27
10.2 Troubleshooting table
failures
check points
The front panel light doesn’t on or the
cooling fan doesn’t work when
machine is power on.
The machine is not connected to the power supply
The fuse is damaged and the circuit electrons may be damaged.
he fuse on the distribution box is damaged.
There is no HF or arc start.
The MODE is selected as STICK.
Poor contact of the torch switch.
No gas flow.
No arc start occurs even there is HF.
Poor contact of the base metal.
The gap between electrode & base metal is too large.
No arc start occurs at the STICK
states,
The MODE is not STICK.
No gas flow.
The gas hose doesn’t connect with the machine
Serious gas hose banding.
。
Defective gas valve.
Continuous gas flow
The gas check states is selected as “CHECK”.
The post-flow time is too long
Defective gas valve.
Unstable
arc
or
bad
welding
performance
Poor connection of the input/output terminals.
Regarding to the dia. of the electrodes, the welding current is too
low.
。
Defective electrodes.
Regarding to the dia. of the sticks, the welding current is too low.
Arc breaking
The gap between electrode & base metal is too large.
High consumption of the electrodes.
Regarding to the dia. of the electrodes, the welding current is too
large.
The pre-flow/post flow time is too short.
no gas flow
The TIG torch is connected to the “+” side.
Summary of Contents for YC-400TX4
Page 2: ......
Page 17: ...11 5 2TIG PLUSE TIG WATER ...
Page 35: ...29 12 Parts list 12 1 Parts list for YC 400TX4 Front view 1 3 4 5 2 6 ...
Page 36: ...30 Right View Left view 7 12 11 13 19 20 10 8 9 21 14 15 18 16 17 23 22 26 24 27 25 ...
Page 38: ...32 13 Outline drawing ...
Page 39: ...33 14 Circuit diagram ...