AC MGA0800/A1, User Manual

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7
to r short circuit of the return air, and poor cooling effect, etc.;
3)
carrying or moving the air conditioner should be careful to avoid colliding it and scratching
its surface coating;
3.3
Electrical installation
（
1
）
Power input port
Item
Port
Definition
Live
L
power input cable L
Null N
power input cable N
Earth PE
Earth line
（
2
）
Alarm output and signal input port
Item Port
Definition
+ RS485 communication interface RS485A RS485 communication ports (+)
- RS485 communication interface RS485B RS485 communication ports (-)
The public alarm dry nod (NO)
NO It is normally open if no alarm
The public alarm dry nod (COM)
COM common port
The public alarm dry nod (NC)
NC It is normally close if no alarm