Electrical Wiring Diagram - Trane MW(C)W509 Installation & Operation Manual

Electrical wiring diagram

Note: Communication wires
are assigned by users. It is
recommended to use shield
twisted pair and pay attention
to the polarity. Port A and B
of two indoor units or indoor
unit and outdoor unit can not
be reversed. Connect shield
ground wire to port G of DIP
board.
The DIP board can connect
multiple communication
wires of indoor units.
CN8
CN3
M2
Power transformer
Step motor
14
Connect to other indoor
or outdoor units
A B G
Communication
wires
A B G
CN2
AP3 DIP board
CN1
8
CN9
AP1 PCB
CN20
CN4
2
TC
RT2
20k
II
I
Outlet pipe
I I I
temperature
sensing bulb
Display board
AP4
CN15
CN1
CN19 CN18
3 4
RT3 RT4 RT1
20k 20k 15k
Middle pipe Inlet pipe
temperature temperature temperature
sensing bulb sensing bulb sensing bulb
Yellow/green
X1
X2
CN2 AC-L N
CN6
CN5
CN17
CN12
1
EXV
Ambient Electronic
expansion
valve
Power supply
Brown
L
Blue
N
PE
PE
Evaporator
M1
Fan motor
63624329
AMS-SVX03A-EN