Pcb Printed Diagram - Lennox LNWR21X Service Manual

5.2 PCB Printed Diagram

5.2.1 Silk screen on main board
Main board
● TOP VIEW
5
1 Input of live wire
Tube
6 temperature
sensor
11 Fan (high speed)
● BOTTOM VIEW
14
6 7 8
2 fuse 3
Ambient
7 t e m p e r a t u r e 8
sensor
Fan (medium
12 13
speed)
9 10 11
4
12V power input 4 buzzer
Outdoor tube
temperature 9 swing
sensor
Neutral
Fan (low speed) 14
wire
12 13
3 2
Interface of
5
display board
10 4-way valve
Power input of
15
power board
Technical Information
Service Manual
14
15
1