Miller Electric OM-229 038D - Manual (Page 21)

OM-229 038 Page 17
SECTION 5 − MAINTENANCE &TROUBLESHOOTING
5-1. Routine Maintenance
Y Disconnect power
before maintaining.
.
Maintain more often
during severe conditions.
3 Months
Replace unreadable labels Repair or replace
cracked weld cable
Clean and tighten weld terminals
6 Months
Blow out or vacuum inside.
OR
Remove drive roll and
carrier. Apply light coat
of oil or grease to drive
motor shaft.
5-2. Circuit Breaker CB1
1 Circuit Breaker CB1
CB1 protects the unit from over-
loading of drive motor M1. If CB1
opens, wire feeding stops.
2 Welding Gun
Check gun liner for blockage or
kinks.
3 Wire Drive Assembly
Check for jammed wire, binding
drive gear or misaligned drive rolls.
Allow cooling period and reset
breaker. Close door.
2
221−253−4
1
3
5-3. Unit Overload
Thermal switches TP1 in XFMR and TP2 in SR1 protect the unit from damage due to overheating. If the thermal indica-
tor illuminates, wait for unit to cool allowing fan motor to run before trying to weld. If unit is cool and no weld output
continues, contact Factory Authorized Service Agent.