12-TROUBLE SHOOTING
Warning! An electric shock can be fatal. Before opening the machine:
-Switch it off and unplug it from the mains
-Unplug machine from the mains
-Put up a clearly legible and easy-to-understand warning sign to stop anybody inadvertently switching it back on
again
-Check to make sure the electrically charged components (e.g.capacitors) have been discharged.
-Bolt in outer case also works for ground connection. Never use other bolt, which can not work for ground
connection.
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Note! The following troubles and causes are uncertain. However, during the normal welding, that might happen.
No. Problem Cause Remedy
01
After power on, it
doesn’t work
1)Phase missing
2)Fuse (2A) in welding machine is
broken
Cable is broken3)
1)Check power source
2)Check if the fan, power transformer
and main control board is damaged
3)Check connection
02
Circuit breaker on
rear panel trips while
the machine is
working normally
1)The following components may be
damaged: IGBT module, 3-phase rectify
module, output diode module, or other
components
2)Drive board is damaged
3)Short circuit of the cable
1)Check and replace
2)When IGBT Module is damaged,
please check 12Ω, 5.1Ω resistance or
SR160 on drive board is damaged or not
3)Check and repair
03
Welding current is
unstable
1)Phase missing
2)The following components may be
damaged: potentiometers, switches on
front panel and remote control cable,
potentiometer on remote controller
3)Main control board is damaged
1)Check power source
2)Check and replace
3)Check and replace
04
Welding current is
not adjustable
1)Welding current adjustment knob is
damaged
2)Remote control cable is broken
3)Main control board is damaged
4)The switch on the front panel is
damaged
Check and replace
05
TIG welding is
abnormal
1)TIG torch trigger is damaged
2)Remote control cable is broken
3)The tungsten electrode in welding
machine is in the wrong position
4)Main control board is damaged
Check and replace
Table 12-1: Trouble shooting
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