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 Duration (Harvest Assist) (S4 dip switch 6)
- 6. Harvest Pump Time (Harvest Assist)/Freeze-Time Correction (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)
- IV. Refrigeration Circuit and Component Service Information
- V. Maintenance
- VI. Preparing the Appliance for Periods of Non-Use
- VII. Disposal
- VIII. Technical Information
12
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
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 "WASH" Position
The "WASH" position on the control switch is used when cleaning and sanitizing the unit. When in the "WASH" position,
power is supplied to the pump motor. With the cleaning valve closed, the cleaner and sanitizer ow over the outside of the
evaporator plate assembly. With the cleaning valve open, the cleaner and sanitizer ow over both the outside and the inside
of the evaporator plate assembly.
Note: Close the cleaning valve after cleaning and sanitizing are complete, otherwise the icemaker will not restart when the
control switch is placed in the "ICE" position.
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
FMR energized
PM energized
LLV energized
HGV de-energized
FS closed
Comp energized
FMR energized
HGV energized
PM de-energizes for 2 sec.,
then reverses for 10/20 sec.
LLV de-energized
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
Anti-Slush
Thermistor temperature
reaches 36°F (2.2°C)
(5.8 kΩ).
PM de-energized for
10 sec.
When freeze time differential exceeded,
freeze-time correction cycle starts.
See "II.A.3. Freeze-Time Correction
Chart."