Amana AVXC20 Series Service Instructions Manual
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Amana AVXC20 Series Service Instructions Manual

Inverter condensing unit
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Service Instructions
®
for
Brand
AVXC20 Inverter Condensing Units
with R-410A Refrigerant
Blowers, Coils, & Accessories
This manual is to be used by qualified, professionally trained HVAC technicians only.
The manufacturer does not assume any responsibility for property damage or personal injury
RS6115001
due to improper service procedures or services performed by an unqualified person.
June 2015
© 2015 Goodman Manufacturing Company, L.P.
i
s a registered trademark of Maytag Corporation or its related companies and is used under license. All rights reserved.

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  • Page 1 Service Instructions ® Brand AVXC20 Inverter Condensing Units with R-410A Refrigerant Blowers, Coils, & Accessories This manual is to be used by qualified, professionally trained HVAC technicians only. The manufacturer does not assume any responsibility for property damage or personal injury RS6115001 due to improper service procedures or services performed by an unqualified person.

  • Page 2: Table Of Contents

    WIRING DIAGRAM ............78 - 81 product. For further assistance, please contact: CONSUMER INFORMATION LINE - IMPORTANT NOTICES FOR CONSUMERS AMANA® BRAND PRODUCTS TOLL FREE AND SERVICERS 1-877-254-4729 (U.S. only) email us at: customerservice@goodmanmfg.com RECOGNIZE SAFETY SYMBOLS, WORDS AND LABELS fax us at: (713) 856-1821 (Not a technical assistance line for dealers.)

  • Page 3: Important Information

    IMPORTANT INFORMATION SAFE REFRIGERANT HANDLING WARNING While these items will not cover every conceivable situation, they should serve as a useful guide. O AVOID POSSIBLE INJURY EXPLOSION OR DEATH PRACTICE SAFE HANDLING OF REFRIGERANTS WARNING “ ” EFRIGERANTS ARE HEAVIER THAN AIR HEY CAN PUSH OUT CAUTION...

  • Page 4: Product Identification

    PRODUCT IDENTIFICATION NOMENCLATURES Brand Engineering A - Amana® 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 Z - HP R-410A...

  • Page 5: Accessories

    ACCESSORIES EXPANSION VALVES R410A - Max. 75°C (167°F) SS = 2°C (3.6°F) or according to customer specifi cation Number of turns Number of turns Number of turns Number of turns from SS to from SS to from SS to from SS to TIGHT Spring LOOSE Spring tight spring...
  • Page 6 ACCESSORIES AVXC20***1** Model Name TXV-Kit AVXC200241** TXV-V24 AVXC200361** TXV-V36 AVXC200481** TXV-V48 AVXC200601** TXV-V60 AVPVC**14 ELECTRIC HEAT AIRFL OW TABLE H tr kW AVPVC24C14* AVPVC36D 14A+ AVPVC48D 14*++ AVPVC60D 14++ 850** 1250 1250 1250 OF F 1300 1300 1300 OF F 1500 1500 1500...

  • Page 7: Capacitor

    CAPACITOR 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 8 CAPACITOR 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 9 CAPACITOR 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 10: Replacing The Board

    REPLACING THE BOARD Install the electrical board WARNING When working on a service port, ensure that no refrigerant and/or HIGH VOLTAGE ! compressor oil is sprayed onto the electrical board. This could ISCONNECT POWER BEFORE SERVICING OR damage the board’s functionality. INSTALLING ULTIPLE POWER SOURCES MAY BE 1.

