Daikin DZ20VC Service Instructions Manual
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Daikin DZ20VC Service Instructions Manual

Inverter heat pump condenser units with r-410a refrigerant blowers, coils, & accessories
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DZ20VC Inverter Heat Pump Condenser Units
O
NLY PERSONNEL THAT HAVE BEEN TRAINED TO INSTALL
(
, "
")
REPAIR
HEREINAFTER
SERVICE
MANUAL SHOULD SERVICE THE EQUIPMENT
BE RESPONSIBLE FOR ANY INJURY OR PROPERTY DAMAGE ARISING FROM
IMPROPER SERVICE OR SERVICE PROCEDURES
ASSUME RESPONSIBILITY FOR ANY INJURY OR PROPERTY DAMAGE WHICH MAY
. I
,
RESULT
N ADDITION
IN JURISDICTIONS THAT REQUIRE ONE OR MORE
LICENSES TO SERVICE THE EQUIPMENT SPECIFIED IN THIS MANUAL
LICENSED PERSONNEL SHOULD SERVICE THE EQUIPMENT
,
,
INSTALLATION
ADJUSTMENT
Servicing OR REPAIR OF THE EQUIPMENT
,
SPECIFIED IN THIS MANUAL
OR ATTEMPTING TO INSTALL
REPAIR THE EQUIPMENT SPECIFIED IN THIS MANUAL WITHOUT PROPER
TRAINING MAY RESULT IN PRODUCT DAMAGE
.
INJURY OR DEATH
Service Instructions
with R-410A Refrigerant
Blowers, Coils, & Accessories
,
,
ADJUST
SERVICE OR
THE EQUIPMENT SPECIFIED IN THIS
. T
HE MANUFACTURER WILL NOT
. I
F YOU SERVICE THIS UNIT
,
ONLY
. I
MPROPER
,
,
ADJUST
SERVICE OR
,
,
PROPERTY DAMAGE
PERSONAL
© 2014-2017, 2020
FOR CALIFORNIA CONSUMERS
,
YOU
PROP 65 WARNING
WARNING
Cancer and Reproductive Harm
www.P65Warnings.ca.gov
-
0140M00517-A
RSD6215002r8
September 2020

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  • Page 1 Service Instructions DZ20VC Inverter Heat Pump Condenser Units with R-410A Refrigerant Blowers, Coils, & Accessories PROP 65 WARNING FOR CALIFORNIA CONSUMERS NLY PERSONNEL THAT HAVE BEEN TRAINED TO INSTALL ADJUST SERVICE OR WARNING , “ ”) REPAIR HEREINAFTER SERVICE THE EQUIPMENT SPECIFIED IN THIS...
  • Page 2 TROUBLESHOOTING - OUTDOOR UNIT ...... 69 - 75 product. For further assistance, please contact: THERMISTOR RESISTANCE CONSUMER INFORMATION LINE - DAIKIN BRAND PRODUCTS & TEMPERATURE CHARACTERISTICS ....... 76 TOLL FREE 1-855-770-5678 (U.S. only) PRESSURE VS TEMPERATURE CHART ......77 email us at: customerservice@daikincomfort.com...
  • Page 3 NLY USE AIKIN APPROVED COMMUNICATING THERMOSTATS (”EPA”) NITED TATES NVIRONMENTAL ROTECTION GENCY DAIKIN ONE+ PPROVED COMMUNICATING THERMOSTATS ARE HAS ISSUED VARIOUS REGULATIONS REGARDING THE INTRODUCTION CTK04AE . (H SMART THERMOSTAT AND OR NEWER EREINAFTER AND DISPOSAL OF REFRIGERANTS INTRODUCED INTO THIS UNIT “T...
  • Page 4 V - Variable Speed C - ComfortNet 4-Wire Ready N - Nominal T - Two Stage 11,12 Brand Engineering* D - Daikin Single-Piece Major & Minor revisions Air Handler *Not used for inventory management Refrigerant Compatability 4 - R-410A Variable-Speed Motor...
  • Page 5 ACCESSORIES EXPANSION VALVES DZ20VC***1** Model Name TXV-Kit DZ20VC0241** TXV-V24 DZ20VC0361** TXV-V36 DZ20VC0481** TXV-V48 DZ20VC0601** TXV-V60 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...
