Daikin DX6VS 1 A Series Service Instructions Manual
  1. Manuals
  2. Brands
  3. Daikin Manuals
  4. Heat Pump
  5. DX6VS 1 A Series
  6. Service instructions manual
Daikin DX6VS 1 A Series Service Instructions Manual

Daikin DX6VS 1 A Series Service Instructions Manual

Inverter outdoor units, air handlers & cased coils with r-410a refrigerant
Hide thumbs Also See for DX6VS 1 A Series:
Table of Contents

Advertisement

Quick Links

Download this manual
SiUS612209EA
Service Instructions
DX6VS***1*A* / DZ6VS***1*A* Inverter Outdoor Units,
DV**FEC / DFVE** EEV air handlers & CAPE(A)* / CHPE* EEV cased coils
with R-410A Refrigerant
WARNING
Only personnel that have been trained to install, adjust, service or repair(here-
inafter, "service") the equipment specified in this manual should service the
equipment. The manufacturer will not be responsible for any injury or property
WARNING
damage arising from improper service or service procedures. If you service this
unit, you assume responsibility for any injury or property damage which may
result. In addition, in jurisdictions that require one or more licenses to service
DO NOT BYPASS SAFETY DEVICES
the equipment specified in this manual, only licensed personnel should service
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.
© 2022

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the DX6VS 1 A Series and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Daikin DX6VS 1 A Series

Summary of Contents for Daikin DX6VS 1 A Series

  • Page 1 SiUS612209EA Service Instructions DX6VS***1*A* / DZ6VS***1*A* Inverter Outdoor Units, DV**FEC / DFVE** EEV air handlers & CAPE(A)* / CHPE* EEV cased coils with R-410A Refrigerant WARNING Only personnel that have been trained to install, adjust, service or repair(here- inafter, “service”) the equipment specified in this manual should service the equipment.

  • Page 2: Table Of Contents

    WIRING DIAGRAMS ............75 - 80 product. For further assistance, please contact: REMOVAL & REASSEMBLY PROCEDURE ....81 - 127 CONSUMER INFORMATION LINE - DAIKIN BRAND PRODUCTS 1.5 to 3.0 ton models........... 81 - 104 TOLL FREE 1-855-770-5678 (U.S. only) 3.5 to 5.0 ton models..........

  • Page 3: Important Information

    TATES NVIRONMENTAL ROTECTION GENCY A������� ������������� ����������� ��� DAIKIN ONE+ ����� ���������� (H���������� �������� �� �� “T���������”) HAS ISSUED VARIOUS REGULATIONS REGARDING THE INTRODUCTION AND DISPOSAL OF REFRIGERANTS INTRODUCED INTO THIS UNIT AILURE TO FOLLOW THESE REGULATIONS MAY HARM THE...
  • Page 4 IMPORTANT INFORMATION NOTICE: When the outdoor unit is connected to main power, the inverter control board has a small current flowing into it to be prepared for operation when needed. Due to this, the control board components have to be cooled even when the unit is not running.

  • Page 5: Testing Capacitor Dc Voltage

    TESTING CAPACITOR DC VOLTAGE WARNING A���� ������� ���� ��� ������� ����. •N���� ����� ��� ������� ���� ������ ���������� ���� ��� �������� ������� �� 50 ����� �� ����. 1. S��� ���� ��� ����� ��� ����� ��� ������� ��� ��� 10 �������. 2.
  • Page 6 TESTING CAPACITOR DC VOLTAGE 3.5 - 5.0 ton MULTIMETER (DC.VOLTAGE RANGE) USE TESTER TO CHECK THE VOLTAGE DC+ “C+” AND DC- “C-” IS 50 V OR LESS. Capacitor Voltage...

  • Page 7: System Operation

    The inverter system can stop the compressor or outdoor fan to protect the unit. The inverter system can run higher Outdoor AC and HP R-410A model units use a Daikin rota- compressor speed than required from thermostat to recover ry compressor.
  • Page 8 SYSTEM OPERATION PIPING DIAGRAMS AC 1.5 - 3.0 ton AC 3.5 - 5.0 ton...
  • Page 9 SYSTEM OPERATION PIPING DIAGRAMS HP 1.5 - 3.0 ton INDOOR UNIT OUTDOOR UNIT FUSIBLE PRESSURE SERVICE PORT PLUG SENSOR (7/16" FLARE) REVERSING VALVE MUFFLER OUTDOOR HEAT EXCHANGER STOP VALVE CHECK (GAS) INDOOR INDOOR VALVE HEAT EXCHANGER HEAT EXCHANGER SOLENOID VALVE HEAT EXCHANGER HIGH STRAINER...
  • Page 10 SYSTEM OPERATION COOLING OPERATION FLOW...
  • Page 11 SYSTEM OPERATION HEATING OPERATION FLOW...

  • Page 12: Cooling Analysis Chart

    COOLING ANALYSIS CHART...

  • Page 13: Heating Analysis Chart

    HEATING ANALYSIS CHART...

