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Carrier 38AUZ appendix Catalog No 38AU-01SI, Edition Date 03/09, Replaces NEW

Models: 38AUZ

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Copyright 2009 Carrier Corp • 7310 W. Morris St. • Indianapolis, IN 46231	Printed in U.S.A.	Edition Date: 03/09	Catalog No: 38AU-01SI

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.			Replaces: NEW

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Carrier 38AUZ appendix Catalog No 38AU-01SI, Edition Date 03/09, Replaces NEW

Contents

Installation, Start-Upand Service Instructions CONTENTSSAFETY CONSIDERATIONS 38AUZInstallation INSTALLATION GUIDELINEReplacement /Retrofit - R22 to Puron UNIT OPERATION AND SAFETY HAZARDFig. 1 - 38AUZ*07-14Unit Dimensions UNIT SIZE 38AU UNIT SIZE 38AU 0 A 0 A 3 8 A UZ A 0 4 A Fig. 2 - Model Number NomenclatureStep 5 - Complete Refrigerant Piping Connections INSTALLATIONStep 2 - Complete Pre-InstallationChecks Jobsite SurveyINSTALL LIQUID LINE SOLENOID VALVE Optional Step 7 - Complete Electrical Connections Step 6 - Install AccessoriesField Power Supply UNIT OPERATION AND SAFETY HAZARDConvenience Outlets Units Without Factory-InstalledDisconnectUnits with Factory-InstalledDisconnect FIRE HAZARDInstalling Weatherproof Cover All Units ThermostatFull Load Amps Table 5 - Electrical Data - 38AUZ*07-1460 Hz Units Locked Rotor AmpsSystem Check PRE-START-UPSTART-UP PRELIMINARY CHECKSADVANCED SCROLL TEMPERATURE PROTECTION ASTP - Advanced Scroll Temperature Protection ASTP is a form of internal discharge temperature protection, used in 38AUZ*12 and 38AUZ*14 units, that unloads the scroll com- pressor when the internal temperature reaches approximately 300F. At this temperature, an internal bi-metaldisk valve opens and causes the scroll elements to separate, which stops compression. Suction and discharge pressures balance while the motor continues to run. The longer the compressor runs un- loaded, the longer it must cool before the bi-metaldisk resets. See Fig Fig. 18 - 38AUZ*12 Charging Chart Fig. 16 - 38AUZ*07 Charging ChartFig. 17 - 38AUZ*08 Charging Chart Fig. 19 - 38AUZ*14 Charging Chart Fig. 20 - 38AU Wiring DiagramOPERATING SEQUENCE ROUTINE SYSTEM MAINTENANCESeasonal Maintenance Base Unit ControlsInput SERVICEComfort Alert Diagnostic Module Status LED Status LED Troubleshooting InformationTable 6 - LED Status Codes Status LED DescriptionCompressor Protection LubricationField Refrigerant Access Ports NOVATION Coil Cleaning and MaintenanceRepairing NOVATION Condenser Tube Leaks Factory High-FlowAccess PortsFig. 22 - CoreMax Access Port Assembly TROUBLESHOOTINGFASTENER TORQUE VALUES SEATTROUBLESHOOTING cont APPENDIX Replaces NEW Catalog No 38AU-01SIEdition Date 03/09 OUTDOOR UNIT I. PRELIMINARY INFORMATIONII. PRE-START-UP CONTROLSCHECK INDOOR UNIT FAN SPEED AND RECORD