Page 43
disassembly and assembly
The argon gas is impure
Replace with qualified argon gas
The gas flow is too large or small
Adjust the gas flow properly
Arc is started
between the
electrode holder
and tungsten
electrode or
welding torch
The collet and tungsten electrode
have poor contact, or arc is
started when the tungsten
electrode contacts the base metal
Replace the collect or repair
The collet and welding torch have
poor contact
Connect the collect and welding torch
properly
9. Troubleshooting
Warning! Before arc welding machines are dispatched from the factory, they
have already been checked thoroughly. The machine should not be tampered
with or altered. Maintenance must be carried out carefully. If any wire
becomes loose or is misplaced, it may be potentially dangerous to user! Only
professional maintenance personnel should repair the machine!
Ensure the power is disconnected before working on the machine. Always
wait 5 minutes after power switch off before removing the panels.
9.1. Common malfunction analysis and solution
The symptoms listed here may be related to the accessories, gas,
environmental factors, and power supply you use. Please try to improve the
environment and avoid such situations.
Elimination of general problems in MMA
Symptom
Reasons
Troubleshooting
After startup, the fan does
not turn or the wire feeding
speed is abnormal
The air temperature
may be too low or
the fan may be
damaged
When the temperature is too low, leave the
machine work for a while. The temperature
in standby will rise, then fan will resume
normal operation. If it is still not working, it is
necessary to replace the fan.
MMA
Hard to start the
arc
Arc hot start current
is low
Or the hot start time
is short
Increase arc start current or arc start time
Unstable arc or
excessive molten
pool during arc
start
Arc start current is
high
Or the arc start time
is long
Reduce arc start current or start time
appropriately
Cannot start
The power cord is
not connected
Connect the power cord