Manuals / Carrier / Household Appliance / Air Conditioner

Carrier 48/50AJ specifications 102

Models: 48/50AJ

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RED JUMPER WIRE MUST BE ADDED

BETWEEN R AND W1 FOR UNITS

EQUIPPED WITH HEAT IN NON-THERMOSTAT

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Fig. 15 — Typical Main Control Box Wiring Schematic (48/50AJ,AK,AW,AY Units)

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Carrier 48/50AJ specifications 102

Contents

Controls, Start-Up, Operation, Service and Troubleshooting ContentsContents Safety ConsiderationsSeries Product Line GeneralBasic Control Usage Sents pressing Enter to move into the next levelScrolling Marquee System Pilot User Interface Test START-UP Fan Performance 48AJ,AK020,025 and 48A2,A3020 Units Fan Performance 48AJ,AK027,030 and 48A2,A3025-030 UnitsFan Performance 48AJ,AK,A2,A3035 Units Fan Performance 48AJ,AK036 UnitsFan Performance 48AJ,AK,A2,A3040 Units Fan Performance 48AJ,AK041 UnitsFan Performance 48AJ,AK,A2,A3050 Units Fan Performance 48AJ,AK051 UnitsFan Performance 48AJ,AK,A2,A3060 Units Fan Performance 50AJ,AK020,025 and 50A2,A3020 UnitsFan Performance 50AJ,AK027,030 and 50A2,A3025-030 Units Fan Performance 50AJ,AKA2,A3035 UnitsFan Performance 50AJ,AK036 Units Fan Performance 50AJ,AK,A2,A3040 UnitsFan Performance 50AJ,AK041 Units Fan Performance 50AJ,AK,A2,A3050 UnitsFan Performance 50AJ,AK051 Units Fan Performance 50AJ,AK,A2,A3060 UnitsFan Performance 48AW,AY020,025 and 48A4,A5020 Units Fan Performance 48AW,AY027,030 and 48A4,A5025-030 UnitsFan Performance 48AW,AY,A4,A5035 Units Fan Performance 48AW,AY036 UnitsFan Performance 48AW,AY,A4,A5040 Units Fan Performance 48AW,AY041 UnitsFan Performance 48AW,AY,A4,A5050 Units Fan Performance 48AW,AY051 UnitsFan Performance 48AW,AY,A4,A5060 Units Fan Performance 50AW,AY020,025 and 50A4,A5020 UnitsFan Performance 50AW,AY027,030 and 50A4,A5025-030 Units Fan Performance 50AW,AY,A4,A5035 UnitsFan Performance 50AW,AY036 Units Fan Performance 50AW,AY,A4,A5040 UnitsFan Performance 50AW,AY041 Units Fan Performance 50AW,AY,A4,A5050 UnitsFan Performance 50AW,AY051 Units Fan Performance 50AW,AY,A4,A5060 UnitsMotor Limitations Air Quantity Limits 48AJ,AK,AW,AY,A2,A3,A4,A5Controls Quick Start Air Quantity Limits 50AJ,AK,AW,AY,A2,A3,A4,A5Page Service Test Indoor Air Quality IAQ OptionsService Test MLVThird Party Control Demand Controlled Ventilation ControlControls Operation Operating Modes Display Table Expansion Range CCN PointHvac TYP = 3 TSTAT-MULTI TYP = 6 SPT-2 STGUnit Configuration Expansion Range Units CCN Point DefaultsThere will be no MAT calculation Under Configuration→UNIT Machine Dependent Configurations Supply Air Reset ConfigurationSetpoints Cooling Configuration Advanced Scroll Temperature Protection Label Are VAV occupied cooling offsets under SetpointsCool Mode Evaluation Cool/Heat Set Point Offsets Configuration LV.TStage Sequence 48/50AJ,AW020-027 Stage Sequence 48/50AJ,AW030-060Stage Sequence Staging Sequence with Hot Gas Bypass 48/50AK,AY030-060 Stage Sequence 48/50A2,A4020-027Stage Sequence 48/50A2,A4030-060 Staging Sequence with Hot Gas Bypass 48/50A3,A5030-060 Run Status Mode Trip Helper PCT = MAT EDT/ C.CAPRun Status Cool Display Expansion Range