708367-B FT4BF PSH4BF R
Contents
1. This 2 stage unit will defrostin whichever stage is called for by the thermostat If only Y 1 is energized then the unit will defrost in low stage If Y1 and Y2 are energized the unit will defrost in high stage Note All units are shipped from the factory with the default time setting of 30 minutes Maximum heating performance can be achieved by setting the time to 90 minutes Defrost Test Procedure 1 Terminals R C must have 18 30v present between them in order for time delay and defrost sequences to be initiated 2 With compressor running in heat mode first jump the T2 DFT test pins This will indicate to board that defrost T stat is closed Defrost T stat closes at 32 opens at 68 3 Next jump the Test pin to on terminal strip This will initiate defrost test in 5 10 or 15 seconds This is determined by 30 60 or 90 minutes defrost pin settings Factory setting will be 30 minutes 4 When the reversing valve shifts to the defrost mode quickly remove jumper from Test C If the jumper is not removed within a 5 second period the defrost test will terminate Unit will continue to stay in defrost mode Until A Board recognizes that defrost sensor has reached 68 and opened or B T2 DFT jumper is removed or C 10 minutes have elapsed board override Ifthe above steps will notinitiate a defrost replace the defrost board Anti Short Cycle Timer Test The 5 minute time delay feat2. 708367B Replaces 708367A ENERGY STAR Specifications and illustrations subject to change without notice and without incurring obligations Printed in U S A 08 05
3. STARTUP AND CHECKOUT N WARNING Ensure electrical power to the unit is off prior to performing the following steps Failure to do so may cause personal injury or death Air Filters Ensure air filters are clean and in place prior to operating the equipment Thermostat Setthe room thermostat function switch to OFF fan switch to AUTO and adjust the temperature setpoint to its highest setting Prior to applying electrical power to the outdoor unit ensure that the unit has been properly and securely grounded and that power supply connections have been made at both the facility power interface and outdoor unit Thermostat RW2C E O Y1Y2 W1W3 OW DD DO ODD OO NOTE Jumper W1 and W2 together R m W2 C O Y1 Y2 Yellow l v2 Black Air Handler Heat Pump OD Section Typical 2 Stage Cooling Heat Pump with Optional Indoor Thermostat and Variable Speed Air Handler Outdoor Unit Ensure the outdoor coil and top of the unit are free from obstructions and debris and all equipment access control panels are in place Using extreme caution apply power to the unit and inspect the wiring for evidence of open shorted and or improperly wired circuits Functional Checkout CAUTION These units have a crankcase heater factory installed Wait 24 hours prior to performing a function checkout to allow for heating of the compressor
4. from a liquid to a cold gas 3 Refrigerant compressed to a hot gas by 3 Refrigerant drawn to heat pump and heat pump carries the heatto the hot heat compressed to a hot gas by heat pump transfer section indoor coil carries the heat outdoors 4 Hot heat transfer section indoor coil 4 Hot heat transfer section outdoor coil releases the heatto indoor air as refrigerant releasesthe heatas refrigerant condenses condenses from a gas to a liquid from a gas to a liquid 5 Airhandler circulates the heat throughout 5 Heat pump outdoor fan discharges the the home heat to outside air 6 Refrigerant returns to outdoor coil and 6 Refrigerant returns to indoor coil and evaporates once again to absorb more evaporates once again to absorb more heat heat OPERATING INSTRUCTIONS TO OPERATE YOUR HEAT PUMP FOR COOLING 1 Set the thermostat system switch to COOL and the thermostat fan switch to AUTO See Figure 1 Set the thermostat temperature to the desired temperature level using the tem perature selector Please refer to the sepa rate detailed thermostat user s manual for complete instructions regarding thermostat programming The outdoor unit and indoor blower will both cycle on and off to maintain the indoor temperature at the desired cool ing level NOTE If the thermostat temperature level is re adjusted or the thermostat system Switch is repositioned the outdoor unit may not start immediately The ou