  • Page 6 ACCESSORIES DV**PEC EATER MODELS DV25PECB14A* DV37PECC14A* DV59PECD14A* DV61PECD14A* *Revision level that 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 thermostat and DIP switch on indoor unit control board.
  • Page 7 TESTING CAPACITOR RESISTANCE 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...
  • Page 8 TESTING CAPACITOR RESISTANCE 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...
  • Page 9 REPLACING THE CONTROL BOARD 1. Remove the fixing screw A. WARNING 2. Lift the cover and open it in the direction shown in the figure. HIGH VOLTAGE ! ISCONNECT POWER BEFORE SERVICING OR 3. Remove fixing screws B affixing the sheet metal plate. INSTALLING ULTIPLE POWER SOURCES MAY BE 4.
  • Page 10 DZ20VC models are available in 2 through 5 ton sizes and use R- give up heat until it condenses to a liquid alone. Once the vapor is 410A refrigerant.
  • Page 11 EE THERMOSTAT MANUAL FOR DETAILED For detailed procedure to access the these functions, please INFORMATION visit the Daikin One+ Smart Thermostat website at http:// www.daikinone.com. If using a CTK04 thermostat, please see A system test is now required to check the equipment settings the addendum for further instructions.
  • Page 12 SYSTEM OPERATION Daikin One+ System Advanced Features The Daikin One+ system permits access to additional system YSTEM information, advanced setup features, and advanced The mandatory system verification test is enabled from this disgnostic/troubleshooting features. These advanced features SYSTEM TEST menu, which enables a functional check of the are organized into a menu structure.
  • Page 13 * The specification of DZ20VC0241BD, 0361BC, 0481BC and indoor unit installation manual. The latest manual can be 0601BC or earlier models are different from this specification. obtained from the website “DAIKIN CITY For details, see the Installation Manual or Service Manual that (Installation Manual/Unitary Split System)” or matches the Major and Minor revision of model name.
  • Page 14 SYSTEM OPERATION [DAIKIN CITY URL] https://www.daikincity.com/Library/ [PartnerLink URL] https://partnerlinkmarketing.goodmanmfg.com/goodman/info- finder-plus 3) At Cool Intermediate and Low speed trim, The Inverter system uses lower compressor speed and lower indoor unit CFM to optimize system performance. To obtain 100% CFM for home circulation, use full Trim setting instead of Int/ Low speed.
  • Page 15 SYSTEM OPERATION COOLING CYCLE NOTICE DZ20VC0601B* HE PECIFICATION OF OR EARLIER MODELS ARE DIFFERENT FROM THIS SPECIFICATION OR DETAILS SEE THE SERVICE MANUAL THAT MATCHES THE MAJOR REVISION OF MODEL NAME Piping Diagram with TXV applicable indoor unit HP/LP Reversing Valve HP/LP sensor Ball Valve...
  • Page 16 SYSTEM OPERATION COOLING CYCLE NOTICE DZ20VC0601B* HE PECIFICATION OF OR EARLIER MODELS ARE DIFFERENT FROM THIS SPECIFICATION OR DETAILS SEE THE SERVICE MANUAL THAT MATCHES THE MAJOR REVISION OF MODEL NAME LEGEND: Tli = Thermistor (Indoor Liquid Temperature) Tl = Thermistor (Outdoor Liquid Temperature) Tgi = Thermistor (Indoor Gas Temperature) Td = Thermistor (Discharge Temperature) ID HP/LP sensor = Indoor High/Low Pressure Sensor...
  • Page 17 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 18 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 19 S-106 OVERFEEDING .............. 30 S-3A THERMOSTAT AND WIRING .......... 20 S-107 UNDERFEEDING ............30 S-3E DAIKIN COMMUNICATING THERMOSTAT ..... 21 S-108 SUPERHEAT ..............30 CHECKING TRANSFORMER AND CONTROL CIRCUIT..21 S-109 CHECKING SUBCOOLING ..........31 S-12 CHECKING HIGH PRESSURE SWITCH ......22...
  • Page 20 SERVICING S-1 CHECKING VOLTAGE 3. If any wires must be replaced, replace with comparable gauge and insulation thickness. 1. Remove outer case, control panel cover, etc., from unit being S-3 CHECKING THERMOSTAT AND WIRING tested. Communicating Thermostat Wiring: The maximum wire length With power ON: for 18 AWG thermostat wire is 250 feet.
