Service Manual
Table Of Contents
- Important Safety Information
- I. Construction and Water/Refrigeration Circuit Diagrams
- II. Sequence of Operation and Service Diagnosis
- III. Settings 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)/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
- V. Maintenance
- VI. Preparing the Appliance for Periods of Non-Use
- VII. Disposal
- VIII. Technical Information
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5b) Harvest Pump Timer – LEDs 1, 3, and 2 are on. When the thermistor reaches 48°F
(9°C), CB reads 3.9 kΩ from the thermistor and turns harvest termination over to the
harvest timer (S4 dip switch 1 & 2 and S5 dip switch 4). When WV2 de-energizes, LED
4 turns off, X12 relay de-energizes. LED 3 turns on and X11 relay energizes, allowing
PM to energize. Comp, FMRs, HGVs, X10, and X13 relays continue.
Diagnosis: Place a thermometer on the suction line next to the thermistor. Has it
warmed to 48°F (9°C) or warmer? Conrm thermistor status. See "II.G. Thermistor
Check." If the thermistor reading is in proper range, dip switch 7 is on, and PM does not
energize before harvest terminates, replace CB. If WV2 continues, check for 115VAC
at CB K1 #6 (O) to neutral (W). If 115VAC is present, and LED 4 is off, replace CB.
If 115VAC is not present, and WV2 continues, check WV2 diaphragm for leaking by.
Clean or replace. If LED 3 is on and PM is not energized, check for 115VAC at X11 relay
terminal #8 (DBU) to neutral (W). If 115VAC is not present at X11 terminal relay
#8 (DBU), replace CB. If 115VAC is present, check for 115VAC at X11 relay terminal
#4 (P) to neutral (W) and X11 relay terminal #6 (R). If 115VAC is present at X11 relay
terminal #4 (P) and not at X11 relay terminal #6 (R), replace X11 relay. If 115VAC is
present at X11 relay terminal #6 (R), check control switch contact continuity between
terminals #6 (R) and #5 (W/R). If contacts are open, replace control switch. If contacts
are closed and 115VAC is present between control switch terminal #5 (W/R) and neutral
(W), check PM capacitor and motor winding continuity.
5c) Initial Harvest Cycle Termination Diagnosis: When the thermistor reaches 48°F
(9°C), CB reads 3.9 kΩ from the thermistor and turns harvest termination over to
the harvest timer (S4 dip switch 1 & 2 and S5 dip switch 4). Check discharge line
temperature. For a thermistor check, see "II.G.Thermistor Check." Once harvest timer
terminates, LED 3 & 2 turn off and freeze cycle starts. If 1-min. ll cycle starts after
harvest timer terminates, check that FS is clean and operating properly, see "II.F. Float
Switch Check and Cleaning." If FS is closed, CB proceeds to the next cycle. Ifnot,
replace CB.
Note: The minimum total time allowed by CB for a complete harvest cycle is based on
S5 dip switch 4. Maximum harvest time allowed is 20 min.
NOTICE! S4 dip switch 7 must remain on. Otherwise, PM will not energize during
the last seconds of harvest.