Miller Electric MPi 220P, Owner'S Manual

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OM-253 918 Page 42
SECTION 6 − MAINTENANCE & TROUBLESHOOTING
6-1. Routine Maintenance
! Disconnect power
before maintaining.
.
Maintain more often
during severe conditions.
n = Check Z = Change ~ = Clean l = Replace
* To be done by Factory Authorized Service Agent
Reference
Every
3
Months
l Unreadable Labels ~ Weld Terminals nl Weld Cables
Every
6
Months
OR
~ Inside Unit n Apply Light Coat Of Oil
Or Grease To Drive Motor
Shaft
~ Clean Drive Rolls
6-2. Welding Gun And Wire Drive Assembly
956142881_3-A
1 Welding Gun
Check gun liner for blockage or
kinks.
2
Wire Drive Assembly
Check for jammed wire, binding
drive gear or misaligned drive rolls.
Allow cooling period. Close door.
1
2
6-3. Unit Overload
Thermal switches TP1 and TP2 located on the primary and secondary heatsink protect the unit from damage due to
overheating. If TP1 and/or TP2 have opened due to overheating, 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.