V6-i VRF 50/60Hz 
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Part 
6 - Diagnosis and Troubleshooting
 
2.23 PP: Compressor discharge insufficient superheat protection 
 Digital display output 2.23.1
   
   
 Description 2.23.2
  Compressor discharge insufficient superheat protection.   
  All units stop running.   
  Error code is only displayed on the unit with the error. 
 
 Trigger / recover condition 2.23.3
  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 2.23.4
  Temperature sensor not connected properly or has malfunctioned. 
  Poor temperature sensor heat insulation. 
  Excess refrigerant. 
  Discharge pressure too high. 
  Main PCB damaged.