  • Page 21 A step-down transformer (208/230 or 115 volt primary to 24 volt THERMOSTAT WIRING secondary) is provided with each indoor unit. This allows ample NOTE: Only use DAIKIN approved communicating thermostats. capacity for use with resistance heaters. The outdoor sections do Approved comunicating thermostats are DAIKIN ONE+ Smart not contain a transformer (see indoor unit Wiring Diagrams.
  • Page 22 SERVICING 3. No voltage indicates faulty transformer, bad wiring, or bad WARNING splices. OLTAGE NOW PRESENT 4. Check transformer primary voltage at incoming line voltage connections and/or splices. 5 If line voltage available at primary voltage side of transformer and wiring and splices good, transformer is inoperative. Re- place the transformer.
  • Page 23 SERVICING Therefore, proper evacuation of a hermetic system is essential at S-17B GROUND TEST the time of manufacture and during servicing. If fuse, circuit breaker, ground fault protective device, etc., has To reduce the possibility of external ignition, all open flame, elec- tripped, this is a strong indication that an electrical problem trical power, and other heat sources should be extinguished or exists and must be found and corrected.
  • Page 24 SERVICING Basic Operation The air handler control receives thermostat inputs from the HIGH VOLTAGE! thermostat. The control operates the variable speed blower motor Disconnect ALL power before servicing at the demand as determined from the thermostat input(s). If a or installing. Multiple power sources demand for electric heat is received, the control will provide a may be present.
  • Page 25 The new air handler control includes advanced diagnostic fea- tures with fault recall, estimated CFM display via 7 segment dis- Line Voltage now present. play of control board, DAIKIN ONE+™ and ComfortNet ready. Diagnostics includes heater kit selection diagnostics, open fuse, 2.
  • Page 26 SETTING WITH COMMUNICATING THERMOSTAT: For a detailed procedure of thermostat heater kit capacity selec- Line Voltage now present. tion process, please visit the DAIKIN ONE+ Smart Thermostat website at http://www.daikinone.com. (If using a CTK04 thermo- S-50 CHECKING HEATER LIMIT CONTROL(S) stat, please see the addendum for further instructions.)
  • Page 27 SERVICING The heating mode temperature rise is dependent upon the system TR=(kW x 3412) x (Voltage Correction) / (1.08 x CFM) airflow, the supply voltage, and the heater kit size (kW) selected. Where: TR = Temperature Rise Use data provided in below tables to determine the temperature rise (°F).
  • Page 28 SERVICING S-100 REFRIGERATION REPAIR PRACTICE DANGER To avoid possible explosion, the line from the nitrogen cylinder must include a pressure regulator Always remove the refrigerant charge in a proper and a pressure relief valve. The pressure relief valve manner before applying heat to the system. must be set to open at no more than 150 PSIG.
  • Page 29 SERVICING open the valve to the vacuum thermocouple gauge. See that S-103 CHARGING the vacuum pump will blank-off to a maximum of 25 microns. WARNING A high vacuum pump can only produce a good vacuum if its oil is non-contaminated. REFRIGERANT UNDER PRESSURE! * Do not overcharge system with refrigerant.
  • Page 30 THE VALVES PROVIDED BY DAIKIN ARE DESIGNED TO MEET THE 5. With the system still running, remove hose and reinstall both SPECIFICATION REQUIREMENTS FOR OPTIMUM PRODUCT OPERA- valve caps.
  • Page 31 SERVICING 5. Compare the hi-pressure reading to the "Required Liquid Line CAUTION Temperature" chart. Find the hi-pressure value on the left col- To prevent personal injury, carefully connect and umn. Follow that line right to the column under the design disconnect manifold gauge hoses.
  • Page 32 SERVICING 105°F. If ambient temperature is out of range, don’t adjust subcooling. subcooling. 2. For best results, temporarily install a thermometer on the liquid line at the liquid line service valve. Ensure the 2. For best results, temporarily install a thermometer on the liquid line at the liquid line service valve and 4-6"...
  • Page 33 Do not allow the sludge or oil to contact the skin. Severe burns may result. NOTE: The Flushing Method using R-11 refrigerant is no longer approved by Daikin Brand Heating-Cooling. S-120 REFRIGERANT PIPING The piping of a refrigeration system is very important in relation to system capacity, proper oil return to compressor, pumping rate of compressor and cooling performance of the evaporator.
