Hitachi RASC-10HNPE, Руководство по обслуживанию, Страница: 109 / 306

Current control demand (
6
/
7
/
8
/
9
)
These signals allow to regulate the input current around the selected percentage (60%, 70%, 80% or 100%) of the
maximum compressor current. This function provides energy-saving by limiting the installation power consumption.
If the running current of the RASC unit exceeds the maximum limit, the unit changes to the thermo-OFF condition.
Stoppage cause code “d1=10” is displayed on the remote control. When the input terminal is opened during the demand
current control, the control of the input terminal is reset.
Connect the cabling and use the materials as shown in section
"Available ports".

Description of optional output signals
Operation signal (

)
This signal allows to notify that the unit is operating. It enables to start up additional systems such as humidifiers, fans
and other additional air-conditioning systems.
Connect the cabling and use the materials as shown in section
"Available ports"
.
Note that the contact of auxiliary relay X3 is closed when an operation signal is issued.
Alarm signal (

)
This signal allows to notify that protection devices have been activated and to transfer it to additional systems.
Connect the cabling and use the materials as shown in section
"Available ports"
.
Note that the contact of auxiliary relay X3 is closed when an operation signal is issued.
Compressor ON signal (
3
)
This optional signal is used to pick up the signal when the compressor is ON. It can be used to check how the
compressor is running at all times. It is very useful for locking the compressor when the fans are locked.
This signal allows to notify that the compressor is activated. This function can be applied for situations such as checking
signals during remote-control operation and for locking the compressor when the fans are locked.
Connect the cabling and use the materials as shown in section
"Available ports".
Note that the contact of auxiliary relay X3 is closed when an operation signal is issued.
Defrost operation signal (
4
)
This signal allows to notify that the unit is under defrosting operation.
Connect the cabling and use the materials as shown in section
"Available ports".
Note that the contact of auxiliary relay X3 is closed when an operation signal is issued.
6 Optional functions
Optional external input and output signals
SMGB0091 rev.2 - 11/2015 99
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