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SECTION 7
7.3 TROUBLESHOOTING PROCEDURES
Check the problem against the symptoms in the follow-
ing troubleshooting guide. The remedy may be quite
simple. If the cause cannot be quickly located, shut off
the input power, open up the appropriate component,
and perform a simple visual inspection of all the compo-
nents and wiring. Check for secure terminal connec-
tions, loose or burned wiring or components, bulged or
leaking capacitors, or any other sign of damage or
discoloration.
The cause of control malfunctions can be found by
referring to the sequence of operations (Figure 7-1) and
electrical schematic diagram (Figures 7-2, 7-3, 7-5 and 7-
8) and checking the various components. A volt-
ohmmeter will be necessary for some of these checks.
P
R
O
B
L
E
M
. 1
R
e
d
u
c
e
d
c
o
n
s
u
m
a
e (
e l
t c
o r
d
e
l )
e f i
T
a
b
e l
- 7
. 2
P
O
S
S
B I
L
b
e l
S
e k
e l
o t
n
c
u
t t
H
e
g i
t h
c
o
n
r t
l o
P
e i
c r
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g
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a t
n
S
a t
t r
n i
g
o
n
e
c
o
t n
n i
u
o
u
s
l i p
!
Voltages in plasma cutting equipment are high enough
to cause serious injury or possibly death. Be particu-
larly careful around equipment when the covers are
removed.
Before checking voltages in the circuit, disconnect the
power from the high frequency generator to avoid dam-
aging your voltmeter.
T
o r
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. 1
C
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. 2
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. 3
G
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. 4
n I
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P
o
t i s
o i
t o
a
c r
p
a l
e t
o t
83
TROUBLESHOOTING
WARNING
NOTE
e
A
C
I T
O
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. w
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a
w
a
t s
r e
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Table of Contents
Troubleshooting
