Rheem P17 Series Installation Instructions Manual
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Rheem P17 Series Installation Instructions Manual

Three stage r-410a heat pump outdoor units
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WARNING:
RECOGNIZE THIS SYMBOL
AS AN INDICATION OF
IMPORTANT SAFETY
INFORMATION
WARNING
THESE INSTRUCTIONS
ARE INTENDED AS AN AID
TO QUALIFIED, LICENSED
SERVICE PERSONNEL FOR
PROPER INSTALLATION,
ADJUSTMENT, AND
OPERATION OF THIS UNIT.
READ THESE INSTRUCTIONS
THOROUGHLY BEFORE
ATTEMPTING INSTALLATION
OR OPERATION. FAILURE
TO FOLLOW THESE
INSTRUCTIONS MAY
RESULT IN IMPROPER
INSTALLATION,
ADJUSTMENT, SERVICE,
OR MAINTENANCE
POSSIBLY RESULTING IN
FIRE, ELECTRICAL SHOCK,
PROPERTY DAMAGE,
PERSONAL INJURY, OR
DEATH.
Do not destroy this manual.
Please read carefully and
keep in a safe place for future
reference by a serviceman.
[ ] Indicates metric conversions.
Printed in USA
92-105074-05-08 ( / )
THREE STAGE R-410A HEAT
PUMP OUTDOOR UNITS
INSTALLATION INSTRUCTIONS
(-)P17 (17 SEER) EQUIPPED WITH
ECONET™ COMMUNICATIONS
Enabled
Accredited by the RvA
ISO 9001:2008
Certificate Number: 30464

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Summary of Contents for Rheem P17 Series

  • Page 1 THREE STAGE R-410A HEAT WARNING: RECOGNIZE THIS SYMBOL PUMP OUTDOOR UNITS AS AN INDICATION OF IMPORTANT SAFETY INFORMATION WARNING THESE INSTRUCTIONS Enabled ARE INTENDED AS AN AID TO QUALIFIED, LICENSED SERVICE PERSONNEL FOR PROPER INSTALLATION, INSTALLATION INSTRUCTIONS ADJUSTMENT, AND OPERATION OF THIS UNIT. READ THESE INSTRUCTIONS (-)P17 (17 SEER) EQUIPPED WITH THOROUGHLY BEFORE...

  • Page 2: Table Of Contents

    CONTENTS 1.0 IMPORTANT SAFETY INFORMATION............3 6.0 NORMAL SEQUENCE OF OPERATION..........30-32 2.0 GENERAL INFORMATION..............4-5 6.1 Cooling Mode..................30 2.1 Introduction..................4 6.2 On-Demand Cooling Dehumidification..........30 2.2 Agency Performance Audit Testing Notice...........4 6.3 Low Ambient Cooling Operation ............30 2.3 Importance of a Quality Installation.............4 6.4 Heating Mode..................30 2.4 System Sizing and Selection..............4 6.5 Supplemental Electric Heat During Heating Mode......31...

  • Page 3: Important Safety Information

    1.0 IMPORTANT SAFETY INFORMATION WARNINGS: CAUTIONS: • These instructions are intended as an aid to • R-410A systems operate at approximately 60% higher pressures (1.6 times) than R-22 systems. DO qualified, licensed service personnel for proper installation, adjustment, and operation of this unit. NOT use R-22 service equipment or components on Read these instructions thoroughly before attempting R-410A equipment.

  • Page 4: General Information

    Read the entire instruction manuals before starting the installation. The (-)P17 series heat pumps are specifically designed to operate with matching communicating IMPORTANT: This product has been designed EcoNet™...

  • Page 5: Importance Of Proper Indoor/Outdoor Match-Ups

    2.0 GENERAL INFORMATION to be removed. A heat gain calculation also To assure many years of reliable operation calculates the extra heat load caused by sunlight and optimum customer comfort and to assure and by humidity removal. These factors must be the outdoor unit warranty remains valid, an air- considered before selecting a heat pump system to handler model or indoor coil/furnace combination...

