En-15
7.5. Special installation methods
CAUTION
• When setting DIP switches, do not touch any other parts on the circuit board directly
with your bare hands.
• Be sure to turn off the main power.
7.5.1. Group control system
CAUTION
• Group control cannot be used when using it by the multi type.
A number of indoor units can be operated at the same time using a single remote control-
ler.
(1) Wiring method (indoor unit to remote controller)
Indoor
unit
1
Bus wire
Remote
controller cable
Remote controller
When ground wire is necessary
Indoor
unit
2
Indoor
unit
3
Indoor
unit
4
(2) DIP switch setting (Indoor unit)
Set the unit number of each indoor unit using the DIP switches on the indoor unit
circuit board. (See the following table and figure.)
The DIP switches are normally set to make the unit number 00.
Indoor unit Unit number
DIP SWITCH No.
1
2
3
4
1
00
OFF
OFF
OFF
OFF
2
01
ON
OFF
OFF
OFF
3
02
OFF
ON
OFF
OFF
4
03
ON
ON
OFF
OFF
5
04
OFF
OFF
ON
OFF
6
05
ON
OFF
ON
OFF
7
06
OFF
ON
ON
OFF
8
07
ON
ON
ON
OFF
9
08
OFF
OFF
OFF
ON
0
09
ON
OFF
OFF
ON
A
10
OFF
ON
OFF
ON
B
11
ON
ON
OFF
ON
C
12
OFF
OFF
ON
ON
D
13
ON
OFF
ON
ON
E
14
OFF
ON
ON
ON
F
15
ON
ON
ON
ON
7.5.2. Dual remote controllers
• 2 separate remote controllers can be used to operate the indoor units.
•
The timer and self-diagnosis functions cannot be used on the slave units.
(1) Wiring method (indoor unit to remote controller)
Remote controller cable
Indoor unit
Remote controller
Slave unit
Master unit
(2) Remote controller DIP switch 1 setting
Set the remote controller DIP switch 1 No. 2 according to the following table.
Number of remote
controllers
Master unit
Slave unit
DIP SW 1 No. 2
DIP SW 1 No. 2
1 (Normal)
OFF
–
2 (Dual)
OFF
ON
8. TEST RUN
CAUTION
• Always turn on the power 12 hours prior to the start of the operation in order to ensure
compressor protection.
CHECK ITEMS
(1) Is operation of each button on the remote controller normal?
(2) Does each lamp light normally?
(3) Do not air flow direction louvers operate normally?
(4) Is the drain normal?
(5) Is there any abnormal noise and vibration during operation?
• Do not operate the air conditioner in test run for a long time.
[OPERATION METHOD]
• For the operation method, refer to the operating manual.
(1) Stop the air conditioner operation.
(2) Press the master control button and the fan control button simultaneously for 2 seconds
or more to start the test run.
Test run display
(3) Press the start/stop button to stop the test run.
If “C0” appears in the unit number display, there is a remote controller error. Refer to the
installation manual included with the remote controller.
Unit number
Error code
Content
Incompatible indoor unit is connected
Indoor unit
↔
remote controller communication
error
[Using the wireless remote controller for test run] (Option)
• For the operation method, refer to the operating manual.
•
The outdoor unit may not operate depending on the room temperature. In this case,
press the test run button on the wireless remote controller while the air conditioner is
running. (Point the transmitter section of the wireless remote controller toward the air
conditioner and press the test run button with the tip of a ball-point pen, etc.)
Transmitter section
Test run button
• To end test operation, press the wireless remote controller START/STOP button.
(When the air conditioner is run by pressing the test run button, the OPERATION indicator
lamp and TIMER indicator lamp will simultaneously flash slowly.)
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