Mitsubishi Heavy Industries MHI FDU71VNXVF1 Technical Manual page 259

(ii) In case of "Pulse input" setting (Local setting)
It is effective only when the input signal to CnT-6 or CnTA is changed OFF→ON, and at that time unit operation [ON/
OFF] is inverted.
CnT-6 or CnTA input
(c) Remote operation
(i) In case of multiple units (Max. 16 indoor units group) are connected to one wired remote control
When the indoor function setting of wired remote control for "External control set" is changed from "Individual
(Factory default)" to " For all units", all units connected in one wired remote control system can be controlled by
external operation input.
Outdoor unit
①
123
Signal &
Power
123
XY
Indoor unit
①
XY
CnT-6 or
CnTA
When more than one indoor unit (Max. 16 indoor units) are connected in one wired remote control system:
With the factory default, external input to CnT-6 or CnTA is effective for only the unit ① .
(1)
(2) When setting "For all unit" (Local setting), all units in one remote control system can be controlled by external
input to CnT-6 or CnTA on the indoor unit ① .
External input to CnT-6 or CnTA on the other indoor unit than the unit ① is not effective.
(3)
(21) Operation permission/prohibition
(In case of adopting card key switches or commercially available timers)
When the indoor function setting of wired remote control for "Operation permission/prohibition" is changed from "Invalid
(Factory default)" to " Valid", following control becomes effective.
・ CnT
CnT
Blue
12V
Unit B
OFF
OFF
Unit A OFF
Unit B
OFF
Outdoor unit Outdoor unit
② ③
123 123
External
input
123 123
XY XY
Indoor unit Indoor unit
② ③
Wired remote control
Individual operation (Factory default)
ON
Only the unit
Only the unit
directly connected
directly connected
to the remote
to the remote control
control can be
can be operated.
stopped opeartion.
Unit ① only
Optional
1
2
XR1
3
XR2
4
XR3
XR5
5
XR4
6
XR5
OFF
Remote Remote
control OFF control ON
ON
OFF
ON
ON
ON
OFF
Remote Remote
control OFF control ON
Outdoor unit Outdoor unit
④
123
123
Refrigerant piping
123 123
XY XY
Indoor unit
Indoor unit
④
Ex. Indoor units = ①＋②＋③＋④＋......Ⓝ ≦16 units
All units operation (Local setting)
OFF ON
All units in one
remote control
system can be
operated.
Unit ① only Units ①－Ⓝ
・ CnTA
CnTA
Blue
12V
Card key
Note (1)  C nTA function can be
switch
258
- -
ON
'12 • PAC-T-178
ON
OFF
OFF
Ⓝ
Ⓝ
OFF
All units in one
remote control
system can be
stopped operation.
Units ①－Ⓝ
XR6
changed by RC-EX1A.