AirComm Corporation Cessna Citation 500 501 Maintenance Manual
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Page 11
Products, Inc
Maintenance Manual
21-50-00
May 15/95
Page 2
Two evaporator/blower units are located in the aft cabin at the spar (at floor level)
within the aircraft interior. They provide cooling airflow for the cabin and cockpit
areas of the interior. The left evaporator is ducted to provide cooling airflow to the
flight crew through a floor mounted air outlet or through dedicated ducting at the
pilots and co- pilots control stick. The right evaporator is ducted to provide...
Page 12
Products, Inc
Maintenance Manual
21-50-00
May 15/95
Page 3
Figure 1. Air Conditioning System General Arrangement
Page 13
Products, Inc Maintenance Manual 21-50-01 May 15-95 Page 1 ELECTRICAL DESCRIPTION AND OPERATION 1. GENERAL The air conditioning system consists of one high energy compressor/condenser drive motor and two centrifugal evaporator blowers. The system is controlled by a mode switch with Air Conditioning Off and Fan Only position. Each evaporator has a high and low position switch. A blue indicator light will illuminate whenever the compressor/condenser is selected. The system...
Page 14
Products, Inc Maintenance Manual 21-50-01 May 15/95 Page 101 TROUBLESHOOTING 1. GENERAL The following procedures are used for troubleshooting the electrical system and the electrical interfaces with the other assemblies of the air conditioning system. 2. TOOLS AND EQUIPMENT Designation Ref. No. Qty Remarks Service Pressure Gauge Comm. Avail. 1 None Multi-meter Comm. Avail. 1 None 28vdc Source A/R None 3. ELECTRICAL TROUBLESHOOTING...
Page 15
Products, Inc Maintenance Manual 21-50-01 May 15/95 Page 102 7. Check for power at motor . If power is present, proceed to step 8. If power is not present on either pin and load/shed conditions of step 4 are met, check power on the load shed unit at connector Pin 1. If power is present, system problem exists in load shed system start unit. If power is not present, check 15 amp CB (4) and mode switch (6). 8. Fault is isolated to compressor/condenser motor. Unit should be...
Page 16
Products, Inc Maintenance Manual 21-50-01 May 15/95 Page 103 5. Remove blower assy from aircraft. Remove the four screws attaching the motor to the housing. Using a 1/8 allen wrench remove blower wheel ( use extreme care not to bend blower wheel). Cut power wires at splice and remove Gnd wire from GND terminal. Install new motor in reverse order. E. Right Evaporator Blower will not operate in the low speed setting. 1. Connect ground power to aircraft. 2. Select air...
Page 17
Products, Inc Maintenance Manual 21-50-01 May 15/95 Page 1001 Figure 1. Electrical System
Page 18
Products, Inc Maintenance Manual 21-50-01 May 15/95 Page 1002 FIG. ITEM PART NUMBER NOMENCLATURE EFFECT UNITS PER ASSY 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 82-75-103 JBS5005-2 MS25361-100 MS3320-15 ES57016-6 ES57016-5 ES57016-3 JBS275-2 JBS13001-1 ES32036-1 JBS11001-1 ES50162-1 MS25036-106 MS25036-156 MS25036-125 Electrical Installation Compressor/Condenser Circuit...
Page 19
Products, Inc Maintenance Manual 21-50-01 May 15/95 Page 1003 FIG. ITEM PART NUMBER NOMENCLATURE EFFECT UNITS PER ASSY 16 17 18 19 20 21 22 23 24 25 MS25036-123 MS25036-157 MS25181-2 ES58161-15 84-00-07-8 ES53010-3 MS25036-108 MS25036-101 MS25036-124 ES55077-2 Terminal Terminal Connector, Butt Diode Load Shed Assy Connector Terminal Terminal Terminal Terminal...
Page 20
Products, Inc Maintenance Manual 21-50-02 May 15/95 Page 1 PLUMBING DESCRIPTION AND OPERATION 1. GENERAL The plumbing system consists of a flexible nylon lined refrigerant hose with permanent swaged on fittings. All connections are tube O-ring type with sealant on the fitting mating surfaces to ensure leak free operation. Hose, O-ring material, and sealant are specially designed to work with refrigerant R134a and polyol ester oils. Two service valves are located near...