121 Discharge Pressure Sensor Error MP4000

Description 

Discharge Pressure Sensor Error 

  • Occurs during Normal Run if the sensor is detected to be out of range, open or short circuit. 
  • Occurs during pretrip (PTI) test if the sensor readings do not act correct during compressor activity. 
  • Expected to increase 0,15Bar from stopped to compressor running loaded. 
  • Indicates: 
  • Wrong location of the sensor. 
  • Sensor failure. 

Corrective Action 

  • Using DATA menu evaluate sensor readings. 
  • Check wiring to be correct and connected. 
  • Check J1plug is plugged into MRB. 
  • Check voltage at J1 pin4 to be 0.5 – 4.5 VDC. 
  • Replace sensor.

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