4. troubleshooting – Miller Electric XMC 4000 User Manual
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OM-221 694 Page 30
5-4. Troubleshooting
Trouble
Remedy
No weld output: unit completely inopera-
tive
Place line disconnect switch in On position (see Section 3-9).
tive.
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).
No weld output; meter display On.
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).
Erratic or improper weld output.
Use proper size and type of weld cable (see Section 3-5).
Clean and tighten all weld connections.
Wire feeder does not work.
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.
Coolant system not working (HELP 15
is displayed)
Check and secure coolant hose connectors.
is displayed).
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.
Reduced or no coolant flow from cool-
ing unit (HELP 15 can be displayed)
Add coolant.
ing unit (HELP 15 can be displayed).
Check for blockage at hoses.
Disconnect pump, and check for sheared coupling. Replace coupling if necessary.
Control panel not functioning properly.
Software problems
Switch unit off and back on again to verify LED’s and display status.
Software problems.
Reinstall factory parameters (see Section 4-2).
Contact a Factory Authorized Service Agent.