ESAB POWERCUT-1250 Guia de Resolução de Problemas descarregar pdf (Página 8)

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5.1 TROUBLESHOOTING GUIDE

A. Power Light does not come on.

1. Visually inspect the machine for any damage.

2. Check following:

a. Check if the machine power cord is plugged into the input power receptacle.

b. Measure the input power at the receptacle. If not present, then check the wall discon-

nect switch and it’s fuses.

c. Check Fuse (F1).

3. If above items check OK , the problem is internal. Send unit to an Authorized Repair Station

for repair.

a. Ensure that ribbon cable is connected to main PCB-1 and front panel PCB-3

b. Measure voltage between pins P7-5 and P7-6 of the control board. If there is no volt-

age, then replace Control Transformer (T6).

c. If the voltage is present, then the pilot light may be burnt out.

B. No Air Flow

1. Check air inlet supply. Unit requires 350 cfh at 80psig (165.1 l/m @ 5.5 bars).

2. Check air hose and connections. Tighten if leaking.

3. Does air ow when “air test” switch is in test position?

a. If not, check torch consumables, replace if necessary.

b. If above items check OK , the problem is internal. Take unit to an Authorized Repair Sta-

tion for repair.

C. The Power light is on, but nothing happens when the torch switch is depressed. Fault light

does not activate.

NOTE: Unplug high frequency connection before attempting to work on this problem.

1. With the machine power on, depress the torch switch. On the control board the LED 1 should be

lit as long as the switch is depressed. If not then check:

a. Turn power o to the machine. Unplug Control board. Put an ohmmeter across J3-3 and

J3-4 to take resistance reading. Depress torch switch. Meter should read a short. If not,

then one of the following is not working properly:

b. Torch switch or the leads. Unplug the torch switch leads at the machine. Put a meter

across the two plug pins. Meter should read a short when the torch switch is depressed.

If not, then either there are broken switch leads or a malfunctioning switch.

SECTION 5 TROUBLESHOOTING

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