Viking RDDFF236 Service Manual page 44

Service Diagnostics and procedures–Disassembly
To avoid risk of electrical shock, personal injury, or death, disconnect electrical power to unit using power
switch before servicing. Wires removed during disassembly must be replaced on proper terminals to insure
correct earth ground and polarization. After servicing, reconnect power using power switch.
Ice Maker (continued)
To make ice, an ice maker needs power, water, and
sub-freezing temperatures.
note: The freezer door switch turns OFF power to
the ice maker when the freezer door is open. It will
be necessary to manually close the freezer door
switch for some troubleshooting steps. Ensure that
the shut off arm is down and instruct customer on its
use if necessary.
To ensure power to the ice maker without a meter,
remove the module cover and take note of the test
points.
V
V
Test Component
point
Neutral side of line
N
Motor connection
M
H Heater connection
Thermostat connection
T
L L1 side of line
V Water valve connection
© 2012 Viking Preferred Service
N
M
H
T
WARNING
Place a 14-gauge jumper wire across test points T
and H. With hands clear of the ice maker, manually
close the freezer door switch. This will put the ice
maker in a manual cycle. If the ejector does not
rotate, this indicates no power to the ice maker.
Trace power from the wall socket to the door switch
and to the connector. Repair circuit and connections
or replace door switch as needed. If the ejector
begins to rotate (very slowly), there is power. With
power present, verify 0 VAC between test points T
and H (this verifies the thermostat has closed). Verify
heater resistance is approximately 264
motor running, verify heater is heating. If no heat is
detected, replace mold assembly. Next ensure water
is supplied to the ice maker. When the ejector blade
gets to the 11 o'clock position, the water valve is
energized for 7.5 seconds.
Verify the water valve has 120 VAC between test
points V and N and approximately 4.75 ounces of
water is dispensed. If voltage is present and water
is not dispensed, verify water supply and fill rate.
CauTIon: DO NOT use a Reverse Osmosis Water
Filtration system. It reduces the water pressure
below 20 psi and the ice maker will not fill. Use of
a Reverse Osmosis system will void the warranty.
Poor water quality can cause ice maker to fail or
produce unacceptable cubes. Install a water filter to
eliminate bad taste, odor, and visible contaminates.
Mineral content or sand can restrict screen in water
fill valve or particles of sand can keep valve from
seating properly.
If water valve does not operate properly, the
following could occur: no ice production, small
or hollow ice cubes, flooding of ice container.
Mineral content can cause lime build up in the mold,
wicking of water over the mold and poor
. With
Ω
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