6-8
TEST PROCEDURE/ACTION
Evaporator Fan
Not running.
Not running up to speed.
Open evaporator fan feedback circuit.
Frost blocking evaporator air flow.
Run control diagnostics to check the evapo-
rator fan operation in step 3. The evaporator
fan receives voltage from the main control
board. Voltage should be present at pins 1,
2, 6, & 7 of connector 7 of the main control
board during operation (see the diagram on
page 7-2). A failed evaporator fan motor or
any condition that can mimic a failed motor
will cause the control to run the compressor
100% at 4500 rpm. If voltage is still present
and the evaporator fan is still not operating,
verify evaporator fan jumper harness wiring
(see “Evaporator Fan-Improper Wiring” sec-
tion below). If corrosion is present on the
terminals, replace the evaporator fan jumper
harness.
Improper wiring.
Noisy.
Run control diagnostics to check the defrost
system operation in step 7. The test mode
can be used for a manual defrost cycle to
clear the coil. A frost load as the result of
one or more doors being left open and can
take several days to clear.
Verify the wires connecting from the square
connector of the evaporator fan jumper har-
ness to the bimetal harness. WH/V to WH,
YL/BU to BU, YL/BK to YL, and YL/RD to
RD. If wiring is incorrect, order evaporator
fan kit.
Binding
—Check for the evap fan to be mis-
aligned and for the wire harness to be pull-
ing on the evap fan.
Hitting
—Check for the fan blade hitting the
scroll and realign.
Freezer (FC)
Thermistor
Inoperative.
Reversed wiring.
Check wires and connectors. Thermistor
may be out of range. Run control diagnostics
to check the FC thermistor operation in step
1. Check resistance given in the diagram on
page 7-2. If the thermistor circuit is open, the
control will initiate default run time to hold
temps until service can be performed.
Although extremely remote, the thermistor
wires can be reversed in the connector at
the main control boards. A quick way to con-
firm this is to remove the FC thermistor,
initiate control diagnostics and look for a “2”
in step 1, which is an indication of an open
circuit for the FC thermistor.
Inverter
Not operational.
Compressor not operational.
Check for voltage from the main control
board to the inverter: 3 to 6 VDC on pins 3 &
8 of connector 7.
Check for voltage from the inverter to the
compressor. Input voltage to compressor is
0.02 to 5.5 VDC. Ohm the compressor. Re-
sistance should be 6 to 7
Ω
.
RC = Refrigerator Compartment
FC = Freezer Compartment
COMPONENT
SYMPTOM
Содержание 2003 M
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Страница 81: ...7 1 WIRING DIAGRAMS STRIP CIRCUITS SXS NON DISPENSER WIRING DIAGRAM 115 VOLTS 60 HZ ...
Страница 82: ...7 2 SXS DISPENSER WIRING DIAGRAM ...
Страница 83: ...7 3 BOTTOM MOUNT WIRING DIAGRAM ...
Страница 84: ...7 4 MAIN CONTROL BOARD BLOCK DIAGRAM ...
Страница 85: ...7 5 ELECTRONIC TEMPERATURE CONTROLLED MEAT PAN DIAGRAM ...
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