Selection Of Cooling/Heating External Input Function - Mitsubishi Heavy Industries FDT Series Technical Manual

CnT-6 or
CnTA
*1 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.
In case of "Level input" setting
Unit operation from the wired
remote controller becomes
*(1) In case that "Operation permission/prohibition mode" setting is "Valid" and "External input" setting is "Level
input (Factory default)";
When card key switch is ON (CnT-6 or CnTA ON: Operation permission), start/stop operation of the unit
from the wired remote controller becomes available.
When card key switch is OFF (CnT-6 or CnTA OFF: Operation prohibition), the unit stops operation in
conjunction with OFF signal, and start/stop operation of the unit from the wired remote controller becomes
not available.
*(2) In case that "Operation permission/prohibition mode" setting is "Valid" and "External input" setting is "Pulse
input (Local setting)";
When card key switch is ON (Operation permission), the unit starts operation in conjunction with ON signal.
and also start/stop operation of the unit from the wired remote controller becomes available.
When card key switch is OFF (Operation prohibition), the unit stops operation in conjunction with OFF signal, and
start/stop operation of the unit from the wired remote controller becomes not available.
(3) This function is invalid only at "Center mode" setting done by central controller.

(22) Selection of cooling/heating external input function

(i) When "External input 1 setting: Cooling/heating" is set for the indoor unit function from remote controller, the cooling or
heating is selected with CnT-6 or CnTA.
(ii) When the External input 1 method selection: Level input is set for the indoor unit function:
(iii) When the External input 1 method selection: Pulse input is set for the indoor unit function:
Cooling).
(iv) If the cooling/heating selection signal is given by the external input, the operation mode is transmitted to the remote
controller.
Selection of cooling/heating external input function
External input selection
External input selection
Cooling/heating selection
Notes (1) Regarding the priority order for combinations of CnT and CnTA, refer to Page 304.
Normal operation
(Factory default)
ON
Operation
In case of "Pulse input" setting
available*(1)
External input method
Level
Pulse
Operation permission/prohibition mode
OFF
Operation
Stop
permission*1
Unit starts operation
*(2)
External terminal input
(CnT or CnTA)
Cooling/heating
Cooling/heating
(Competitive)
External terminal input
(CnT or CnTA)
Cooling/heating
Cooling/heating
(Competitive)
- 307 -
'12 • PAC-T-173
"Valid" (Local setting)
ON OFF
Operation prohibition
(Unit stops)
Operation
ON
OFF
OFF
Cooling zone Heating zone Cooling zone
Heating
Cooling Cooling
Heating
Cooling Cooling
Auto, cooling, dry mode command
from remote controller from remote controller
ON
OFF OFF
Heating zone
After setting "Cooling/heating selection", the cooling/heating is
selected by the current operation mode.
During heating:: Set at the heating zone (cooling prohibition zone).
During cooling, dry, auto and fan mode: Set
at cooling zone (heating prohibition zone).
Heating
Auto
Cooling
Heating
Auto
Cooling
Set "Cooling/ Auto, cooling, dry mode command
Heating" "Pulse" by remote controller
ON
Heating zone
Heating
Heating
Heating, auto, heating mode command
ON
Cooling zone
Cooling
Cooling
Auto, heating mode
command by remote controller