– 9 –
Control Panel
The control panel is held in place by 2 Phillips-
head screws.
Caution:
When reinstalling the control panel,
make sure control panel wires are routed properly
to avoid pinching.
Logic Board
The logic board is located behind the control
panel.
Run diagnostic mode
02
to test the link between
the logic board and power supply board. (
See
Diagnostics and Service Information
.)
Troubleshooting the Logic Board
If the compressor is not operating and the display
is not illuminated:
Check for 5 VDC between pin #1 and pin #4
on the logic board while it is connected.
If it is less than 5 VDC, disconnect the
connector from the logic board. Measure
the voltage between pin #1 and #4 of the
connector. If this voltage is less than 5 VDC,
there may be a problem with the wiring or
power supply board.
Check the voltage between pin #1 and pin #4
at K11 on the power supply board to continue
troubleshooting.
1.
2.
3.
Caution:
The lock tabs on all low-voltage wire
connectors on the power supply board and
logic board are fragile. The tabs can break if
excessive pressure is applied when unplugging
the connector.
Power Supply Board
The power supply board is housed in a sliding
tray above the machine compartment. The tray is
held in place by 2 Phillips-head screws.
Power Supply Board
K1
K2
K3
K4
K6
K11
K13
K9
K5
DAMPER
LOGIC BD.
EVAP.
FAN
DMPR.
HEATER
FF + EVAP NTC
FZ NTC
J2
J3
POWER
ICE MAKER
LIGHT
FILL TB + DEF
HEATERS
AC SIDE
DC SIDE
K14
(
Continued next page
)
K11
1
2
3
4
BROWN
BLUE
LOGIC
BOARD
WHITE
BLACK
+5V
CL
K
D
ATA
COM
Power Supply Board
REED DOOR SW
.
