GALAGAR GAR AC 180 Manual Técnico De Instrucciones página 17

CAPITULO 5. ANOMALIAS. CAUSAS PROBABLES. SOLUCIONES POSIBLES.
SYMPTOM. ANOMALY SYMPTOM. ANOMALY
SYMPTOM. ANOMALY SYMPTOM. ANOMALY
GENERAL PROBLEM
NOTHING WORKS.
LIMITER TRIPS
ALTHOUGH THE MACHINE IS
CONNECTED AND WITH LIGHT
K ON, THE MACHINE DOES NOT
CARRY OUT THE WELDING
OPERATION
IT WORKS AT LOW INTENSITY
THERE ARE NOISES
THE ELECTRODE BURNS IN THE
T.I.G. WELDING
ANY WORK ON THE EQUIPMENT MUST BE CARRIED OUT BY SPECIALISED PERSONNEL
BOTH AT THE BEGINNING AND END OF A REPAIR CHECK THE EQUIPMENT INSULATION LEVELS.
DISCONNECT THE ELECTRONIC PLATES WHEN MEASURING THE INSULATION.
The insulation measuring instrument will have 500 V D.C. and will be applied at the following points of the
circuit:
- Supply-Earth: RA>50 Mohms
- Welding-Earth: Ra>50 Mohms
- Supply-Welding: 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 EQUIPMENT WITH BOTH AT THE BEGINNING AND END OF A REPAIR, BLOW THE INSIDE OF THE EQUIPMENT WITH BOTH AT THE BEGINNING AND END OF A REPAIR, BLOW THE INSIDE OF THE EQUIPMENT WITH BOTH AT THE BEGINNING AND END OF A REPAIR, BLOW THE INSIDE OF THE EQUIPMENT WITH
GAR AC/DC 180. Instructions Manual.
PROBABLE CAUSE PROBABLE CAUSE
PROBABLE CAUSE PROBABLE CAUSE
The machine has no voltage in one or all its vital
elements.
Magnetothermal switch has low gauge for the
case. There may be a shortcircuit which is what
causes the limiter to trip.
Coil burnt (Primary)
Connection is made to 220 V when the power
supply was 380 V.
Defect in the electrical wiring diagram.
The electrical supply is not correct.
Supply cables broken or badly connected.
Switch broken
Loose coil or connection.
Coil burnt (Primary)
One phase is missing
Secondary coil burnt
Diodes deteriorated
Blocks broken
Metal shell loose
Spirals loose in one of the coils
No protection gas
Excessive welding intensity for a certain electrode Decrease welding current or change electrode for
Use of inverse polarity
COMPRESSED AIR. COMPRESSED AIR. COMPRESSED AIR. COMPRESSED AIR.
POSSIBLE SOLUTION POSSIBLE SOLUTION
POSSIBLE SOLUTION POSSIBLE SOLUTION
Make sure there is voltage at the entry to the machine;
if not the intake must be changed or the supply hose
repaired. It is advisable to see if any magnetothermal
has "blown".
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 welding
work must be tested at lower current levels.
Change coil.
Change position of on/off switch. Place the safety
switch into its correct position.
Test internal connections. Test switch points, voltage at
transformer ouput (40V approximately)
Change the supply intake.
Repair connection.
Change switch.
Repair connection.
Change coil.
Repair electrical connection
Change coil
Change rectifier
Change blocks.
Check and screw shell
Change or varnish the coil
Set at a suitable flow volume.
another one with greater diameter
Place the electrode at negative pole
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