  • Page 14: Servicing

    S-26 TESTING THERMISTOR, EEV COIL AND SOLENOID VALVE COIL RESISTANCE ..21 CHECKING WIRING ........15 S-100 REFRIGERATION REPAIR PRACTICE ..22 S-3E DAIKIN COMMUNICATING THERMOSTAT ... 15 S-104 CHECKING COMPRESSOR EFFICIENCY... 22 CHECKING TRANSFORMER AND CONTROL CIRCUIT ............16 S-114 NON-CONDENSABLE ........

  • Page 15: Checking Voltage

    (24 VAC common). <In Case of EEV Air Handler> WARNING Communica�ng Thermostat INE OLTAGE NOW PRESENT (In case of Daikin One+ Smart Thermostat) 125 �. (*) 2. Using a voltmeter, measure the voltage across L1 and Air Handler Blower L2 terminals of outdoor unit or at the field connections Integrated Control Module for the indoor units or heaters.

  • Page 16: Checking Transformer And Control Circuit

    SERVICING S-4 CHECKING TRANSFORMER AND CONTROL S-12 CHECKING HIGH PRESSURE SWITCH CIRCUIT WARNING WARNING HIGH VOLTAGE ! HIGH VOLTAGE ! ISCONNECT POWER BEFORE SERVICING OR INSTALLING ULTIPLE POWER SOURCES MAY BE ISCONNECT POWER BEFORE SERVICING OR PRESENT AILURE TO DO SO MAY CAUSE PROPERTY INSTALLING ULTIPLE POWER SOURCES MAY BE DAMAGE...
  • Page 17 SERVICING S-13 CHECKING INDOOR UNIT / OUTDOOR S-16G CHECKING EMERSON ULTRATECH™ UNIT PRESSURE SENSOR ECM MOTORS With power ON: DESCRIPTION The indoor unit utilize an Emerson, 4-wire variable speed WARNING ECM blower motor. The ECM blower motor provides constant CFM. OLTAGE NOW PRESENT The motor is a serially communicating variable speed mo- The outdoor and indoor pressure sensor senses low pres-...
  • Page 18 SERVICING To use the diagnostic tool, perform the following steps: Electrical Checks - High Voltage Power Circuits 1. Disconnect power to the indoor unit. 2. Disconnect the 4-circuit control harness from the HIGH VOLTAGE! motor. Disconnect ALL power before servicing or installing.
  • Page 19 SERVICING Electrical Checks - Low Voltage Control Circuits 6. Inspect the large capacitors inside the control/end bell (see figure below). Replace the control/end bell 1. Turn on power to the indoor unit. if any of the capacitors are bulging or swollen. Line Voltage now present.
  • Page 20 SERVICING S-17 CHECKING COMPRESSOR S-17A RESISTANCE TEST Inverter on the outdoor unit control board takes the position WARNING signal from the UVW line connected with the compressor. Hermetic compressor electrical terminal venting can When the system detects the malfunction on the compres- be dangerous.

  • Page 21: S-17B Ground Test

    SERVICING S-17B GROUND TEST To check these thermistors: If fuse, circuit breaker, etc., has tripped, this is a strong in- dication that an electrical problem exists and must be found HIGH VOLTAGE! and corrected. The circuit protective device rating must be Disconnect ALL power before servicing checked, and its maximum rating should coincide with that or installing.

  • Page 22: Refrigeration Repair Practice

    SERVICING S-100 REFRIGERATION REPAIR PRACTICE S-104 CHECKING COMPRESSOR EFFICIENCY The reason for compressor inefficiency is that the compres- DANGER sor is broken or damaged, reducing the ability of the com- Always remove the refrigerant charge in a proper pressor to pump refrigerant vapor. manner before applying heat to the system.

  • Page 23: Compressor Burnout

    SERVICING S-114 NON-CONDENSABLE S-203 AIR HANDLER EXTERNAL STATIC If non-condensable is suspected, shut down the system To determine proper air movement, proceed as follows: and allow the pressures to equalize. Wait at least 15 min- 1. Using a draft gauge (inclined manometer), measure the utes.
  • Page 24 SERVICING S-203A TWO PIECE INDOOR UNIT EXTERNAL Supply Duct STATIC Two piece indoor unit refers to EEV cased coil with Gas Furnace/Modular Blower. To determine proper air movement, proceed as follows: 1. With clean filters in the indoor unit, use a draft gauge EEV Cased Coil (inclined Manometer or Magnehelic gauge) to measure the static pressure of the return duct at the inlet of the...

  • Page 25: Fault Recall (Eev Indoor Units)

    SERVICING FAULT RECALL (EEV INDOOR UNITS) WARNING 7 Segment Diagnostic HIGH VOLTAGE! Fault Displays Recall O AVOID PERSONAL INJURY OR DEATH DUE TO ELECTRICAL SHOCK DISCONNECT ELECTRICAL POWER BEFORE PERFORMING ANY SERVICE OR MAINTENANCE The integrated control module is equipped with a momen- tary push-button switch that can be used to display the last NOTE: For the cased coil application, the active error codes six faults on the 7 segment LED display.

