Lincoln Electric PERKINS SA-250 - Manual (Page 21)

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ELECTRONIC IDLER TROUBLESHOOTING GUIDE
Engine Will Not Return to Idle
in Approximately 15 Seconds
Set Idler Control Switch
to the Auto Position
Check to see Whether Oil Pressure
Light is On and Alternator is Charging
Light OFF Light ON
If Oil Light is O.K., Replace Check Continuity of Idler
Oil Pressure Switch Control Switch
Continuity Good Open
1. Reed Switch in Weld Replace Switch
Circuit may be Stuck Closed
2. Check Continuity of Idler
Solenoid Coil (25 ohms)
3. Replace P.C. Board
Engine Will Not Pick Up Speed When:
The Arc is Struck The Auxiliary Power
Load is Turned On
Reed Switch in Weld Circuit
Defective. Will Not Close Power Load Too Small
Try Load Above 150 Watts
To Check; Short the Red Lead
on P.C. Board to Welder Frame
Engine Does Not Pick Up Speed
Replace P.C. Board
Engine Picks Up Engine Does Not
Speed When Arc Pick Up Speed
is Struck
Replace P.C. Board
Replace Reed Switch
in Weld Circuit