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)
- 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 Icemaker for Periods of Non-Use
- VII. Disposal
- VIII. Technical Information
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15) Disconnect the black oat switch connector from the K5 connector on the control board.
16) Check for continuity across the oat switch leads. With the water tank full, the oat
switch should be closed. If the oat switch is closed and the icemaker will not switch
from the 1 minute ll cycle to the initial harvest cycle, replace the control board.
If FS is open, conrm that the water tank is full. If the water tank is not full, check the
water supply, water lters, and inlet water valve. If the water tank is full, follow the steps
in "II.F.2. Float Switch Cleaning." After cleaning FS, check it again. Replace if needed.
Legend: CB–control board; FS–oat switch
2. Float Switch Cleaning
Depending on local water conditions, scale may build up on FS. Scale on the switch can
cause the oat to stick. In this case, FS should be cleaned.
1) Turn off the power supply.
2) Remove the front panel and move the control switch to the "OFF" position.
3) Remove the front insulation panel, then remove splash guard, cube guide B, and cube
guide A. Next, remove the overow cap, overow pipe, and water shield. See Fig. 3.
4) Remove the drain plug and drain the water tank. Replace the drain plug in its correct
position. Be careful not to cross thread it.
5) Replace the water shield, overow pipe, overow cap, cube guide A, cube guide B,
splash guard, and front insulation in their correct positions. NOTICE! Be careful not to
cross thread the overow pipe.
6) Disconnect the vent tube and ush tube from the top of the oat switch, then remove the
oat switch and rubber boot.
7) Remove the retainer rod from the bottom of the oat switch assembly, then remove the
oat. Be careful not to bend the retainer rod excessively when removing it. See Fig. 4.
8) Wipe down the oat switch assembly's housing, shaft, oat, and retainer rod and clean
the inside of the rubber boot and hose with a mixture of 1 part of Hoshizaki "Scale
Away" 25 parts of warm water. Rinse the parts thoroughly with clean water.
9) Reassemble the oat switch assembly and replace it and the rubber boot in their correct
positions. Reconnect the vent tube and the ush tube.
10) Move the control switch to the "ICE" position.
11) Replace the front panel in its correct position.
12) Turn on the power supply to start the
automatic icemaking process.
Legend: CB–control board; FS–oat switch; PM–pump motor
Float
Float Switch
Housing
Retainer Rod
Vent
Shaft
Fig. 4