Carrier CAPRI-280 Operation And Service Manual Download

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Model
CAPRI-280
Septa

T-283

Bus Air
Conditioning
Equipment

Summary of Contents for CAPRI-280

Page 1: ...Model CAPRI 280 Septa T 283 Bus Air Conditioning Equipment...

Page 2: ...VICE MANUAL OPERATION AND Model CAPRI 280 BUS AIR CONDITIONING UNIT Septa Carrier Transicold Division Carrier Corporation P O Box 4805 Syracuse N Y 13221 Carrier Corporation 1997 D Printed in U S A 10...

Page 3: ...e 1 9 2 OPERATION 2 1 2 1 Starting Stopping and Operating Instructions 2 1 2 1 1 HVAC Power to Controller 2 1 2 1 1 Starting 2 1 2 1 3 Self Test and Diagnostics Check for Errors and or Alarms 2 1 2 1...

Page 4: ...l Charge 4 3 4 7 3 Adding Partial Charge 4 4 4 8 Checking For Noncondensibles 4 4 4 9 Checking And Replacing High Pressure Cutout Switch 4 4 4 9 1 Checking High Pressure Switch 4 4 4 9 2 Replacing Hig...

Page 5: ...ermostatic Expansion Valve 4 5 4 5 Thermostatic Expansion Valve Bulb and Thermocouple 4 5 4 6 Removing Bypass Piston Plug 4 7 4 7 Model O5G Compressor 4 7 5 1 Electrical Wiring Schematic Diagram 5 2 L...

Page 6: ...y is disconnected Always work in pairs Never work on the equipment alone In case of severe vibration or unusual noise stop the unit and investigate MAINTENANCE PRECAUTIONS Beware of unannounced starti...

Page 7: ...itioning and heatingequipment interfaces with electrical cabling refrigerant piping engine coolant piping for heating ductwork and other components furnished by the bus manufacturer to complete the sy...

Page 8: ...gh refrigerant temperatures The main liquid line solenoid valve closes when system is shut down toprevent floodingof coilswith liquid refrigerant and to isolate the filter drier for servicing when the...

Page 9: ...fans circulate the air over the coils The air filters filter dirt particles from the air before the air passes over the coils The thermal expansion valves meter the flow of refrigerant entering the e...

Page 10: ...adjustable 10 to 12_F MOP Setting Nonadjustable 55 4 psig 375 28 5 kPa d High Pressure Switch HPS for R 134a Units Opens at 300 10 psig Closes at 200 10 psig 1 4 ELECTRICAL SPECIFICATIONS ECDC MOTORS...

Page 11: ...iver filter drier thermostatic expansion valves liquid line solenoid valve and evaporator coils The compressor raises the pressure and the temperature of the refrigerant and forces it into the condens...

Page 12: ...ater pumps The controller automatically controls the heat valves during heating and reheat cycles to maintain required temperatures inside the bus Engine coolant glycol solution is circulated through...

Page 13: ...Amp CB 4 Evaporator fan 4 15 Amp CB 5 Evaporator fan 5 15 Amp CB 6 Evaporator fan 6 15 Amp CB 7 Condenser fan 1 15 Amp CB 8 Condenser fan 2 15 Amp CB 9 Condenser fan 3 15 Amp CB10 Condenser fan 4 15...

Page 14: ...s J4 Interlock Inputs WTS low side pressure switch etc J5 Relay board interface J6 Sensor inputs Thermistors etc J7 Diagnostics interface RS232 DB9 D2 Blinks once per second in normal operation On ste...

Page 15: ...6 7 8 9 10 11 Figure 1 7 Diagnostic Module 1 Display 2 Down decrease selection 3 Up increase selection 4 Ventilation 5 Auto Control Selection 6 Air Conditioning 7 Heating 8 Fan Speed Selection 9 Not...

Page 16: ...indicated through the code LED or on the diagnostic tool display If an alarm condition exists diagnostics can be manually initiated to isolate system fault s by simultaneously pressing the up and down...

Page 17: ...2 2 T 283 Cool High Speed Loaded Cool High Speed 4 Cylinders Cool High Speed 2 Cylinders Reheat High Speed 2 Cylinders Heat Low Speed Heat High Speed Figure 2 1 Auto Reheat Mode...

Page 18: ...re decreases below 26 psig the first unloader is energized unloading the first compressor cylinder bank two cylinders this output will remain energized until the pressure increases to above 34 psig 2...

Page 19: ...ystem failure if there has not been an opportunity to approve the changes a Turn the A C main switch located in the driver s area to OFF b Connect the MDST to the service port located in the return ai...

Page 20: ...the clutch output is energized P6 Discharge Pressure This value is the discharge pressure measured by the discharge pressure transducer If the sensor is shorted it will display CL and if it is open ci...

Page 21: ...zed P23 Evaporator Hours Low This is the number in hundreds tens and ones of hours of operation with the evaporator fans energized P24 Maintenance 1 Hour High This is the value of compressor hours hig...

Page 22: ...m is active and I indicates that the alarm is inactive If the auto key is pressed the display will scroll through the three digit hour meter readings If multiple alarms are present the user can scroll...

Page 23: ...Check sensor voltage or wiring Replace sensor or repair wiring One unloader is energized 17 Low Pressure Shutdown Low suction pressure switch open or wiring defective Check cause of low suc tion press...