  • Page 26: 2-Digit 7 Segment Displays (Eev Indoor Units)

    SERVICING 2-DIGIT 7 SEGMENT DISPLAYS (EEV INDOOR UNITS) 7 Segment LED WARNING Description of Condition Display(State) HIGH VOLTAGE! (No Display) INTERNAL CONTROL FAULT / NO POWER O AVOID PERSONAL INJURY OR DEATH DUE TO STANDBY, NORMAL MODE ELECTRICAL SHOCK DISCONNECT ELECTRICAL POWER FC * COOLING MODE BEFORE PERFORMING ANY SERVICE OR MAINTENANCE...
  • Page 27 SERVICING 2-DIGIT 7 SEGMENT DISPLAYS (EEV INDOOR UNITS) 3. When the unit is having some minor error code in normal mode, 2-digit 7 segment displays show error code and airflow status. 2. Error code 3. Airflow 4. When the unit is having some minor error code during defrost opera�on in normal mode, 2-digit 7 segment displays show state “dF,”...

  • Page 28: Setting The Mode Display (Eev Indoor Units)

    SERVICING SETTING THE MODE DISPLAY (EEV INDOOR UNITS) 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 EEV indoor units. Follow the informa�on provided in this sec�on to learn how to use the mode display.
  • Page 29 SERVICING SETTING THE MODE DISPLAY (EEV INDOOR UNITS) <SCREEN ZERO> No Display 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 for Error Code...

  • Page 30: Indoor Unit Error Codes (Eev Indoor Units)

    SERVICING INDOOR UNIT ERROR CODES (EEV INDOOR UNITS) TROUBLESHOOTING...
  • Page 31 SERVICING INDOOR UNIT ERROR CODES (EEV INDOOR UNITS) TROUBLESHOOTING...

  • Page 32: Emergency Mode For Eev Applicable Indoor Unit

    SERVICING EMERGENCY MODE FOR EEV APPLICABLE 1. HEATING EMERGENCY MODE INDOOR UNIT Emergency Heating Mode is to be used when communica- tion between each equipment is not functioning properly. There are the following steps to setup Heating Emergency Mode. WARNING HEN SETTING AND WIRING, BE SURE TO TURN OFF THE POWER OF EQUIPMENT FOR EEV CASED COIL...
  • Page 33 SERVICING 2. COOLING EMERGENCY MODE FOR EEV AIR HANDLER This mode will run the electric heat strips independently of Cooling Emergency Mode is to be used when communica- any thermostat in one of two modes: High Heat Level or tion between the indoor and outdoor units is not functioning Low Heat Level.
  • Page 34 SERVICING For EEV CASED COIL For EEV AIR HANDLER There are the following steps to setup Cooling Emergency There are two key steps to setup Cooling Emergency Mode. Mode. 1) Remove the thermostat communication wirings (1, 1) Select the appropriate airflow on the indoor unit and 2, R and C) of all connected equipment (EEV cased enable emergency indoor airflow operation (using Dip coil, Gas Furnace/Modular Blower, Outdoor unit...
  • Page 35 SERVICING Switch Bank DS-4 Switch Bank DS-6 EEV Air Handler Fan Settings EEV Air Handler and Cased Coil Control Board Settings Function Value S-13 S-14 Function S-21 S-22 Normal operation OFF* OFF* OFF* Cooling Emergency mode Fan Only Speed Emergency Mode Heating Emergency mode (High) 100% Heating Emergency mode (Low) *1...

  • Page 36: Setting The Mode Display

    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, error code history, monitoring and setting up the outdoor unit. Follow the information provided in this section to learn how to use the mode display. DISPLAY The display consists of 3 digits.
  • Page 37 SETTING THE MODE DISPLAY NAVIGATING THROUGH THE DISPLAY SCREENS SCREEN 0 The home or default screen on the display. This shows the most recent fault. SCREEN 1 To access, hold the “RECALL” button from screen 0 - 5 seconds. SCREEN 2 To access, hold the “RECALL”...
  • Page 38 SETTING THE MODE DISPLAY ERROR CODE HISTORY NAVIGATION < SCREEN 1 > This mode will allow the user to see the six most recent system faults. For a list of the error codes, please see the TROUBLESHOOTING tables in this document. <...
  • Page 39 SETTING THE MODE DISPLAY MONITORING MODE NAVIGATION < SCREEN 0 > < SCREEN 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 > 0.4 sec.
  • Page 40 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: < SCREEN 2 > 0.4 sec.
  • Page 41 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 42: 7-Segment Display

    7-SEGMENT DISPLAY SCREEN 0 (Error code display) Setting Contents Notes Error code (present) SCREEN 1 (Error code history) Setting Contents Notes Error code (latest) Latest Error code (2nd) Error code (3rd) Error code (4th) Error code (5th) Error code (6th) SCREEN 2 (Monitoring mode) Setting Contents...
  • Page 43 7-SEGMENT DISPLAY SCREEN 3 (Setting mode 1) Installer/ Setting No. Contents Setting Serviceman Notes 0:-15% 4:5% 1:-10% 5:10% Cool Airflow Trim High 2:-5% 6:15% 3:0% 0:-15% 4:5% 8:30% 1:-10% 5:10% 9:Full Cool Airflow Trim Int 2:-5% 6:15% 3:0% 7:20% 0:-15% 4:5% 8:30% 1:-10%...
  • Page 44 7-SEGMENT DISPLAY SCREEN 4 (Setting mode 2) Installer/ Setting No. Contents Setting Serviceman Notes 0: 30min. 1: 60min. Maximum Defrost Interval 2: 90min. 3: 120min. System Verification Test 0:ON 1:OFF (System test) Force Defrost Cycle 0:ON 1:OFF 1:OFF Charge Mode 0:ON 0: -10.0 RPS 1: -9.5 RPS...

