Help Displays; Troubleshooting - Miller XMT 350 VS Auto-Line w/WCC Owner's Manual

7-3. Help Displays

.
All directions are in reference to the
front of the unit. All circuitry referred
to is located inside the unit.

7-4. Troubleshooting

Trouble
No weld output; unit completely inop-
erative.
No weld output; meter display On.
Erratic or improper weld output.
Unit will not associate.
V
HE.L P−1
V
HE.L P−2
V
HE.L P−3
V
HE.L P−5
V
HE.L P−6
V
HE.L P−8
V
PrO CES
Place line disconnect switch in On position (see Sections 5-6and 5-7).
Check and replace line fuse(s), if necessary, or reset circuit breaker (see Section5-6and 5-7).
Check for proper input power connections (see Section 5-6 and 5-7).
Input voltage outside acceptable range of variation (see Section 5-5).
Unit overheated. Allow unit to cool with fan On (see Section 4-4).
Use proper size and type of weld cable (see Section 5-4).
Clean and tighten all weld connections.
Check for correct polarity.
Check mode switch position on power source. Association will not occur in LIFT ARC TIG mode.
A
Help 1 Display
Indicates a malfunction in the primary power
circuit. If this display is shown, contact a Fac-
tory Authorized Service Agent.
Help 2 Display
A
Indicates a malfunction in the thermal protec-
tion circuitry. If this display is shown, contact
a Factory Authorized Service Agent.
Help 3 Display
Indicates the left side of the unit has over-
A
heated. The unit has shut down to allow the
fan to cool it (see Section 4-4). Operation will
continue when the unit has cooled.
Help 5 Display
Indicates the right side of the unit has over-
heated. The unit has shut down to allow the
A
fan to cool it (see Section 4-4). Operation will
continue when the unit has cooled.
Help 6 Display
Indicates operation at maximum input cur-
rent. The unit has a maximum allowable input
A current limit. As the line voltage decreases,
the required input current increases. If the line
voltage is too low, the output power is limited
by the input current. When this limit is
reached, the unit automatically reduces out-
put power to continue operation. If this display
is shown, have a qualified electrician check
A
the input voltage.
Help 8 Display
Indicates a malfunction in the secondary
power circuit of the unit. If this display is
shown, contact a Factory Authorized Service
Agent.
A
Process Display
Indicates unknown process, turn process se-
lect switch to align with tick mark.
Remedy
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