Carrier VECTOR 1550 Series Operation & Service Manual

62-61753-21 8-28Replacing Blower Assembly17654321. Screws2. Cover plate3. Blower housing4. Evaporator fan5. Motor Mount6. Screw driver7. ScrewsFigure 8-22. Evaporator Fan Boltsa. Working from the outside of the trailer, remove the 4screws (item 1 Figure 8-21). Leave cover plate(item 2) in place.b. Working inside the trailer, remove access grill, backpanel and fan guard.c. The evaporator blower assembly (item 4, wheel andmotor) is an integral part of the blower housing (item3). Unscrew the 4 screws (item 7) and remove bothparts (blower assembly and housing) from the pod.d. Remove blower assembly from housing.e. Replace blower assembly parts as required.f. Install blower assembly into blower housing. Installblower assembly and housing back into the pod.g. Working outside the trailer use a screwdriver (item6) to align the mounting holes in the motor mount(item 5) and cover plate.h. Install screws (item 1). Start with two screws, re-move screwdriver and finish assembly with the lasttwo screws.i. Check that fan does not touch ring of the blowerhousing.j. Complete the assembly in reverse order of removal.8.7.3 Condenser Fan & Motor AssembliesThe condenser fans pull air through the condenser coiland discharge over the engine. To replace fan andmotor assembly components:a. Open the front doorsb. Disconnect wiring. Loosen securing bolts and allowfan and motor assembly to drop onto guide rails.c. Slide fan and motor assembly out of unit and re-place components as required.d. Install the condenser fan assembly in reverse orderof removal.8.7.4 Battery Charger(s)DescriptionThe battery charger (Item 2, Figure 2-2) is a solid statedevice which converts the AC power, from the genera-tor or standby power source, to 12 Vdc.Checking Battery ChargerNOTEThe battery must be in good condition beforedoing the following test.a. Run the unit with the battery charger connected asusual.NOTEIf there is no load connected at the VDC out-put, the battery charger will not deliver voltage.b. Measure current on the +12 VDC output of the bat-tery charger. If current is between 3 and 21 Ampsthe battery charger is functioning correctly.c. If Amps = 0 check the battery charger input AC volt-age. It must be between 350 and 670 Volts.d. If there is no AC voltage, stop the unit and, if re-quired, disconnect the standby plug. Check the highvoltage 3-position connector and the 12 VDC two-position connections.e. If connections are good, replace battery charger.8.7.5 GeneratorDescriptionDriven by the diesel engine, the generator delivers ACpower to the compressor, condenser fan motors,evaporator fan motors and the battery charger.When the unit is in heating or defrost mode, the gen-erator also delivers AC power to the evaporator coiland drain pan mounted heater rods.Preventive Maintenance & Operating PrecautionsCostly repairs and down time can usually be preventedby operating electrical equipment under conditionswhich are compatible with those for which the equip-ment was designed. Follow the instructions outlinedbelow to ensure maximum efficiency of the electricalequipment.