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TM 5-4120-361-14
Table 4-2.
Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6.
EVAPORATOR AIR OUTPUT VOLUME LOW - Continued
Step 3.
Check for iced or dirty evaporator coil.
De-ice and clean coil (para 4-5).
Step 4.
Inspect evaporator fan for defect.
Replace defective fan.
Step 5.
Test fan motor for faulty operation.
Replace motor (para 4-21).
7.
CONDENSER AIR OUTLET VOLUME LOW
Step 1.
Step 2.
Step 3.
Step 4.
Step 5.
Check for dirty condenser coil or guard.
Clean coil and guard (para 4-4).
Check to see if air outlet louvers are stuck in closed position.
Free louvers and control cable.
Adjust control, or notify direct
support maintenance if actuating cylinder is not functioning
properly.
Check for defective HIGH-LOW condenser fan thermostatic switch.
Replace switch (para 4-26).
Inspect for defective condenser fan.
Replace fan.
Test for defective fan motor.
Replace motor (para 4-23).
8.
AIR CONDITIONER FAILS TO HEAT
Step
Step
Step
Step
1.
Check to see if mode selector switch is improperly adjusted.
Reset selector LOW heat or HIGH heat.
2.
Check to see if temperature selector control is set correctly.
Adjust control to WARMER.
3.
Inspect evaporator return air filter for dirty condition.
Clean filter (para 4-3).
4.
Inspect for defective temperature selector switch or mode selector
switch.
Replace defective switch (para 4-26).
4-13
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