5. Opencircuit in compressor start wiring or connections e Check wiring and connectors between supply and the compressor S terminal Compressor start winding is damaged Yellow ALERT Flash Code 7 Open Run Circuit Current only in start circuit e Check compressor motor winding resistance Open circuit in compressor run wiring or connections Check wiring and connectors between supply and the compressor R terminal Compressor run winding is damaged Yellow ALERT Flash Code 8 Yellow ALERT Flash Code 9 Welded Contactor Compressor always runs Low Voltage Control circuit lt 17VAC Flash Code number corresponds to a number of LED flashes TRIP and ALERT LEDs flashing at same time means control circuit voltage is too low for operation e Check compressor motor winding resistance Compressor contactor has failed closed Thermostat demand signal not connected to module Control circuit transformer is overloaded Lowline voltage contact utility if voltage at disconnect is low Check wiring connections followed by a pause and then repeated Table 1 Interpreting the Diagnostic LEDS Cont Cooling Gradually lower the thermostat temperature setpoint below the actual room temperature and observe that the outdoor unit and indoor blower energize Feel the air being circulated by the indoor blower and verify that it is cooler than ambient temperature Listen for any unusual noises If pre
6. Outdoor Heat Pump User s Information lInstallation Instructions Two Stage R 410A Split System These units have been designed and tested for capacity and efficiency in accordance with Standards Split System Heat Pump units are designed for use with a wide variety of fossil fuel furnaces electric furnaces air handlers and evaporator coil combinations These instructions are primarily intended to assist qualified individuals experienced in the proper installation of heating and or air conditioning appliances Some local codes require licensed installation service personnel for this type of equipment Read all instructions carefully before starting the installation USER S INFORMATION IMPORTANT Read this owner information to become familiar with the capabilities and use of your appliance Keep this with literature on other appliances where you have easy access to it in the future If a problem occurs check the instructions and follow recommendations given If these suggestions don t eliminate your problem call your servicing contractor Heat Pump Principle of Operation WINTER HEATING SUMMER COOLING 1 Outdoor air enters heat pump 1 Indoor air enters the air handler section Cold heat transfer section outdoor coil 2 Cold heat transfer section indoor coil extracts heat from outdoor air as refrigerant extracts heat from indoor air as refrigerant evaporates from a liquid to a gas evaporates
7. R 410A HP unit in cooling mode with TXV 14 475 450 V H 20 D emove refrigerent when ab 425 400 375 350 325 Liquid Pressure psig 300 275 Add efrigerent when below curve 250 Ft I tt t 44 70 75 80 85 90 95 100 105 110 115 120 125 Liquid Temperature F move refrigerent when above curve A O Liquid Pressure psig a DD 350 325 300 Add refrigerent when below curve 275 250 Efn S S S A S S S B S SS S S B S 9H 9 S A S SA E 9 HP T 70 75 80 85 90 95 100 105 110 115 120 125 Liquid Temperature F Figure 5 Charging Chart for 4 ton R 410A HP unit in cooling mode with TXV 15 500 Remove refrigerent when above curve 475 A AR n2 C1 AB Liquid Pressure psig N H HHHHHHHH HHHHHHHUHHIHT HHHHTHHHIHHHCHHHHHH 350 325 300 275 Add refrigerent when below curve 250 He HHH 70 75 80 85 90 95 100 105 110 115 120 125 Liquid Temperature F Figure 6 Charging Chart for 5 ton R 410A HP unit in cooling mode with TXV INSTALLER PLEASE LEAVE THESE INSTALLATION INSTRUCTIONS WITH THE HOMEOWNER 708367B
8. all electrical power to the unit is off prior to installing or servicing the equipment Failure to do so may cause personal injury or death SITE PREPARATION Unpacking Equipment Remove the cardboard carton and User s Manual from the equipment Take care to not damage tubing connections when removing from the carton Inspect for Damage Inspect the equipment for damage prior to installing the equipment at the job site Ensure coil fins are straight and if necessary comb fins to remove flattened and bent fins Preferred Location of the Outdoor Unit at the Job Site Conduct a survey of the job site to determine the optimum location for mounting the outdoor unit Overhead obstructions poorly ventilated areas and areas subject to accumulation of debris should be avoided The outdoor unit should be installed no closer than 18 inches from the outside walls of the facility and in an area free from overhead obstructions to ensure unrestricted airflow through the outdoor unit Facility Prerequisites Electrical power supplied must be adequate for proper operation of the equipment The system must be wired and provided with circuit protection in accordance with local building codes and the National Electrical Code INSTALLING THE OUTDOOR UNIT Slab Mount The site selected for a slab mount installation requires a stable foundation and one not subject to erosion The slab should be level and anchored if necessar
