GYS PROGYS 250 A TRI Manual página 15

Recommended combinations / Electrode grinding
0.3 - 3 mm
2.4 - 6 mm
4 - 8 mm
6.8 - 10 mm
To optimize the working, you have to use an electrode grinded as below:
L = 2,5 x d.
TROUBLESHOOTING
Anomalies
The device does not deliver any
current and the yellow indicator
lamp of thermal defect (6) lights
up.
The display is on but the device
does not deliver any current.
If, when the unit is on and you put
your hand on the welding unit's
body, you feel tingling sensation.
The display is on but the device
does not deliver any current.
When starting up,
the display indicates
Instable arc
The tungsten electrode gets
oxidised and tern at the end of
welding.
The electrode melts
250 A TRI
Ø Electrode (mm)
Current (A)
(filler metal)
15 - 75
60 - 150
100 - 200
170 - 250
d
Causes
The welder thermal protection has
The cable of the earth clamp or
electrode holder is not connected
The welding unit is not correctly
connected to the earth.
The cable of the earth clamp or
electrode holder is not connected
The voltage is not included in the
. range 400V +/- 15%
Default coming from the tungsten
Too important gas flow rate
Default coming from post-gas or
the gas has been stopped prema-
= Ø wire Ø Nozzle (mm)
1
1.6
2
2.4
L
turned on.
to the welder.
to the welder.
electrode
Welding zone
turely.
Polarity error
Flow rate
(Argon L/mn)
6.5 6 - 7
8 6 - 7
9.5 7 - 8
11 8 - 9
Remedies
Wait for the end of the cooling
time, around 2 minutes. The indi-
cator lamp (6) turns off.
Check the connections.
Check the plug and the earth of
your electrical network.
Check the connections.
Have the electrical installation
checked.
Use a tungsten electrode with the
adequate size
Use a well prepared tungsten
electrode
Reduce gas flow rate
Protect welding zone against air
flows
Check and tighten all gas connec-
tions. Wait until the electrode cools
down before stopping the gas.
Check that the earth clamp is
really connected to +
EN
15