Lincoln Electric RANGER 305 D Service Manual page 77

RANGER 305D
Observe Safety Guidelines
detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
THE ENGINE WILL NOT GO INTO HIGH IDLE
WHEN ATTEMPTING TO STRIKE AN ARC, OR
WHEN A LOAD IS APPLIED TO ANY OF THE
AUXILIARY POWER RECEPTACLES.
WELDING AND AUXILIARY OUTPUTS ARE
NORMAL WHEN THE IDLE SWITCH IS IN THE
"HIGH IDLE" POSITION.
THE ENGINE GOES TO LOW IDLE, BUT WILL
NOT STAY AT LOW IDLE.
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely,
contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
ENGINE AND IDLE PROBLEMS
POSSIBLE AREAS OF
MISADJUSTMENT(S)
1. CHECK THAT THE WELDING CABLES AND
THE AUXILIARY POWER LEAD
CONNECTIONS ARE TIGHT.
1. MAKE SURE THERE ARE NO EXTERNAL
LOADS ON EITHER THE WELD
TERMINALS OR THE AUXILIARY
RECEPTACLES.
2. CHECK THAT THE WELDING CABLES AND
THE AUXILIARY POWER LEAD
CONNECTIONS ARE TIGHT AND THAT
THE INSULATION IS UNDAMAGED.
C UTION
F 20
TROUBLESHOOTING & REPAIR
TROUBLESHOOTING GUIDE
RECOMMENDED
COURSE OF ACTION
1. THE WELD CONTROL PC BOARD MAY BE
DEFECTIVE.
1. THE IDLER SOLENOID LINKAGE MAY BE
DAMAGED OR OUT OF
ADJUSTMENT. MAKE SURE THE
SOLENOID PLUNGER IS ABLE TO FULLY
SEAT AGAINST THE INTERNAL STOP OF
THE SOLENOID COIL ASSEMBLY.
2. THE LOW IDLE RPM MAY BE TOO LOW.
PERFORM THE ENGINE THROTTLE
ADJUSTMENT TEST.
3. THE SOLENOID HOLD COIL POWER
CIRCUIT MAY BE FAULTY. CHECK
WIRING AND CONNECTIONS ON LEAD
#210A AND LEAD #215.
4. THE WELD CONTROL PC BOARD MAY BE
DEFECTIVE.