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• Arrange the cables as illustrated below.
(3) Attach the connector cover.
Screw
8.3. Attach the intake grille
The installation is the reverse of "REMOVING THE INTAKE GRILLE".
The intake grille can be rotated and installed 4 ways to suit the user's preference.
The louver angle cannot be changed if the power is not on, (If moved by hand, it may be
damaged.)
The grille assembly is directional relative to the air conditioner body.
Install so that there is no gap between the grille assembly and the air conditioner body.
9. TEST RUN
9.1. Test run using Outdoor unit (PCB)
• Refer to the Installation Manual for the outdoor unit if the PCB for the outdoor unit is to
be used for the test run.
9.2. Test run using Remote Controller
• Refer to the Installation Manual for the remote controller to perform the test run using the
remote controller.
• When the air conditioner is being test run, the OPERATION and TIMER indicator lamps
flash slowly at the same time.
10. CHECK LIST
Pay special attention to the check items below when installing the indoor unit(s). After
installation is complete, be sure to check the following check items again.
CHECK ITEMS
Has the indoor unit been installed cor-
rectly?
Has there been a check for gas leaks
(refrigerant pipes)?
Has heat insulation work been completed?
Does water drain easily from the indoor
units?
Is the voltage of the power source the
same as that indicated on the label on the
indoor unit?
Are the wires and pipes all connected
completely?
Is the indoor unit earthed (grounded)?
Is the connection cable the specified
thickness?
Are the inlets and outlets free of any
obstacles?
Does start and stop air conditioner op-
eration by remote control unit or external
device?
After installation is completed, has the
proper operation and handling been
explained to the user?
Connector cover
CAUTION
If not performed correctly
Vibration, noise, indoor unit
may drop
No cooling, No heating
Water leakage
Water leakage
No operation, heat or burn
damage
No operation, heat or burn
damage
Short circuit
No operation, heat or burn
damage
No cooling, No heating
No operation
11. ERROR CODES
If you use a wired type remote controller, error codes will appear on the remote controller
display. If you use a wireless remote controller, the lamp on the photodetector unit will
output error codes by way of blinking patterns. See the lamp blinking patterns and error
codes in the table below.
Error indications
OPERATION
TIMER lamp
lamp (green)
(orange)
(1)
(1)
(1)
(2)
(2)
(3)
(3)
(3)
(10)
(4)
(4)
(5)
(5)
(5)
(9)
(15)
(10)
(13)
Display mode
( )
CHECK
BOX
Wired remote controller display
UTY-RNRUZ* (2-wire type)
Mode
Set Temp.
Status
Touch the [Status].
For more information, refer to the installation manual of the remote controller.
For details on marking the ERROR CODES, please refer to the Manual of "IR Receiver
Unit" or "Wired Remote Controller".
Wired remote
controller
FILTER lamp
error code
(red)
Remote controller communi-
(2)
cation error
Network communication
(4)
error
Peripheral unit communica-
(6)
tion error
Indoor unit address setting
(6)
error
Connection unit number er-
ror in wired remote controller
(9)
system
Indoor unit power supply
(1)
abnormal
Indoor unit main PCB error
(2)
Indoor unit communication
circuit (wired remote control-
ler) error
Indoor unit room temp.
(1)
thermistor error
Indoor unit heat ex. temp.
(2)
thermistor error
Indoor unit fan motor 1 error
(1)
Indoor unit coil (expansion
(2)
valve) error
Indoor unit water drain
(3)
abnormal
Outdoor unit miscellaneous
error
Poor refrigerant circulation
(8)
RB unit error
(1)
:
0.5 s ON / 0.5 s OFF
:
0.1 s ON / 0.1 s OFF
:
Number of flashing
Touch the [Next Page] (or [previous page])
Error icon
to switch to other indoor unit information.
Status
Fri 10:00AM
Page 1/ 4
Fan
Air Flow Direction
VT
HZ
1
3
Individual
Economy
Anti Freeze
Off
Off
Unoccupied
Next
Error
Menu
Monitor
Page
Information
Touch the [Error Information].
2-digit numbers are corresponding to
the error code in the preceding table.
Error contents
En-14
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