1. Screw
2. Top cover
3. Fuse holder
4. Speed/power link: LK1
5. Link LK1 in speed configuration
6. Link LK1 in power configuration
7. Link LK6 not active: Vent On Fail not selected
8. Link LK6 active: Vent On Fail selected
9. Link LK5 not active: Vent On Stop not selected
10.Link LK5 active: Vent On Stop selected
11.Link LK4 not active: Timer disabled
12.Link LK4 active: Timer enabled