ESAB ESP-50 Manual De Instrucciones página 232

sectIon 6
h. poor cutting performance.
1. Check air supply regulator . It should be adjusted to 65 - 75 psig (4.5 - 5.2
bars).
2. The air supplied to the torch should be free of oil and water.
3. Make sure the consumables in the torch are acceptable.
4. Check the output. Use a calibrated current probe capable of measuring 100
amps.
I. air does not shut off.
1. check air test, the gas solenoid valve is energized when the switch is in
the "on" position.
a. check voltage to solenoid coil, if present when torch switch is un-
plugged, replace pcb1.
b. Turn off primary power to the power source. If gas continues to flow,
replace the gas solenoid.
c. turn on primary power and check the status of the Fault light. If
the Fault light is on continuously and gas is on continuously, turn
off primary power and inspect the torch for proper assembly of the
electrode and nozzle. press firmly on the electrode and verify that
it retracts when pressed, and returns forward when released.
d. Reassemble the electrode and nozzle and turn on primary
power. After approximately two seconds the gas should come on
briefly then go off. If the Fault light comes on continuously and
gas remains off, check for defective torch trigger or shorted torch
trigger leads. I.
J. main arc is difficult to start.
1. the most common reason is worn or missing consumables. check and
replace if necessary.
2. Input air must be clean and dry.
3. Input air pressure must be between 65 - 75 psig (4.5 - 5.2 bars).
4. torch connections must be tight.
5. Work cable and clamp must be in good condition and must make a good
electrical connection to the material to be cut.
6. If above items check oK , the problem may be internal.
a. missing or weak pilot arc. check pilot arc resistors and pilot arc
wiring.
send unit to an authorized repair station for repair.
232
troubleshootInG
Main arc is difficult to start.