Trane TVR Pro CO Series - 2.25 PP: Compressor discharge insufficient superheat protection; 2.25.1 Digital display output; 2.25.2 Description; 2.25.3 Trigger; recover condition

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2.25 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
o
C for 20 minutes or ≤ 5
o
C for 60 minutes.
 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.