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VIII. Troubleshooting
Schedule
Fault
Indicator lamp for power is
off, fan is not operating and
without cutting output
Indicator lamp for power is
on, fan is not operating or
operating for a while and
without cutting output.
Fan
is
operating
indicator lamp for fault is
off, without rustle caused by
high frequency discharging.
No arc-starting when struck.
Indicator lamp for fault is
off and with rustle caused
by
high
frequency
discharging.
No
welding
output.
Indicator lamp for fault is
off and with rustle caused
by
high
frequency
discharging. Arcing when
struck.
Indicator lamp for fault is
on but without output.
VIII. Troubleshooting
1.
Power switch is damaged
2.
Ensure network connected with input cable is live or not.
3.
Ensure input cable is open or not.
1.
Connect with 380 V power by mistake to cause it activate over voltage
protection circuit. Reconnect with 220 V power and restart.
2.
220V power is unstable (input cable is too long) or connect with network to
cause it activate over voltage protection circuit. Increase the diameter of input
cable or joint for fixing input cable. Shut down and restart after 2 to 3
minutes.
3.
Connect power switch for on and off in short time to cause it activate over
voltage protection circuit. Shut down and restart after 2 to 3 minutes.
4.
Wire between switch and power panel is looseness and fix them again.
5.
24 V relay in main circuit is not engaged or damaged. Check 24 V power and
relay. Replace it by same model one if relay is damaged.
and
1.
Use multimeter (LGK-40ID)to measure the voltage between positive and
negative poles of
DC
be
308V.
2.
Auxiliary power does not work if the green indicator lamp for auxiliary power
on the upper power plate is off. Check for fault point and contact the
distributor.
3.
Check any poor contact for each wire.
4.
Control circuit is fault. Check reason and contact distributor.
5.
Control cable of cutter is broken.
1.
Cable of cutter is damaged.
2.
Grounding cable is damaged or not connects with work piece to be welded.
3.
Connections for positive output terminals or gas and electric output terminals
of welding torch are looseness.
1.
Poor contact between primary wire of striking arc transformer and power
plate. Refix it.
2.
Discharge nozzle is oxidized or too long. Remove the surface oxidation film
of discharge nozzle or adjust the distance of discharge nozzle to 1 mm.
3.
Some elements of high frequency arc striking circuit are damaged. Check and
replace.
1.
Over current protection. Shut down and restart after indicator lamp for fault is
off.
2.
Overheating protection. Do not shut down and wait for 2 to 3 minutes.
3.
Inverter circuit is fault. Remove power plug for main transformer on MOS
plate (close to fan VH-07 inserter) and restart.
1)
Indicator lamp for fault is still on. Shut down and remove high frequency arc
Troubleshooting
VH-07
pluging on MOS plate and upper power plate should
- 13 -
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