Service Manual

14
FS check
1 to 3-min. harvest timer in control (S4 dip switch 1 & 2)
• Max. inlet water valve time: 6 min. or the length of harvest minus 50 sec. (S4 dip switch 7), whichever is shorter. • Max. harvest time: 20 min.
FS check
Legend: Comp–compressor DV–drain valve FM–fan motor FMR–fan motor-remote FS–oat switch HGV–hot gas valve LLV–liquid line valve PM–pump motor WV–inlet water valve
"G" Control Board with Harvest Pump Timer Operation Sequence Flow Chart
1. 1-Minute Fill Cycle
Cycle Steps
2. Harvest Cycle
Thermistor in control
3. Freeze Cycle
• Min. freeze time: 5 min. • Max. freeze time: freeze timer setting
(S4 dip switch 9 & 10)
FS in control
4. Pump-Out Cycle
WV energized
FS open
Comp energized FMR energized HGV energized WV energized
Thermistor temperature reaches 48°F (9°C) (3.9 kΩ or less). Harvest timer starts (1 to 3 min.).
FS open
Comp continues FMR continues FM energized LLV energized PM energized HGV de-energized
FS closed
Startup
If FS is open, Comp stops and cycle returns to 1-min. ll.
5-min. minimum freeze timer in control
FS closed
FS opens or freeze timer terminates
Harvest Pump Timer
50 sec.
PM energized WV de-energized
2. "G" Control Board with Harvest Pump Timer Operation
Shutdown and Restart See "II.A.3. Thermostatic and Mechanical Bin Control Shutdown Operation"
Comp continues FMR continues HGV energized PM de-energizes for 2 sec., then DV and PM energize for 10/20 sec. FM de-energized LLV de-energized
• Every 1, 2, 5, or 10
cycles (S4 dip switch 5 & 6)
• Pump motor stops for
2 sec., then energizes for 10/20 sec. (S4 dip switch 3 & 4)
Components Energized when the Control Switch is in the "SERVICE" Position When in the "SERVICE" position, the control switch supplies power to the service switch and the machine is in service mode. The service switch has three positions: "DRAIN," "CIRCULATE" and "WASH." See the information below for details of each function.
DRAIN
Power is supplied to the pump motor and drain valve. This drains the water tank.
CIRCULATE
Power is supplied to the pump motor only. This can be used to circulate cleaner over the outside surface of the evaporator for extended periods of time.
WASH
Power is supplied to the pump motor and wash valve. This is used to circulate cleaner and sanitizer over both the inside and outside surfaces of the evaporator.