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8.4. Mount the intake grille

(1) Cut the right side of the
intake grille. This is only
when the pipe exits from
the right side.
(2) Insert the hinges on the
bottom of the intake grille
into the holes in the base
assembly. Then mount the
arms to the 3 areas on the
top of the intake grille.

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

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 com-
pleted?
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 specifi ed
thickness?
Are the inlets and outlets free of any
obstacles?
Does start and stop air conditioner op-
eration by remote controller or external
device?
After installation is completed, has the
proper operation and handling been
explained to the user?
If not performed correctly
Check box
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
FILTER lamp
lamp (green)
(orange)
(red)
(1)
(2)
(1)
(4)
(1)
(6)
(2)
(6)
(2)
(9)
(3)
(1)
(3)
(2)
(3)
(10)
(4)
(1)
(4)
(2)
(5)
(1)
(5)
(2)
(5)
(3)
(9)
(15)
(10)
(8)
(13)
(1)
Display mode
: 0.5s ON / 0.5s OFF
: 0.1s ON / 0.1s OFF
( ) : Number of fl ashing
Wired Remote Controller Display
UTY-RNR*Z* (2-wire type)
Error icon
Touch the [Status].
Touch the [Error Information].
2-digit numbers are corresponding to
the error code in the preceding table.
For more information, refer to the installation manual of the remote controller.
UTY-RLR* (2-wire type)
Error icon
For more information, refer to the installation manual of the remote controller.
Wired remote
controller
Error contents
error code
Remote controller communi-
cation error
Network communication
error
Peripheral unit communica-
tion error
Indoor unit address setting
error
Connection unit number er-
ror in wired remote controller
system
Indoor unit power supply
abnormal
Indoor unit main PCB error
Indoor unit communication
circuit (wired remote control-
ler) error
Indoor unit room temp.
thermistor error
Indoor unit heat ex. temp.
thermistor error
Indoor unit fan motor 1 error
Indoor unit coil (expansion
valve) error
Indoor unit water drain
abnormal
Outdoor unit miscellaneous
error
Poor refrigerant circulation
RB unit error
Touch the [Next Page] (or [previous page])
to switch to other indoor unit information.
Error code
En-14