Technical data
- 54 - 10.13
16 Repair and maintenance
Please heed the current safety
and accident prevention regu-
lations during all maintenance
and repair work.
16.1 Check regularly
Check the following points for damage
before starting up the welding machine:
– Mains plug and cable
– Welding torch and connections
– Ground cable and connection
Blow out the welding machine every two
months.
 Switch the machine off
 Disconnect the mains plug
 Unscrew both side panels of the unit
 Blow out the welding machine with dry,
low pressure compressed air. Avoid blow-
ing directly on the electronic components
from a short distance, to prevent damage
 Screw the two side panels onto the ma-
chine back again
Never make repairs or technical
changes yourself.
In this case the manufacturer’s
warranty is no longer valid.
If you experience problems or
need repairs, contact a dealer au-
thorised by Lorch.
16.2 Torch care
 Remove the weld spatter from inside the
gas nozzle using suitable tongs.
 Spray the inside surface of the gas noz-
zle with a releasing agent, or use nozzle
protection paste.
9 This will prevent weld spatter from being
burnt on.
Technical data
1
M 150 CuSi
BasicPlus
M 150 CuSi
ControlPro
M 170
BasicPlus
2
M 200 CuSi
ControlPro
M 210
BasicPlus
2
M 210
ControlPro
2
M 250
BasicPlus
M 250
ControlPro
M 300
BasicPlus
M 300
ControlPro
Welding
Welding range (I
2min
..I
2max
)
A 15..150 25..170 15..200 25..210 30..250 30..300
Welding range (U
2min
..U
2max
)
V 14,8..
21,5
15,3..
22,5
14,8..
24,0
15,3..
24,5
15,5..
26,5
15,5..
29,0
No-load voltage
V 14,4..
26,9
16,7..
38,0
14,4..
32,5
14,5..
40,3
16,3..
35,1
16,3..
40,2
Voltage setting
steps
7 6 12 12 12 12
Slope characteristic constant voltage characteristic line
ED 100 %
A 100 70 100 75 150 170
ED 60 %
A 120 85 130 90 185 205
17 Technical data