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9. CASSETTE GRILLE INSTALLATION
• Operate according to the installation manual of the Cassette grille.
• Be sure to confirm there is no gap between the Cassette grille and main unit after install
-
ing the Cassette grille.
10. TEST RUN
10.1. Test run using the 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.
10.2. Test run using the remote controller
• Refer to the installation manual for the remote controller to perform the test run using the
wireless remote controller.
• When the air conditioner is being test run, the OPERATION and TIMER indicators flash
slowly at the same time.
11. 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 (refrig
-
erant 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 thick
-
ness?
No operation, heat or burn
damage
Are the inlets and outlets free of any ob
-
stacles?
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?
12. 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. Refer to the following table for lamp blink
-
ing patterns and error codes.
Error indications
Wired remote
controller
error code
Error contents
OPERATION
lamp (green)
TIMER lamp
(orange)
FILTER lamp
(red)
(1)
(2)
Remote controller communi
-
cation error
(1)
(4)
Network communication error
(1)
(6)
Peripheral unit communica
-
tion error
(2)
(6)
Indoor unit address setting
error
(2)
(9)
Connection unit number error
in wired remote controller
system
(3)
(1)
Indoor unit power supply
abnormal
(3)
(2)
Indoor unit main PCB error
(3)
(10)
Indoor unit communication
circuit (wired remote control
-
ler) error
(4)
(1)
Indoor unit room temp. therm
-
istor error
(4)
(2)
Indoor unit heat ex. temp.
thermistor error
(5)
(1)
Indoor unit fan motor 1 error
(5)
(2)
Indoor unit coil (expansion
valve) error
(5)
(3)
Indoor unit water drain
abnormal
(9)
(15)
Outdoor unit miscellaneous
error
(10)
(8)
Poor refrigerant circulation
(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-RLR* (2-wire type)
Error icon
Error icon
Error code
Touch the [Status].
Touch the [Error Information].
For more information, refer to the installation manual of the remote controller.
For more information, refer to the installation manual of the remote controller.
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.
UTY-RNR*Z* (2-wire type)
For details on marking the error codes, please refer to the manual of “IR receiver unit” or
“Wired remote controller”.
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