  • Page 34 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 35 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 36 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 1. The maximum elevation (vertical) difference between the outdoor unit and the indoor unit is 90 feet. 2.
  • Page 37 SERVICING S-202 DUCT STATIC PRESSURES AND/OR STATIC PRESSURE DROP ACROSS COILS This minimum and maximum allowable duct static pressure for the indoor sections are found in the specifications section. Tables are also provided for each coil, listing quantity of air (CFM) versus static pressure drop across the coil.
  • Page 38 SERVICING S-204 COIL STATIC PRESSURE DROP System Operating Airflow Demand System Mode Source 1. Using a draft gauge (inclined manometer), connect the posi- Cooling Outdoor Unit tive probe underneath the coil and the negative probe above Heat Pump Heating the coil. Outdoor Unit Only 2.
  • Page 39 SERVICING INDOOR UNIT TROUBLESHOOTING FOR TXV APPLICABLE UNIT (MBVC**00AA-1) 24VAC Auxiliary Alarms FUSE Seven Segment Green CFM LED Dip Switches Communicating Board UXILIARY LARM WITCH and the error message is removed. The error will be main- 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 40 SERVICING INDOOR UNIT TROUBLESHOOTING FOR TXV APPLICABLE UNIT (MBVC**00AA-1) 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 configured in accordance with the Electric Heating Airflow Table. Configuring the dip switches and resetting power to the unit will clear the error code.
  • Page 41 SERVICING INDOOR UNIT TROUBLESHOOTING FOR TXV APPLICABLE UNIT (MBVC**00AA-1) DIAGNOSTIC CODES...
  • Page 42 SERVICING INDOOR UNIT ERROR CODES INDOOR UNIT TROUBLESHOOTING FOR TXV APPLICABLE UNIT (MBVC**00AA-1)
  • Page 43 SERVICING INDOOR UNIT ERROR CODES INDOOR UNIT TROUBLESHOOTING FOR TXV APPLICABLE UNIT (MBVC**00AA-1)
  • Page 44 SERVICING INDOOR UNIT ERROR CODES INDOOR UNIT TROUBLESHOOTING FOR TXV APPLICABLE UNIT (MBVC**00AA-1)
  • Page 45 SERVICING INDOOR UNIT ERROR CODES INDOOR UNIT TROUBLESHOOTING FOR TXV APPLICABLE UNIT (MBVC**00AA-1)
  • Page 46 SERVICING TROUBLESHOOTING-INDOOR UNIT FOR EEV APPLICABLE UNIT 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 INDOOR UNIT CONTROL BOARD UXILIARY LARM WITCH motor and displaying the proper fault codes.
  • Page 47 SERVICING TROUBLESHOOTING-INDOOR UNIT FOR EEV APPLICABLE UNIT NOTE: Upon start up in communicating mode the circuit board 7 Segment may display an “Ed” error. This is an indication that the dip Diagnostic switches on the control board need to be configured in accor- Fault Displays dance with the Electric Heating Airflow Table.
  • Page 48 SERVICING TROUBLESHOOTING-INDOOR UNIT FOR EEV APPLICABLE UNIT DIAGNOSTIC CODES DIAGNOSTIC CODES 7 SEGMENT LED DESCRIPTION OF CONDITION DISPLAY Normal Operation NO HTR KIT INSTALLED - SYSTEM CALLING FOR AUXILIARY HEAT (Minor Error Code) HEATER KIT DIP SWITCHES NOT SET PROPERLY FUSE OPEN AUXILIARY SWITCH OPEN DATA NOT ON NETWORK...
  • Page 49 SERVICING TROUBLESHOOTING-INDOOR UNIT FOR EEV APPLICABLE UNIT 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) FAN ONLY (Fan Dema nd-Manua l )
  • Page 50 SERVICING TROUBLESHOOTING-INDOOR UNIT FOR EEV APPLICABLE UNIT 2-digit 7 segment displays 3. When the unit is havingsome minor error code in normalmode,2-digit 7 segmentdisplaysshow error code and air owstatus. 2. Error code 3. Air ow 4. When the unit is havingsome minor error code during defrost opera onin normalmode, 2-digit 7 segmentdisplaysshow state “dF”, error code and air owstatus.
