Installation Instructions
Contents
1. OFF lt Cooling Demand gt lt 1 min Profile B ramps up to full cooling demand airflow by first stepping up to 50 of the full demand for 30 seconds The motor then ramps to 100 of the required airflow Aone 1 minute OFF delay at 100 of the cooling airflow m 100 CFM gt OFF min gt 100 CFM 50 CFM gt lt 1 2 min Cooling Demand Profile C ramps up to 82 of the full cooling demand airflow a operates there for approximately 7 1 2 minutes The motor then steps up to the full demand airflow Profile C also has a one 1 minute 100 OFF delay OFF K 100 CFM 100 CFM 82 CFM FF 7 1 2 min 1 min Cooling Demand Profile D ramps up to 50 of the demand for 1 2 minute then ramps to 82 of the full cooling demand airflow and operates there for approximately 7 1 2 minutes The motor then steps up to the full demand airflow Profile D has a 1 2 minute at 50 airflow OFF OFF delay OFF 82 CFM gt 100 CFM 50 CEM OFF 7 1 2 min 1 2 min gt Cooling Demand Airflow Tables STATUS The current system operational mode and requested indoor CFM is reported in this menu This information can be used for troubleshooting purposes Heat Set Up This menu allows for the adjustment of several heating performance variables Heat Airflow Trim range from 10 to 10 in 2 increments Heat Fan ON Delay2. TROUBLESHOOTING INFORMATION UNITARY DIAGNOSTIC CODES UNITARY DIAGNOSTIC CODES Symptoms of Abnormal Operation Legacy amp ComfortNet Thermostat e Air conditioner heat pump fails to operate e Integrated control module diagnostic status LED display shows the indicated code e ComfortNet thermostat displays error message e Air conditioner heat pump fails to operate e Integrated control module diagnostic status LED display shows the indicated code e ComfortNet thermostat displays error message e Air conditioner heat pump fails to operate e Air conditioner heat pump operating at reduced performance e Air conditioner heat pump operating at low stage when expected to operate at high stage e Integrated control module diagnostic status LED display shows the indicated code e ComfortNet thermostat displays error message Diagnostic Status LED Display Codes Digit 3 Digit 2 Digit 1 Fault Description e Data not yet on Network e Invalid Data on Network e System Mis Match ComfortNet Thermostat Only Message NO NET DATA INVALID d1 DATA INVALID d2 SYSTEM 17 Corrective Actions Possible Causes e Air conditioner heat pump is wired as part of a communicating system and integrated control module does not contain any shared data e Verify system type communicating or legacy e Populate shared data using memory card e Wire system as
3. Inefficient Compressor Test Compressor Efficiency Wrong Type Expansion Valve Expansion Device Restricted Replace Valve Remove Restriction or Replace Expansion Device Oversized Expansion Valve Undersized Expansion Valve Expansion Valve Bulb Loose Replace Valve Replace Valve Tighten Bulb Bracket Inoperative Expansion Valve Check Valve Operation Loose Hold down Bolts Tighten Bolts Faulty Reversing Valve Replace Valve or Solenoid Faulty Defrost Control Test Control Faulty Defrost Thermostat Test Defrost Thermostat Cooling or Heating Cycle Heat Pump Check Flowrator amp Seat or Replace Flowrator Heating Cycle Only Heat Pump For detailed service information refer to the Remote Condensing Unit Service manual 15 Symptoms of Abnormal Operation Legacy amp ComfortNet Thermostat e Integrated control module diagnostic status LED display shows the indicated code ComfortNet thermostat displays in the temperature display area Heat pump fails to operate in heating mode Integrated control module diagnostic status LED display shows the indicated code ComfortNet thermostat displays error message Air conditioner heat pump fails to operate Integrated control module diagnostic status LED display shows the indicated code Air conditioner heat pump fails to operate Integrated co
4. Heat Fan OFF Delay Defrost Interval and Compressor Delay can be adjusted in this menu Defrost Interval determines the amount of compressor run time between defrost cycles Compressor delay selects a compressor off time after a reversing valve shift Air ConbITIONER HEaT Pump ADVANCED Features MENU CONFIGURATION Submenulem Indication for Display Only not User Modifiable Number of AC Stages CL STG Displays the number of air conditioning stages applies to AC and Number of HP Stages HT STG Displays the number of heat pump stages applies to HP only AC Tonnage TONS Displays the air conditioning tonnage applies to AC and HP DIAGNOSTICS Clear Fault History CLEAR NO or YES oo ee NOTE Consecutively repeated faults are shown a maximum of 3 times __Submenuttlem __ indication for Display Only not User Modifiable __ Submenu Item___ __User Modifiable Options Outdoor Air Temperature Displays the outdoor air Sensor may or may not be available on an AIR TMP temperature air conditioner Check air conditioner instructions for details Outdoor Coil Temperature Displays the outdoor coll Required for heat pump operation COIL TMP temperature COOL SET UP _Submenultem User Modifiable Options Comments _____ Cool Airflow Trim 10 to 10 in 2 increments Selects the airflow trim amount applies to Cool Airflow Profile A B C or D default is D Selects the airflow profile applies to air corny ID
5. Test Motor Windings Compressor Stuck Use Test Cord Faulty Compressor Contactor Faulty Fan Relay Test Continuity of Coil amp Contacts Test Continuity of Coil And Contacts Open Control Circuit Test Control Circuit with Voltmeter Low Voltage Test Voltage Faulty Evap Fan Motor Shorted or Grounded Fan Motor Repair or Replace Test Motor Windings Improper Cooling Anticipator Check Resistance of Anticipator Shortage of Refrigerant Test For Leaks Add Refrigerant Restricted Liquid Line Open Element or Limit on Elec Heater Remove Restriction Replace Restricted Part Test Heater Element and Controls Dirty Air Filter Inspect Filter Clean or Replace Dirty Indoor Coil Not enough air across Indoor Coil Inspect Coil Clean Check Blower Speed Duct Static Press Filter Too much air across Indoor Coil Reduce Blower Speed Overcharge of Refrigerant Recover Part of Charge Dirty Outdoor Coil Noncondensibles Inspect Coil Clean Recover Charge Evacuate Recharge Recirculation of Condensing Air Remove Obstruction to Air Flow Infiltration of Outdoor Air Check Windows Doors Vent Fans Etc Improperly Located Thermostat Air Flow Unbalanced Relocate Thermostat Readjust Air Volume Dampers System Undersized Refigure Cooling Load Broken Internal Parts Replace Compressor Broken Valves Test Compressor Efficiency
6. legacy system Air conditioner heat pump is wired as part of a communicating system and integrated control module contains invalid shared data or network data is invalid for the integrated control module e Verify system type communicating or legacy e Populate correct shared data using memory card e Wire system as legacy system Air conditioner e Verify system type heat pump is communicating wired as part of or legacy a communicating Verify shared system and data is correct outdoor unit for your specific requires airflow model re greater than populate data if indoor unit s required airflow capability e Wire system as Shared data is legacy system incompatible with the system or missing parameters Notes amp Cautions e Turn power OFF prior to repair e Use memory card for your specific model e Insert memory card BEFORE turning power ON Memory card may be removed after data is loaded Turn power OFF before removing memory card Error code will be cleared once data is loaded Applies only to fully communicating system using ComfortNet thermostat Turn power OFF prior to repair Use memory card for your specific model Insert memory card BEFORE turning power ON Memory card may be removed after data is loaded Turn power OFF before removing memory card Error code will be cleared once data is loaded Applies only to fully communicating system using
7. mand along with a fan request to the indoor unit The indoor unit then sends the demand to the ECM motor The table below lists the various ComfortNet systems the operating mode and airflow demand source For example assume the system is a heat pump matched with an air handler With a call for low stage cooling the heat pump will calculate the system s low stage cooling airflow demand The heat pump will then send a fan request along with the low stage cooling airflow demand to the air handler Once received the air handler will send the low stage cooling airflow demand to the ECM motor The ECM motor then deliv ers the low stage cooling airflow The table at right lists the nominal high and low stage airflow for the ComfortNet heat pumps System System Airflow Demand ysie Operating Mode Source Heat Pump Heating Heat Pump Only Heat Pump Air HP Electric Heat gt of Heat Pump or Air Handler Strips Handler Demand Electric Heat Strips Air Handler Only Thermostat Heat Pump Heating Heat Pump Only C coon Heating mon tow mon Low szoa soo eo so f eoo Continuous Fan Heat Pump Furnace CTKO WIRING NOTE Refer to section Electrical Connections High Voltage Connections for 208 230 volt line connections to the air conditioner or heat pump NOTE A removable plug connector is provided with the control to make thermostat wire connections This plug may be removed wire connections made to the p
