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Do not set the DIP switch or rotary switch of this unit except as specifi ed
in this manual or the operating manual supplied with the air conditioner.
Setting the switches other than specifi ed will cause an accident or trouble.
Before opening the case of this unit, completely discharge static elec-
tricity charged on you body. Not doing so will cause trouble.
Do not touch the circuit board and circuit board parts directly with your
hands. Otherwise, injury or electric shock could result.
Be careful so that the front case does not fall after the front case screws
are removed. Otherwise, injury could result.
Install the remote controller cables 1 m away from television and radio
to avoid distorted images and noise.
Confi rm the name of each terminal block of the unit and connect the
wiring in accordance with the directions given in the manual. Improper
wiring work will damage the electric parts and cause smoke and fi re.
Connect the connectors securely. Loose connectors will cause trouble,
heating, fi re, or electric shock.
Never bundle the remote controller cables , the power supply cable and
transmission cable together. Bundling these cables together will cause
miss operation.
When installing the connection cable near a source of electromagnetic
waves, use shielded cable. Otherwise, a breakdown or malfunction
could result.
5.1. Wiring types
5.1.1. Single control
When there is a
functional earthing
5.1.2. Group control
With a single remote controller, up to 16 units can be simultaneously oper-
ated.
Indoor unit 0 Indoor unit 1 Indoor unit 2 Indoor unit 3
When there is a
functional earthing
Remote controller
5.1.3. Multiple remote control
Number of connectable remote controllers. VRF: 4, RAC: 2
Multiple installation method described above is prohibited to combine 3
Wired type with 2 Wired Type.
When there is a
functional earthing
Group control and multiple remote control can be used together.
5.2. Preparing for Installation
5.2.1. Strip of the remote controller cable
Sheathed
B
A
cable
A: 7 mm (1/4 in), B: 7 mm (1/4 in), C: 25 mm (1 in)
CAUTION
Indoor unit
Remote controller
Y1 Y2
Indoor unit
Remote
Remote
controller
controller
Shielded
A
B
Functional
cable
earthing
C
5.2.2. Remove the front case
When opening the remote controller, remove the connector from the
front case. The cables may break if the connector is not removed and
the front case hangs down. When installing the front case, connect the
connector to the front case. When removing and connecting the connec-
tor, be careful not to break the cables.
Release the claws (2 places) with a fl at-blade screwdriver, and separate
the front case and rear case.
Lightly lift the
front case.
Flat-blade
screwdriver
Disconnect the connection cable connector from the connector of the front
case PC board (printed circuit board).
Rear
case
5.2.3. Setting the DIP switch
Use an insulated screwdriver to set the DIP switches. Do not touch the
DIP switch with your hands.
Before using this product, always set DIP switch to "ON". If not set, when
Y3
the main power is turned on again, the set data by menu operation will be
erased and cause erroneous operation.
[DIP Switch]
• Performs the enabling/disabling of the backup function by the internal
battery.
• It is disabled when shipped from the factory to prevent consumption of
the charge.
5.3. Installation
Perform wiring so that water does not enter this unit along the external
wiring. Always install a trap to the wiring or take other countermeasures.
Otherwise it will cause trouble or electric shock or fi re.
5.3.1. Install the rear case
A. When attaching to switch box:
Seal the wiring hole of the remote controller
cable with putty.
Trap (remote controller cable)
Box
Rear case
Front case
Rear case
Claws (2 places)
Front case
(back side)
Connector
CAUTION
Front case (back side)
Set the DIP switch to ON
OFF ON
CAUTION
Connector
Putty
Screws
Trap
En-3
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