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b) "G" Control Board: Auxiliary Code U-1 and Later
• WV time: 6 min. or the length of harvest minus 0 or
50 sec. (S4 dip switch 7), whichever is shorter. DO
NOT ADJUST S4 dip switch 7 on this model.
• Maximum harvest time: 0 min.
F/S check
to 3-min. timer in control
(S4 dip switch & )
Legend:
Comp–compressor
FM–fan motor
FMR–fan motor-remote
F/S–oat switch
HGV–hot gas valve
LLV–liquid line valve
MBC–mechanical bin control
PM–pump motor
WV–inlet water valve
Components Energized when the Control Switch is in the "WASH" Position
The "WASH" position on the control switch is used when cleaning and sanitizing the unit. When in the "WASH" position, power is
supplied to the pump motor. With the cleaning valve closed, the cleaner and sanitizer ow over the outside of the evaporator plate
assembly. With the cleaning valve open, the cleaner and sanitizer ow over both the outside and the inside of the evaporator plate
assembly.
Note: Close the cleaning valve after cleaning and sanitizing are complete, otherwise the unit will not restart when the control
switch is placed in the "ICE" position.
"G" Control Board Sequence Flow Chart
1. 1-Minute
Fill Cycle
Cycle Steps
2. Harvest Cycle
Thermistor in
control
3. Freeze Cycle
• Minimum freeze time: 5 min.
• Maximum freeze time: freeze timer setting
(S4 dip switch 9 & 0)
F/S in control
4. Pump-Out Cycle
• Factory set for every
0th cycle (S4 dip
switch 5 & 6)
• Pump motor stops
for sec., then
reverses for 0/0
sec. (S4 dip switch
3 & 4)
WV energized
F/S open
WV continues
Comp energized
FMR energized
HGV energized
Thermistor temperature
reaches 48°F (9°C) (3.9 kΩ
or less). Harvest timer starts.
F/S open
Comp continues
FMR continues
PM energized
FMS energized
LLV energized
HGV de-energized
F/S closed
Comp continues
FMR continues
HGV energized
PM de-energizes for sec.,
then reverses for 0/0 sec.
FM de-energized
LLV de-energized
F/S check
Initial startup
begins here
after 5-sec.
delay
If F/S is open, compressor stops and cycle returns to -Minute Fill Cycle
1. Bin Full
Shutdown Delay:
• Fill Cycle–5 sec. after activation.
• Harvest Cycle–At the end of the harvest cycle, or up to 5 sec. into the
freeze cycle if activated at the end of the harvest cycle.
• Freeze Cycle–5 sec. after activation if activated at least 5 sec. before the
5-min. short cycle protection timer expires. Otherwise, at the end
of the next harvest cycle.
Shutdown
and Restart
MBC Operation
MBC open
Green "BC CLOSED" LED off
Yellow "BC OPEN" LED on
Yellow "BC OPEN" LED continues.
All components de-energized
5-min. timer
in control
F/S closed
F/S open or freeze
timer expires
2. Icemaker Off
All components
de-energized.
3. Ice Level Lowered
Ice level lowered. No ice
pressing against MBC actuator
paddle. Icemaker starts at
". -Minute Fill Cycle."
To above
MBC closed
Green "BC CLOSED" LED on
Yellow "BC OPEN" LED off
0 or 50 sec.
PM energized
WV de-energized
Harvest Pump
Timer
KM-901MAH, KM-901MWH, KM-901MRH/3