Units CCN Point Write StatusControl will not attempt to learn MAT over time Inputs→GEN.I→DL.S1 Inputs→GEN.I→DL.S2Demand Limit Configuration Expansion Range Units CCN Point DefaultCondenser Fan Staging FAN Relay 48/50A Unit SizeHeating Configuration Occupied Heating Enable OC.EN This configurationExpansion Range Units CCN Default Point Ohsp UhspMode Trip Helper Table Expansion Units CCN PointUnit Size Staged Gas ConfigurationStaged Gas Heat 48AJ,AK,AW,AY Units Unit Model noStaged Gas Heat 48A2,A3,A4,A5 Units Relay Output StageLED Indication Error Code IGC LED IndicatorsHvac mode = Tempering Vent CapacityPage As an example, the static pressure reset limit SP.LM = Static Pressure Control ConfigurationFan Status Monitoring Static Pressure Reset Related Points Fan Status Monitoring ConfigurationDirty Filter Switch Points None Outdoor Enthalpy ChangeoverEconomizer Configuration Table Custom Changeover Curve ExampleTstat 2 Stage SPT Multi-StagingSPT 2 Stage Economizer Run Status Table Building Pressure Configuration Power Exhaust Staging BP.CF =PE.A PE.B PE.C PID Expansion Range CCN Write Point StatusIndoor Air Quality Control The indoor air quality Trol can also be set up to respond to a discrete IAQ input Described above when DAQ is above the DAQ Fan On SetWill be turned off when DAQ is below the DAQ Fan Off Set IQ.A.F = 2 Fan On Occupied/Unoccupied IAQIAQ Purge Configuration → IAQ → IAQ.P → IQ.PG Indoor Air Quality Configuration Dehumidification ConfigurationTemperature Compensated Start This logic is Carrier Comfort Network CCN System ItExpansion Range Units CCN Point CCN Configuration Expansion Range Units Point DefaultAlert Limit Configuration Sensor Trim ConfigurationDiscrete Switch Logic Configuration The SW.LG Display Configuration Time Clock ConfigurationSwitch Logic Configuration Remote Switch ConfigurationRemote Switch Logic Configuration OpenClosed Troubleshooting Time Clock ConfigurationCompressor Stops on High Pressure Cooling Service AnalysisProblem Solution Compressor does not RUN Compressor Cycles on LOW PressureCompressor Loses OIL Unit Operates TOO Long or ContinuouslySystem is Noisy Frosted Suction LineGas Heating Service Analysis Electric Heat Service AnalysisProblem Cause Remedy IGC Service Analysis Logic 5K Thermistor Temperature vs. Resistance SCT Sensors English 5K Thermistor Temperature vs. Resistance SCT Sensors SI 143 Pressure Voltage Psig Drop Pressure Voltage Psig Pressure Voltage Psig Drop 175 503 PCT = MAT EDT/C.CAP Auto View of Run Status Display Table Economizer Run Status Display TableExpansion Range Units Point Write Status CCN/Linkage Display Table Mode Trip Helper Display TableCooling Information Display Table Compressor Run Hours Display TableExpansion Range Units Point Write Status Tmgd Time Guard Display TableSoftware Version Numbers Display Table Expansion Range Units Point Write Status VersAlert and Alarm Codes P051CEM Check for welded contactor Verify CS wiring T122 Circuit a High Saturated Suction Temperature Page Page At Configuration→UNIT→SENS→FLT.S Factory-Installed Components Major System Components102 103 104 Typical Auxiliary Control Box Wiring Schematic 105~~~ ~~~~ 106107 108 109 110 111 112 Typical Power Schematic 48/50A2,A3,A4,A5060 Unit Shown 113Typical