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 (S1 dip switch 1 & 2)
- 3. Pump-Out Time/Harvest Time During Pump-Out (S1 dip switch 3 & 4)
- 4. Pump-Out Frequency Control (S1 dip switch 5 & 6)
- 5. Harvest Pump Time Duration (Harvest Assist) (S1 dip switch 7 & 8)
- 6. Freeze Timer (S1 dip switch 9 & 10)
- 7. Pump-Out/Drain Selector (S2 dip switch 1)
- 8. Harvest Promotion Control (S2 dip switch 2)
- 9. Minimum Harvest Time (S2 dip switch 3)
- 10. Harvest Completion Detection Control (S2 dip switch 4)
- 11. Overfreeze Detection Control (S2 dip switch 5)
- 12. Slush Control (S2 dip switch 6)
- 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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III. Controls and Adjustments
• A Hoshizaki exclusive control board is employed in KM series appliances.
• All models are pretested and factory adjusted.
• For a control board check procedure, see "II.C. Control Board Check."
NOTICE
• Fragile, handle very carefully.
• The control board contains integrated circuits, which are susceptible to failure
due to static discharge. It is especially important to touch the metal part of the
icemaker when handling or replacing the control board.
• Do not touch the electronic devices on the control board or the back of the control
board.
• Do not short out power supply to test for voltage.
• Always replace the whole control board assembly if it goes bad.