Lincoln Electric IM664 Multi-Weld 350 Arc Converter - Manual (Page 23)

E-2 TROUBLESHOOTING E-2
MULTI-WELD 350
Observe all Safety Guidelines detailed throughout this manual
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
CAUTION
PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
Machine completely dead:
Input contactor does not pull in,
meters are off.
Meter turns on but input contator
does not pull in.
Thermal light comes on.
1. Check Input cable connections for
loose or faulty connection.
2. Input voltage may be too low.
3. The power switch may be faulty.
4. The DC Buss Power Supply PCB
or its connections may be faulty.
5. The Analog Control Power Supply
PCB may be faulty.
6. The Weld Control PCB may be
faulty.
1. Input to high
2. Remote receptacle output switch-
ing enabled.
3. The contactor or supply voltage to
contactor coil may be faulty.
4. The connections at PCB connec-
tors inside the control box may be
faulty.
5. The Peripheral PCB may be
faulty.
6. The Weld Control PCB may be
faulty.
1. Over- Temperature shut down.
2. The thermostat or imbalance pro-
tector or Peak Input Voltage
Protection (if present) or their con-
nections may be faulty.
3. Bad analog control Supply PCB.
4. Bad weld control PCB.
If all recommended possible areas of
misadjustment have been checked
and the problem persists, Contact
your local Lincoln Authorized
Field Service Facility.