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Section IV. ORGANIZATIONAL TROUBLESHOOTING
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TM-5-4120-374-13 Air Conditioner Horizontal 9 000 BTU/HR A.R.E. Manufacturing Co.Inc. Model FM9000 Manual
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ORGANIZATIONAL TROUBLESHOOTING TABLE - continued - TM-5-4120-374-130054
TM 5-4120-374-13
4-16. ORGANIZATIONAL TROUBLESHOOTING TABLE (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. INSUFFICIENT COOLING (CONT)
Step 4. Check compressor for proper operation (para. 4-29).
Report condition to direct support maintenance personnel.
Step 5. Inspect for closed, bent or stuck louvers in the return air grill.
Open louvers; straighten bent louvers or replace damaged return air grill (para. 4-17).
Step 6. Check to see that circulating fan is securely mounted on motor shaft and that there is no
indication of damage to circulating fan.
Tighten setscrews in hub of circulating fan or replace damaged circulating fan
3. EXCESSIVE NOISE
Step 1. Inspect circulating fan for damage and security of attachment.
Tighten setscrews in hub of circulating fan and any other loose mounting hardware
or replace damaged circulating fan (para. 4-21).
Step 2. Inspect condenser fan for damage and security of attachment.
Tighten setscrews in hub of condenser fan and any other loose mounting hardware
or replace damaged condenser fan (para. 4-20).
Step 3. Inspect fan motor for wear and damage.
Replace damaged fan motor (para. 4-19).
Step 4. Check to see if compressor is knocking or chattering.
Stop air conditioner and report condition to direct support maintenance personnel.
FANS
1. CIRCULATING FAN FAILS TO OPERATE
Step 1. Check to see if main power cord is plugged in.
Connect power cord to receptacle supplying 115 VAC, single phase, 60 Hz power.
Disconnect input power source before internal electrical troubleshooting.
Step 2. Test fan motor for resistance.
Consult Appendix F and replace fan motor if damage is indicated (para. 4-19).
Step 3. Check circulating fan for damage or binding.
Relieve binding or replace damaged circulating fan (para. 4-21).
Step 4. Test fan motor capacitor for continuity, leakage and capacitance.
Replace capacitor if damage is indicated (para. 4-24).
2. CONDENSER FAN FAILS TO OPERATE
Step 1. Check to see if main power cord is plugged in.
Connect power cord to receptacle supplying 115 VAC, single phase, 60 Hz power.
4-17

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