  • Page 45: Troubleshooting - Outdoor Unit

    TROUBLESHOOTING OUTDOOR UNIT ERROR CODES Thermostat Control board Probable Causes Corrective Actions Description display LED Display • High electrical noise Indicates a general memory error. • Replace control board if necessary • Faulty control board • Blocked/restricted outdoor unit coil and/or lines •...
  • Page 46 TROUBLESHOOTING OUTDOOR UNIT ERROR CODES Thermostat Control board Probable Causes Corrective Actions Description display LED Display • Faulty outdoor air thermistor or not properly • Check the connection to outdoor air thermistor; Repair/replace if The outdoor air thermistor is open or shorted. connected needed The control determines that the pressure sensor...
  • Page 47 TROUBLESHOOTING OUTDOOR UNIT ERROR CODES Thermostat Control board Probable Causes Corrective Actions Description display LED Display • Verify unit is connected to power supply as specified on rating Control detects a high power supply voltage • High line voltage supply plate condition.
  • Page 48 TROUBLESHOOTING OUTDOOR UNIT ERROR CODES Thermostat Control board Probable Causes Corrective Actions Description display LED Display • Check resistance on OL sensor to verify operation; Replace if • Overload protection (OL) sensor inoperable The Overload Protection sensor for Compressor is needed.

  • Page 49: Applicable Models

    TROUBLESHOOTING OUTDOOR UNIT FLOWCHART Error Code High pressure error 1 Applicable Models 5. Troubleshooting Outdoor AC Diagnosis Corrective Actions Outdoor HP Does manifold Move to A . gauge indicate same high pressure as D-checker? 2 Method of Error [When cooling] Detection Adjust sub-cooling with manifold Overcharge?
  • Page 50 TROUBLESHOOTING OUTDOOR UNIT FLOWCHART Error Code Low pressure error 1 Applicable Models 5. Troubleshooting Outdoor AC Diagnosis Corrective Actions Outdoor HP Does manifold gauge indicate same Move to A . low pressure as D-checker? 2 Method of Error Detection OD pressure sensor failure? Check in accordance with the [Cooling] checking procedure then replace...
  • Page 51 TROUBLESHOOTING OUTDOOR UNIT FLOWCHART Error Code EEV control error 1 Applicable Models 5. Troubleshooting Outdoor AC Diagnosis Corrective Actions Outdoor HP Charge amount of Charge refrigerant correctly. refrigerant is correct? 2 Method of Error Detection Indoor and outdoor Connect properly. EEV coils are connected to Detected by discharge pipe superheat PCB properly?
  • Page 52 TROUBLESHOOTING OUTDOOR UNIT FLOWCHART Error Code High discharge temperature error 1 Applicable Models 5. Troubleshooting Outdoor AC Diagnosis Corrective Actions Outdoor HP Discharge temperature is higher than Check refrigerant leak. the criterion (120°C Check compressor fault. (248°F)). 2 Method of Error Detection Discharge thermistor is connected to PCB...
  • Page 53 TROUBLESHOOTING OUTDOOR UNIT FLOWCHART Error Code Outdoor PCB high temperature error 1 Applicable Models 5. Troubleshooting Outdoor AC 1.5 - 3.0 ton Diagnosis Corrective Actions Outdoor HP 1.5 - 3.0 ton Check inverter fin temperature with D-checker. E32 occurs when the temperature exceeds or is close to the reference value.
  • Page 54 TROUBLESHOOTING OUTDOOR UNIT FLOWCHART Error Code Outdoor PCB high temperature error 1 Applicable Models 5. Troubleshooting Outdoor AC 3.5 - 5.0 ton Diagnosis Corrective Actions Outdoor HP 3.5 - 5.0 ton Check inverter fin temperature with D-checker. E32 occurs when the temperature exceeds or is close to the reference value.

