Riland TIG 315PAC/DC, Руководство пользователя

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21
Abnormal indicator is lit and
there
is no welding output .
1. Maybe it is overheated protection, please close machine first, then
open the machine again after abnormal indicator is not lit
2. Maybe it is overheated protection, wait for 2-3 minutes (argon-arc
welding does not has overheated protection function)
3. Maybe inverter circuit is in fault, please pull up the supply power plug
(VH-07 insert which is near the fan) near the transformer which is
on MOS board then open the machine again
(1) If abnormal indicator is still lit ,close machine and pull up supply
power plug of HF arc-striking power source (which is near the
VH-07 insert of fan ), then open machine
a. If abnormal indicator is still lit, some of MOSFET of MOS
board is damaged, find out and replace it with same model
b. If abnormal indicator is not lit, up-slope transformer of HF arc-
striking circuit is damaged, replace it
(2) If abnormal indicator is not lit
a. Maybe transformer of middle board is damage, measure
inductance volume and Q volume of main transformer by
inductance bridge
b. Maybe secondary rectifier tube of transformer is damaged,
find out and replace rectifier tube with same model
4. Maybe feedback circuit is broken
Stick is burnt out Pulse duty is too high, reduce it
When welding aluminum, can
not break oxidized film
1. Wrong welding value
2. Pulse duty too low
3. Twice inverter MOSFET broken