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DUAL MAVERICK
®
450 (AU)
PROBLEMS
(SYMPTOMS)
No weld output
No output control – at the front panel
No output control – with remote
Output control range is limited while
using a remote.
The arc is not stable.
VRD (Volts < 30) not showing on the
display
VRD(Volts<30) switching on and off
when not welding
Operator Selector Switch (SINGLE /
DUAL) is not functioning properly
Wire Feeder does not work when control
cable is connected to 14 pin
connector.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Lincoln Authorized Service Facility for technical troubleshooting assistance before you proceed.
WWW.LINCOLNELECTRIC.COM/LOCATOR
POSSIBLE
CAUSE
WELDING
1. Verify the weld output is ON. A green icon with
"Output ON" appears in the upper right corner
of screen whenever weld output is ON.
2. Verify the work connection is tight and attached
clean base metal.
3. If in CV mode check that "CV TRIGGER
OVERRIDE" is not set to "REMOTE".
4. Faulty Field Relay(CR3). Located under the right
control pc board.
5. Faulty PC board
1. Verify the remote control is not turned on.
"Remote ON" appears on the bottom left of
the screen whenever the remote is turned on.
2. Faulty encoder, replace.
1. Verify the remote control is not turned on.
"Remote ON" appears on the bottom left of
the screen whenever the remote is turned on.
2. Verify the remote control is turned on. "Remote
ON" appears on the display screen.
1. While in the weld mode, go to the remote screen
and change the scaling of the remote.
1. Verify the polarity of the electrode and work
cables.
2. Cables may be excessively long, undersized or
damaged.
3. Verify the weld settings match the electrode.
Use Ready-Set-Weld, menu for guidance.
1. Ensure VRD ON/OFF switch on the PCB is
switched to the "RIGHT" to turn VRD "ON".
2. Faulty 250 ohm resistor (R2 / R1) for loose wire
connection.
3. Faulty PC board.
1. Disconnect any external resistance on the
output studs, such as Across The Arc Wire
Feeder.
1. Micro switch inside of polarity switch is bad.
2. Loose wire connection from micro switch in
polarity switch to right side control PC board.
3. Faulty polarity switch.
1.
Wire Feeder circuit breaker open. Check (42V)
breaker and reset if tripped.
2.
Faulty control cable. Repair or replace cable.
3.
Faulty wire feeder. Replace wire feeder.
E-3
TROUBLESHOOTING
RECOMMENDED
COURSE OF ACTION
If all recommended possible areas of
misadjustment have been checked and
the problem persists, Contact your local
Lincoln Authorized Field Service Facility.
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