Daikin SKYAIR Service Manual
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Daikin SKYAIR Service Manual

Inverter single split
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R410A
SERVICE MANUAL
SKYAIR Inverter Single Split
SM-5CKY/CCY/CEY-EU-A1

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Summary of Contents for Daikin SKYAIR

  • Page 1 R410A SERVICE MANUAL SKYAIR Inverter Single Split SM-5CKY/CCY/CEY-EU-A1...

  • Page 2: Table Of Contents

    Table of Contents Table of Contents 1.0 Inverter Skyair.......................1 1.1 Safety Cautions .......................1 1.2 Product Line-Up .......................5 1.3 Printed Circuit Board (PCB) Connector Wiring Diagram .........7 1.3.1 Main Board ........................7 1.3.2 Fan Motor Board ......................9 1.3.3 Signal Receiver Board ....................10 1.3.4 Signal Display Board ....................

  • Page 4: Inverter Skyair

    Inverter Single Split Inverter Skyair 1.1 Safety Cautions Cautions and Warnings • Be sure to read the following safety cautions before conducting repair work. • The caution items are classifi ed into “ Warning” and “ Caution”. The “ Warning” items are especially important since they can lead to death or serious injury if they are not followed closely.
  • Page 5 Inverter Single Split Caution Do not repair the electrical components with wet hands. Working on the equipment with wet hands can cause an electrical shock. Do not clean the air conditioner by splashing water. Washing the unit with water can cause an electrical shock. Be sure to provide the grounding when repairing the equipment in a humid or wet place, to avoid electrical shocks.

  • Page 6: Cautions Regarding Products After Repair

    Inverter Single Split Cautions Regarding Products after Repair Warning Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work. Never attempt to modify the equipment. The use of inappropriate parts or tools can cause an electrical shock, excessive heat generation or fi...

  • Page 7: Inspection After Repair

    Inverter Single Split Caution Installation of a leakage breaker is necessary in some cases depending on the conditions of the installation site, to prevent electrical shocks. Do not install the equipment in a place where there is a possibility of combustible gas leaks.

  • Page 8: Product Line-Up

    Inverter Single Split 1.2 Product Line-Up Classifi cation Nomenclature AHQ71AV1 AHQ100AV1 AHQ125AV1 AHQ140AV1 ABQ71AV1 ABQ100AV1 ABQ125AV1 ABQ140AV1 ACQ71AV1 ACQ100AV1 ACQ125AV1 ABQ71BV1 ACQ71BV1 ACQ100BV1 ACQ125BV1 AHQ71CV1 AHQ100CV1 AHQ125CV1 AHQ140CV1 ACQ71CV1 ACQ100CV1 ACQ125CV1 ABQ71CV1 ABQ100CV1 ABQ125CV1 ABQ140CV1 Remark: AHQ: Ceiling Mounted unit ACQ: Ceiling Cassette unit ABQ: Ceiling Concealed unit...

  • Page 9: Printed Circuit Board (Pcb) Connector Wiring Diagram

    Inverter Single Split 1.3 Printed Circuit Board (PCB) Connector Wiring Diagram 1.3.1 Main Board 1.3.1.1 Main Board (AC fan motor) Indoor: AHQ_AV1, ABQ_AV1 and ACQ_AV1 Item Indication on PCB Description Fuse Varistor Connector to Wired Panel Connector to AC Twin Fan Signal Connector to Float Switch Connector to Display and IR Receiver board Connector to Swing motor...
  • Page 10 Inverter Single Split 1.3.1.2 Main Board (DC fan motor) Indoor: AHQ_CV1, ABQ_CV1 and ACQ_CV1 Item Indication on PCB Description Connector to DC Bus 1 Connector to Wired Panel Varistor Fuse Connector to Float Switch Connector to Display and IR Receiver board Connector to Swing motor Connector to Room Sensor Connector to Indoor Coil Sensor...

  • Page 11: Fan Motor Board

    Inverter Single Split 1.3.2 Fan Motor Board 1.3.2.1 AC Fan motor Board Item Indication on PCB Description Connector to AC Twin Fan Signal 1.3.2.2 DC Fan motor Board Item Indication on PCB Description Connector to DC Fan 2 Connector to DC Bus Power 3 Connector to DC Bus Power 4 Connector to DC Twin Fan Signal...

