The correct main (i.e. primary) fuse for the Exterior 1200 Wash™ and Exterior 1200 Image Projector™ is the 17.5 AT (slow blow), 600 V, CC midget fuse available as a spare part from Martin™ (P/N 05020045).

The earliest Exterior 1200s were supplied with a 15 A main fuse installed. We changed to a 17.5 A main fuse soon after we launched the product, but the user manuals and online specifications were not updated everywhere that the main fuse is mentioned. Both 15 A and 17.5 A fuses are approved for the Exterior 1200, but the 15 A fuse is no longer available from Martin™.