  • Page 51 SERVICING SETTING THE MODE DISPLAY TROUBLESHOOTING-INDOOR UNIT FOR EEV APPLICABLE UNIT MODE DISPLAY INTRODUCTION A 2-digit display is provided on the Control Board 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 52 SERVICING SETTING THE MODE DISPLAY TROUBLESHOOTING-INDOOR UNIT FOR EEV APPLICABLE UNIT <SCREEN ZERO> First Error Code Idle Release Fault Recall in less than 2 sec mins. Press Fault Recall for Error Code Second Error Code Hold Fault Recall for more than 2 sec Solid Display Press Fault Recall...
  • Page 53 SERVICING INDOOR UNIT (DV*PEC*) ERROR CODES...
  • Page 54 SERVICING INDOOR UNIT (DV*PEC*) ERROR CODES...
  • Page 55 SERVICING EMERGENCY MODE FOR EEV APPLICABLE INDOOR 1. HEATING EMERGENCY MODE UNIT Emergency Heating mode is to be used when communica- tion between the indoor unit and thermostat is not func- tioning 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 56 SERVICING 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 57 SERVICING 2. COOLING EMERGENCY MODE Dip Switch Position Cooling emergency mode is to be used when communica- Function tion between the indoor and outdoor units is not func- DS2-1 DS2-2 tioning properly and temporary cooling operation is re- quired. This mode enables the outdoor unit and indoor Normal Operation unit to run independently of each other.
  • Page 58 SERVICING TROUBLESHOOTING-OUTDOOR UNIT AND INDOOR UNIT FOR EEV APPLICABLE UNIT Dipswitch Default Factory Settings Switch # Setting Function No Use No Use Indoor Unit DS-1 No Use No Use No Use No Use Indoor Unit DS-2 No Use No Use Heater Kit Selection in Emergency Mode Heater Kit Selection in Emergency Mode Indoor Unit...
  • Page 59 SERVICING COOLING EMERGENCY MODE WIRING FOR TXV APPLI- CABLE INDOOR UNIT Cooling emergency mode is available when using a TXV applicable indoor unit. To energize the blower at the appropriate speed, standard Legacy wiring is required. The image below shows how the thermo- stat input terminals are to be wired when selecting a cooling airflow.
  • Page 60 SETTING THE MODE DISPLAY-OUTDOOR UNIT 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 61 SETTING THE MODE DISPLAY-OUTDOOR UNIT 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 62 SETTING THE MODE DISPLAY-OUTDOOR UNIT 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 63 SETTING THE MODE DISPLAY-OUTDOOR UNIT 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 64 SETTING THE MODE DISPLAY-OUTDOOR UNIT 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 65 SETTING THE MODE DISPLAY-OUTDOOR UNIT 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 66 7-SEGMENT DISPLAY-OUTDOOR UNIT 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 67 7-SEGMENT DISPLAY-OUTDOOR UNIT SCREEN 3 (SETTING MODE 1) SCREEN 3 (SETTING MODE 1) Setting No. Contents Setting Installer/Serviceman Notes *1, *2 Cool Airflow Trim High 0: -15% 2: -5% 4: 5% 6: 15% 1: -10% 3: 0% 5: 10% Cool Airflow Trim Int 0: -15% 3: 0% 6: 15%...
  • Page 68 7-SEGMENT DISPLAY-OUTDOOR UNIT SCREEN 4 (SETTING MODE 2) Setting Contents Setting Installer / Serviceman Notes 0: 30min. 1: 60min. Maximum Defrost Interval 2: 90min. 3: 120min. Set Maximum Current Future Use 0:Same Level 1:Outdoor Lower Vertical Rise 2:Indoor Lower 0:ON 1:OFF System Verification Test (System Test) 0:ON...
  • Page 69 TROUBLESHOOTING OUTDOOR UNIT ERROR CODES Control Transmitted Climate Fault Code Board LED Thermostat Fault Probable Causes Corrective Actions Talk Message *1 Display Indicates a general memory • High electrical noise OD CTRL FAIL1 • Replace control board if necessary error. •...
  • Page 70 TROUBLESHOOTING OUTDOOR UNIT ERROR CODES Transmitted Control Board Fault Code Climate Thermostat Fault Probable Causes Corrective Actions LED Display Talk Message *1 • Check discharge thermistor resistance • Discharge thermistor inoperable This error indicates the and connections; Repair/replace as or improperly connected equipment is experiencing needed •...
