TM 55-1945-205-24-20034 00 10034 00UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCEROLL-ON/ROLL-OFF DISCHARGE FACILITYHEATING AND AIR CONDITIONING SYSTEMTROUBLESHOOTING PROCEDURESINITIAL SETUP:Test EquipmentMultimeter (Item 43, WP 0359 00)Personnel RequiredEngineer 88LUtilities Equipment Repairer 52CReferencesTM 55-1945-205-10-2TROUBLESHOOTING 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 0348 00)Perform operational check on heating and air conditioning system. (TM 55-1945-205-10-2)MALFUNCTIONBroken wires to the fan motor are present.CORRECTIVE ACTIONRepair/replace wiring as necessary. (WP 0348 00)Perform operational check on heating and air conditioning system. (TM 55-1945-205-10-2)MALFUNCTIONFan motor is wired incorrectly.
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