  • Page 6: Electrical And Physical Data

    3.0 UNIT SPECIFICATIONS 3.2 Electrical and Physical Data ELECTRICAL Rev. 07/15 Compressor Fuse or HACR Circuit Breaker Locked Minimum Model Phase Rated Load Rotor Fan Motor Circuit Number Frequency (Hz) Amperes Amperes Full Load Ampacity Minimum Maximum (-)P17 Voltage (Volts) (RLA) (LRA) Amperes (FLA)

  • Page 7: Installation

    4.0 INSTALLATION 4.1 Tools and Refrigerant 4.1.1 Tools Required for Pressure: The pressure of R-410A is approximately 60% (1.6 times) greater than Installing and Servicing R-22. Recovery and recycle equipment, pumps, R-410A Models hoses, and the like must have design pressure ratings appropriate for R-410A.

  • Page 8: Choosing A Location

    4.0 INSTALLATION 4.2 Choosing a Location 4.2.1 Allowable Clearances 4.2.2 Operational Issues 12" to side intake louvers IMPORTANT: 24" to service access panels Locate the unit in a 60" vertical for fan discharge manner that will not prevent, impair, or compromise the performance of other equipment installed If space limitations exist, the following clearances in proximity to the unit.

  • Page 9: Corrosive Environments

    4.0 INSTALLATION 4.2 Choosing a Location (cont.) 4.3 Unit Mounting 4.2.3 Corrosive Environment The metal parts of this unit may be subject to 4.3.1 Unit Mounting Methods rust or deterioration if exposed to a corrosive environment. This oxidation could shorten the The outdoor heat pump unit may be mounted in equipment’s useful life.

  • Page 10: Elevating Unit

    4.0 INSTALLATION NOTICE: 4.3.3 Elevating Unit DO NOT block drain openings on bottom of unit. WARNING: Secure an elevated unit and • If unit must be elevated because of anticipated its elevating stand in order to prevent tipping. Failure to snowfall, secure unit and elevating stand such that do so may result in severe personal injury or death.

  • Page 11: Refrigerant Line Set Selection

    4.0 INSTALLATION 4.4 Refrigerant Line Set Selection 4.4.1 Replacing Existing 4.4.2.2 Refrigerant Migration During Off Cycle Systems Long line set applications can require a consider- To prevent failure of a new unit, the existing line set able amount of additional refrigerant. This addition- must be correctly sized for the new unit and must al refrigerant needs to be managed throughout the be cleaned or replaced.

  • Page 12: Compressor Oil Level Adjustment

    4.0 INSTALLATION 4.4.2.5 Oil Level Adjustment for 4.4.2.6 Capacity Losses Long Line Set Applications Long line lengths can result in a reduction in capac- ity due to vapor line pressure drop and heat gain or Additional oil will need to be added if refrigerant is loss.

  • Page 13: Liquid Line Selection

    4.0 INSTALLATION 4.4.4 Liquid Line Selection The procedure for selecting the proper liquid line is as follows: The purpose of the liquid line is to transport warm • Measure the total amount of vertical separation sub-cooled liquid refrigerant between the outdoor unit between the outdoor unit and indoor coil.
  • Page 14 4.0 INSTALLATION Table 2A: Refrigerant Line Sizing Chart (English Units) 17 SEER 3-Stage Heat Pumps Outdoor Unit ABOVE or BELOW Indoor Unit Allowable Allowable Equivalent Length (Feet) Unit Size Liquid Line Vapor Line < 25 26-50 51-75 76-100 101-125 126-150 Size Size Maximum Vertical Separation / Capacity Multiplier...
  • Page 15 4.0 INSTALLATION Table 2B: Refrigerant Line Sizing Chart (Metric Units) 17 SEER 3-Stage Heat Pumps Outdoor Unit ABOVE or BELOW Indoor Unit Allowable Allowable Equivalent Length (Meters) Liquid Line Vapor Line Unit Size Size Size < 8 8-15 16-23 24-30 31-38 39-46 mm [in.]...

  • Page 16: Line Set Installation

    4.0 INSTALLATION 4.5 Line Set Installation • If tubing is to be run underground, it must be run in in the heating mode will result in noise inside the a sealed watertight chase. structure. • Use care in routing tubing and DO NOT kink or •...

