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Carrier 48/50PD05 manual Major System Components, General, sections below

Models: 48/50PD05

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48/50PD

Table 18 — Pressure (psig) vs. Voltage Drop Values for Suction Pressure Transducers

PRESSURE	VOLTAGE		PRESSURE	VOLTAGE		PRESSURE	VOLTAGE		PRESSURE	VOLTAGE
(psig)	DROP (V)		(psig)	DROP (V)		(psig)	DROP (V)		(psig)	DROP (V)
0	0.465		68	1.135		136	1.804		204	2.474
2	0.485		70	1.154		138	1.824		206	2.493
4	0.505		72	1.174		140	1.844		208	2.513
6	0.524		74	1.194		142	1.863		210	2.533
8	0.544		76	1.214		144	1.883		212	2.553
10	0.564		78	1.233		146	1.903		214	2.572
12	0.583		80	1.253		148	1.922		216	2.592
14	0.603		82	1.273		150	1.942		218	2.612
16	0.623		84	1.292		152	1.962		220	2.631
18	0.642		86	1.312		154	1.982		222	2.651
20	0.662		88	1.332		156	2.001		224	2.671
22	0.682		90	1.351		158	2.021		226	2.690
24	0.702		92	1.371		160	2.041		228	2.710
26	0.721		94	1.391		162	2.060		230	2.730
28	0.741		96	1.410		164	2.080		232	2.749
30	0.761		98	1.430		166	2.100		234	2.769
32	0.780		100	1.450		168	2.119		236	2.789
34	0.800		102	1.470		170	2.139		238	2.809
36	0.820		104	1.489		172	2.159		240	2.828
38	0.839		106	1.509		174	2.178		242	2.848
40	0.859		108	1.529		176	2.198		244	2.868
42	0.879		110	1.548		178	2.218		246	2.887
44	0.898		112	1.568		180	2.237		248	2.907
46	0.918		114	1.588		182	2.257		250	2.927
48	0.938		116	1.607		184	2.277		252	2.946
50	0.958		118	1.627		186	2.297		254	2.966
52	0.977		120	1.647		188	2.316		256	2.986
54	0.997		122	1.666		190	2.336		258	3.005
56	1.017		124	1.686		192	2.356		260	3.025
58	1.036		126	1.706		194	2.375		262	3.045
60	1.056		128	1.726		196	2.395		264	3.065
62	1.076		130	1.745		198	2.415		266	3.084
64	1.095		132	1.765		200	2.434		268	3.104
66	1.115		134	1.785		202	2.454		270	3.124

MAJOR SYSTEM COMPONENTS

General

The 48/50PD single package rooftop units contain the ComfortLink™ electronic control system that monitors all operations of the rooftop. The control system is composed of several main control components and available factory-installed

options or field-installed accessories as listed in	sections below.
See Fig. 12-14 for the control and power	schematics for

48/50PD. Fig. 15 shows the layout of the control box, unit, and thermistor and transducer locations for the 48/50PD.

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Carrier 48/50PD05 manual Major System Components, General, sections below

