Hitachi RCIM-1.0FSRE - Page 109

5 Optional functions
Indoor units input and output signals
SMGB0137 rev.0 - 05/2021
99
5
Specications for eld-supplied room thermostat:
• Manufacturer or type: equivalent to YAMAKATE R7031P005, R7031Q005.
• Contactor charge: 12 Vdc
• Di󰀨erence 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 eld-supplied thermostat. All other
functions are controlled in the normal manner via the remote control.
Remote ON/OFF 1 (Level signal input)
On-screen display: 03.
This is an optional on/o󰀨 signal that uses the signal levels ON and OFF. Connect the wiring and use the materials as
indicated in “5.1.1 Available ports”. (Example: terminals 1 and 3 of CN3)
SS3
X1
CN3
X1
3
2
1
2
1
3P Connector
Indoor unit PCB
SS3: Remote ON/OFF
Control circuit
Power
supply
Remote ON/OFF is set to terminals 1 and 2 of CN3
Press the RUN/
STOP switch
Control using the
RCS
CN3 signal
(Terminal 1
and 2)
Time
Unit operation
ON
ON
OFF
OFF
? NOTE
• When the unit is started using the remote ON/OFF switch, the fan speed depends on the mode stored in the remote control.
• The collection of signals during the rst 10 seconds after connecting the power supply is not available due to component initialization.
Do not change the signal in this period.
• Operation priority is given to the remote on/o signal or to the remote control, whichever is transmitted last.
• If multiple indoor units are connected to the same transmission wiring for remote control switch, input the signal to any of these indoor
units. When the transmission wiring is not used in a multiple indoor unit system for simultaneous operation, input the signal to the
main indoor unit.
Remote ON/OFF 2 (pulse signal input)
Function 2: remote switching ON of the unit (pulse signal input)
On-screen display: 04.
This is an optional remote on/o󰀨 signal that uses the pulse signal.
Connect the wiring and use the materials as indicated in “5.1.1 Available ports”. (Example: terminal 2 and 3 of CN3).