Hitachi RPI-0.8FSG1 Service Manual page 307

(3) Remote Control 3 (Pulse Signal Input)
By using the signal from a building management system, the air conditioners can be stopped.
If a signal is input during stoppage of air conditioner, the air conditioner remains unchanged.
The basic wiring and time chart are shown below.
Turn OFF the power source before setting the dip switch.
Indoor Unit PCB
CN4
2
1
2
1
3P Connector
Signal to 1 & 2 of CN4
NOTES:
1. Picking up signal within 10 seconds after power supply is turned ON is not available due to initializing of
components.
Do not change the signal (RUN/STOP) in this period.
2. Remote Control Switch is required for this function.
Indoor Unit PCB Set No.6 at ON side.
DSW2
1 2 3 4 5 6 7 8
NOTE:
The pulse width shall be wider than 200ms.
X1
Wiring Diagram Example of Remote Control 3
OPTIONAL FUNCTION
ON
OFF
OFF
Power
Source
X1
Control Circuit
(4.1 Indoor Unit)
4-3