31
5-TROUBLE SHOOTING
Warning! An electric shock can be fatal. Before opening the
machine:
-
Switch it off and unplug it from the mains
-
Unplug machine from the mains
-
Put up a clearly legible and easy-to-understand warning sign to stop
anybody inadvertently switching it back on again
-
Check to make sure the electrically charged components
(e.g.capacitors) have been discharged.
-
Bolt in outer case also works for ground connection. Never use other
bolt, which can not work for ground connection.
Note!
The following troubles and causes are uncertain. However, during
the normal welding, that might happen.
No
Problem
Cause
Remedy
1
After power on,
it doesn’t work
Phase missing
Fuse (2A) in welding machine is broken
Cable is broken
Check power supply
Check
if
the
fan,
power transformer and main
control board is damaged
Check connection
2
Circuit breaker
on rear panel
trips while the
machine
is
working
normally
The following components may be
damaged: IGBT module, 3-phase rectify
module, output diode module, or other
components
Drive board is damaged
Short circuit of the cable
Check and replace
When
IGBT
Module is
damaged,
please
check
12Ω, 5.1Ω resistance or
SR160 on drive board
Check and repair
