Rheem ECONET RP2024BJVCA Installation Instructions Manual
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Rheem ECONET RP2024BJVCA Installation Instructions Manual

Ariable speed 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.
92-105074-14-01 (02/18) Printed in USA
VARIABLE SPEED R-410A
HEAT PUMP OUTDOOR UNITS
INSTALLATION INSTRUCTIONS
(-)P20 (20 SEER) EQUIPPED WITH
ECONET™ COMMUNICATIONS
Enabled

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Summary of Contents for Rheem ECONET RP2024BJVCA

  • Page 1 VARIABLE SPEED R-410A WARNING: HEAT PUMP OUTDOOR UNITS RECOGNIZE THIS SYMBOL AS AN INDICATION OF IMPORTANT SAFETY INFORMATION WARNING THESE INSTRUCTIONS Enabled ARE INTENDED AS AN AID TO QUALIFIED, LICENSED SERVICE PERSONNEL FOR INSTALLATION INSTRUCTIONS PROPER INSTALLATION, ADJUSTMENT, AND OPERATION OF THIS UNIT. READ THESE INSTRUCTIONS THOROUGHLY BEFORE (-)P20 (20 SEER) EQUIPPED WITH...

  • Page 2: Table Of Contents

    CONTENTS 1.0 IMPORTANT SAFETY INFORMATION ............3 6.0 NORMAL SEQUENCE OF OPERATION............30 2.0 GENERAL INFORMATION ................4 6.1 Cooling Mode ..................30 6.2 On-Demand Cooling Dehumidification ..........30 2.1 Introduction ..................4 6.3 Low Ambient Cooling Operation ............30 2.2 Agency Performance Audit Testing Notice ..........

  • 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 not use R-22 service equipment or components on installation, adjustment, and operation of this R-410A equipment.

  • Page 4: General Information

    2.0 GENERAL INFORMATION 2.3 Importance of WARNING: Quality Installation Improper installation, or installation not made in accordance with these instructions, can result A quality installation is critical to assure safety, in unsatisfactory operation and/or dangerous reliability, comfort, and customer satisfaction. conditions and can cause the related warranty Strict adherence to applicable codes, the not to apply.

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

    2.0 GENERAL INFORMATION 2.5 Importance of to be removed. A heat gain calculation also calculates the extra heat load caused by sunlight Proper Indoor/Outdoor and by humidity removal. These factors must be considered before selecting a heat pump Match-Ups system to provide year-round comfort. The Air To assure many years of reliable operation and Conditioning Contractors of America (ACCA) optimum customer comfort and to assure the...

  • Page 6: Electrical And Physical Data

    3.0 UNIT SPECIFICATIONS 3.2 Electrical and Physical Data ALLOW 60" [1524mm] OF ALLOW 60” [1524mm] CLEARANCE OF CLEARANCE “W” “L” “H” SERVICE PANELS/ INLET CONNECTIONS / HIGH & LOW VOLTAGE SERVICE PANELS/ INLET CONNECTIONS / HIGH & LOW ACCESS ALLOW VOLTAGE ACCESS 24"...

  • 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 60" vertical for fan discharge in a manner that will not prevent, impair, or compromise the performance of other equipment If space limitations exist, the following clearances installed 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 Adjustments for 4.4.2.6 Capacity Losses Long Line Set Applications Long line lengths can result in a reduction in capacity due to vapor line pressure drop and heat Additional oil will need to be added if refrigerant is gain or loss.

  • Page 13: Liquid Line Selection

    4.0 INSTALLATION 4.4.4 Liquid Line Selection [345 kPa]. 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 sepration sub-cooled liquid refrigerant between the outdoor between the outdoor unit and indoor coil.
  • Page 14 4.0 INSTALLATION Table 2A: Refrigerant Line Sizing Chart (English Units) 20 SEER Variable Speed 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...
  • Page 15 4.0 INSTALLATION Table 2B: Refrigerant Line Sizing Chart (Metric Units) 20 SEER Variable Speed Heat Pumps Outdoor Unit ABOVE or BELOW Indoor Unit Allowable Allowable Vapor Equivalent Length (Meters) Liquid Line Unit Size Line Size Size < 8 8-15 16-23 24-30 31-38 39-46...

  • 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 twist. •...

  • 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 (-)P20 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

    4.0 INSTALLATION 4.9 Control Wiring (cont.) IMPORTANT: 4.9.4 Conventional 24VAC The EcoNet™ control Thermostat Control Wiring system requires continuous 18 AWG thermostat wire. Do not use phone cord to connect indoor Connections and outdoor units. This will damage the controls. The (-)P20**B series of heat pumps allow the installer to use conventional 24 VAC control wiring The EcoNet™...

