Arcoweld ArcoMiG LCD 250C - Page 33

MAINTENANCE &TROUBLESHOOTING
33
S/N
Troubles Reasons Solution
value.
The max value displayed isn’t accordant with
the actual value. (Please refer to §3.1)
Adjust potentiometer Imax on the power
board.
11
The penetration of molten pool
is not enough.
The welding current is adjusted too low
Increase the welding current
The arc is too long in the welding process
Use 2T operation
12
The alarm lamp
on the front
panel is on
Overheat protection
Two much welding
current
Reduce the welding current output
Working time too
long
Reduce the duty cycle (work
intermittently)
Over-voltage
protection
Power supply
fluctuates
Using the stable power supply
Low-voltage
protection
Power supply
fluctuates
Using the stable power supply
Too many machines
using power supply
in the same time
Reduce the machines using power
supply in the same time
Over-current
protection
Unusual current in
the main circuit
Check and repair the main circuit and
drive Pr6