Daikin DX17VSS B Series Service Instructions Manual
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Daikin DX17VSS B Series Service Instructions Manual

Inverter outdoor units with r-410a refrigerant
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SiUS612102E
Service Instructions
DX17VSS***B* / DZ17VSA***B* Inverter Outdoor Units
with R-410A Refrigerant
Coils, Air Handler & Accessories
WARNING
Only personnel that have been trained to install, adjust, service
or repair(hereinafter, "service") the equipment specified in this
PROP 65 WARNING
manual should service the equipment. The manufacturer will not
FOR CALIFORNIA CONSUMERS
be responsible for any injury or property damage arising from
improper service or service procedures. If you service this unit,
WARNING
you assume responsibility for any injury or property damage
which may result. In addition, in jurisdictions that require one or
more licenses to service the equipment specified in this manual,
Cancer and Reproductive Harm -
only licensed personnel should servise the equipment.
www.P65Warnings.ca.gov
Improper installation, adjustment, servicing or repair of the
0140M00517-A
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.
© 2021

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  • Page 1 SiUS612102E Service Instructions DX17VSS***B* / DZ17VSA***B* Inverter Outdoor Units with R-410A Refrigerant Coils, Air Handler & Accessories WARNING Only personnel that have been trained to install, adjust, service or repair(hereinafter, “service”) the equipment specified in this PROP 65 WARNING manual should service the equipment. The manufacturer will not FOR CALIFORNIA CONSUMERS be responsible for any injury or property damage arising from improper service or service procedures.

  • Page 2: Table Of Contents

    3.5 to 5.0 ton models............91 - 113 product. For further assistance, please contact: d-CHECkER AddEndUM..........114 - 120 CONSUMER INFORMATION LINE - DAIKIN BRAND PRODUCTS TOLL FREE 1-855-770-5678 (U.S. only) email us at: customerservice@daikincomfort.com fax us at: (713) 856-1821 (Not a technical assistance line for dealers.)

  • 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: Product Identification

    A - All * * NOTE: Not all feature sets / compressors available at initial launch of product NOMENCLATURE FOR INDOOR UNIT(AIR HANDLER) Brand Engineering D - Daikin Single-Piece Major/Minor Revisions Air Handler Unit Application Refrigerant V - Multi Position Variable-Speed...
  • Page 5 product identification NOMENCLATURES FOR INDOOR UNIT (CASED COIL) Product Category Engineering C - Indoor Coil Major/Minor Revisions Refrigerant Application 4 - R-410A A - Upflow/Downflow H - Horizontal A Coil Nominal Width for Gas Furnace S - Horizontal Slab Coil B - Fits 17½"...

  • Page 6: Testing Capacitor Resistance

    TESTING CAPACITOR RESISTANCE WARNING A���� ������� ���� ��� ������� ����. •N���� ����� ��� ������� ���� ������ ���������� ���� ��� �������� ������� �� 50 ����� �� ����. 1. S��� ���� ��� ����� ��� ����� ��� ������� ��� ��� 10 �������. 2. M��� ���� �� ����� ��� E���� ������ �������� �� ������� ��� ������ ����������� ���� ���� ���� (�� ������� �������...
  • Page 7 TESTING CAPACITOR RESISTANCE 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 8: System Operation

    / dZ17vSA R-410A model units use a daikin ro- compressor speed than required from thermostat to recover tary compressor.
  • Page 9 SYSTEM OPERATION PIPING DIAGRAMS AC 1.5 -3.0 ton AC 3.5 -5.0 ton...
  • Page 10 SYSTEM OPERATION HP 1.5 -3.0 ton HP 3.5 -5.0 ton...
  • Page 11 SYSTEM OPERATION COOLING OPERATION FLOW...
  • Page 12 SYSTEM OPERATION HEATING OPERATION FLOW...

  • Page 13: Cooling Analysis Chart

    COOLING ANALYSIS CHART...

  • Page 14: Heating Analysis Chart

    HEATING ANALYSIS CHART...

  • Page 15: Servicing

    CHECkinG WiRinG ........16 S-17A RESiStAnCE tESt ........24 S-3A tHERMoStAt And WiRinG ......16 S-17B GRoUnd tESt ..........24 S-3E dAikin CoMMUniCAtinG tHERMoStAt ... 16 S-26 tEStinG tHERMiStoR, EEv CoiL And SoLEnoid vALvE CoiL RESiStAnCE ..24 CHECkinG tRAnSfoRMER And ContRoL CiRCUit ............

