Return to Master
Return to Master TOC
Return to Master TOC
Return to Master TOC
A.With the power switch SW1 OFF, check to see if leads L1A and L3A are shorted together. If they are shorted, visually inspect the leads. If the leads are okay, then power switch SW1 is faulty and must be replaced.
B.Remove leads L1, L2, and L3 from the main contactor. Check if the terminals of the main contactor are still shorted. If they are, the main contactor is faulty and must be replaced. If the terminals are not short- ed, the input lines themselves are shorted. Reconnect leads L1, L2, L3, L1A, and L3A to the main contactor.
9.Visually inspect terminals T1, T2, and T3 of the main contactor. Make sure they are not shorted together in any way. If they are not shorted, go to step 11. If they are shorted, go to step 10.
10.Remove leads T1, T2, and T3 from the main contactor.
A.Check if the terminals of the main contac- tor are still shorted. If they are, the main contactor is faulty and must be replaced.
B.Reconnect leads T1, T2, and T3 to the main contactor. Remove plug J30 from the protection board. Make sure that leads T1 and T3 of plug J30 between the main con- tactor and the protection board are not damaged, exposed, or shorted together. Check again for shorts across the contacts of the main contactor. If the terminals are not shorted now, the protection board is faulty. Replace the protection board.
C.Visually inspect leads T1, T2, and T3 between the main contactor and the input rectifier and between the main contactor and the protection board. If these leads are not damaged or exposed, then the input rectifier may be faulty and should be checked. Perform the Input Rectifier Test described in this section of the man- ual.
11.With the volt/ohmmeter, check for conti- nuity between the following terminals of the main contactor:
L1 and T1
L2 and T2
L3 and T3
If any of these measurements shows continu- ity, replace the main contactor. If no continuity is shown, go to step 12.
12.Visually check the following leads for damage, then check for continuity as described:
Lead #324 Between the main contactor and plug J32 - pin 4 of the protection board
Lead #326 Between the main contactor and plug J32 - pin 6 of the protection board
Lead #321 Between plug J71 - pin 1 of auxiliary Transformer 1 and plug J32 - pin 1 of the protec- tion board
Lead #323 Between plug J71 - pin 4 of auxiliary Transformer 1 and plug J32 - pin 3 of the protec- tion board
Lead T1 Between the main contactor and the protection board plug J30 - pin 11
Lead T3 Between the main contactor and the protection board plug J30 - pin 16
Put the power switch SW1 in the ON position for the next two continuity tests:
Lead H1B Between terminal L3 of | the |
main contactor and plug | J30 |
- pin 6 of the protection board
Lead #321A Between terminal L1 of the main contactor and plug J30
-pin 1 of the protection board Put the power switch SW1 in the OFF position.
Replace any broken or damaged leads discov- ered by these tests.
13.Connect any plugs disconnected for the tests. Replace the PC board cover with two sheet metal screws.
14.Install the machine case sides and top.
15.Install the handle and the lift bail rubber gasket.
