5 Optional functions
Indoor units input and output signals
SMGB0137 rev.0 - 05/2021
105
5
Cooling operation signal
On-screen display: 03.
This optional signal is used to pick up the cooling operation signal. An example of basic wiring is shown below.
The contact of the auxiliary relay “RYa” is closed when this operation signal is given.
Connect the wiring and use the materials as indicated in “5.1.1 Available ports”. (Example: terminal 1 and 3 of CN7).
3P Connector
CN7 Connector
Indoor unit PCB
Auxiliary relay
Cooling operation output is set to terminals 1 and 3 of CN7
Thermostat enabled signal during the cooling process
On-screen display: 04.
This optional signal is used to pick up the thermostat enabled signal for the compressor operating during the cooling
process (Thermo-ON).
Connect the wiring and use the materials as indicated in “5.1.1 Available ports”. (Example: terminal 1 and 3 of CN7).
An example of basic wiring is shown below. The contact of the auxiliary relay “RYa” is closed during Thermo-ON in
cooling operation.
3P Connector
CN7 Connector
Indoor unit PCB
Auxiliary relay
Cooling Thermo-ON output is set to terminals 1 and 3 of CN7
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