ESAB Plasmarc EPP-450 User Manual

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SECTION 6 TROUBLESHOOTING
6.3 Fault Isolation
Manyofthemostcommonproblemsarelistedbysymptom.
6.3.1 Nooutputwithcontactorsignalapplied
6.3.2 Outputlimitedto100A
6.3.3 Fansnotworking
6.3.4 Powernotonorlowvoltage
6.3.5 Faultlightillumination
6.3.6 Torchwon’tre
6.3.7 Fussesblown-F1andF2
6.3.8 Intermittent,interruptedorpartialoperation
6.3.3 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
6.3.1 No output with contactor signal applied
Problem Possible Cause Action
Contactor signal is applied,
contactor lamp on front
panelisilluminated,K2and
K3 contactors do not close
andlowbus faultlight,LED
5illuminates.
External emergency stop (E-stop) is
open.
ConnectisolatedcontactofE-stopswitchtopro-
videconnectionbetweenJ1-EandJ1-F.
E-stopbuttononfrontpanelispushed
in.
TwistandpullouttoresetE-stopcondition.
Powerresetlamponfrontpanelindi-
catesaseriousfaultcondition.
Refertosectionunderfaultlightillumination.
6.3.2 Output limited to 100A
Problem Possible Cause Action
Powersourcewillnotgoover
100A.
Highcurrentrangesignalmissing.
ExternalcontrolshouldconnectJ1-RtoJ1-T.As
analternative,inthepowersource,movethered
wireonTB8-1toTB8-2.

ESAB Plasmarc EPP-450 Specifications

General

Brand	ESAB
Model	Plasmarc EPP-450
Category	Welding System
Language	English