gala gar GAR CUT 550 Manual Técnico De Instrucciones página 20

SYMPTOM. ANOMALY.
ALTHOUGH PILOT LIGHT L1 IS
ON AND AIR FLOWS, THERE IS
NO KIND OF REACTION OF
THE PILOT ARC WHEN PRESSED
THERE IS NO PENETRATION IN
THE CUT.
THE AIR FLOWS ALL THE TIME.
THERE IS NO PNEUMATIC
DISCONNECTION.
THERE IS PREMATURE WEAR OF
THE CONSUMABLE ELEMENTS.
SPECIALIZED PERSONNEL MUST CARRY OUT ANY WORK ON THE EQUIPMENT.
BOTH AT THE BEGINNING AND END OF A REPAIR CHECK THE EQUIPMENT
INSULATION LEVELS. DISCONNECT THE ELECTRONIC BOARDS WHEN MEASURING
The insulation-measuring device will have 500 V DC and will be applied to the following points of the circuit:
- Intake rectifier-Earth: Ra> 50 Mohms
- Outlet rectifier-Earth: Ra> 50 Mohms
- Switch l1 - Outlet rectifier: Ra> 50 Mohms
- Control circuit-Earth: Ra> 50 Mohms
In the event that lack of insulation is observed it is likely that this is due to the accumulation of metal dust on
the inside of the equipment.
BOTH AT THE BEGINNING AND END OF A REPAIR, BLOW THE INSIDE OF THE
GAR CUT (V. PROFESSIONAL). Instructions Manual.
PROBABLE CAUSE.
Although the high frequency generating plate
is excited the arc does not ignite.
There is not a correct no-load voltage of 283
V.
Switch l2 is selected in minimum position.
The part is very thick.
The cutting speed acquired is very high.
Consumable elements worn.
Low voltage in the installation.
Bad contact of the electric earth.
Air flow incorrect.
There is an impurity in one of the electrovalves
which prevents the piston closing the air flow.
Electronic control plate SCP-1 is faulty.
Low air flow.
There is not sufficient preflow of air.
THE INSULATION.
EQUIPMENT WITH COMPRESSED AIR.
POSSIBLE SOLUTION.
Replace high frequency generating plate.
Check rectifier, contactor, main transformer and
switches.
Place l2 at point 2.
Decrease cutting speed.
Replace electrode and/or nozzle.
Check with electricity company.
Make good contact of earth.
Observe if the pressure with the air flowing is 5.5
bar. Blow the inside of the cutting torch. Clean the
electrovalves.
Dismantle and clean the electrovalve.
Replace electronic plate SCP-1.
Increase the pressure. Check there is no brake in the
torch or the electrovalves where the air comes out.
Adjust the electronic plate SCP-1 suitably. Increase
Tprf.
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