External Control (Remote Display) /Control Of Input Signal - Mitsubishi Heavy Industries SCM60ZF-S Technical Manual

4.10 Determining the operating mode
The cooling and heating operating modes are the remote control switch mode that have been previously determined.
If a mode differing from these is selected after this, the selected mode will appear in the display of the remote control, but only the fan
will operate.
First operation
Example
Selected Mode Remote Control Display
1 Cooling Cooling
2 Heating Heating
Example of operating pattern
Cooling
switch
A unit
ON
Heating
B unit
switch
Operation Operation
4.11 External control (remote display) /control of input signal (STM, SRRM only)
Make sure to connect the wired remote control unit. Control of input signal is not available without the wired remote control unit.
(1) External control (remote display) output
Following output connectors (CNT) are provided on the printed circuit board of indoor unit.
(a) Operation output: Power to engage DC 12V relay (provided by the customer) is outputted during operation.
(b) Heating output: Power to engage DC 12V relay (provided by the customer) is outputted during the heating operation.
(c) Compressor ON output: Power to engage DC 12V relay (provided by the customer) is outputted while the
(d) Error output: When any error occurs, the power to engage DC 12V relay (provided by the customer) is outputted.
(2) Control of input signal
Control of input signal (switch input, timer input) connectors (CNT) are provided on the control circuit board of the indoor unit.
However, when the operation of air conditioner is under the Center Mode, the remote control by CnT is invalid.
(a) If the factory settings (Jumper wire J1 EXTERNAL INPUT on the PCB) are set, or "LEVEL INPUT" is selected 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
A Unit
B Unit
(b) When Jumper wire J1 on the PCB of indoor unit is cut at the field or "PULSE INPUT" is selected in the wired remote
control's indoor unit settings.
Input signal to CnT becomes valid at OFF → ON only and the motion of air conditioner [ON/OFF] is inverted.
CnT Input
A Unit
B Unit
Operation Selected Mode
Cooling Heating
Heating Cooling
Cooling
Fan
ON
compres sor is operating.
ON
OFF
ON
OFF
ON
*ON
ON
OFF
OFF
ON
OFF
ON
OFF
Second operation
Remote Control Display Operation
(1)
Heating Fan
Cooling Fan
Heating
Fan
switch
ON
Cooling
Cooling
switch
ON
Operation Operation
Air conditioner ON
Air conditioner OFF
ON
OFF
ON
OFF
OFF
ON
OFF
ON
OFF
OFF
ON
56
- -
Note (1) If the display shows heat-
Notes
• Different mode is
only fan operation.
Heating
Heating
Heating
switch
ON
Operation
Note (1) [ ] indicates currect operation.
OFF
Note (1) The ON with the * mark indicates
an ON operation using the remote
*ON
control unit switch, etc.
OFF
ing and the operation is
fan, Hot Keep will oper-
ate.