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16.9: Defrost
When defrosting (dEF), the user interface display will appear as seen below:
Defrost can be achieved either automatically or manually. A manual defrost can be activated by
holding the minus and lock keys simultaneously for a period of three seconds. Once defrost is
activated the Use Interface will flash “dEF” three times before showing an uninterrupted “dEF”.
More information is available in Section 5.
Defrosting of the refrigerator freezer is unique from any of the Marvel and Marvel
Under counter products. The components are very similar to those in a domestic
full size refrigerator. The system includes a defrost heater, defrost thermistor, and a
defrost termination thermostat.
The damper to the fresh food compartment will close during defrosts. This serves as
a dual purpose; it will concentrate more heat for clearing the evaporator while also
eliminating any residual heat transferring back to the fresh food compartment.
The timer function is programed into the main control board.
o The defrost cycle is programmed to activate after 8 hours of compressor run
time.
o NOTE: In a 90°F ambient, a typical defrost time will average approximately
17 minutes from compressor off, to compressor on time.
16.9.1: Defrost Function
The defrost cycle is activated by a timed event from the main control board. The
programmed event will last for a 25 minute maximum defrost duration.
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