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The following operations must be performed by qualified
electricians with valid certifications. Before maintenance, please
contact with us for professional suggestion.
Problem
Solution
1.
Meter doesn’t
display, fan
doesn’t work, no
welding output.
1.1 Make sure power switch is OFF.
1.2 Make sure the power source connecting
to input cable is working alright.
1.3 Make sure the input voltage is 3 phase.
2.
Meter is normal,
fan is working, no
welding output.
2.1 Check if connector of output terminal is
broken or damaged.
2.2 Check if the control board is damaged
(contact with the dealer or manufacturer).
3.
QC indicator is
ON, fan is
working, meter is
normal.
3.1 IGBT is damaged.
3.2 Rectifier of quick recovery is damaged.
3.3 Control board is broken.
3.4 The feedback circuit is in fault.
4.
Too much spatter 4.1 Output terminal polarity connection is
wrong. So please change the polarity
5.
Erratic welding
output current or
out of control of
potentiometer.
5.1 The potentiometer is damaged.
5.2 Check that all kinds of connectors are in
poor contact, especially plugs.
6.
Power switch
doesn’t work
6.1 Power switch is broken.
6.2 Three phase rectifier bridge is broken,
replace it.
6.3 Check if there is any short circuit of
inner-machine.
TROUBLESHOOTING
MMA WELDING MACHINES
Summary of Contents for IBL M200-77
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