TM 9-4120-403-14
TABLE 4-2. UNIT TROUBLESHOOTING (cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 3. Check operation of heater relay (K2).
Test relay.
If malfunction still exists, notify your
supervisor.
9. FAN MOTOR (B2) DOES NOT OPERATE.
Step 1. Check operation of mode selector switch (S).
Test switch. (See para 4-27.) Replace switch if defective.
Step 2. Check operation of fan motor relay (K7).
Test relay. (See para 4-53.) Notify your supervisor if defective.
Step 3. Check operation of fan motor capacitor (C4).
Step 4. Check operation of fan motor (B2).
Test motor. (See para 4-57.) Notify your supervisor if defective.
4-21