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F-6

TROUBLESHOOTING & REPAIR

 

 

 

F-6

TROUBLESHOOTING GUIDE

 

 

 

Observe Safety Guidelines

 

 

detailed in the beginning of this manual.

 

 

 

 

 

 

 

PROBLEMS

 

POSSIBLE AREAS OF

RECOMMENDED

 

 

 

(SYMPTOMS)

 

MISADJUSTMENT(S)

COURSE OF ACTION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FEEDING PROBLEMS

 

 

 

 

 

 

 

No output or reduced output the first

Check input voltages, fuses, and

Check continuity of 3-amp slow

time power is applied to machine.

input voltage reconnect procedures.

blow fuse located on reconnect

 

 

See Installation section.

panel.

 

 

 

 

 

 

 

If high input (380 VAC or higher)

See Input

Filter

Capacitor

 

 

voltage is applied. Capacitors may

Conditioning

in this section

 

 

 

 

need conditioning.

 

 

 

 

 

 

 

 

 

 

 

 

Output turns on momentarily, then

Check input voltages and recon-

1.

See Thermal Protection AC

switches off and repeats cycle.

nection procedures. See Instal-

 

Trigger Circuit test.

 

 

 

 

 

lation section.

2.

See Overvoltage Protection

 

 

 

 

 

Check output terminal switch S4

 

DC Trigger Circuit test.

 

 

 

 

and/or Remote Trigger Options

3.

See Capacitor Balance

test.

 

 

(i.e., wire feeders, guns, cables,

 

 

etc.).

 

NOTE: This test is necessary

 

 

 

 

only if machine is connected

 

 

 

 

for 380 VAC or higher.

 

 

 

 

 

4.

See Switch PC Board test.

 

 

 

5.

See Snubber Resistor test

 

 

 

 

 

 

 

Remote output control not function-

Test or replace Output Remote

1.

Test

Local/Remote

Switch S3

ing. Machine performs well on

Control Device

 

with

ohmmeter. See

Wiring

LOCAL control.

 

 

 

Diagram in Section G.

 

 

 

 

 

2.

Check continuity of local/remote

 

 

 

 

circuit. See schematic drawing

 

 

 

 

in Section G.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con- tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.

V300-I

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Lincoln Electric SVM101-B service manual Feeding Problems