Service Manual
Table Of Contents
- Important Safety Information
- I. Construction and Water/Refrigeration Circuit Diagram
- II. Sequence of Operation and Service Diagnosis
- III. Controls and Adjustments
- A. Control Board Layout
- B. LED Lights and Audible Alarm Safeties
- C. Settings and Adjustments
- 1. Default Dip Switch Settings
- 2. Harvest Time (S4 dip switch 1 & 2)
- 3. Pump-Out Time/Harvest Time During Pump-Out (S4 dip switch 3 & 4)
- 4. Pump-Out Frequency Control (S4 dip switch 5)
- 5. Harvest Pump Time (Harvest Assist Duration) (S4 dip switch 6)
- 6. Harvest Pump Time (Harvest Assist) (S4 dip switch 7)
- 7. Factory Use (S4 dip switch 8)
- 8. Freeze Timer (S4 dip switch 9 & 10)
- 9. Float Switch Selector (S5 dip switch 1)
- 10. Refill Counter (S5 dip switch 2 and 3)
- 11. Minimum Harvest Time (S5 dip switch 4)
- 12. Slush Control (S5 dip switch 5)
- IV. Refrigeration Circuit and Component Service Information
- V. Maintenance
- VI. Preparing the Appliance for Periods of Non-Use
- VII. Disposal
- VIII. Technical Information
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II. Sequence of Operation and Service Diagnosis
A. Sequence of Operation Flow Chart
1. Operation Flow Chart
FS check
1 to 3-min. harvest timer in
control (S4 dip switch 1 & 2)
Legend:
BC–bin control
CB–control board
Comp–compressor
FM–fan motor
FMR–fan motor-remote
FS–oat switch
HGV–hot gas valve
HPT–harvest pump time
LLV –liquid line valve
PM–pump motor
WV–inlet water valve
Components Energized when the Control Switch is in the "SERVICE" Position
When in the "SERVICE" position, the control switch supplies power to the service switch and the icemaker is in service mode. The service
switch has three positions: "DRAIN," "CIRC." and "WASH." See the information below for details of each function.
DRAIN
Power is supplied to the pump and drain valve. This drains the water tank.
CIRC.
Power is supplied to the pump only. This operation can be used to circulate cleaner and
sanitizer over the outside surface of the evaporator for extended periods of time.
WASH
Power is supplied to the pump and wash valve. This operation is used to circulate cleaner
and sanitizer over both the inside and outside surfaces of the evaporator.
Operation Flow Chart
1. 1-Minute
Fill Cycle
Cycle
Steps
2. Harvest Cycle
• WV time: 6 min. or the length of harvest minus
HPT setting (S4 dip switch 6), whichever is shorter.
• Max. harvest time: 20 min.
Thermistor
in control
3. Freeze Cycle
• Min. freeze time: 5 min.
• Max. freeze time: freeze timer setting
(S4 dip switch 9 & 10).
FS in control
4. Pump-Out Cycle
• Factory set for every
10th cycle
(S4 dip switch 5)
• Pump motor stops for
2 sec., then reverses for
10/20 sec.
(S4 dip switch 3 & 4)
WV energized
FS open
Comp energized
FMR energized
HGV energized
WV energized
Thermistor temperature reaches
48°F (9°C) (3.9 kΩ or less).
Harvest timer starts.
FS open
Comp energized
FM energized
FMR energized
LLV energized
PM energized
HGV de-energized
FS closed
Comp energized
FMR energized
HGV energized
LLV de-energized
PM de-energizes for 2 sec.,
then reverses for 10/20 sec.
FS check
Startup
If FS is open, Comp stops and cycle
returns to 1-Min. ll.
5-min.
minimum
freeze timer in
control
FS closed
FS opens or freeze
timer terminates
50 sec.
PM energized
WV de-energized
Harvest Pump
Time
Slush Control
Thermistor temperature
reaches 36°F (2.2°C)
(5.8 kΩ).
PM de-energized for
10 sec.