- 16 -
№
TROUBLE
CAUSES
WHAT TO DO
01
Indicator lamp does not light
on when machine switches
on.
(1)Phase missing
(2)Circuit breaker is damaged
(3)Fuse is broken
(1)Check power supply
(2)Replace
(3)Replace
02
Circuit breaker trips
immediately after the
machine is switched on.
(1)Circuit breaker is collapsed.
(2)IGBT module is damaged
(3)3-phase rectifier bridge is
damaged.
(4)Varistor is damaged
(5)Welder’s control board is
damaged
(1)Replace
(2)Replace IGBT module
and drive board
(3) Replace
(4) Replace
(5)Replace main control
board
03
Circuit breaker trips while in
welding
(1)Welding machine operates
in long term overload
(2)Circuit breaker is damaged
(1)Operating machine in
rated duty cycle
(2) Replace
04
Welding current can not be
adjusted
(1)Wire feeder’s control cable
is broken or controller is
damaged
(2)Control board is damaged
(3)Conductive wire connected
the rectifier is broken
(1)Change control cable or
controller
(2)Replace
(3)Reconnect the broken
wires
05
Instable arc welding, more
spatter
(1)Incorrect welding
parameters
(2)Contact tip is worn out
severely
(1)Fine tune parameters
(2)Replace
06 CO
2
gas regulator can’t heat
(1)CO
2
regulator is damaged
(2)Heater cable is broken or
shorten
(3)Thermistor in power source
is damaged
(1) Replace
(2) Check and repair
(3) Replace
07
Push welding torch switch,
wire feeding is normal but
airflow is blocked
(1)Control board is damaged
(2)Electromagnet
valve
is
damaged
(1)Replace
(2)Replace
08
Push welding torch switch,
wire feeder do not work and
there is no open load volt
display
(1)Torch switch is damaged
(2)Feeder’s control cable is
broken
(3)Control board is damaged
(1)Replace welding torch
(2)Repair control cable
(3)Replace main control
board
Table 6: Troubleshooting Table