  • Page 55: Refrigerant Shortage

    TROUBLESHOOTING OUTDOOR UNIT FLOWCHART Error Code Refrigerant shortage 1 Applicable Models 5. Troubleshooting Outdoor AC Diagnosis Corrective Actions Outdoor HP Cooling amount of charge correct? Adjust charge per IO manual. SH is proper? 2 Method of Error Detection Check any clogging in refrigerant circuit.
  • Page 56 TROUBLESHOOTING OUTDOOR UNIT FLOWCHART Error Code Outdoor temperature outside of range 1 Applicable Models 5. Troubleshooting Outdoor AC Diagnosis Corrective Actions Outdoor HP Other Actual outdoor temperature Move to A . Cooling mode & Outdoor temperature > 55°C (131°F) 2 Method of Error Outdoor temperature <...
  • Page 57 TROUBLESHOOTING OUTDOOR UNIT FLOWCHART Error Code Refrigerant cooling sweat error 1 Applicable Models 5. Troubleshooting Outdoor HP 3.5 - 5.0 ton Diagnosis Corrective Actions Charge amount of Check refrigerant leak. refrigerant is correct? Charge refrigerant correctly. 2 Method of Error Indoor Detection EEV coil is connected to PCB...
  • Page 58 TROUBLESHOOTING OUTDOOR UNIT FLOWCHART Error Code Overload protection sensor open error 1 Applicable Models 5. Troubleshooting Outdoor AC Diagnosis Corrective Actions Outdoor HP OL is connected to Connect properly. PCB properly? 2 Method of Error Detection OL switch is opened? Replace PCB.
  • Page 59 TROUBLESHOOTING OUTDOOR UNIT FLOWCHART Error Code System mismatch 1 Applicable Models 5. Troubleshooting Outdoor AC Diagnosis Corrective Actions Outdoor HP Is the combination of outdoor Replace to certified combination. and indoor units on the AHRI web site? 2 Method of Error Detection Make sure the airflow trim setting have not set to prohibited value.
  • Page 60 TROUBLESHOOTING INDOOR UNIT FLOWCHART Error Code Blower motor - current trip or lost rotor 1 Applicable Models 5. Troubleshooting EEV air handler Diagnosis Corrective Actions CAUTION Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. 2 Method of Error Detection Obstacles...
  • Page 61 TROUBLESHOOTING INDOOR UNIT FLOWCHART Error Code ID blower motor does not have required parameters to function. Motor fails to start 40 consecutive times. 1 Applicable Models 5. Troubleshooting EEV air handler Diagnosis Corrective Actions CAUTION Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
  • Page 62 TROUBLESHOOTING INDOOR UNIT FLOWCHART Error Code Low indoor airflow (without electric heat mode) 1 Applicable Models 5. Troubleshooting EEV air handler Diagnosis Corrective Actions CAUTION Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. 2 Method of Error Detection Obstacles...
  • Page 63 TROUBLESHOOTING INDOOR UNIT FLOWCHART Error Code Low indoor airflow (with electric heat mode) 1 Applicable Models 5. Troubleshooting EEV air handler Diagnosis Corrective Actions CAUTION Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. 2 Method of Error Detection Obstacles...
  • Page 64 TROUBLESHOOTING INDOOR UNIT FLOWCHART Error Code EEV disconnection detected 1 Applicable Models 5. Troubleshooting EEV air handler Diagnosis Corrective Actions EEV cased coil CAUTION Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. 2 Method of Error Detection Indoor...
  • Page 65 TROUBLESHOOTING INDOOR UNIT FLOWCHART Error Code Liquid side thermistor abnormality 1 Applicable Models 5. Troubleshooting EEV air handler Diagnosis Corrective Actions EEV cased coil CAUTION Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. 2 Method of Error Detection Indoor...
  • Page 66 TROUBLESHOOTING INDOOR UNIT FLOWCHART Error Code Gas side thermistor abnormality 1 Applicable Models 5. Troubleshooting EEV air handler Diagnosis Corrective Actions EEV cased coil CAUTION Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. 2 Method of Error Detection Indoor...

  • Page 67: Pressure Sensor Abnormality

    TROUBLESHOOTING INDOOR UNIT FLOWCHART Error Code Pressure sensor abnormality 1 Applicable Models 5. Troubleshooting EEV air handler Diagnosis Corrective Actions EEV cased coil CAUTION Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. 2 Method of Error Detection Indoor...

  • Page 68: Troubleshooting - Indoor Unit

    TROUBLESHOOTING INDOOR UNIT FLOWCHART Error Code Indoor unit - outdoor unit, Gas furnace or blower unit communication error (during operation) 1 Applicable Models 5. Troubleshooting EEV air handler Diagnosis Corrective Actions EEV cased coil CAUTION Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
  • Page 69 TROUBLESHOOTING INDOOR UNIT FLOWCHART Error Code Indoor unit – thermostat communication error (start-up & during operation) 1 Applicable Models 5. Troubleshooting EEV air handler Diagnosis Corrective Actions EEV cased coil CAUTION Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
  • Page 70 TROUBLESHOOTING INDOOR UNIT FLOWCHART Error Code Indoor unit - outdoor unit, gas furnace or blower unit communication error (startup operation) 1 Applicable Models 5. Troubleshooting EEV air handler Diagnosis Corrective Actions EEV cased coil CAUTION Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.

  • Page 71: Troubleshooting

    TROUBLESHOOTING 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.) The integrated control module has some onboard tools that After any wiring changes have been made or DS1 dip...

  • Page 72: Thermistor Resistance & Temperature Characteristics

    THERMISTOR RESISTANCE & TEMPERATURE CHARACTERISTICS Tm : Coil Tl : Liquid Ts : Suction Td : Discharge Ta : Outdoor air Tb : Defrost (*) Tgi: Indoor Gas Tli: Indoor Liquid Thermistor Thermistor Thermistor TEMP TEMP Volts Volts Volts Resistance Resistance Resistance (°C)

  • Page 73: Pressure Vs Temperature Chart

    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 74.3 100.2 120.7 137.6 -34.7 38.7 74.9 100.7 121.0 137.9 -32.0 39.5 75.5 101.1 121.4 138.3 -29.4 40.5 76.1 101.6...

