Miller Regency 250 - Routine Maintenance; Troubleshooting

OM-293 Page 15
SECTION 4 − MAINTENANCE & TROUBLESHOOTING
4-1. Routine Maintenance
Y Disconnect power before maintaining.
3 Months
Replace
Unreadable
Labels
Repair Or
Replace
Cracked
Weld
Cable
Clean
And
Tighten Weld
Connections
6 Months
Blow Out
Or
Vacuum
Inside
During Heavy
Service,
Clean Monthly
OR
4-2. Troubleshooting
Trouble Remedy
No weld output; unit completely inoperative; pilot light
not on.
Place Power switch in the On position (see Section 3-1).
Place line disconnect switch in the On position (see Section 2-9).
Check line fuse(s); replace if open or reset circuit breaker(s) (see Section 2-9).
Check for proper input connections (see Section 2-9).
Erratic weld output. Use proper size and type weld cable (see Section 2-6).
Clean and tighten all weld connections (see Section 4-1).
Check for proper input connections (see Section 2-9).
No open-circuit voltage; pilot light on; wire does not
feed.
Secure gun trigger connections or see gun Owner’s Manual.
Secure plug in Remote 14 receptacle RC3 (see Section 2-7).
No open-circuit voltage; pilot light on; wire feeds. Secure Voltage Range Selector plug in receptacle (see Section 3-1).
Thermostat open (overheating). Allow unit to cool.
Have Factory Authorized Service Agent check contactor W.
Open-circuit voltage normal; pilot light on; wire does
not feed.
Check gun or wire feeder Owner’s Manual.
No 115 volts ac output at Remote 14 receptacle RC3. Reset circuit breaker CB1 (see Section 3-1).
No 24 volts ac output at Remote 14 receptacle RC3. Reset circuit breaker CB2 (see Section 3-1).