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F-36 TROUBLESHOOTING AND REPAIRF-36
INPUT CONTACTOR TEST (continued)
FIGURE F.6 — INPUT CONTACTOR COIL.
INPUT
CONTACTOR
X4/X4A
601/601A
TEST PROCEDURE | FIGURE F.7 — INPUT CONTACTOR |
| TEST POINTS. |
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1.Remove input power to the Power Wave 455.
2.Using the 3/8 in. nutdriver, remove the input access panel and case top.
3.Locate, mark, and remove the four leads (601, 601A, X4 and X4A) that are connected to the input contactor coil. Refer to Figure F.6.
4.Using the external 24 VAC supply, apply 24 VAC to the terminals of the input contactor coil. If the contactor does NOT activate, the input contactor is faulty. Replace.
5.With the input contactor activated, check the continuity across the three sets of contacts. (Zero ohms or very low resistance is normal). Refer to Figure F.7. If the resistance is high, the input contactor is faulty. Replace the input contactor.
L3 | T3 |
L2 | T2 |
L1 | T1 |
6.When the contactor is NOT activated, the resistance should be infinite or very high across the contacts. If the resis- tance is low, the input contactor is faulty.
7.Reconnect the four leads (601, 601A, X4, and X4A) to the input contactor coil.
8.Install the input access door and case top using the 3/8 in. nutdriver.