9. and connectors e Check indoor blower control board e Check thermostat wiring for open circuit Evaporator coil is frozen e Check for low suction pressure e Check for excessively low thermostat setting e Check evaporator airflow coil blockages or return airfilter Check ductwork or registers for blockage Faulty metering device Check TXV bulb installation size location and contact e Check if TXV fixed orifice is stuck closed or defective Condenser coil is dirty Liquid line restriction filter drier blocked if present in system Thermostat is malfunctioning e Solenoid plug not connected e Y2not wired at Comfort Alert Thermostat is malfunctioning e Check thermostat sub base or wiring for short circuit e Check thermostat installation location level Comfort Alert failure Yellow ALERT System Pressure Trip High head pressure Flash Code 2 Discharge or suction e Check high pressure switch if present in system pressure out of limits or Check if system is overcharged with refrigerant compressor overloaded e Check for non condensable in system Condenser coil poor air circulation dirty blocked damaged Condenser fan is not running e Check fan capacitor e Check fan wiring and connectors e Check fan motor for failure or blockage Return air duct has substantial leakage If low pressure switch present in system check Flash Code 1 information Yellow ALERT Short Cycling 1 Thermostat demand signal is intermitten
10. ce of the heat pump will result in an increase in electric utility costs Defrost During cold weather heating operation the outdoor unit will develop a coating TEMPERATURE LU PR SYSTEM SWITCH Figure 1 Typical Thermostat of snow and ice on the heat transfer coil This is normal and the unit will periodically defrostitself At the beginning of the defrost cycle both the outdoor condenser fan and compressor will de energize After approximately 30 seconds the compressor will energize and begin to heat the outdoor coil causing the ice and snow to melt After the ice and snow have melted some steam may rise from the outdoor unit as the warm coil causes some melted frost to evaporate Once the defrost cycle is completed the outdoor fan motor will start and the compressor will de energize again for approximately 30 seconds Then the compressor will energize and continue normal operation TO OPERATE YOUR HEAT PUMP FOR AUTOMATIC COOLING AND HEATING 1 Set the thermostat system switch to AUTO andthe thermostat fan switch to AUTO See Figure 1 Note Thermostats will vary Some models will not include the AUTO mode and others willhave the AUTO in place of the HEAT and COOL and some will include all three 2 Set the thermostat temperature to the desired heating and cooling temperature level s The outdoor unit and the indoor blower will then cycle on and off in either the heating or cooling mode of ope
11. crankcase Failure to comply may result in damage and could cause premature failure of the system Indoor Blower Turn the fan switch to ON Verify that the indoor blower is operating and that airflow is not restricted Set the fan switch back to AUTO Blower will operate ata decreased speed on continuous fan 2 Speed Outdoor Fan Motor Select Models If unit utilizes a 2 speed condenser fan motor this motor will operate on low speed when in low cooling and on high speed when in high cooling A relay within the control area switches the fan motor from low to high speed using the call for high cooling as the trigger Low Pressure Switch A low pressure switch is factory installed and located in the suction line internal to the outdoor unit The switch is designed to protect the compressor from a loss of charge Under normal conditions the switch is closed If the suction pressure falls below 5 psig then the switch will open and de energize the outdoor unit The switch will close again once the suction pressure increases above 20 psig Please note that the switch interrupts the thermostat inputs to the unit Thus when the switch opens and then closes there will be a 5 minute short cycling delay before the outdoor unit will energize Discharge Temperature Limit A discharge temperature limit is factory installed and located on the compressor discharge line internal to the outdoor unit within 5 inches of the com
12. ds in the tubing Refrigeranttubing should be supported in amannerthatthe tubing will not vibrate or abrade during system operation Tubing should be kept clean of foreign debris during installation Every effort should be made by the installer to ensure that the field installed refrigerant containing components of the system have been installed in accordance with these instructions and sound installation practices so as to insure reliable System operation and longevity The maximum recommended interconnecting refrigerant line length is 75 feet and the vertical elevation difference between the indoor and outdoor sections should not exceed 20 feet Consult long line application guide for installations in excess of these limits Filter Dryer Installation A filter dryer is provided with the unit and must be installedin the liquid line ofthe system Ifthe installation replaces a system with a filter dryer already present in the liquid line the filter dryer must be replaced with the one supplied with the unit The filter dryer must be installed in strict accordance with the manufacturer s installation instructions Optional Equipment Optional equipment e g low ambient control etc should be installed in strict accordance with the manufacturer s installation instructions ELECTRICAL CONNECTIONS N WARNING Turn off all electrical power at the main circuit box before wiring electrical power to the outdoor unit Failure t
