Viking VCSB48, Service Notebook

Page: 23 / 33

23
ICE MAKER
Operation
Thermostat closes when temperature reaches 17
° ±
3
°
F (-8.3
° ±
1.5
°
C). Current flows through
thermostat to motor. See “Ice Maker Wiring
Diagram”. Motor is linked with drive gear. From
module, there are copper contacts that ride on copper
strips on backside of drive gear. As the drive gear
rotates, contacts will make or break a circuit (tract) to
the copper strips to operate ice maker.
All components can be tested without removing ice
maker or moving refrigerator away from installation.
Remove cover.
Test points are identified on module:
N = Neutral side of line
M = Motor connection
H = Heater connection
T = Thermostat connection
L = L1 side of line
V = Water valve connection
Specifications
Mold heater: 185 watts, 264 ohms
Thermostat: Close 17
±
3
°
F (-8
±
1
°
C)
(Bimetal) Opens 32
±
3
°
F (0
±
1
°
C)
Water fill: 140 cc, 7.5 sec.
Motor cycle Stamped in circuit.
Plug in connectors
One revolution of blades takes
3 minutes plug stall time on ice
(eject and water fill)
Testing Procedures
Verify ice maker has power, shut off arm is down,
and freezer is cold enough to close bimetal
thermostat.
•
Test point L and N will verify 120 volts to ice
maker module.
•
Test point T and H will verify bimetal
thermostat is open or closed.
•
Verify test probes go into test points ½
inch (1.25 cm).
1. Short T and H with a shunt (insulated
14 gauge wire with ends stripped back
5/8 inch (1.6 cm) to run motor. If
motor runs. Replace bimetal
thermostat. If motor does not run,
replace module.
2.
Leave jumper in for half of revolution.
Touch heater mold. If heater mold
feels warm, heater is working properly
3.
Remove jumper. Water valve will be
energized in last half of revolution if
mold heater has not failed.