What does df on interior unit mean? - Office Equipment & Supplies

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There is an OD and dF error codes. They are related to a sensor inside the unit. Could it be one of those? Not sure what you mean about shabbath

In defrosting mode, The LED displays “dF” or alternative displays between running frequency and “dF” (each displays 0.5s)
This means the outdoor unit is in defrost mode, heat pumps will initiate defrost upon demand. Its a normal operation code

Hey Iva,
Here is the manual.. this should help you with any questions you may have..
https://www.lowrance.com/Root/Lowrance-Documents/LMS525CDF-520C_0151-461_120706.pdf

defrost mode

Try the steps suggested here : Fix Error Processing Purchase DF BPA 30 on Android Play Store

see the cable inside the scener unit is broken or check foil conctvity

Defrost. You may need your defrost timer replaced or the heater cable or thermal cutoff replaced

Hello Shirley - Typically error code ER01 indicates that a water leak is detected under the tub. Unit will possibly need a hydraulic kit. Try unplugging the unit or flipping the household circuit breaker off. Wait approximately ten minutes and turn the unit back on. Could the error code DF possibly be PF? If so, PF means power failure and you should be able to start a cycle. If the error code continues to display on dishwasher then I suggest contacting a professional to accurately diagnose and repair it.

if the unit is not produceing a charge during daylight then it is the unit. the DF-SP-LI will produce full power under sunlight alone. test the unit with the fence unhooked.