24
Important!
When use pressure device to adjust wire feed roll pressure, too much pressure will cause wire crushed, and
the wire coating be damaged, and it will cause the wearing out of feed rollers and increase the wire feeding resistance.
Suitable pressures for wires of different materials and diameters are as shown in Fig. 4-7-7.
Fig. 5-3: Wire feed rollers installation parameter
6-TROUBLE SHOOTING
Warning!
An electric shock can be fatal. Before doing any work on the machine:
-
Switch it off and unplug it from the mains
-
Put up a clearly legible and easy-to-understand warning sign to stop anybody inadvertently switching it on
Again.
-
Check to make sure the electrically charged components (e.g.capacitors) have been discharged.
-
Bolts in machine case also work for ground connection. Never use other bolt that can not work for ground
connection.
● Power source trouble shooting
Note!
The flowing troubles and causes are uncertain. However, during the process of MIG Pulse and the
normal using conditions, that might happen.
No.
Problem
Cause
Remedy
01
No display after power on
1)
Power supply phase loss
2)
Circuit breaker on rear board is damaged
3)
Fuse is broken
1)
Check power supply
2)
Replace
3)
Replace (2A)
02
Circuit
breaker
trips
immediately
after
the
machine is power on
1)
Circuit breaker fault
2)
IGBT module is damaged
3)
Three-phase rectifier bridge is damaged
4)
Varistor is damaged
1)
Replace
2)
Replace IGBT module
and drive board
3)
Replace
4)
Replace
03
Circuit breaker trips during
welding
1)
Machine long time overload working
2)
Circuit breaker is damaged
1)
Use as rated duty
cycle
2)
Replace
Summary of Contents for MIG350MC
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Page 27: ...26 Daily maintenance Fig 7 1 Daily maintenance Ver 20210506 ...