Amana AVZC18 Manual

Inverter heat pump condenser units with r-410a refrigerant blowers, coils, & accessories

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Service instructions manual (88 pages)

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Service and Troubleshooting

AVZC18 Inverter Heat Pump Condenser Units with R-410A Refrigerant

Pride and workmanship go into every product to provide

our customers with quality products. It is possible, however,

that during its lifetime a product may require service.

Products should be serviced only by a qualified service

technician who is familiar with the safety procedures

required in the repair and who is equipped with the proper

tools, parts, testing instruments and the appropriate service

manual. REVIEW ALL SERVICE INFORMATION IN THE

APPROPRIATE SERVICE MANUAL BEFORE

BEGINNING REPAIRS.

Only personnel that have been trained to install, adjust,

service or repair(hereinafter, "service") the equipment

specified in this manual should service the equipment. The

manufacturer will not be responsible for any injury or

property damage arising from improper service or service

procedures. If you service this unit, you assume responsi-

bility for any injury or property damage which may re-

sult. In addition, in jurisdictions that require one or more

licenses to service the equipment specified in this manual,

only licensed personnel should servise the equipment.

Improper installation, adjustment, servicing or repair of

the equipment specified in this manual, or attempting to

install, adjust, service or repair the equipment specified in

this manual without proper training may result in product

damage, property damage, personal injury or death.

PROP 65 WARNING

FOR CALIFORNIA CONSUMERS

Cancer and Reproductive Harm -

www.P65Warnings.ca.gov

Blowers, Coils, & Accessories

WARNING

2015-2017, 2019, 2021 Goodman Manufacturing Company, L.P.

is a registered trademark of Maytag Corporation or its related companies and is used under license.

