© 2010 Viking Preferred Service
51
Ice Maker (continued)
To ensure power to the ice maker without a meter,
remove the module cover and take note of the test
points.
Test Point Component
N
Neutral side of line
M
Motor connection
H
Heater connection
T
Thermostat connection
L
L1 side of line
V
Water valve connection
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 either a defective ice maker
motor or no power to the ice maker.
If the ejector blades begins to rotate (very slowly)
there is power present to the ice maker. Once the
ice maker begins to turn, remove the jumper. With
power present, verify 0VAC between test points T
and H. If 120 volts is read, the Thermostat is open
(this verifies the thermostat has closed).
To test power to the ice maker, set your volt meter
to test AC voltage and insert your probes into the
“N” and “L” test point on the ice maker face. With
Ice maker switch ON, 120 volts should be read.
If 0 Volts is present, check Ice maker switch. If 0
volts is present at the violet wire, check to see if
voltage is present at the 16-Pin Molex plug (Violet
#3 terminal). If 120 Volts is present, the TCO has
opened and will need to be replaced.
If power is correct to the ice maker, shut the Ice
maker power switch OFF. Verify there is 0 volts
at “N” and “L” then set your multimeter to read
resistance.
To check the
Mold heater,
check for 72
Ω
between
“L” and “H”. If readings are correct, the mold
heater is ok. If infinite
Ω
are read, the heater is open
and you will need to replace the ice maker. Now,
check for the same reading between “L” and “T”.
If 72
Ω
are also read here, the thermostat is closed
as well.
Note:
It will only be closed until it reaches
15˚F ± 2˚.
To check the
Thermostat
, check for 0
Ω
between
“H” and “T”. If the mold temperature is below 5
degrees and the reading is Infinite, the thermostat
is defective.
To check the
Motor
, check for 4.4K ohms between
“M” and “L”. If readings are correct, the motor
winding is ok. If it is defective, replace the ice
maker head.
WARNING
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.
Service Diagnostics and Procedures–Disassembly
N
M
V
L
H
T
