Section 6 − Maintenance &Troubleshooting; Routine Maintenance; Overload Protection; Drive Motor Protection And Tip Saver/Short Circuit Protection - Miller MILLERMATIC 135 Owner's Manual

SECTION 6 − MAINTENANCE &TROUBLESHOOTING

6-1. Routine Maintenance

3 Months
Replace
unreadable
labels.
6 Months
Blow out or
vacuum inside.
During heavy
service, clean
monthly.

6-2. Overload Protection

6-3. Drive Motor Protection And Tip Saver/Short Circuit Protection

A. Drive Motor Protection
Drive motor protection circuit protects drive motor from overload. If drive motor becomes inoperative, release gun
trigger and wait until protection circuit resets allowing drive motor to feed wire again.
B. Tip Saver/Short Circuit Protection
The tip saver/short circuit protection extends contact tip life and protects internal components from damage. If contact
tip is shorted to workpiece, the unit shuts down the welding output, but the fan continues to run. To resume operation,
release gun trigger to reset unit. If the contact tip has stuck to the workpiece, release gun trigger, turn off unit, and
remove contact tip from workpiece. Check contact tip and replace if damaged. Turn on unit to continue operation.
OM-1324 Page 24
Y Disconnect power before maintaining.
Repair or
replace
cracked
weld cable.
Or
1
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Clean and
tighten weld
terminals.
1 Circuit Breaker CB1
CB1 protects unit from overload. If
CB1 opens, unit shuts down.
Reset breaker.
802 441