For service information related to the Bluetooth® Shared

Data Loader BTSDL01 referenced in this manual, please

refer to the installation instructions for the BTSDL01 at

www.coolcloudhvac.com/loaderuserguide

IMPORTANT INFORMATION ............................................. 2

PRODUCT IDENTIFICATION ............................................ 4

SYSTEM OPERATION ....................................................... 5

SERVICING ........................................................................ 9

CHECKING VOLTAGE ................................................. 9

CHECKING WIRING ..................................................... 9

CHECKNG THERMOSTAT, WIRING ........................... 9

THERMOSTAT AND WIRING ....................................... 9

CHECKING TRANSFORMER AND CONTROL

CIRCUIT ......................................................................... 9

CHECKING HIGH PRESSURE SWITCH .................. 10

CHECKING INDOOR AND OUTDOOR HI/LOW

PRESSURE SENSOR................................................. 10

CHECKING COMPRESSOR ...................................... 10

COMPRESSOR WINDING INSULATION TEST ....... 11

GROUND TEST ........................................................... 11

TESTING TEMPERATURE SENSORS AND EEV

COIL RESISTANCE..................................................... 12

TESTING EEV COIL RESISTANCE .......................... 12

TESTING REVERSING VALVE .................................. 12

AVPEC* HEATER CONTROL ..................................... 13

REFRIGERATION REPAIR PRACTICE .................... 14

LEAK TESTING (NITROGEN OR NITRO-

GEN-TRACED) ............................................................ 14

STANDING PRESSURE TEST (RECOMMENDED) . 14

EVACUATION .............................................................. 15

CHARGING .................................................................. 16

FINAL CHARGE ADJUSTMENT ................................ 16

0140M00517-A

CHECKING COMPRESSOR EFFICIENCY .............. 16

CHECKING SUBCOOLING ........................................ 16

NON-CONDENSABLES .............................................. 17

COMPRESSOR BURNOUT ....................................... 17

RS6215001r5

January 2021

Table of Contents

Troubleshooting

Summary of Contents for Amana AVZC18

Page 1: Table Of Contents
Service and Troubleshooting AVZC18 Inverter Heat Pump Condenser Units with R-410A Refrigerant Blowers, Coils, & Accessories Pride and workmanship go into every product to provide For service information related to the Bluetooth® Shared our customers with quality products. It is possible, however, Data Loader BTSDL01 referenced in this manual, please that during its lifetime a product may require service.
Page 2: Important Information
IMPORTANT INFORMATION REFRIGERANT PIPING ..........18 DUCT STATIC PRESSURES AND/OR STATIC PRES- SURE DROP ACROSS COILS ........22 AIR HANDLER EXTERNAL STATIC ......22 COIL STATIC PRESSURE DROP ......22 INDOOR UNIT TROUBLESHOOTING ...... 23 SAFE REFRIGERANT HANDLING DIAGNOSTIC CODES ..........25 While these items will not cover every conceivable situa- SETTING THE MODE DISPLAY ........
Page 3 IMPORTANT INFORMATION Notice: WARNING When the outdoor unit is connected to main power, the inverter board has a small current flowing into it to be pre- O AVOID POSSIBLE EXPLOSION pared for operation when needed. Due to this, the Control •U SE ONLY RETURNABLE NOT DISPOSABLE...
Page 4: Product Identification
PRODUCT IDENTIFICATION NOMENCLATURES Nomenclature Brand Engineering A - Amana® Brand Minor Revision Compressor Engineering V - Variable Capacity Major Revision Voltage Type 1 - 208/230 V single phase 60 Hz X - AC R-410A 2 -208/240 V single phase 50 Hz...
Page 5: System Operation
Once the vapor is fully liquefied, it continues AVZC18 models are available in 2 through 5 ton sizes and to give up heat which subcools the liquid, and it is ready to use R-410A refrigerant. They are designed for 208/230 volt repeat the cycle.
Page 6 SYSTEM OPERATION SYSTEM STARTUP TEST NOTE: BOOST MODE performance is most effective when A system verification test is now required to check the paired with an electronic expansion valve enabled indoor equipment settings and functionality. unit. BOOST MODE is ON by default and is activated when the 18 SEER Inverter units are tested by any of the following outdoor temperature reaches 105°F.
