Manuals / Lincoln Electric / Power Tools / Welder

Lincoln Electric SVM194-A service manual Engine goes to low idle, but

Models: SVM194-A

1 232
Download 232 pages 49.12 Kb
Page 141
Image 141

Return to Section TOC Return to Master TOC

Return to Section TOC Return to Master TOC

Return to Section TOC Return to Master TOC

 

F-19

TROUBLESHOOTING AND REPAIR

F-19

 

Observe Safety Guidelines detailed in the beginning of this manual.

 

 

 

 

 

PROBLEMS

POSSIBLE AREAS OF

RECOMMENDED

 

 

 

 

 

 

(SYMPTOMS)

MISADJUSTMENT(S)

COURSE OF ACTION

 

 

The engine goes to low idle, but

FUNCTION PROBLEMS

 

 

 

 

The low idle RPM may be too

 

Make sure there are no

 

will not stay at low idle. The

external loads on the weld

low. Perform the engine idle

 

machine has normal weld and

terminals or the auxiliary

adjustment procedure.

 

auxiliary output. The engine

power receptacles. Disconnect

The idle solenoid linkage may

 

starts and shuts down normally.

the weld cables and unplug

be out of adjustment. Check

 

 

 

anything that may be

that the linkage moves freely

 

 

 

connected to the auxiliary

and that the plunger is not

 

 

 

receptacles.

binding in any way. Check

 

 

 

 

that the solenoid can freely

 

 

 

 

pull in and solidly seat

 

 

 

 

against its internal stop.

 

 

 

 

The idle solenoid may have

 

 

 

 

failed.

Disconnect the

 

 

 

 

solenoid leads and check the

 

 

 

 

resistance of the solenoid

 

 

 

 

coil. See machine schematic

 

 

 

 

for correct solenoid

 

 

 

 

resistance. Check the

 

 

 

 

solenoid for a grounded coil;

 

 

 

 

the resistance between

 

 

 

 

chassis ground and either

 

 

 

 

solenoid lead wire should be

 

 

 

 

500k Ohms (500,000 Ohms)

 

 

 

 

minimum.

 

 

 

 

There may be a poor or

 

 

 

 

intermittent connection in the

 

 

 

 

solenoid wiring, or a

 

 

 

 

component may be opening

 

 

 

 

while under load. Check the

 

 

 

 

idle switch and the wiring

 

 

 

 

between the switch, the

 

 

 

 

solenoid, and the PC Board.

 

 

 

 

Repair or replace any poor

 

 

 

 

connections, damaged wiring,

 

 

 

 

or faulty components. (See

 

 

 

 

wiring diagram)

 

 

 

 

The idle/engine protection PC

 

 

 

 

board may be faulty.

Return to Section TOC Return to Master TOC

CAUTION

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.

CLASSIC® 300D & 300G

Page 140 Page 142
Page 141
Image 141
Lincoln Electric SVM194-A service manual Engine goes to low idle, but
Page 140 Page 142