16
Malfunction Phenomena
Cause and Solution
5. TROUBLESHOOTING
The abnormity indicator on the front panel would illuminate in case of any failures inside the
cutting machine.
Arc can not be ignited.
1
)
The MOSFET
(
or IGBT
)
on the top PCB is damaged.
(The drive module is damaged.)
The arc ignition part fails:
3
)
There is leakage of the HF capacitor 222/15KV.
4
)
The relay is damaged.
2
)
The air pressure is overly high or overly low.
Turn on the machine, the power
indicator illuminates, the fan does
not work, and the control button
does not function.
Overvoltage protection occurs
:
Shut down the machine,
and restart it after a few minutes.
Turn on the machine, the power
indicator illuminates and the fan
works. When pressing the control
button of the cutting torch, the
solenoid valve inside the machine
functions, but there is no HF
discharge rustling and the red LED
inside the machine is on.
2
)
The step-up transformer on the bottom PCB is damaged.
3
)
The control module is damaged.
Turn on the machine, the power
indicator illuminates and the fan
works. When pressing the control
button of the cutting torch, the
solenoid valve inside the machine
functions, but there is no HF
discharge rustling and the red LED
inside the machine is off.
1
)
There is electrode sticking inside the discharge nozzle
or the interelectrode distance of the discharge nozzle
is too long.
2
)
There is short circuit or bad contact in the primary
coil of the arc ignition transformer.
1
)
The input voltage is too low.
Summary of Contents for L20701
Page 1: ...T MODEL CUT40 L20701 CU 0 L208 OPERATOR S MANUAL 3 INVERTER CUTTER...
Page 2: ......
Page 23: ......