8. 1 or Check data 1 data 2 data 2 wires and R voltages 24VAC or C 24VAC common 14 TROUBLESHOOTING INFORMATION CONDENSING UNIT System Operating Pressures Complaint No Cooling Unsatisfactory Cooling Heating POSSIBLE CAUSE DOTS IN ANALYSIS GUIDE INDICATE POSSIBLE CAUSE SYMPTOM System will not start Compressor will not start fan runs Comp and Cond Fan will not start Evaporator fan will not start Condenser fan will not start Compressor runs goes off on overload Compressor cycles on overload System runs continuously little cooling htg Too cool and then too warm Not cool enough on warm days Certain areas too cool others too warm Compressor is noisy System runs blows cold air in heating Unit will not terminate defrost Unit will not defrost Low suction pressure Low head pressure High suction pressure High head pressure Test Method Remedy Test Voltage nspect Fuse Size amp Type Unbalanced Power 3PH Test Voltage Loose Connection nspect Connection Tighten Shorted or Broken Wires Open Fan Overload Test Circuits With Ohmmeter Test Continuity of Overload Faulty Thermostat Test Continuity of Thermostat amp Wiring Faulty Transformer Check Control Circuit with Voltmeter Shorted or Open Capacitor Internal Compressor Overload Open Test Capacitor Test Continuity of Overload Shorted or Grounded Compressor
9. Communications Depress and hold for 2 LED seconds for an out of box reset 2 Flashes Out of box reset Control power up None Learn button depressed No power No power to furnace Check fuses and circuit Turn power OFF prior to breakers replace reset repair Communications error Open fuse Replace blown fuse Communications error Check for shorts in low voltage wiring in heat pump system Reset network by depressing learn button Check data 1 data 2 voltages 1 Steady Flash No network found Broken disconnected data Check communications Turn power OFF prior to wire s wiring data 1 data 2 repair wires Heat pump is installed as a Check wire connections at e Verify wires at terminal legacy traditional system terminal block blocks are securely twisted together prior to inserting into terminal block Green Receive LED Verify heat pump installation type legacy traditional or communicating Check data 1 data 2 voltages Rapid Flashing Normal network traffic Control is talking on network as expected On Solid Data 1 Data 2 miss wire gt Data 1 and data 2 wires reversed Check communications Turn power OFF prior to at heat pump thermostat or wiring data 1 data 2 repair CT compatible indoor unit wires Short between data 1 and Check wire connections at e Verify wires at terminal data 2 wires terminal block blocks are securely twisted together prior to inserting into terminal block Short between data
10. Restriction in needed e Must clear fault by trip 3 times within same 3 Trips liquid line e Check for cycling 24VAC to thermostat demand e Indoor blower restricted liquid control e Thermostat demand is motor failure line repair replace Replace with correct present e Indoor as needed replacement part s e Integrated control thermostat set fe Check indoor module diagnostic status extremely low blower motor LED display shows the repair replace as indicated code needed ComfortNet thermostat e Check low displays error message pressure switch repair replace as needed e Check indoor thermostat setting Four consecutive HIGH SIDE e Blocked e Check and clean e Turn power OFF prior compressor protector trips FAULT condenser coil condenser coil to repair with average run time e Outdoor fan not j Check outdoor e Fault will clear after 4 between trips greater than running or repair consecutive normal 1 minute and less than 15 replace as cycles minutes needed e Fault may be cleared Low pressure and high e Check outdoor by cycling 24VAC to pressure switches are fan motor wiring control closed repair replace as Replace with correct Integrated control replacement part s module diagnostic status outdoor LED display shows the or indicated code capacitor replace as needed e Compressor and outdoor e High HPS OPEN 02 e Blocked e Check and clean e Turn power OFF prior fan are off Pressure condenser
11. The faults may be cleared by depressing the button for greater than five seconds Consecutively repeated faults are displayed a maximum of three times Refer to the fault code definitions atthe end of this manual for more details 6 A forced defrost can be initiated by pressing TEST and RECALL push buttons simultaneously for more than 1 second with a valid call for heat The forced defrost can be terminated by A 10 minute lapse in time A coil temperature rise above 75 F or By pressing the two buttons again for more than 1 second ComForTNet SYSTEM OVERVIEW The ComfortNet system or CT system is a system that in cludes a ComfortNet compatible air handler furnace modular blower and air conditioner or heat pump with a CTKO thermo stat Any other system configurations are considered invalid ComfortNet systems and must be connected as a traditional or legacy system The following table compares the valid CT systems CT compatible Air Handler Fumace Modular Blower CT compatible Full CT system Air Conditioner benefits amp features CT compatible Heat Pump CT compatible Air Handler Fumace Modular Blower Full CT system benefits amp features A ComfortNet heating air conditioning system differs from a legacy traditional system in the manner in which the indoor unit outdoor unit and thermostat interact with one another In a traditional system the thermostat sends commands to the indoor and ou
12. any tube can melt the tube Service personnel must use the appropriate heat level for the size of the tube being brazed NOTE The use of a heat shield when brazing is recommended to avoid burning the serial plate or the finish on the unit other condition increases the chance of a refrigerant leak The ends of the refrigerant lines must be cut square deburred cleaned and be round and free from nicks or dents Any Sweep the refrigerant line with nitrogen or inert gas during brazing to prevent the formation of copper oxide inside the refrigerant lines The POE oils used in R 410A applications will clean any copper oxide present from the inside of the refrigerant lines and spread it throughout the system This may cause a blockage or failure of the metering device After brazing quench the joints with water or a wet cloth to prevent overheating of the service valve Ensure the filter drier paint finish is intact after brazing If the paint of the steel filter drier has been burned or chipped repaint or treat with a rust preventative This is especially important on suction line filter driers which are continually wet when the unit is operating NOTE Be careful not to kink or dent refrigerant lines Kinked or dented lines will cause poor performance or compressor damage Do NOT make final refrigerant line connection until plugs are removed from refrigerant tubing NOTE Before brazing verify indoor TXV is correct for R410A and p
13. out of range Check circuit e Turn power OFF prior e Compressor and outdoor BLANK e Open Circuit OPEN e Power is fan are off f or greater than CIRCUIT disconnected breakers and to repair 4 hours i fuses e Fault will clear after 1 e Low pressure and high compressor Check wiring normal cycle pressure switches are protector to unit repair e Fault may be cleared closed e Compressor not replace as by cycling 24VAC to e Integrated control properly wired to needed control module diagnostic status control Check e Replace with correct LED display shows the compressor replacement part s indicated code repair replace as e ComfortNet thermostat needed displays error message Check compressor wiring repair replace as needed e Compressor and outdoor BLANK 6 e Open Start OPEN Compressor start Check e Turn power OFF prior fan are off Circuit START winding is open compressor to repair e Low pressure and high e Failed repair replace as e Fault will clear after 1 pressure switches are compressor run needed normal cycle closed capacitor e Check run e Fault may be cleared e Integrated control e Faulty run capacitor replace by cycling 24VAC to module diagnostic status capacitor wiring as needed control LED display shows the e Compressor not fe Check wiring e Replace will correct indicated code properly wired to repair replace as replacement part s e ComfortNet thermostat control needed d
