Miller Electric 280 NT - Manual (Page 40)

OM-4402 Page 36
SECTION 9 − TROUBLESHOOTING
9-1. Welding Troubleshooting
Trouble Remedy
No weld output. Check control settings.
Check weld connections.
Disconnect equipment from auxiliary power receptacles during start-up.
Place Output (Contactor) switch in On position, or move switch to Remote 14 position and connect
remote contactor to Remote 14 receptacle RC1 (see Sections 4-9 and 5-1).
Check fuses F1 and F2, and replace if necessary (see Section 7-7 or 8-7).
Have Factory Authorized Service Agent check brushes, slip rings, and field current control board PC2.
Low weld output. Check control settings.
Place Remote Amperage/Voltage switch in Panel position, or move switch to Remote 14 position and
connect remote amperage/voltage control to Remote 14 receptacle RC1.
Check and clean air cleaner as necessary (see Section 7-3 or 8-3).
Check and adjust engine speed (see Section 7-6 or 8-6).
Have Factory Authorized Service Agent check brushes, slip rings, and field current control board PC2.
See engine manual.
High weld output. Check control settings.
Check and adjust engine speed (see Section 7-6 or 8-6).
Check for obstructed movement of solenoid linkage (see Section 7-6 or 8-6).
Have Factory Authorized Service Agent check field current control board PC2.
Weld output cannot be adjusted. Check position of Remote Amperage/Voltage switch (see Section 5-1).
Have Factory Authorized Service Agent check field current control board PC2.
Erratic weld output. 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 and adjust engine speed (see Section 7-6 or 8-6).
Have Factory Authorized Service Agent check brushes, slip rings, and field current control board PC2.
Remote contactor control does not
activate contactor.
Place Output (Contactor) switch in Remote 14 position (see Section 5-1).
Check and tighten connections to Remote 14 receptacle RC1 (see Section 4-9).
No power output at Remote 14
receptacle RC1.
Reset circuit breaker CB1 and/or CB2 (see Section 7-7 or 8-7).