Lincoln Electric IM529 CLASSIC III D - Manual (Page 23)

E-3 TROUBLESHOOTING
CLASSIC III AND IIID
E-3
ELECTRONIC IDLER TROUBLESHOOTING GUIDE
Engine Will Not Return to Idle
in Approximately 15 Seconds
Set Idler Control Switch
to the Auto Position
Check Continuity of Idler
Control Switch
Continuity Good Open
1. Reed Switch in Weld Circuit May be Replace Switch
Closed.
2. Check Continuity of Idler Solenoid Coil
(8.5 - 9.0 ohms) & Leads.
3. Check Ground Connections in Idle Circuit.
4. Replace P.C. Board.
Engine Will Not Pick Up Speed When:
The Arc is Struck
Reed Switch in Weld Circuit
Defective -- Will Not Close
To Check: Short the Red Lead
on P.C. Board to Welder Frame.
The Auxiliary Power is Loaded
Power Load Too Small
Try Load Above 150 Watts
Engine Does Not Pick Up Speed
Check Connections and Continuity of
Current Transformer.
Replace P.C. Board
Engine Picks Up Speed
1. Check for Break in
Red Lead and Repair
2. Replace Reed Switch
in Weld Circuit.
Engine Does Not Pick
Up Speed
Replace P.C. Board
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.
CAUTION