Mitsubishi Heavy Industries FDT71VNXVD Service Manual page 93

Connect the remote controller cord to the
terminal block.
Connect the terminal of remote controller (X,Y)
with the terminal of indoor unit (X,Y).
(X and Y are no polarity)
Wiring route is as shown in the right diagram
depending on the pulling out direction.
The wiring inside the remote controller case should be within 0.3mm
The sheath should be peeled off inside the remote controller case.
The peeling-off length of each wire is as below.
Pulling out from upper left Pulling out from upper center
X wiring : 215mm
Y wiring : 195mm
Install the upper case as before so as not to catch up the remote controller cord, and tighten with
the screws.
In case of exposing cord, fix the cord on the wall with cord clamp so as not to slack.
Installation and wiring of remote controller
Wiring of remote controller should use 0.3mm
Maximum prolongation of remote controller wiring is 600 m.
If the prolongation is over 100m, change to the size below.
But, wiring in the remote controller case should be under 0.5mm
of the case according to wire connecting. Waterproof treatment is necessary at the wire
connecting section. Be careful about contact failure.
100 - 200m ......................... 0.5mm
Under 300m ....................... 0.75mm
Under 400m ....................... 1.25mm
Under 500m ....................... 2.0mm
600
Master/ slave setting when more than one remote controllers are used
A maximum of two remote controllers can be connected to one indoor unit (or one group of indoor units.)
Indoor units
Remote controller cord (no polarity)
Remote controller Remote controller
SW1 "Master" SW1 "Slave"
Set SW1 to "Slave" for the slave remote controller. It was factory set to "Master" for shipment.
Note: The setting "Remote controller thermistor enabled" is only selectable with the master remote
controller in the position where you want to check room temperature.
The air conditioner operation follows the last operation of the remote controller regardless of the
master/ slave setting of it.
The indication when power source is supplied
When power source is turned on, the following is displayed on the remote controller until the
communication between the remote controller and indoor unit settled.
Master remote controller : "
Slave remote controller : "
At the same time, a mark or a number will be displayed for two seconds first.
This is the software's administration number of the remote controller, not an error cord.
When remote controller cannot communicate with the indoor unit for half an hour, the below indication will
appear.
Check wiring of the indoor unit and the outdoor unit etc.
Upper
Upper case
Board
Lower
Wiring
In case of pulling out from
upper left
X wiring : 170mm
Y wiring : 190mm
2
2 core wires or cables. (on-site configuration)
2
. Change the wire size outside
2
2 cores
2
2 cores
2
2 cores
2
2 cores
Switch Setting Contents
M Master remote controller
SW1
S Slave remote controller
Master
Slave
"
"
The left mark is only an
example. Other marks may
appear.
93
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'10 • PAC-SM-137A
Sheath
Sheath
Upper
Upper case
Board
Lower
Wiring
In case of pulling out from
upper center
2 2
(recommended) to 0.5mm .
The peeling-off length
of sheath
Upper
Board
Lower