10
REPLACING THE CONTROL BOARD (2, 3, & 4 TON ONLY)
WARNING
HIGH VOLTAGE
DISCONNECT ALL POWER BEFORE SERVICING
OR INSTALLING THIS UNIT. MULTIPLE POWER
SOURCES MAY BE PRESENT. FAILURE TO DO SO
MAY CAUSE PROPERTY DAMAGE, PERSONAL IN-
JURY OR DEATH.
CAUTION
WHEN REPLACING THE CONTROL BOARD, DO NOT TOUCH THE
HATCHED AREAS. BEFORE INSTALLING THE NEW CONTROL
BOARD, BE SURE TO WIPE THE GREASE OFF THE REFRIGERANT
TUBING. EXERCISE CAUTION TO NOT DAMAGE THE ELECTRICAL
CONNECTIONS. DISCONNECT AS NEEDED.
Uninstall the control board
When uninstalling the main control 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
damage the control board.
1.
2. Lift the cover and open it in the direction shown in the
3.
4. Carefully slide the sheet metal plate with the control
board behind the refrigerant tubing as shown.
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B
Install the control board
When working on a service port, ensure that no refrigerant
and/or compressor oil is sprayed onto the control 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
2.
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 control board assembly.
5.
is good contact.
6.
is tightly connected.
Use the grease that
is provided with the
service parts
.20
.20
Make sure
that you are
coating
evenly
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