17
power off, using the disconnect switch at the fuse box before working inside the machine. Don’t open up
case uninstructed, the max volt inside machine is 600V, Never discharge high voltage to welder case with
welding torch! Shut down power source before changing or repairing welding cable or torch
№
TROUBLE
CAUSES
WHAT TO DO
1
After power on, it
doesn’t work.
1)
Phase missing in power source
2)
Fuse
（
2A
）
in welder is broken.
3)
Cable is broken
1)
Check power source
2)
Check
if
the
Fan,
Transformer for ZKB/QDB
and Main Control Board are
good or not.
3)
Check connection
2
Circuit Breaker on
Rear
Panel
trips
while the machine is
working normally.
1) The following components may
be damaged: IGBT Module, 3-phase
Rectify Module, Output Diode
Module, or other components
2) Drive Board is damaged.
3) Short circuit of the cable.
1) Check and replace.
2) When IGBT Module is
damaged, please check 12Ω, 5.1Ω
resistance or SR160 on Drive
Board is damaged or not.
3) Check and repair.
3
Welding current is
unstable.
1)
Phase missing
2)
The following components may be
damaged: Potentiometers, switches on
front panel and remote control cable,
potentiometer on remote controller.
3)
Main Control Board is damaged
1)
Check power source.
2)
Check and replace.
3)
Check and replace.
4
Welding current is
not adjustable.
1)
Welding Current Rotary Encoder is
damaged.
2)
Remote control cable is broken.
3)
Main Control Board is damaged
4)
The switch on the front panel is damaged
Check and replace.
5
TIG
welding
is
abnormal.
1) TIG torch switch is damaged.
2) Remote control cable is broken.
3) The tungsten electrode in welder is in the
wrong position.
4) Main Control Board is damaged
Check and replace.
Table 9: Trouble Shooting Table
