Step 00

7883 - Panel 1 Check that the cabinet penetrations for the lights, speaker, a...

Panel 1
Check that the cabinet penetrations for the lights, speaker, and occupancy sensors are sealed well.  
If the door gasket is leaking, VERY CAREFULLY try to tighten the door latches, they are plastic, if you break them you have to replace the door. 
Panel 2
Bolts and weep holes on both sides of the lower cabinet should be caulked and sealed.
Main cable penetration should be sealed with engineered solution or expanding foam.
Panel 3
There is a little gutter above each door opening that holds water and may allow it to seep into the cabinet. Check that installer cut a slot in the side of the door gutter to let the water drain out.
Ensure that there is silicone sealant on the gaskets at each end of the middle crossbars, both ends, above all six doors. 
Potential problem area. Both ends, all six doors.

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Image displays RPM panel locations to inspect for penetrations or leaking