Contents

Troubleshooting Instructions TABLE OF CONTENTSControls, Start-Up,Operation, Service and Single Package Displacement VentilationUNIT DAMAGE HAZARD SAFETY CONSIDERATIONSELECTRICAL SHOCK HAZARD FIRE, EXPLOSION HAZARDBASIC CONTROL USAGE Accessory Navigator DisplayGENERAL ComfortLink ControlSystem Pilott and Touch Pilot Devices CCN Tables and DisplayConventions Used in This Manual Refrigerant Service PortsSTART-UP Unit PreparationEvaporator Fan Power SupplyInternal Wiring Condenser Fans and MotorsCONTROLS QUICK SET-UP Accessory InstallationControl Set Point and Configuration Log Orifice Change 48PD OnlyIAQ Switch AccessoriesPower Exhaust CCN CommunicationFan Status Filter StatusIndependent Outputs SERVICE TESTProgramming Operating Schedules Fan TestTHIRD PARTY CONTROL Alarm OutputDisplay Configuration CONTROLS OPERATIONService Password PSWD Unit ConfigurationPassword Enable PROT Remote HVAC Mode Disabled HV.DNOccupancy Determination Space Humidity Switch RH.SWGeneral Operating Sequence RH Sensor On OAQ Input RH.SCompressor Operation Indoor Fan OperationSetpoints→UHSP Unoccupied Free Cooling Outdoor Fan OperationEconomizer Operation Table 6 — Fan Level Control of Outdoor FanIAQ Analog Input Indoor Air Quality IAQPower Exhaust IA.CF = 0 No IAQCooling Modes Cooling Supply Air Set Point Reset Fig. 6 - Cooling Speed Demand WindowFig. 7 - Cool Supply Air Set Point Fig. 8 - Economizer Minimum Position For all units with EconomizersFor units with Enthalpy Control Ventilation ModeHeating Modes Supply-AirTemperature Sensor SAT Gas Heat Start-UpTemp Comp Strt Cool Factr TCS.C Setting Up the SystemTemperature Compensated Start Temp Comp Strt Heat Factr TCS.HDemand Limit Carrier Comfort Network CCNR ConfigurationSPT Override Enabled? SCH.O→OV.SP Temperature Compensated Start LogicRestart Procedure TROUBLESHOOTINGAlarm Handling CCN Alarm BroadcastDiagnostic Alarm Codes and Possible Causes Alarms and AlertsViewing and Clearing Unit Alarms Communication FailuresAlert Code T076 - Return Air Thermistor Failure Alert Code A157 - A/D Hardware Failure Alert Code T415 - IAQ Input Out of Range Alert Code T416 - OAQ Input Out of RangeTable 8 — ComfortLink Alarm Codes 48/50PDCooling Troubleshooting Table 8 — ComfortLink Alarm Codes contDigital Scroll Controller DSC Troubleshooting Flash Code 4 ⎯ Locked Rotor Table 10 — DSC Red LED Flash CodesEconomizer Troubleshooting Table 11 — Economizer Service AnalysisPhase Loss Protection Heating TroubleshootingVariable Frequency Drive VFD Troubleshooting Phase Reversal ProtectionLEGEND IDM -- Induced-DraftMotor Fig. 9 - IGC Service Analysis Logic48/50PD IGC --Integrated Gas Unit ControllerDESCRIPTION RESET METHOD48/50PD PROBABLE CAUSERefrigerant Temperatures Thermistor TroubleshootingAir Temperatures Thermistor/Temperature Sensor CheckTransducer Troubleshooting Forcing Inputs and OutputsSensor Trim TEMP 48/50PD TEMPDegree F 86K at 25_C ResistorsDegree C Degree C48/50PD MAJOR SYSTEM COMPONENTSGeneral sections belowFig. 12 - 48PD Control Wiring Schematic 48/50PDC08582 Fig. 13 - 50PD Control Wiring Schematic 48/50PDC08583 48/50PD C08584Fig. 15 - Typical Unit Component Arrangement 48/50PDC08657 setting Main Base Board MBBCEPL130346-01 Fig. 16 - Main Base Board MBBPOINT DESCRIPTION Table 19 - MBB Connections48/50PD SENSOR LOCATIONEconomizer Control Board ECB Fig. 17 - Economizer Control Board ECBDISPLAY Table 20 — ECB Connections48/50PD POINT DESCRIPTIONModulation Board AUX1 Fig. 18 - Modulation Board AUX1Table 21 — AUX1 Connections Digital Scroll Control Board DSC Variable Frequency Drive VFD Fig. 20 - Variable Frequency Drive VFDIntegrated Gas Control IGC Board Fig. 21 - Integrated Gas Control IGC BoardLow Voltage Terminal Strip Scrolling Marquee Display Accessory Navigatort DisplayField-InstalledAccessories Carrier Comfort Network CCNR InterfaceSpace Temperature Sensor T-58 Space Temperature Sensor AveragingFig. 