Hitachi FSG Series Service Manual page 202

4
OPTIONAL FUNCTION
2
NOTES:
This function is available when "4.1.3 Power Supply
ON/OFF 2 (after Power Failure)" is applied.
Picking up signal within 10 seconds after power supply
is turned ON is not available due to initializing of
components.
n 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.
Ö
CAUTION:
Turn OFF the power source before setting the dip
switch.
Indoor Unit PCB
ΠWiring Diagram Example of Remote Control 3:
Indoor Unit PCB
3P Connector
NOTE:
The pulse width shall be wider than 200ms.
SS3: Remote Control ON/OFF SS3: Remote Control ON/OFF
OFF
Control Circuit Control Circuit
ΠTime Chart:
Signal to 1 & 2 of
CN4
Control by R.C.S
Unit Operation
Set No.6 at ON Side
Power Power
Source Source
Time
NOTES:
This function is available when "4.1.3 Power Supply
ON/OFF 2 (after Power Failure)" is applied.
Picking up signal within 10 seconds after power supply
is turned ON is not available due to initializing of
components.
n Cancellation of Commands from Remote Control
Switch after Forced Stoppage (Level Signal Input)
By using the signal from a building management system,
the air conditioners can be stopped and the commands
from the remote control switch are canceled. The basic
wiring and time chart are shown below. The required parts
are shown in Table 4. 1
ΠWiring Diagram Example:
Cut JP5 of Indoor PCB
Indoor Unit PCB
3P Connector
SS3: Forced stoppage SW
Control Circuit
ΠTime Chart:
Signal to 1 & 2 of
CN4
Control by R.C.S
Unit Operation
NOTE:
Picking up signal within 10 seconds after power supply
is turned ON is not available due to initializing of
components.
Power
Source
Time