11
USER MANUAL
TUNPLAS45A-DV
v.1.1
TROUBLESHOOTING
Symptom
Possible Causes
Solution
All LEDs are OFF when
equipment.
1. No electrical supply to the equipment
Check supply voltage
Check / replace power cable fuse
Verify that circuit breaker hasn’t been tripped
Contact your service technician
Arc does not ignite
1. Improper ground connection
Make certain that the work piece is contacted properly by the
Earth Clamp and that the work piece is properly cleaned near
the Earth Clamp and the cutting location
2. Improperly sized or excessively worn
nozzle
Verify that Nozzle is the proper size for the cutting torch used.
Check that the hole in the tip is not deformed, enlarged, or
dirty. If needed, replace Nozzle with proper size and type
Insufficient cutting penetration
1. Output current is too low
Increase output current by turning the current adjustment
knob in a clockwise direction. Make sure proper input power is
supplied
2. Material being cut is too thick
Refer to equipment specifications and choose a suitable
material to cut or switch to a more powerful plasma cutter for
the task
3. Cutting speed is too fast
Reduce torch travel speed.
4. Incorrect cutting angle
Adjust cutting angle and make sure torch head is vertical to the
workpiece
5. Consumables are worn out
Check the condition of the consumables and replace the worn
parts if necessary
Excessive slag formation
1. Consumables are worn out
Replace worn consumables, then reassemble the torch
ensuring all connections are secure
2. Improper cutting speed
Increase cutting speed if slag formed at the bottom, or
decrease if slag formed at the top of workpiece
No gas flow
1. Nozzle plugged
Clean the nozzle. If damaged, replace
2. Air supply hose blocked
Check, replace air supply hose
Cutting arc is not stable
1. Loose torch cable or earth / ground
clamp cable
Check to ensure that all connections are tight
2. Unstable line voltage
Check the line voltage and, if there are problems with the
wires, have a licensed electrician remedy the situation
3. Cutting current is too low
Increase cutting current through turning the knob clockwise
4. Torch travels too fast
Slow down the cutting speed
5. Torch consumables worn out
Check nozzle, shield cup, or electrode, replace if needed