Instruction manual

Instruction manual
20220513E 85
4 MAINTENANCE
4.1 Control unit
The AP11 Control Unit will under normal use require little
maintenance as the cases are made from high impact
material (polycarbonate) to withstand the rigours of an
exposed cockpit. It is important to avoid using chemical
cleaners and hydrocarbons such as diesel, petrol etc.
If the instrument requires any form of cleaning, use fresh
water and a mild soap solution (not a detergent).
It is advisable at the start of each season to check all
connections to the control unit head and cover with silicone
grease, Vaseline or WD40. The desiccant pack at the rear of
the instrument above the terminal block should be removed
and dried if signs of condensation appear on the instrument
glass. This can be achieved by partially removing the M3
screw and pulling on the screw. The pack can then be dried
by placing in a warm place for 24 hours. Do not use gas
oven for this purpose.
Removal of the Control Unit
To remove the control unit,
the outer cover must first be
removed. This can be done
by squeezing the sides
between finger and thumb
and applying an upward
pressure. At the same time
place a wide bladed
screwdriver between the
bulkhead or panel and the
cover, and gently rotate.
Then remove the four fixing
screws securing the head in
place, and very gently lever
off the head.