13. ermittent module powers up only when compressor runs TRIP LED is on but system and compressor check OK Determine if R and Y terminals are wired in reverse Verify module s R and C terminals have a constant source Review 24VAC Power W iring page 4 for R and C wiring Verify Y terminal is connected to 24VAC at contactor coil Verify voltage at contactor coil falls below 0 5VAC when off Verify 24 VAC is present across Y and C when thermostat demand signal is present If not R and C are reverse wired TRIP LED and ALERT LED flashing together ALERT Flash Code 3 Compressor Short Cycling displayed incorrectly off ALERT Flash Code 5 6 or 7 Open Circuit Open Start Circuit or Open Run Circuit displayed incorrectly ALERT Flash Code 6 Open ALERT Flash Code 8 Welded Contactor displayed incorrectly Verify R and C terminals are supplied with 19 28VAC Verify Y terminal is connected to 24VAC at contactor coil Verify voltage at contactor coil falls below 0 5VAC when Check that compressor run and start wires are through module s current sensing holes Verify Y terminal is connected to 24VAC at contactor coil Verify voltage at contactor coil falls below 0 5VAC when off Check that compressor run and start wires are routed Start Circuit displayed for Code 7 through the correct module sensing holes Open Run Circuit or vice versa Determine if module s Y terminal is connected Verify Y terminal is connected
14. f consecutive flashes defined as the Flash Code correlates to a particular abnormal condition Detailed descriptions of specific ALERT Flash Codes are shown in Table 1 of this manual TRIP LED Red indicates there is a demand signal from the thermostat but no current to the compressor is detected by the module The TRIP LED typically indicates the compressor protector is open or may indicate missing supply power to the compressor The scrollcompressor s common C and start S wires are routed through the holes in the Comfort Alert module marked R and S The common C need not be routed through the module for it to operate properly 24 VAC Power Wiring The Comfort Alert module requires a constant nominal 24 VAC power supply The wiring to the module s R and C terminals must be directly from the indoor unit orthermostat The module cannot be powered by the C terminal on a defrost board or other control board without experiencing nuisance alerts When constant 24 R wire is not present in the outdoor unit use one of the spare wires in the thermostat cable to bring power to the module Connect the other end of the spare wire to R at the indoor unit or thermostat Thermostat Demand Wiring The Comfort Alert module requires a thermostat demand signal to operate properly The thermostat demand signal input labeled Y on the module should always be connected to the compressor co
15. led refrigerant grade copper tubing should be used when installing the system Refrigerant suction line tubing should be fully insulated Field Connections for Electrical Power Supply All wiring must comply with current provisions of the National Electrical Code ANSI NFPA 70 and with applicable local codes having jurisdiction The minimum size of electrical conductors and circuit protection must be in compliance with information listed on the outdoor unit data label SAFETY CONSIDERATIONS Pressures within the System Split system heat pump equipment contains liquid 4 and gaseous refrigerant under pressure Installation and servicing of this equipment should be accomplished by qualified trained personnel thoroughly familiar with this type of equipment Under no circumstances should the Homeowner attempt to install and or service the equipment Labels Tags Precautions When working with this equipment follow all precautions in the literature on tags and on labels provided with the equipment Read and thoroughly understand the instructions provided with the equipment prior to performing the installation and operational checkout of the equipment Brazing Operations Installation of equipment may require brazing operations Safety codes must be complied with Safety equipment e g safety glasses work gloves fire extinguisher etc must be used when performing brazing operations N WARNING Ensure