  • Page 11: System Operation

    SYSTEM OPERATION This section gives a basic description of cooling unit operation, The indoor evaporator coil functions to cool and dehumidify the its various components and their basic operation. Ensure your air conditioned spaces through the evaporative process taking system is properly sized for heat gain and loss according to place within the coil tubes.
  • Page 12 SYSTEM OPERATION COOLING CYCLE Piping Diagram (2-4 Ton) Motor Capillary Tube Stop Valve Filter (Liquid) Drier Tl Thermistor Ref cooling Indoor unit Outdoor unit Piping Diagram (5 Ton) Motor Capillary Tube Accumulator Stop Valve Filter (Liquid) Drier Tl Thermistor Indoor unit Outdoor unit LEGEND: Tl = Thermistor (Outdoor Liquid Temperature)

  • Page 13: Cooling Analysis Chart

    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 EEV coil failure EEV failure High Pressure switch failure Pressure sensor failure...
  • Page 14 SERVICING TABLE OF CONTENTS TABLE OF CONTENTS S-50 CHECKING HEATER LIMIT CONTROL(S) ...... 38 CHECKING VOLTAGE ..........15 S-52 CHECKING HEATER ELEMENTS ........38 CHECKING WIRING ........... 15 CHECKING THERMOSTAT AND WIRING ..... 15 S-60 ELECTRIC HEATER (OPTIONAL ITEM) ......38 S-3A THERMOSTAT AND WIRING ........

  • Page 15: Checking Voltage

    SERVICING S-1 CHECKING VOLTAGE S-3 CHECKING THERMOSTAT AND WIRING THERMOSTAT WIRE SIZING CHART 1. Remove outer case, control panel cover, etc., from unit being MIN. COPPER WIRE tested. LENGTH OF RUN GAUGE (AWG) With power ON: 25 feet 50 feet 75 feet WARNING 100 feet...

  • Page 16: S-3E Ctk0*** Comfortnet

    SERVICING S-3E CTK0*** COMFORTNET THERMOSTAT Typical 18 AWG thermostat wire may be used to wire the system components. However, communications reliability may be im- VERVIEW proved by using a high quality, shielded, twisted pair cable for the data transmission lines. In either case, 250 feet is the maxi- The ComfortNet™...

  • Page 17: System Start - Up Test

    SERVICING YSTEM TART 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 settings and functionality.
  • Page 18 SERVICING 4. From the MENU screen, scroll down and select COMFORTNET™ 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 19 SERVICING 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 20: Set Thermostat To Charge Mode

    SERVICING 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 21 SERVICING 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 AIR CONDITIONER. 6. Select MAINTENANCE.
  • Page 22 SERVICING 7. Select CHARGE MODE. 8. Select ON. Press DONE to initiate CHARGE MODE. (System will then run for 1 hour and either return to cooling mode if the thermostat is set for COOL mode, or stop if the thermostat is set for FAN or HEAT mode.) If charging is not complete after 1 hour, repeat 7.

  • Page 23: Set Thermostat To Adjust Maximum Compressor Speed

    SERVICING HERMOSTAT TO DJUST AXIMUM OMPRESSOR PEED Please follow the following sequence to enter MAXIMUM compressor speed. Maximum compressor speed at which the outdoor unit will operate can be changed using thermostat. Maximum compressor speed can be changed to get the required capacity or efficiency. Once the maximum speed is set, the system operates between the set maximum speed and default low speed.
  • Page 24 SERVICING 4. Select YES to continue. 5. Select AIR CONDITIONER. 6. Select CL RUN VALUES. 7. Select COOL RPS RANGE. Press COOL RPS RANGE to select the range in which the desired Maximum compressor speed falls.

  • Page 25: Set Thermostat To Adjust Indoor Air Cfm Trim

    SERVICING 8. Select COOL RPS SELECT. Select the desired Maximum compressor speed 9. Once Maximum compressor speed is set, navigate to HOME screen. Enter normal operation with temperature offset or thermostat schedule, as desired. HERMOSTAT TO DJUST NDOOR TRIM 1. On the HOME screen, select MENU 2.
  • Page 26 SERVICING 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 AIR CONDITIONER. 6. Select COOL SET-UP.
  • Page 27 SERVICING 7. User can change the airflor trim at high, intermediate and low compressor speeds. Select: C TR H: high speed cooling C TR I: intermediate speed cooling C TR L: low speed cooling Under each criteria, a selection between +15% to -15% in the increment of 3% can be made.

