ESAB Plasmarc EPP-450 User Manual

61
SECTION 6 TROUBLESHOOTING
6.10 High / Low Cut Current Modes and Mark Mode
Aremotecontactconnecting115VACfromJ1-RtoJ1-SplacesthePilotArcinHighbyoperatingK8.Note,thatforthisfunc-
tiontooperate,thePilotArcHi/Loswitchonthefrontpanelmustbeinthe“LO”position.
TheEPP-450isplacedintheMarkingmodewhenaremotecontactconnecting115VACfromJ1-RtoJ1-CoperatesK11.In
theMarkingmode,anormallyclosedcontactonK11opensturningoK10.WhenK10turnso,theBoostsupplyisdiscon-
nectedloweringthenormalCuttingMode430VDCOpenCircuitVoltageto360VDCforMarking.Anormallyopencontact
onK11activatesK12.K12connectstheI(min)resistorsnecessaryforstabilizingthelowcurrentsrequiredformarking.In
theCuttingmode,theminimumstableoutputcurrentis50Ainthehighcurrentrange,35Ainthelowcurrentrangeand
10Ainthemarkingmode.Inthemarkingmode,thenormallyclosedcontactsK11(3,9)andK11(1,7)open.Thisdeactivates
K13andK14placingthepowersourceinthelowcurrentrange.
LO
HI
5
6
H
1
K11
CUT/
MARK
10 2W
J6-A
A
PILOT ARC
FN4
J1-R
J1-M
5
115V
G
A
J1-S
1µF
4
12
AC
CUT
A
J1-C
TB9-18
8
3
MARK
K11
3
9
H
LO
58
K13
BOOST
R70
J1-Z
TB1-8
TB9-13
K8
600V
K10
N
K11
6
9
K3
J6-B
I(min) RESISTORS
K12
HI/LO
TB8-7
S1
TB1-7
HI
WHT
TB8-1
L3
K4
T3
J1-T
CUT
CURRENT
RANGE
K13
RED
MOVE RED WIRE FROM
TB8-1 TO TB8-2 FOR
FOR HI CURRENT RANGE
TB8-2
LO
HI
K13
3
9
PILOT
ARC
FAN
M5
CONTACTOR SIGNAL
PL2
N
7
K11
K14
115 VAC
P5-1
T7
SEC 40VCT
20V20V
Z BIAS
P5-2P5-3
PRI 120V
PCB3 Right
PWM/Gate Drive
N
69
K13
D
SEE PAGE 2
PCB10 P1-2
TB8-7
TB1-7
TB8-8
N
HIGH/LOW CUT CURRENT MODES & MARK MODE

ESAB Plasmarc EPP-450 Specifications

General

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