Defrost Mode

Defrost cycles are usually initiated automatically based on time and demand.

The operator can also initiate a manual defrost if necessary. Manual defrost is only available if the unit is running and the evaporator coil temperature is less than or equal to 45F (7C).

Note Other features such as door switch settings may not allow manual defrost under certain conditions.

  • If the defrost parameters are met — HMI will display “PROGRAMMING DEFROST“ followed by UNIT IS DEFROSTING”.

  • In Defrost Mode, the trailer temperature box will be replaced by defrost information and trailer temp box and dashboard will change its color to “purple”.

  • Additionally, the return air temperature (trailer temp) will be replaced by the coil icon and a intermediate spinner on top with a display progress bar for the remaining defrost time across the bottom.

    Defrost Mode Displays Shown for Single Temperature Units


    Defrost Mode Displays Shown for Multi-Temperature Units


When the defrost is complete, the HMI will display “EXITING DEFROST” for 2 seconds and return to the standard display.

Defrost Complete Displays Shown for Single Temperature Units

Defrost Complete Displays Shown for Multi-Temperature Units

HMI will display “DEFROST NOT AVAILABLE” if the defrost parameters are not met.

Failed Defrost Display Shown

Parent topic: Operating Instructions