14. 249 5079 Unit Line Diameter In OD Tons Suct Liq Suct Liq Suct Liq Lines greater than 79 feet in length or vertical elevation changes more than 50 feet refer to the Remote Cooling Service Manual or contact your distributor for assistance Insulation is necessary to prevent condensation from forming and dropping from the suction line Armaflex or satisfactory equivalent with 3 8 min wall thickness is recommended In severe conditions hot high humidity areas 1 2 insulation may be required Insulation must be installed in a manner which protects tubing from damage and contamination Where possible drain as much residual compressor oil from existing systems lines and traps pay close attention to low areas where oil may collect NOTE If changing refrigerant types ensure the indoor coil and metering device is compatible with the type of refrigerant being used otherwise the indoor coil must be replaced BuryinG REFRIGERANT LINES If burying refrigerant lines can not be avoided use the following checklist 1 2 Insulate liquid and suction lines separately Enclose all underground portions of the refrigerant lines in waterproof material conduit or pipe sealing the ends where tubing enters exits the enclosure If the lines must pass under or through a concrete slab ensure lines are adequately protected and sealed REFRIGERANT LINE CONNECTIONS IMPORTANT To avoid overheating the service valve TX
15. CON D ENSI NG U N IT 2009 2014 Goodman Manufacturing Company L P 5151 San Felipe Suite 500 Houston TX 77056 HEAT PUMP www goodmanmfg com or www amana hac com INSTALLATION amp SERVICE REFERENCE P N 10 348M Date September 2014 IMPORTANT SAFETY INSTRUCTIONS The following symbols and labels are used throughout this manual A WARNING to indicate immediate or potential safety hazards It is the HIGH VOLTAGE owner s and installer s responsibility to read and comply with all DISCONNECT ALL Sanne N safety information and instructions accompanying these sym POWER BEFORE sly bols Failure to heed safety information increases the risk of MULTIPLE POWER SOURCES MAY BE PRESENT FAILURE w personal injury property damage and or product damage TODO SO MAY CAUSE PROFERTY DAMAGE PERSONAL INJURY OR DEATH SHIPPING NSPECTION Always keep the unit upright laying the unit on its side or top may cause equipment damage Shipping damage and subse A warnine quent investigation is the responsibility of the carrier Verify the model number specifications electrical characteristics and ac cessories are correct prior to installation The distributor or manu facturer will not accept claims from dealers for transportation CONDITIONING HEATING AND REFRIGERATION INSTITUTE AHRI MAY ONLY INDIVIDUALS MEETING THE REQUIREMENTS OF AN ENTRY LEVEL TECHNIGAN AT A MINIMUM AS SPECFIED BY THE AIR damage or installation of incorrectly ship
16. ComfortNet thermostat Turn power OFF prior to repair Use memory card for your specific model Insert memory card BEFORE turning power ON Memory card may be removed after data is loaded Turn power OFF before removing memory card Error code will be cleared once data is loaded Applies only to fully communicating system using ComfortNet thermostat TROUBLESHOOTING INFORMATION UNITARY DIAGNOSTIC CODES UNITARY DIAGNOSTIC CODES Symptoms of Abnormal Operation Legacy amp ComfortNet Thermostat e Air conditioner heat pump fails to operate e Integrated control module diagnostic status LED display shows the indicated code e ComfortNet thermostat displays error message e Air conditioner heat pump fails to operate e Integrated control module diagnostic status LED display shows the indicated code ComfortNet thermostat displays error message Very long run time Four consecutive compressor protector trips with average run time between trips greater than 3 hours Compressor operating at high speed and outdoor fan operating at low speed Integrated control module diagnostic status LED display shows the indicated code Compressor and outdoor fan are off Thermostat demand is present Integrated control module diagnostic status LED display shows the indicated code Diagnostic Status LED Display Codes Digit 3 Digit 2 Digit 1 Fault Description e Configurati
17. DATE DOES NOTEXCEED 5 YEARS o ENSURE THE PRESSURE RATING MEETS OREXCEEDS 400 PSIG WHEN IN DOUBT DO NOTUSE CYLINDER A warnine REFRIGERANTS ARE HEAVIER THAN AIR THEY CAN PUSH OUT THE OXYGEN IN YOUR LUNGS OR IN ANY ENCLOSED SPACE TO AVOID POSSIBLE DIFFICULTY IN BREATHING OR DEATH e NEVER PURGE REFRIGERANT INTO AN ENCLOSED ROOM OR SPACE BY LAW ALLREFRIGERANTS MUST BERECLAIMED e FAN INDOOR LEAKIS SUSPECTED THOROUGHLY VENTILATE THE AREA BEFORE BEGINNING WORK e LIQUID REFRIGERANT CAN BEVERY COLD TO AVOID POSSIBLE FROST BITE OR BLINDNESS AVOID CONTACT AND WEAR GLOVES AND GOGGLES IF LIQUID REFRIGERANT DOES CONTACT YOUR SKIN OR EYES SEEK MEDICAL HELP IMMEDIATELY ALWAYSFOLLOW EPA REGULATIONS NEVER BURN REFRIGERANT AS POISONOUS GAS WILL BE PRODUCED REFRIGERANT LINES Use only refrigerant grade dehydrated and sealed copper tub ing to connect the condensing unit with the indoor evaporator After cutting the tubing install plugs to keep refrigerant tubing clean and dry prior to and during installation Tubing should always be cut square keeping ends round and free from burrs Clean the tubing to prevent contamination Do NOT let refrigerant lines come in direct contact with plumb ing ductwork floor joists wall studs floors and walls When running refrigerant lines through a foundation or wall openings should allow for sound and vibration absorbing material to be placed or installed between tubing and foun
18. ITIONING AND HEAT PUMP HOMEOWNER S ROUTINE MAINTENANCE RECOMMENDATIONS We strongly recommend a bi annual maintenance checkup be performed before the heating and cooling seasons begin by a qualified servicer Replace or Clean Filter IMPORTANT NOTE Never operate unit without a filter installed as dust and lint will build up on internal parts resulting in loss of efficiency equipment damage and possible fire An indoor air filter must be used with your comfort system A properly maintained filter will keep the indoor coil of your comfort system clean A dirty coil could cause poor operation and or severe equipment damage Your air filter or filters could be located in your furnace in a blower unit or in filter grilles in your ceiling or walls The installer of your air conditioner or heat pump can tell you where your filter s are and how to clean or replace them Check your filter s at least once a month When they are dirty replace or clean as required Disposable type filters should be replaced Reusable type filters may be cleaned You may want to ask your dealer about high efficiency filters High efficiency filters are available in both electronic and non electronic types These filters can do a better job of catching small airborne particles Compressor The compressor motor is hermetically sealed and does not require additional oiling Motors Indoor and outdoor fan motors are permanently lubricated and do not require a
19. PORTABLE MACHINES CANNOT CLEAN USED FAILURE TO FOLLOW PROPER PROCEDURES MAY CAUSE PROPERTY REFRIGERANT TO MEET AHRI STANDARDS DAMAGE PERSONAL INJURY OR DEATH NOTICE VIOLATION OF EPA REGULATIONS MAY RESULT IN FINES OR OTHER Ay caution OPERATING THE COMPRESSOR WITH THE SUCTION VALVE CLOSED MAY CAUSE SERIOUS COMPRESSOR DAMAGE PENALTIES FINAL CHARGE ADJUSTMENT The outdoor temperature must be 60 F or higher Set the room thermostat to COOL fan switch to AUTO and set the tempera ture control well below room temperature After system has stabilized per startup instructions check subcooling and superheat as detailed in the following section SATURATED SUCTION PRESSURE SATURATED LIQUID PRESSURE TEMPERATURE CHART TEMPERATURE CHART SATURATED SUCTION SATURATED LIQUID SUCTION PRESSURE TEMPERATURE F LIQUID PRESSURE TEMPERATURE psig R2 Rao EXPANSION VALVE SYSTEM A CAUTION NOTE Units matched with indoor coils equipped with TO PREVENT PERSONAL INJURY CAREFULLY CONNECT AND DISCONNECT non adjustable TXV should be charged by subcooling MANIFOLD GAUGE HOSES ESCAPING LIQUID REFRIGERANT CAN CAUSE only BURNS DO NOT VENT REFRIGERANT INTO THE ATMOSPHERE RECOVER Run the unit on low stage cooling for 10 minutes until refriger ALL REFRIGERANT DURING SYSTEM REPAIR AND BEFORE ANAL UNIT ant pressures stabilize Use the following guidelines and meth _ DISPOSAL ods to check unit operation and ensure that the refrigeran