16. ntactor coil so that when the coil is energized the demand signal input is 24 VAC when the coil is notenergized the demand signal input should be less than 0 5 VAC NOTE Factory installed modules have differ ent thermostat demand signal wiring Follow manufacturer s wiring instructions when replac ing module NOTE After the thermostat demand signal is connected verify that 24 VAC across Y and C when demand is present Figure 2 Comfort Alert Diagnostics Module Status LED Status LED Description Status LED Troubleshooting Information Green POWER Module has power Supply voltage is present at module terminals Red TRIP Thermostat demand signal Compressor protector is open Y is present but the e Check for high head pressure compressor is not e Check compressor supply voltage running Outdoor unit power disconnect is open Compressor circuit breaker or fuse s is open Broken wire or connector is not making contact Low pressure switch open if present in system Compressor contactor has failed open Yellow ALERT Long Run Time Low refrigerant charge Flash Code 1 Compressor is Evaporator bloweris not running running extremely e Check blower relay coil and contacts long run cycles Check blower motor capacitor e Check blower motor for failure or blockage Check evaporator blower wiring
17. o comply may cause severe personnel injury or death Wiring Diagram Schematic A wiring diagram schematic is located on theinside cover of the electrical box of the outdoor unit The installer should become familiar with the wiring diagram schematic before making any electrical connections to the outdoor unit Outdoor Unit Connections The outdoor unit requires both power and control circuit electrical connections Refer to the unit wiring diagram schematic for identification and location of outdoor unit field wiring interfaces Control Circuit Wiring The outdoor unit is designed to operate from a 24 VAC Class Il control circuit Control circuit wiring must comply with the current provisions of the National Electrical Code ANSI NFPA 70 and with applicable local codes having jurisdiction Thermostat connections should be made in accordance with the instructions supplied with the thermostat and with the instructions supplied with the indoor equipment A typical residential installation with a heat pump thermostat and air handler are shown below Electrical Power Wiring Electrical power wiring must comply with the current provisions of the National Electrical Code ANSI NFPA 70 and with applicable local codes having jurisdiction Use of rain tight conduit is recommended Electrical conductors shall have minimum circuit ampacity in compliance with the outdoor unit rating label The facility shall em
18. or blower de energize Immediately lower the setpoint temperature of the thermostat to its original setting and verify that the indoor blower is energized and that the outdoor unit remains de energized Verify that after approximately 5 minutes the outdoor unit energizes and that the temperature of the air supplied to the facility is cooler than ambient temperature Comfort Alert Diagnostics The Comfort Alert diagnostics module is a breakthrough innovation for troubleshooting heat pump and air conditioning system failures The module installs easily in the electrical box of the outdoor unit near the compressor contactor By monitoring and analyzing data from the Copeland scroll compressor and the thermostat demand the module can accurately detect the cause of electrical and system related failures without any sensors A flashing LED indicator communicates the ALERT code and guides the service technician more quickly and accurately to the root cause of a problem NOTE This module does not provide safety protection The Comfort Alert module is a monitoring device and cannot control or shut down other devices LED Description See Figure 1 POWERLED Green indicates voltage is present at the power connection of the module ALERT LED Yellow communicates an abnormal system condition through a unique flash code The ALERT LED will flash a number of times consecutively pause and then repeat the process The number o
19. orthe temperature measured determine the required liquid refrigerant pressure from the appropriate charging chart below 4 If the pressure measured in step 1 is greater than the required liquid refrigerant pressure determined in step 4 then there is too much charge in the system Remove refrigerant and repeat steps 1 through 3 until the system is correctly charged 13 5 Ifthe pressure measured in step 1 is less System Charge thanthe required liquid refrigerant pressure T R 410A determined in step 4 then there is too little 22 charge the system Add refrigerant and 208 repeat steps 1 through 3 until the system is correctly charged 272 272 Procedure for charging an R 410A ston unit in heating mode 5 Ton 212 Table 3 Split System Heat Pump Charge 1 Evacuate the refrigerant system 2 Weigh in the proper charge per Table 3 of these installation instructions 3 Ensure that the unit is operating properly per the heating functional checkout in these installation instructions emove refrigerent when abov Co N A HH HHH HH HH 2 Co C1 Liquid Pressure psig Co 275 Add refrigerent when below curve 250 HHHH PH EE HH EHH HHH HH 70 75 80 85 90 95 100 105 110 115 120 125 Liquid Temperature F Figure 3 Charging Chart for 2 ton
