E-3

 

TROUBLESHOOTING

 

 

 

 

E-3

 

 

 

 

 

 

 

 

 

 

Observe all Safety Guidelines detailed throughout this manual

 

 

 

 

 

 

 

 

 

 

PROBLEMS

 

POSSIBLE AREAS OF

 

RECOMMENDED

 

(SYMPTOMS)

 

MISADJUSTMENTS

 

COURSE OF ACTION

 

 

 

 

 

 

 

 

 

 

 

 

METER PROBLEMS

 

 

 

 

 

 

 

 

 

 

 

 

Meter does not light up

1. Bad meter or its connection

 

 

 

 

 

 

 

2.

Bad connection at P8 of Control

 

 

 

 

 

 

 

 

PC board

If all recommended possible areas

 

 

 

 

 

 

3.

Faulty Control PC board

of

misadjustment

have

been

 

 

 

 

checked and the problem persists,

 

 

 

 

Contact

your

local

Lincoln

Meter does not display V (Volt) or

1. Bad Display switch or its connec-

Authorized Field Service Facility.

Min A (Minimum current)

 

tion

 

 

 

 

 

 

 

2.

Bad connection at P9 of Control

 

 

 

 

 

 

 

 

PC board

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GAS PROBLEMS

 

 

 

 

 

No gas

1. Circuit breaker CB1 open. Press

 

 

 

 

 

 

 

 

CB1 in to reset

 

 

 

 

 

 

 

2.

Bad connection at P12 of Control

 

 

 

 

 

 

 

 

PC board

 

 

 

 

 

 

 

3.

Faulty gas solenoid valve SV1 or

 

 

 

 

 

 

 

 

its connection

 

 

 

 

 

 

 

4.

Faulty Control PC board

 

 

 

 

 

 

 

 

 

 

 

 

No control on post flow time

1. Faulty potentiometer R3 or its

 

 

 

 

 

 

 

 

connection

 

 

 

 

 

 

 

2.

Bad connection at P9 of Control

If all recommended possible areas

 

 

of

misadjustment

have

been

 

 

 

PC board

 

 

 

checked and the problem persists,

 

 

 

 

Pre flow & Post flow time too long

1. If an Advanced Control PC board

Contact

your local

Lincoln

Authorized Field Service Facility.

 

 

 

was installed, check setting of

 

 

 

 

 

 

 

 

 

 

 

DIP switch on that board

 

 

 

 

 

 

 

2. Missing plug P3 on Control board

 

 

 

 

 

 

 

 

or bad connection at P3 when an

 

 

 

 

 

 

 

 

Advanced Control PC board is not

 

 

 

 

 

 

 

 

present

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CAUTION

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.

PRECISION TIG 375

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Lincoln Electric IM703-A manual Meter Problems, GAS Problems