Troubleshooting & repair, Warning – Lincoln Electric INVERTEC POWER WAVE 450 SVM112-B User Manual
Page 89
POWER WAVE 450
F-29
F-29
AUXILIARY TRANSFORMER TEST #1
(continued)
TROUBLESHOOTING & REPAIR
11. Remove plugs J32 and J33 from the pro-
tection board.
12. Turn the main input supply power to the
machine back ON.
ELECTRIC SHOCK
can kill.
Proceed with caution. Be
careful not to touch any
internal machine compo-
nents during the remainder of the test proce-
dure.
13. Check for the correct AC voltage at plugs
J32 and J33 as follows. (DO NOT CHECK
THE VOLTAGE ON THE PROTECTION
BOARD!)
Test A: J33 - pin 1 (lead 32A) to J33 - pin
3 (lead 333) = 42 VAC
Test B: J33-1 (32A) to J33-4 (334) = 24
VAC
Test C: J32-1 (321) to J32-3 (323) = 24
VAC
Test D: J33-1 (leads 32A) to J33-6
(lead 336) = 115VAC.
If the voltage checks are good, then Auxiliary
Transformer #1 is good.
If Test C is good but Tests A and B are not cor-
rect, check the 5 amp circuit breaker (located
on the front panel of the machine). See the
Input and Auxiliary Circuit Wiring Diagram,
Figure F.6.
If all the secondary voltages are wrong or miss-
ing, check the associated wiring to the trans-
former primary. These voltages are most eas-
ily checked at the terminal strip. The correct
voltages are as follows:
H1 to H2 = 200 - 208 VAC
H1 to H3 = 220 - 230 VAC
H1 to H4 = 380 - 415 VAC
H1 to H5 = 440 - 460 VAC
If these voltages are wrong or missing, check
the associated wiring to the transformer prima-
ry. Check the leads at power switch S1. See
the Input and Auxiliary Circuit Wiring Diagram,
Figure F.6.
If the correct voltages are applied to the pri-
mary and the secondary voltages are incorrect,
the transformer may be faulty. Replace the
transformer. Refer to the T1 Auxiliary
Transformer Removal and Replacement
procedure in this section of the manual.
14. After the test is completed and the prob-
lem successfully repaired, reconnect
plugs J30, J32 and J33 to the protection
board.
15. Reconnect plug J5 to the T2 transformer.
16. Reconnect the 5 leads to the main con-
tactor CR1.
17. Install the PC board cover.
18. Install the machine case sides and top.
19. Install the handle and the lift bail rubber
gasket.
WARNING