Page 7 SYSTEM OPERATION 1. On the CTK04 HOME screen, select MENU. 2. From the MENU screen, scroll down and select In- staller Options. 3. Enter installer password if known. a. The password is the thermostat date code and can be obtained by selecting the red Cancel but- ton and selecting the Dealer Information button.
Page 8 SYSTEM OPERATION COOLING CYCLE Stop HP/LP HP/LP Valve (Gas) Reversing Valve ID HP/LP OD HP/LP Sensor Sensor Check Valve Thermistor Thermistor Access Tube Thermistor Thermistor Motor Motor Thermistor Comp Thermistor SubACC Thermistor Check Valve Thermistor Filter Stop Valve Filter Filter Filter Dryer (Liquid) Filter...
Page 9: Servicing
SERVICING CHECKING VOLTAGE THERMOSTAT AND WIRING 1. Remove outer case, control panel cover, etc., from unit being tested. WARNING With power ON: OLTAGE NOW PRESENT WARNING With power ON, thermostat calling for cooling/heating. 1. Use a voltmeter to check for 24 volt at thermostat wires OLTAGE NOW PRESENT C and R in the indoor unit control panel.
Page 10: Checking High Pressure Switch
SERVICING 2. Using a voltmeter, check voltage across secondary volt- 1. Connect manifold gauge to the air conditioner unit age side of transformer (R to C). 2. Connect a pair of extended Molex probe tips to your 3. No voltage indicates faulty transformer, bad wiring, or voltmeter test leads.
Page 11: Compressor Winding Insulation Test
SERVICING Ignition of the discharge can also occur at the venting NOTE: The 2, 3, and 4 ton compressor has a terminal on terminal or inside the compressor, if there is sufficient the top. The 5 ton compressor has the terminals on the contaminant air present in the system and an electrical arc side.
Page 12: Testing Temperature Sensors And Eev Coil Resistance
SERVICING WARNING Damage can occur to the glass embedded terminals if the leads are not properly removed. This can result in terminal and hot oil discharging. WARNING Disconnect ALL power before servicing. TESTING TEMPERATURE SENSORS AND EEV COIL TESTING REVERSING VALVE RESISTANCE CHECKING REVERSING VALVE AND SOLENOID The AVZC ComfortNet ready heat pump models and...
Page 13: Avpec* Heater Control
SERVICING tion from COOLING to HEATING cycle. If the valve fails to 1. Turn on power to air handler or modular. change its position, test the voltage (24V) at the valve coil WARNING terminals (X25A) on outdoor unit PCB while the system is Line Voltage now present.
Page 14: Refrigeration Repair Practice
SERVICING BRAZING MATERIALS Voltages between the two data lines and between each data line and common may be used to determine if the IMPORTANT NOTE: Torch heat required to braze tubes of network is operating properly. various sizes is proportional to the size of the tube. Tubes of smaller size require less heat to bring the tube to braz- Do the following to measure the voltages on the communi- ing temperature before adding brazing alloy.
Page 15: Evacuation
SERVICING SYSTEM PRESSURE TESTING Break the vacuum with dry nitrogen again, bring the system pressure back up to 2-3 PSIG, and hold for 20 Once all of the refrigerant line connections are completed. minutes. Perform a 3-step nitrogen pressure test. 3.
Page 16: Charging
SERVICING 2000 microns, moisture and non-condensables are still FINAL CHARGE ADJUSTMENT present. If gauge continues to rise a leak is present. Repair and re-evacuate. The outdoor temperature must be 65°F to 105°F. If out- 7. Close valve to micron gauge and vacuum pump. Shut door ambient temperature is out of range, charge defined off pump and prepare to charge.
Page 17: Non-Condensables
SERVICING Compressor speed is displayed under STATUS menu in the 2. Install a high side pressure gauge on the high side (liq- thermostat. uid) service valve at the front of the unit. 3. Record the gauge pressure and the temperature of the 1.
Page 18: Refrigerant Piping
SERVICING Now determine if a burn out has actually occurred. Confirm by analyzing an oil sample using a Sporlan Acid Test Kit, AK-3 or its equivalent. Remove the compressor and obtain an oil sample from the suction stub. If the oil is not acidic, either a burnout has not occurred or the burnout is so mild that a complete clean-up is not necessary.
