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Page Title:
Table 5-1. Direct Support Troubleshooting Chart |
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 TM 11-6140-224-13&P
Table 5-1.
Direct Support Troubleshooting Chart
CONDITION
PROBABLE TROUBLE
CORRECTION
No storage battery voltage.
Defective control module.
First check fuse. If fuse is good, connect to
30 volt DC source and attempt to charge. If
no voltage is measurable at the external
connector, check voltage between Pin 1
(minus) on top connector and socket A (plus)
of the internal connector. If normal voltage is
present across these points, then remove four
hold-down screws and disconnect the internal
battery connector. Lift out entire control module.
Replace with new module and attempt to charge
again.
Battery overtemperature cutout defective.
With control module connected but not
mounted on battery, lift up insulators and top
heating pad. The thermal cutout is located
between the two end cells farthest from the
connectors. Check for continuity with an
ohmmeter. If thermal cutout is open, replace or
bypass with a short length of no. 6 wire.
Defective cell (open) or open connection
Using voltmeter, place negative probe in Pin
in battery.
1 of top connector and probe with positive
lead from cell to cell until source of open is
found. Resolder any broken connections if
found, taking care not to overheat cells. If a
cell is internally open, the battery must be
replaced. Return defective battery as a
source of spare parts.
No storage battery voltage
Defective bypass diode.
Test diode for continuity with multimeter and
immediately after full charge.
replace if defective.
5-3
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