  • Page 74: Liquid Line Temperature Chart

    LIQUID LINE TEMPERATURE CHART Required Liquid Line Temperature REQUIRED SUBCOOLING TEMPERATURE (°F) LIQUID PRESSURE AT STOP VALVE (PSIG)

  • Page 75: Wiring Diagrams

    WIRING DIAGRAMS Outdoor AC 1.5 - 3.0 ton Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
  • Page 76 WIRING DIAGRAMS Outdoor AC 3.5 - 5.0 ton Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
  • Page 77 WIRING DIAGRAMS Outdoor HP 1.5 - 3.0 ton Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
  • Page 78 WIRING DIAGRAMS Outdoor HP 3.5 - 5.0 ton Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
  • Page 79 WIRING DIAGRAMS EEV air handler HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. 208/230 (SEE NOTE 4) GROUND LUG HEATER KIT (SEE NOTE 7) INTEGRATED CONTROL: COLOR CODES: BL - BLUE...
  • Page 80 WIRING DIAGRAMS EEV cased coil HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. ACC-IN ACC-OUT WIRING GROUND TO TB10 FIELD GROUND DATA SHARE PRESSURE SEG1 SEG2...

  • Page 81: Removal & Reassembly Procedure

    REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP & AC 1.5 to 3.0 ton models 1. Panels Step Procedure Points Remove 8 screws and ■ When reassembling, perform remove the right side the procedures in inverse panel. Right side panel order.
  • Page 82 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP & AC Step Procedure Points ■ When reassembling, insert the hook of the front panel into the slit of the partition plate. Partition plate Slit Hook Remove 4 screws and ■ The discharge grille screws remove the discharge are truss head tapping grille.
  • Page 83 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP & AC Step Procedure Points Cut the 2 clamps, ■ The 3 screws are pan head remove 3 screws and tapping screws. disconnect the external (a) 1 pc: M5 × 12 power supply, ground (b) 2 pc: M4 ×...
  • Page 84 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP & AC 2. Fan and Fan motor Step Procedure Points Remove the 1 screw ■ The screw is a truss head Drip proof plate and remove the drip tapping screw. proof cover. ■...
  • Page 85 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP & AC Step Procedure Points Remove the nut and ■ Nut size: M8 ■ 1.5/2.0 ton remove the fan. ■ 2.5/3.0 ton...
  • Page 86 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP & AC Step Procedure Points Remove 2 screws and ■ 1.5/2.0 ton remove the fan motor Fan motor stand stand. ■ 2.5/3.0 ton Fan motor stand Remove 4 screws and ■ The screws for fan motor ■...
  • Page 87 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP & AC Step Procedure Points ■ When reassembling follow Back view the instructions. Bend the claw of fan ■ For 2.5/3.0 ton models, be motor stand as shown. Fan motor sure to pass the fan motor Then fix the lead wire.
  • Page 88 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP only 3. Wiring (for HP models) Step Procedure Points Cut the 4 clamps and ■ When reassembling, fix Clamp disconnect the PS lead the lead wire to the same wire. position with new clamps to prevent malfunction.
  • Page 89 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP only Step Procedure Points Remove 2 screws and ■ Four way valve coil remove the solenoid Tightening torque: valve coil. 3.2±0.8 N·m (2.36±0.59 lb·ft) (M5 × 6.5). Remove 1 screw and remove the four way ■...
  • Page 90 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP only Step Procedure Points ■ 1.5/2.0/2.5 ton ■ 3.0 ton Outdoor coil thermistor Defrost thermistor Remove the suction ■ Cut the 2 clamps and pipe thermistor, remove the insulation tube. discharge pipe thermistor and liquid pipe thermistor.
  • Page 91 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton AC only 4. Wiring (for AC models) Step Procedure Points Cut the 4 clamps and ■ When reassembling, fix Clamp disconnect the PS lead the lead wire to the same wire. position with new clamps to prevent malfunction.
  • Page 92 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton AC only Step Procedure Points Remove the outdoor ■ When reassembling, fix the Outdoor air thermistor air thermistor and lead wires so that they do outdoor coil thermistor. not touch the edges. ■...
  • Page 93 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP & AC 5. Electrical box and PCB Step Procedure Points Remove 1 screw and Electrical box remove the electrical box. ■ The electrical box is fixed to Hook the tube plate by a hook. Tube plate Remove 2 screws and ■...
  • Page 94 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP & AC Step Procedure Points Disconnect the wires ■ When reassembling, be sure on climate talk board to curl the end of the lead (functional module), and fix the screw with the and then remove the following torque.
  • Page 95 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP & AC Step Procedure Points Remove 3 screws and ■ The screws of the electrical remove the electrical component box cover are component box cover. truss head tapping screws Electrical or truss head machine screw component box cover (M4 ×...
  • Page 96 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP only 6. Sound blankets and Compressor (for HP models) Step Procedure Points Remove 2 screws and ■ The upper screw is a truss remove the partition head tapping screw or a hex plate.
  • Page 97 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP only Step Procedure Points Remove the sound blanket (outer body). Sound blanket (outer body) Remove the sound ■ The illustration is for 2 ton blanket (inner top). model as representative. Sound blanket (inner top) Remove the sound...
  • Page 98 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP only Step Procedure Points Remove the terminal ■ The illustration is for 2 ton cover. model as representative. Terminal cover Disconnect the ■ The illustration is for 2 ton Protection bushing compressor lead wire.
  • Page 99 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP only Step Procedure Points Heat up the brazed ■ The illustration is for 2 ton parts of compressor model as representative. piping and disconnect them. ■ Before working, be sure to remove any putties, the Brazed part terminal cover, and other Putty...
  • Page 100 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton AC only 7. Sound blankets and Compressor (for AC models) Step Procedure Points Remove 2 screws and ■ The upper screw is a truss remove the partition head tapping screw or a hex plate.
  • Page 101 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton AC only Step Procedure Points Remove the sound blanket (outer body). Sound blanket (outer body) Remove the sound ■ The illustration is for 2 ton blanket (inner top). model as representative. Sound blanket (inner top) Remove the sound...
  • Page 102 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton AC only Step Procedure Points Remove the terminal ■ The illustration is for 2 ton cover. model as representative. Terminal cover Disconnect the ■ The illustration is for 2 ton Protection bushing compressor lead wire.
  • Page 103 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton AC only Step Procedure Points Heat up the brazed ■ The illustration is for 2 ton parts of compressor model as representative. piping and disconnect Brazed part them. ■ Before working, be sure to remove any putties, the terminal cover, and other Putty...

