Trane 4TXM2318BF300AA Service Manual page 135

[8] Discharging Temperature Overheating
Check if sensor is fixed well
If sensor resistor/
characteristic is
Check if the system is
If the system is lack of
Check if stop valve is open
Check if the PMV coil is ok
Check if the ambient temperature
Y
proper
Y
clogged
N
refrigerant
N
Y
Y
is too high
N
Reconnect
Replace pressure switch
N
Y
Check the piping system
Y
Charge refrigerant
N
Check the piping system
N
Reconnet
N
Replace connecting board
133