20. SHOOTING INFORMATION UNITARY DIAGNOSTIC CODES Corrective Actions e Check sensor connection e Replace open shorted sensor e Check sensor connection e Replace open shorted sensor e Locate and correct short in low voltage wiring e Replace control e Check indoor blower motor e Check indoor blower motor wiring e Check indoor unit control e Repair replace any faulty wiring e Repair replace indoor blower motor or control e Check indoor blower motor e Check filters clean replace as needed e Check ductwork resize as needed e Verify indoor and outdoor units are properly matched Notes amp Cautions e Turn power OFF prior to repair e Replace with correct replacement part e Turn power OFF prior to repair e Replace with correct replacement part e Turn power OFF prior to repair e Replace fuse with 3 amp automotive type e Turn power OFF prior to repair e Replace with correct replacement part e Turn power OFF prior to repair e Applies only to fully communicating system using ComfortNet thermostat e Replace with correct replacement part e Turn power OFF prior to repair e Applies only to fully communicating system using ComfortNet thermostat e Replace with correct replacement part See specification sheet s for airflow requirements and maximum external static pressure e See specification sheets for approved system matches
21. V valve or filter drier while brazing wrap the component with a wet rag or use a thermal heat trap compound Be sure to follow the manufacturer s instruction when using the heat trap compound Note Remove Schrader valves from service valves before brazing tubes to the valves Use a brazing alloy of 2 minimum silver content Do not use flux Torch heat required to braze tubes of various sizes is proportional to the size of the tube Tubes of smaller size Liquid Line Oo Ss Suction Line l i Mounting the evaporator coil above the Ai condensing unit will require an inverted loop in the suction line adjacent or near the connection to the evaporator The top of the loop must be slightly higher than the top of the coil Mounting the condensing unit above the evaporator coil will not require an oil trap in the suction line at the evaporator except when the condensing unit is over 80 feet above the evaporator Refer to the latest revision of long line set guidelines TP 107 of z require less heat to bring the tube to brazing temperature before adding brazing alloy Applying too much heat to
22. ble Causes Message OPEN RUN OPEN RUN LOCK LOW LINE VOLT 21 e Open Start Circuit Lockout e Compressor start Check winding is open compressor e Failed repair replace as compressor run needed capacitor e Check run e Faulty run capacitor wiring e Compressor not properly wired to control e Faulty compressor wiring as needed e Check wiring repair replaced as needed e Check compressor repair replace as needed e Check wiring repair replace as needed e Open Run Circuit e Compressor run winding is open e Compressor not properly wired to control e Faulty compressor wiring e Open Run 07 f Compressor run Circuit winding is open Lockout e Check compres sor repair re place as needed e Check wiring repair replace as needed Compressor not properly wired to control e Faulty compressor wiring e Check circuit breakers and fuses e Verify unit is connected to power supply as specified on rating plate e Correct low line voltage condition contact local utility if needed e Low Line Voltage e Low line voltage Notes amp Cautions e Turn power OFF prior to repair e Must clear fault by cycling 24VAC to control capacitor replace e Replace with correct replacement part s e Turn power OFF prior to repair e Fault will clear after 1 normal cycle e Fault may be cycling 24VAC to control e Replace with correct repla
23. cement part s e Turn power OFF prior to repair e Must clear fault by cy cling 24VAC to control e Replace with correct replacement part s e Turn power OFF prior to repair e Control detects line voltage less than 185 VAC Fault will clear if line voltage increases above 185 VAC TROUBLESHOOTING INFORMATION UNITARY DIAGNOSTIC CODES UNITARY DIAGNOSTIC CODES Symptoms of Diagnostic Status ComfortNet Abnormal Operation LED Display Codes Fault Thermostat Only Possible Corrective Notes amp Legacy amp ComfortNet Description Causes Actions Cautions Message Digit 2 Digit 1 e Air conditioner heat e High Line HIGH LINE e High line e Correct high line e Turn power OFF prior pump may appear to be Voltage VOLT voltage voltage condition to repair operating normally contact local utility e Control detects line e Compressor protector if needed voltage greater than may be open compressor e Verify unit is 255 VAC and outdoor fan off connected to power e Fault will clear if line e Integrated control supply as specified voltage decreases module diagnostic status on rating plate below 255 VAC LED display shows the indicated code e Air conditioner heat i e Control detects Check fuse e Turn power OFF prior to pump may appear to be secondary e Correct low second repair operating normally voltage less ary voltage condition e Fault will clear if e Integrated control than 18 VAC e Check transfo
24. coil condenser coil to repair Thermostat demand is Cut Out e Outdoor fan not e Check outdoor _ Replace with correct present Trip running or repair replacement part s Integrated control replace as module diagnostic status needed LED display shows the e Check outdoor indicated code fan motor wiring repair replace as outdoor or capacitor replace as needed Compressor and outdoor e High HPS e Blocked e Check and clean e Turn power OFF prior fan are off Pressure LOCKOUT condenser coil condenser coil to repair e Low pressure switch Cut Out e Outdoor fan not je Check outdoor Must clear fault by trip 3 times within same Lockout running fan motor repair cycling 24VAC to thermostat demand 3 Trips replace as control Thermostat demand is needed e Replace with correct present e Check outdoor replacement part s Integrated control fan motor wiring module diagnostic status repair replace as LED display shows the needed indicated code e Check outdoor e ComfortNet thermostat fan motor displays error message capacitor replace as needed 19 TROUBLESHOOTING INFORMATION UNITARY DIAGNOSTIC CODES UNITARY DIAGNOSTIC CODES Symptoms of Diagnostic Status ComfortNet Abnormal Operation LED Display Codes Fault Thermostat Only Possible Corrective Notes amp Legacy amp ComfortNet TE ae 7E Description Causes Actions Cautions e Run time for last 4 cycles BLANK 3 e Short Cycling e Intermit
25. conitoneronye Cool ON Delay 5 10 20 or 30 seconds default Selects the indoor blower ON delay Cool OFF Delay 30 60 90 or 120 seconds Selects the indoor blower OFF delay Dehumidification Select ON or OFF default is OFF Selecting OFF disables dehumidification DEHUM selecting ON enables dehumidification applies to air conditioner only Air ConpiTioneR HEAT Pump ADVANCED FEATURES Menu CONT D STATUS Indication for Display Only not User Modifiable Mode MODE Displays the current air conditioner operating mode CFM CFM Displays the airflow for the current operating mode HEAT SET UP User Modifiable Options Heat Airflow Trim 10 to 10 in 2 increments Selects the airflow trim amount applies to HT TRM default is 0 heat pump only Heat ON Delay 5 10 or 15 seconds default is 5 Selects the indoor blower heat ON delay Heat OFF Delay 30 50 70 or 90 seconds default Selects the indoor blower heat OFF delay Defrost Interval 30 60 90 or 120 minutes Selects the time interval between defrosts Compressor Delay 0 5 15 or 30 seconds default is Selects the compressor off time after a CMP DLY 30 seconds reversing valve shift applies to heat pump only THERMOSTAT MENU If this heat pump is installed with a CT compatible furnace the system is recognized as a dual fuel system The balance point temperature should be set via the thermostat See thermostat instruction manual for details on h
26. dation Any gap between foundation or wall and refrigerant lines should be filled with a pliable silicon based caulk RTV or a vibration damping material Avoid suspending refrigerant tubing from joists and studs with rigid wire or straps that would come in contact with the tubing Use an insulated or suspension type hanger Keep both lines separate and always insulate the suction line These sizes are suitable for line lengths of 79 feet or less Ifa run of more than eighty feet is required refer to Remote Cool ing Service Manual or TP 106 Long Line SetApplication R 22 or TP 107 Long Line Set Application R 410A or contact your distributor for assistance A warnine TO AVOID POSSIBLE EXPLOSION e NEVERAPPLY FLAME ORSTEAM TO A REFRIGERANT CYLINDER IF YOU MUST HEAT A CYLINDER FOR FASTER CHARGING PARTIALLY IMMERSE IT IN WARM WATER e NEVERALLA CYLINDER MORE THAN 807FULL OF LIQUID REFRIGERANT e NEVERADD ANYTHING OTHER THAN R 22 TO AN R 22 CYLINDER OR R 410A To AN R 4110A CYLINDER THE SERVICE EQUIPMENT USED MUST BELISTEDOR CERTIFIED FOR THE TYPE OF REFRIGERANT USED e STORE CYLINDERSIN A COOL DRY PLACE NEVER USEA CYLINDER ASA PLATFORM OR A ROLLER Ay caution THE COMPRESSOR POE OIL FOR R 4 10A UNITS IS EXTREMELY SUSCEPTIBLE TO MOISTURE ABSORPTION AND COULD CAUSE COMPRESSOR FAILURE DO NOT LEAVE SYSTEM OPEN TO ATMOSPHERE ANY LONGER THAN NECESSARY FOR INSTALLATION RECOMMENDED INTERCONNECTING TUBING Ft Cond 0 24
