Daikin FTK Series Service Manual
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Daikin FTK Series Service Manual

Inverter split wall mounted type
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Service
Manual
Inverter Split
Wall Mounted Type FTK(X) Series
DAMA-SM-21-001
[Applied Models]
Inverter Split : Cooling Unit
Heat Pump Unit

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Summary of Contents for Daikin FTK Series

  • Page 1 DAMA-SM-21-001 Service Manual Inverter Split Wall Mounted Type FTK(X) Series [Applied Models] Inverter Split : Cooling Unit Heat Pump Unit...

  • Page 3: Table Of Contents

    DAMA-SM-21-001 Introduction ..................1 1. Safety Cautions..................2 1.1 Warnings and Cautions Regarding Safety of Workers......2 1.2 Warnings and Cautions Regarding Safety of Users.........8 2. Icons Used ....................10 3. Revision History ..................11 Part 1 General Information ............12 1. Applicable Models .................13 Part 2 Specifications..............
  • Page 4 DAMA-SM-21-001 Part 4 Remote Controller ............. 50 1. Applicable Remote Controller ...............51 2. BRC52B63/64 ..................52 Part 5 Service Diagnosis .............. 53 1. General Problem Symptoms and Check Items ........54 2. Troubleshooting with LED ..............55 2.1 Indoor Unit....................55 2.2 Outdoor Unit ...................55 3.
  • Page 5 DAMA-SM-21-001 Part 6 Trial Operation and Field Settings ........95 1. Pump Down Operation................96 2. Forced Cooling Operation ..............97 3. Silicone Grease on Power Transistor/Diode Bridge......98 Part 7 Appendix ................99 1. Piping Diagrams..................100 1.1 Indoor Unit....................100 1.2 Outdoor Unit ..................103 2.

  • Page 6: Introduction

    DAMA-SM-21-001 Introduction 1. Safety Cautions..................2 1.1 Warnings and Cautions Regarding Safety of Workers......2 1.2 Warnings and Cautions Regarding Safety of Users.........8 2. Icons Used ....................10 3. Revision History ..................11 Introduction...

  • Page 7: Safety Cautions

    Safety Cautions DAMA-SM-21-001 1. Safety Cautions Be sure to read the following safety cautions before conducting repair work. After the repair work is complete, be sure to conduct a test operation to ensure that the equipment operates normally, and explain the cautions for operating the product to the customer.
  • Page 8 DAMA-SM-21-001 Safety Cautions Warning Do not turn the air conditioner on or off by plugging in or unplugging the power cable. Plugging in or unplugging the power cable to operate the equipment may cause an electrical shock or fire. Be sure to wear a safety helmet, gloves, and a safety belt when working in a high place (more than 2 m).
  • Page 9 Safety Cautions DAMA-SM-21-001 Safety Checklist  Checking the area Before beginning work, conduct safety checks to minimise the risk of ignition. When repairing the refrigerating system, take the following precautions before work.  Work procedure Work shall be conducted under a controlled procedure so as to minimise the risk of working in the presence of R410A or vapour.
  • Page 10 DAMA-SM-21-001 Safety Cautions Safety Checklist (con't)  Checking electrical devices Repair and maintenance to electrical components shall include initial safety checks and component inspection procedures. In case there is any fault that could endanger safety, no electrical supply shall be connected to the circuit until the fault is satisfactorily dealt with. Initial safety checks shall include: ...
  • Page 11 Safety Cautions DAMA-SM-21-001 Safety Checklist (con't)  Leak detection methods The following leak detection methods can be applied for systems containing R410A. Electronic leak detectors shall be used to detect R410A, but the sensitivity may not be adequate or may need re-calibration (detection equipment shall be calibrated in a refrigerant-free area).
  • Page 12 DAMA-SM-21-001 Safety Cautions Safety Checklist (con't)  Decommissioning Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its details. It is recommended to train technicians so that all of the refrigerant is recovered safely.

  • Page 13: Warnings And Cautions Regarding Safety Of Users

    Safety Cautions DAMA-SM-21-001 Warnings and Cautions Regarding Safety of Users Warning Do not store the equipment in a room with fire sources (e.g., naked flames, gas appliances, electric heaters). Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work.
  • Page 14 DAMA-SM-21-001 Safety Cautions Warning Check to make sure that the power cable plug is not dirty or loose, then insert the plug into a power outlet securely. If the plug is dusty or has a loose connection, it may cause an electrical shock or fire.

  • Page 15: Icons Used

    Icons Used DAMA-SM-21-001 2. Icons Used The following icons are used to attract the attention of the reader to specific information. Icon Type of Description Information Warning Warning is used when there is danger of personal injury. Warning Caution Caution is used when there is danger that the reader, through incorrect manipulation, may damage equipment, Caution lose data, get an unexpected result or have to restart (part...

