Trane 4TVH0086FE000AA Service Manual page 125

2.22 PP: Compressor discharge insufficient superheat protection
Digital display output
Description
 Compressor discharge insufficient superheat protection.
 All units stop running.
 Error code is only displayed on the unit with the error.
Trigger / recover condition
 Trigger condition: Discharge gas superheat is ≤ 0
 Recover condition: Discharge gas superheat go back to normal value.
 Reset method: Resume automatically.
Possible causes
 Temperature sensor not connected properly or has malfunctioned.
 Poor temperature sensor heat insulation.
 Excess refrigerant.
 Discharge pressure too high.
 Main PCB damaged.
o C for 20 minutes or ≤ 5
124
o C for 60 minutes.