Lincoln Electric 355M Manuel d'utilisateur télécharger pdf (Page 53)

FUNCTION PROBLEMS

Observe Safety Guidelines detailed in the beginning of this manual.

PROBLEMS

(SYMPTOMS)

POSSIBLE AREAS OF

MISADJUSTMENT(S)

RECOMMENDED

COURSE OF ACTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely,

contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed.

Call 1-888-935-3877.

CAUTION

TROUBLESHOOTING AND REPAIR

F-7 F-7

POWER WAVE 355M/405M

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The machine often “noodle welds”

with a particular procedure. The

output is limited to approximately

100 amps.

1. The machine may be trying to

deliver too much power. When

the average output current

exceeds a maximum limit, the

machine will “phase back” to

protect itself. Adjust the proce-

dure or reduce the load to lower

the current draw from the Power

Wave machine.

1. Perform the Current

Transducer Test.

2. The control board may be faulty.

Excessively long and erratic arc. 1. Check for proper configuration

and implementation of voltage

sensing circuits.

1. Check the connections between

the voltage sense receptacle

and the control board. See the

Wiring Diagram.

2. The control board may be faulty.

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Lincoln Electric 355M Manuel d'utilisateur Page 53