En-13
8.3. Front panel installation
(1) First, fit the lower part of the front panel, and insert top and bottom hooks. (3 top
sides, 2 center)
Indoor unit
Front panel
Latches (2 position)
Center hooks
(2 position)
Top hooks
(3 position)
Top holes (3 position)
(2) Attach the 6 screws.
(3) Attach the wire cover.
(4) Attach the 3 caps.
(5) Attach 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 lamp
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 If not performed correctly
Check
box
Has the indoor unit been installed
correctly?
Vibration, noise, indoor unit may drop
Has there been a check for gas leaks
(refrigerant pipes)?
No cooling, No heating
Has heat insulation work been
completed?
Water leakage
Does water drain easily from the
indoor units?
Water leakage
Is the voltage of the power source the
same as that indicated on the label on
the indoor unit?
No operation, heat or burn damage
Are the wires and pipes all connected
completely?
No operation, heat or burn damage
Is the indoor unit earthed (grounded)? Short circuit
Is the connection cable the specified
thickness?
No operation, heat or burn damage
Are the inlets and outlets free of any
obstacles?
No cooling, No heating
Does start and stop air conditioner
operation by remote controller or
external device?
No operation
After installation is completed, has the
proper operation and handling been
explained to the user?
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
Wired Remote
Controller Error
code
Error contents
OPERATION
lamp (green)
TIMER lamp
(orange)
FILTER lamp
(red)
(1) (2)
Remote controller com-
munication error
(1) (4)
Network communica-
tion error
(1) (6)
Peripheral unit com-
munication error
(2) (6)
Indoor unit address
setting error
(2) (9)
Connection unit
number error in wired
remote controller
system
(3) (1)
Indoor unit power sup-
ply abnormal
(5) (1)
Indoor unit main PCB
error
(3) (10)
Indoor unit commu-
nication circuit (wired
remote controller) error
(4) (1)
Indoor unit room temp.
thermistor error
(4) (2)
Indoor unit heat ex.
temp. thermistor error
(4) (4)
Human sensor error
(5) (1)
Indoor unit fan motor
1 error
(5) (2)
Indoor unit coil (expan-
sion valve) error
(5) (3)
Indoor unit water drain
abnormal
(9) (15)
Outdoor unit miscel-
laneous error
(10) (8)
Poor refrigerant circula-
tion
(13) (1)
RB unit error
Display mode
: 0.5 s ON / 0.5 s OFF
: 0.1 s ON / 0.1 s OFF
( ) : Number of flashing
Wired Remote Controller Display
UTY-RNRUZ* (2-wire type)
Status
Air Flow Direction
VT
Off
13
Off
HZ
Economy
Individual
Anti Freeze
Page 1/ 4
Monitor
Next
Page
Error
Information
Set Temp.
Mode
MenuStatus
Fan
Fri 10:00AM
Unoccupied
Error icon
Touch the [Status]. Touch the [Error Information].
2-digit numbers are corresponding to
the error code in the preceding table.
Touch the [Next Page] (or [previous page])
to switch to other indoor unit information.
For more information, refer to the installation manual of the remote controller.
9373370499_IM.indb 139373370499_IM.indb 13 7/28/2020 10:26:22 AM7/28/2020 10:26:22 AM
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