ESAB Plasmarc EPP-450 User Manual

42
SECTION 6 TROUBLESHOOTING
Problem Possible Cause Action
LED 6 – (red)  Right Over Cur-
rent
Note:
Ifoperationat275Aorlessis
possible,thentheLEFTsideis
notworking.
Cuttingatover275Awithafaultyleftside
(leftsideoutput=0)
Seefaultyleftorrightside
Rightcurrenttransducerconnectorloose
orunplugged.PCBloose.
Secureconnections
Loose or unplugged connector at right
PWM/DrivePrintedcircuitboard.
Secureconnection
P2atleftofPWM/DrivePCBlooseorun-
plugged.
Secureconnection
CheckvoltagebetweenP7-6andP7-7.A
voltage in either polarity of greater than
0.01Vindicatesafaultyrightcurrenttrans-
ducer(TD2).
Replace right current transducer
(TD2)
FaultyPCB1 ReplacePCB1P/N
0558038312
FaultyrightPWM/DrivePCB
Replace right PWM / Drive PCB  P/N
0558038324
LED9–(red)LeftOverCurrent
Note:
Ifoperationat275Aorlessis
possible,thentheRightsideis
notworking.
Cuttingatover275Awithafaultyrightside
(rightsideoutput=0)
Seefaultyrightside
Leftcurrenttransducerconnectorlooseor
unplugged.PCBloose.
Secureconnections
LooseorunpluggedconnectoratleftPWM
/DrivePrintedcircuitboard.
Secureconnection
P2 at right of PWM / Drive PCB loose or
unplugged.
Secureconnection
CheckvoltagebetweenP7-2andP7-3.A
voltage in either polarity of greater than
0.01Vindicatesafaultyleftcurrenttrans-
ducer(TD1).
Replaceleftcurrenttransducer(TD1)
FaultyPCB1 ReplacePCB1P/N
0558038312
FaultyleftPWM/DrivePCB
Replace left PWM / Drive PCB  P/N
0558038324
NEVER attempt to power-up or operate the power source with any
Gate / Emitter IGBT Plug disconnected from it’s PWM / Gate Drive
Board. Attempting to operate the power source with any open (un-
plugged) IGBT Gate / Emitter Connector may damage the IGBT and
the plasma cutting torch.
CAUTION

ESAB Plasmarc EPP-450 Specifications

General

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