TM 10-8145-222-23
0052
TEST CONTINUED
12. Reconnect three tagged ground wires to power box (Figure 1, Item 10) using one screw (Figure 1, Item 9),
washer (Figure 1, Item 8), new lock washer (Figure 1, Item 7), and power box ground lug (Figure 1, Item 6).
Tighten hardware (WP 0091).
13. Reconnect wiring (Figure 1, Item 5) to transformer TR1 (Figure 1, Item 3) terminal TR1-X0 (Figure 3).
14. Reconnect wiring (Figure 1, Item 4) to switch S1 (Figure 1, Item 2) terminals S1-1, S1-5, and S1-9 (Figure 3).
15. Remove tags from wiring.
16. Close power box door (Figure 1, Item 1).
17. Reconnect battery negative (-) terminal (WP 0053, Reconnect).
18. Place MTRCS back into desired mode of operation (TM 10-8415-222-10, Operating Procedures).
Test Cable Assembly P2A
WARNING
High voltage is present when the system is in operation. Use extreme care not to
contact wires during operation as serious injury or death to personnel could result.
The MTRCS contains high voltage sources and exposed rotating parts. Make sure
that power cables are disconnected from the MTRCS and that the refrigeration unit is
shut down before performing maintenance on the unit. Failure to comply with this
warning can result in serious injury or death to personnel.
1. Make sure external electrical power unit is turned OFF.
2. Open power box door (Figure 1, Item 1).
3. Use a multimeter set to AC voltage scale to verify no voltage is present on switch S1 (Figure 1, Item 2)
terminals S1-3, S1-7, and S1-11 (Figure 2).
4. Use a multimeter set to AC voltage scale to verify no voltage is present on transformer TR1 (Figure 1, Item 3)
terminal TR1-X0 (Figure 3).
5. Tag and disconnect wiring (Figure 1, Item 4) to switch S1 (Figure 1, Item 2) terminals S1-3, S1-7, and S1-11
(Figure 2).
6. Tag and disconnect wiring (Figure 1, Item 5) to transformer TR1 (Figure 1, Item 4) terminal TR1-X0 (Figure 4).
7. Tag ground wires leading to power box lug GND (Figure 1, Item 6).
8. Remove one power box ground lug (Figure 1, Item 6), lock washer (Figure 1, Item 7), washer (Figure 1, Item 8),
and screw (Figure 1, Item 9) securing three ground wires to power box (Figure 1, Item 10). Discard lock washer.
9. Disconnect ground wires and position disconnected ground wires away from transformer (Figure 1, Item 3).
Temporarily secure if needed.
10. Use a multimeter set to ohms scale to make Cable Assembly P2A (Figure 5) continuity checks as shown in
Table 2.
0052-5