  • Page 104: Heat Exchanger

    REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP & AC 8. Heat exchanger Step Procedure Points Remove the suction Suction grille grille. Remove 1 screw. Remove 4 screws and remove the left side Left side plate plate. Heat up the brazed ■...

  • Page 105: 3.5 To 5.0 Ton Models

    REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton HP & AC 3.5 to 5.0 ton models 1. Panels Step Procedure Points Remove 3 screws and ■ When reassembling, perform remove the suction the procedures in inverse grille. order. ■ All screws that are not Suction grille mentioned are hexagon flanged screws (M5 ×...
  • Page 106 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton HP & AC Step Procedure Points Remove 1 screw and push down to remove the front panel (2). Front panel (2) Remove 8 screws Front panel (1) and remove the front panel (1). Back view...
  • Page 107 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton HP & AC Step Procedure Points Remove 4 screws and remove the discharge grille. Discharge grille Remove 1 screw and ■ The screw is a 3 class remove the shield hexagon head tapping plate of terminal board.
  • Page 108 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton HP & AC Step Procedure Points Remove 4 screws and remove the side cover. Side cover Remove 5 screws and ■ The screws marked with remove the right side circles are 3 class hexagon plate.
  • Page 109 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton HP & AC 2. Fan and Fan motor Step Procedure Points Disconnect the fan ■ When reassembling, note motor connector and the following points. release the lead wire from the hooks. Fan motor lead wire Fan motor connector (X108A)
  • Page 110 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton HP & AC Step Procedure Points Remove the nut and ■ Nut size: M8 remove the fan. Remove 2 screws and Fan motor stand remove the fan motor stand. Remove 4 screws and ■...
  • Page 111 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton HP only 3. Wiring (for HP models) Step Procedure Points Disconnect the PS PS connector (X17A) connector. Disconnect the compressor connectors and release the lead wires from the hooks. Compressor connector (U, V, W) Hook Remove the outdoor ■...
  • Page 112 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton HP only Step Procedure Points Remove the insulation ■ Cut the 2 clamps and tube and the suction remove the insulation tube. pipe thermistor. Suction pipe thermistor Clamp Suction pipe thermistor ■ When reassembling, the slit of the insulation tube must be positioned opposite to the suction pipe thermistor.
  • Page 113 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton HP only Step Procedure Points Remove the discharge pipe thermistor, liquid pipe thermistor and ground wire. Ground wire Liquid pipe Discharge pipe Detach the OL thermistor thermistor (overload protector) relay connector. OL lead wire OL relay connector...
  • Page 114 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton AC only 4. Wiring (for AC models) Step Procedure Points Disconnect the PS PS connector (X17A) connector. Disconnect the compressor connectors and Compressor release the lead wires connector (U, V, W) from the hooks. Hook Remove the outdoor ■...
  • Page 115 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton AC only Step Procedure Points Remove the insulation ■ Cut the 2 clamps and tube and the suction remove the insulation tube. pipe thermistor. Suction pipe thermistor Clamp Suction pipe thermistor ■ When reassembling, the slit of the insulation tube must be positioned opposite to the suction pipe thermistor.
  • Page 116 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton HP & AC 5. Electrical box and PCB Step Procedure Points Remove 2 screws and ■ The refrigerant cooling pipe remove the refrigerant screws are different from the cooling pipe jacket remaining screws. Do not cover.
  • Page 117 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton HP & AC Step Procedure Points Disconnect all the  HP models only Thermistors (X12A) Electronic expansion connectors on the valve coil (X21A)  main control board. Main control board HPS (X32A) OL (X33A) Four way valve coil...
  • Page 118 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton HP only 6. Sound blankets and Compressor (for HP models) Step Procedure Points Remove 6 screws and ■ The screws marked with a remove the stop valve circle is 3 class hexagon mounting plate.
  • Page 119 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton HP only Step Procedure Points Remove the terminal cover. Terminal cover Disconnect the ■ The wiring is different ■ 3.5/4.0 ton ■ 5.0 ton compressor lead wire. depending on the model. When reassembling, be sure to connect the lead wires as shown in the left.
  • Page 120 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton HP only Step Procedure Points Remove the OL. ■ When reassembling, attach the OL as shown below. (1) Insert lower hooks of retainer into the square holes of fixture. (2) Push upper hooks of retainer until they hook in the square holes of fixture.
  • Page 121 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton AC only 7. Sound blankets and Compressor (for AC models) Step Procedure Points Remove 6 screws and ■ The screws marked with a remove the stop valve circle is 3 class hexagon mounting plate.
  • Page 122 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton AC only Step Procedure Points Remove the terminal ■ The illustration is for 5.0 ton cover. model as representative. Terminal cover Disconnect the ■ The wiring is different ■ 3.5/4.0 ton ■ 5.0 ton compressor lead wire.
  • Page 123 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton AC only Step Procedure Points Remove the OL. ■ When reassembling, attach the OL as shown below. (1) Insert lower hooks of retainer into the square holes of fixture. (2) Push upper hooks of retainer until they hook in the square holes of fixture.
  • Page 124 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton HP only 8. Heat exchanger (for HP models) Step Procedure Points Remove 3 screws and ■ Before working, be sure remove the rear cover. to remove any putties, the terminal cover, and other Heat up the brazed plastic pieces that may burn.
  • Page 125 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton HP only Step Procedure Points For 4 screws model, remove 4 screws and remove the partition plate. Partition plate For 3 screws model, remove 3 screws and remove the partition plate. Partition plate ■...
  • Page 126 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton AC only 9. Heat exchanger (for AC models) Step Procedure Points Remove 3 screws and ■ Before working, be sure remove the rear cover. to remove any putties, the terminal cover, and other Heat up the brazed plastic pieces that may burn.
  • Page 127 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton AC only Step Procedure Points For 4 screws model, remove 4 screws and remove the partition plate. Partition plate For 3 screws model, remove 3 screws and remove the partition plate. Partition plate ■...