  • Page 71 TROUBLESHOOTING OUTDOOR UNIT ERROR CODES Transmitted Control Board Fault Code Climate Thermostat Fault Probable Causes Corrective Actions LED Display Talk Message *1 • Check installation clearances. • Check the opening of stop valve, should be • Short circuit condition full open; Repair/replace if needed •...
  • Page 72 TROUBLESHOOTING OUTDOOR UNIT ERROR CODES Control Board Transmitted Climate Fault Code Thermostat Fault Probable Causes Corrective Actions LED Display Talk Message *1 This error indicates the equipment is experiencing • Obstruction in fan rotation • Check and clean grille of any debris frequent outdoor control board •...
  • Page 73 TROUBLESHOOTING-OUTDOOR UNIT 8. Connect the Climate Talk (CT) connector to the outdoor unit. RITING HARED ATA TO UTDOOR SING 9. Turn the power ON to the outdoor unit. EMORY 10. Continue the operation of the unit as desired. Check Troubleshooting codes to determine the need to flash shared data to outdoor unit.
  • Page 74 TROUBLESHOOTING-OUTDOOR UNIT Zoomed view of 20 SEER OD Control Board...
  • Page 75 TROUBLESHOOTING-OUTDOOR UNIT NETWORK TROUBLESHOOTING If a network communication error code has occurred, use the following steps to help troubleshoot the system. (For network communication error codes, refer to the table below and the tables of error codes for outdoor unit and indoor unit.) After any wiring changes have been made or DS1 dip switches on the outdoor unit control board have been...
  • Page 76 THERMISTOR RESISTANCE AND TEMPERATURE CHARACTERISTICS 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 77 PRESSURE vs TEMPERATURE CHART 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...
  • Page 78 LIQUID LINE TEMPERATURE CHART Required Liquid Line Temperature LIQUID PRESSURE REQUIRED SUBCOOLING TEMPERATURE (°F) AT SERVICE VALVE (PSIG)
  • Page 79 WIRING DIAGRAM - 2 T DZ20VC0241** 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 - 3-5 T DZ20VC0[36-48]1** and DZ20VC0601C* (or later) NOTICE DZ20VC0601B* HE PECIFICATION OF OR EARLIER MODELS ARE DIFFERENT FROM THIS SPECIFICATION OR DETAILS SEE THE SERVICE MANUAL THAT MATCHES THE MAJOR REVISION OF MODEL NAME 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. INDOOR UNIT FOR TXV APPLICABLE UNIT (MBVC**00AA-1) Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
  • Page 82 CTK04 ADDENDUM INDOOR UNIT FOR EEV APPLICABLE UNIT (DV*PEC*) RAM MONITOR FLASH WRITER SHARE DATA...
  • Page 83 CTK04 ADDENDUM CTK04** COMFORTNET THERMOSTAT UTDOOR NDOOR IRING Low voltage wiring consists of two wires between the indoor unit VERVIEW and outdoor unit and four wires between the indoor unit and the The ComfortNet™ system (or CT system) is a system that includes thermostat.
  • Page 84 CTK04 ADDENDUM HERMOSTAT CREEN 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 85 CTK04 ADDENDUM 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 86 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 87 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 88 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. Select MAINTENANCE.
  • Page 89 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 cooling or heating mode depending on if the mode thermostat is set at COOL or HEAT MODE from the SYSTEM menu on the main screen.
  • Page 90 CTK04 ADDENDUM BOOST MODE BOOST MODE enables the system to operate at a higher com- pressor speed than rated maximum compressor speed and satisfy the structural load more effectively during higher am- bient outdoor conditions. BOOST MODE is initiated by an out- door temperature sensor located in the outdoor unit.
  • Page 91 CTK04 ADDENDUM 3. Enter Installer password, if known. The password is the thermostat date code and can be obtained by selecting the red Cancel button and selecting the Dealer Information button. Once recorded, click the green OK button and return to previous step. 4.
  • Page 92 CTK04 ADDENDUM 7. BOOST MD turns BOOST MODE OFF or ON. BOOST MODE is ON by default..Heat Pump > SYS SETUP > BOOST MD 8. BOOST TEMP adjusts the activation temperature from 70°F to 105°F. “Always ON” option is also available to permanently engage BOOST MODE.
