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8
II. Sequence of Operation and Service Diagnosis
A. Sequence of Operation Flow Chart
Legend:
AMD–actuator motor down
AMU–actuator motor up
BC–bin control
CBT–control board thermistor
Comp–compressor
ET–evaporator thermistor
FD–full drain (CB Setting 14)
1. Bin Full
Shutdown
and Restart
BC Operation
BC open 10 sec. or more
(BC actuator paddle
engaged). Shutdown
occurs at end of harvest
cycle.
All components
de-energized.
2. Icemaker Off
3. Ice Level Lowered
BC closed 80 sec. or more
(BC actuator paddle
disengaged).
Shutdown and Restart Sequence Flow Chart
"IM" Control Board
1. 30-Sec.
Startup
Cycle
Cycle
Steps
2. Harvest Cycle
• HGV: If CBT≤81°F (27°C) (CB Setting
74), HGV repeatedly energizes 40sec./
de-energizes 40 sec.
• FM: If CBT≥118°F (48°C) (CB Setting 34),
FM operates continuously in harvest cycle
• Max. harvest time: 30 min.
3. Freeze Cycle
• Max. freeze time: 45 min. (CB Setting 6)
HGV energized
HGV continues
AMD energized
Comp energized
Startup
WV energized *2
Comp continues
AMU energized
FM energized
WV energized *3
HGV de-energized
ET≥41°F (5°C)
(CB Setting 1)
Water Tank Closed
(Actuator Motor PS)
*4
PM energized
Comp continues
FM continues
WV energized *4+*5
If CBT>81°F (27°C) (CB
Setting 74) and CBT≤111°F
(44°C) (CB Setting 70), HGV
energizes 5sec./de-energizes
25 sec./energizes 5 sec. (CB
Setting 71, 72)
ET≤-1.3°F (-18.5°C)
(CB Setting 2)
Note
CB
Setting
Initial Harvest and
Initial Freeze after
Power On
Initial Harvest and Initial Freeze after
Bin Control Initiated Restart
Normal Harvest and Freeze
All WT WT>48°F (9°C) WT≤48°F (9°C) WT>48°F (9°C) WT≤48°F (9°C)
*1 NA 20 sec. 0 sec. 0 sec. 20 sec. 20 sec.
*2 10, 11 95 sec. 10 sec. (CB Setting NA) 95 sec. 30 sec. 95 sec.
*3 NA 10 sec. 0 sec. 10 sec. 0 sec. 10 sec.
PD*4 12 30 sec. × 2 30 sec. × 2 30 sec. × 2 30 sec. 30 sec.
PD*5 15 22 sec. × 2 22 sec. × 2 22 sec. × 2 22 sec. 22 sec.
FD*4 12 60 sec. 60 sec. 60 sec. 60 sec. 60 sec.
FD*5 15 44 sec. 44 sec. 44 sec. 44 sec. 44 sec.
*1
Time varies based on
control board calculation
FM–fan motor
HGV–hot gas valve
PD–partial drain (CB Setting 14)
PM–pump motor
PS–position sensor
WT–water temperature
WV–inlet water valve
WV Delay PM Delay
Icemaker restarts at
1.30-Sec. Startup Cycle.