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2. Sequence Flow Chart
a) "E" Control Board: Auxiliary Code T-0, U-0
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)
F/S Check
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.
Legend:
Comp–compressor
FM–fan motor
FMR–fan motor-remote
F/S–oat switch
HGV–hot gas valve
LLV–liquid line valve
TBC–thermostatic bin control
PM–pump motor
WV–inlet water valve
"E" Control Board Sequence Flow Chart
1. 1-Minute Fill
Cycle
2. Harvest Cycle 3. Freeze Cycle
Cycle Steps
WV energized
F/S open
F/S closed
WV continues
Comp energized
HGV energized
FMR 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
FM energized
LLV energized
HGV de-energized
WV de-energized
F/S closed
F/S Check
• WV time: 6 min. or the length of harvest,
whichever is shorter.
• Maximum harvest time: 0 min.
Thermistor in control
to 3-min. timer in control
(S4 dip switch & )
• Minimum freeze time: 5 min.
• Maximum freeze time: freeze timer setting
(S4 dip switch 9 & 0
5-min. timer
in control
F/S in control
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
Unit shuts down
within 0 sec.
after ice contacts
thermostatic bulb.
Shutdown
and Restart
TBC Operation
Ice contacts
thermostatic bulb
2. Icemaker Off
All components
de-energized.
3. Ice Level Lowered
Ice level lowered. No ice
touching thermostatic
bulb. Icemaker starts at
". -Minute Fill Cycle."
TBC closed
TBC open
All components
de-energized
To above
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 open or freeze
timer expires
KM-901MAH, KM-901MWH, KM-901MRH/3