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 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 Duration) (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 Control 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
- VII. Disposal
- VIII. Technical Information
21
Third occurrence within 36 hr. minimum and maximum freeze times have exceeded
differential parameters. CB yellow "EXT HARVEST" LED starts blinking. Also, If not
reset, CB "POWER OK" LED continues blinking. If reset, CB "POWER OK" LED starts
blinking. Freeze-Time Correction Cycle starts.
Total freeze-time correction cycle last for 90min. At the end of 80min., the nal step
initiates and nal Harvest Pump Time (Harvest Assist) with WV (10-min.) starts. Once
the nal Harvest Pump Time (Harvest Assist) with WV (10-min.) terminates
(90 min. complete), normal freeze cycle begins.
2a) 10-Min. Harvest Pump Time (Harvest Assist) with WV: CB "POWER OK" LED
blinking. CB LEDs 1, 4, 3, and 2 are on and Comp, FMRs, HGVs, PM, and WV
energize. 10-min. timer starts. Once 10-min. timer terminates, CB LEDs 1, 3, and 2 turn
off and Comp, FMRs, HGVs, and PM de-energize. WV continues.
2b) 10-Min. Fill: CB LED 4 on and WV energized. 10-min. timer starts.
2c) Final 10-Min. Harvest Pump Time (Harvest Assist) with WV: CB "POWER OK" LED
blinking. Once 10-min. timer terminates, CB LEDs 1, 4, 3, and 2 are on and Comp,
FMRs, HGVs, and PM energizes. WV continues. 10-min. timer starts. Once 10-min.
timer terminates, normal freeze cycle begins. CB LED 1 on and Comp, FMRs, and PM
continue. HGVs and WV de-energize.
Note: After 3rd Freeze-Time Correction Cycle in 36 hours, CB signals with blinking CB
yellow "EXT HARVEST" LED. Appliance continues normal operation.
CB "POWER OK" LED and CB yellow "EXT HARVEST" LED continue blinking in
normal operation sequence.
3) Appliance Cycle Reset and CB Alarm Reset:
Cycle Reset: Power supply or control switch turned off and on again: Appliance turns
off, then restarts at 1-min. ll cycle.
Alarm Reset: CB "ALARM RESET" pressed during or after a freeze-time correction
cycle with power supply on: Appliance continues cycle with no interruption or reset.
CB red "POWER OK" LED blinking: CB red "POWER OK" LED resets to solid.
CB yellow "EXT HARVEST" LED blinking: CB yellow "EXT HARVEST: LED turns off.
Legend: BC–bin control; CB–control board; Comp–compressor; CT–control transformer;
CV–cleaning valve; DV–drain valve; FMRs–fan motor remote; FS–oat switch;
HGVs–hot gas valves; HM–headmaster (C.P.R.); HPS–high-pressure switch;
LLVs–liquid line valves; MC–magnetic contactor: PM–pump motor;
TXV–thermostatic expansion valve; WV–inlet water valve