17
5- TROUBLE SHOOTING
Note!
The following troubles and causes are uncertain. However, during the process
of normal using conditions, that might happen.
NO.
TROUBLE
CAUSES
REMEDY
1
Power on indicator
does not light up, fan
does not run, no
output when machine
switches on
1) Power switch is
damaged
2) No electricity on the
electricity grid
3) Connect to 380V power
1) Check power
switch, fan connection
between main control
board and display
board
2) Check power supply
on the electricity grid
3) Check
2
Power on indicator
lights up, but
protection on
indicator does not
light, and no output
1) Output cable does not
connect well
2) Bad connection of
joints, especially torch
trigger cable connection
3) Display board is
damaged
1) Check output cable
connection
2) Check connection
3) Check and repair
3
Protection on
indicator lights up
1) Inner temperature is too
high
2) Temperature relay is
broken
3) Fan is locked-rotor, fan
cable is broken
4) Gas shortage
1) Let the machine
cool down
2) Replace
3) Check
4) Check gas pressure
4
Circuit breaker on the
switchboard trips
while in cutting
1) The following devices
may be damaged: power
IGBT tube, output diode,
input rectifier bridge,
thermistor,
electrolytic
capacitor
1) Check and replace
5
The cutting current is
unstable
1) Potentiometer is broken
2) Current sensor is
damaged
3) Bad connection of joints
1) Check and replace
2) Check and replace
3) Check and replace
6
Cutting current is not
adjustable
1) Current adjustment
potentiometer on front
panel is damaged
1) Check and replace
