C) Pump-Out Timer (S4 Dip Switch 3 & 4); D) Pump-Out Frequency Control (S4 Dip Switch 5 & 6) - Hoshizaki Serenity KMS-822MLH Service Manual

c) Pump-Out Timer (S4 dip switch 3 & 4)
Factory set. Do not adjust. S4 dip switch 3 & 4 must remain in the factory
default position of 3 off and 4 on. Otherwise, the drain valve will not energize
during pump-out.
At the end of a freeze cycle when a pump-out is called for, the pump motor stops for
2 seconds, then the drain valve relay energizes, energizing the pump motor and drain
valve. Water is removed from the bottom of the tank and sent down the drain. At the
same time, water flows through the small float switch tube to power flush the float switch.
The pump-out drains the water tank for the time determined by the pump-out timer. The
pump-out timer also acts in place of the harvest timer during cycles with a pump-out. The
pump-out timer is factory set, do not adjust.
Note: The drain valve shares power with the inlet water valve during the pump-out cycle.
Therefore, S4 dip switch 3 & 4 must be set to 3 off and 4 on. See "III.B. Wiring
Diagram."
T1: Time to drain the water tank
T2: Harvest timer at pump-out
d) Pump-Out Frequency Control (S4 dip switch 5 & 6)
The pump-out frequency control is factory-adjusted to drain the water tank every
10 cycles, and generally no adjustment is required. However, where water quality is
bad and the icemaker needs a pump-out more often, the pump-out frequency can be
adjusted as shown in the table.
Timing of the first pump-out is dependent on S4 dip switch 5 & 6 settings. See the table
below.
S4 Dip Switch Setting
CAUTION
S4 Dip Switch Setting Time (seconds)
No. 3 No. 4
OFF OFF
ON OFF
OFF ON
ON ON
No. 5 No. 6
OFF OFF
ON OFF
OFF ON
ON ON Every 10 cycles
T1
T2
10 150
10 180
10 120
20 180
Pump-Out
1st Pump-Out
Frequency
Every cycle After 2nd freeze cycle
Every 2 cycles After 3rd freeze cycle
Every 5 cycles After 6th freeze cycle
After 11th freeze cycle
18
Inlet
Water
Valve
closed
closed
open
closed