10
TROUBLESHOOTING
FC-90
MAINTENANCE
ELECTRIC SHOCK can kill.
•
Turn the input power OFF at the welding
power source before installation or
changing drive rolls and/or guides.
•
Do not touch electrically live parts.
•
When inching with the gun trigger, electrode and drive
mechanism are "hot" to work and ground and could
remain energized several seconds after the gun trigger
is released.
•
Do not operate with covers, panels or guards removed
or open.
•
Only qualified personnel should perform maintenance
work.
items requirinG nO maintenance
• Drive Motor and Gearbox – Lifetime lubrication
• Wire Reel Spindle – Do NOT lubricate shaft
rOutine and PeriOdic maintenance
•
BEFORE EACH USE -
Check over machine and
accessories for any obvious condition that may prevent safe
performance or operation. Repair or replace items as
necessary to correct any abnormal condition.
after 5 minutes Of WeldinG Or WHen sPatter
accumulates On tHe cOntact tiP:
•
CLEANING TIP AND NOZZLE -
With the power
switch in the off position, keep the contact tip and nozzle
clean to avoid arc bridging between them. Bridging can
result in a shorted nozzle, poor welds and an overheated gun.
Hint: Anti-stick spray or gel, available from a welding
supplier, may reduce buildup and aid in spatter removal.
TROUBLESHOOTING
HOW tO use trOublesHOOtinG Guide
Service and Repair should only be performed by Lincoln
Electric Factory Trained Personnel. Unauthorized repairs
performed on this equipment may result in danger to the
technician and machine operator and will invalidate your
factory warranty. For your safety and to avoid Electrical
Shock, please observe all safety notes and precautions
detailed throughout this manual.
This Troubleshooting Guide is provided to help you locate and
repair possible machine malfunctions. Simply follow the three-
step procedure listed below.
Step 1. LOCATE PROBLEM (SYMPTOM).
Look under the column labeled “PROBLEM (SYMPTOMS).” This
column describes possible symptoms that the machine may
exhibit. Find the listing that best describes the symptom that the
machine is exhibiting.
Step 2. POSSIBLE CAUSE.
The second column labeled “POSSIBLE CAUSE” lists the obvious
external possibilities that may contribute to the machine symptom.
Step 3. RECOMMENDED COURSE OF ACTION
This column provides a course of action for the Possible Cause,
generally it states to contact you local Lincoln Authorized Field
Service Facility.
If you do not understand or are unable to perform the
Recommended Course of Action safely, contact your local
Lincoln Authorized Field Service Facility.
E
ELECTRIC SHOCK can kill.
•
Turn off machine at the disconnect switch
on the rear of the machine and remove
main power supply connections before
doing any troubleshooting.
WARNING
WARNING
WARNING