27. dditional oiling Clean Outside Coil Qualified Servicer Only Air must be able to flow through the outdoor unit of your com fort system Do not construct a fence near the unit or build a deck or patio over the unit without first discussing your plans with your dealer or other qualified servicer Restricted airflow could lead to poor operation and or severe equipment damage AA WARNING HIGH VOLTAGE sly DISCONNECT ALL POWER BEFORE SERVICING MULTIPLE POWER SOURCES MAY BE PRESENT FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE ap Likewise it is important to keep the outdoor coil clean Dirt PERSONAL INJURY R DEATH leaves or debris could also restrict the airflow If cleaning of the outdoor coil becomes necessary hire a qualified servicer Inexperienced people could easily puncture the tubing in the coil Even a small hole in the tubing could eventually cause a large loss of refrigerant Loss of refrigerant can cause poor operation and or severe equipment damage Do not use a condensing unit cover to protect the outdoor unit during the winter unless you first discuss it with your dealer Any cover used must include breathable fabric to avoid moisture buildup Before Calling Your Servicer e Check the thermostat to confirm that it is properly set e Wait 15 minutes Some devices in the outdoor unit or in programmable thermostats will prevent compressor operation for awhile and then reset automatically Also some power c
28. eaks and tighten valve cores if necessary Install caps finger tight Heat Pump HEATING CYCLE The proper method of charging a heat pump in the heat mode is by weight with the additional charge adjustments for line size line length and other system components For best results on outdoor units with TXVs superheat should be 2 5 at 4 6 from the compressor Make final charge adjustments in the cooling cycle AppimionaL NoTES 1 There are 3 7 segment LED displays on the PCB Refer to the Troubleshooting chart at the end of this manual for definitions of the LED status 2 TERM dip switch is used for communications bus configuration Leave the settings to the factory default position 3 LEARN push button is used in communication mode to support device recognition on start up As the communication system supports automatic identification of both indoor unit and outdoor unit this button is not used for a normal start up 4 Press TEST push button during system Standby mode to turn on both the compressor and outdoor fan for five seconds 5 The RECALL push button is used to retrieve the six most recent faults The control must be in Standby Mode no thermostat inputs to use the feature Depress the push button for approximately two seconds and less than five seconds The 7 segment LED displays will then display the six most recent faults beginning with the most recent fault and decrementing to the least recent fault
29. en to location of the condensing unit s in regard to structures obstructions other units and any all other factors that may interfere with air circulation Where possible the top of the unit should be completely unobstructed however if vertical conditions require placement beneath an ob struction there should be a minimum of 60 inches between the top of the unit and the obstruction s The specified di mensions meet requirements for air circulation only Consult all appropriate regulatory codes prior to determining final clearances RECOMMENDED Another important consideration in selecting a location for the unit s is the angle to obstructions Either side adjacent the valves can be placed toward the structure provided the side away from the structure maintains minimum service clearance Corner in stallations are strongly discouraged This unit can be located at ground floor level or on flat roofs At ground floor level the unit must be on a solid level foundation that will not shift or settle To reduce the possibility of sound transmission the foundation slab should not be in contact with or TA B Cc YT AA be an integral part of the building foundation Ensure the founda tion is sufficient to support the unit Aconcrete slab raised above ground level provides a suitable base ROOFTOP INSTALLATIONS If it is necessary to install this unit on a roof structure ensure the roof struc
30. g requires a nominal 24 VAC 6 VAC 60 Hz minimum 25 VA service from either the indoor or an optional outdoor transformer Low voltage wiring for the condens ing units depends on the thermostat used The unit is designed to work as part of a fully communicating HVAC system utilizing the ComfortNet CTKO thermostat ComfortNet compatible indoor unit and up to four wires The unit also has legacy 24 VAC inputs to support non communi cating systems Route control wires through the low voltage port and terminate in accordance with the wiring diagram provided in side the control panel cover LOW VOLTAGE Voltage Ports PORT NOTE For two stage units refer to the Installation Instructions supplied with the variable speed indoor units for field wiring connections NOTE If the heat pump unit is wired in the communicating mode 60 a 30 60 ia 30 together with a compatible communicating indoor unit and CTKO communicating thermostat then the communicating thermostat is able to search and 60 0 60 0 identify the condensing unit when power is applied to the system Refer to the Installation Manual of the optional communicating thermostat for more 30 Minutes 60 Minutes information Use the dipswitch to select defrost time interval 30 60 90 120 60 E 30 60 30 minutes see chart below 60 E 0 60 0 Factory default setting is 30 minutes The maximum def
31. ices are approved for use e Time delay fuses e HACR type circuit breakers A warnine REFRIGERANT UNDER PRESSURE FAILURE TO FOLLOW PROPER PROCEDURES MAY CAUSE PROPERTY DAMAGE PERSONAL INJURY OR DEATH Ay caution PROLONGED OPERATION AT SUCTION PRESSURES LESS THAN 20 PSIG FOR MORE THAN 5 SECONDS WILL RESULT IN OVERHEATING OF THE SCROLLS AND PERMANENT DAMAGE TO THE SCROLL TIPS DRIVE BEARINGS AND INTERNAL SEAL 5000 4500 4000 LEAK S PRESENT 3500 3000 2500 VACUUM IN MICRONS 2000 CONDENSIBLES OR SMALL LEAK PRESENT 1500 1000 NO LEAKS NO CONDENSIBLES 500 0 1 2 3 4 5 6 7 8 9 10 MINUTES A warnine HIGH VOLTAGE DISCONNECT ALL POWER BEFORE SERVICING MULTIPLE POWER SOURCES MAY BE PRESENT FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE PERSONAL INJURY OR DEATH DUE TO ELECTRIC SHOCK VVIRING MUST CONFORM WITH NEC oR CEC AND ALL LOCAL CODES UNDERSIZED WIRES COULD CAUSE POOR EQUIPMENT PERFORMANCE EQUIPMENT DAMAGE OR FRE A WaRniNG TO AVOID THE RISK OF FIRE OR EQUIPMENT DAMAGE USE COPPER CONDUCTORS These devices have sufficient time delay to permit the motor compressor to start and accelerate its load HIGH VOLTAGE CONNECTIONS Route power supply and ground wires through the high voltage port and terminate in accordance with the wiring diagram provided inside the control panel cover Low VOLTAGE CONNECTIONS Condensing unit control wirin
32. isplays error message e Faulty compressor wiring 20 TROUBLESHOOTING INFORMATION UNITARY DIAGNOSTIC CODES Symptoms of Abnormal Operation Diagnostic Status LED Display Codes Legacy amp ComfortNet e Compressor and outdoor fan are off e Low pressure and high pressure switches are closed e Open start circuit has been detected 4 times with 5 minute delay between each detection e Integrated control module diagnostic status LED display shows the indicated code e ComfortNet thermostat displays error message e Compressor and outdoor fan are off e Low pressure and high pressure switches are closed e Integrated control module diagnostic status LED display shows the indicated code e ComfortNet thermostat displays error message e Compressor and outdoor fan are off e Low pressure and high pressure switches are closed e Open run circuit has been detected 4 times with 5 minute delay between each detection e Integrated control module diagnostic status LED display shows the indicated code e ComfortNet thermostat displays error message e Air conditioner heat pump may appear to be operating normally e Compressor protector may be open compressor and outdoor fan off e Integrated control module diagnostic status LED display shows the indicated code UNITARY DIAGNOSTIC CODES ComfortNet Fault Thermostat Only Description Corrective Actions Possi
