Miller Dialarc 250 AC/DC Manuel Du Propriétaire page 21

SECTION 5 − MAINTENANCE & TROUBLESHOOTING
5-1. Routine Maintenance
5-2. Troubleshooting
Trouble
No weld output.
Erratic or improper weld output.
Fan motor FM does not run.
Low weld output.
Low weld output; Amperage Adjustment control does
not control weld output.
3 Months
Replace
Unreadable
Labels
3 Months
Clean
And
Tighten
Weld
Terminals
Place Power switch in the On position (see Section 4-1).
Place line disconnect switch in the On position (see Section 3-10).
Check line fuse(s); replace if open or reset circuit breaker(s) (see Section 3-10).
Check for proper input connections (see Section 3-10).
Check for proper jumper link position (see Section 3-9).
Use proper size and type weld cable (see Section 3-6).
Clean and tighten all weld connections (see Section 5-1).
Be sure electrode is dry and proper type for SMAW.
Check connections at input terminal board TE1 (see Section 3-9).
Check line fuse(s); replace if open or reset circuit breaker(s) (see Section 3-9).
Check and clear blocked fan blade.
Have Factory Authorized Service Agent check fan motor.
Check for proper input connections (see Section 3-10).
Check for proper jumper link positions (see Section 3-9).
Use proper size and type weld cable (see Section 3-6).
Clean and tighten all weld connections (see Section 5-1).
Reset control circuit overload breaker CB1 (see Section 4-1).
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Y Disconnect power
before maintaining.
6 Months
OR
Remedy
.
Maintain more often
during severe conditions.
Repair Or
Replace
Cracked
Weld
Cable
Blow Out
During Heavy
Or
Service,
Vacuum
Clean Monthly
Inside
OM-321 Page 17