Page 19 SERVICING Hanger Wall Liquid Line Stud Strapped to Suction Line Liquid Line Metal Sleeve Suction Line Wrapped in Armaflex ® FIGURE 1-1. INSTALLATION OF REFRIGERATION PIPING FROM VERTICAL TO HORIZONTAL IMPORTANT - Refrigerant lines must not touch wall. Suction Line Liquid Line Outside Wall Wood Block...
Page 20 SERVICING If hanging line set from a joist or rafter, use metal strapping Wire Tie or heavy nylon wire tires (around suction line only) that are securely anchored. 8’ Floor Joist or T ape or Wire Tie Roof Rafter 8’ Floor Joist or Roof Rafter Metal Sleeve Strapping placed...
Page 21 SERVICING Oil Trap Construction LONG RADIUS STREET ELL 45° 45° STREET SHORT RADIUS STREET ELL SECTION 4. OUTDOOR UNIT IS BELOW THE INDOOR UNIT 1. The maximum elevation (vertical) difference between the outdoor unit and the indoor unit is 90 feet. 2.
Page 22: Duct Static Pressures And/Or Static Pres- Sure Drop Across Coils
SERVICING DUCT STATIC PRESSURES AND/OR STATIC PRES- COIL STATIC PRESSURE DROP SURE DROP ACROSS COILS 1. Using a draft gauge (inclined manometer), connect the This minimum and maximum allowable duct static pres- positive probe underneath the coil and the negative sure for the indoor sections are found in the specifications probe above the coil.
Page 23: Indoor Unit Troubleshooting
SERVICING INDOOR UNIT TROUBLESHOOTING WARNING HIGH VOLTAGE ! ISCONNECT POWER BEFORE SERVICING ULTIPLE POWER SOURCES MAY BE PRESENT AILURE TO DO SO MAY CAUSE PROPERTY DAMAGE PERSONAL INJURY OR DEATH A UXA LA R M ACC-OUT (Accessory) ACC-IN (Accessory) RX LED X13A FUSE X12A...
Page 24 SERVICING TROUBLESHOOTING 7 Segment ELECTROSTATIC DISCHARGE (ESD) PRECATIONS Diagnostic Fault Displays NOTE: Discharge body’s static electricity before touching Recall unit. An electrstaic can adversly affect electrical compo- nents. Use the following precautions during air handler installation and servicing to protect the integrated control module from damage.
Page 25: Diagnostic Codes
SERVICING DIAGNOSTIC CODES 7 SEGMENT LED DESCRIPTION OF CONDITION ERROR MESSAGE DISPLAY Normal Operation NO HTR KIT INSTALLED - SYSTEM CALLING FOR AUXILIARY HEAT (Minor Error Code) (No Display) HEATER KIT DIP SWITCHES NOT SET PROPERLY Check Heater Kit Dip Switches FUSE OPEN BLOWN FUSE AUXILIARY SWITCH OPEN...
Page 26 SERVICING 2-digit 7 segment displays 7 Segment LED Description of Condition Display (State) (No Di s pl a y) INTERNAL CONTROL FAULT/NO POWER STANDBY, WAITING FOR INPUTS FAN COOL-COMMUNICATING MODE ONLY (Aux Hea t Dema nd) FAN HEAT-COMMUNICATING MODE ONLY (Aux Hea t Dema nd) digit 7 segment displays on indoor control board FAN ONLY (Fa n Dema nd-Ma nua l )
Page 27 SERVICING 2-digit 7 segment displays 3. When the unit is havingsome minor error code in normalmode,2-digit 7 segmentdisplaysshow error code and airﬂowstatus. 2. Error code 3. Airﬂow 4. When the unit is havingsome minor error code during defrost opera�onin normalmode, 2-digit 7 segmentdisplaysshow state “dF”, error code and airﬂowstatus.
Page 28: Setting The Mode Display
SERVICING SETTING THE MODE DISPLAY MODE DISPLAY INTRODUCTION A 2-digit display is provided on the printed circuit board (PCB) as a backup tool to the thermostat for accessing error codes and erasing error code history of the indoor unit. Follow the information provided in this section to learn how to use the mode display.
Page 29 SERVICING SETTING THE MODE DISPLAY...
Page 30: Indoor Unit Error Codes
SERVICING INDOOR UNIT ERROR CODES...
Page 31 SERVICING INDOOR UNIT ERROR CODES...
Page 32 SERVICING ADVANCED USER MENU DIAGNOSTICS INDICATION/USER SUBMENU ITEM COMMENTS MODIFIABLE OPTIONS Clear Faults NO or YES Selecting "YES" clears the fault history. Fault 1 Most recent HP fault Fault 2 2nd most recent HP fault Fault 3 3rd most recent HP fault Fault 4 4th most recent HP fault Fault 5...
Page 33 SERVICING ADVANCED USER MENU SYSTEM SETUP (SYS SETUP) SUBMENU ITEM USER MODIFIABLE OPTIONS COMMENTS Reset System Setup Options to Factory NO or YES Selecting "YES" resets this menu to factory default Defaults (SYS SETUP RESET) settings. SET MAX CURRENT Future use. If the outdoor &...