33. last six faults detected by the air conditioner heat pump Faults are stored most recent to least recent Any consecutively repeated fault is stored a maximum of three times Example The power supply to the air conditioner heat pump is continuously below 187 VAC The control will only store this fault the first three consecutive times the fault occurs NOTE It is highly recommended that the fault history be cleared after performing maintenance or servicing the heat pump IDENTIFICATION Model Number Serial Number and Software Version are displayed within this menu A model number check will help determine if the equipment shared data is correct for the unit If the model number is not correct even though very rare a memory card is available to load the proper data SENSORS The outdoor ambient temperature and coil temperature are displayed in the Sensor Menu This information can be used for troubleshooting purposes CooL SET UP This menu allows for the adjustment of several cooling performance variables Cool Airflow Trim range from 10 to 10 in 2 increments Cool Airflow Profiles Cool Fan ON Delay Cool Fan OFF Delay and Dehumidification Select enable or disable dehumidification can be adjusted in this menu See the following images showing the four cooling airflow profiles e Profile A default provides only an OFF delay of one 1 minute at 100 of the cooling demand airflow m 100 CFM __ 100 CFM
34. lug and replaced It is strongly recommended that you do not connect multiple wires into a single terminal Wire nuts are recommended to ensure one wire is used for each terminal Failure to do so may result in intermittent operation Typical 18 AWG thermostat wire may be used to wire the system components However communications reliability may be improved by using a high quality shielded twisted pair cable for the data transmission lines In either case 150 feet is the maximum length of wire between indoor unit and outdoor unit or between indoor unit and thermostat CTKO Q Thermostat Four WIRE INDoor AND OutDoor WIRING CT Compatible Air Handler Furnace Modular Blower Integrated Control Module Typical wiring will consist of 4 wires between the indoor unit and outdoor unit and between the indoor unit and thermostat The required wires are a data lines 1 and 2 b thermostat R 24 VAC hot and C 24 VAC com CT Compatible AC HP mon Integrated Control Module Two WireE OutDoor Four WIRe INDoor WIRING mieten Mina dena hoe Wee Two wires only may be utilized between the indoor and out door units For this wiring scheme only the data lines 1 and 2 are required between the indoor and outdoor units A 40VA 208 230 VAC to 24 VAC transformer must be installed in the outdoor unit to provide 24 VAC power to the outdoor unit s electronic control CTKO manual will state if this trans former is optio
35. nal or mandatory Four wires are required be tween the indoor unit and thermostat JONA Eo o ce NOTE Use of the CTKO transformer is recommended if installing a dual fuel system Failure to use the transformer 208 230 vac CTKO OOA Thermostat CT Compatible Air IO O O Blower Integrated Control Module Handler Furnace Modular GORA CT Compatible AC HP Integrated Control Module in the outdoor unit could result in over loading of the furnace transformer System Wiring using Two Wires between Furnace ComrortTNet SYSTEM ADVANCED FEATURES and AC HP and Four Wires between Furnace ny and Thermostat The ComfortNet system permits access to additional sys tem information advanced setup features and advanced di agnostic troubleshooting features These advanced features are organized into a menu structure See thermostat installation manual for directions on how to access the ComfortNet User Menus See following tables for menu layout CONFIGURATION The configuration menu provides functional information about the installed equipment System tonnage and number of cooling and heating stages are displayed within this menu A tonnage check will help determine if the equipment shared data is correct for the unit f the tonnage is not correct even though very rare a memory card is available to load the proper data DIAGNOSTICS Accessing the air conditioner heat pump s diagnostics menu provides ready access to the
36. ntrol module diagnostic status LED display shows the indicated code Air conditioner heat pump fails to operate Integrated control module diagnostic status LED display shows the indicated code ComfortNet thermostat displays error message Air conditioner heat pump operates at reduced performance Air conditioner heat pump operating at low stage when expected to operate at high stage Integrated control module diagnostic status LED display shows the indicated code Diagnostic Status LED Display Codes Digit 2 Digit 1 BLANK SYSTEM TROUBLESHOOTING UNITARY DIAGNOSTIC CODES Fault Description e Outdoor air temp sensor fault e Outdoor coil temp sensor fault e Open fuse e Board mis operation e Circulator blower motor is not running when it should be running e Airflow is lower than demanded ComfortNet Thermostat Only MOTOR NOT RUN LOW ID AIRFLOW INTERNAL 16 Possible Causes e Shorted sensor e Open sensor e Sensor disconnected e Sensor out of range e Shorted sensor e Open sensor e Sensor disconnected e Sensor out of range e Short in low voltage wiring e Compressor relay contacts welded e Indoor blower motor problem e Communications error between indoor and outdoor unit e Indoor blower motor problem e Blocked filters e Restrictive undersized ductwork e Indoor outdoor unit miss match TROUBLE
37. ompanies will install devices which shut off air conditioners for several minutes on hot days If you wait several minutes the unit may begin operation on its own e Check the electrical panel for tripped circuit breakers or failed fuses Reset the circuit breakers or replace fuses as necessary Check the disconnect switch near the indoor furnace or blower to confirm that it is closed Check for obstructions on the outdoor unit Confirm that it has not been covered on the sides or the top Remove any obstruction that can be safely removed If the unit is covered with dirt or debris call a qualified servicer to clean it Check for blockage of the indoor air inlets and outlets Confirm that they are open and have not been blocked by objects rugs curtains or furniture Check the filter If it is dirty clean or replace it Listen for any unusual noise s other than normal operating noise that might be coming from the outdoor unit AA CAUTION TO AVOID THE RISK OF EQUIPMENT DAMAGE OR FIRE INSTALL THE SAME AMPERAGE BREAKER OR FUSE AS YOU ARE REPLACING IF THE CIRCUIT BREAKER OR FUSE SHOULD OPEN AGAIN WITHIN THIRTY DAYS CONTACT A QUALIFIED SERVICER TO CORRECT THE PROBLEM IF YOU REPEATEDLY RESET THE BREAKER OR REPLACE THE FUSE WITHOUT HAVING THE PROBLEM CORRECTED YOU RUN THE RISK OF SEVERE EQUIPMENT DAMAGE hear unusual noise s coming from the unit call a qualified servicer If you Goodman Manufactu
38. on Mis match e Invalid Memory Card Data e Low Side e Low Pressure Cut Out Trip ComfortNet Thermostat Only Possible Causes Message INVALID CONFIG to integrated control module does not match hardware configuration INVALID MC DATA LOW SIDE FAULT LPS OPEN 18 e Shared data on memory card has been rejected e Low refrigerant charge e Restriction in liquid line e Indoor blower motor failure e Indoor thermostat set extremely low e Low refrigerant charge e Restriction in liquid line e Indoor blower motor failure e Indoor thermostat set extremely low Corrective Actions e Shared data sent e Verify system type communicating or legacy Verify shared data is correct for your specific model re populate data if required Wire system as legacy system Verify system type communicating or legacy Verify shared data is correct for your specific model re populate data if required Wire system as legacy system Verify refrigerant charge adjust as needed Check for restricted liquid line repair replace as needed Check indoor blower motor repair replace as needed Check indoor thermostat setting Verify refrigerant charge adjust as needed Check for restricted liquid line repair replace as needed Check indoor blower motor repair replace as needed Check low pressure switch repair replace as needed e Check ind
39. oor thermostat setting Notes amp Cautions e Turn power OFF prior to repair e Use memory card for your specific model e Insert memory card BEFORE turning power ON Memory card may be removed after data is loaded Turn power OFF before removing memory card Error code will be cleared once data is loaded Applies only to fully communicating system using ComfortNet thermostat Turn power OFF prior to repair Use memory card for your specific model Insert memory card BEFORE turning power ON Memory card may be removed after data is loaded Turn power OFF before removing memory card e Error code will be cleared once data is loaded e Turn power OFF prior to repair e Fault will clear after 30 consecutive normal cycles e Fault may be cleared by cycling 24VAC to control e Replace with correct replacement part s e Turn power OFF prior to repair e Replace with correct replacement part s TROUBLESHOOTING INFORMATION UNITARY DIAGNOSTIC CODES UNITARY DIAGNOSTIC CODES Symptoms of Diagnostic Status ComfortNet Abnormal Operation LED Display Codes Fault Thermostat Only Possible Corrective Notes amp Legacy amp ComfortNet Description fieasaqe Causes Actions Cautions Compressor and outdoor e Low Pressure LPS e Low refrigerant fe Verify refrigerant e Turn power OFF prior fan are off Cut Out LOCKOUT charge charge adjust as to repair e Low pressure switch Lockout e
