gala gar Smart 400 MMA Manual De Instrucciones página 15

5. ANOMALIES. PROBABLE CAUSES. POSSIBLE SOLUTIONS.
SYMPTOM. ANOMALY.
GENERAL PROBLEM.
NOTHING WORKS.
LIMITER TRIPS
IT CAUSES NOISE
IF THE GREEN INDICATOR
IS ON THE APPLIANCE
DOES NOT WELD
THE ELECTRODE BURNS
IN TIG WELDING
THE EQUIPMENT HEATS
UP ABNORMALLY.
THE THERMAL
PROTECTION ACTIVATES
QUICKLY.
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.
The insulation-measuring device will have 500 V D.C. and will be applied to the following points of the circuit:
- Supply-Earth: Ra > 50 Mohms.
- Welding-Earth: Ra > 50 Mohms.
- Supply-Welding: Ra > 50 Mohms.
BEFORE TURNING THE EQUIPMENT ON, ENSURE THAT IT IS OFF LOAD.
DO NOT OPERATE THE ON/OFF SWITCH WITH AN ELECTRICAL LOAD
PROBABLE CAUSE.
The machine has no voltage in one or
all its vital elements.
Incorrect supply voltage.
ON/OFF switch faulty.
Front panel connector weak or loose.
Magnetothermal switch
gauge for the case. There may be a
short circuit, which is what causes the
limiter to trip.
Loose metal casing.
Defective electrical connections.
Damaged or poorly attached fan.
Active protection system. Mark 7
Over-current light illuminated.
Excessive welding intensity for a
certain electrode.
Use of reverse polarity.
Lack of protection gas.
The equipment is positioned so that it
prevents correct ventilation.
The fan does not work.
The equipment is located in a very hot
environment.
There is a loose connection inside the
equipment.
BLOW THE INSIDE OF THE EQUIPMENT WITH COMPRESSED AIR.
CONNECTED TO THE WELDING CONNECTORS.
SMART 400 MMA
POSSIBLE SOLUTION.
Make sure there is voltage at the entry to the
machine, if not the tapping must be changed or
the supply hose repaired. It is advisable to see if
any magnetothermal has "blown".
Check supply voltage.
Replace ON/OFF switch.
Fit correctly the front panel connector.
has low 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.
Review and screw casing.
Correctly tighten the connections.
Examine the fan.
Equipment overheated, wait until the equipment
cools down.
Possible fault in power circuit.
Decrease welding current or change electrode
for one with larger diameter.
Place electrode to negative pole.
Regulate at an appropriate flow.
Place the equipment in an area where the air is
constantly replaced.
Replace the fan.
Avoid positioning where there is direct exposure
to the sun.
Review the power electrical connections.
15