Mitsubishi Heavy Industries FDT28KXE6A Service Manual page 27

5) CnS1 performs the following operation according to switching the jumper wire (J13) shorted or open. In case of
pulse input, the pulse width is 500ms or larger.
① J13 − Shorted
CnS1 input OFF (Open)
Remote controller operation
Remote controller display
Air-conditioner operation/stop
② J13 - Open
CnS1 input
Remote controller operation
Remote controller display
Air-conditioner operation/stop
(b) Demand control
(Note) Following explanation is based on using CnS2 terminal and setting function [P12]-[1] with 7-segment display.
However other terminals can be used with following function setting of 7-segment display
CnS1: [P11]-[1]
1) Demand control or normal control is switched with the connector (CnS2) and the jumper wire (J13) on the outdoor
control PCB after setting function [P12]-[1] (Factory setting) with 7-segment display.
J13: Switching of CnS2 input method
J13 shorted: Level input by CnS2
J13 open : Pulse input by CnS2
2) Demand control/Normal operation by the external input CnS2 to outdoor unit.
Input: CnS2
Open
Shorted
Note (1) Factory setting J13: Shorted, CnS2: Shorted (Short pin is connected)
3) The operation condition is displayed on the LCD of remote controller and it is transferred to optional centralized
controller
PUSH PUSH
Center
OFF
ON
PUSH PUSH
Center
Remote
OFF ON
CnG1: [P13]-[1]
Switching CnS2
input method:J13
Shorted
Shorted (Level input)
Open (Pulse input)
Shorted (Level input)
Open
Open
-
ON (Shorted)
PUSH
Remote
ON OFF
OFF ON
Air-conditioner ON OK
PUSH PUSH PUSH
Center
Remote
OFF ON
CnG2: [P14]-[1]
Demand control
Normal operation
Switching Demand control/
Normal operation (Reversal)
Normal control
Demand operation
(Pulse input)
25
-
Air-conditioner ON OK
OFF (Open)
PUSH
Center
ON OFF
OFF
Center
OFF
CnS2: Switching operation
permission/prohibition mode
—
(NOP)