Page 34 SERVICING ADVANCED USER MENU COOL SETUP SUBMENU ITEM USER MODIFIABLE OPTIONS COMMENTS CL Reset YES or NO Selecting to default factory setting. Cool Airflow Trim Hi (C TR H) -15% to +15% in 3% increments Selects the cooling airflow trim amount. Cool Airflow Trim Int (C TR I) -15% to +15% in 3% increments Selects the cooling airflow trim amount.
Page 35 SERVICING EMERGENCY MODE FOR EEV APPLICABLE INDOOR 1. HEATING EMERGENCY MODE UNIT Emergency Heating mode is to be used when commu- nication between the indoor unit and thermostat is not functioning properly. This mode will run the electric heat strips independently of any thermostat in one of two modes: High Heat Level or Low Heat Level.
Page 36 SERVICING Upon start up in emergency mode the circuit board may display an “Ed” error. This is an indication that the DIP switches on the control board need to be configured in accordance with the Electric Heating Airflow Table. Configuring the DIP switches to the unit will clear the error code.
Page 37 SERVICING 2. COOLING EMERGENCY MODE Avg. Cooling emergency mode is to be used when communica- ON time OFF time Run Time tion between the indoor and outdoor units is not functioning properly and temporary cooling operation is required. This Low Cool 7 minutes 15 minutes mode enables the outdoor unit and indoor unit to run inde-...
Page 38 SERVICING Dipswitch Default Factory Se�ngs Switch # Se�ng Func�on No Use No Use ID DS-1 No Use No Use No Use No Use ID DS-2 No Use No Use Heater Kit Selec�on in Emergency Mode Heater Kit Selec�on in Emergency Mode ID DS-3 Heater Kit Selec�on in Emergency Mode Heater Kit Selec�on in Emergency Mode...
Page 39 SERVICING COOLING EMERGENCY MODE WIRING FOR TXV AP- PLICABLE INDOOR UNIT Cooling emergency mode is available when using a TXV applicable indoor unit. To energize the blower at the appro- priate speed, standard Legacy wiring is required. The im- age below shows how the thermostat input terminals are to be wired when selecting a cooling airflow.
Page 40 SERVICING SETTING THE MODE DISPLAY MODE DISPLAY INTRODUCTION A 3-digit display is provided on the Control board as a backup tool to the thermostat for reading faults, fault history, monitoring and setting up the unit. Follow the information provided in this section to learn how to use the mode display. DISPLAY The display consists of 3 digits.
Page 41 SERVICING SETTING THE MODE DISPLAY NAVIGATING THROUGH THE DISPLAY SCREENS SCREEN The home or default screen on the display. This shows the most recent fault. SCREEN 1 To access, hold the RECALL button for 5 seconds at screen 0. SCREEN 2 To access, hold the RECALL button for 5 seconds at screen 1.
Page 42 SERVICING SETTING THE MODE DISPLAY FAULT CODE HISTORY NAVIGATION < SCREEN 1> This mode will allow the user to see the six most recent system faults. For a list of the fault codes, please see the TROUBLESHOOTING tables in this document. <...
Page 43 SERVICING SETTING THE MODE DISPLAY MONITORING MODE NAVIGATION < SCREEN 0 > < SCR EEN 2 > This screen allows the user to monitor system variables as shown in the tables at the end of this section. Blink interval: < SCREEN 1 >...
Page 44 SERVICING SETTING THE MODE DISPLAY SETTINGS MODE 1 NAVIGATION < SCREEN 3 > < SCREEN 0 > Setting Mode 1 allows the user to adjust system settings as shown in the tables at the end of this section. Blink interval: <...
Page 45 SERVICING SETTING THE MODE DISPLAY SETTINGS MODE 2 < SCREEN 4 > < SCREEN 0 > Setting Mode 2 allows the user to change system settings. See table in back of this section. Blink interval: 0.4 sec. On - 0.4 sec. Off <...
Page 46 SERVICING 7-SEGMENT DISPLAY SCREEN 0 (Display FAULT CODE) Setting Contents Notes Fault code (present) SCREEN 1 (Display FAULT CODES) Setting Contents Notes Fault code (latest) Latest Fault code (2nd) Fault code (3rd) Fault code (4th) Fault code (5th) Fault code (6th) SCREEN 2 (MONITOR MODE) Setting Contents...
Page 47 SERVICING 7-SEGMENT DISPLAY SCREEN 3 (SETTING MODE 1) Setting Contents Setting Notes 0:-15% 6:3% 1:-12% 7:6% 2:-9% 8:9% Cool Airflow Trim High 3:-6% 9:12% 4:-3% 10:15% 5:0% 0:-15% 6:3% 1:-12% 7:6% 2:-9% 8:9% Cool Airflow Trim Int 3:-6% 9:12% 4:-3% 10:15% 5:0% 0:-15%...
