External Control (Remote Display)/Control Of Input Signal - Mitsubishi SCM40ZS-S Technical Manual

(b) In the case of CnT input ON (Operation permission)
(i) The air-conditioner can be operated or stopped by the wired remote control signal.
(When the "CENTER" mode is set, the operation can be controlled only by the center input.)
(ii) When the CnT input is changed from OFF to ON, the air-conditioner operation mode is changed depending on the
status of the jumper wire (J1) on the indoor control board.
When the jumper wire (J1) is short circuited
The signal (a) above starts the air-conditioner.
(Shipping status)
(c) In the case of CnT input OFF (Operation prohibition)
(i) Air-conditioner is unable to control the operation/stop, ect. in accordance with signals from the wired remote control signal
wire.
(ii) Air-conditioner stops as it changes CnT input ON → OFF.
(18) External control (remote display) /control of input signal
(a) External control (remote display) output
Following output connectors (CnT) are provided on the printed circuit board of indoor unit.
Note (1) Please install the separately-sold interface kit (SC-BIKN-E). The output connector (CnT) is located on the circuit board of the interface kit.
• Operation output: Power to engage DC12V relay (provided by the customer) is outputted during operation.
• Heating output: Power to engage DC12V relay (provided by the customer) is outputted during the heating operation.
• Compressor OPERATION output: Power to engage DC12V relay (provided by the customer) is outputted while the
• MALFUNCTION output: When any error occurs, the power to engage DC12V relay (provided by the customer) is outputted.
(b) Control of input signal
Control of input signal (switch input, timer input) connectors (CnT) are provided on the printed circuit board of indoor unit.
However, when the operation of air-conditioner is under the " CENTER " mode, the wired remote control by CnT is invalid.
(i) Level input
If the factory settings (Jumper wire J1 external input on the PCB of indoor unit) are set, or "LEVEL INPUT" is se-
lected in the wired remote control's indoor unit settings.
1) Input signal to CnT OFF → ON
2) Input signal to CnT ON → OFF
CnT input
Unit
(Case A)
Unit
(Case B)
When the CnT input is set to ON, the air-condition-
er starts operation. After that, the operation of the
air-conditioner depends on (a) above. (Local status)
compressor is operating.
Air-conditioner ON
Air-conditioner OFF
ON
OFF
ON
OFF
*ON
ON
147
-
When the jumper wire (J1) is released
ON
OFF
OFF
*ON
ON
OFF
OFF
ON
OFF
OFF
-
'16 • SCM-T-199
Note (1) The ON with the * mark indi-
cates an ON operation using the
wired remote control, etc.