  • Page 28: Set Thermostat To Adjust Indoor Airflow Profile, Cool On Delay And Cool Off Delay

    SERVICING INDOOR AIRFLOW HERMOSTAT TO DJUST PROFILE, COOL ON DELAY COOL OFF DELAY 1. Please follow the sequence 1. to .6 of S HERMOSTAT DJUST CFM TRIM. NDOOR 2. Select COOL AIRFLOW PROFILE, COOL ON DELAY or COOL OFF DELAY. Check the installation manual of the indoor unit for more details.

  • Page 29: Set Thermostat To Equip Test

    SERVICING PUMP DOWN HERMOSTAT TO Please follow the following sequence to enter PUMP DOWN to accumulate the refrigerant to outdoor unit. Do not operate Cool ON mode to enter PUMP DOWN. Be- fore starting the PUMP DOWN operation, change indoor fan trim, delay and profile back to default and stop electric heater and gas furnace.
  • Page 30 SERVICING 4. Select YES to continue. 5. Select AIR CONDITIONER. 6. Select MAINTENANCE. 7. Select PUMP DOWN.

  • Page 31: Set Thermostat To Pump Down

    SERVICING 8. Select ON. Press DONE to initiate PUMP DOWN. At this point, 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. Compressor will stop automatically then close the gas service valve immediately.
  • Page 32 SERVICING PUMP DOWN EGMENT ISPLAY TO Please follow the following sequence to enter PUMP DOWN to 2. At this point, the compressor should start operating. Check accumulate the refrigerant to outdoor unit. the amperage at the compressor wiring to see the compressor operation status.

  • Page 33: Servicing

    SERVICING With power ON: S-4 CHECKING TRANSFORMER AND CONTROL CIRCUIT WARNING WARNING HIGH VOLTAGE ! OLTAGE NOW PRESENT ISCONNECT POWER BEFORE SERVICING OR 3. Start the system in charge mode and place a piece of card- INSTALLING ULTIPLE POWER SOURCES MAY BE board in front of the condenser coil, raising the condensing PRESENT AILURE TO DO SO MAY CAUSE PROPERTY...

  • Page 34: S-15A Resistance Check

    SERVICING S-15A RESISTANCE CHECK WARNING VOLTMETER HIGH VOLTAGE ! ISCONNECT POWER BEFORE SERVICING OR INSTALLING ULTIPLE POWER SOURCES MAY BE 15 AMP FUSE PRESENT AILURE TO DO SO MAY CAUSE PROPERTY DAMAGE PERSONAL INJURY OR DEATH AMMETER 1. Discharge capacitor and remove wire leads. WARNING CAPACITOR 30 OHM...

  • Page 35: Set Thermostat To Check System Status

    SERVICING S-17 CHECKING COMPRESSOR 3.0 Continuous Fan Operation 2.1 With a demand for continuous fan operation, the CTK04 WARNING thermostat sends a fan request to the integrated air handler control along with a fan demand. The control energizes Hermetic compressor electrical terminal venting can the variavble speed ECM motor at fan demand provided by be dangerous.

  • Page 36: S-17B Ground Test

    SERVICING 1. Remove the leads from the compressor terminals. See warnings S-17 before removing compressor terminal cover. OHMMETER 2. Check between U-W, U-V and V-W. All readings should be equal between 0.7 Ohms up to 1.1 Ohms. WARNING Damage can occur to the glass embedded terminals if the leads are not properly removed.

  • Page 37: S-40A Avpvc Heater Control

    SERVICING Electric Heat Sequencer Outputs S-40A AVPVC HEATER CONTROL Description The AVPVC models utilize an electronic control that provides ECM blower motor control and control of up to two electric heat se- HIGH VOLTAGE! quencers. The control has thermostat inputs for up to two stages Disconnect ALL power before servicing of cooling, two stages of electric heat, reversing valve, and dehu- or installing.

