Mitsubishi Electric FDT125VNVF Technical Manual page 309

(a) Output for external control (remote display)
Following output connectors (CnT) are provided on the indoor control PCB for monitoring operation status.
① Operation output: Outputs DC12V signal for driving relay during operation
② Heating output: Outputs DC12V signal for driving relay during heating operation
③ Thermostat ON output: Outputs DC12V signal for driving relay when compressor is operating.
④ Error output: Outputs DC12V signal for driving relay when anomalous condition occurs.
(b) Remote operation input
Remote operation input connector (CnT-6 or CnTA) is provided on the indoor control PCB.
However remote operation by CnT-6 or CnTA is not effective, when "Center mode" is selected by center controller.
In case of plural unit (twin, triple, double twin), remote operation input to CnT-6 or CnTA on the slave indoor unit is
invalid.
Only the "LEVEL INPUT" is acceptable for external input, however when the indoor function setting of "Level
input (Factory default)" or "Pulse input" is selected by the function for "External input" of the wired remote controller,
operation status will be changed as follows.
1) In case of "Level input" setting (Factory default)
Input signal to CnT-6 or CnTA is OFF→ON ...... unit ON
Input signal to CnT-6 or CnTA is ON→OFF ...... unit OFF
Operation is not inverted.
CnT-6 or CnTA input
CnT-6 or CnTA input
Unit A
Unit A
Unit B
Unit B
Note: The latest operation has priority
It is available to operate/stop by remote controller or center controller
2) 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
CnT-6 or CnTA input
Unit A
Unit A
Unit B
Unit B
In case of CnT ① Operation stop level > CnTA ③ Operation permission/prohibition level
3)
CnT
Level input
CnTA
Operation permission/
prohibition setting
Actual operation
Operation permission/
prohibition zone
( ※ ) CnT level input supersedes CnTA operation prohibition.
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
ON
OFF
OFF
Remote
Remote
controller OFF
controller OFF
ON
ON
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
Remote
Remote
controller OFF
controller OFF
Operation
Stop
Operation permission
Operation
Stop
Operation permission
308
-
ON
OFF
OFF
ON
OFF
OFF
ON
ON
OFF
OFF
Remote
Remote
controller ON
controller ON
ON
OFF
OFF
ON
ON
OFF
ON
ON
OFF
OFF
OFF
Remote
Remote
controller ON
controller ON
Operation
Stop
Operation prohibition
Operation( )
Stop
Prohibition Prohibition
-
'12 • PAC-T-174
ON
ON
ON
OFF
OFF
Operation
Stop
Operation
Stop
Operation permission