40. ose pump valve and hold vacuum for 10 minutes Typically pressure will rise during this period e Ifthe pressure rises to 1000 microns or less and remains steady the system is considered leak free proceed to startup e f pressure rises above 1000 microns but holds steady below 2000 microns moisture and or noncondensibles may be present or the system may have a small leak Return to step 2 If the same result is encountered check for leaks as previously indicated and repair as necessary then repeat evacuation e If pressure rises above 2000 microns a leak is present Check for leaks as previously indicated and repair as necessary then repeat evacuation ELECTRICAL CONNECTIONS The condensing unit rating plate lists pertinent electrical data necessary for proper electrical service and overcurrent protec tion Wires should be sized to limit voltage drop to 2 max from the main breaker or fuse panel to the condensing unit Consult the NEC CEC and all local codes to determine the correct wire gauge and length Local codes often require a disconnect switch located near the unit do not install the switch on the unit Refer to the installa tion instructions supplied with the indoor furnace air handler for specific wiring connections and indoor unit configuration Like wise consult the instructions packaged with the thermostat for mounting and location information OVERCURRENT PROTECTION The following overcurrent protection dev
41. ow to set the balance point NETWORK TROUBLESHOOTING Verify that the bus TERM dipswitches are in the ON position OFF ON The ComfortNet system is a fully communicating system which operates over a communicating 1 network Occasionally the need to troubleshoot the network may arise The integrated control E TERM module has some on board tools that may be used to troubleshoot the network These tools are red 9 E TERM communications LED green receive Rx LED and learn button e Red communications LED Indicates the status of the network The table below indicates the LED status and the corresponding potential problem e Green receive LED Indicates network traffic The table below indicates the LED status and the corresponding potential problem e LEARN button Used to reset the network Depress the button for approximately 2 seconds to reset the network SYSTEM TROUBLESHOOTING NOTE Refer to the instructions accompanying the CT compatible indoor air handler furnace modular blower unit for troubleshooting information regarding indoor unit diagnostics Refer to the Troubleshooting Chart at the end of this manual for a listing of possible air conditioner and heat pump error codes possible causes and corrective actions LED LED Status Indication Possible Causes Corrective Action s Notes amp Cautions 1 Flash Communications Failure fe Communications Failure Depress Learn Button Depress once quickly for a power up reset Red
42. ped units USE THIS INFORMATION ATTEMPTING TO INSTALL OR REPAIR THIS UNIT WITHOUT SUCH BACKGROUND MAY RESULT IN PRODUCT DAMAGE Coves amp REGULATIONS PERSONAL INJURY OR DEATH This product is designed and manufactured to comply with na tional codes Installation in accordance with such codes and or prevailing local codes regulations is the responsibility of the in staller The manufacturer assumes no responsibility for equip Acaution ment installed in violation of any codes or regulations Rated SCROLL EQUIPPED UNITS SHOULD NEVER BE USED TO EVACUATE THE AIR performance is achieved after 72 hours of operation Rated per GONDMONING SYSTEM VACUUMS THIS LOW CAN CAUSE INTERNAL formance is delivered at the specified airflow See outdoor unit ELECTRICAL ARANG RESULTING IN A DAMAGED OR FAILED specification sheet for split system models or product specifi COMPRESSOR cation sheet for packaged and light commercial models Speci fication sheets can be found at www goodmanmfg com for Goodman brand products or www amana hac com for Amana brand products Within either website please select the residential or commercial products menu and then select the submenu for the type of product to be installed such as air conditioners or heat pumps to access a list of product pages that each contain links to that model s specification sheet The United States Environmental Protection Agency EPA has issued various regulations regarding the introd
43. ring Company L P 5151 San Felipe Suite 500 Houston TX 77056 www goodmanmfg com or www amana hac com 2009 2014 Goodman Manufacturing Company L P Amana is a registered trademark of Maytag Corporation or its related companies and is used under license to Goodman Company L P Houston TX All rights reserved 24
44. rmer secondary voltage rises module diagnostic status e Transformer replace if needed above 21VAC LED display shows the overloaded e Replace with correct indicated code e Low line voltage replacement part s e Compressor is off Comp Not Not e No current e Check compressor e Turn power OFF prior e Integrated control Protector displayed displayed through run or repair replace as to repair module diagnostic status Open start windings needed e Fault will clear after 1 LED display shows the e Compressor e Check wiring repair normal cycle indicated code run winding is replace as needed e Fault may be cleared open e Check run ca by cycling 24VAC to e Compressor not pacitor replace as control properly wired to needed e Replace with correct control replacement part s e Faulty compressor wiring Failed compressor run capacitor e Faulty run capacitor wiring e Air conditioner heat e No Line Voltage NO LINE e No Line Voltage Check circuit e Turn power OFF prior pump may appear to be VOLTAGE breaker and fuses to repair operating normally e Verify unit is con e Control detects line e Compressor protector nected to power voltage less than may be open compressor supply as specified 185 VAC and outdoor fan off on rating plate e Fault will clear if line e Integrated control voltage increases module diagnostic status above 185 VAC LED display shows the indicated code 22 SPLIT SYSTEMS AIR COND
45. roper size Leak TESTING NITROGEN OR NITROGEN TRACED Pressure test the system using dry nitrogen and soapy water to locate leaks If you wish to use a leak detector charge the system to 10 psi using the appropriate refrigerant then use nitrogen to finish charging the system to working pressure then apply the detector to suspect areas If leaks are found repair them After repair repeat the pressure test If no leaks exist proceed to system evacuation A warnine TO AVOID THE RISK OF ARE OR EXPLOSION NEVER USE OXYGEN HIGH PRESSURE AIR OR FLAMMABLE GASES FOR LEAK TESTING OF A REFRIGERATION SYSTEM AQ WaRNING TO AVOID POSSIBLE EXPLOSION THE LINE FROM THE NITROGEN CYLINDER MUST INCLUDE A PRESSURE REGULATOR AND A PRESSURE RELIEF VALVE THE PRESSURE RELIEF VALVE MUST BE SET TO OPEN AT NO MORE THAN 150 pai System EVACUATION Condensing unit liquid and suction valves are closed to contain the charge within the unit The unit is shipped with the valve stems closed and caps installed Do not open valves until the system is evacuated NOTE Scroll compressors should never be used to evacuate or pump down a heat pump or air conditioning system 1 Connect the vacuum pump with 250 micron capability to the service valves 2 Evacuate the system to 250 microns or less using suction and liquid service valves Using both valves is necessary as some compressors create a mechanical seal separating the sides of the system 3 Cl
46. rost cycle time is 10 minutes 90 Minutes 120 Minutes Dipswitch Settings for Selection SYSTEM START Up of Defrost Time NOTE Power must be supplied to the 18 SEER outdoor units containing ECM motors before the power is applied to the indoor unit Sending a low voltage signal without high voltage power Ay caution present at the outdoor unit can cause malfunction of the control POSSIBLE REFRIGERANT LEAK module on the ECM motor To AVOID A POSSIBLE REFRIGERANT LEAK OPEN THE SERVICE VALVES Adequate refrigerant charge for the matching evaporator coil or UNTIL THE TOP OF THE STEM IS 1 8 FROM THE RETAINER air handler and 15 feet of lineset is supplied with the condens ing unit If using evaporator coils or air handlers other than HSVTC coil it maybe necessary to add or remove refrigerant to attain proper charge If line set exceeds 15 feet in length refrigerant should be added at 6 ounces per foot of liquid line NOTE Charge should always be checked using superheat when using a piston and subcooling when using TXV equipped indoor coil to verify proper charge Open the suction service valve first If the liquid service valve is opened first oil from the compressor may be drawn into the indoor coil TXV restricting refrigerant flow and affecting operation of the system When opening valves with retainers open each valve only until the top of the stem is 1 8 from the retainer To avoid loss of refrigerant DO NOT apply pressure
