38
section 6
troubleshootinG
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 4 fans do not run
This is normal when not cutting.
Fans run only when “Contactor On”
signal is received.
None
1, 2 or 3 fans do not run.
Broken or disconnected wire in fan
motor circuit.
Repair wire.
Faulty fan(s)
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
Restore all 3 phases of input voltage to within
±10% of nominal line.
Missing 1 of 3-phase input voltage
Restore all 3 phases of input voltage to within
±10% of nominal line.
Low open circuit voltage
Fuse F3 blown
Replace F3
Pilot arc Contactor (K4) faulty
Replace K4
Faulty Control PCB1
Replace Control PCB1 (P/N 0558038287)
Содержание EPP-400
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Страница 78: ...notes ...
Страница 79: ...revision history 1 Original release 11 2006 2 Revision 08 2010 Updated with new DOC form ...