  • Page 16: Revision History

    DAMA-SM-21-001 Revision History 3. Revision History Month/Year Version Revised contents 03/2021 DAMA-SM-21-001 First edition Introduction...

  • Page 17: Part 1 General Information

    DAMA-SM-21-001 Part 1 General Information 1. Applicable Models .................13 Part 1 General Information...

  • Page 18: Applicable Models

    DAMA-SM-21-001 Applicable Models 1. Applicable Models Model Name and Power Supply Mode Indoor Unit Outdoor Unit Power Supply FTK09AXVJU RK09AXVJU FTK12AXVJU RK12AXVJU Cooling Only FTK18AXVJU RK18AXVJU FTK24AXVJU RK24AXVJU 1Phase, 208/230V, 60Hz FTX09AXVJU RX09AXVJU FTX12AXVJU RX12AXVJU Heatpump FTX18AXVJU RX18AXVJU FTX24A XVJU RX24AXVJU General Information...
  • Page 19 Applicable Models DAMA-SM-21-001 Nomenclature Indoor Unit Definition Description Unit Category F : Air-Cooled Split Indoor Unit Product Type T : Wall Mounted K : Inverter, Cooling Only System X : Inverter, Heatpump Capacity Indication* 09 : 9,000 Btu/h Major Design Category A : A Series Factory Origin X : Malaysia...

  • Page 20: Part 2 Specifications

    DAMA-SM-21-001 Part 2 Specifications 1. Specification Data .................16 2. Functions....................22 Part 2 Specifications...

  • Page 21: Specification Data

    Specification Data DAMA-SM-21-001 1. Specification Data Cooling Only INDOOR UNIT FTK09A FTK12A MODEL OUTDOOR UNIT RK09A RK12A 2.61 (1.30 - 3.00) 3.20 (1.30 - 3.90) Rated Capacity (Min. ~ Max.) Btu/h 8900 (4400 - 10200) 10900 (4400 - 13300) Moisture Removal gal/h 0.08 0.19...
  • Page 22 DAMA-SM-21-001 Specification Data INDOOR UNIT FTK18A FTK24A MODEL OUTDOOR UNIT RK18A RK24A 5.28 (1.60 - 5.86) 6.21 (1.60 - 7.03) Rated Capacity (Min. ~ Max.) Btu/h 18000 (5500 - 20000) 21200 (5500 - 24000) Moisture Removal gal/h 0.41 0.67 Rated Running Current 6.39 7.70 Rated Power Consumption...
  • Page 23 Specification Data DAMA-SM-21-001 Heatpump INDOOR UNIT FTX09A MODEL RX09A OUTDOOR UNIT Cooling Heating 2.61 (1.30 - 3.00) 2.93 (1.30 - 3.80) Rated Capacity (Min. ~ Max.) Btu/h 8900 (4400 - 10200) 10000 (4400 - 13000) Moisture Removal gal/h 0.08 Rated Running Current 3.36 3.33 Rated Power Consumption...
  • Page 24 DAMA-SM-21-001 Specification Data INDOOR UNIT FTX12A MODEL RX12A OUTDOOR UNIT Cooling Heating 3.20 (1.30 - 3.90) 3.96 (1.30 - 4.80) Rated Capacity (Min. ~ Max.) Btu/h 10900 (4400 - 13300) 13500 (4400 - 16400) Moisture Removal gal/h 0.19 Rated Running Current 3.99 4.70 Rated Power Consumption...
  • Page 25 Specification Data DAMA-SM-21-001 INDOOR UNIT FTX18A MODEL RX18A OUTDOOR UNIT Cooling Heating 5.28 (1.60 - 5.86) 6.33 (1.60 - 7.03) Rated Capacity (Min. ~ Max.) Btu/h 18000 (5500 - 20000) 21600 (5500 - 24000) Moisture Removal gal/h 0.41 Rated Running Current 6.39 7.79 Rated Power Consumption...
  • Page 26 DAMA-SM-21-001 Specification Data INDOOR UNIT FTX24A MODEL RX24A OUTDOOR UNIT Cooling Heating 6.21 (1.60 - 7.03) 6.92 (1.70 - 8.10) Rated Capacity (Min. ~ Max.) Btu/h 21200 (5500 - 24000) 23600 (5800 - 27600) Moisture Removal gal/h 0.67 Rated Running Current 7.70 8.90 Rated Power Consumption...

