Chapter 5. Anomalies. Probable Causes. Possible Solutions - gala gar GAR CUT 550 Manual Técnico De Instrucciones

MAINTAIN THE STATE AND EFFICIENCY OF
THE AIR DIFFUSER AND NOZZLE-HOLDER.
The air outlet holes of these components must be
free from occlusions. Faulty air diffusion causes
the torch to heat up too much, with the subsequent
deterioration of the torch head.
KEEP THE
OCCLUSIONS AND SLAG
Clean the nozzle from time to time. If there is
slag on the surface base there could be arc
ignition problems. Use a cleaning brush, never
sharp elements, as the nozzle hole could be
deformed.
MAKE SURE THE ELECTRODE SEATING IS
CLEAN AND EVEN.
CHAPTER 5. ANOMALIES. PROBABLE CAUSES. POSSIBLE SOLUTIONS.
SYMPTOM. ANOMALY.
GENERAL PROBLEM.
NOTHING WORKS
.
LIMITER TRIPS
ALTHOUGH THE MACHINE IS
CONNECTED AND WITH LIGHT
C ON, THERE IS NO REACTION
WHEN PRESSED
WHEN PRESSED, EVEN
THOUGH AIR COMES OUT, THE
ARC DOES NOT IGNITE OR THE
ARC "BACKFIRES".
GAR CUT (V. PROFESSIONAL). Instructions Manual.
NOZZLE CLEAN
MAINTAIN THE SAFETY SYSTEM OF THE TORCH ACTIVE.
PROBABLE CAUSE.
The machine has no voltage in one or all its
vital elements.
Magnetothermal switch has low gauge for the
case (if it is the main one the installation may
have an installed power of under 15 kw
minimum). There may be a short circuit, which
is what causes the limiter to trip.
Low air pressure. Machine not operative. Red
light on.
Transformer overheated. Machine not
operative.
Failure in the torch safety system. The nozzle-
holder of the pistol may not be perfectly
tightened.
Failure of the pistol switch which does not
make perfect contact.
Main electronic plate SCP-1 faulty.
Air pressure set at a high value.
New electrode with insulating surface layer.
Slag on flat part of the nozzle.
Excessive wear of the electrode.
Low quality electrode or nozzle.
The preflow cycle is not completed as the
pushbutton is released quickly.
The high frequency electronic plate GHF is not
excited with 230 V.
The breakdown of the central control plate is
reiterative.
IMMEDIATELY CHANGE A WORN
ELECTRODE OR A NOZZLE.
We can say that there is wear:
- If the middle hole of the electrode is 2 mm.
- If the nozzle has an irregular hole or increased
diameter.
perpendicularity in the cutting section).
OF
DO NOT CUT WITH THE TORCH VERY
HOT. (Wait until the air cools it totally).
BRUSH THE NEW ELECTRODES.
KEEP THE ELECTRIC CONNECTION OF
THE NOZZLE-HOLDER CLEAN (SECURING
THREAD).
POSSIBLE SOLUTION.
Make sure there is voltage at the entry to the
machine; if not the intake must be changed. It is
advisable to see if any magnetothermal has "blown".
Check that fuse F1 is not open.
The machine panels must be removed testing the
logical points of the electrical diagram.
Change the magnetothermal for another larger
gauge one. It is important for the magnetothermal
switch to have a characteristic slow type curve. In the
event that the electrical installation has limited power
the cutting work must be tested at lower current
levels. (Pos. 1 of switch l2).
Increase the intake pressure by means of pressure
reducing valve situated on the rear of the apparatus.
Amber light on. Wait until the machine cools down.
Screw in the nozzle-holder well.
Change torch microswitch.
Replace electronic plate SCP-1
Decrease it to a value of 5.3 bar with pressure
reducing valve R.
Brush electrode. "Polish the electrode".
Clean the nozzle properly.
Replace the electrode.
Use original spares.
Keep the pushbutton pressed for more than one
second.
Replace
connections and wiring.
Check the degree of insulation of the equipment.
Blow the inside with compressed air.
(In this case there will be no
(Polish the electrode.)
electronic control plate.
19
Supervise