  • Page 93 CTK04 ADDENDUM Once satisfied with BOOST MODE adjustments, navigate to the HOME screen by selecting the Previous Menu button three times then selecting HOME. DEHUMIDIFICATION 8. From the Dehumidification Menu select A/C with Low Speed The thermostat reads the indoor humidity level and allows the Fan and click the green Done button.
  • Page 94 CTK04 ADDENDUM DEHUMIDIFICATION SELECT* When Dehumidification mode exists, the circulating fan output is reduced, increasing system run time, over cooling the evaporator coil and ultimately removing more humidity from the structure than if only in cooling mode. The system can have Dehumidification operation in setting “STD”, “A”, “B”...
  • Page 95 CTK04 ADDENDUM 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 oper- ate in cooling or heating mode can be changed using thermostat. Maximum compressor speed can be changed to get the required capacity or efficiency.
  • Page 96 CTK04 ADDENDUM 4. Select YES to continue. 5. Select HEAT PUMP. 6. Select CL RUN VALUES: for cooling mode HT RUN VALUES: for heating mode 7. Select COOL/HEAT RPS RANGE. Press COOL RPS RANGE (for cooling mode) or HEAT RPS RANGE (heating mode) to select the range in which the desired Maximum compressor speed falls.
  • Page 97 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 HOME screen. Enter normal operation with temperature offset or thermostat schedule, as desired. HERMOSTAT TO DJUST NDOOR...
  • Page 98 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. Select COOL SETUP: COOLING MODE HEAT SETUP: HEATING MODE...
  • Page 99 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 100 CTK04 ADDENDUM INDOOR AIRFLOW HERMOSTAT TO DJUST PROFILE, COOL/HEAT ON DELAY COOL/HEAT OFF DELAY DEFROST 1. Please follow the sequence 1. to .6 of S HERMOSTAT DJUST NDOOR 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 101 CTK04 ADDENDUM FORCE DEFROST CYCLE HERMOSTAT TO 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. From the MENU screen, select COMFORTNET™ USER MENU. 3.
  • Page 102 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 103 CTK04 ADDENDUM 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 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 104 CTK04 ADDENDUM 4. Select YES to continue. 5. Select HEAT PUMP . 6. Select MAINTENANCE. 7. Select PUMP DOWN.
  • Page 105 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 106 CTK04 ADDENDUM PUMP DOWN EGMENT ISPLAY TO 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 107 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) Outdoor Air Temperature, Outdoor Fan speed...
  • Page 108 CTK04 ADDENDUM TROUBLESHOOTING-INDOOR UNIT FOR EEV APPLICABLE UNIT IRECTIONS TO OMFORT YSTEM DVANCED EATURE ENUS Press MENU, scroll down and press COMFORTNET USER MENU. Enter the date code (password) when prompted. The date code is printed on the back of the thermostat; or press MENU>EQUIPMENT STATUS and scroll down to find the date code. After you enter the date code, select air handler to view the system menus.
  • Page 109 CTK04 ADDENDUM TROUBLESHOOTING-INDOOR UNIT FOR EEV APPLICABLE UNIT Set-Up SET-UP Submenu Item User Modifiable Options Comments Choose the operation mode of Humidifier OFF*, ON, IND (This selection is only displayed if HUM is selected in ACC) Choose the indoor fan speed at the time of humidification HUM FAN SPD (%) 25%, 50%*, 75% , 100% (This selection is only displayed if IND is selected...
  • Page 110 CTK04 ADDENDUM DVANCED EATURE 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 111 CTK04 ADDENDUM DVANCED EATURE 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 settings. Defaults SET MAX CURRENT Future use. If the outdoor & indoor units are within +/- 15 ft. vertical distance, Same Level, Outdoor Lower, or select SAME LEVEL.
  • Page 112 CTK04 ADDENDUM DVANCED EATURE COOL SETUP SUBMENU ITEM USER MODIFIABLE OPTIONS COMMENTS CL Reset (CL RESET) YES or NO *1, *2 (C TR H) -15% to +15% in 5% increments (C TR I) -15% to +20% in 5% increments, 30%, Full (C TR L) -15% to +20% in 5% increment s , 30%, Full (CL PRFL)A, B, C, or D...

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