Inhoudsopgave
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9. Probleemoplossingen
Warning
Experimentation and careless maintenance may lead to more problems to the machine. This will make pro-
fessional diagnosis and repair more difficult. When the machine is open, there may be exposed connections
containing life-threatening voltages. Any direct or indirect touch will cause electric shock, and severe electric
shock will lead to death.
Notes: only attempt to repair this machine if you have knowledge and understanding of electronic compo-
nents and the danger of high voltage electricity.
Common Malfunction Analysis and Solution:
Power indicator is not lit, fan does not work and no welding output
Power indicator is lit, fan works, no welding output
QC(Quality Control) LED is on continuously or when striking an arc
Output current is not stable
If the machine still fails to work after maintenance and troubleshooting, please contact and
consult with local distributor or after-sale service center.
Malfunction
Cause and Solution
1. Make sure if power switch is working.
2. Check if connection from power switch to power board is in good
condition.
3. Check if the plug you are using is working.
4. Check if input voltage is correct.
5. Control board might be faulty.
1. Check if all cables are connected properly.
2. Output connectors are disconnected or damaged.
3. Control circuit might be faulty.
1. The machine can be in over-heat protection. Wait for 15 minutes
2. The machine can be in over-current protection. Turn off the machine
for 30 seconds and then switch on again. If QC LED is still on and not
working. there is a fault on the board.
3. IGBT on control board might be faulty.
4. Fast recovery diodes or transformer might be faulty.
1. Input voltage is not stable.
2. There is harmful interference from input voltage or other equipment.
3. Check if there is any loose contact inside the machine. If any, please
reconnect.
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