Whirlpool KUIA15PLL*11 manual Operational Modes, Ice Making Cycle, Electrical System, Water System

OPERATIONAL MODES

There are four main operational modes for the	During the Freeze mode, some of the hot gas
ice maker (more detailed operation is found in	that is in the condenser accumulating tube,
the flow chart on page 6-5):	condenses to a liquid, and remains in the ac-
• Freeze	cumulating tube.
	During the later stages of the Freeze mode, as
• Harvest
• Clean	the ice slab forms on the evaporator freezing
	plate, some of the refrigerant passing through
• Service (Diagnostics)
	the evaporator will not evaporate into a gas, but
ICE MAKING CYCLE
	will remain a liquid. This liquid refrigerant will
In addition, there are three possible “Off” cycles	settle in the accumulator, while the refrigerant
for the ice maker. They occur when:	vapor is sucked off through the suction tube at
1. The bin is full of ice and the LED is il-	the top of the accumulator. This accumulated
	liquid refrigerant will eventually be directed to
luminated “ON/OFF” (Idle mode).
	the evaporator to quickly warm the evaporator
2. The "On/OFF” control switch has been
	plate during the Harvest mode.
held for three seconds. The ON/OFF
	NOTE: It is very important that the accumulator
LED will go out.
	is not tilted out of a horizontal position. If moved,
3. The Holiday Mode.
	it could cause compressor failure.
Electrical System
	Water System
Line Voltage is supplied to the electrical control
	The water recirculating pump moves the water
switches and the primary side of the step-down
	from the reservoir pan up to the distributor,
dual transformer. The dual transformer reduces
	where it flows out over the evaporator freez-
120 VAC to 8.75 VAC for the cutter grid and
	ing plate.
the bin light and 12 VAC for the drain and recir-
	Water that does not freeze on the evaporator
culating pumps. The electronic control board
directs 12 VAC to the water recirculating and	plate runs off the front edge, and falls back into
reservoir drain pumps, and 120 VAC to the	the reservoir, where it is recirculated back to
hot gas solenoid, condenser fan motor, and	the water distributor.
compressor. The measured fill water valve will	As the ice slab forms, the minerals in the water
always have 120 VAC on the BK and WH wires	are on the surface of the ice. The water flow-
and 14 VDC on the OR/WH and BK/RD wires.	ing over the top of the ice slab washes these
An evaporator thermistor supplies temperature	minerals back into the water reservoir pan. The
information to the electronic control to determine	water continues to recirculate until the water
when to terminate the harvest cycle.	level in the reservoir drops to the bottom of the
Refrigeration System	water level sensor. When the water level in the
	reservoir drops below the sensor, the control
The hot gas refrigerant, under high pressure, is
	terminates the freeze mode and initiates the
forced through the condenser, where it changes	harvest mode.
into a liquid, and flows through the drier and	The control signals the measured fill valve to fill
capillary tube into the evaporator. Under low
	to the selected water level setting. The mea-
pressure in the evaporator, the liquid refrigerant
	sured fill valve uses a flow meter to accurately fill
absorbs heat from the water flowing over the
	to the correct volume. Thin Ice uses 32 ounces
evaporator as the refrigerant evaporates into
	(954cc), Normal Ice 37 ounces (1106cc), and
a gas. As a low pressure gas, the refrigerant
	Thick Ice 42.5 ounces (1258cc).
flows back through the suction line of the heat
exchanger, to the compressor.

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