56 Compressor Temperature Too High (Shutdown Alarm) Model CSR

Thermo King Alarm Code

Description

Corrective Action

Compressor Temperature Too High (Shutdown Alarm) Compressor discharge temperature is above 148 C (298 F). Compressor stopped until discharge temperature decreases to normal; Indicates: Air in refrigeration system Low refrigerant charge Defective compressor or valve plate Defective liquid injection system Wrong or defective sensor

Check the refrigerant charge using the “Unit Health Check Procedure” on page 6-5.  Enter Manual Function Test menu and test (operate) Injection Valve to determine if valve opens (energizes). Check compressor discharge sensor resistance. Resistance must be 100,000 ohms at 25 C (77 F).  Check discharge temperature with a separate electronic thermometer and compare to “HIGH PR TEMP” shown in the Data menu of controller. NOTE: Unit will operate normally without compressor sensor. However, controller compressor high temperature protection is not active.