Lincoln Electric INVERTEC V250-S Bedienungsanleitung PDF herunterladen (Seite 37)

F-5

TROUBLESHOOTING & REPAIR

F-5

INVERTEC V250-S

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 the Lincoln Electric

Service Department for technical troubleshooting assistance before you proceed. Call 216-383-2531 or 1-800-833-9353.

CAUTION

OUTPUT PROBLEMS

PROBLEMS

(SYMPTOMS)

POSSIBLE AREAS OF

MISADJUSTMENT(S)

RECOMMENDED

COURSE OF ACTION

No output but the fan operates nor-

mally.

1. The mode switch must be in one

of the SMAW modes or if in the

GTAW mode the remote trigger

circuit must be activated.

2. The Local/Remote switch (S3)

must be in the LOCAL position

unless a remote control device is

attached to the remote

receptacle.

3. If the machine has not been used

for a long time and is connected

for 380 VAC or higher, the

capacitors may need “condition-

ing”. See

Input Filter Capacitor

Conditioning

4. The machine may be overheated.

Check the thermal indicator light.

Wait for the machine to cool and

the thermostats to reset.

1. Perform the

Auxiliary

Transformer Test

2. Check for loose or broken

connections on the high current

carrying parts of the V250-S.

(i.e., output diodes, output

terminals, shunt and main

transformer connections.)

3. Check the continuity of the

normally closed thermostats and

associated wiring. See wiring

diagram.

4. Perform the

Output Diode Test

5. Perform the

Capacitor Balance

Test

6. Perform the

Protection Circuit

Test

7. Perform the

Power Board

Voltage Checks

8. Perform the

Control Board

Voltage Checks

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