– Any stainless steel exterior should be wiped with mild  soap and water.  

– A model with a cold rail must be turned off at night to allow for defrost. Once defrosted, wipe excess water dry.

– If the unit has a well drain line or condensation drain line, an inspection for debris should be conducted weekly to ensure proper operation. If clogging or debris is found, use a pipe cleaning brush to clean out the hoses. Normal operation may loosen drain lines, inspect for loose hoses. If you notice water accumulation on the inside of the unit, inspect if the evaporator condensation drain line tube is loose or disconnected. If you notice water underneath the unit, inspect the drain line tube properly inside the evaporator pan.

– Clean condenser coil. How dirty the coil is will determine  the method to clean it. 

– Method 1:

Remove light build-up with a soft brush or vacuum with a brush attachment. Brush fins from  top to bottom not side to side. Shine a light through  the coil to make sure there is no dirt inside the coil. 

– Method 2: 

Clean moderately dirty fins with  compressed air blowing from the inside out and also  brushing if needed. 

– Method 3:

If the condenser coil is loaded with  grease or other debris you may need to use a coil cleaner. This can be purchased from a kitchen equipment dealer. Make sure to follow the directions  on the cleaner. 
*Helpful Video: www.YouTube.Com/DelfieldTechTalk*