  • Page 17: Relative Location Of Indoor And Outdoor Units

    4.0 INSTALLATION 4.5 Line Set Installation (cont.) 4.5.2 Relative Location of Indoor and Outdoor Units 4.5.2.1 Outdoor Unit Level or Near Level to Indoor Coil Line Set REFERENCE TABLE 2 FOR MAXIMUM LENGTH LIMITATIONS IDEALLY, LINE SET SLOPES AWAY FROM OUTDOOR UNIT. VERIFY SUB-COOLING PRIOR TO EXPANSION DEVICE, INSULATED LIQUID LINE IN UNCONDITIONED SPACE.

  • Page 18: Outdoor Unit Below Indoor Unit

    4.0 INSTALLATION 4.5.2.2 Outdoor Unit Below Indoor Coil (Long Line Set Applications) INSULATED VAPOR LINE FULL LENGTH INVERTED TRAP VERIFY LIQUID SUBCOOLING EVEN WITH TOP PRIOR TO EXPANSION DEVICE OF THE COIL IN THE COOLING MODE. INSULATE LIQUID LINE IN UNCONDITIONED SPACE FOR LONG REFERENCE TABLE 2 FOR LINE APPLICATIONS...

  • Page 19: Outdoor Unit Above Indoor Unit

    4.0 INSTALLATION 4.5.2.3 Outdoor Unit Above Indoor Coil Figure 5 For applications with the outdoor unit above the • Verify at least 5°F [2.8ºC] of liquid subcooling at indoor coil the following is required: the outdoor unit prior to expansion device in the heating mode.

  • Page 20: Tubing Connections

    4.0 INSTALLATION 4.5.3 Tubing Connections Indoor coils have only a holding charge of dry nitrogen. Keep all tube ends sealed until connections are to be made. • Use type “L” copper refrigeration tubing. Braze the connections with the following alloys: –...

  • Page 21: Initial Leak Testing

    4.0 INSTALLATION 4.6 Initial Leak Testing Indoor coils have only a holding charge of dry nitrogen. Keep all tube ends sealed until connections are to be made. WARNING: DO NOT use oxygen to purge lines or pressurize system for leak test. Oxygen reacts violently with oil, which can cause an explosion resulting in severe personal injury or ST-A1226-06-00...

  • Page 22: Final Leak Testing

    4.0 INSTALLATION 4.9.1 EcoNet Communications ™ The EcoNet enabled (-)P17 Series heat pumps are specifically designed to be matched with and EcoNet enabled air-handler or gas furnace and the EcoNet Control Center. While they are also designed to be controlled by a conventional 24VAC 2-stage thermostat, many features and benefits are lost.

  • Page 23: Conventional 24Vac Thermostat Control Wiring Connections

    Connection indoor and outdoor units. This will damage the controls. The (-)P17 series of heat pumps allow the installer to use conventional 24 VAC control wiring and a The EcoNet™ control system requires four (4) conventional thermostat for limited unit operation.

  • Page 24: Power Wiring

    WIRING 4.9 Control Wiring (cont.) 4.10 Power Wiring TYPICAL 2-STAGE THERMOSTAT: HEAT PUMP WITH It is important that proper electrical power is ELECTRIC HEAT available at the heat pump power terminal block. The acceptable operating voltage range is shown below. Typical Two-Stage Thermostat VOLTAGE RANGES (-)H2T or (-)HMV...

  • Page 25: Grounding

    4.0 INSTALLATION 4.11 Grounding WARNING: The unit must be permanently grounded. Failure to do so can cause electrical shock resulting in severe personal injury or death. A ground lug is provided near the line-voltage power entrance for a ground wire. Ground Lug ST-A1241-01-X0 5.0 SYSTEM START-UP AND REFRIGERANT CHARGING...

  • Page 26: Tm Control Center Service Menu

    5.0 SYSTEM START-UP AND REFRIGERANT CHARGING 5.4 Initial System 5.6 Entering Charge Start-Up Mode Using Variable Speed Outdoor Control Using the EcoNet™ Control Center service menu (See Section 5.5 below) or using the thermostat (VSODC) Menu When and air-handler or gas furnace control board TEST &...

