
TROUBLESHOOTING
78
HIGH VOLTAGE !
D
ISCONNECT
ALL
POWER
BEFORE
SERVICING
OR
INSTALLING
. M
ULTIPLE
POWER
SOURCES
MAY
BE
PRESENT
. F
AILURE
TO
DO
SO
MAY
CAUSE
PROPERTY
DAMAGE
,
PERSONAL
INJURY
OR
DEATH
.
WARNING
W
HEN
REPLACING
THE
ELECTRICAL
BOARD
,
DO
NOT
TOUCH
THE
HATCHED
AREAS
. B
EFORE
INSTALLING
THE
NEW
ELECTRICAL
BOARD
,
BE
SURE
TO
WIPE
THE
GREASE
OFF
THE
REFRIGERANT
TUBING
. E
XERCISE
CAUTION
TO
NOT
DAMAGE
THE
ELECTRICAL
CONNECTIONS
.
D
ISCONNECT
AS
NEEDED
.
CAUTION
UNINSTALL THE ELECTRICAL BOARD
When uninstalling the main electrical board, remove the
screws holding the cover in place. If board replacement is
attempted without following proper uninstallation procedure,
the refrigerant piping might be damaged. Always replace
the grease with new grease on heat sink used for cooling.
Not replacing grease may result in insufficient cooling and
may damage the electrical board.
1. Remove the fixing screw A.
2. Lift the cover and open it in the direction shown in the
figure.
Fixing
Screw A
Cover
Heat Sink for Cooling
Refrigerant Tubing
3. Remove fixing screws B affixing the sheet metal plate.
4. Carefully slide the sheet metal plate with the electrical
board behind the refrigerant tubing as shown.
PCB
MOUNTING
PLATE
PCB
SLIDE
RAIL
PCB ASSY
INSTALL THE ELECTRICAL BOARD
When working on a service port, ensure that no refrigerant
and/or compressor oil is sprayed onto the electrical board.
This could damage the board’s functionality.
1. Wipe the stale grease completely from the installed pip-
ing. If you reinstall the control board, make sure to wipe
clean the heat sink on the board. Coat the surface with
the standard quantity of the specified new grease.
2. Carefully slide the sheet metal plate back in and fix the
screws B.
3. Do not apply force to the parts on the control board. Hold
the control board plate NOT the control board.
4. Ensure that the liquid tube does not come in contact with
any part of the PCB assembly.
5. Gently fit the tube in the heat sink troughs. Ensure good
contact.
6. Close the cover, slide it downwards, fix it with the nails
(two nails) and tighten fixing screws A so that the piping
is tightly connected.
Use the grease that
is provided with the
service parts
.20
.20
Make sure
that you are
coating
evenly
Tightening Torque:
14.1±1.7 lbf-in
Tighten with a driver
until the position where a
tightening torque increases
suddenly.
Then extra-tighten by 30°
to 40º.
Screw A
Nail
Nail