  • Page 12: Signal Receiver Board

    Inverter Single Split 1.3.3 Signal Receiver Board 1.3.3.1 ACQ71/100/125/140 (common for all models) Item Indication on PCB Description IR Receiver Operation LED Timer LED Sleep LED Display connector Emergency switch 1.3.3.2 AHQ71/100/125 (common for all models) Item Indication on PCB Description IR Receiver Receiver connector...

  • Page 13: Signal Display Board

    Inverter Single Split 1.3.3.3 AHQ140 (common for all models) Item Indication on PCB Description Receiver connector IR Receiver 1.3.4 Signal Display Board 1.3.4.1 AHQ71/100/125 (common for all models) Item Indication on PCB Description Emergency switch Sleep LED Timer LED Operation LED Display connector 1.3.4.2 AHQ140 (common for all models) Item...

  • Page 14: Wired Extension Board

    Inverter Single Split 1.3.5 Wired Extension Board 1.3.5.1 AHQ140 (common for all models) Item Indication on PCB Description Connector to Control PCB Wired panel connector...

  • Page 15: Function & Control

    Function & Control 2.0 Function & Control 2.1 Temperature Control Temperature detected by room temperature thermistor (either on the unit or on wired panel). Set temperature is selected by user using wireless handset or wired handset. Target temperature Room thermistor temperature Set temperature Room temperature 2.2 Cooling and Heating Mode Operation...

  • Page 16: Air Flow Direction Control

    Function & Control 2.2.2 Heating Mode: When Ts > Tr - 1.0°C • Compressor, Indoor Fan and Outdoor Fan ON. When Ts ≤ Tr - 1.5°C • Compressor and Outdoor Fan OFF. • Indoor Fan off if indoor coil ≤ 20°C. Tr = Room Temperature Ts = Set Temperature When heating load is too small, and the room temperature still rising above compressor cut off point,...

  • Page 17: On/Off Function On Indoor Unit

    Function & Control 2.7 ON/OFF Function on Indoor Unit ON/OFF button on the Indoor unit can be use to trigger the unit to ON or OFF. When the button is pressed, the system mode setting will rotate in the following sequence, OFF ->...

  • Page 18: Service Diagnosis

    Service Diagnosis 3.0 Service Diagnosis 3.1 Error Indication from Indoor When any error occurs, indoor LED display will keep blinking (green light). The blinking pattern does not indicate error details. Table below shows the meaning of different pattern of indication light. Indicator Light Operation / Faulty Indication SLEEP...

  • Page 19: Error Code Retrieved By Wireless Handset

    Service Diagnosis 3.2 Error Code Retrieved by Wireless Handset Mode button ON/OFF button ON TIMER CANCEL OFF TIMER button CANCEL button Operating Guide 1. Hold down ON TIMER CANCEL or OFF TIMER CANCEL for 5 seconds until “ ” indication fl ashes on the handset temperature display section.

  • Page 20: Last State Error Retrieved By Wireless Handset

    Service Diagnosis 3.3 Last State Error Retrieved by Wireless Handset Operating Guide 1. Remove battery from remote controller. 2. Replace battery again into remote controller. 3. Press Mode & ON/OFF buttons together. 4. The “ ” will show at temperature section. 5.