  • Page 24: Power Wiring

    4.0 INSTALLATION 4.9 Control Wiring (cont.) 4.10 Power Wiring TYPICAL SINGLE-STAGE THERMOSTAT: It is important that proper electrical power is HEAT PUMP WITH AIR-HANDLER available at the heat pump power terminal block. The acceptable operating voltage range is shown below. VOLTAGE RANGES (60 HZ) Nameplate Operating Voltage Range at...

  • 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 grounding lug is provided near the line-voltage power entrance for a ground wire. ST-A1241-01-X0 5.0 SYSTEM START-UP AND REFRIGERANT CHARGING 5.1 System Start-Up...

  • Page 26: Entering Charging Mode Using Econet™ Control Center Service Menu

    5.0 SYSTEM START-UP AND REFRIGERANT CHARGING 5.5 Entering Charge 5.6 Entering Charge Mode Using EcoNet Mode When Using a ™ Control Center Service Conventional 24VAC Menu Thermostat 1. Set the "Mode" to the "OFF" position. 1. Set the thermostat to the cool or heat mode depending on which mode the system is to be 2.

  • Page 27: Indoor Air-Flow Verification

    5.0 SYSTEM START-UP AND REFRIGERANT CHARGING 5.7 Indoor Air-Flow will display the indoor CFM in the Service Menu of the control. The approximate CFM is also Verification displayed in 100 CFM increments by a flashing LED on the air-handler or furnace control board while the blower is operating (one flash per 100 Correct indoor air-flow and proper supply air CFM) for installations where a conventional 24VAC...

  • Page 28: Measurement Device Set-Up

    5.0 SYSTEM START-UP AND REFRIGERANT CHARGING 5.8.1 Measurement Device and adjust as necessary. CHARGING BY LIQUID SUBCOOLING PER THE SYSTEM CHARGING Set-Up CHART MUST BE USED FOR FINAL CHARGE 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 due NOTICE: If the indoor temperature is to application.

  • Page 30: Normal Sequence Of Operation

    6.0 NORMAL SEQUENCE OF OPERATION The following sections provide details on how the compressor to speed up and operate at the (-)P20 heat pump systems are designed greater than 100% capacity (Overdrive Mode) to operate under normal conditions. Under in an attempt to meet the building load until the abnormal conditions, Active Compressor and maximum compressor speed is reached.

  • Page 31: Supplemental Electric Heat During Heating Mode

    6.0 NORMAL SEQUENCE OF OPERATION 6.6 Dual Fuel Applications between the temperature set-point and the room temperature measured at the Control Center. One – Heating Mode second after the compressor starts, the VSODC will direct the variable speed ECM outdoor motor to operate at the appropriate speed to deliver If the building load should exceed the heat pump the necessary outdoor air-flow for that capacity...

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

    6.0 NORMAL SEQUENCE OF OPERATION 6.8 Sequence The indoor air-handler or gas furnace is directed to supply supplemental heat of Operation for to prevent cold air from being discharged from the supply registers during the Conventional 24VAC defrost cycle. Thermostat Controls The compressor speed is ramped to the pre-determined defrost speed for the When the (-)P20**B heat pump system is...

  • Page 33: Components And Controls

    7.0 COMPONENTS & CONTROLS 7.1 Accumulator 7.4 Discharge Line Thermistor All (-)P20 EcoNet™ enabled variable speed heat pumps are equipped with an accumulator for (-)P20 heat pumps are equipped with a discharge the purpose of managing possible refrigerant line thermistor that is used to measure the flood back issues that may occur at abnormal compressor discharge temperature.

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

    7.0 COMPONENTS & CONTROLS 7.5 EcoNet Variable Speed Outdoor Control (VSODC) ™ 7.5.1 Board Features and 4. Outdoor PSC Fan relay connections Connections 5. Outdoor ambient thermistor connection 6. Coil sensor (EVAPIN) and suction thermistor (OST) connections (-)P20 heat pumps are equipped with a Variable Speed Outdoor Control (VSODC) that interfaces 7.

