ARC-E 400
15
Check if the input volt has the phase missing, and range are between 340~420V.
Check if the input cable is connected correctly and firmly with the power source.
Check if the welding cables are connected correctly and firmly.
WARNING: Have a qualified electrician do the maintenance and trouble shooting work. Turn the input
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,
the machine does
not 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 cooling fan,
transformer for ZKB/QDB
and main control board are
good or not.
(3)
Check connection
2
Circuit breaker on
back panel trips
while the machine
is
working
normally.
(1)
The following components
may be damaged: IGBT module,
3-phase rectify module, outputting
diode module, or other components
(2)
Drive board is damaged.
(3)
Short circuit between lines.
(1)
Check and replace.
(2)
When IGBT module is
damaged.
3
Welding current is
unstable.
(1)
Phase missing
(2)
The following components
may be damaged: Potentiometers,
switches on front panel.
(3)
Main control board is damaged
(1)
Check power source.
(2)
Check and replace.
4
Welding current is
not adjustable.
(1)
Potentiometer
of
welding
current adjustment is damaged.
(2)
Main
control
board
is
damaged.
Check and replace.
Table 6: Trouble Shooting Table
