Hitachi RWM-(H)FSN3E, Service Manual

Page: 221 / 424

7 Optional functions
SMGB0070 rev. 1 - 08/2011
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7
7.2.2 Configuration
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Available optional signals
HVRN2 and HRNME-AF units have the following signals that are described in the following table. These signals are set up
through the PCB of the outdoor unit.
• Output signals
Ind. Output signal Application Port
0
Nº setting application Nº setting -
01
Operation signal
This signal allows to pick up the machine’s operation signal. This is very useful to start up
additional systems such as humidifiers, fans and other additional air-conditioning systems.
CN7
02
Alarm signal
This signal picks up the machine’s alarm. This is very useful to warn that an alarm has
been tripped.
CN7
03
Compressor ON signal
This single allows to pick up the compressor’s operation signal. It is very useful for
checking signals during remote-control operation and for the interlock of the outdoor unit.
CN7
04
Defrost operation signal
This signal allows to pick up the defrosting of the unit. This is very useful to know how the
indoor unit is operating if there is an abnormal situation. .
CN7
N O T E
Do not set same function (01~04) to multiple input port.