "ON" position, the steps in the sequence are as
outlined below.
a) Fill Cycle
LF/S and UF/S open, BCH and WV energize. LF/S closes. Nothing happens at this time.
Reservoir continues to fill until UF/S closes.
b) Freeze Cycle
UF/S closes. BCH remains energized. WCR, TDR, GM, FM, CR, and Comp energize. WV
de-energizes. Ice production starts 4 to 6 minutes after Comp energizes depending on
ambient and water conditions. F/S controls WV to refill as needed during the freeze cycle.
The freeze cycle continues until BC shuts down the icemaker or power is turned off to
the icemaker. Refill: As ice is produced, the water level in the reservoir drops and UF/S
opens. When UF/S opens, a latching circuit through LF/S and WCR keeps WCR, TDR,
GM, FM, CR, and Comp energized. When LF/S opens, WCR de-energizes, cutting power
to TDR terminal #5 (O wire) and starting FT. WV energizes. Water fills the reservoir, UF/S
closes. WCR energizes, restoring power to TDR terminal #5 (O wire) and resetting FT.
WV de-energizes. If UF/S remains open longer than 90 seconds, FT terminates, cutting
power to TDR terminal #9 (R wire). GM, FM, CR, and Comp de-energize. WV remains
energized until UF/S closes.
c) 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. WCR, TDR, 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. Fill Cycle
Power Switch
"ON"
BC closed BC closed
LF/S closed
UF/S open
LF/S open UF/S closed
BCH continues
BCH energized
Comp energized
WV energized
FM energized
GM energized
WV de-energized
Legend: BC–bin control thermostat; BCH–bin control heater; Comp–compressor;
CR–compressor relay; FM–fan motor; 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
(auxiliary codes A-2 and later)
2. Freeze Cycle
Refill
FT (in TDR)
Maximum 90 seconds
BC closed
UF/S open
LF/S open
FT starts (90 sec.)
BCH continues
Comp continues
FM continues
GM continues
WV energized
Low Water Safety
When UF/S closes,
icemaker restarts at
2. Freeze Cycle.
90 seconds
BC closed BC closed
LF/S closed UF/S open
UF/S closed FT exceeded
FT terminated BCH continues
BCH continues WV continues
Comp continues Comp de-energized
FM continues FM de-energized
GM continues
GM de-energized
WV de-energized
18
3. Shutdown
Bin Full
BC open
BCH continues
Comp de-energized
FM de-energized
GM de-energized
WV de-energized