Service Manual - Carrier

1 Service ManualTable of contentsPAGE IDENTIFICATION .. 2 SAFETY CONSIDERATIONS .. 2 General information .. 2 ELECTRICAL .. 3 Aluminum Wire .. 3 ELECTRICAL SYSTEM OVERVIEW .. 3 Terminal Block .. 3 Transformer .. 3 Compressor / Fan Sub-System .. 3 Variable Frequency Drive (VFD).. 5 VFD Filter Board .. 5 Reactors .. 5 High Pressure Switch (HPS).. 5 Compressor Brushless Permanent Magnet Motor (BPM) .. 5 VFD + Compressor BPM .. 5 Fan Brushless Permanent Magnet Motor (BPM) .. 5 VFD + Fan BPM.. 5 Crankcase Heater .. 5 CONTROL SUB-SYSTEM.

2 5 Primary Control Module (PCM).. 5 Control Connection (Communicating and Non-Communicating). 5 Communicating Infinity Control .. 5 Non-Communicating Control .. 6 Table 1 DIP Swtich Settings.. 6 PCM Indicators and Matrix Display.. 6 Model Plug .. 8 Thermistors.. 8 Pressure Sensors .. 8 VFD Control Connection.. 8 Pressure Equalization Valve (PEV) .. 8 Reversing Valve (RVS) .. 8 Heating Electronic Expansion Valve (EXV-H) .. 8 Bluetooth Module .. 8 Accessory Control Components.. 8 Utility Curtailment .. 8 Liquid Line Solenoid Valve (LLS).

3 8 CONTROL FEATURES AND OPERATION.. 9 Equipment Configuration (Model Plug) .. 9 Performance Mode.. 9 Compressor Operation .. 9 Compressor Protect Delay .. 9 Starting .. 9 Running.. 9 Compressor Reliability Protection .. 9 Sump Heat.. 9 Fan Operation .. 9 Intermittent Low Fan Speed .. 9 Fan Operating Exceptions.. 9 Cooling Control .. 9 Heating Control .. 9 Super Heat Control .. 9 Defrost Mode.. 9 Defrost Interval.. 10 Defrost Process.. 10 PCM Indicators and Display Operation.. 10 Status Light.. 10 Comm Light .. 10 VFD Comm Light.

4 10 Matrix Display .. 10 Reprogrammability.. 10 TROUBLESHOOTING .. 11 TROUBLESHOOTING CONTROL FEATURES .. 11 SYSTEM DIAGNOSTICS .. 11 Table 2 Model Plug Information.. 12 COMPONENT DIAGNOSTICS.. 12 Table 3 Variable Speed Compressor Resistances (ohm)(winding resistance at 68 F /20 C) .. 12 Table 4 DC Voltage and PWM Measurement .. 13 Table 5 Thermistor Resistance (k-ohms) vs. Temperature.. 13 DIAGNOSTIC CODES AND TROUBLESHOOTING .. 15 Table 6 Fault Code Table .. 25 REFRIGERATION SYSTEM .. 34 Refrigerant .. 34 Compressor Oil.

5 34 Servicing Systems on Roofs With Synthetic Materials.. 34 Synthetic Roof Precautionary Procedure .. 34 Brazing.. 34 Service Valves and Pumpdown .. 34 Pumpdown & Evacuation.. 35 Pump Down .. 35 Evacuation and Recovery of Refrigerant from 25 VNA4 .. 35 Reversing Valve (25 VNA4) .. 35 Liquid Line Filter Drier .. 36 Install Liquid-line Filter Drier Indoor.. 36 Suction Line Filter Drier .. 36 Thermostatic Expansion Valve (TXV) .. 36 TXV Operation.. 37 Accumulator.. 37 Vapor Injection Operation (5 Ton Models) .. 37 Vapor Injection Electronic Exp.

6 Valve (EXV VI)(5 Ton Models) .. 38 REFRIGERATION SYSTEM REPAIR.. 38 Leak Detection.. 38 Coil Removal.. 3824 VNA6 / 25 VNA4 Infinity SeriesVariable Speed Air conditioner and Heat Pumpwith Greenspeed Intelligence2 to 5 Nominal Tons24 VNA6 / 25 VNA4: Service ManualManufacturer reserves the right to change, at any time, specifications and designs without notice and without IDENTIFICATIONThe unit is identified using a 16 digit model number structure. It is recommended providing the complete 16 digit model number when orderingreplacement parts to insure receiving the correct CONSIDERATIONSI nstallation, Service , and repair of these units should be attempted onlyby trained Service technicians familiar with standard Service instructionand training equipment should be installed in accordance with accepted practicesand unit Installation Instructions, and in compliance with all national andlocal codes.

7 Power should be turned off when servicing or repairingelectrical components. Extreme caution should be observed whentroubleshooting electrical components with power on. Observe allwarning notices posted on equipment and in instructions or systems contain refrigerant under pressure. Extremecaution should be observed when handling refrigerants. Wear safetyglasses and gloves to prevent personal injury. During normal systemoperations, some components are hot and can cause burns.

8 Rotating fanblades can cause personal injury. Appropriate safety considerations areposted throughout this Manual where potentially dangerous techniquesare you do not understand any of the warnings, contact your productdistributor for better interpretation of the warnings. General informationThe Greenspeed Intelligence heat pump and air conditioner features thelatest variable speed technology. The heart of the system is the Samsunghigh side rotary or scroll variable speed compressor powered through theuse of the Samsung variable frequency drive (VFD) control.

9 Bycombining the Primary Control Module (PCM), an ECM outdoor fan,Samsung VFD, Samsung variable speed compressor and the InfinitySeries outdoor cabinet, the HP unit achieves a Seasonal EnergyEfficiency Ratio (SEER) of up to 24 and up to 13 Heating SeasonalPerformance Factor (HSPF) and the AC achieves up to 26 ensure all of the above technology provides the ultimate in comfort, itis combined with either a fan coil or Variable Speed Gas furnacecontrolled with a two wire communication Infinity wall Number Nomenclature123 45 6 7891011 12 1314151624 V N A6 36 A 0 0 3 00 0 0 Product SeriesProduct FamilyTierMajor SeriesSEERC ooling Capacity 1,000 Btuh (nominal)

10 Variations Open OpenVoltageMinor SeriesOpenCompressor IdentificationOpen24=AC25=HPV=Variable SpeedInfinity SeriesA = Puron6 = Up to 26 SEER4 = Up to 24 SEERA = Standard0=Not Defined0=Not Defined3=208/230-10=Not Defined4=VS Scroll5=VS Rotary0=Not DefinedSERIAL NUMBER NOMENCLATURE0118E00001 Week of ManufacutreSerial NumberYear of ManufactureManufacturing SiteE = Collierville, TNX = Nonterey MexicoWARNING!ELECTRICAL SHOCK HAZARDF ailure to follow this warning could result in personal injury or installing, modifying, or servicing system, main electricaldisconnect switch must be in the OFF position.