  • Page 27: Indoor Air-Flow Verification

    5.0 SYSTEM START-UP AND REFRIGERANT CHARGING 5.7 Indoor Air-Flow Verification Correct indoor air-flow and proper supply air When the (-)P17 heat pumps are matched to EcoNet enabled (-)HMV air-handlers and distribution is critical to system comfort, efficiency (-)802V, (-)96V, (-)97V, and (-)98V gas furnaces and and reliability.

  • Page 28: Measurement Device Set-Up

    5.0 SYSTEM START-UP AND REFRIGERANT CHARGING 5.8.1 Measurement Device SUBCOOLING PER THE SYSTEM CHARGING CHART MUST BE USED FOR FINAL CHARGE Set-Up ADJUSTMENT. 1. With an R-410A gauge set, attach the high- pressure hose to the access fitting on the liquid line (small) service valve at the OD unit.

  • Page 29: Final Charging By Liquid Subcooling

    5.0 SYSTEM START-UP AND REFRIGERANT CHARGING NOTICE: NOTICE: The refrigerant pressures Systems should not be charged provided are for preliminary charge check ONLY. below 40°F [4.4°C] outdoor temperature. These pressure values are typical, but may vary NOTICE: If the indoor temperature is due to application.

  • Page 30: Normal Sequence Of Operation

    6.0 NORMAL SEQUENCE OF OPERATION The following sections provide details on how gas furnaces. This feature allows the system to the (-)P17 heat pump systems are designed automatically increase the level of dehumidification to operate under normal conditions. Under in the cooling mode by decreasing the indoor air- abnormal conditions, Active Compressor and flow by 15% when the indoor relative humidity Inverter Protection features built into the controls...

  • Page 31: Supplemental Electric Heat During Heating Mode

    6.0 NORMAL SEQUENCE OF OPERATION the building load until the maximum compressor is controlled by the Variable Speed Outdoor speed is reached. Overdrive is disabled above Control (VSODC). (-)P17 heat pumps utilizes 32°F. Since the noise level of the compressor “demand defrost”...

  • Page 32: Sequence Of Operation For Conventional 24Vac Thermostat Controls

    6.0 NORMAL SEQUENCE OF OPERATION 6.8 Sequence • Defrost Termination: The defrost cycle will continue until the coil temperature has reached of Operation for the termination temperature or 14 minutes have elapsed, whichever comes first. The Conventional 24VAC factory default termination temperature is 60°F [15.6°C], although this temperature can be Thermostat Controls changed to 40°F [4.4°C], 50°F [10°C], or 70°F...

  • Page 33: Components And Controls

    7.0 COMPONENTS & CONTROLS 7.1 Accumulator 7.5 Compressor Sump Thermistor All (-)P17 EcoNet™ heat pumps are equipped with an accumulator for the purpose of managing (-)P17 heat pumps utilize a sump thermistor to possible refrigerant flood back issues that may monitor the condition of the lower bearing in the occur at abnormal environmental conditions.

  • Page 34: Econet Tm Variable Speed Outdoor Control (Vsodc)

    7.0 COMPONENTS & CONTROLS 7.7 EcoNet Variable Speed Outdoor Control (VSODC) ™ 7.7.1 Board Features and 5. Outdoor ambient thermistor connection 6. Coil sensor (EVAPIN) and suction thermistor Connections (OST) connections 7. Liquid line (OLT – for future use) and (-)P17 heat pumps are equipped with a Variable compressor sump (CPT) connections Speed Outdoor Control (VSODC) that interfaces...

  • Page 35: Test & Sw2 Buttons

    7.0 COMPONENTS & CONTROLS 7.7 EcoNet Variable Speed Outdoor Control (VSODC) (cont.) ™ 7.7.2 TEST and SW2 Buttons 7.7.3 Memory Card TEST and SW2 buttons are used to enter the • The memory card stores all unit information. following menus and modes: •...