  • Page 27: Functions

    Functions DAMA-SM-21-001 2. Functions Category Functions Inverter     Operation Limit for Cooling (°CDB)(O/D) 10 - 46 10 - 46 10 - 46 10 - 46 Basic Function Operation Limit for Cooling (°FDB)(O/D) 50 - 114.8 14 - 114.8 14 - 114.8 50 - 114.8 Operation Limit for Heating (°CDB)(O/D)

  • Page 28: Part 3 Functions And Control

    DAMA-SM-21-001 Part 3 Functions and Control 1. Main Functions..................24 1.1 Temperature Control ................24 1.2 Frequency Control..................24 1.3 Airflow Direction Control.................26 1.4 Fan Speed Control for Indoor Unit ............26 1.5 Dry Mode....................27 1.6 Automatic Operation................28 1.7 Thermostat Control.................29 1.8 ECO+ Operation ..................30 1.9 Sleep Mode ....................31 1.10 POWERFUL Operation ................31 1.11 Other Functions..................32...

  • Page 29: Main Functions

    Main Functions DAMA-SM-21-001 1. Main Functions Temperature Control Definitions of The definitions of temperatures are classified as following. Temperatures  Room temperature: temperature of lower part of the room  Set temperature: temperature set by remote controller  Room thermistor temperature: temperature detected by room temperature thermistor ...
  • Page 30 DAMA-SM-21-001 Main Functions The following drawing shows a schematic view of the inverter principle: Refrigerant circulation rate (high) high speed Amount of heat Amount of heat exchanged air (large) exchanged air (large) high f low f Amount of heat Amount of heat exchanged air (small) exchanged air (small) low speed...

  • Page 31: Airflow Direction Control

    In automatic fan speed operation, the step SL, & SH is not available. Speed Control Step Cooling Heating = The airflow rate is automatically controlled within this range when FAN setting button is set to automatic. Series Class FTK Series Functions and Control...

  • Page 32: Dry Mode

    DAMA-SM-21-001 Main Functions Series Class 431(C) 402(H) 436(C) 412 (H) FTX Series Cooling The following drawings explain the principle of fan speed control for cooling. Room thermistor temperature – set temperature Fan speed +2°C (+3.6°F) +1.5°C (+2.7°F) +1.5°C (+2.7°F) +0.5°C (+0.9°F) Heating The following drawings explain the principle of fan speed control for heating.

  • Page 33: Automatic Operation

    Main Functions DAMA-SM-21-001 Zone C - Thermostat ON Zone B Zone B +0.5 C (0.9 ° ° Zone A - Thermostat OFF Target temperature X Thermostat OFF point Y Thermostat ON point Y Room thermistor temperature Room thermistor temperature Setting temperature - X = (<...

  • Page 34: Thermostat Control

    DAMA-SM-21-001 Main Functions Thermostat Control Outline Thermostat control is based on the difference between the room thermistor temperature and the set temperature. Details Thermostat OFF Conditions  The temperature difference is in the zone A. Thermostat ON Conditions  The temperature difference returns to the zone C after being in the zone A. ...

  • Page 35: Eco+ Operation

    Main Functions DAMA-SM-21-001 ECO+ Operation Outline ECO+ operation reduces the maximum operating power input and adjust the target temperature setting. This operation is particularly convenient for energy-saving. It is also a major bonus when breaker capacity does not allow the use of multiple electrical devices and air conditioners. It can be easily activated by pressing ECO+ button on the wireless remote controller.

  • Page 36: Sleep Mode

    DAMA-SM-21-001 Main Functions Sleep Mode Outline SLEEP Mode can be activated through the remote controller to keep the thermal comfort while sleeping. Details SLEEP Mode continues operation at the target temperature for the first hour, then automatically raises the target temperature slightly in case of cooling, or lowers it slightly in case of heating. This prevents excessive cooling in summer and excessive heating in winter to ensure comfortable sleeping conditions and also saves electricity.

  • Page 37: Other Functions

    Main Functions DAMA-SM-21-001 1.11 Other Functions 1.11.1 Signal Receiving Sign When the indoor unit receives a signal from the remote controller, the unit emits a signal receiving sound. 1.11.2 Indoor Unit ON/OFF Switch Indoor unit ON/OFF switch is provided on the display of the unit. ...

  • Page 38: Thermistor Functions

    DAMA-SM-21-001 Thermistor Functions 2. Thermistor Functions (A)FTXC series only (2) Outdoor Heat (5) Room Exchanger Temperature Thermistor (3) Outdoor Thermistor Expansion valve Temperature Thermistor (4) Indoor Heat Exchanger Thermistor Four way valve (1) Discharge Pipe Compressor Temperature (1) Discharge  The discharge pipe thermistor is used for controlling discharge pipe temperature. If the Pipe Thermistor discharge pipe temperature (used in place of the inner temperature of the compressor) rises abnormally, the operating frequency becomes lower or the operation halts.