20. ploy electrical circuit protection at a current rating no COPPER WIRE SIZE AWG 1 Suy Wieleng ekeet Drop Supply Wire Length Feet Wire Length Feet Supply Circuit Ampacity ELE S 2 1 2 tee Wire Size based on N E C for 60 type copper conductors greater than that indicated on the outdoor unit rating label Refer to the unit wiring diagram for connection details Minimum Circuit Ampacity Electrical wiring to the equipment must be compatible and in compliance with the minimum circuit ampacity listed on the outdoor unit data label Maximum Fuse Circuit Breaker Size Circuit protection for the outdoor unit must be compatible with the maximum fuse circuit breaker size listed on the outdoor unit data label Disconnect Switch An electrically compatible disconnect switch must be within line of sight of the outdoor unit This switch shall be capable of electrically de energizing the outdoor unit Optional Equipment Optional equipment requiring connection to the power or control circuits must be wired in strict accordance with current provisions of the National Electrical Code ANSI NFPA 70 with applicable local codes having jurisdiction and the installation instructions provided with the equipment Optional Equipment e g low ambient control hard start kits etc should be installed in strict accordance with the manufacturer s installation instructions
21. pressor discharge The limit is designed to protect the compressor from abnormal temperatures that may occur if there is a loss of charge Under normal conditions the switch is closed If the discharge temperature rises above 270 F then the switch will open and de energize the outdoor unit The switch will close again once the temperature decreases below 190 F Please note that the switch interrupts the thermostat inputs to the unit Thus when the switch opens and then closes there will be a5 minute short cycling delay before the outdoor unit will energize High Pressure Switch A high pressure switch is factory installed and located in the compressor discharge line internal to the outdoor unit The switch is designed to de energize the system when very high pressures occur during abnormal conditions Under normal conditions the switch is closed If the discharge pressure rises above 575 psig then the switch will open and de energize the outdoor unit The switch will close again once the discharge pressure decreases to 460 psig Please note that the switch interrupts the thermostat inputs to the unit Thus when the switch opens and then closes there will be a5 minute short cycling delay before the outdoor unit will energize Short Cycle Protection With the system operating in COOLING mode note the setpoint temperature setting of the thermostat and gradually raise the setpoint temperature until the outdoor unit and indo
22. ration as required to automatically maintain the indoor temperature within the desired limits TO SHUT OFF YOUR HEAT PUMP Set the thermostat system switch to OFF and the thermostat fan switch to AUTO See Figure 1 The system will not operate regardless of the thermostat temperature selector s setting TO OPERATE THE INDOOR BLOWER CONTINUOUSLY Set the thermostat fan switch to ON See Figure 1 The indoor blower will start and will run continually until the fan switch is reset to AUTO The continuous indoor blower operation can be obtained with the thermostat system switch set in any position including OFF The continuous indoor blower operation is typically used to circulate the indoor air to equalize a temperature unbalance due to a sun load cooking or fireplace operation TO MAINTAIN YOUR HEAT PUMP N CAUTION Be certain the electrical power to the outdoor unit and the furnace air handler is disconnected before doing the following recommended maintenance Regularly a Clean or replace the indoor air filter at the start of each heating and cooling season and when an accumulation of dust and dirt is visible on the air filter Inspect the filter monthly b Remove any leaves and grass clippings from the coil in the outdoor unit being careful not to damage the aluminum fins c Check for any obstruction such as twigs sticks etc N CAUTION Do not over oil or oil moto
