Service Manual
Table Of Contents
- Important Safety Information
- I. Construction and Water/Refrigeration Circuit Diagrams
- 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) (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 Appliance for Periods of Non-Use
- VII. Disposal
- VIII. Technical Information
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8. Freeze Timer (S4 dip switch 9 & 10)
NOTICE
Adjust to proper specication, or the icemaker may not operate correctly.
The freeze timer setting determines the maximum allowed freeze time to prevent
possible freeze-up issues. Upon termination of the freeze timer, the control board initiates
the harvest cycle or pump-out cycle. After 2 consecutive freeze timer terminations, the
control board shuts down the icemaker. In this case, see "II.I.3. Low Ice Production"
for possible solutions. The freeze timer is factory set and no adjustment is required.
Before changing this setting, contact Hoshizaki Technical Support at 1-800-233-1940 for
recommendations.
S4 Dip Switch Setting Time
(min.)
No. 9 No. 10
OFF OFF 60
OFF ON 50
ON OFF 70
ON ON 75
9. Float Switch Control Selector (S5 dip switch 1)
NOTICE
Do not adjust. This must be left in the factory default position or the icemaker will
not operate correctly. The KMS-1122MLJ uses a single oat switch with no rells.
Float switch selector used in applications where rell is required in the freeze cycle.
Rells set by S5 dip switch 2 and 3. Note: In single oat switch with upper oat operation
only 1 rell allowed. (reword).
• Single oat switch application:
• With S5 dip switch 1 in the "OFF" position, control board monitors the lower oat switch for
rell operation.
• With S5 dip switch 1 in the "ON" position, the control board monitors the upper oat switch
for rell operation. In this case no upper oat switch exists, therefore the control board
reads an open upper oat switch immediately when the freeze cycle starts and initiates a
rell. Since there is no upper oat switch to close and terminate the rell, the rell lasts for
a maximum of 1-min. During the 1-min. rell, LED 4 is on.
• Double oat switch application: Float switch control selector determines which oat
switch (upper or lower) the control board monitors for rell control during the freeze
cycle.
S5 Dip Switch Setting
Bottom or Top Float Switch ControlNo. 1
OFF Bottom Float Switch Control
ON
Top Float Switch Control
(this setting is ignored if rell counter
(S5 dip switch 2 and 3) set to 0)