Outdoor Unit - Hitachi RPI-0.8FSG1 Service Manual

4.3

Outdoor Unit

On the outdoor unit printed circuit board, there are three input terminals to receive external signals and two
or five output terminals to send signals outwards. These signals are available by setting as shown below.
Function No.
1 Fixing Heating Mode
2 Fixing Cooling Mode
3 Demand
4 Snow Sensor
5 Enforced Stoppage
6 Demand Current Control 80%
7 Demand Current Control 70%
8 Demand Current Control 60%
Each input terminal and output terminal are set before shipment as shown below.
Input/Output
Name
Input 1
Input 2
Input 3
Output 1
Output 2
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.
This display indicates that the function No. 1 (Fixed Heating Mode) is set at input 1.
Input
Connector Pin No.
CN17 (1-2)
CN17 (2-3)
CN18 (1-2)
CN16 (1-2)
CN16 (1-3)
SEG2
Input/Output Terminal
Output
Operation Signal
Alarm Signal
Compressor ON Signal
Defrosting Signal
--
Only for 24 and 30HP
Setting Function (No.)
Fixed Heating Mode (1)
Fixed Cooling Mode (2)
Demand (3)
Operation (1)
Alarm (2)
SEG1
Function No.
OPTIONAL FUNCTION
(4.3 Outdoor Unit)
4-25