TM 9--2350--292--20--10027 00--1AUXILIARY POWER UNIT HIGH AIR TEMPERATURE LIGHT IS ILLUMINATEDAND DOOR FAN IS NOT RUNNING.0027 00THIS WORK PACKAGE COVERS:Auxiliary Power Unit High Air Temperature Light Is Illuminated And Door Fan Is Not RunningINITIAL SETUP:Tools and Special ToolsGeneral mechanic’s tool kit (item 1, WP 0717 00)Multimeter (item 84, WP 0717 00)MaterialsAdhesive (item 25, WP 0716 00)Equipment ConditionsVehicle MASTER switch OFF (TM 9--2350--292--10)APU cover removed (WP 0413 00)Personnel RequiredTwonoyesACONTINUED ON NEXT PAGEWARNINGRemove rings, bracelets, wristwatches,and neck chains before working on anyvehicle. Jewelry can catch on equip-ment and cause injury, or may shortacross an electrical circuit and causesevere burns or electrical shock.Replace door fanthermostatic switch S2(WP 0660 00). Verifythat fault is corrected.NOTEThe high air temperature switch isnormally open and set to close ontemperature rise of 446_F +18_.If oil temperature rises above 200_F,the APU engine oil and oil filter mustbe replaced (WP 0597 00).NOTERemove sealant from electrical terminals toensure good contact for multimeter leads. Applyadhesive to all exposed terminals aftertroubleshooting is complete.1. Disconnect harness 3W730 lead 233B andground wire from door fan thermostatic switchS2.2. Turn MASTER switch ON (TM 9--2350--292--10).3. Place a jumper wire between harness 3W730lead 233B and ground wire.4. Turn FUEL SHUTOFF switch ON(TM 9--2350--292--10).5. Observe door fan.6. Turn FUEL SHUTOFF and MASTER switchesOFF.Does door fan run?
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