54 High Pressure Cutout Switch On Error (Check Alarm) Model CSR

Thermo King Alarm Code
Description Corrective Action
High Pressure Cutout Switch On Error (Check Alarm)
  • Occurs during pretrip (PTI) test only.
  • Compressor does not start within normal time during high pressure cutout switch test.
  • Indicates:
  • High pressure cutout switch did not respond to pressure change within 5 seconds
  • Air in refrigeration system
  • Defective high pressure cutout switch
  • Enter Manual Function Test menu. Start the following components together: compressor 100%, compressor and evaporator fans (high). Discharge pressure should increase and compressor should stop (high pressure cutout switch opens). Then start the condenser fan. Discharge pressure must decrease quickly and compressor should start (switch closes).

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