4-27. AIR PRESSURE SWITCH.
This task consists of:
INITIAL SETUP: I
General Safety Requirements:
Tool Box, General Mechanics (Item 1, App B)
Multimeter (Item 2, App B)
Contact with hot components can cause burns.
Allow unit to cool down before attempting
Lockwashers (Item 15, App H)
Tags, Wire (Item 9, App E)
Contact with hot components can cause burns. Allow unit to cool down before attempting
Testing (Refer to Figure 4-40)
Open control panel cover (1) and control panel lid (2).
Electrical high voltage cannot be seen, but it can kill you. Electricity is unlike most other
dangerous things you can come in contact with because it gives no warning and no symptoms
to be wary of. Its effect is immediate. It can kill you, render you unconscious, or severely burn
you. To ensure your safety and that of other maintenance personnel, always observe the
following precautions: BE CERTAIN that there is someone assisting you who can remove power
FOR ARTIFICIAL RESPIRATION, REFER TO FM 21-11.
Connect power cable (3) to power source.
Connect a multimeter to TB1 (4), terminals TB1-10 and TB1-11. If meter indicated continuity, switch is
closed; leave multimeter connected and proceed to paragraph e, Adjustment.