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Carrier 38AUZ appendix Check Indoor Unit Fan Speed And Record

Models: 38AUZ

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CHECK INDOOR UNIT FAN SPEED AND RECORD.

CHECK INDOOR UNIT FAN SPEED AND RECORD.

CHECK OUTDOOR UNIT FAN SPEED AND RECORD.

AFTER AT LEAST 10 MINUTES RUNNING TIME, RECORD THE FOLLOWING MEASUREMENTS: SUCTION PRESSURE

SUCTION LINE TEMP

LIQUID PRESSURE

LIQUID LINE TEMP

ENTERING OUTDOOR UNIT AIR TEMP

LEAVING OUTDOOR UNIT AIR TEMP

INDOOR UNIT ENTERING-AIR DB (dry bulb) TEMP

INDOOR UNIT ENTERING-AIR WB (wet bulb) TEMP

INDOOR UNIT LEAVING-AIR DB TEMP

INDOOR UNIT LEAVING-AIR WB TEMP

COMPRESSOR AMPS (L1/L2/L3)		/ /
NOTES:

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.			Pg CL-2	Replaces: NEW

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Carrier 38AUZ appendix Check Indoor Unit Fan Speed And Record

Contents

CONTENTS SAFETY CONSIDERATIONSInstallation, Start-Upand Service Instructions 38AUZINSTALLATION GUIDELINE Replacement /Retrofit - R22 to PuronInstallation UNIT OPERATION AND SAFETY HAZARDFig. 1 - 38AUZ*07-14Unit Dimensions UNIT SIZE 38AU UNIT SIZE 38AU 3 8 A U Z A 0 4 A0 A 0 A Fig. 2 - Model Number NomenclatureINSTALLATION Step 2 - Complete Pre-InstallationChecksStep 5 - Complete Refrigerant Piping Connections Jobsite SurveyINSTALL LIQUID LINE SOLENOID VALVE Optional Step 6 - Install Accessories Field Power SupplyStep 7 - Complete Electrical Connections UNIT OPERATION AND SAFETY HAZARDUnits Without Factory-InstalledDisconnect Units with Factory-InstalledDisconnectConvenience Outlets FIRE HAZARDInstalling Weatherproof Cover All Units ThermostatTable 5 - Electrical Data - 38AUZ*07-14 60 Hz UnitsFull Load Amps Locked Rotor AmpsPRE-START-UP START-UPSystem Check 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. 17 - 38AUZ*08 Charging Chart Fig. 16 - 38AUZ*07 Charging ChartFig. 18 - 38AUZ*12 Charging Chart Fig. 19 - 38AUZ*14 Charging Chart Fig. 20 - 38AU Wiring DiagramROUTINE SYSTEM MAINTENANCE Seasonal MaintenanceOPERATING SEQUENCE Base Unit ControlsComfort Alert Diagnostic Module SERVICEInput Status LED Troubleshooting Information Table 6 - LED Status CodesStatus LED Status LED DescriptionCompressor Protection LubricationNOVATION Coil Cleaning and Maintenance Repairing NOVATION Condenser Tube LeaksField Refrigerant Access Ports Factory High-FlowAccess PortsTROUBLESHOOTING FASTENER TORQUE VALUESFig. 22 - CoreMax Access Port Assembly SEATTROUBLESHOOTING cont APPENDIX Edition Date 03/09 Catalog No 38AU-01SIReplaces NEW I. PRELIMINARY INFORMATION II. PRE-START-UPOUTDOOR UNIT CONTROLSCHECK INDOOR UNIT FAN SPEED AND RECORD