Troubleshooting - Miller Electric XMC 4000 Owner's Manual

5-4. Troubleshooting

Trouble
No weld output: unit completely inopera-
tive. tive
No weld output; meter display On.
Erratic or improper weld output.
Wire feeder does not work.
Coolant system not working (HELP 15
is displayed). is displayed)
Reduced or no coolant flow from cool-
ing unit (HELP 15 can be displayed). ing unit (HELP 15 can be displayed)
Control panel not functioning properly.
Software problems. Software problems
OM-221 694 Page 30
Place line disconnect switch in On position (see Section 3-9).
Check and replace line fuse(s), if necessary, or reset circuit breaker (see Section 3-9).
Check for proper input power connections (see Section 3-9).
Verify welding parameter settings.
Verify Help messages and correction procedures as necessary.
Check, repair, or replace remote control.
Unit overheated. Allow fan to run and unit cool (see Section 3-2).
Use proper size and type of weld cable (see Section 3-5).
Clean and tighten all weld connections.
Reset circuit breaker CB10 (see Section 5-3).
Check and clear any restrictions at drive assembly and liner.
Secure gun plug in receptacle or repair leads, or replace trigger switch.
Check and secure coolant hose connectors.
Reset circuit breaker CB7 (see Section 5-3).
Motor overheated. Allow motor to cool and restart operation.
Have Factory Authorized Service Agent check cooling unit.
Add coolant.
Check for blockage at hoses.
Disconnect pump, and check for sheared coupling. Replace coupling if necessary.
Switch unit off and back on again to verify LED's and display status.
Reinstall factory parameters (see Section 4-2).
Contact a Factory Authorized Service Agent.
Remedy