  • Page 36: Menu Structure

    7.0 COMPONENTS & CONTROLS 7.7 EcoNet Variable Speed Outdoor Control (VSODC) (cont.) ™ IMPORTANT: 7.7.7 Menu Structure This mode should be manually exited. If this menu is not exited The VSODC is equipped with a dual 7-segment manually the VSODC will wait 24 hours before LED display and two push buttons (SW2 and returning to normal operation.

  • Page 37: Electronic Expansion Valve

    7.0 COMPONENTS & CONTROLS 7.8 Electronic Expansion Valve (-)P17 heat pumps are equipped with electronic stator for serviceability. An internal check valve expansion valves (EXV). The advantage an EXV is provided that assures unrestricted flow in the is their ability to accurately control refrigerant reverse direction when the system is operating in flow over a much wider capacity range than a the cooling mode.

  • Page 38: High Pressure Control

    7.0 COMPONENTS & CONTROLS 7.10 High Pressure Control Center or conventional 24VAC 2-stage thermostat. The inverter converts incoming sin- Control (HPC) gle phase power to simulated variable frequency 3-phase power that is connected to the 3-phase Sensing of the compressor discharge pressure is compressor motor.

  • Page 39: Suction Pressure Transducer

    7.0 COMPONENTS & CONTROLS 7.15 Suction Pressure Transducer (-)P17 heat pumps are equipped with a suction pressure transducer for the purpose of measuring the suction pressure between the reversing valve and the accumulator. The output of this device is a 0.5 – 4.5VDC signal that the VSODC converts to a pressure used in calculating the heating mode suction superheat.

  • Page 40: Active System Protection Features

    8.0 ACTIVE SYSTEM PROTECTION FEATURES 8.4 Off-Cycle The controls found in the (-)P17 heat pumps are designed to prevent the system from operating Refrigerant Migration – in under conditions that could be harmful to the compressor and inverter. The Variable Speed Stator Heat Outdoor Control (VSODC) and Power Inverter continuously monitor multiple sensors, current, and...

  • Page 41: Low Suction Pressure/Loss Of Charge

    8.0 ACTIVE SYSTEM PROTECTION FEATURES 8.8 Compressor Shut- power to both the indoor and outdoor units for 1 minute and then reconnecting power. Down Sequence for NOTE: If the system experiences a high High or Low Refrigerant refrigerant pressure lock-out, the system should be evaluated to determine the cause Pressure Fault for the high pressure condition and corrective...

  • Page 42: Over And Under Voltage

    8.0 ACTIVE SYSTEM PROTECTION FEATURES 8.11 Over and Under 8.13 Controls and Voltage Communication Malfunction If the supply voltage or internal DC voltage is not within an acceptable operating range, the inverter If the controls senses a malfunction within the will shut the compressor off until the voltage control system or communications or if system returns to an acceptable level.

  • Page 43: Diagnostics And Troubleshooting

    9.0 DIAGNOSTICS & TROUBLESHOOTING Advanced operating status and diagnostic will operate. information is available through the Variable Speed 3) The display will change to a steady “c,” “C,” Outdoor Control dual 7-segment display and the “h,” or “H” to show the current demand for EcoNet Control Center that greatly enhances the unit operation.

