Harvest Pump Time (S4 Dip Switch 6); Harvest Pump Timer Operation (S4 Dip Switch 7) - Hoshizaki DKM-500BAJ Service Manual

5. Harvest Pump Time (S4 dip switch 6)

Factory set for proper operation. Do not adjust. Adjustment outside of the factory
default setting may result in damage to the appliance.
The harvest pump time starts with 50 sec. left to go in the harvest time (S4 dip switches
1 & 2) after the thermistor reaches 48°F (9°C) at the evaporator outlet and the control
board reads 3.9 kΩ from the thermistor. The harvest pump time is factory set, and no
adjustment is required.
6. Harvest Pump Time Operation (S4 dip switch 7)
S4 dip switch 7 is used for harvest pump timer operation.
Factory set for proper operation. Do not adjust. Adjustment outside of the factory
default setting may result in damage to the appliance.
Depending on the harvest pump time operation setting, the pump motor either stays
off or is energized the last 50 seconds of harvest. When the pump motor is energized,
water circulates over the evaporator. The inlet water valve is open during harvest for a
maximum of 6 minutes or the length of harvest minus 0 or 50 sec. (determined by the
harvest pump time setting), whichever is shorter.
When S4 dip switch 7 is in the on position and harvest begins, X10, X11, and X12 relays
energize. A latching circuit is created through the X11 and X10 relays. For further details,
see "VIII.C. Wiring Diagrams." 50 sec. before harvest termination, LED 4 turns off, inlet
water valve and X11 relay de-energize. X10 relay remains energized through the latching
circuit and X12 relay remains energized through the pink (P) wire. Next, LED 3 turns on
and control board K1 connector pin #5 (DBU) wire energizes, energizing the pump motor
through the X12 relay for the last 50 sec. of harvest.
NOTICE
S5 Dip Switch Setting Harvest Pump Time
No. 6
OFF
ON
NOTICE
"J" Control Board
S4 Dip Switch Setting
No. 7
OFF
ON
35
50 sec.
25 sec.
Pump Motor
Time (sec.)
Disabled
Enabled