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e) Harvest Pump Timer (S4 dip switch 7)
CAUTION
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 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 on, the pump motor is energized through the #5 pin (DBu wire)
on the control board K1 ten-pin connector and the X1 relay (auxiliary code T-0, U-0), X10
relay (auxiliary code U-1 and later). The #5 pin (DBu wire) is used in most applications
to reverse the pump motor or energize the drain valve in pump-out cycles. In this
application, it is used for the pump-out cycle (reverse rotation) as well as the harvest
pump timer (freeze rotation). Therefore, the harvest pump timer relays are needed to
control the pump motor direction during the pump-out and harvest cycles. See "III.B.
Wiring Diagrams."
S4 Dip Switch Setting
Pump Motor
Time (seconds)
No. 7
ON 50
OFF 0
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)
CAUTION
Adjust to proper specication, 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 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 Hoshizaki Technical Support at
1-800-33-1940 for recommendations.
S4 Dip Switch Setting
Time
(minutes)
No. 9 No. 10
OFF OFF 60
OFF ON 50
ON OFF 70
ON ON 60