23. rs not factory equipped with oil tubes The compressor is hermetically sealed and does not require lubrication 2 Before Calling a Service Technician Be Certain a The unit thermostat is properly set see To Operate Your Heat Pump for Cooling and To Operate Your Heat Pump for Heating b The unit disconnect fuses are in good condition and the electrical power to the unit is turned on Read Your Warranty Please read the separate warranty document completely It contains valuable information about your system GENERAL INFORMATION N CAUTION This unit uses R 410A DO NOT under any circumstance use any other refrigerant besides R 410A inthis unit Use of another refrigerant will damage this unit Readthe following instructions completely before performing the installation Outdoor Unit Section Each outdoor unit is shipped with a refrigerant charge adequate to operate the outdoor section with an indoor matching coil or air handler These units include the proper amount of refrigerant for an additional 15 ft of refrigerant lines the same size as the valve fittings NOTE DO NOT USE ANY PORTION OF THE CHARGE FOR PURGING OR LEAK TESTING Matching coils and air handlers may be shipped with a small holding charge to pressurize them to keep out contaminants To release the pressure read the indoor section installation instructions carefully Liquid and Suction Lines Fully annea
24. sent locate and determine the source of the noise and correct as necessary Heating If provided with heating equipment lowerthe thermostat setpoint temperature to the lowest obtainable setting and set the thermostat function switch to HEATING The outdoor unit should stop running The indoor blower will go off after the preprogrammed delay Increase the setpoint temperature of the thermostat to the maximum setting Verify that the heating equipment has been energized i e fossil fuel burner operating etc and that the indoor blower energizes after a short period of time Feel the air being circulated by the indoor blower and verify that it is warmerthan ambient temperature Listen for any unusual noises If present locate and determine the source of the noise and cor rect as necessary NOTE Other sources for heating i e electric furnace fossil fuel furnace air handler with electric heat options etc that interface with the heat pump should be functionally checked to verify system operation and compatibility with the heat pump Refer to the installation instruc tions for this equipment and perform a functional 11 Miswired Module Indication Recommended Troubleshooting Action Green LED is not on module does not power up Determine if both R and C module terminals are connected Verify voltage is present at module s R and C terminals Review 24VAC Power W iring page 4 for R and C wiring Green LED int
25. t Flash Code 3 Compressor is running 2 Time delay relay or control board defective only briefly 3 If high pressure switch present go to Flash Code 2 information 4 If low pressure switch present go to Flash Code 1 information Yellow ALERT Locked Rotor 1 Run capacitor has failed Flash Code 4 2 Low line voltage contact utility if voltage at disconnect is low e Check wiring connections 3 Excessive liquid refrigerant in compressor 4 Compressor bearings are seized Measure compressor oil level Table 1 Interpreting the Diagnostic LEDS 10 Status LED Status LED Description Status LED Troubleshooting Information 1 2 Yellow ALERT Flash Code 5 Open Circuit Outdoor unit power disconnect is open Compressor circuit breaker or fuse s is open 3 Compressor contactor has failed open e Check compressor contactor wiring and connectors e Check for compressor contactor failure burned pitted or open Check wiring and connectors between supply and compressor e Check for low pilot voltage at compressor contactor coil High pressure switch is open and requires manual reset Open circuit in compressor supply wiring or connections Unusually long compressor protector reset time due to extreme ambient temperature Compressor windings are damaged Yellow ALERT Flash Code 6 Open Start Circuit Current only in run circuit e Check compressor motor winding resistance Runcapacitor has failed
26. tdoor unit contains a protective timer circuit which holds the unit off for approximately five minutes following a previous operation or the interruption of the main electrical power TO OPERATE YOUR HEAT PUMP FOR HEATING 1 Set the thermostat system switch to HEAT and the thermostat fan switch to AUTO See Figure 1 THERMOMETER FAN SWITCH 2 Set the thermostat temperature to the desired temperature level using the temperature selector Please refer to the separate detailed thermostat user s manual for complete instructions regarding thermostat programming The outdoor unit and indoor blower will both cycle on and off to maintain the indoor temperature at the desired heating level NOTE If the thermostat temperature level is re adjusted or the thermostat system switch is repositioned the outdoor unit may not start immediately The outdoor unit contains a protective timer circuit which holds the unit off for approximately five minutes following a previous operation or the interruption of the main electrical power Emergency Heat The thermostat includes a system switch position termed EM HT This is a back up heating mode to be used only if there is a suspected problem with the outdoor unit With the system switch set to EM HT the outdoor unit will be locked off and supplemental heat typically electric resistance heating will be usedas a source of heat Sustaineduse of electric resistance heat in pla
