Description Of Optional Output Signals - Hitachi RCI-1.0FSR Service Manual

5 Optional functions
Indoor units input and output signals

5.1.5 Description of optional output signals

Picking up of the operation signal
On-screen display: 01.
This optional signal is used to pick up the operation signal. Thanks to this function, the operation signal can be checked
from a remote location and, for example, the outdoor air intake fan operation can be stopped.
Connect the wiring and use the materials as indicated in
An example of basic wiring is shown below. The contact of the auxiliary relay "RYa" is closed when this operation signal
is given. This function enables the signal check during the remote control operation and an interlock of the fan for air
inlet, etc. The contact of the auxiliary relay "RYa" is opened while the protection devices are activated.
3P Connector
Alarm signal
On-screen display: 02.
This optional signal is used to pick up the activation of safety devices. The signal is normally displayed on the remote
control. This function is not available under abnormal transmission conditions.
An example of basic wiring is shown below. The contact of the auxiliary relay "RYa" is closed while the protection
devices are activated.
104 SMGB0137 rev.0 - 05/2021
"5.1.1 Available
CN7 Connector
CN7
2 1
Operation output is set to terminals 1 and 2 of CN7
CN7 Connector
CN7
3 1
3P Connector
Alarm output is set to terminals 1 and 3 of CN7
ports". (Example: terminal 1 and 2 of CN7).
Indoor unit PCB
Auxiliary relay
RYa
RY
Indoor unit PCB
Auxiliary relay
RYa
RY