ORGANIZATIONAL TROUBLESHOOTING TABLE - continued

TM 5-4120-374-13

4-16. ORGANIZATIONAL TROUBLESHOOTING TABLE (CONT)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

AIR OUTPUT

1. EVAPORATOR AIR OUTPUT VOLUME LOW

Step 1. Inspect return air and air diffuser grills for damage and cleanliness.

Clean, repair, or replace return air and air diffuser grills (para. 4-17).

Step 2. Inspect evaporator coil for damage, ice and cleanliness.

Clean evaporator coil (para. 4-31). Report damaged condition to direct support

maintenance personnel.

Step 3. Inspect circulating fan for security of attachment and damage.

Tighten setscrews in hub of circulating fan; replace fan if damage is indicated

Disconnect input power source before internal electrical troubleshooting.

Step 4. Test fan motor for resistance.

Consult Appendix F and replace fan motor if damage is indicated (para. 4-19).

2. CONDENSER AIR OUTPUT VOLUME LOW

Step 1. Inspect condenser coil for cleanliness or damage.

Clean condenser coil (para. 4-32). Report damaged condition to direct support

maintenance personnel.

Step 2. Test thermostat for resistance.

Replace defective thermostat (para. 4-23).

Step 3. Inspect condenser fan for security of attachment and damage.

Tighten setscrews in hub of condenser fan; replace fan if damage is indicated

Disconnect input power source before performing this maintenance task.

Step 4. Test fan motor for resistance.

Consult Appendix F and replace fan motor if damage is indicated (para. 4-19).

4-19