Power Supply On/Off 1 (Automatic Operation When Power Supply On); Power Supply On/Off 2 (Restarting Function After Power Failure); Control By Field-Supplied Room Thermostat - Hitachi FSG Series Service Manual

Table 4. 1 Specifications on Required Components for
(1)~(4) Functions:
Manufacturer or
Component
Specifications
OMRON Mini Power Relay
Auxiliary Relay (X1, X2)
Model: MY1F or Equivalent
Changeover Switch (SS2, SS3)
Optional Part PCC-1
3P Connector Cord (Able to Connect JST
Low Voltage
Cord (Inside
of Unit)
220V/240V Class
Low Voltage
Cord (Outside
of Unit
220V/240V Class
NOTE:
Make the wires CN4 as short as possible. Do not install
the wires along the 200-400V power line. Separately
install them at a distance of more than 30cm.
(Intersecting as applicable.) If the wires are installed
along the power line, put the wires in a metal tube and
connect a wire to an end for grounding. The maximum
wiring length is 70m. In the case that this function is
used, it is recommended that safety devices such as
electric leakage breaker or smoke detector, etc. be
used.
4.1.2.
POWER SUPPLY ON/OFF 1 (AUTOMATIC
OPERATION WHEN POWER SUPPLY ON)
Set the dip switch on the PCB for the indoor unit as shown
in the figure below to start and stop the system
automatically according to the power supply ON/OFF.
When this function is utilized in the condition that there is
no person to operate the unit, make the system with
monitoring for disaster prevention.
Ö
CAUTION:
Turn OFF the power source before setting the dip
switch.
Indoor Unit PCB
NOTE:
The unit is started and stopped according to the power
supply ON/OFF due to the power failure. When the
power failure is occurred during stoppage by the remote
control switch operation, the unit is started again
automatically after the power supply is recovered.
Remarks
Voltage
220V or 240V
Manual Type
Five Cords with
Connectors as one
Connector XHP -3) set
0.3mm² less than 24V
0.5~0.75mm²
0.3~0.75mm² less than 24V
2mm²
Set No.5 at ON Side
OPTIONAL FUNCTION
4.1.3.
POWER SUPPLY ON/OFF 2 (RESTARTING
FUNCTION AFTER POWER FAILURE)
Set the dip switch on the PCB for the indoor unit as shown
in the figure below to restart the system automatically even
if power failure continues for more than 2 seconds. The
standard setting provides automatic restarting in less than
2 seconds affer a power failure. The compressor starts in 2
seconds after a 3 minute time guard after power failure.
Ö
CAUTION:
Turn OFF the power source before setting the dip
switch.
Indoor Unit PCB
NOTE:
The system does not start if the system is stopped
before power failure.
4.1.4.
CONTROL BY FIELD-SUPPLIED ROOM
THERMOSTAT
In the case that a field-supplied room thermostat instead of
the inlet thermistor of the indoor unit is used, connect wires
as shown below. The required parts are shown in Table 4.
2
ΠField-Supplied Room Thermostat:
Ö
CAUTION:
Turn OFF the power source before setting the dip
switch.
3P Connector
Indoor Unit
Set No.3 at ON Side
4
3
Set No.7 at ON Side
Thermostat
Temperature
Increase