Page 24: ...fail output is ener gized 26 Not used 31 Maintenance Alarm 1 The compressor hour meter is greater than the value in Maintenance Hour Meter 1 Reset the maintenance hour meter Alarm will be generated 3...

Page 25: ...3 5 Heating system Heat valve stuck open p 3 5 ABNORMAL PRESSURES High discharge pressure Discharge transducer failure Refrigerant overcharge Noncondensable in system Condenser motor failure Condenser...

Page 26: ...ace 1 6 Check EXPANSION VALVE MALFUNCTION Low suction pressure with high superheat Low refrigerant charge Wax oil or dirt plugging valve orifice Ice formation at valve seat Power assembly failure Loss...

Page 27: ...pressor are equipped with mating flanges for connection to flanges on the compressor These valves are provided with a double seat and a gauge connection which allows servicing of the compressor and re...

Page 28: ...to 1 2 turns 4 4 PUMPING THE SYSTEM DOWN OR REMOVING THE REFRIGERANT CHARGE NOTE To avoid damage to the earth s ozone layer usea refrigerant recovery system whenever removing refrigerant 4 4 1 System...

Page 29: ...use heater blankets heat lamps or alternate sources of heat to raise system temperature c Procedure for Evacuation and Dehydrating System 1 Remove refrigerant using a refrigerant recovery system 2 Th...

Page 30: ...g is 3 psig 21 kPa or more than the calculated P T pressure in step d noncondensibles are present f Remove refrigerant using a refrigerant recovery system g Evacuate and dehydrate the system Refer to...

Page 31: ...ng surfaces NOTE Do not adjust the new replacement expansion valve Valves are preset at the factory 7 Using new gaskets install new cage and power head assemblies provided with repair kit 8 The therma...

Page 32: ...will change superheat setting by 1_F 0 56_C 3 Check clean and remove any foreign material from the valve body valve seat and mating surfaces 4 Reinstall power head and cage assemblies using new gasket...

Page 33: ...ottom Plate 7 Oil Drain Plug 8 Oil Level Sight Glass 9 Oil Pump 10 O ring 11 Discharge Service Valve 12 Service Port Figure 4 7 Model O5G Compressor 1 2 3 4 5 6 7 8 9 10 11 12 4 12 2 Compressor Oil Le...

Page 34: ...il must be removed from the compressor by performing the following procedure If lowest oil level visible is below Min indication oil must be added to the compressor by following the procedure in secti...

Page 35: ...2 181 290 3 308 65 1 103 180 2 230 295 3 357 70 1 152 185 2 279 300 2 406 75 1 204 190 2 328 305 3 455 80 1 250 195 2 377 310 3 504 85 1 299 200 2 426 315 3 553 90 1 348 205 2 475 320 3 602 95 1 397...

Page 36: ...eat cycle configuration is removed the unit is in reheat mode The default configuration is cycle clutch mode REMOVED E Transducers When the transducer configuration is removed trans ducers will assume...

Page 37: ...5 0 26 0 26 70 21 71 1 490 2 5 00 4 90 4 20 4 6 31 7 0 32 0 32 75 24 78 7 542 6 5 53 5 43 2 19 5 6 36 6 0 39 0 39 80 27 86 7 597 8 6 10 5 98 0 18 6 5 44 8 0 46 0 45 85 29 95 3 657 1 6 70 6 57 2 17 7...

Page 38: ...5 1 SECTION 5 ELECTRICAL Figure 5 1 INTRODUCTION This section includes electrical wiring schematics The schematic shown in this section is for R 134a refrigerant systems...

Page 39: ...5 2 Figure 5 1 Electrical Wiring Schematic Diagram Drawing No 62 10112 00 Sheet 1 of 3...

Page 40: ...5 3 Figure 5 1 Electrical Wiring Schematic Diagram Drawing No 62 10112 00 Sheet 2 of 3...

Page 41: ...5 4 Figure 5 1 Electrical Wiring Schematic Diagram Drawing No 62 10112 00 Sheet 3 of 3...

Page 42: ...sor 1 1 3 4 compressor 1 4 1 5 Compressor Clutch Control 3 Compressor Oil Level 4 7 Compressor Unloader 3 Compressor Unloader Control 3 Compressor will not run 3 4 condensate drain connections 1 3 Con...

Page 43: ...nsion Valve Malfunction 3 5 F Filter drier 1 2 1 5 4 5 Filter drier 4 5 Fuses 1 5 G Gas Hose 1 2 General System Troubleshooting Procedures 3 4 H heat valve 1 3 Heater Flow Cycle 1 6 Heating 3 heating...

Page 44: ...1 Pumping The System Down 4 2 R receiver 1 2 1 5 Receiver Tank 1 2 Receiver Tank Support 1 2 Refrigerant Leak Check 4 2 Refrigeration Charge 1 4 Refrigeration Cycle Diagram 1 6 Refrigeration system 3...

Page 45: ...re Sensor Checkout 4 8 Thermal Circuit Breakers 1 7 thermal expansion valves TXV 1 3 Thermal Switches 1 4 Thermostatic Expansion Valve 1 4 Thermostatic Expansion Valve 4 5 Transducers 1 4 4 10 Trouble...

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Carrier CAPRI-280, Operation And Service Manual

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