Section V. TROUBLESHOOTING - TM-5-4120-274-150038

TM 5-4120-274-15

(3) Inspect filter for dirt.

(3) Spray with light coat of cd.

(4) Reinstall air filter into unit

b. Service.

3-10. Inspection of Panels, Grilles and Screens

(1) Wash filter in hot water or approved

solution.

Refer to figure 3-4 and 3-5 to inspect panels,

grilles, and screens.

(2) Dry with compressed air.

Figure 3-3 Air filter, removal and installation.

Section V. TROUBLESHOOTING

Probable remedy

Probable cause

3-11. General

Push reset button to reset

Contacts of high presure

This section provides information useful in diag-

cutout switch (fig. 3-13) .

cutout switch or low

nosing and correcting unsatisfactory operation or

pressure open

failure of the air conditioner and its components.

Easy trouble symptom stated is followed by a list

3-13. Compressor Starts but Goes Out on

of probable cauaes. The possible remedy is de-

Overload

scribed opposite the probable cause. Any trouble

Probable remedy

Probable cause

beyond the scope of organizational maintenance

Condenser fan not operat- Check motor leads and power

shall be reported to direct support maintenance.

line running to motor

ing

(para 5-22).

Condenser coil blocked ---Clean condenser coil (para

3-12. Compressor Fails to Start

3-55c(2)).

Probable cause

Probable remedy

3-14. Little or no Heating Capacity

Selector switch improperly Set switch to COOL position.

set

(fig. 2-1).

Probable remedy

Probable cause

Circuit breaker contracts

Reset circuit breaker (fig.

Selector switch improperly Set switch to proper setting

2-2).

(fig. 2-3).

set

open

3-6