GE Consumer & Industrial ZIC360NR, Technical Service Manual

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White Wire (DC Common)
The white wire is the DC common wire used for
testing. During repairs, DC polarity must be
observed. Reversing the DC polarity will cause a
shorted motor and/or board.
Red Wire (Supply)
Each motor uses an internal electronic controller
to operate the motor. Supply voltage from the
main control board remains at a constant
12 VDC.
Blue Wire (Feedback/RPM)
The blue wire feeds rpm (speed) information to
the main control board, allowing the board to
maintain consistent fan speeds. Loss of feedback
from the blue wire will result in the fan accelerating
to maximum speed. Measure the fan rpm using
the frequency between the blue and white wires.
High speed - 205 to 215 Hz (3140 RPM)
Medium speed - 155 to 165 Hz (2415 RPM)
Low speed - 140 to 150 Hz (2160 RPM)
Yellow Wire (Signal)
The yellow wire is the input wire from the main
control board. The main control board provides
8 VDC effective voltage for low speed, 9.2 VDC
effective voltage for medium speed, and 12 VDC
for high speed. The fan will operate in low speed
only when the fresh food thermistor is satisfied.
Note: When testing these motors:
• You cannot test with an ohmmeter.
• DC common is not AC common.
• Verify 2 voltage potentials:
a. Red to white - power for internal controller.
b. Yellow to white - power for fan.
• Observe circuit polarity.
• Motors can be run for short periods using a
9-volt battery. Connect the white wire to the
negative (-) battery terminal only. Connect the
red and yellow wires to the positive (+) battery
terminal.
Some of the low voltage DC
connector labeling on this model
may differ from other models. The
function and diagnostics for these
connectors are identical for all
models.
1
5 1
10
1
9
J1 or J14
J5
6
J3 or J10
J2 or J13
1
DEFROST
K4
2
1
J6
K5
CUSTOM COOL
K7
PAN
HEATER
CRUSHER
K2
WATER
K3
J4 or J16
1 8
J7
AUGER
K1
1
J2
EARTH
EARTH J1
J18
J12
J15
1
J19
J11
J9
Comm. 2-Way Digital Comm. +12V Comm. Common
Damper - Blue Damper - White Damper - Red Damper - Yellow
FF1 Thermistor FF2 Thermistor FZ Thermistor Evaporator Thermistor +5V
Custom Cool D
Custom Cool Damper1 -
+5V
Custom Cool Thermistor
Evaporator Fan Tach.
Fan Common
Evaporator Fan Condenser Fan
Custom Cool Fan
Fan +12V
Inverter Common
Inverter Output
Drain Pan Heater
Not Used
Defrost Heater
Line (L1)
Neutral
FZ Door Switch FF Door Switch
Custom Cool Heater
Auger Motor Interlock
Water Valve
Crusher Solenoid
Auger Motor
J8
Not Used
J4 or J16
J3 or J10
J1 or J14
J2 OR J13