SECTION 9 − TROUBLESHOOTING
9-1. Welding Troubleshooting
Trouble
Low or no weld output; generator pow-
er output okay at AC receptacles.
No weld output; no generator power
output at AC receptacles.
Low weld output.
High weld output.
Erratic weld output.
9-2. Generator Power Troubleshooting
Trouble
No or low generator power output at
AC receptacles; weld output okay.
No generator power output at AC re-
ceptacles; no weld output.
Low power output at AC receptacles.
High power output at AC receptacles.
Check control settings.
Check weld connections.
Have Factory Authorized Service Agent check brushes, slip rings, capacitor C1, integrated rectifiers
SR2, SR3, and SR4; and main rectifier SR1.
Be sure all equipment is disconnected from receptacles when starting unit.
Check plug PLG3 connection.
Have Factory Authorized Service Agent check brushes, slip rings, capacitor C1, and integrated rectifi-
ers SR2, SR3 and SR4.
Check control settings.
Check engine speed, and adjust if necessary (see Section 8-5).
Service air cleaner according to engine manual.
Have Factory Authorized Service Agent check brushes, slip rings, capacitor C1, integrated rectifiers
SR2, SR3, and SR4; and main rectifier SR1.
Check control settings.
Check engine speed, and adjust if necessary (see Section 8-5).
Check control settings.
Tighten and clean connections to electrode and workpiece.
Use dry, properly-stored electrodes for Stick and TIG welding.
Remove excessive coils from weld cables.
Clean and tighten connections both inside and outside welding generator.
Check engine speed, and adjust if necessary (see Section 8-5).
Have Factory Authorized Service Agent check brushes, slip rings, integrated rectifier SR2, capacitor
C1, and Fine Control R1.
Reset supplementary protectors (see Section 7-1).
Press optional GFCI receptacle Reset button (see Section 7-1).
Check plug PLG3 connection.
Have Factory Authorized Service Agent check brushes, slip rings, and integrated rectifier SR2.
Be sure all equipment is disconnected from receptacles when starting unit.
Check plug PLG3 connection.
Have Factory Authorized Service Agent check brushes, slip rings, capacitor C1, and integrated rectifi-
ers SR2, SR3, and SR4.
Increase Fine control R1 setting to max.
Check engine speed, and adjust if necessary (see Section 8-5).
.
A complete Parts List is available at www.MillerWelds.com
Remedy
Remedy
OM-237 711 Page 39