  • Page 16: Checking Voltage

    Min. Max. <In Case of Air Handler> Outdoor Unit, Air Handler (DV*FEC), 208/230 Communica�ng Thermostat Modular Blower, Heater Kit (In case of Daikin One+ Gas Furnaces Smart Thermostat) 125 �. (*) Cased Coil (CAPE(A)*/CHPE*) 22.6 25.5 Air Handler Blower...

  • Page 17: 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 ISCONNECT POWER BEFORE SERVICING OR INSTALLING ULTIPLE POWER SOURCES MAY BE INSTALLING ULTIPLE POWER SOURCES MAY BE PRESENT AILURE TO DO SO MAY CAUSE PROPERTY PRESENT...

  • Page 18: Checking Indoor Unit / Outdoor Unit

    SERVICING S-13 CHECKING INDOOR UNIT / OUTDOOR 1.0. AIRFLOW CONSIDERATION UNIT PRESSURE SENSOR Airflow demands are managed differently in a fully commu- With power on: nicating system than in a non-communicating wired system. the system operating mode (as determined by the thermo- WARNING stat) determines which unit calculates the system airflow demand.

  • Page 19: Airflow Trim Setting Limitation

    Setting with communicating thermostat: indoor unit dZ17vSA361* d*96vC0403B* for a detailed procedure of thermostat heater kit capacity selection process, please visit the daikin one+ Smart ther- d*96vC0603B* mostat website at https://www.daikinone.com Cool Airflow Trim High d*80vC0603B* Heat Airflow Trim High...

  • Page 20: S-61A Checking Heater Limit Control(S)

    SERVICING Setting with DIP Switch: HEATER KIT NOMINAL kW in the event of loss of communication, emergency mode 19/20 can be activated. in emergency mode operation, heater kit selection will be driven by the diP switch (S9, S10, S11 and 1000 S12) selection from the control board on indoor unit.

  • Page 21: S-61B Checking Heater Fuse Link

    SERVICING S-61B CHECKING HEATER FUSE LINK (OP- 8. Check motor mounting bracket. Ensure mounting bracket is tightly secured to the housing. Ensure TIONAL ELECTRIC HEATERS) bracket is not cracked or broken. Each individual heater element is protected with a one time Emerson UltraCheck-EZ™...
  • Page 22 SERVICING 9. Depress the orange power button to turn off motor. Electrical Checks - Low Voltage Control Circuits 1. turn on power to the indoor unit. 10. disconnect power. disconnect diagnostic tool. 11. Reconnect the 4-wire harness from control board to motor.

  • Page 23: Checking Compressor

    SERVICING S-17 CHECKING COMPRESSOR WARNING Hermetic compressor electrical terminal venting can be dangerous. When insulating material which supports a hermetic compressor or electrical terminal suddenly disintegrates due to physical abuse or as a result of an electrical short between the terminal and the compressor housing, the terminal may be expelled, venting the vapor and liquid contents of the compressor housing and system.

  • Page 24: S-17A Resistance Test

    SERVICING S-17A RESISTANCE TEST S-17B GROUND TEST inverter on the outdoor unit control board takes the position if fuse, circuit breaker, etc., has tripped, this is a strong in- signal from the UvW line connected with the compressor. dication that an electrical problem exists and must be found When the system detects the malfunction on the compres- and corrected.

  • Page 25: Refrigeration Repair Practice

    SERVICING S-100 REFRIGERATION REPAIR PRACTICE to check these thermistors: DANGER HIGH VOLTAGE! Always remove the refrigerant charge in a proper Disconnect ALL power before servicing manner before applying heat to the system. or installing. Multiple power sources may be present. Failure to do so may NOTICE cause property damage, personal injury or death.

  • Page 26: Leak Testing (Nitrogen Or Nitrogen-Traced)

    SERVICING S-101 LEAK TESTING (NITROGEN OR NITRO- S-102 EVACUATION GEN-TRACED) WARNING WARNING REFRIGERANT UNDER PRESSURE! Failure to follow proper procedures may cause To avoid the risk of fire or explosion, never use property damage, personal injury or death. oxygen, high pressure air or flammable gases for leak testing of a refrigeration system.
  • Page 27 SERVICING Stop Valve Operation Method R-410A MANIFOLD LOW SIDE HIGH SIDE CAUTION GAUGE GAUGE AND VALVE AND VALVE • BE SURE TO OPEN THE STOP VALVE. • INADEQUATE TORQUE MAY CAUSE LEAKAGE OF REFRIGERANT. 800 PSI RATED HOSES Opening Procedure CHARGING CYLINDER 1.

  • Page 28: Charging

    SERVICING S-103 CHARGING Service port WARNING Back sealing REFRIGERANT UNDER PRESSURE! *To be sealed, * Do not overcharge system with refrigerant. follow step 3 of * Do not operate unit in a vacuum or at negative Opening Procedure. pressure. Failure to follow proper procedures may cause Valve lid property damage, personal injury or death.