Page 48 SERVICING 7-SEGMENT DISPLAY CTK04 ADDENDUM SCREEN 4 (SETTING MODE 2) Setting Contents Setting Notes 0: 30min. 1: 60min. Maximum Defrost Interval 2: 90min. 3: 120min. Set Maximum Current Future Use 0:Same Level Vertical Rise 1:Outdoor Lower 2:Indoor Lower System Verification Test 0:ON 1:OFF Force Defrost Cycle...
Page 49: Ctk04 Addendum
SERVICING CTK04 ADDENDUM CTK04** COMFORTNET™ THERMOSTAT TWO-WIRE OUTDOOR, FOUR-WIRE INDOOR WIRING OVERVIEW Low voltage wiring consists of two wires between the indoor The ComfortNet™ system (or CT system) is a system that unit and outdoor unit and four wires between the indoor unit includes a ComfortNet compatible modular blower heat and the thermostat.
Page 50 SERVICING CTK04 ADDENDUM THERMOSTAT MENU SCREEN SYSTEM START-UP TEST NOTICE N INITIAL POWER START THE OUTDOOR UNIT WILL DISPLAY CODE E11, SYSTEM SIGNALING THAT INITIAL TEST MUST BE RUN OLLOW ™ OMFORT SETUP SCREEN TO ENTER APPLICATION UNIQUE INFORMATION OMFORT ET THERMOSTAT MANUAL FOR DETAILED INFORMATION A system test is now required to check the equipment...
Page 51 SERVICING CTK04 ADDENDUM 4. From the MENU screen, scroll down and select Comfort- Net™ USER MENU. 5. Enter Installer password. (The password is the Date Code located on the thermostat and is available by entering the EQUIPMENT STATUS menu and scrolling to the bottom.) 6.
Page 52 SERVICING CTK04 ADDENDUM 8. Next, scroll down and select EQUIP TEST. 9. Select SYSTEM TEST. 10.Select ON to run the SYSTEM TEST. Press DONE to initiate test. 11.Allow the system test to run for its duration (5-15 minutes). EQUIP TEST SCREEN will show the system test is ON once selected.
Page 53 SERVICING CTK04 ADDENDUM 12.Press Previous Menu button and navigate to HOME screen and allow test to finish. The display similar to the one at the right will be displayed after SYSTEM TEST completes. Test is complete only when CODE 11 notice clears from BOTH the thermostat display AND the seven segment LED display on the outdoor unit.
Page 54 SERVICING CTK04 ADDENDUM 3. Enter Installer password. (The password is the Date Code located on the thermostat and is available by entering the EQUIPMENT STATUS menu and scrolling to the bottom). 4. Select YES to continue. 5. Select HEAT PUMP. 6.
Page 55 SERVICING CTK04 ADDENDUM 7. Select CHARGE Mode. 8. Select ON. Press DONE to initiate CHARGE Mode. (System will then run for 1 hour and either return to cool- ing or heating mode depending on if the mode thermo- stat is set at COOL or HEAT MODE from the SYSTEM menu on the main screen.
Page 56 SERVICING CTK04 ADDENDUM SET THERMOSTAT TO ADJUST MAXIMUM COMPRESSOR SPEED Please follow the following sequence to enter MAXIMUM compressor speed. Maximum compressor speed at which the outdoor unit will operate in cooling or heating mode can be changed using thermostat. Maximum compressor speed can be changed to get the required capacity or efficiency.
Page 57 SERVICING CTK04 ADDENDUM 4. Select YES to continue. Menu > ComfortNet User Menu Changing these se�ngs could cause improper opera�on of your HVAC equipment! Would you like to con�nue? 5. Select HEAT PUMP. Menu > ComfortNet User Menu Previous Air Handler Menu Help Heat Pump...
Page 58 SERVICING CTK04 ADDENDUM 8. Select Cool RPS SELECT(cooling mode) or HEAT RPS SELECT (heating mode). Select the desired Maximum compressor speed 9. Once Maximum compressor speed is set, navigate to SYSTEM MENU HOME HOME screen. Enter normal operation with temperature offset or thermostat schedule, as desired.
Page 59 SERVICING CTK04 ADDENDUM 3. Enter Installer password. (The password is the Date Code located on the thermostat and is available by entering the EQUIPMENT STATUS menu and scrolling to the bottom). 4. Select YES to continue. 5. Select HEAT PUMP. 6.
Page 60 SERVICING CTK04 ADDENDUM 7. User can change the airflow trim at high, intermediate and low compressor for cooling and heating mode. Select: Cool Airflow Trim Hi: high speed cooling Cool Airflow Trim Int: intermediate speed cooling Cool Airflow Trim Low: low speed cooling Heat Airflow Trim Hi: high speed heating Heat Airflow Trim Int: intermediate speed heating Heat Airflow Trim Low: low speed heating...
