Table f.6, Troubleshooting & repair, T2) auxiliary transformer test (continued) – Lincoln Electric PRO-CUT 55 SVM140-A User Manual
Page 73
7. If the correct test voltages are present, the
auxiliary transformer is good.
8. If any of the voltages are missing or very low
with the proper primary voltage applied, the
auxiliary transformer may be faulty.
9. If the auxiliary transformer tests good but it
does not function when connected to the
Pro-Cut 55, check the harness wiring to the
auxiliary transformer. See the Wiring
Diagram.
10. When finished with the test, replace plugs
21 and 22 and the case wraparound.
NOTE: There should not be continuity between
the isolated windings. With the input
power removed from the transformer,
check the windings using the table
below.
TROUBLESHOOTING & REPAIR
F-36
F-36
PRO-CUT 55
(T2) AUXILIARY TRANSFORMER TEST (continued)
TEST POINT
TEST POINT
EXPECTED VOLTAGE
H1 (1J22)
H2 (4J22)
200 - 208VAC
H1 (1J22)
H4 (3J22)
380 - 415VAC
H1 (1J22)
H5 (6J22)
440 - 460VAC
Brown (8J21)
Brown (3J21)
12VAC
Red (2J21)
Red (6J21)
24VAC
Blue (9J21)
White (5J21)
18VAC
Blue (4J21)
White (5J21)
18VAC
TABLE F.6 - J21 AND J22 (6 Pin) VOLTAGES
TEST POINT
TEST POINT
EXPECTED VOLTAGE
H1 (1J22)
H2 (5J22)
200 - 208VAC
H1 (1J22)
H4 (7J22)
380 - 415VAC
H1 (1J22)
H5 (8J22)
440 - 460VAC
H1 (1J22)
H6 (4J22)
560 - 600VAC
Brown (8J21)
Brown (3J21)
12VAC
Red (2J21)
Red (6J21)
24VAC
Blue (9J21)
White (5J21)
18VAC
Blue (4J21)
White (5J21)
18VAC
J21 AND J22 (8 Pin) VOLTAGES
TEST POINT
TEST POINT
EXPECTED RESISTANCE
H1
Brown Lead
Greater than 100 K ohms
H1
Red Lead
Greater than 100 K ohms
H1
Blue/White Leads
Greater than 100 K ohms
Brown Leads
Red Leads
Greater than 100 K ohms
Brown Leads
Blue/White Leads
Greater than 100 K ohms
Red Leads
Blue/White Leads
Greater than 100 K ohms