  • Page 38: Checking Heater Limit Control(S)

    SERVICING Voltages between the two data lines and between each data line and common may be used to determine if the network is operat- ing properly. HIGH VOLTAGE! Disconnect ALL power before servicing Do the following to measure the voltages on the communications or installing.

  • Page 39: S-61A Checking Heater Limit Control(S)

    SERVICING TEMPERATURE RISE (°F) @ 240V 14.4 19.2 24.0 28.8 HIGH VOLTAGE! Disconnect ALL power before servicing or installing. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death. 1000 1100 1200 1.

  • Page 40: Leak Testing (Nitrogen Or Nitrogen-Traced)

    SERVICING 2. Plug or cap all openings. S-102 EVACUATION 3. Remove all burrs and clean the brazing surfaces of the tubing WARNING with sand cloth or paper. Brazing materials do not flow well on oxidized or oily surfaces. REFRIGERANT UNDER PRESSURE! Failure to follow proper procedures may cause 4.

  • Page 41: Charging

    SERVICING CAUTION Use refrigerant certified to AHRI standards. Used HIGH SIDE LOW SIDE refrigerant may cause compressor damage. Most GAUGE GAUGE portable machines cannot clean used refrigerant AND VALVE AND VALVE to meet AHRI standards. 800 PSI RATED HOSES Operating the compressor with the suction valve CHARGING closed will cause serious compressor damage.

  • Page 42: Checking Compressor Efficiency

    SERVICING The bulb must be securely fastened with two straps to a clean 5. With the system still running, remove hose and reinstall both straight section of the suction line. Application of the bulb to a valve caps. horizontal run of line is preferred. If a vertical installation can- 6.

  • Page 43: Checking Expansion Valve Operation

    SERVICING 2. For best results, temporarily install a thermometer on the If subcooling is low and superheat is 7 to 9°F, add liquid line at the liquid line service valve and 4-6" from the charge to rise subcooling to 7 to 9°F, then check super- compressor on the suction line.
  • Page 44 SERVICING R-410A Pressure vs. Temperature Chart PSIG °F PSIG °F PSIG °F PSIG °F PSIG °F PSIG °F -37.7 114.0 37.8 216.0 74.3 318.0 100.2 420.0 120.7 522.0 137.6 -34.7 116.0 38.7 218.0 74.9 320.0 100.7 422.0 121.0 524.0 137.9 -32.0 118.0 39.5...
  • Page 45 SERVICING Required Liquid Line Temperature LIQUID PRESSURE REQUIRED SUBCOOLING TEMPERATURE (°F) AT SERVICE VALVE (PSIG)

  • Page 46: Checking Subcooling

    There are other causes for high head pressure which may be NOTE: The Flushing Method using R-11 refrigerant is no longer found in the "Service Problem Analysis Guide." approved by Amana® Brand Heating-Cooling. If other causes check out normal, an overcharge or a system S-120 REFRIGERANT PIPING containing non-condensables would be indicated.
  • Page 47 SERVICING PVE oils maintain a consistent viscosity over a large temperature range which aids in the oil return to the compressor; however, there will be some installations which require oil return traps. These installations should be avoided whenever possible, as adding oil traps to the refrigerant lines also increases the opportunity for debris and moisture to be introduced into the system.
  • Page 48 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 49 SERVICING Long Radius Street Ell 45° 45° Street Ell Short Radius Street Ell Figure 3-1. Oil Trap SECTION 4. OUTDOOR UNIT IS BELOW THE INDOOR UNIT Condenser BELOW Evaporator Maximum line set equivalent length of 250 ft*. The maximum line set actual length is 200 ft. *Accounts for pressure losses of any elbows, bends, etc.

  • Page 50: Duct Static Pressures And/Or Static Pressure Drop Across Coils

    SERVICING S-202 DUCT STATIC PRESSURES AND/OR STATIC PRESSURE The following table shows refrigerant amount for every 5 feet of line. DROP ACROSS COILS This minimum and maximum allowable duct static pressure for Unit Tonnage the indoor sections are found in the specifications section. Tables are also provided for each coil, listing quantity of air (CFM) 2-Ton 3-Ton...

