34 Chapter V Troubleshooting
Full-Digital Control CO
2
/MAG/MIG Multi-FunctionWelding Machine
Fault Type
Fault Code
Fault Description and Reason Solutions
Left
Nixie
Right
Nixie
Overcurrent is too high.
2. Output diode module is damaged.
nozzles and the contact tip is inadhesion, and if
the welding wire is stick to work-piece and occur
close short).
2. After inspection, press the welding torch , can
go back to work.
3. Check whether the output diode module is
Communication
E7 1 Internal communication failure.
Check whether the terminals on the display panel
and main control board are loosed.
Output
Overvoltage
E8
The output voltage is too high.
Main transformerdamage.
Wrong output connection.
1. Check if there are other machines connecting
voltage to the output terminals.
2. Check whether the main transformer is
damaged.
3. Check the output connection.
PrimarySide
Over-Current
E9 11
Main transformer damage.
Output diode module damage.
Main power board damaged.
1. Check the main transformer;
2. Check the output diode module;
3. Check the main power board; the welder can
be restored after the inspection.
E9 12
E9 2
The Current
Hall is not
Inserted.
E11 Current hall connector is not inserted. Check the current hall connector.
Wire Feeder
E13 Overcurrent of wire feed motor
Check whether the welding wire is blocked or
Fan Failure E15 Short circuit or open circuit of fan.
Check whether the fan is jammed or in short
circuit.
Encoder Failure
（
DexPM3000）
E17
The signal terminals of the code disc
are not firmly connected.
Check whether the signal terminal of the code
disc is firmly connected.
Heating Valve
Failure
E30 Heating Valve Overcurrent
Check whether the heating valve socket is short
circuit.
Motor Power
E33
The power cord of the motor is
Check whether the motor power cord is reversely
Attention
The fault type with the * is only for the model machine in parentheses.
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