Table 5-1. Direct Support Troubleshooting Chart - Continued

TM 11-6140-224-13&P

Table 5-1. Direct Support Troubleshooting Chart - Continued

CONDITION

PROBABLE TROUBLE

CORRECTION

31 l 1V for 2 hours. The charge should be com-

plete and the switch should reset at least once

during the second hour of charge, otherwise

replace battery.

With battery at a temperature of 400F or less,

No capacity after low

Inoperative heater.

use ohmmeter and measure resistance between

temperature charge.

Pins A and C of connector MS3112E-14-5S.

Reading should be 10 +1 ohm. A reading of 20

ohms would indicate that one of the two heater

blankets are defective. Only the top heater is

replaceable. An open reading would indicate a

defective thermal switch. Replace thermal

switch or use battery only at temperatures

above 300F.

Loosen eight screws holding the control module

Overheating on

Shorted bypass diode.

plate to battery. Diode is located under 6 pin

charge

connector. Check with TS-352B/U in ohmmeter

mode. A low resistance in both directions would

indicate a defective diode. Replace diode if

shorted.

5-6