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) (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 Icemaker for Periods of Non-Use
- VII. Disposal
- VIII. Technical Information
- A. Specification and Performance Data
- 1. KM-1301SAJ
- 2. KM-1301SAJ3
- 3. KM-1301SWJ
- 4. KM-1301SWJ3
- 5. KM-1301SRJ with URC-14F
- 6. KM-1301SRJ3 with URC-14F
- 7. KM-1601SAJ
- 8. KM-1601SAJ3
- 9. KM-1601SWJ
- 10. KM-1601SWJ3
- 11. KM-1601SRJ with URC-22F
- 12. KM-1601SRJ3 with URC-22F
- 13. KM-1900SAJ
- 14. KM-1900SAJ3
- 15. KM-1900SWJ
- 16. KM-1900SWJ3
- 17. KM-1900SRJ with URC-22F
- 18. KM-1900SRJ3 with URC-22F
- 19. KM-2200SWJ3
- 20. KM-2200SRJ3 with URC-22F
- 21. KM-2600SWJ3
- 22. KM-2600SRJ3 with URC-23F
- B. Wiring Diagrams
- A. Specification and Performance Data
40
A. Control Board Layout
"J" Control Board
Part Number
2A7664-01
2A7664-02
"J" Control Board
• K4 (red) Connector
Bin Control
• K1 Connector
Pins #1 through #10
#1, 9 Compressor Relay
#2 Hot Gas Valve, X12 Relay
#3 Fan Motor
Liquid Line Valve
#4 Pump Motor (icemaking)
#5 Pump Motor
(harvest pump timer and
pump-out)
#6 Inlet Water Valve, X11 Relay
#7, 10 Component Power
Supply
#8 Open
• Bin Control Switch
Open LED (yellow)
• Bin Control Switch
Closed LED (green)
• LED 2 (X2 Relay)
LED 2 on:
K1 Connector Pin #2
LED 2 off:
K1 Connector Pin #3
• LED 3 (X3 Relay)
LED 3 on:
K1 Connector Pin #5
LED 3 off:
K1 Connector Pin #4
(energized in freeze)
• LED 4 (X4 Relay)
K1 Connector Pin #6
• LED 1 (X1 Relay)
K1 Connector Pin #1, #9
• K2 Connector
Control Transformer
(10.5VAC)
• S5 Dip Switch
• "ALARM RESET" Button
• S4 Dip Switch
• "OUTPUT TEST" Button
(used to test relays on control board)
• K3 (white) Connector
Thermistor
(harvest control and
high temperature safety)
• K5 (black) Connector
Float Switch
(water level)
• Part Number
• Alarm Buzzer
• Relay LEDs
(4) (indicate which
relays are energized
and which K1
connector pins are
energized
• POWER OK LED
(red) (lights when
10.5VAC is supplied
to K2 connector)
• Ext. Harvest LED
(yellow) (lights
when water line
thermistor initiates
extended harvest)
Not used this model
• Note: 2A7664-01 Does not have the
Freeze-Time Correction program.
Control Board Shown: 2A7664-02