ESAB PCM-50i, Instruction Manual, Page: 21 / 32

SECTION 5 TROUBLESHOOTING
21
TORCH SWITCH
OPEN CLOSE
GAS SOLENOID VALVE
PREFLOW
FLOW SWITCH CLOSE
FAULT OVERLOAD LIGHT
HF CIRCUIT
INVERTER
CUTTING ARC (CURRENT)
5.3 Sequence of Operation
A. LOCK-IN "OFF" position
PUSH RELEASE
ENERGIZE
NOTES:
1. When the torch switch is pushed during postflow period, the postflow and preflow times are canceled, and the
HF is energized immediately.
2. When the red fault pilot light comes on, cutting operation should be stopped. The postflow time starts from
the moment the torch switch is released.
10 SEC
Postflow
OPEN
2 SEC.