47. t charge is within limits Charge the unit on low stage 1 Purge gauge lines Connect service gauge manifold to base valve service ports Run system at least 10 minutes to allow pressure to stabilize 2 Temporarily install a thermometer on the liquid line at the liquid line service valve and 4 6 from the compressor on the suction line Ensure the thermometer makes adequate contact and is insulated for best possible readings Use liquid line temperature to determine subcooling and vapor temperature to determine superheat 3 Check subcooling and superheat Systems with TXV application should have a subcooling of 5 to 7 F and superheat of 7 to 9 F a If subcooling and superheat are low adjust TXV to 7 to 9 F superheat then check subcooling NOTE To adjust superheat turn the valve stem clockwise to increase and counter clockwise to decrease If subcooling is low and superheat is high add charge to raise subcooling to 5 to 7 F then check superheat If subcooling and superheat are high adjust TXV valve to 7 to 9 F superheat then check subcooling d If subcooling is high and superheat is low adjust TXV valve to 7 to 9 F superheat and remove charge to lower the subcooling to 5 to 7 F NOTE Do NOT adjust the charge based on suction pressure unless there is a gross undercharge 4 Disconnect manifold set installation is complete SUBCOOLING FORMULA SAT LIQUID TEMP LIQUID LINE TEMP NOTE Check the Schrader ports for l
48. tdoor units via analog 24 VAC signals It is a one way communication path in that the indoor and outdoor units typically do not return information to the thermostat On the other hand the indoor unit outdoor unit and thermostat comprising a ComfortNet system communicate digitally with one another Itis now a two way communications path The thermostat still sends commands to the indoor and outdoor units However the thermostat may also request and receive information from both the indoor and outdoor units This information may be displayed on the CT thermostat The indoor and outdoor units also interact with one another The outdoor unit may send commands to or request information from the indoor unit Two way digital communications is accomplished using only two wires The thermostat and subsystem controls are powered with 24 VAC Thus amaximum of 4 wires between the equipment and thermostat is all that is required to operate the system AIRFLOW CONSIDERATION Airflow demands are managed differently in a fully communi cating system than they are in a legacy wired system The system operating mode as determined by the thermostat determines which unit calculates the system airflow demand If the indoor unit is responsible for determining the airflow de mand it calculates the demand and sends it to the ECM motor If the outdoor unit or thermostat is responsible for determining the demand it calculates the demand and transmits the de
49. tent is less than 3 minutes thermostat each demand e Compressor protector has not tripped compressor e Low pressure and high i pressure switches are closed e Integrated control module diagnostic status LED display shows the indicated code e Compressor and outdoor BLANK 4 e Locked Rotor LOCKED e Compressor fan are off ROTOR bearings are Compressor protector trips seized four consecutive times i e Average run time between compressor run trips is less than 15 capacitor seconds e Faulty run e Integrated control capacitor wiring module diagnostic status e Low line voltage LED display shows the indicated code e ComfortNet thermostat displays error message e Check thermostat e Turn power OFF prior and thermostat to repair wiring repair e Fault will clear after 4 replace as consecutive normal needed cycles Check e Fault may be cleared compressor by cycling 24VAC to relay operation control replace control as e Replace with correct needed replacement part s e Minimum compressor runt time is changed from 30 seconds to 3 minutes Check e Turn power OFF prior compressor to repair operation repair e Must clear fault by replace as cycling 24VAC to needed control Check run e Replace with correct capacitor replace replacement part s as needed Check wiring repair replace as needed Verify line voltage is within range on rating plate contact local utility is
50. to the retainer When opening valves without a retainer remove service valve cap and insert a hex wrench into the valve stem and back out the stem by turning the hex wrench counterclockwise Open the valve until it contacts the rolled lip of the valve body NOTE These are not back seating valves It is not necessary to force the stem tightly against the rolled lip After the refrigerant charge has bled into the system open the liquid service valve The service valve cap is the secondary seal for the valve and must be properly tightened to prevent leaks Make sure cap is clean and apply refrigerant oil to threads and sealing surface on inside of cap Tighten cap finger tight and then tighten additional 1 6 of a turn 1 wrench flat to properly seat the sealing surfaces Do not introduce liquid refrigerant from the cylinder into the crankcase of the compressor as this may damage the compressor 1 Break vacuum by fully opening liquid and suction base valves 2 Set thermostat to call for cooling Check indoor and outdoor fan operation and allow system to stabilize for 10 minutes for fixed orifices and 20 minutes for expansion valves CHARGE VERIFICATION AQ WarniNG By caution REFRIGERANT UNDER PRESSURE USE REFRIGERANT RTIRED TO AHRI STANDARDS USED REFRIGERANT e DO NOT OVERCHARGE SYSTEM WITH REFRIGERANT MAY CAUSE COMPRESSOR DAMAGE AND IS NOT COVERED UNDER THE DO NOT OPERATE UNIT IN A VACUUM OR AT NEGATIVE PRESSURE WARRANTY MOST
51. ture can support the weight and that proper consideration is given to the weather tight integrity of the roof Since the unit can vibrate during operation sound vibration transmission should be considered when installing the unit Vibration absorbing pads or springs can be installed between the condensing unit legs or frame and the roof mounting assembly to reduce noise vibration NOTE These units require special location consideration in areas of heavy snow accumulation and or areas with prolonged continuous subfreezing temperatures Heat pump unit bases have cutouts under the outdoor coil that permit drainage of frost accumulation Situate the unit to permit free unobstructed drainage of the defrost water and ice Aminimum 3 clearance under the outdoor coil is required in the milder climates In more severe weather locations it is recommended that the unit be elevated to allow unobstructed drainage and air flow The elevation minimums at right are recommended P B8to 4142 SAFE REFRIGERANT HANDLING While these items will not cover every conceivable situation they should serve as a useful guide A warnine TO AVOID POSSIBLE INJURY EXPLOSION OR DEATH PRACTICE SAFE HANDLING OF REFRIGERANTS A warnine TO AVOID POSSIBLE EXPLOSION USE ONLY RETURNABLE NOT DISPOSABLE SERVICE CYLINDERS WHEN REMOVING REFRIGERANT FROM A SYSTEM e ENSURE THE CYLINDER ISFREE OF DAMAGE WHICH COULD LEAD TO A LEAKOR EXPLOSION ENSURE THE HYDROSTATIC TEST
52. uction and disposal of refrigerants Failure to follow these regulations may harm the environment and can lead to the imposition of substantial fines Should you have any questions please contact the local office of the EPA If replacing a condensing unit or air handler the system must be manufacturer approved and Air Conditioning Heating and Refrigeration Institute AHRI matched NOTE Installation of unmatched systems is strongly discouraged Outdoor units are approved for operation above 55 F in cooling mode Operation below 55 F in cooling mode requires the use of an approved low ambient kit Operating the unit in a structure that is not complete either as part of new construction or renovation will void the warranty FEATURES This heat pump is a part of the ComfortNet family of products It may be installed as part of a legacy system using a standard 24 VAC thermostat However with the CTKO ComfortNet thermostat kit this heat pump may be installed as part of a digitally communicating system The ComfortNet system provides automatic airflow configuration enhanced setup features and enhanced diagnostics It also reduces the number of thermostat wires to a maximum of four and a minimum of two Amana is a registered trademark of Maytag Corporation or its related companies and is used under license to Goodman Company L P Houston TX All rights reserved INSTALLATION CLEARANCES Special consideration must be giv
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