ESAB PCM-50i Instruction Manual page 20

SECTION 5
E. Red "FAULT" light ON.
Is the unit overheated?
("Fault" lights turns off
when Unit cools down.)
Yes
Duty cycle exceeded:
40% @ 50 A, 60% @ 80 A,
or 100% @ 30 A output
Is input voltage below 340 or above 460 volts?
Yes
Adjust voltage •
•
Fault light will energize if voltage falls below 340 volts for 0.3 seconds or exceeds 400 volts even for an instant.
The light will not turn OFF even when correct voltage is restored. Reset by placing PCM-50i power switch
OFF and then ON again.
NOTE: When in LOCK-IN mode, the FAULT light will turn on during second "trigger". This does not affect
performance. Turn off.
20
No
Is air flowing?
No
Repair power source
TROUBLESHOOTING
Yes No
See page 17