25 - CCN System Architecture LEGEND Factory WiringField Wiring Terminal BlockTwo-PositionDamper SERVICECarrier Accessory Kits Indoor Air QualityCleaning Coil Maintenance and Cleaning RecommendationOutdoor-AirInlet Screens Condensate Drain PanFilters Main Burner 48PDLubrication Evaporator Fan Service and ReplacementEvaporator Fan Performance Adjustment CompressorsCondenser-FanAdjustment Evaporator Fan Belt Tension AdjustmentVariable Frequency Drive VFD Replacement Fig. 31 - Evaporator-FanAlignment and AdjustmentVerify Sensor Performance Economizer Operation During Power FailureTo Use the Cooling Charging Chart EvacuationGas Valve Adjustment PuronR RefrigerantMain Burners Cleaning and AdjustmentHigh Altitude Filter DrierRelief Devices Replacement PartsDiagnostic LEDs Compressor Sound ShieldAPPENDIX A - LOCAL DISPLAY AND CCN TABLES Table 27 - MODE - RUN STATUS48/50PD APPENDIX A - LOCAL DISPLAY AND CCN TABLES CONT Table 27 — MODE - RUN STATUS cont48/50PD Table 29 — MODE - TEMPERATURES Table 28 — MODE - SERVICE TESTAPPENDIX A - LOCAL DISPLAY AND CCN TABLES CONT Table 30 — MODE - PRESSURESTable 32 — MODE - INPUTS APPENDIX A - LOCAL DISPLAY AND CCN TABLES CONTTable 31 — MODE - SET POINTS 48/50PDAPPENDIX A - LOCAL DISPLAY AND CCN TABLES CONT Table 33 — MODE - OUTPUTS48/50PD Table 34 — MODE - CONFIGURATION APPENDIX A - LOCAL DISPLAY AND CCN TABLES CONT48/50PD Table 34 — MODE - CONFIGURATION cont APPENDIX A - LOCAL DISPLAY AND CCN TABLES CONT48/50PD APPENDIX A - LOCAL DISPLAY AND CCN TABLES CONT 48/50PDITEM APPENDIX A - LOCAL DISPLAY AND CCN TABLES CONT 48/50PDITEM Table 36 - CCN ONLY TABLES APPENDIX A - LOCAL DISPLAY AND CCN TABLES CONTTable 35 — MODE - TIME CLOCK 48/50PDAPPENDIX A - LOCAL DISPLAY AND CCN TABLES CONT Table 37 — MODE - OPERATING MODES48/50PD APPENDIX A - LOCAL DISPLAY AND CCN TABLES CONT Table 37 — MODE - OPERATING MODES cont48/50PD Table 37 — MODE - OPERATING MODES cont Table 38 — MODE - ALARMSAPPENDIX A - LOCAL DISPLAY AND CCN TABLES CONT 48/50PDAPPENDIX B - VFD INFORMATION 0-10VdcAPPENDIX B - VFD INFORMATION CONT Table 40 — VFD CONFIGURATIONS48/50PD Start Up with Assistant VFD OperationVFD Modes Start Up by Changing Parameters IndividuallyStart-UpAssistant Mode Drive Parameter Backup ModeParameters Mode Changed Parameters ModeFaults Red LED Lit VFD DiagnosticsI/O Settings Mode Alarms Green LED FlashingHistory VFD MaintenanceCorrecting Alarms Heat SinkTable 41 — FAULT CODES APPENDIX B - VFD INFORMATION CONT48/50PD Table 41 — FAULT CODES cont APPENDIX B - VFD INFORMATION CONT48/50PD APPENDIX B - VFD INFORMATION CONT Table 42 — ALARM CODESTable 43 — MAINTENANCE INTERVALS 48/50PDBattery Replacement Main Fan ReplacementControl Panel Cleaning 3 3 2APPENDIX C - START-UPDATA AIRFLOW AIRFLOW Page LEGEND Bhp -- Brake HorsepowerBhp -- Brake Horsepower 1. Maximum continuous BHP isAIRFLOW AIRFLOWAIRFLOW AIRFLOW48/50PD 48/50PD Bhp -- Brake HorsepowerBhp -- Brake Horsepower LEGENDGENERAL NOTES FOR FAN PERFORMANCE DATA TABLES APPENDIX D - ADDITIONAL START-UPDATA CONTROL SET POINT AND CONFIGURATION LOG INDICATE UNIT SETTINGS BELOWTable 65 — MODE - CONFIGURATION Table 65 — MODE - CONFIGURATION cont 48/50PDTable 65 — MODE - CONFIGURATION cont 48/50PDTable 65 - MODE - CONFIGURATION cont 48/50PDII.START-UP UNIT START-UPCHECKLISTI. PRE-START-UP ELECTRICALPrinted in U.S.A 48/50PDCatalog No:48-50PD-01T Edition Date 3/09