  • Page 44: Status And Diagnostic Codes

    9.0 DIAGNOSTICS & TROUBLESHOOTING 9.4 Status and Diagnostic Codes Descriptions of the VSODC status codes are provided below. Dual 7-Segment Status/Possible Cause – NOTE: Codes must be read from correct side to avoid an error in reading codes. LEDs Display Status Code Description Troubleshooting Information Code...
  • Page 45 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.4 Status and Diagnostic Codes (cont.) The error codes below will be displayed at the EcoNet™ Control Center under Service window / Current Faults or in the Fault History and will be time and date stamped. VSODC (Variable Speed Outdoor Unit Control – EcoNet™...
  • Page 46 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.4 Status and Diagnostic Codes (cont.) The error codes below will be displayed at the EcoNet™ Control Center under Service window / Current Faults or in the Fault History and will be time and date stamped. VSODC (Variable Speed Outdoor Unit Control – EcoNet™...
  • Page 47 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.4 Status and Diagnostic Codes (cont.) The error codes below will be displayed at the EcoNet™ Control Center under Service window / Current Faults or in the Fault History and will be time and date stamped. VSODC (Variable Speed Outdoor Unit Control – EcoNet™...
  • Page 48 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.4 Status and Diagnostic Codes (cont.) The error codes below will be displayed at the EcoNet™ Control Center under Service window / Current Faults or in the Fault History and will be time and date stamped. VSODC (Variable Speed Outdoor Unit Control – EcoNet™...
  • Page 49 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.4 Status and Diagnostic Codes (cont.) The error codes below will be displayed at the EcoNet™ Control Center under Service window / Current Faults or in the Fault History and will be time and date stamped. VSODC (Variable Speed Outdoor Unit Control – EcoNet™...
  • Page 50 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.4 Status and Diagnostic Codes (cont.) The error codes below will be displayed at the EcoNet™ Control Center under Service window / Current Faults or in the Fault History and will be time and date stamped. VSODC (Variable Speed Outdoor Unit Control – EcoNet™...
  • Page 51 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.4 Status and Diagnostic Codes (cont.) The error codes below will be displayed at the EcoNet™ Control Center under Service window / Current Faults or in the Fault History and will be time and date stamped. VSODC (Variable Speed Outdoor Unit Control – EcoNet™...

  • Page 52: Active Protection Fault Details

    9.0 DIAGNOSTICS & TROUBLESHOOTING 9.5 Active Protection Fault Details IMPORTANT: L8 – Compressor Model Unknown – A900_O This mode of active Inverter Identity Fault protection must be manually reset If the inverter compressor model is not set, the inverter will keep the compressor from operation. The VSODC will lock out the compressor to keep it from operating and flash an ”L”...
  • Page 53 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.5 Active Protection Fault Details (cont.) L15 – PIM Over-temp – T908_O Inverter Fault protection must be manually reset. If the inverter detects an over temperature condition in the Power Module circuit the inverter will automatically shut the compressor off and keep it from operation.
  • Page 54 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.5 Active Protection Fault Details automatically shut the compressor off and keep it from operation. If this fault occurs 3 times during one call for operation the VSODC will lock out the compressor to keep it from continuing to operate and flash an ”L”...
  • Page 55 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.5 Active Protection Fault Details (cont.) and flash an ”L” on the dual 7-segment LEDs IMPORTANT: followed by a 16. This mode of active protection must be manually reset. IMPORTANT: This mode of active protection must be automatic reset once the discharge line thermistor fault is corrected.
  • Page 56 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.5 Active Protection Fault Details 16 – HP Sensor Not Configured – T926_O Active Protection – Code If the inverter is not configured or does not hold the configuration for the high pressure switch in the 21L –...
  • Page 57 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.5 Active Protection Fault Details (cont.) IMPORTANT: increases to ≥187VAC. At this time the VSODC It is common during will restart the compressor. While the compressor startup and shutdown for the compressor to is off the VSODC will display a 27 on the dual venture outside the designed operating envelope.
  • Page 58 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.5 Active Protection Fault Details D1 – Memory Card Configuration Data Write Failure – A951_O If the VSODC identifies issue(s) writing the model data from the memory card, the VSODC will automatically shut the compressor off and keep it 83 –...

  • Page 59: Electrical Checks Flowchart

    9.0 DIAGNOSTICS & TROUBLESHOOTING 9.6 Electrical Checks Flowchart THERMOSTAT CALL FOR COOLING OPERATION, NO COOLING OPERATION...

  • Page 60: Cooling Mechanical Checks Flowchart

    9.0 DIAGNOSTICS & TROUBLESHOOTING 9.7 Cooling Mechanical Checks Flowchart...

  • Page 61: Heating Mechanical Checks Flowchart

    9.0 DIAGNOSTICS & TROUBLESHOOTING 9.8 Heating Mechanical Checks Flowchart...

  • Page 62: Defrost Mechanical Checks Flowchart

    9.0 DIAGNOSTICS & TROUBLESHOOTING 9.9 Defrost Mechanical Checks Flowchart Defrost System Incomplete Excessive Defrost Defrost Defrost Time Reversing Valve Sensor in Wrong Sensor in Wrong Stuck Location Location Welded Reversing Valve Wrong Defrost Low System Relay on Control Board Timer Setting Charge Loose Defrost Wind Affecting...

