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Page Title: UNIT TROUBLESHOOTING-(cont.)
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TM 9-4120-389-14 Table 4-2.  UNIT TROUBLESHOOTING-(cont.) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Step 4. Check operation of mode selector switch (S1).  Test switch.  (See para.  4-41). Replace switch if defective. 8. CONDENSER FAN MOTOR (B2) DOES NOT OPERATE. WARNING Disconnect input power before performing internal electrical troubleshooting. Voltages used can be deadly. Tighten or replace loose or damaged connectors, or repair damaged wires. Step 1. Using wiring diagram (FO-1), check electrical connectors at TB4 and individual wires for tightness and continuity. Tighten, repair or replace as indicated. Step 2. Check operation of fan motor relay (K4). Test relay (See para.  4-49).  Replace relay if defective. Step 3. Check operation of fan motor (B2). Test motor  (See para.  4-25).  Repair or replace as needed. Step 4. Check operation of fan motor (B4). Test motor  (See para.  4-25).  Repair or replace as needed. Step 5. Check operation of mode selector switch (S1). Test switch  (See para.  4-41).  Replace if defective. 4-58

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