Page 61 SERVICING CTK04 ADDENDUM SET THERMOSTAT TO ADJUST INDOOR AIRFLOW PROFILE, COOL/HEAT ON DELAY AND COOL/HEAT OFF DELAY DEFROST 1. Please follow the sequence 1. to .6 of Set Thermostat To Adjust Indoor Air CFM trim 2. Select Cool Set-up for Cool Airflow Profile, Cool ON Delay or Cool OFF Delay Heat Set-up for Heat ON Delay or Heat OFF Delay Heat Airflow Profile, DEFROST...
Page 62 SERVICING CTK04 ADDENDUM SET THERMOSTAT TO FORCE DEFROST CYCLE Follow the following sequence to Force a defrost cycle. NOTE: Unit will need to wait another 6 minutes before starting another force defrost cycle. 1. On the HOME screen, select MENU. 2.
Page 63 SERVICING CTK04 ADDENDUM 5. Select HEAT PUMP. 6. Select EQUIP TEST. 7. Select FORCE DF CYCLE. 8. Select ON. Press DONE to initiate FORCE DEFROST CYCLE.
Page 64 SERVICING CTK04 ADDENDUM SET THERMOSTAT TO PUMP DOWN Please follow the following sequence to enter PUMP DOWN to accumulate the refrigerant to outdoor unit. Do not operate Cool ON or Heat ON mode to enter PUMP DOWN. Before starting the PUMP DOWN operation, change indoor fan trim, delay and profile back to default and stop electric heater and gas furnace.
Page 65 SERVICING CTK04 ADDENDUM 4. Select YES to continue. 5. Select HEAT PUMP . 6. Select MAINTENANCE. 7. Select PUMP DOWN.
Page 66 SERVICING CTK04 ADDENDUM 8. Select ON. Press DONE to initiate PUMP DOWN. Approximately one minute later, the compressor should start operating. Check the amperage at the compressor wiring to see the compressor operation status. Close liquid service valve approximately two minutes after compressor has come on.
Page 67 SERVICING CTK04 ADDENDUM SET 7-SEGMENT MODE DISPLAY TO PUMP DOWN PUMP DOWN operation is designed for line set less than 80 feet in length. Do not start PUMP DOWN operation if line set length is 80 feet or more. Piping may burst as a result. Please follow the following sequence to enter PUMP DOWN to accumulate the refrigerant to outdoor unit.
Page 68 SERVICING CTK04 ADDENDUM 3. Follow screen for System Status. Time Stamp (Compressor run time) HEAT PUMP Current system operational Mode (cooling, cooling startup, heating, heating startup, oil return, defrost, stop) Compressor Reduction Mode Requested and Actual percentage Demand (Requested Demand, Actual cooling/heating provided) Requested and Reported ID airflow (Requested CFM, Actual CFM) ATOF...
Page 69: Troubleshooting
TROUBLESHOOTING HEATING ANALYSIS CHART POSSIBLE CAUSE X IN ANALYSIS GUIDE INDICATE "POSSIBLE CAUSE" Liquid stop valve does not fully open Gas stop valve does not fully open Line set restriction Line set length is too long Blocked filter-dryer OD EEV coil failure OD EEV failure ID EEV coil failure ID EEV failure...
Page 70 TROUBLESHOOTING COOLING ANALYSIS CHART POSSIBLE CAUSE X IN ANALYSIS GUIDE INDICATE "POSSIBLE CAUSE" Liquid stop valve does not fully open Gas stop valve does not fully open Line set restriction Line set length is too long Blocked filter-dryer OD EEV coil failure OD EEV failure ID EEV coil failure ID EEV failure...
Page 71 TROUBLESHOOTING OUTDOOR UNIT- ERROR CODES ClimateTalk PCB LED Transmitted ClimateTalk Thermostat Fault Probable Causes Corrective Actions Fault Code Display Message ● Discharge thermistor inoperable or This error indicates the equipment is improperly connected ● Check discharge thermistor resistance and experiencing frequent high discharge ●...
Page 72 TROUBLESHOOTING OUTDOOR UNIT- ERROR CODES ClimateTalk PCB LED Transmitted ClimateTalk Thermostat Fault Probable Causes Corrective Actions Fault Code Display Message ● Check installation clearances. ● Short circuit condition ● Check the opening of stop valve, should be full open; ● Stop valve not completely open Repair/replace if needed HIGH CURRENT Board detected a high current condition.
Page 73 TROUBLESHOOTING OUTDOOR UNIT- ERROR CODES ClimateTalk PCB LED Transmitted ClimateTalk Thermostat Fault Probable Causes Corrective Actions Fault Code Display Message This error indicates the equipment is experiencing frequent low discharge ● Check the connection to thermistors; Repair/replace if ● Thermistors inoperable or improperly superheat faults.
