Nection. see figure f.6 .), Troubleshooting & repair, Control transformer (t2) voltage test (continued) – Lincoln Electric IDEALARC R3R-500 User Manual
Page 52
TROUBLESHOOTING & REPAIR
F-18
F-18
IDEALARC R3R
CONTROL TRANSFORMER (T2) VOLTAGE TEST (continued)
6.
Test for 115VAC between leads X1 and
#231.
NOTE: If the main AC input supply voltage
varies, the control transformer voltage will
vary by the same percentage.
a.
Connect one end of an insulated alliga-
tor clip to the X1 connection at the
input contactor (CR1) coil. See Figure
F.6.
b.
Connect the other end of the alligator
clip to one of the meter probes. Be
sure that neither the alligator clip nor
the meter probe touches any metal
surfaces.
c.
Connect the other meter probe to the
#231 connection at the power switch.
See Figure F.6.
d.
Apply input power to the R3R.
7.
Read the meter for 115VAC.
a.
If 115VAC is present, the control trans-
former is functioning properly.
b.
If 115VAC is NOT present, go to Step
8.
8.
If 115VAC is not present between leads X1
and #231, check the spliced connection
between #231 and X2. Test for correct
main input supply power to the control
transformer primary windings (H1, H2, H3,
etc.). Check the main input supply power
hookup to the machine. See the Wiring
Diagram.
a.
If the correct main input supply power
to the control transformer primary
windings is present AND the secondary
voltage is not correct, the control trans-
former may be faulty. Replace.
FIGURE F.6 – CONTROL TRANSFORMER X1 AND X2 TEST CONNECTIONS
RIGHT
SIDE VIEW
CASE BACK