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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C. Settings and Adjustments
NOTICE
Dip switches are factory set. Failure to maintain factory settings may adversely
affect performance and warranty coverage. For more information, contact your
Hoshizaki Service Center.
1. Default Dip Switch Settings
The dip switches are factory-adjusted to the following positions for both the 2A7664-01
and 2A7664-02 control boards:
S4 Dip Switch
Model 1 2 3 4 5 6 7 8 9 10
KMD-860MAJ OFF OFF OFF OFF OFF OFF ON OFF OFF OFF
KMD-860MWJ OFF OFF OFF OFF OFF OFF ON OFF OFF OFF
KMD-860MRJ OFF OFF OFF OFF OFF OFF ON OFF OFF OFF
S5 Dip Switch (Do Not Adjust)
Model
1 2 3 4 5
All Models OFF OFF OFF OFF ON
Freeze Timer (9 & 10)
Pump-Out Frequency Control (5)
Pump-Out Time (3 & 4)
Harvest Timer (1 & 2)
Factory Use (8)
Harvest Pump Time (Harvest Assist) and Freeze-Time Correction (7)
(Do Not Adjust)
1 2 3 4 5 6 7 8 9 10
ON
S4 Dip Switch
"J" Control Board
1 2 3 4 5
ON
S5 Dip Switch (Do Not Adjust)
"J" Control Board
Rell Counter (2 and 3)
Float Switch Selector (1)
Minimum Harvest Time (4)
Anti-Slush (5)
Harvest Pump Time Timer (Harvest Assist) (6)