  • Page 29: Checking Compressor Efficiency

    SERVICING S-104 CHECKING COMPRESSOR EFFICIENCY S-114 NON-CONDENSABLE the reason for compressor inefficiency is that the compres- if non-condensable is suspected, shut down the system sor is broken or damaged, reducing the ability of the com- and allow the pressures to equalize. Wait at least 15 min- pressor to pump refrigerant vapor.

  • Page 30: Duct Static Pressures And/Or Static Pressure Drop Across Coils

    SERVICING S-202 DUCT STATIC PRESSURES AND/OR STATIC Supply Duct 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 Supply Sta�c (CfM) versus static pressure drop across the coil.

  • Page 31: S-203A Two Piece Indoor Unit External

    SERVICING S-203A TWO PIECE INDOOR UNIT EXTERNAL Supply Duct STATIC two piece indoor unit refers to CAPE(A)/CHPE 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 Cased Coil (inclined Manometer or Magnehelic gauge) to measure (CAPE(A)/CHPE)

  • Page 32: Troubleshooting-Indoor Unit

    SERVICING TROUBLESHOOTING-INDOOR UNIT FOR DV*FEC/CAPE(A)*/CHPE* 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 AUX ALARM (Only for DV*FEC ) ACC-OUT (Accessory) ACC-IN (Accessory) (Only for DV*FEC )
  • Page 33 SERVICING Troubleshooting Troubleshooting Electrostatic Discharge (ESD) Precautions Electrostatic Discharge (ESD) Precautions NOTE: discharge body's static electricity before touching NOTE: discharge body's static electricity before touching unit. Electrostatics can adversely affect electrical compo- unit. Electrostatics can adversely affect electrical compo- nents. nents.

  • Page 34: Fault Recall

    SERVICING FAULT RECALL 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 six faults on the 7 segment LEd display.

  • Page 35: 2-Digit 7 Segment Displays

    SERVICING 2-DIGIT 7 SEGMENT DISPLAYS (DV*FEC/CAPE(A)*/CHPE*) 7 Segment LED Description of Condition Display(State) (no display) intERnAL ContRoL fAULt / no PoWER StAndBy, noRMAL ModE fC * CooLinG ModE fH * HEAt PUMP HEAtinG ModE When the indoor unit is energized power supply, 2-digit _f * fAn onLy 7 segment displays on control board show current...
  • Page 36 SERVICING 2-DIGIT 7 SEGMENT DISPLAYS (DV*FEC/CAPE(A)*/CHPE*) 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 37: Setting The Mode Display

    SERVICING SETTING THE MODE DISPLAY (DV*FEC/CAPE(A)*/CHPE*) 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 cased coil. Follow the informa�on provided in this sec�on to learn how to use the mode display.
  • Page 38 SERVICING SETTING THE MODE DISPLAY (DV*FEC/CAPE(A)*/CHPE*) <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 39: Indoor Unit Error Codes

    SERVICING INDOOR UNIT ERROR CODES (DV*FEC/CAPE(A)*/CHPE*) TROUBLESHOOTING...
  • Page 40 SERVICING INDOOR UNIT ERROR CODES (DV*FEC/CAPE(A)*/CHPE*) TROUBLESHOOTING...

  • Page 41: Emergency Mode

    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 CASED COIL (CAPE(A), CHPE)
  • Page 42 SERVICING FOR AIR HANDLER (DV*FEC) control board this mode will run the electric heat strips independently of (inside) any thermostat in one of two modes: High Heat Level or Low Heat Level. 1) dip Switch Bank dS-6 (specifically dipswitches S-21 and S-22) on the indoor unit control board is used to engage emergency heating mode.
  • Page 43 SERVICING For CASED COIL (CAPE(A), CHPE) For AIR HANDLER (DV*FEC) 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 (CAPE(A)*/ enable emergency indoor airflow operation (using dip CHPE*, Gas furnace/Modular Blower, outdoor unit...
  • Page 44 SERVICING Switch Bank DS-4 Switch Bank DS-6 Indoor Unit (DV*FEC) Fan Settings Indoor Unit (DV*FEC/CAPE(A)*/CHPE*) 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 *1.
  • Page 45 SETTING THE MODE DISPLAY MODE DISPLAY INTRODUCTION A 3-digit display is provided on the control board as a backup tool to the thermostat for reading faults, fault history, monitoring and setting up the 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 46: Setting The Mode Display

