ESAB ESP-101 - Page 51

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SECTION 6 TROUBLESHOOTING
I. Air does not shut o.
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 CNC cable is unplugged, replace PCB2.
b. Turn o primary power to the power source. If gas continues to ow, replace the gas solenoid.
1) 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 o primary power and inspect the torch for proper assembly of the elec-
trode and nozzle. Press rmly on the electrode and verify that it retracts when pressed, and returns
forward when released.
2) Reassemble the electrode and nozzle and turn on primary power. After approximately two seconds
the gas should come on briey then go o. If the Fault light comes on continuously and gas remains
o, check for defective torch trigger or shorted torch trigger leads.
J. Main arc is dicult 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 70 - 80 psig (4.8 - 5.5 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. Send unit to an Authorized Repair Station for
repair.
K. No pilot arc or main arc established if you depress torch switch or send start signal.
1. Check Help Code display.