Page 74 TROUBLESHOOTING OUTDOOR UNIT NETWORK TROUBLESHOOTING Communications is achieved by taking the difference The ComfortNet™ system is a fully communicating system, between a positive dc signal and a negative dc signal. constituting a network. Occasionally the need to trou- The positive dc signal is termed “data 1” or “1’. Data 1 is bleshoot the network may arise.
Page 75 TROUBLESHOOTING THERMISTOR RESISTANCE VALUE Tm : Coil TI : Liquid Tb : Defrost Tl : Liquid Td : Discharge Ta : Ambient Tgi: Indoor Gas Tli: Indoor Liquid Thermistor Thermistor Thermistor Thermistor TEMP TEMP Volts Volts Volts Volts Resistance Resistance Resistance Resistance ℃...
Page 76 TROUBLESHOOTING PRESSURE TEMPERATURE R-410A Pressure vs. Temperature Chart PSIG °F PSIG °F PSIG °F PSIG °F PSIG °F PSIG °F -37.7 37.8 74.3 100.2 420.0 120.7 137.6 -34.7 38.7 74.9 100.7 422.0 121.0 137.9 -32.0 39.5 75.5 101.1 424.0 121.4 138.3 -29.4 40.5...
Page 77 TROUBLESHOOTING Required Liquid Line Temperature LIQUID PRESSURE REQUIRED SUBCOOLING TEMPERATURE (°F) AT SERVICE VALVE (PSIG)
Page 78 TROUBLESHOOTING INSTALL THE ELECTRICAL BOARD WARNING When working on a service port, ensure that no refrigerant HIGH VOLTAGE ! and/or compressor oil is sprayed onto the electrical board. ISCONNECT POWER BEFORE SERVICING OR This could damage the board’s functionality. INSTALLING ULTIPLE POWER SOURCES MAY BE PRESENT AILURE TO DO SO MAY CAUSE PROPERTY...
Page 79 TROUBLESHOOTING WARNING VOID CONTACT WITH THE CHARGED AREA •N EVER TOUCH THE CHARGED AREA BEFORE CONFIRMING THAT THE RESIDUAL VOLTAGE IS VOLTS OR LESS 1. S HUT DOWN THE POWER AND LEAVE THE CONTROL BOX FOR MINUTES 2. M AKE SURE TO TOUCH THE ARTH GROUND TERMINAL TO RELEASE THE STATIC ELECTRICITY FROM YOUR BODY TO PREVENT FAILURE OF THE...
Page 80 TROUBLESHOOTING WARNING VOID CONTACT WITH THE CHARGED AREA •N EVER TOUCH THE CHARGED AREA BEFORE CONFIRMING THAT THE RESIDUAL VOLTAGE IS VOLTS OR LESS 1. S HUT DOWN THE POWER AND LEAVE THE CONTROL BOX FOR MINUTES 2. M AKE SURE TO TOUCH THE ARTH GROUND TERMINAL TO RELEASE THE STATIC ELECTRICITY FROM YOUR BODY TO PREVENT FAILURE OF THE...
Page 81: Wiring Diagrams
WIRING DIAGRAM AVZC180241**, AVZC180361**, AVZC180481**, AVZC180601** COIL CIRCUIT DEFROST LIQUID LINE DISCHARGE LINE Wiring is subject to change. Always refer to wiring diagram on the unit for the most up to date wiring.
Page 82 WIRING DIAGRAM 24V THERMOSTAT CONNECTIONS RAM MONITOR FLASH WRITER SHARE DATA Wiring is subject to change. Always refer to wiring diagram on the unit for the most up to date wiring.
Page 83: Accessories
ACCESSORIES AV**PEC HEATER KIT MODELS AVPEC25B14A* AVPEC37C14A* AVPEC59D14A* AVPEC61D14A* *Revision level taht may or may not be designated. NOTE: Airflow selection should meet the minimum requirements as mentioned in the air handler Installation instructions. For heater kit installation, it is important to set the capacity of the electric heater at Set-up menu on the thermostat and DIP switch on indoor unit control board.
Page 84: Checking Heater Limit Control(S) (Optional
ACCESSORIES static pressure external to the unit. The installation manual CHECKING HEATER LIMIT CONTROL(S) (OPTIONAL supplied with the blower coil, or the blower performance ELECTRIC HEATERS) table in the service manual, shows the CFM for the static measured. Each individual heater element is protected with an auto- matic rest limit control connected in series with each ele- Alternately, the system CFM can be determined by operat- ment to prevent overheating of components in case of low...
Page 85: Checking Heater Fuse Link (Optional Elec- Tric Heaters)
ACCESSORIES HEAT KIT NOMINAL kW NOTE: The link is designed to open at approximately 333°F. DO NOT WIRE AROUND - determine reason for 19/20 failure. 1000 1200 1400 1600 1800 2000 208/1/60 SUPPLY VOLTAGE - TEMP. RISE °F HEATER (kW) Model AVPEC25B14* AVPEC37C14*...
Page 86 Please fill out the feedback form on one of the following links: Goodman Brand Products: (http://www.goodmanmfg.com/about/contact-us). ® Amana Brand Products: (http://www.amana-hac.com/about-us/contact-us). ® You can also scan the QR code on the right for the product brand you purchased to be directed to the feedback page. GOODMAN BRAND ®...

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