C) Pump-Out Timer (S4 Dip Switch 3 & 4); D) Pump-Out Frequency Control (S4 Dip Switch 5 & 6) - Hoshizaki KM-2500SRH3 Service Manual

c) Pump-Out Timer (S4 dip switch 3 & 4)
When a pump-out is called for, the pump motor stops after the preceding freeze cycle.
The pump motor energizes 2 seconds later in the reverse direction, taking water from
the bottom of the tank and forcing pressure against the check valve seat allowing water
to go through the check valve and down the drain. At the same time, water flows through
the small float switch tube to power flush the float switch. The pump motor 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, and generally no adjustment is required. However, where water quality is bad and
the icemaker needs a longer pump-out time, the pump-out timer can be adjusted. The
pump-out timer control can be set to pump-out for 10 or 20 seconds.
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 set to drain the water tank every cycle, and
generally no adjustment is required. The pump-out frequency control can be set to have
a pump-out occur every cycle, or every 2, 5, or 10 cycles.
The first pump-out occurs after the 1st freeze cycle.
S4 Dip Switch Setting
No. 3 No. 4
OFF OFF
ON OFF
OFF ON
ON ON
S4 Dip Switch Setting
No. 5 No. 6
OFF OFF
ON OFF
OFF ON
ON ON
Time (seconds) Inlet
Water
T1 T2 Valve
10 150 closed
10 180 closed
10 120 open
20 180 closed
Frequency
every cycle
every 2 cycles
every 5 cycles
every 10 cycles
20