New Ice Maker Control Board (#6100499) - KitchenAid KUIS155H Technical Education

NEW ICE MAKER CONTROL BOARD (#6100499)

NOTE: Due to a quality improvement, the new
control board will replace the older design
(#2185947).
If you are replacing control board #2185947,
please read the improvements listed below. If
you are replacing control board #6100499, you
may disregard the following information.
There are no differences in mounting or wiring
the new control board. Improvements were
made to support low voltage applications.
Additional improvements include the following:
• A 15-minute minimum, and 25-minute
maximum, ice making cycle time limit.
This eliminates the production of ice slabs
that are too thin or too thick. Control
boards with Code Date MGR/0245, (45th
week, 2002), or higher, will allow ice
thickness adjustments by moving the
jumper at P4 (see "Adjusting The Ice
Thickness" on page 8-3).
• During a harvest, the water valve "on
time" is now limited to 1 minute to reduce
water usage. This also eliminates the
condition of the water valve being ener-
gized for an unlimited amount of time if
the evaporator thermistor is not located
correctly, or if the reversing valve has
failed or is unplugged. If the evaporator
thermistor is unplugged, a 25-minute de-
fault freeze, and 4-minute harvest inter-
val will occur.
If the unit stays in harvest mode for more
than 16 minutes, the unit will go into a
failure mode, shutting the unit down, and
flashing the LED light. To get out of failure
mode, shut the unit off, and then back on
again. This will reset the control board. If
the failure was not corrected, the unit will
return to failure mode when the unit
reaches it's 16-minute cycle again. If this
occurs, find the cause of the failure, and
repair it, then unplug the unit to reset the
board.
• The diagnostic mode sequence was
changed, moving the bin and evaporator
thermistor checks to the beginning of the
sequence. The old boards had these
checks at the end of the sequence.
• Whenever the unit has reached a failure
mode, the LED will flash, and the unit will
shut down. If the failure was caused dur-
ing a harvest cycle which lasted more
than 16 minutes, the LED will remain
flashing on & off in half-second incre-
ments. If the failure is caused by a faulty
bin thermistor, (not detected), the LED
will remain flashing on & off in 1-second
increments. These are the only two fail-
ures that cause the unit to reach a shut-
down failure mode.
• During the Clean cycle, the control board
performs the diagnostics first. If the bin
thermistor is not detected, the LED will
flash two times. This is followed by a
3-second delay. If the evaporator ther-
mistor is not detected, the LED will flash
on five times. This will be followed by a
3-second delay. The LED will then come
back on, and remain on for the remainder
of the Clean cycle, and until the unit is
turned back on.
The following check can be done on the
board & thermistors:
- Unplug either thermistor electrical
connection.
- Press the Clean switch. The LED
should flash as described above, de-
pending upon which thermistor is un-
plugged, or if both are unplugged.
For step-by-step operation, see the flow chart
on page 6-5.
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