  • Page 63: Checking Transducers And Temperature Sensors

    9.0 DIAGNOSTICS & TROUBLESHOOTING 9.10 Checking Transducers & Temperature Sensors TRANSDUCERS: Starting with some arbitrary numbers completion of the formula should look like this: Checking transducers for accuracy can be tricky at best. A technician will be required to do some SUCTION LINE TRANSDUCER: voltage reading and algebraic math to validate the VDC out = 2.4...
  • Page 64 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.10 Checking Transducers & Temperature Sensors (cont.) TEMPERATURE SENSORS: All the temperature sensors/thermistors used in the Apply resistance measurements to the chart found equipment use the same scale of 10,000 Ohms below and compare to the control. at 77ºF (25ºC).

  • Page 65: General Troubleshooting Guide

    9.0 DIAGNOSTICS & TROUBLESHOOTING 9.11 General Troubleshooting Guide WARNING: Disconnect all power to unit before servicing. Contactor may break only one side. Failure to shut off power can cause electrical shock resulting in personal injury or death. SYMPTOM POSSIBLE CAUSE REMEDY Unit will not run •...

  • Page 66: Service Analyzer Charts

    9.0 DIAGNOSTICS & TROUBLESHOOTING 9.12 Service Analyzer Charts...
  • Page 67 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.12 Service Analyzer Charts (cont.)
  • Page 68 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.12 Service Analyzer Charts (cont.)
  • Page 69 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.12 Service Analyzer Charts (cont.)
  • Page 70 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.12 Service Analyzer Charts (cont.)
  • Page 71 9.0 DIAGNOSTICS & TROUBLESHOOTING 9.12 Service Analyzer Charts (cont.) Service Analyzer Charts ELECTRONIC EXPANSION VALVES (cont.) SYMPTOM POSSIBLE CAUSE REMEDY Unequal evaporator circuit loading Ensure airflow is equally distributed through Superheat is low evaporator. to normal with low suction pressure Check for blocked distributor tubes.

  • Page 72: Troubleshooting Tips

    9.0 DIAGNOSTICS & TROUBLESHOOTING 9.13 Troubleshooting Tips COOLING MODE TROUBLESHOOTING TIPS INDICATORS SYSTEM DISCHARGE SUCTION SUPERHEAT SUBCOOLING PROBLEM PRESSURE PRESSURE Normal: 5°–15°F Normal: See [2.8° – 8.3°C] Charging Chart Overcharge High High High Undercharge High Liquid Restriction High High (Drier) Dirty Outdoor Coil High High...

  • Page 73: Outdoor Unit Maintenance

    10.0 OUTDOOR UNIT MAINTENANCE 10.1 Outdoor Coil Cleaning The outdoor fan draws air across the coil during an angle. Washing from the top of the coil down operation which results in contaminants collecting from the inside out is the most effective method of on and between the aluminum fins.

  • Page 74: Wiring Diagram

    11.0 WIRING DIAGRAM UTIL UTIL 2 UTIL UTIL 24...

  • Page 75: Appendix

    12.0 APPENDIX 12.1 Agency Performance Audit Test Instructions Performance audit testing a (-)P17 variable speed d. The “Yes” should turn to a value of “No.” heat pump rated combination requires an EcoNet™ 6. Once the dehumidification feature is turned Control Center (according to the AHRI rating off, the Aux 1 configuration needs to be set to database) as an accessory to obtain the rated normally closed (N.C.) as to permit a closed...
  • Page 76 12.0 APPENDIX 12.1 Agency Performance Audit Test Instructions (cont.) NOTE: In order to change from heating 9. Exiting the Test Mode mode to cooling mode or vice versa the NOTE: While the test mode is active the system must first be turned off by pressing thermostat will not permit return to the home the blue down button until “stop test”...

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