27. to 24VAC at contactor coil Verify 24VAC is present across Y and C when thermostat demand signal is present If not R and C are reverse wired V erify voltage at contactor coil falls below 0 5VAC when off Review Thermostat Demand Wiring page 4 for Y and C wiring Table 2 Module Wiring Troubleshooting checkout in accordance with the manufacturer s instructions Optional Equipment A functional checkout should be performed in accordance with the checkout procedures supplied with the equip ment Defrost Cycle Timer The defrost cycle timer controls the time interval of the hot gas defrost after the defrost sensor closes It is located in the lower left corner of the defrost control board Three interval settings are available 30 minutes 60 minutes and 90 minutes Time setting selection is dependent on the climate where the unit is being installed 12 Example 1 Dry climate of Southern Arizona A 90 minute setting is recommended Example 2 Moist climate of Seattle Washington A 30 minute setting is recommended To set the cycle timer place the timing pin on the defrost control board to the desired time interval post Please note that when the defrost cycle initiates via the sensor there will be a 30 second compressor delay going into and out of the defrost cycle Please note that when initializing defrost through the test function this delay is cancelled and the compressor will not de energize
28. ure can be bypassed or shortened to 1 second by jumping the Test to C terminal Note If jumper is left on the Test to common pins permanently the defrost cycle will become inoperable Adjustment of Refrigerant Charge N CAUTION Split system heat pump equipment contains liquid and gaseous refrigerant under pressure Adjustment of refrigerant charge should only be attempted by qualified trained personnel thoroughly familiar with the equipment Under no circumstances should the homeowner attempt to install and or service this equipment Failure to comply with this warning could result in equipment damage personal injury or death NOTE The unit must be charged while both first and second stages are operating NOTE To achieve rated capacity and efficiency the compressor must be exposed to refrigerant for at least 24 hours prior to running and then must be run for a minimum of 12 hours NOTE The following Refrigerant Charging Charts are applicable to listed assemblies of equipment and at listed airflows for the indoor coil Assemblies of indoor coils and outdoor units not listed are not recommended Procedure for charging an R 410A unitin AC mode at outdoor tempera tures above 65F 1 With the system operating at steady state measure the liquid refrigerant pressure in psig at the service valve 2 Measure the liquid refrigerant temperature in Fahrenheit at the service valve 3 F
29. y prior to placing the equipment on the slab Cantilever Mount The cantilever mount should be designed with adequate safety factor to support the weight of the equipment and for loads subjected to the mount during operation Installed equipment should be adequately secured to the cantilever mount and levelled prior to operation of the equipment Roof Mount The method of mounting should be designed so as notto overload roof structures nor transmit noise to the interior of the structure Refrigerant and electrical line should be routed through suitably waterproofed openings to prevent water leaking into the structure INSTALLING THE INDOOR UNIT The indoor section should be installed before proceeding with routing of refrigerant piping Consultthe Installation Instructions ofthe indoor unit i e air handler furnace etc for details regarding installation CONNECTING REFRIGERANT TUBING BETWEEN THE INDOOR AND OUTDOOR UNIT N CAUTION This system utilizes R 410A refrigerant with POE oil When servicing cover or seal openings to minimize the exposure of the refrigerant system to air to prevent accumulation of moisture and other contaminants General Once outdoor and indoor unit placementhas been determined route refrigerant tubing betweenthe equipmentin accordance with sound installation practices Refrigerant tubing should be routed in a manner that minimizes the length of tubing and the number of ben
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