2
DISPLAY CABLE
RTX
RTX
Display Control Card
(New in the controller)
Remove the
display unit
cover
Screw to
fix unit
to wall
ON Button
Power ON
Light
Display
2.8 meters
(9.2 ft)
RTX Display Unit
Insert the
display cable
into the RTX
display unit
A06469
Fig. 2
−
Connecting Display Unit Cable
to RTX Display Unit
INSTALLATION OF DISPLAY ADAPTER CARD
1. Follow these instructions to install the wall control adapter
circuit board.
2. Installing the wired controller requires the replacement of
the existing circuit board with the wall control adapter
circuit board included in the kit.
3. Use the existing wireless remote to turn off the unit.
4.
Disconnect the power supply.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Before beginning any modification or installation of this kit,
be sure the main electrical disconnect is in the OFF position.
Ensure power is disconnected to the fan coil unit. On some
systems both the fan coil and the outdoor unit may be on the
same disconnect. Tag the disconnect switch with a suitable
warning label. There may be more than one disconnect.
!
WARNING
5. Remove the front grille (see Fig. 3)
A06470
Fig. 3
−
Remove Front Grille
6. Carefully close the louvers.
7. Remove the two screws from the electrical box cover. (See
Fig. 4.)
FILTER
IR
RECEIVER
POWER/AIRCOND
TIMER
FUSE
FUSE
AUTO/OFF
FILTER RESET
SERVICE LED
A06471
Fig. 4
−
Remove Screws From Electrical Box Cover
8. Remove the electrical box cover.
9. Remove the two screws from above the air vents
NOTE
: Some models have three screws.
10. On the bottom of the air conditioner, there are three
indicator triangles. Press gently on the triangles with a
downward motion (see Fig. 5).
FILTER
IR
RECEIVER
POWER/AIRCOND
TIMER
FUSE
A06472
Fig. 5
−
Press Downward on Indicator Triangles
11. Make sure that the louvers are closed. Remove the air
conditioner’s front panel and place it aside.
12. Remove the screw that holds the control unit in place (see
Fig. 6).
53DS
−
900
−−−
091
