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9.
CHECKING FUNCTIONAL
MEMBERS
9-1
VOLTMETER
Check the voltmeter
if
it is turned on by applying
specific voltage. Voltmeter cannot be checked with
circuit tester because its resistance is too large.
0
Check that no disconnection nor short-circuit
occurs with a tester, and the internal resistance
is around OOk ohms normally.
@
Turn on the commercial power supply input
and check the indication.
9-2
AC RECEPTACLES
Using a “Dr. Robin” or a circuit tester, check con-
tinuity between the two terminals at the rear of
the
AC
receptacles while the receptacle
is
mounted on the control panel. When continuity is
found between the
output
terminals of the recep-
tacle with a wire connected across these termi-
nals, the
AC
receptacle
is
normal. When the wire
is removed and no continuity is found between
these terminals, the receptacles are also normal.
9-3
NO-FUSE
BREAKER
Check continuity between each of two terminals
at the rear of the no-fuse breaker while it is
mounted on the control panel. Normally, there
is
continuity between each of the
two
when the no-
fuse
breaker is on while there is no continuity when
the no-fuse breaker is
off.
VOLTMETER
Fig.
9-7
Fig.
9-2
I
Fig.
9-3
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29-