25
Table6-2: Trouble shooting
7-CARE AND MAINTENANCE
Before open the machine
Warning!
An electric shock can be fatal. Before doing any work on the machine:
-
Switch it off and unplug it from the mains
-
Put up a clearly legible and easy-to-understand warning sign to stop anybody inadvertently switching it on
again.
-
Check to make sure the electrically charged components (e.g.capacitors) have been discharged.
-
Bolts in machine case also work for ground connection. Never use other bolt that cannot work for ground
connection.
Maintenance
Please follow the instructions as below to ensure normal lifespan of power source.
-
Conduct safety check at regular intervals (see “Safety rules”)
-
Dismantle machine side panels and clean machine inside with clean and low-pressure compressed air by
professional technician, not less than twice per year. Clean the components at a certain distance only;
-
If a lot of dust has accumulated, clean the cooling-air ducts.
04
Welding current is not
adjustable
1)
Wire feeder control cable is broken or
controller is damaged
2)
Control board is damaged
3)
Current sensor in welding machine is
damaged or its cable is broken
1)
Replace
2)
Replace
3)
Replace
05
Arc is unstable, large
spatter
1)Improper welding standard
2)Contact tip is serious worn
1) Adjust properly
2) Replace
06
CO2 gas regulator does not
heat
1)
CO2 gas regulator fault
2)
Heating cable is broken or short circuit
3)
Thermistor of heating power source is
damaged
1) Replace
2) Repair
3) Replace
07
Press torch trigger, wire
feeding is normal, but no
gas comes out from torch
1) Control board is damaged
2) Solenoid valve is damaged
3) Control cable is broken
1) Replace
2) Replace
3) Re-connect
08
Press torch trigger, wire
feeder does not work, no
open circuit voltage
indication
1) Torch trigger is damaged
2) Wire feeder control cable is broken
3) Control board is damaged
1) Replace
2) Repair
3) Replace
Summary of Contents for MIG350MC
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