    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 47 SETTING THE MODE DISPLAY FAULT CODE HISTORY NAVIGATION < SCREEN 1 > this mode will allow the user to see the six most recent system faults. for a list of the fault codes, please see the tRoUBLESHootinG tables in this document. <...
  • Page 48 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 49 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 50 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 51: 7-Segment Display

    7-SEGMENT DISPLAY SCREEN 0 (Display FAULT CODE) Setting Contents Notes fault code (present) SCREEN 1 (Display FAULT CODES) Setting Contents Notes fault code (latest) Latest fault code (2nd) fault code (3rd) fault code (4th) fault code (5th) fault code (6th) SCREEN 2 (MONITOR MODE) Setting Contents...
  • Page 52 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 53 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. 0:Same Level vertical Rise 1:Outdoor Lower 2:indoor Lower System Verification Test 0:on 1:OFF (System test) force defrost Cycle 0:on 1:OFF...

  • Page 54: 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 55 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 56 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 57 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 58 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 59: 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 60: 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 61: Liquid Line Temperature Chart

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

  • Page 62: Wiring Diagrams

    WIRING DIAGRAMs 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 63 WIRING DIAGRAMs 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 64 WIRING DIAGRAMs 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 65 WIRING DIAGRAMs 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 66 WIRING DIAGRAMs DV*FEC NOTE: tHESE inStRUCtionS ARE SPECifiCALLy foR dv*fEC ModELS. do NOT AttEMPt to APPLy tHESE diAGRAMS to Any otHER ModELS. 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.
  • Page 67 WIRING DIAGRAMs CAPE(A)*/CHPE* NOTE: tHESE inStRUCtionS ARE SPECifiCALLy foR CAPE(A)*/CHPE* ModELS. do NOT AttEMPt to APPLy tHESE diAGRAMS to Any otHER ModELS. 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.