  • Page 128: D-Checker Addendum

    D-CHECKER ADDENDUM The Daikin D-Checker software is used for monitoring or recording operation data of ▪ inverter using a connection cable exclusive to D-Checker. Please use correctly by carefully reading the instruction manual. This software can monitor inverter sensor data (temperature, pressure) and actuator status ▪...
  • Page 129 D-CHECKER ADDENDUM D-Checker Cable Connects to Plug X41A on both Boards Small Chassis 1.5-3.0 Ton Models Large Chassis 3.5-4.0 Ton Models ▪ ▪ COM Port Verification Open the device manager software in your laptop. ▪ Connect the USB plug of the D-Checker cable into your laptop, and the terminal plug end into X41A ▪...
  • Page 130 D-CHECKER ADDENDUM View System Operation Click Recording (F1) At least customer id must be entered. Select Add new (F3) Select OK (F1)when complete Click Select (F2) when desired customer is selected and then “New” Click Auto select (F2) Note: D-checker will Not communicate with a system in sleep mode or hibernate.
  • Page 131 D-CHECKER ADDENDUM Select correct COM port, then press OK (F1) Either incorrect COM port selected or system is in sleep mode When detection method completes a system name will populate Click OK (F1) One icon per piece One icon per piece of equipment of equipment...
  • Page 132 D-CHECKER ADDENDUM Recording Operation Data Click OK (F1) If Recording is required, Time recorded will populate click Start Rec. (F6) Select Graph View (F2) Selected data points from Op. Selected data (F4) 3 Analog scales to choose from on Graph 100, 1000, 10000 Selected Binary data points Reflects how selected data points are scaled...
  • Page 133 D-CHECKER ADDENDUM Change label name in editor tab (F5) Click OK (F1) When finished Recording, select Stop Rec. (F8) Playback and Exporting Data Select Play (F2) Select desired recording Add new folder to desktop with jobsite name Select CSV output (F2) Click Open then Save...
  • Page 134 D-CHECKER ADDENDUM Analyzing Data: Verify Target Discharge Temp ▪ matches with actual system discharge temp. Note: It may take 20 mins for software to calculate target. Verify System protections are ▪ activated: 255 means inactive. If protection is active, this does not automatically indicate a problem.

  • Page 135: Revision History

    REVISION HISTORY Month / Year Version Revised contents 06 / 2022 SiUS612209E First edition 09 / 2022 SiUS612209EA Correction of error code E41...
  • Page 136 Daikin Texas Technology Park, 19001 Kermier Road, Waller, TX, 77484, U.S.A. NOTE: SPECIFICATIONS AND PERFORMANCE DATA LISTED HEREIN ARE SUBJECT TO CHANGE WITHOUT NOTICE Visit our website at www.daikincomfort.com for information on: • Products • Parts • Warranties • Contractor Programs and Training •...

This manual is also suitable for:

Dz6vs 1 a seriesDv fec seriesDfve eev seriesCape(a) seriesChpe eev series

Table of Contents