Hitachi P-N23NA2 Service Manual

6 Optional functions
Indoor units input and output signals
SMGB0099 rev.0 - 12/2016
208
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, for example, the outdoor air intake fan operation can be stopped.
Connect the wiring and use the materials as indicated in “6.1.1 Available ports”. (Example: terminal 1 and 2 of CN7)
? NOTE
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 “6.1.1 Available ports”. (Example: terminal 1 and 3 of CN7)
? NOTE
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. The X2 auxiliary relay contact closes when the cooling
operation signal is enabled, regardless of whether the thermostat signal is enabled or disabled.
Connect the wiring and use the materials as indicated in “6.1.1 Available ports”. (Example: terminal 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 “6.1.1 Available ports”. (Example: terminal 1 and 3 of CN7)
? NOTE
The X1 auxiliary relay contact closes when the thermostat signal is enabled during cooling mode.
Heating operation signal
On-screen display: 05.
This optional signal is used to pick up the heating operation signal. The X2 auxiliary relay contact closes when the
heating operation signal is enabled, regardless of whether the thermostat signal is enabled or disabled.
Connect the wiring and use the materials as indicated in “6.1.1 Available ports”. (Example: terminal 1 and 3 of CN7)
Thermostat enabled signal during the heating process
On-screen display: 06.
This optional signal is used to pick up the thermostat enabled signal for the compressor operating (thermo-ON) during
the heating process and to control, for example, a circulation pump or humidier.
Connect the wiring and use the materials as indicated in “6.1.1 Available ports”. (Example: terminals 1 and 2 of CN8)
? NOTE
The X2 auxiliary relay contact closes when the thermostat signal is enabled during heating mode.

Hitachi P-N23NA2 Specifications

General

Brand	Hitachi
Model	P-N23NA2
Category	Air Conditioner
Language	English