32
MMS 2000P
MMS 2400
MMS 3000
EN
8.
TROUBLESHOOTING
Mechanical defects are mostly the result of irregular wire feeding or its blocking.
Electrical defects cause partial or full device failure. Only an authorized electrician can repair
the electrical part of welding device.
The troubleshooting should be executed in the OFF mode first and in the following sequence:
Check up the solidity of electrical connections on switches, current transformer, suppressor
and also the solidity of plugged and soldered connections.
Check up the conductivity and fuse contacts.
Check up visually possible short circuits or winding overload (coloration).
Possible malfunction
Troubleshooting
Possible reason
Electric arc is irregular or unstable
1. wrong welding voltage setup
adjust the voltage
2. too much/little wire
adjust the wire feed regulator
3. The workpiece clamp is loose
make a good contact between workpiece
or transfer resistance is too high (rust,
and clamp
paint)
4. The contact nozzle is worn up or
change it
the diameter is wrong
5. The gas flow is not correct
adjust the gas flow
6. The workpiece is not clear in the welding remove paint, rust, fat etc.
area
7. Performance grade malfunction
take the device to service
8. Plug-in spiral is dirty
clean it up or change it
9. Feeding malfunction
see thereinafter
Too much metal drops during welding
1. too much wire
adjust the wire feed regulator
2. welding voltage is too high
set up lower voltage
3. workpiece is dirty
clean it up
Feeding engine is not rotating
1. Power malfunction
check up the connection to the socket
2. Button on the torch was not pressed
press the button
3. Fuse
change it (must be changed by authorized
electrician)
4. Engine malfunction
take the device to service
Wire feeding malfunction
