Carrier Supra Series - Manual Defrost

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10. Manual Defrost
Defrost is an independent cycle overriding cooling and heating function to
de-ice the evaporator as required.
1. Check that box temperature on the display is 40°F (4.4°C) or lower.
2. Press the Defrost key to initiate Manual Defrost.
If defrost is initiated successfully, the Defrost icon remains and “dF” is
displayed in the Box Temperature area for 10 seconds without box temp
and other icons. Then, the default display returns while the Defrost icon
and “dF” display remains for the duration of the defrost.
If defrost does not initiate, the Defrost icon turns off and “no dF” is
displayed in the Box Temperature area for 10 seconds without box temp
and other icons. Then, the default display returns along with a display of
box temperature.
Defrost may be terminated in any of three ways:
• Timer initiation
• Air switch initiation
• Manually
1
2
Defrost Indicator
Defrost Icon