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ANDELI MCT-520DPL にも: オーナーズマニュアル (8 ページ)

ANDELI MCT-520DPL オーナーズマニュアル
Abnormal indicator light is on, no
output
Can not break the oxide film when
welding aluminum
Tungsten needle burnt seriously
1. It may be overcurrent protection. Please turn off the machine. When
the abnormal indicator light is off and then restarted, it can be restored.
2. may be overheat protection, do not need to shut down for 2-3
minutes, the machine can naturally return to normal.
3. It may be that the inverter circuit is faulty. Please unplug the power
supply plug of the main transformer on the MOS board (near the fan
VH-07 plug-in) and restart it:
(1) If the abnormality indicator is still on, turn off the power plug of the
high-frequency pilot arc power supply (near the fan VH-03 plug-in) and
turn it back on:
a. If the abnormal indicator is still on, the individual FETs on the MOS
board are damaged.
b. If the abnormal indicator is not lit, the step-up transformer in the
high-frequency arc-rising circuit on the power supply board is broken
and replaced.
(2) If the abnormal indicator does not light:
a. It may be damaged in the middle plate transformer. The primary
inductance and Q value of the main transformer can be measured by
the bridge.
b. It may be that the transformer secondary rectifier is individually
broken down, and the same type of rectifier is found and replaced.
4. It may be that the feedback circuit is open.
1. The welding gear selection is incorrect;
2. The duty cycle adjustment is too small;
3. The secondary inverter has field tube damage.
The duty cycle is adjusted too much to reduce the duty cycle.
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