Lincoln Electric X-TRACTOR 3A Service Manual page 40

X-TRACTOR ® 3A
PROCEDURE
1. Remove input power to the X-Tractor 3A.
2. Perform the Case Cover Removal Procedure.
3. Locate the timer T2 on the DIN rail. See Figure F.12.
4. Using a phillips screwdriver, label and disconnect leads A1 and A2
from the timer T2. See Figure F.13.
5. Carefully apply the external 24VAC supply to terminals A1 and A2
on the timer T2. The green LED should come on. If it does not
illuminate with the 24VAC applied to terminals A1 and A2, the
timer T2 may be faulty.
6. With the 24VAC applied to terminals A1 and A2 check the
resistance between the contact terminals 18 and 15. The
terminals should be "open".
7. Carefully jumper terminals A1 and Y1 together. The yellow LED
should illuminate and the contact terminals 18 and 15 should
close and the resistance between the two should be zero ohms.
8. Carefully remove the jumper from terminal Y1. The yellow LED
should then start to flash and the contact terminals 18 and 15
should still be closed for approximately 30 seconds with zero
resistance between the two. The contact terminals should then
open and yellow LED should go out.
9. If the timer T2 does not pass any of the above tests check the
settings on the timer. If the settings are correct the timer T2 may
be faulty. See Figure F.14 for the correct settings.
TIMER T2 TEST
Figure F.12 – Timer T2 location
TIMER T2
(LOCATED ON DIN RAIL)
10. Connect all leads previously removed.
11. Perform the Case Cover Replacement Procedure.
F-26
TROUBLESHOOTING AND REPAIR
(continued)