PTAC Service Manual

Service Manual
Technical Information
55
5.2 PCB Printed Diagram
5.2.1 Silk Screen on Main Board 1
ƔTop View
ƔBottom View
1 Interface of strong electroplax
2 7805 voltage-regulator block
3 7812 voltage-regulator block
4 Indoor tube temperature sensor
5 Indoor ambient temperature sensor
6 Outdoor tube temperature sensor
7 Interface of display
8 AC 24V voltage input
9
Selection for heat pump and pure
electric heating
1
2
4356
7
89