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2. Sequence Flow Chart
"E" Control Board Sequence Flow Chart
KM-2500SWH3, KM-2500SRH3
Startup begins
here after
5-sec. delay
4. Pump-Out Cycle
• Factory set for every
cycle (S4 dip switch
5 & 6)
• Pump motor stops for
2 sec., then reverses
for 10/20 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
FMR–fan motor-remote
F/S–oat switch
HGV–hot gas valve
LLV–liquid line valve
PM–pump motor
TBC–thermostatic bin control
WV–inlet water valve
1. 1-Minute Fill
Cycle
2. Harvest Cycle 3. Freeze Cycle
WV energized
F/S open
F/S closed
WV continues
Comp energized
FMR energized
HGV energized
Thermistor temp
warms to 48°F (9°C)
(3.9 kΩ or less)
Harvest timer starts
F/S open
Comp continues
FMR continues
LLV energized
PM 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: 20 min.
Thermistor in control
1 to 3-min. timer in control
(S4 dip switch 1 & 2)
• Minimum freeze time: 5 min.
• Maximum freeze time: freeze timer setting
(S4 dip switch 9 & 10
5-min. timer
in control
F/S in control
If F/S is open, compressor stops and cycle returns to 1-Minute Fill Cycle
1. Bin Full
Unit shuts down
within 10 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
"1. 1-Minute Fill Cycle."
TBC closed
TBC open
All components
de-energized
To 1 above
Comp continues
FMR continues
HGV energized
WV energized if dip switch
3& 4 set to 3 off and 4on.
LLV de-energized
PM de-energizes for 2 sec.,
then reverses for 10/20 sec.
F/S open or freeze
timer expires
Cycle Steps