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13. FAILURE AND MAINTENANCE
Safety warning
：
T
he following operation requires sufficient professional knowledge on electric
aspect and comprehensive safety knowledge. Operators should be holders of valid
qualification certificates which can prove their skills and knowledge. Make sure the input
cable of the machine is disconnected from the electricity utility before uncovering the
welding machine.
13.1. Common failure analysis and troubleshooting
Failure
Cause
Solution
Fan does not work or
digital meter does not
display after the machine
is turned on
Power
cord
is
not
well
connected;
Reconnect the power cord;
Without no-load voltage
output, abnormity indicator
flickers and digital meter
displays E-2
Over heating protection;
It can self recover after cooling the welder;
Without no-load voltage
output,
digital
meter
displays E-1
Power inverter fails or auxiliary
power supply is abnormal;
Disconnect the power cable after shutdown
and check auxiliary power board;
There is no response and
abnormity indicator is off
after
torch
trigger
is
pressed.
Torch is not well connected;
Torch trigger fails;
Reconnect the torch;
Repair or replace the torch;
There is gas output and
wire feeding after torch
trigger is pressed, but
there is no current output
and abnormity indicator is
off
Ground wire is not connected or
not
well
connected
to
workpiece;
Wire feeding motor assembly or
torch fails;
Reconnect the ground wire and workpiece;
Repair the wire feeding motor assembly or
torch;
There is gas output and
voltage output after torch
trigger is pressed, but
there is not wire feeding
Control wire of wire feeder is
broken;
；
Wire feeding motor assembly
is stuck;
Wire feeder fails;
Main control board of the welder
fails;
Replace or repair the control wire;
Unblock the wire feeding motor assembly;
Repair the wire feeder;
Replace the main control board;
