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MIG-160PI/MIG-180PI/MIG-200PI/MIG-250PI
- 10 -
CHECK FAULT
Notes: If user wants to operate machine as following, the operator must be a
personnel in a specific field of electricity and safety and hold the relevant
certificate that proves there ability and knowledge. Before maintenance, contact
with our for authorization is suggested.
Faults
Resolvable Method
Power indicator
is not lit, fan
does not work
and no welding
output
1
、
Make sure air switch is closed.
2
、
Check if electric wire net is in work.
3
、
Some of heat-variable resistors(four) of power panel is
Damaged, when it happen, general DC24v relay is open or
Connectors are poor contact.
4
、
Power panel(bottom board) is damaged, DC 310V voltage
Cannot be output.
(1)
Silicon bridge is broken or connector of silicon bridge
Poor contact.
(2) Power panel has been burned up.
(3) Check the wire from the power switch to input cable is poor
contact or not
5
、
Auxiliary power of control panel is in fault.
Power indicator
is lit, fan works,
no welding
output
1
、
Check if all kinds of cables of inter-machine are poor contact.
2
、
Output connector is cut off or poor contacted.
3
、
Control cable or switch of torch is broken.
4
、
Control circuit is broken.
Power indicator
is lit, fan works,
abnormal
indicator is lit.
1
、
Maybe it is overheated protection, please turn off machine first,
then turn on the machine again after abnormal indicator is off.
2
、
Maybe it is overheated protection, wait for 2-3 minutes.
3
、
Maybe inverter circuit is in fault:
(1) If abnormal indicator is still lit, some of IGBT is damaged on the
main board, find out and replace it with same model.
(2) If abnormal indicator is not lit,:
a.
Maybe transformer is damaged, measure inductance volume
and Q volume of main transformer by inductance bridge.
b.
Maybe secondary rectifier tube of transformer is damaged, find
out faults and replace rectifier tube with it.
If the machine fails to work normally after maintenance and check, please
contact us.We will do our best to support you the useful suggestions.