Description Of Optional Output Signals - Hitachi RCI Service Manual

6 Optional functions
N O T E
• The remote control thermistor cannot be used if a remote temperature sensor is used.
• The heating temperature calibration function is automatically cancelled in heating operation.
• If a remote temperature sensor is used, it must be positioned according to the following requirements:
– It must be in a position where the average room temperature can be detected and where the outdoor air
generated when doors are opened and closed does not affect the room temperature.
– It must be in a position where the thermistor is not directly exposed to sunlight or where there are no heat
sources nearby.

6.1.5 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 the outdoor air intake fan operation can be locked.
Connect the wiring and use the materials as indicated in
N O T E
The auxiliary relay contact X2 closes when an operation signal is transmitted.
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.
Connect the wiring and use the materials as indicated in
N O T E
The auxiliary relay contact X2 closes when an operation signal is transmitted.
Cooling operation signal
On-screen display: 03.
This optional signal is used to pick up the cooling operation signal.
Connect the wiring and use the materials as indicated in
N O T E
The X2 auxiliary relay contact closes when the cooling operation signal is enabled, regardless of whether the
thermostat signal is enabled or disabled.
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.
Connect the wiring and use the materials as indicated in
N O T E
The X1 auxiliary relay contact closes when the thermostat signal is enabled during cooling mode.
Heating operation signal
On-screen display: 05.
192
SMGB0063 rev. 1 - 10/2010
Available ports, see on page 194.
Available ports, see on page 194.
Available ports, see on page 194.
Available ports, see on page 194.