WELDPRO MIG155GD, Руководство оператора, Страница: 35 / 36

TROUBLESHOO
TING
TROUBLESHOOTING
Note
:
The following operations must be carried out by a qualified electrician with valid certifications. Before
maintenance, it is suggested you verify qualification.
Fault description
Measures to take
The power indicator light is off.
The fan is not on.
There is no welding output.
The power indicator light is on.
The fan works properly.
There is no welding output.
The power indicator light is on.
The fan works properly.
The fault indicator light is on.
1. Make sure that the power switch is turn on.
2. Check if the power network works well.
3. The heat variable resistors on the control panel is damaged.
When this happens, the 24VDC general relay is open or the
connectors are not connected properly.
4. The control panel is damaged. There is no 310VDC output.
(1) The silicone bridge is broken or the silicon bridge
connector is not connected properly.
(2) The power supply panel is burnt out.
(3) Check the connections of the cable connecting the power
switch with the control panel Check the connections of the
cable connecting the control panel with the main control
panel.
4. The main control panel's auxiliary power supply is damaged.
1. Check if all internal cables of the machine are well connected.
2. The output connector is disconnected.
3. The output connector is disconnected or not connected
properly.
4. The control circuit s damaged.
1. The overheat protection may be activated. Turn off the power
switch and restart the machine, once the fault indication light is
off.
2. The overheat protection may be activated. Wait 2-3 minutes.
3. There may be a malfunction in the inverter circuit.
WARNING
The power must be cut off completely before starting any kind of inspection.Otherwise you
may suffer serious accidents like electric shock or burns.
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