Проверил: Р.Ч./24.03.2015г
13
Fan is working and
abnormal indicator is lit,
but there is no welding
out put.
After abnormal indicator is not on, open machine.
B- Maybe overheated protection is working, wait for 2-3minutes.
C- Maybe inverter circuit is in fault; please pull up the power plug of main
transformer(near VH-07 fan), which is on MOS board, then open the machine
again.
1) If abnormal indicator is still lit, some of MOS board is damaged, check and
replace it.
2) If abnormal indicator is not lit;
i) Maybe transformer of middle board is damaged, measure primary
inductance bridge.
ii) Maybe secondary rectifier tube of transformer is broken, check and replace
recifier tube.
D- Maybe feedback circuit is in fault.
QUESTIONS TO BE RUN INTO DURING WELDING
Fittings, welding materials, environment factor, supply powers maybe have something to do with
welding.
A
- Output current not to rated value:
When power voltage departs from the rated value, it will make the output current not matched with
rated value; When voltage is lower than rated value, the max output may lower than rated value.
B- Current is not stabilizing when machine is being operated:
It has something with factors as following:
1. Electric wire net voltage has been changed.
2. There is harmful interference from electric wire net or other equipment.
C
- When use MMA welding, too much spatter
Maybe current is too big and stick’s diameter is too small.
Output terminal polarity connection is wrong, it should apply the opposite polarity at the normal
technics, which means that the stick should be connected with the negative polarity of power source
and work piece should be connected with the positive polarity. So please change the polarity.
ENVIRONMENT
5)
The machine can perform in environment where conditions are dry.
6)
Ambient temperature is between 10 to 40 degrees centigrade.
7)
Avoid welding in sunshine or drippings.
8)
Do not use the machine in environment where condition is polluted with conductive dust on
the air or corrosiveness gas on the air.
OPERATION
3-
Open the power switch, screen will show set current volume and ventilator is beginning to
revolve.
4-
Generally, welding current is adequate to welding electrode according with as following:
SPECIFICATION : Φ 2,5 3,2 4,0 5,0