Controls Option Wiring Schematic 114115 Typical Small Chassis Component Location Size 020-035 Units116 Typical Large Chassis Component Locations Size 036-060 Units117 Main Control Board MBB Inputs and Outputs 118Economizer Control Board ECB1 Inputs and Outputs 119VAV Control Board ECB2 Inputs and Outputs 120Outputs Sfanvfd Staged Gas Control Board SCB Inputs and Outputs 121Controls Expansion Board CEM Inputs IGC Board Inputs and Outputs122 123 Terminal FunctionW2 G 124Board SW1 SW2 SW3 SW4 ECB1 ECB2 SCB CEM Field Connection Terminal Strips 125126 IME127 CIDHvac Service 128Gas Heat Section Details Lubrication Manufacturer LubricantEvaporator-Fan Motor Replacement Evaporator Fan Service and ReplacementBelt Tension Adjustment To adjust belt tension 131132 Condenser-Fan AdjustmentRound Tube, Plate Fin Unit Charge Unit Refrigerant Size LiquidCharging Chart 48/50A2,A3,A4,A5020 with R-410A Refrigerant 13327 Ton Mchx Circuit a Charging Chart 134Charging Chart 48/50A2,A3,A4,A5030 with R-410A Refrigerant 135Charging Chart 48/50A2,A3,A4,A5035 with R-410A Refrigerant 136Charging Chart 48/50A2,A3,A4,A5040 with R-410A Refrigerant Charging Chart 48/50A2,A3,A4,A5050 with R-410A RefrigerantCharging Chart 48/50A2,A3,A4,A5060 with R-410A Refrigerant 138Gas Valve Part Number EF33CW271 Main Burner RemovalMode RUN Status 140Appendix a Local Display Tables 141Description Range Units CCN Point Default 142Mode Inputs 143Mode Configuration 144145 →BP.SP146 →SC.OV→SPT.OMode Time Clock 147Appendix B CCN Tables 148Appendix B CCN Tables Status Display Tables149 Tstat 150Display Name Range Units Point Name Write Status Temps Uinputs151 Name Range Units Point Name Default Allm Config TablesName Range Units Point Name Default Schedovr 152SERVICE-CONFIG Tables 153Name Range Units Point Name Default Heat 154Trim Name Range Units Point Name Default Swlg 155156 Display Name Range Units Point Name Write Status ALARMS01ALARMS02 ALARMS03 ALARMS04 ALARMS05 Compresr DmandlimDisplay Name Range Units Point Name Write Status Econmin Maintenance Display Tables157 Ecdiag158 159 160 Appendix C VFD Information Table a VFD Terminal Designations161 Table B VFD Configurations Appendix C VFD InformationOver Ride Fig. C Standard Display Example Appendix C VFD Information Appendix C VFD Information Table C Fault Codes 166Table E Maintenance Intervals Table D Alarm CodesReplace the cooling fan Restore power 167Fig. D Main Fan Replacement Frame Sizes R1-R4 Fig. F Internal Enclosure Fan Replacement 169Appendix D Mode Selection Process Appendix E UPC Open Controller 171172 Table a SW3 Protocol Switch Settings For MS/TPTable B Baud Selection Table DS8 DS7 DS6 DS5 DS4 DS3Table C MS/TP Wiring Recommendations Appendix E UPC Open Controller173 Rmcorp Wiring Specifications Recommended Vendors and Part Numbers174 CMP175 Table E LED Status IndicatorsRUN LED Error LED Status LED Status176 Bacnet Point Name Read Units Default Range Object IDNetwork Points List Object Name PointAppendix E UPC Open Controller Network Points List 177178 Bacnet Point Name Read Units Default Range Object ID Only 179180 181 182 Index 183Copyright 2010 Carrier Corporation Controls SET Point and Configuration LOG Expansion Range Default EntryCL-2 CL-3 CL-4 CL-5 Unit START-UP Checklist PRE-START-UP