E) Harvest Pump Timer (S4 Dip Switch 7); F) Factory Use (S4 Dip Switch 8); G) Freeze Timer (S4 Dip Switch 9 & 10) - Hoshizaki Serenity KMS-822MLH Service Manual

e) Harvest Pump Timer (S4 dip switch 7)

Factory set for proper operation. Do not adjust. Adjustment outside of the
factory default setting may result in damage to the icemaker.
Depending on the harvest pump timer setting, the pump motor energizes and runs the
last 0 or 50 seconds of harvest. When the pump motor is on, water circulates over the
evaporator. The water valve is open during harvest for a maximum of 6 minutes or the
length of harvest minus 0 or 50 seconds (determined by the harvest pump timer setting),
whichever is shorter. When S4 dip switch 7 is in the on position, the drain valve relay
energizes through the control board K1 ten-pin connector pin #5 (DBu wire). The drain
valve relay then energizes the pump motor for the last 50 seconds of harvest.
Note: The drain valve is not energized during the last 50 seconds of harvest because it
shares power with the inlet water valve which de-energizes the last 50 seconds of
harvest. See "III.B. Wiring Diagram."

f) Factory Use (S4 dip switch 8)

Factory set for proper operation. Do not adjust. This must be left in the factory default
position.
g) Freeze Timer (S4 dip switch 9 & 10)
Adjust to proper specification, or the unit 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. After 2 consecutive freeze timer terminations, the control board shuts
down the icemaker. In this case, see "IV.F.3. Low Ice Production" for possible solutions.
The freeze timer is factory set, and generally no adjustment is required. Before changing
this setting, contact your local Hoshizaki distributor or Hoshizaki Technical Support for
recommendations.
CAUTION
S4 Dip Switch Setting
No. 7
ON
OFF
CAUTION
S4 Dip Switch Setting
No. 9 No. 10
OFF OFF
OFF ON
ON OFF
ON ON
19
Pump Motor
Time (seconds)
50
0
Time
(minutes)
60
50
70
60