8.3 Push-button
8.3.1
General characteristics
Single-button versions are used.
These differ as regards the number and functionality of the contacts:
switch
-
-
deviator (single- or two-pole)
8.3.2
Electrical symbol
Normally-closed switch
Normally-open switch
Deviator
8.3.3
Checking for efficiency
DOES NOT POWER THE APPLIANCE OR DOES NOT PERFORM THE SPECIFIC FUNCTION:
-
Use a tester to check for correct closure (or aperture) of the various contacts.
Press the button and check for switching of the contacts.
-
IMPOSSIBLE TO ACTION THE BUTTON
Check that the spindle is not broken and that there are no other mechanical problems
-
(friction/breakage of couplings to cross-member).
SOI/DT 2002-05 eb
62
599 35 23-17