KM-650MAH-E Service manual - Hoshizaki
KM-650MAH-E Service manual - Hoshizaki
KM-650MAH-E Service manual - Hoshizaki
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2. Sequence Flow Chart<br />
a) "E" Control Board:<br />
<strong>KM</strong>-320MAH-E and <strong>KM</strong>-<strong>650MAH</strong>-E Auxiliary Code U-0 and Earlier<br />
<strong>KM</strong>-515MAH-E Auxiliary Code U-1 and Earlier<br />
"E" Control Board Sequence Flow Chart<br />
<strong>KM</strong>-320MAH-E, <strong>KM</strong>-515MAH-E, <strong>KM</strong>-<strong>650MAH</strong>-E<br />
4. Pump-Out Cycle<br />
• Factory set for every<br />
10th cycle (S4 dip<br />
switch 5 & 6)<br />
• Pump motor stops<br />
for 2 sec., then<br />
reverses for 10/20<br />
sec. (S4 dip switch<br />
3 & 4)<br />
3. Freeze Cycle<br />
• Minimum freeze time: 5 min.<br />
• Maximum freeze time: freeze<br />
timer setting<br />
(S4 dip switch 9 & 10)<br />
5-min.<br />
minimum F/S in control<br />
freeze timer in<br />
control<br />
2. Harvest Cycle<br />
• Maximum inlet water valve time: 6 min.<br />
• Maximum harvest time: 20 min.<br />
1. 1-Minute<br />
Fill Cycle<br />
Cycle<br />
Steps<br />
1 to 3-min. harvest<br />
timer in control<br />
(S4 dip switch 1 & 2)<br />
Thermistor<br />
in control<br />
Startup<br />
F/S closed<br />
F/S check<br />
F/S closed<br />
Comp continues<br />
HGV energized<br />
WV energized (dependent on<br />
pump-out timer setting)<br />
PM de-energizes for 2 sec.,<br />
then reverses for 10/20 sec.<br />
FM de-energized<br />
LLV de-energized<br />
F/S open or<br />
freeze timer<br />
terminates<br />
F/S check<br />
Comp continues<br />
FM energized<br />
LLV energized<br />
PM energized<br />
HGV de-energized<br />
WV de-energized<br />
Thermistor temperature<br />
reaches 48°F (9°C) (3.9<br />
kΩ or less). Harvest<br />
timer starts (1 to 3 min.).<br />
F/S open<br />
WV continues<br />
Comp energized<br />
HGV energized<br />
WV energized<br />
F/S open<br />
17<br />
If F/S is open, Comp stops and cycle returns to 1-min. fill.<br />
Legend:<br />
Comp–compressor<br />
FM–fan motor<br />
F/S–float switch<br />
HGV–hot gas valve<br />
LLV–liquid line valve (<strong>KM</strong>-515MAH-E)<br />
PM–pump motor<br />
TBC–themostatic bin control<br />
WV–inlet water valve<br />
3. Ice Level Lowered<br />
No ice touching<br />
TBC bulb.<br />
Icemaker starts at<br />
"1. 1-Minute Fill Cycle."<br />
2. Icemaker Off<br />
All components<br />
de-energized.<br />
1. Bin Full<br />
Within 10 sec.<br />
after ice contacts<br />
TBC bulb,<br />
icemaker shuts<br />
down.<br />
Shutdown<br />
and Restart<br />
To 1 above<br />
TBC<br />
Operation<br />
TBC closed<br />
TBC open<br />
All components<br />
de-energized<br />
Ice contacts TBC bulb<br />
Components Energized when the Control Switch is in the "WASH" Position<br />
The "WASH" position on the control switch is used when cleaning and sanitizing the icemaker. When in<br />
the "WASH" position, power is supplied to the pump motor. With the cleaning valve closed, the cleaner and<br />
sanitizer flow over the outside of the evaporator plate assembly. With the cleaning valve open, the cleaner and<br />
sanitizer flow over both the outside and the inside of the evaporator plate assembly.<br />
Note: Close the cleaning valve after cleaning and sanitizing are complete, otherwise the icemaker will not<br />
restart when the control switch is placed in the "ICE" position.
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