Hitachi RCI Service Manual page 202

6 Optional functions
• Difference of over 1.5 degrees.
• Do not use a mercury thermostat.
• The remote control must remain connected to the unit. When the power supply is reconnected, start the unit by pressing
the on button. The compressor will then run under the control of the field-supplied thermostat. All other functions are
controlled in the normal manner via the remote control.
Function 1: remote on/off of the unit
On-screen display: 03.
This is an optional on/off signal that uses the signal levels ON and OFF. Connect the wiring and use the materials as
indicated in Available ports, see on page 194.
N O T E
When the unit is started using the remote ON/OFF switch, the fan speed depends on the mode stored in the remote
control.
N O T E
• The collection of signals during the first 10 seconds after
connecting the power supply is not available due to
component initialisation.
• Operation priority is given to the remote on/off signal or to
the remote control, whichever is transmitted last.
Function 2: remote switching on of the unit (pulse signal input)
On-screen display: 04.
This is an optional remote on/off signal that uses the pulse signal.
Connect the wiring and use the materials as indicated in
Function 2: remote switching off of the unit (pulse signal input)
On-screen display: 05.
This is an optional remote off signal that uses the pulse signal.
Connect the wiring and use the materials as indicated in
A time chart with the uses of functions 04/05 is shown below.
N O T E
The collection of signals during the first 10 seconds after
connecting the power supply is not available due to
component initialisation.
Cancellation of commands from the remote control after a forced stoppage
On-screen display: 06.
It is possible to stop the air conditioning systems using the signal from a building management system. In this case, the
individual commands transmitted from the remote control are cancelled.
Connect the wiring and use the materials as indicated in
190
SMGB0063 rev. 1 - 10/2010
Available ports, see on page 194.
Available ports, see on page 194.
Available ports, see on page 194.