Sub-Zero UC-24 series Service Manual page 31

Icemaker Information
MODULAR ICEMAKER
The model UC-24C utilizes a "modular icemaker." The icemaker operation is not complex, however, an understand-
ing of its cycle of operation is necessary in order for a serviceman to make a proper diagnosis.
Modular Icemaker Operation
When the icemaker thermostat has sensed temperatures of 17°F, the thermostat closes. At this time, the current
now has a path through the thermostat to the motor. The motor is linked with the drive gear. From the module,
there are copper contacts that ride on copper strips on the backside of the drive gear. (See Figure 6-1) As the drive
gear rotates, these contacts from the module will make or break a circuit (track) to the copper strips to generate the
icemaker cycle.
Contact C
(Holding Switch)
Contact A
(Water Valve)
Contact B
(Heater / Thermostat)
#7003933 - Revision B - November, 2007
Under Counter (UC-24) Series
Contact D
(Timer)
Figure 6-1. Modular Icemaker Electrical Schematic
Contact A
V
TP
72
TP
Contact B
H
Thermostat
M
Contact C
Contact D
6-2
Neutral
Water Valve
(White)
Green
TP
N
Ω Htr.
TP
Shut-Off
Switch
T
On (Dn)
TP Off (Up)
4400 Ω Timer
Mtr.
Power
(Pink)
TP
L