Specifications

SECTION 6 Troubleshooting
ESP 400C and 600C Plasma Power Sources
6-4
6.3 Fault Isolation
Many of the most common problems are listed by
symptom.
6.3.1 Fans not working
6.3.2 Power not on
6.3.3 Fault Light Illumination
6.3.4 Torch won’t fire
6.3.5 Fusses Blown F1 and F2
6.3.6 Intermittent, Interrupted or Partial Operation
6.3.1 Fans Not Working
Problem Possible Cause Action
All Three fans do not run
This is normal when not cutting.
Fans run only when “Contactor On”
signal is received.
None
One or two fans do not run.
Broken or disconnected wire in fan
motor circuit.
Faulty fan(s)
Repair wire.
Replace fans
6.3.2 Power Not On or LOW Voltage
Problem Possible Cause Action
Power source inoperable:
Main Power lamp is off.
Missing 3-phase input voltage
Missing 1 of 3-phase input voltage
Restore all 3 phases of input voltage
to within ±10% of nominal line.
Restore all 3 phases of input voltage
to within ±10% of nominal line.
Low Open Circuit Voltage
Fuse F3 blown
Pilot arc Contactor (K4) faulty
Faulty Control PCB1
Replace F3
Replace K4
Replace Control PCB1 (P/N 38032)