TM 55-1945-205-24-40034 00 10034 00UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCEFLOATING CAUSEWAYHEATING AND AIR CONDITIONING SYSTEMTROUBLESHOOTING PROCEDURESINITIAL SETUP:Test EquipmentMultimeter (Item 30, WP 0253 00)Personnel RequiredEngineer 88LReferencesTM 55-1945-205-10-4TROUBLESHOOTING PROCEDUREFAN MOTOR HUMS, BUT DOES NOT STARTSYMPTOMFan motor will hum, but does not start.MALFUNCTIONLow line voltage to the fan motor is present.CORRECTIVE ACTIONUsing multimeter, check continuity of the wiring between fan motor black wire and other fan motor wires. If continuity is not present, repair/replace wiring as necessary. (WP 0246 00, WP 0248 00)Perform operational check on heating and air conditioning system.(TM 55-1945-205-10-4)MALFUNCTIONBroken wires to the fan motor are present.CORRECTIVE ACTIONRepair/replace wiring as necessary. (WP 0248 00)Perform operational check on heating and air conditioning system. (TM 55-1945-205-10-4)
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