Red-D-Arc D502K 5+4, Technical Manual

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TM-4412 Page 51 D502K 5+4
10-12. Checking Unit Output After Servicing
803 210 / 803 201
Start engine and check engine
speed. Adjust engine speed if nec-
essary (see Section 7-5).
1 Duplex Receptacles GFCI1
And RC1
2 Resistor R3
Turn Voltage/Amperage Adjust
control R1 to max. Place Process/
Contactor Control switch S6 in
Weld Terminals Always On – CC
Stick position.
Check voltage at each receptacle.
With no load applied, there should
be 126 to 130 volts ac present at
GFCI1 and 252 to 260 volts ac at
RC1.
If correct voltage is not present,
stop engine and reconnect lead 102
and/or lead 106 to different taps on
R3.
.
Connect R3 so at least half of
resistor length is in circuit.
Start engine and check GFCI1 and
RC1 voltage. If necessary, change
R3 connections until correct volt-
age is obtained at receptacles with-
out exceeding 4.6 amperes dc ex-
citer revolving field current (see
Section 10-2).
Check open-circuit voltage across
weld output terminals. There
should be 90 volts dc present. If
correct voltages are not present, re-
peat troubleshooting procedures in
Section 10-1.
Y
Stop engine.
Allow engine to cool, and then com-
plete pre-operational checks in
table.
Pre-Operational Checks
Wipe engine surfaces clean.
Check labels; replace labels that are unreadable or damaged.
Check and correct any fluid leaks.
Clean weld output and battery terminals. Tighten connections.
Clean outside of entire unit.
Tools Needed:
Test Equipment Needed:
1
Y
Stop engine before adjusting resistor R3.
2
Check fuel and oil (see Section 4-5).