– 70 –
(Continued next page)
At the start of the Harvest cycle, the heater will turn
on and remain on until the mold temperature is at
least 36˚F (minimum heater time is 1 minute). The
heater will cycle to maintain at least 36˚F during
harvest.
Once 36˚F is reached, the rake motor will turn on,
making one revolution to eject the cubes while the
control monitors rotation thru the home position.
When the rake motor is back at the home position,
the Water Fill cycle starts by cooling the mold to
40˚F.
The icemaker then fi lls with water for 5.1 seconds
(no additional fi lls are used).
The icemaker then starts another Freeze cycle.
Average time from fi ll to fi ll is 60-70 minutes.
Icemaker Diagnostics
Use Service Diagnostic Mode to enter service
diagnostics. (See Service Diagnostic Mode.) Use
diagnostic code 00 99 to cycle icemaker in the door
and 01 00 to cycle icemaker in the freezer.
The service test will consist of a harvest cycle
followed by a water fi ll cycle.
The harvest cycle will be entered immediately,
regardless of mold temperature or feeler arm
position.
The mold heater will be turned on for a minimum of
20 seconds.
At the end of the harvest cycle, a normal water fi ll
cycle will be initiated.
After the water fi ll cycle, the icemaker will enter the
freeze cycle.
The icemakers operate in much the same way as
previous bottom mount models with one signifi cant
difference: the icemakers are controlled by either
the main control board or the door control board.
The board inside the icemaker does NOT control
operation.
The icemaker in the door is controlled by the door
control board.
The icemaker in the freezer is controlled by the main
control board.
These boards will monitor the mold thermistor, rake
and feeler arm sensors to operate the rake motor,
heater and water valve.
The thermistor has the same resistance value as
previous electronic icemakers.
The icemaker thermistor has a negative coeffi cient―
an increase in temperature will cause a decrease in
resistance.
Temperature
Degrees (F)
Temperature
Degrees (C)
Resistance in
Kilo-Ohms
-40 -40
207 kΩ
35.6 2
25.37 kΩ
39.2 4
23.27 kΩ
50 10
18.07 kΩ
59 15
14.75 kΩ
68 20
12.11 kΩ
77 25
10 kΩ
176 80
1.67 kΩ
Icemaker Sequence
The normal icemaker sequence is to fi ll the mold
with water, wait until the water is frozen, harvest the
ice and then repeat the cycle.
To accomplish this sequence, 3 cycles are defi ned:
Freeze, Harvest and Water Fill.
The Freeze cycle begins after a fi ll, when the mold
temperature drops below 32˚F and will last for a
minimum of 50 minutes.
After the Freeze cycle conditions have been met
and the feeler arm is in the bin not full position, a
harvest cycle will be initiated.
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