8
REPLACING THE BOARD
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 with-
out 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 fixing screw A.
2. Lift the cover and open it in the direction shown in figure
below.
Fixing
Screw A
Cover
Heat Sink for Cooling
Refrigerant Tubing
3. Remove the four fixing screws from the sheet metal plate.
4. Carefully slide sheet metal plate with electric board behind
the refrigerant tubing.
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 piping. If
you reinstall the electrical 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.
3. Do not apply force to the parts on the PCB. Hold the PCB plate
NOT the PCB.
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 con-
tact.
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