zika MIG 200G, Руководство пользователя

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OWNER’S MANUAL - 18 -
TROUBLESHOOTING AND FAULT FINDING
Notes: The following operations must be performed by qualified electricians with valid certifications. Before
maintenance,please contact with us for professional suggestion.
Fault symptom and solutions of MIG 200G:
Fault symptom Solutions
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 308V 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 contact and insert cable from air switch to power panel are poor
contact, check contact and insert cable from power panel to MOS board are
connected reliably.
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
3. Output connector is cut off or poor contacted.
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 restart the
machine after abnormal indicator is off.
2. Maybe it is overheated protection, wait for 2-3 minutes.
3. Maybe inverter circuit is in fault, please pull up the supply power plug of main
transformer which is on MOS board (VH-07 insert which is near the fan) then
restart the machine:
1
）
If abnormal indicator is still lit, some of MOSFET of MOS board are damaged,
find out and replace them with same model.
2
）
If abnormal indicator is not lit:
a. Maybe transformer of middle board is damaged, measure inductance
value and Q value of main transformer by inductance bridge. If value is
too low, please replace it.
b. Maybe secondary rectifier tube of transformer is damaged, find out faults
and replace rectifier tube with it.