Troubleshooting - Miller PipePro 304 Owner's Manual

8-11. Troubleshooting

A. Welding
Trouble
No weld output.
Ammeter and voltmeter do not work
after unit has run out of fuel.
Low weld output.
High weld output.
Weld output cannot be adjusted.
Erratic weld output.
Check control settings.
Check weld connections.
Disconnect equipment from generator power receptacles during start-up.
If using remote control, be sure mode switch is in a position that provides output control at Remote 14
receptacle (see Sections 5-8 and 6-1).
Check, repair, or replace remote control.
Unit overheated. Allow unit to run so fan cools unit (see Section 4-3).
Have Factory Authorized Service Agent check brushes, slip rings, power board PC7, voltage regulator
board PC8, interconnecting board PC2, and control board PC1.
Restart the engine.
Check control settings.
Place V/A Control switch in Panel position, or move switch to Remote position and connect remote
amperage/voltage control to Remote 14 receptacle RC14 (see Section 5-8).
Check and clean air cleaner as necessary (see Section 8-4).
Check engine speed, and adjust if necessary (see Section 8-8).
If using remote control, be sure mode switch is in a position that provides output control at Remote 14
receptacle RC14 (see Sections 5-8 and 6-1).
Have Factory Authorized Service Agent check brushes, slip rings, voltage regulator board PC8, intercon-
necting board PC2, and control board PC1.
See engine manual.
Check control settings.
Check engine speed, and adjust if necessary (see Section 8-8).
Check for obstructed movement of throttle solenoid linkage.
Have Factory Authorized Service Agent check voltage regulator board PC8 and control board PC1.
Check position of V/A Control switch (see Section 6-1).
Have Factory Authorized Service Agent check voltage regulator board PC8 and control board PC1.
Check control settings.
Clean and tighten connections both inside and outside unit.
Check and secure lead connections to A/V control.
Be sure connection to work piece is clean and tight.
Remove excessive coils from weld cables.
Use dry, properly stored electrodes.
Check engine speed, and adjust if necessary (see Section 8-8).
Have Factory Authorized Service Agent check brushes, slip rings, voltage regulator board PC8, intercon-
necting board PC2, and control board PC1.
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Remedy
OM-492 Page 37