Water And Ice System - Whirlpool WRF954CIHV Service Manual

The water and ice system receives household supplied water,
filters the water, and makes it available to the water dispenser,
in-door ice maker, and on some models, a second ice maker in
the freezer.
Water Supply
Water is supplied into the refrigerator through an isolation valve,
directed to a water tank, then filtered and sent to the dual valve
controlling water flow to the water dispenser and Ice Maker.
On models with a freezer ice maker, filtered water is sent to a 'T'
fitting which directs water to the dual valve, and a second single
valve for the freezer ice maker.
Isolation Valve
The isolation valve is located in the machine compartment on
the right rail. The valve is normally closed. The valve only opens
when water is being provided to the water dispenser, or either
ice maker.
The valve is opened by 115 VAC power supplied from GF2 board,
P12-4.
Water Filter
The outlet of the water reservoir is directed to the water filter.
The water filter is located behind the water filter door at the
front left bottom of the RC.
The water filter supply line, and the rear of the water filter
housing are heated to prevent condensation and freezing.
The dispenser UI tracks water dispensed and age of the filter
providing water filter indication on the dispenser UI. Water filter
indication information is given in below table.
Indicator Gallons Dispensed
No Indicator
"Order Filter" 161 - 200
"Replace Filter"
Single Ice Maker Models
The water filter outlet is directed to the dual valve. The dual
valve directs the water supply to the water dispenser, or in-door
ice maker through individual valves.
Dual Ice Maker Models
The water filter outlet is directed to a 'T' fitting. The 'T' fitting
directs water to the dual valve and to the freezer ice maker fill
valve.
For Service Technician Use Only

Water and Ice System

Filter Age (Days)
0 - 160 0 - 144
145 - 180
>200 >180
A
From Water
Filter
A. Freezer IM Valve
B. ID IM Valve
C. Water Valve
Water Dispensing
The Dispenser UI is responsible for dispensing water to the in-
water dispenser. The GF2 board controls water dispensing to the
in-door ice maker, and freezer ice maker (some models).
In-Door Water Dispenser
The dispenser is controlled by the front paddle of a stacked dual
paddle, or by the measured fill feature available on the dispenser
UI.
When water is requested the dispenser UI sends the request to
the GF2 board, which opens the isolation valve. The dispenser UI
opens the low voltage Water Valve.
The GF2 board supplies 115 VAC to GF2 board, P12-4, opening
the isolation valve.
The dispenser UI supplies 11.5 VDC dispenser UI, J8-5, opening
the water valve and dispensing water.
In-Door Ice Maker
The dispenser UI controls all aspects of the in-door ice maker,
including the Fill Cycle. The ice maker Fill Cycle is 10 seconds,
filling the ice tray with about 3.2 oz. (100 ml) of water.
During a Fill Cycle, the Dispenser UI communicates to the GF2
board. The GF2 board supplies 115 VAC to P12-4, opening
the Isolation Valve. At the same time, the GF2 board supplies
115 VAC to P3-3, opening the Water Valve for the In-Door Ice
Maker.
After 10 seconds, the Dispenser UI instructs the GF2 board to end
the Fill Cycle, the GF2 board removes power to the valve, ending
the Fill Cycle.
Freezer Ice Maker
The Freezer Ice Maker is controlled by the GF2 board. This Fill
cycle is 10 Seconds, filling the ice tray with about 3.2 oz. (100ml)
of water.
French-Door Bottom Mount Refrigerator
DIAGNOSTICS
B
From Reservoir
to Water Filter
C
n
1-15