Service Manual
Table Of Contents
- Important Safety Information
- I. Construction and Water/Refrigeration Circuit Diagrams
- 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 Timer (S4 dip switch 1 & 2)
- 3. Pump-Out Timer/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) (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)
- 11. Minimum Harvest Time (S5 dip switch 4)
- 12. Anti-Slush (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
10
II. Sequence of Operation and Service Diagnosis
A. Sequence of Operation Flow Chart
1. Operation Flow Chart
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," "CIRCULATE," 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.
CIRCULATE
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 cleaning valve. This operation is used to circulate cleaner
and sanitizer over both the inside and outside surfaces of the evaporator.
FS check
1 to 3-min. harvest timer in
control (S4 dip switch 1 & 2)
Legend:
BC–bin control
CB–control board
Comp–compressor
DV–drain valve
FMRs–fan motors-remote
FS–oat switch
HGVs-hot gas valves (KMS and SRK)
HPT–harvest pump time
LLVs-liquid line valves (KMS and SRK)
PM–pump motor
WV–inlet water valve
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 restarts for
10/20 sec.
(S4 dip switch 3 & 4)
WV energized
FS open
Comp energized
FMRs energized
HGVs energized
WV energized
Thermistor temperature reaches
48°F (9°C) (3.9 kΩ or less). Harvest
timer starts.
FS open
Comp energized
FMRs energized
PM energized
LLVs energized
HGVs de-energized
FS closed
Comp energized
FMRs energized
HGVs energized
PM de-energizes for 2 sec.,
then restarts for 10/20 sec.
LLVs 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."