Trane 4TXM2318BF300AA Service Manual page 139

[18] Compressor Out Of Control Circuit
Check if voltage of power
supply is normal
Check if wire between
power module and
compressor are correct
If power module is normal
If compressor is
normal(compressor coil
resistor, insulation)
Compressor load
too much, check the
Y
Y
Y
Y
reason
N
Improve power supply circuit
N
Correct the wiring due to diagram
N
Replace power module
N
Repalce compressor
137