  • Page 51: Coil Static Pressure Drop

    SERVICING If external static pressure is being measured on a furnace to de- If the total external static pressure and/or static pressure drop termine airflow, supply static must be taken between the "A" coil exceeds the maximum or minimum allowable statics, check for and the furnace.
  • Page 52 SERVICING INDOOR UNIT TROUBLESHOOTING 24VAC Auxiliary Alarms FUSE Seven Segment Green CFM LED Dip Switches Communicating Board and the error message is removed. The error will be main- UXILIARY LARM WITCH tained in the equipment’s fault history. See FIGURE 15 on the The control is equipped with two Auxiliary Alarm terminals, following page for the connection location.
  • Page 53 SERVICING Airflow Table NOTE: Upon start up in communicating mode the circuit board may display an “Ec” error. This is an indication that the dip switches on the control board need to be Airflow Model Level configured in accordance with the Electric Heating Airflow Table. Configuring the High dip switches and resetting power to the unit will clear the error code.
  • Page 54 SERVICING DIAGNOSTIC CODES 7 SEGMENT LED DESCRIPTION OF CONDITION (characters will alternate) (no display) INTERNAL CONTROL FAULT / NO POWER STANDBY, WAITING FOR INPUTS HEATER KIT TOO LARGE, TOO SMALL, OR NO MATCH FUSE OPEN AUXILIARY SWITCH OPEN DATA NOT ON NETWORK INVALID DATA ON NETWORK INVALID MEMORY CARD DATA BLOWER MOTOR NOT RUNNING...
  • Page 55 SERVICING INDOOR UNIT ERROR CODES...
  • Page 56 SERVICING INDOOR UNIT ERROR CODES...
  • Page 57 SERVICING INDOOR UNIT ERROR CODES...
  • Page 58 SERVICING INDOOR UNIT ERROR CODES...
  • Page 59 SERVICING INDOOR UNIT ERROR CODES...
  • Page 60 SERVICING DVANCED ENUS CONFIGURATION SUBMENU ITEM INDICATION (FOR DISPLAY ONLY; NOT USER MODIFIABLE) System A/C Tonnage Displays the air conditioning tonnage. Model Number Displays the air conditioner model number. Serial Number Displays the air conditioner serial number. INV Software Displays the air conditioner inverter software version. CTRL Software Displays the air conditioner control software version.
  • Page 61 SERVICING DVANCED ENUS SYSTEM MAINTENANCE SUBMENU ITEM USER MODIFIABLE OPTIONS COMMENTS Enter PUMP DOWN Mode. This procedure runs the equipment for approximately 15 minutes and allows accumulation of PUMP DOWN ON or OFF refrigerant at the outdoor unit for purposes of removing & replacing the indoor unit or outdoor unit.

  • Page 62: Setting The Mode Display

    SETTING THE MODE DISPLAY MODE DISPLAY INTRODUCTION A 3-digit display is provided on the printed circuit board (PCB) as a backup tool to the thermostat for reading faults, fault history, monitoring and setting up the condensing unit. Follow the information provided in this section to learn how to use the mode display.
  • Page 63 SETTING THE MODE DISPLAY NAVIGATING THROUGH THE DISPLAY SCREENS SCREEN ZERO The home or default screen on the display. This shows the most recent fault. SCREEN ONE To access, hold the RECALL button from screen zero - 5 seconds. SCREEN TWO To access, hold the RECALL button from screen one - 5 seconds.
  • Page 64 SETTING THE MODE DISPLAY FAULT CODE HISTORY NAVIGATION < SCREEN ONE > 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 65 SETTING THE MODE DISPLAY MONITORING MODE NAVIGATION < SCREEN ZERO > < SCREEN TWO > This screen allows the user to monitor system variables as shown in the tables at the end of this section. Blink interval: < SCREEN ONE > 0.4 sec.
  • Page 66 SETTING THE MODE DISPLAY SETTINGS MODE 1 NAVIGATION < SCREEN THREE > < SCREEN ZERO > Setting Mode 1 allows the user to adjust system settings as shown in the tables at the end of this section. Blink interval: < SCREEN TWO > 0.4 sec.
  • Page 67 SETTING THE MODE DISPLAY SETTINGS MODE 2 < SCREEN FOUR > < SCREEN ZERO > 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 68 7-SEGMENT DISPLAY SCREEN 0 (Display FAULT CODE) Setting Contents Notes Fault code (pres ent) SCREEN 1 (Display FAULT CODES) Setting Contents Notes Fault code (lates t) Lates t Fault code (2nd) Fault code (3rd) Fault code (4th) Fault code (5th) Fault code (6th) SCREEN 2 (MONITOR MODE) Setting...
  • Page 69 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 Hi 3: -6% 9: 12% 4: -3% 10: 15% 5: 0% 0: -15% 6: 3% 1: -12% 7: 6% 2: -9%...

