Outdoor Unit - Hitachi FSG Series Service Manual

4
OPTIONAL FUNCTION
6
n Picking Up Cooling Operation Signal (RPK-FSGM is
not available)
This function is utilized to pick up the cooling operation
signal. The contact of RYa is closed when cooling
operation signal is ON despite "Thermo-ON" or "Thermo-
OFF". Connect the wires as shown below. The required
main parts are indicated in Table 4. 3
* Connector
3 Pin Connector Housing (JST-XHP-3)
* Connector No.
CN5 RCD - FSG(E), RPF(I) - FSG(E)
CN20 RCI-FSGE, RPI-FSG(E), RPC-FSGE

4.2. OUTDOOR UNIT

On the outdoor unit printed circuit board, there are three
input terminals to receive external signals and two output
terminals to send signals outwards. These signals are
available by setting as shown below.
Function No. Input
1 Fixing Heating Mode
2 Fixing Cooling Mode
3 Demand
4 Snow Sensor
5 Enforced Stoppage
Each input terminal and output terminal are set before
shipment as shown below.
Input/Output
Connector Pin No.
Name
Input 1 CN17 (1-2)
Input 2 CN17 (2-3)
Input 3 CN18 (1-2)
Output 1 CN16 (1-2)
Output 2 CN16 (1-3)
PCB in Indoor Unit
Auxiliary Relay
Indoor Unit
Output
Operation Signal
Alarm Signal
Compressor ON Signal
Defrosting Signal
--
Setting Function (No.)
Fixed Heating Mode (1)
Fixed Cooling Mode (2)
Demand (3)
Operation (1)
Alarm (2)
n Picking Up "Thermo-ON" Signal during Cooling
Operation (Only for RCD-FSG(E) and RPF(l)-FSG(E)
models)
This function is utilized to pick up the cooling "Thermo-ON"
signal of compressor running. Connect wires as shown
below. The required parts are indicated in Table 4. 3. The
contact of RYa is closed when "THERMOSTAT" is ON
during cooling operation mode.
CN5 Connector
3 Pin Connector Housing (JST-XHP-3)
NOTE:
"Thermo-ON" indicates that one of the micro-computer
control function "THERMOSTAT" is ON as a
thermostat.
In the case that the above setting change is required at
site, perform the following procedures.
1. Set No. 1 pin on the dip-switch, DSW8 on the outdoor
printed circuit board at the "ON" side while the main
power to the outdoor unit is being supplied. By setting,
function selection mode is available and the following
appears on the 7-segment display.
SEG2
ú 1
Input/Output Terminal
This display indicates that the function No. 1 (Fixed
Heating Mode) is set at input 1.
PCB in Indoor Unit
Auxiliary Relay
SEG1
1
Function No.