ESAB ESP-101 Instruction Manual page 281

sectIoN 6
6.3 troubleshooting Guide
A. power (led display) does not come on.
1. Visually inspect the machine for any damage.
2. Check if the cooling fan is running. If not, then check the following :
a. Check if the machine power cord is plugged to the input power receptacle.
b. Measure the input power at the receptacle. If not present, then check the wall disconnect switch and
it's fuses.
c. Check Fuse (F1). If fuse is ok, then check the input switch (S1) for proper operation. Replace if defec-
tive.
3. If above items check OK , the problem is internal. send unit to an Authorized Repair station for repair.
a. If the cooling fan is running, then measure voltage between the following:
• between P1-1 and P3-1 for 28 vac (if no voltage replace T1)
• between TP-1 and TP-2 for 24 vdc
• between P2-1 and P2-10 for 24 vdc
• between P2-3 and P2-10 for 24 vdc
• between TB1-1 (black) and TB1-2 (red) for 24 vdc.
b. If the voltage is present, then the pilot light may be burnt out.
B. fault light remains on at power-up.
1. Verify start signal is not present. If so, clear start signal, fault should reset.
2. Switch power to OFF, verify consumables are installed correctly.
c. No Air flow
1. Check air inlet supply. Unit requires 500 cfh (14.2 cmh) at 70 to 80 psig (4.8 to 5.5 bars) with 100 amp consum-
able set.
2. Check air hose and connections. Tighten if leaking.
3. Does air flow 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.
send unit to an Authorized Repair station for repair.
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