Section IV TROUBLESHOOTING

TM 5-4120-359-14

Section IV TROUBLESHOOTING

3-9. GENERAL

Troubleshooting by organizational maintenance is limited to checking operation of the air conditioner. Any failure in

performance or suspected problem, other than those described in table 3-2, should be reported to direct support

maintenance.

3-10. USE OF TROUBLESHOOTING TABLE

Table 3-2 contains troubleshooting information useful to organizational maintenance technicians in diagnosing and

correcting malfunctions or unsatisfactory operation of the air conditioner.

a. The troubleshooting table lists the common malfunction symptoms and unsatisfactory performance characteristics

that technicians are most likely to encounter; test and inspection steps to be followed to determine the cause; and the

corrective action(s) that should be performed for each possible cause are listed.

b. The technician should first find the malfunction symptom or unsatisfactory performance characteristic in the table

which most closely describes the immediate situation; then perform the test and inspections, and corrective action steps in

the order in which they are listed.

Table 3-2. TROUBLESHOOTING

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

AIR CONDITIONER WILL NOT START IN ANY MODE.

Step 1.

Press run indicator light if light illuminates contact direct support.

Step 2.

Check to see if air conditioner power circuit breaker in shelter has been turned off or tripped.

Reset circuit breaker.

Step 3.

Check to see if power cable to air conditioner has been disconnected.

Connect power cable.

Step 4.

Check to see if remote control cable has been disconnected.

Connect remote control cable.

CAUTION

Provided that military operational considerations allow the time, it is desirable, if

the power has been disconnected for an unknown period of time, to wait six hours

after reconnection before starting in the COOL mode. (See the caution in table 3-1,

INSUFFICIENT COOLING.

Step 1.

Check to see that MODE SELECTOR SWITCH is properly positioned.

Set switch to COOL

Step 2.

Check to see that TEMPERATURE CONTROL is set to COOLER position.

Set TEMPERATURE CONTROL to COOLER position.

Step 3.

Inspect fresh and return air filters, for dirt or blockage.

Clean filter/remove blockage.

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