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8 Trouble Shooting
IMPORTANT: Only authorised repair agents with valid certifications should carry out
repairs and internal servicing.
Faults symptom
1 Fan is not working
2 No welding current
output
1 Fan works normally;
2 No welding output
1 Fan is not working
2 It has abnormal
indication
1 Fan is working, it has
abnormal indication
2 No welding current
output
1 Power switch doesn't
work
Reasons
1 Power switch is broken.
2 The silicon bridge is
damaged.
3 There is malfunction
occurs
in the supplementary
power source on control
board.
1 There is open circuit or
badness of
connection
the joint of output terminal.
2 The control cable on the
torch is broken off or the
switch is damaged.
3 The control circuit is
damaged.
1 The fan is broken.
2 Internal fault.
1 Overheat protection.
2 The circuit of
auxiliary
power supply is broken.
1 Power switch is broken.
2 Three phase rectifier
bridge is broken.
Solutions
1 Replace the power switch
2 Replace the silicon bridge.
3 If problem persists, please
that
contact a service agent.
1 Check if all the sockets in the
at
machine are connected well.
2 Replace the torch.
3 If problem persists, please
contact a service agent.
1 Replace the fan.
2 If problem persists, please
contact a service agent.
1 The machine will automatically
return to normal in 5–10 minutes.
2 If problem persists, please
contact a service agent.
1 Replace the power switch.
2 Replace the three phase rectifier
bridge.
3 Check if there is any short circuit
of
inner
machine.
15
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