7 TROUBLESHOOTING
0446 404 001
- 22 -
© ESAB AB 2020
Error
Code
Displayed Content
Fault
Cause
Solution
Left
display
Right
display
E3
E3
None
Abnormal input
power
The input power
cable is not
connected properly.
Input power
overvoltage occurs.
Input power under
voltage occurs.
Input power phase
imbalance occurs.
The input power
frequency exceeds
the range.
Verify that the input
cables are
connected properly.
Verify that all the
three input phases
are present.
E4
E4
None
IGBT or diode
over-temperature
The rated duty
cycle is exceeded.
The air vent of the
housing is blocked.
The fan does not
work or slows
down.
Ensure that the
user does not
exceeds the rated
duty cycle range.
Verify that the air
vent is not blocked.
Verify that the fan
blades are not
stuck with any
foreign objects that
the fan blades are
not stuck with any
foreign objects.
E5
E5
1 - 8
Button error
Button is not
working. Button
does not rebound
after being
pressed.
Check the button
and make sure it
does not stick
E6
E6
None
Output overcurrent The output is
short-circuited, or
the current is too
high.
Verify that the
output is not
short-circuited.
E7
E7
None
Input power fault
The input power
cable is not
connected properly.
Input power phase
loss or phase
imbalance occurs.
Verify that the input
cables are
connected properly.
Verify that the input
power is normal.
E8
E8
None
Output overvoltage The input voltage is
too high. The
output cables are
not connected
correctly.
Verify that the input
voltage is normal.
Verify that the
output cables are
connected
correctly.
E9
E9
None
Primary side
overcurrent
The output is
short-circuited.
Verify that the
output is not
short-circuited.