  • Page 35: Test & Sw2 Buttons

    7.0 COMPONENTS & CONTROLS 7.5 EcoNet Variable Speed Outdoor Control (VSODC) (cont.) ™ 7.5.2 TEST and SW2 Buttons 7.5.3 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 7.5 EcoNet Variable Speed Outdoor Control (VSODC) (cont.) ™ IMPORTANT: 7.5.7 Menu Structure This mode should be manually exited. If this menu is not exited manually The (-)P20 product line is equipped with a dual the VSODC will wait 24 hours before returning to 7-segment LED display and two push buttons normal operation.

  • Page 37: Electronic Expansion Valve

    7.0 COMPONENTS & CONTROLS 7.6 Electronic Expansion Valve (-)P20 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 7.8 High Pressure 7.11 Outdoor Ambient Control (HPC) Temperature Sensor Sensing of the compressor discharge pressure is The outdoor ambient temperature is sensed by a accomplished by a conventional automatic reset thermistor located directly underneath the control pressure control that is brazed into the compressor box where it is shielded from direct sunlight.

  • Page 39: Suction Pressure Transducer

    7.0 COMPONENTS & CONTROLS meet the capacity demand as long as the operat- ing conditions remain within the safe operating range of the compressor and inverter. 1. High voltage input (L1 – Black; L2 – Yellow) ➅ 2. Ground connection 3.

  • Page 40: Active System Protection Features

    8.0 ACTIVE SYSTEM PROTECTION FEATURES The controls found in the (-)P20 heat pumps are the Inverter will gradually increase the compressor designed to prevent the system from operating RPM until the compressor returns to normal in under conditions that could be harmful to the speed based on the capacity demand.

  • Page 41: Compressor Shut-Down Sequence For High Or Low Refrigerant Pressure Fault

    8.0 ACTIVE SYSTEM PROTECTION FEATURES 8.8 Overcurrent and If there are 3 low pressure faults in the same call for cooling or during 120 minutes of continuous Current Imbalance heating operation, the VSODC will lock the compressor out and flash a 21L fault code and If the compressor current exceeds an acceptable the EcoNet Control Center will display a Low...

  • Page 42: Sensor Failure Default Operation

    8.0 ACTIVE SYSTEM PROTECTION FEATURES 8.13 Sensor Failure Default Operation If the controls sense an externally connected code will be displayed on the EcoNet Control sensor has failed, the system will enter a fail safe Center and Variable Speed Outdoor Control operating mode and will continue to condition the identifying which sensor has failed.

  • Page 43: Diagnostics And Troubleshooting

    9.0 DIAGNOSTICS & TROUBLESHOOTING Advanced operating status and diagnostic 2) The compressor will start and the outdoor fan information is available through the Variable Speed will operate. Outdoor Control dual 7-segment display and the 3) The display will change to a steady “c,” “C,” EcoNet Control Center that greatly enhances the “h,”...

  • 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 – LEDs Display Status Code Description NOTE: Codes must be read from correct side to avoid an error in reading codes. Troubleshooting Information Code Dual 7-Segment...
  • 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.) IMPORTANT: L15 – PIM Over-temp – T908_O Inverter Fault This mode of active If the inverter detects an over temperature protection must be manually reset. 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 (cont.) 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.) IMPORTANT: and flash an ”L” on the dual 7-segment LEDs This mode of active followed by a 16. 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 (cont.) 16 – HP Sensor Not Configured – T926_O If the inverter is not configured or does not hold Active Protection – Code 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 (cont.) 83 – Evaporator Temperature Thermistor Failure D1 – Memory Card Configuration Data Write – T953_O Failure – A951_O If the VSODC identifies an issue with the If the VSODC identifies issue(s) writing the model Evaporator Temperature Thermistor (EVAPIN) data from the memory card, the VSODC will sensor the VSODC will flash an 83 on the dual...

  • 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 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 Apply resistance measurements to the chart found the 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 [-15° – -9°C] Charging Chart Overcharge Undercharge Liquid Restriction (Drier) Dirty Outdoor Coil Low Outdoor Ambient Temperature Compressor Indoor Suction Pressure Transducer...

  • 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 on and between the aluminum fins.

  • Page 74: Wiring Diagram

    11.0 WIRING DIAGRAM UTIL UTIL 2...

  • Page 75: Appendix

    12.0 APPENDIX 12.1 Agency Performance Audit Test Instructions Performance audit testing a (-)P20 variable c. To turn dehumidification off press the orange speed heat pump rated combination requires up or blue down arrows once. an EcoNet™ Control Center (according to the d.
  • 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”...

This manual is also suitable for:

Econet rp2036bjvcaEconet rp2060bjvcaEconet rp2048bjvca

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