  • Page 21: Error Code Description For Inverter

    Service Diagnosis 3.5 Error Code Description for Inverter ERROR CODE ERROR DESCRIPTION NORMAL INDOOR PCB ABNORMALITY DRAIN PUMP ABNORMALITY ANTIFREEZE PROTECTION/HIGH PRESSURE CONTROL INDOOR FAN MOTOR ABNORMALITY INDOOR HEAT EXCHANGER THERMISTOR ABNORMALITY INDOOR ROOM THERMISTOR ABNORMALITY HEAT EXCHANGER OVERHEAT INSUFFICIENT GAS COMMUNICATION ABNORMALITY INSTALLATION ERROR Note:...
  • Page 22 Service Diagnosis Description Drain Pump Abnormality Supposed Cause 1. Malfunctioning drain pump. 2. Improper drain piping work. 3. Drain piping clogging. 4. Malfunctioning fl oat switch. 5. Malfunctioning indoor unit PC board. Troubleshooting Begin Is a drain Connect the pump connected to drain pump.
  • Page 23 Service Diagnosis Description Anti-freeze protection or High Pressure Control Supposed Cause 1. Indoor air fi lter, heat exchanger block due to dust accumulation. 2. Indoor air short circuit. 3. Indoor coil thermistor faulty. 4. Indoor PCB faulty. 5. Fan blower dirty. Troubleshooting Check indoor air flow.
  • Page 24 Service Diagnosis Description Indoor Fan Motor Abnormality Supposed Cause 1. Indoor fan motor winding short, or the motor lead wire broken. 2. Indoor PCB faulty. Troubleshooting Turn off power supply and rotate fan by hand. Change fan motor. Does it rotate? Check fan motor connector condition.
  • Page 25 Refer to Appendix A for thermistor resistance checking procedures (Item 1, page 32). Refer to Appendix A for Inverter unit refrigerant check procedures (Item 2, page 33). Refer to Appendix A for Installation condition check (Item 3, page 33). For electronic expansion device checking procedures, please refer to Daikin procedures.
  • Page 26 Repair the leak point. Change outdoor PCB. Any leakage? Add in refrigerant charge. *Remark: Refer to Appendix A for thermistor resistance checking procedures (Item 1, page 32). For electronic expansion device checking procedures, please refer to Daikin Procedures.
  • Page 27 Service Diagnosis Description Communication Abnormality Supposed Cause 1. Faulty outdoor unit PCB. 2. Faulty indoor unit PCB. 3. Indoor unit – outdoor unit signal transmission error due to wiring error. 4. Indoor unit – outdoor unit signal transmission error due to disturbed power supply waveform. 5.
  • Page 28 Service Diagnosis Description Installation error Supposed Cause 1. Wrong models interconnected. 2. Wrong indoor unit PCB mounted. 3. Indoor unit PCB defective. 4. Wrong outdoor unit PCB mounted or defective. Troubleshooting Check the combination of the indoor and outdoor unit. Match the compatible models.

  • Page 29: Wiring Diagram

    Wiring Diagram Wiring Diagram Model: ABQ71/100/125/140AV1 Model: ACQ71/100/125AV1...
  • Page 30 Wiring Diagram Model: AHQ71AV1 Model: AHQ100/125AV1...
  • Page 31 Wiring Diagram Model: AHQ140AV1 Model: ABQ140BV1...
  • Page 32 Wiring Diagram Model: ACQ100/125BV1 Model: ABQ71/100CV1...
  • Page 33 Wiring Diagram Model: ABQ125/140CV1 Model: ACQ71/100/125CV1...
  • Page 34 Wiring Diagram Model: AHQ71/100/125CV1 Model: AHQ140CV1...

  • Page 35: Appendix A

    Remove the connectors of thermistors at PCB and measure resistance of each thermistor using tester as shown below. Tester Resistance range Resistance value when 25°C is 10K Ω for all Skyair Inverter Indoor models t°C Rmin (kΩ) Rnom (kΩ) Rmax (kΩ) t°C...

  • Page 36: Installation Condition Check

    Appendix A 2. Inverter unit refrigerant check procedures Refrigerant system check. Is the discharge pipe thermistor Reconnect the thermistor. disconnected from the holder? Check for refrigerant leakage. Replace the refrigerant. See troubleshooting for U0 error. 3. Installation condition check Installation condition check. Check the allowable dimensions Change the installation...
  • Page 37 Appendix A 4. Power supply waveforms check procedures Measure the power supply waveform between Live and Neutral on the terminal board, and check the waveform disturbance. (using oscilloscope) • Check if the power supply waveform is a sine wave (Fig. 1). •...
  • Page 38 Product manufactured in an ISO certifi ed facility. This document contains the most current information as of this orienting. For the most up to date product information, please go to www.daikin-oyl.com.my...

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