Troubleshooting; Routine Maintenance - Miller Maxstar 150 STH Auto-Line Manual Del Operador

SECTION 5 − MAINTENANCE AND TROUBLESHOOTING

5-1. Routine Maintenance

3 Months
Replace
unreadable
labels.
6 Months
Y Do not remove case when blowing out inside of unit .
Blow out inside. Direct airflow through front and back louvers.

5-2. Troubleshooting

Trouble
No weld output; unit completely inop- No weld output; unit completely inop-
erative; ready light (LED) Off. erative; ready light (LED) Off.
No weld output; ready light (LED) On.
No weld output; high temperature light No weld output; high temperature light
(LED) On. (LED) On.
No weld output; high temperature light
(LED) Flashing.
No weld output. Blue light (LED) flashes
continuously, yellow light (LED) off. continuously, yellow light (LED) off.
No weld output. Blue light (LED) flashes
3 times repeatedly, yellow light (LED) off.
Erratic or improper welding arc or out- Erratic or improper welding arc or out-
put. put.
Fan not operating.
Stick welding problems: Hard starts;
poor welding characteristics; unusual poor welding characteristics; unusual
spattering.
TIG welding problems: Wandering arc;
hard starts; poor welding characteris- hard starts; poor welding characteris-
tics; spattering problems.
TIG welding problems: Tungsten elec- TIG welding problems: Tungsten elec-
trode oxidizing and not remaining bright trode oxidizing and not remaining bright
after welding. after welding.
OM-2242 Page 14
Y Disconnect power before maintaining.
.
Maintain more often during severe conditions.
Replace Damaged
Gas Hoses
Place line disconnect switch in On position.
Check and replace line fuse(s), if necessary, or reset circuit breaker.
Be sure power cord is plugged in and that receptacle is receiving input power.
Check and secure loose weld cable(s) into receptacle(s).
Check and correct poor connection of work clamp to workpiece.
Unit overheated causing thermal shutdown. Allow unit to cool with fan On (see Section 3-2).
Reduce duty cycle or amperage.
Check and correct blocked/poor airflow to unit (see Section 3-4).
Turn Power Off and back On again. If light continues to flash, check with Factory Authorized Service
Agent.
Line voltage too high or too low. Line voltage must be within
Unit needs to rest. Cycle power off and back on. If problem is not corrected, contact Factory Authorized
Service Agent.
Remote trigger left on. Turn off remote trigger, wait 5 seconds, and restart operation.
Use proper size and type of weld cable (see your Distributor).
Clean and tighten weld connections.
Check and reverse polarity; check and correct poor connections to workpiece.
Unit not warmed up enough to require fan cooling.
Check for and remove anything blocking fan movement.
Have Factory Authorized Service Agent check fan motor and control circuitry.
Use proper type and size of electrode.
Check and reverse electrode polarity; check and correct poor connections.
Make sure a remote control is not connected.
Use proper type and size of tungsten.
Use properly prepared tungsten.
Check and reverse electrode polarity.
Shield weld zone from drafts.
Check for correct type shielding gas.
Check and tighten gas fittings.
Check and change electrode polarity.
Repair Or Replace
Cracked Cables
And Cords
Remedy
±
10%.