  • Page 68: 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. order. ■ All screws that are not mentioned are hexagon flanged screws (M4 ×...
  • Page 69 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. Slit Hook Remove 4 screws and ■ The discharge grille screws remove the discharge are truss head tapping grille.
  • Page 70 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP & AC Step Procedure Points Cut the 2 clamps, ■ The 3 screws marked in a remove 3 screws and circle are pan head tapping disconnect the external screws. power supply, ground •...
  • Page 71 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP & AC 2. Fan and Fan motor Step Procedure Points Remove the drip proof cover. disconnect the fan ■ When reassembling, pass motor lead wire. the fan motor lead wire firmly through the hole in the resin electrical component box.
  • Page 72 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP & AC Step Procedure Points Remove 2 screws and remove the fan motor stand. Remove 4 screws and ■ The screws for fan motor remove the fan motor. are hexagon head tapping screws (M5 ×...
  • Page 73 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP & AC Step Procedure Points The slack of fan motor lead wire Clamp on fan motor lead wire should be kept in is inside the electrical box. this position. No slack Fan motor lead wire motor Set fan motor...
  • Page 74 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP only 3. Wiring (for HP models) Step Procedure Points Cut the 2 clamps and ■ All clamps that are cut disconnect the PS and should be returned to the electronic expansion same position (with new connector valve coil lead wires.
  • Page 75 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 ft-lbf) (M5 × 6.5). Remove 1 screw and remove the four way ■...
  • Page 76 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP only Step Procedure Points ■ For 1.5 - 2.5 ton models ■ For 3.0 ton model Outdoor heat exchanger middle thermistor Defrost thermistor Remove the suction ■ Cut the 2 clamps and pipe thermistor, remove the insulation tube.
  • Page 77 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton AC only 4. Wiring (for AC models) Step Procedure Points Cut the 1 clamp and ■ All clamps that are cut disconnect the PS lead should be returned to the wire. same position (with new connector After maintenance, clamps) to retie the wires...
  • Page 78 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton AC only Step Procedure Points ■ For 1.5 - 2.5 ton models ■ For 3.0 ton model Outdoor heat exchanger middle thermistor Remove the suction ■ Cut the 2 clamps and pipe thermistor, remove the insulation tube.
  • Page 79 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP & AC 5. Electrical box and PCB Step Procedure Points Remove 1 screw and remove the electrical box. ■ The electrical box is fixed to the tube plate by a hook. Hook Remove 3 screws and ■...
  • Page 80 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP & AC Step Procedure Points disconnect the wires on the sub control board, and then remove the sub control board. Sub control board disconnect all the connectors on the main control board. Main control board...
  • Page 81 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP & AC Step Procedure Points Remove 3 screws and ■ The mounting plate screws remove the mounting are truss head tapping plate for terminal screws. block. • Upper screw: M4 × 12 •...
  • Page 82 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP & AC 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 (M4 × plate.
  • Page 83 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP only Step Procedure Points Remove the sound ■ For 1.5 - 2.0 ton models, blanket (outer body). Anti-vibration rubber return the anti-vibration and wire spring rubber and wire spring to the same position after maintenance if they are removed during maintenance.
  • Page 84 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP only Step Procedure Points Remove the sound ■ The illustration is for 3 ton blanket (inner body). model as representative. Sound blanket (inner body) Remove the terminal ■ The illustration is for 3 ton cover.
  • Page 85 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton HP only Step Procedure Points Remove the oL. ■ When reassembling, attach the oL as shown below. (1) Peel off the paper of retainer assy. (2) insert lower hooks of retainer into the square holes of fixture.
  • Page 86 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 (M4 × plate.
  • Page 87 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton AC only Step Procedure Points Remove the sound ■ For 1.5 - 2.0 ton models, blanket (outer body). return the anti-vibration rubbers and wire springs Anti-vibration to the same position rubbers and wire springs after maintenance if they are removed during...
  • Page 88 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton AC only Step Procedure Points Remove the sound ■ The illustration is for 3 ton blanket (inner body). model as representative. Sound blanket (inner body) Remove the terminal ■ The illustration is for 3 ton cover.
  • Page 89 REMOVAL & REASSEMBLY PROCEDURE 1.5 to 3.0 ton AC only Step Procedure Points Remove the oL. ■ When reassembling, refer to the note of HP model no.8. Heat up the brazed ■ The illustration is for 3 ton parts of compressor model as representative.
  • Page 90 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 91: 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 mentioned are hexagon flanged screws (M5 ×...
  • Page 92 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). Remove 8 screws and remove the front panel (1). Back view...
  • Page 93 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton HP & AC Step Procedure Points Remove 4 screws and remove the discharge grille. Remove 1 screw and ■ The screw is a 3 class remove the shield hexagon head tapping plate of terminal board. screw.
  • Page 94 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton HP & AC Step Procedure Points Remove 4 screws and remove the side cover. Remove 5 screws and ■ The screws marked with remove the right side circles are 3 class hexagon plate.
  • Page 95 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 Hook...
  • Page 96 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 remove the fan motor stand. Remove 4 screws and ■ The screws for fan motor remove the fan motor.
  • Page 97 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton HP only 3. Wiring (for HP models) Step Procedure Points disconnect the PS PS connector connector. disconnect the compressor connectors and release the lead wires from the hooks. Compressor connector Hook Remove the outdoor air ■...
  • Page 98 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 thermistor Clamp ■ When reassembling, the slit of the insulation tube must be positioned opposite to the suction pipe thermistor.
  • Page 99 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 thermistor detach the oL thermistor (overload protector) relay connector. OL lead wire OL relay connector...
  • Page 100 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton AC only 4. Wiring (for AC models) Step Procedure Points disconnect the PS PS connector connector. disconnect the compressor connectors and Compressor release the lead wires connector from the hooks. Hook Remove the outdoor air ■...
  • Page 101 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 thermistor Clamp ■ When reassembling, the slit of the insulation tube must be positioned opposite to the suction pipe thermistor.
  • Page 102 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 103 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton HP & AC Step Procedure Points disconnect all the Thermistors Electronic expansion valve coil connectors on the main control board. Main control board Four way valve coil Solenoid valve coil Power supply Ground Remove 11 screws and remove the main...
  • Page 104 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 105 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 compressor lead wire. depending on the model. When reassembling, be sure to connect the lead wires as shown in the left.
  • Page 106 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) Peel off the paper of retainer assy. (2) insert lower hooks of retainer into the square holes of fixture.
  • Page 107 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 108 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 compressor lead wire. depending on the model. When reassembling, be sure to connect the lead wires as shown in the left.
  • Page 109 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton AC only Step Procedure Points Remove the oL. ■ When reassembling, refer to the note of HP model no.6. Heat up the brazed ■ Before working, be sure parts of compressor to remove any putties, the piping and disconnect terminal cover, and other plastic pieces that may burn.
  • Page 110 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 111 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton HP only Step Procedure Points Remove 4 screws and remove the partition plate. Partition plate...
  • Page 112 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 113 REMOVAL & REASSEMBLY PROCEDURE 3.5 to 5.0 ton AC only Step Procedure Points Remove 4 screws and remove the partition plate. Partition plate...

  • Page 114: 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 115 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 116 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 117 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 118 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 119 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 120 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 121 REVISION HISTORY Month / Year Version Revised contents 02 / 2021 SiUS612102E first edition...
  • Page 122 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 •...

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