  • Page 70: Fault Code (2Nd)

    TROUBLESHOOTING OUTDOOR UNIT ERROR CODES ClimateTalk PCB LED Transmitted Thermostat Fault Probable Causes Corrective Actions Fault Code Display ClimateTalk Message ● High electrical noise Indicates a general memory error. ● Replace control board if necessary OD CTRL FAIL1 ● Faulty control board ●...
  • Page 71 TROUBLESHOOTING OUTDOOR UNIT ERROR CODES ClimateTalk PCB LED Transmitted Thermostat Fault Probable Causes Corrective Actions Fault Code Display ClimateTalk Message ● Wiring to control board disconnected Indicates the control board may need to be ● Check wiring to control board; Repair as needed ●...
  • Page 72 TROUBLESHOOTING OUTDOOR UNIT ERROR CODES ClimateTalk PCB LED Transmitted Thermostat Fault Probable Causes Corrective Actions Fault Code Display ClimateTalk Message The control is unable to enter the Pump Down ● Turn off heater using thermostat before ● Heat provided by secondary heating source Mode because indoor heat has been turned on by NO PUMP DOWN operation...
  • Page 73 TROUBLESHOOTING OUTDOOR UNIT ERROR CODES ClimateTalk PCB LED Transmitted Thermostat Fault Probable Causes Corrective Actions Fault Code Display ClimateTalk Message Items below are messages only displayed on the thermostat screen. This test is required at startup. Installer should navigate to the ComforrtNet User Menu, choose Air ●...

  • Page 74: Thermistor Resistance

    THERMISTOR RESISTANCE AND TEMPERATURE CHARACTERISTICS Tm : Coil Tl : Liquid Td : Discharge Ta : Ambient Thermistor Thermistor Thermistor Thermistor TEMP TEMP Volts Volts Volts Volts Resistance Resistance Resistance Resistance ℃ R（kΩ） DC（V) R（kΩ） DC（V) R（kΩ） DC（V) R（kΩ） DC（V) 364.43 4.58 364.43...

  • Page 75: Wiring Diagram

    WIRING DIAGRAM AVXC200241**; AVXC200361** Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
  • Page 76 WIRING DIAGRAM AVXC200241**; AVXC200361** Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
  • Page 77 WIRING DIAGRAM AVXC200481** Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
  • Page 78 WIRING DIAGRAM AVXC200481** Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
  • Page 79 WIRING DIAGRAM AVXC200601** Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
  • Page 80 WIRING DIAGRAM AVXC200601** Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
  • Page 81 WIRING DIAGRAM HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. COLOR CODES: HTR1 HTR2 PK ---- PINK HTR1 HTR1 HTR2 HTR1 BR ---- BROWN...
  • Page 82 WIRING DIAGRAM HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. COLOR CODES : HTR1 HTR2 PK ---- PINK HTR 1 HTR 1 HTR2 BR ---- BR OWN...

This manual is also suitable for:

Avxc200241Avxc200361Avxc200481Avxc200601

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