4-25
OPTIONAL FUNCTION
(4.3 Outdoor Unit)
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.
Each input terminal and output terminal are set before shipment as shown below.
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.
SEG2
Input/Output Terminal
SEG1
Function No.
Function No. Input Output
1 Fixing Heating Mode Operation Signal
2 Fixing Cooling Mode Alarm Signal
3 Demand Compressor ON Signal
4 Snow Sensor Defrosting Signal
5 Enforced Stoppage --
6 Demand Current Control 80%
7 Demand Current Control 70%
8 Demand Current Control 60%
Input/Output
Name
Connector Pin No. Setting Function (No.)
Input 1 CN17 (1-2) Fixed Heating Mode (1)
Input 2 CN17 (2-3) Fixed Cooling Mode (2)
Input 3 CN18 (1-2) Demand (3)
Output 1 CN16 (1-2) Operation (1)
Output 2 CN16 (1-3) Alarm (2)
Only for 24 and 30HP
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