  • Page 39: Control Specification

    The air conditioner control has normal operation mode, forced operation mode, and power transistor test mode for installation and servicing. Details Applicable for FTK series. There are following modes; Fan, Cooling (includes drying), Stop. Air conditioner control mode Forced operation mode...

  • Page 40: Frequency Control

    DAMA-SM-21-001 Control Specification Frequency Control Outline The compressor frequency is determined according to the difference between the room thermistor temperature and the target temperature. When the shift of the frequency is less than zero (∆F<0) by PI control, the target frequency is used as the command frequency. Dropping function Input current control, etc.
  • Page 41 Control Specification DAMA-SM-21-001 Initial Frequency When starting the compressor, the frequency is initialized according to the ΔD value of the indoor unit. ΔD signal: Indoor frequency command The difference between the room thermistor temperature and the target temperature is taken as the ΔD value and is used for ΔD signal of frequency command.

  • Page 42: Standby Electricity Saving (Suspend Function)

    DAMA-SM-21-001 Control Specification Standby Electricity Saving (Suspend Function) Outline This function is to save standby electricity consumption while the air conditioner is not in operation by partially separating the electrical circuit of indoor and outdoor units from the power source. Details ...
  • Page 43 Control Specification DAMA-SM-21-001 3.4.3 Four Way Valve Switching Outline Heat Pump Only During the heating operation current must be conducted and during cooling and defrosting current must not be conducted. In order to eliminate the switching sound (as the four way valve coil switches from ON to OFF) when the heating is stopped, the delay switch of the four way valve must be carried out after the operation stopped.

  • Page 44: Discharge Pipe Temperature Control

    DAMA-SM-21-001 Control Specification Discharge Pipe Temperature Control Outline The discharge pipe temperature is used as the internal temperature of the compressor. If the discharge pipe temperature rises above a certain level, the upper limit of frequency is set to keep the discharge pipe temperature from rising further. Details Stop zone A°C (°F)

  • Page 45: Input Current Control

    Control Specification DAMA-SM-21-001 Input Current Control Outline The microcomputer calculates the input current while the compressor is running, and sets the frequency upper limit based on the input current. Details Compressor Stop Stop zone Dropping zone Keep zone Input current Reset zone ...

  • Page 46: Freeze-Up Protection Control

    DAMA-SM-21-001 Control Specification Freeze-up Protection Control Outline During cooling operation, the signals sent from the indoor unit control the operating frequency limitation and prevent freezing of the indoor heat exchanger. The signal from the indoor unit is divided into zones. Details The operating frequency limitation is judged with the indoor heat exchanger temperature.

  • Page 47: Heating Peak-Cut Control

    Control Specification DAMA-SM-21-001 Heating Peak-cut Control Outline Heat Pump Only During heating operation, the signals being sent from the indoor unit allow the operating frequency limitation and prevent abnormal high pressure. (The signal from the indoor unit must be divided as follows.) Details Conditions for Start Controlling Judge the controlling start with the indoor heat exchanger temperature after 2 sec.

  • Page 48: Outdoor Fan Control

    DAMA-SM-21-001 Control Specification Outdoor Fan Control 1. Fan ON control to cool down the electrical box The outdoor fan is turned ON when the electrical box temperature is high while the compressor is OFF. 2. Fan OFF delay when stopped The outdoor fan is turned OFF 70 seconds after the compressor stops.

  • Page 49: Liquid Compression Protection Function

    Control Specification DAMA-SM-21-001 3.10 Liquid Compression Protection Function Outline In order to increase the dependability of the compressor, the compressor is stopped according to the outdoor temperature. Details Operation stops depending on the outdoor temperature. The compressor turns off under the conditions that the system is in cooling operation and outdoor temperature is below X°C (X°F).

  • Page 50: Electronic Expansion Valve Control

    DAMA-SM-21-001 Control Specification 3.12 Electronic Expansion Valve Control 3.12.1 Summary of Electronic Expansion Valve Control Controlling the electronic expansion valve is to ensure the reliability while optimizing the refrigerating cycle responding to the operation status. The summary of electronic expansion valve control is shown as below. Functions and Control...

  • Page 51: Electronic Expansion Valve Control

    Control Specification DAMA-SM-21-001 3.12.2 Full Close as Power Supply ON When the power is turned ON, the electronic expansion valve is initialized to position the valve opening and facilitate pressure equalization. (Prevent the compressor from being locked by start-up with differential pressure) Processes as power supply ON ...
  • Page 52 DAMA-SM-21-001 Control Specification 3.12.9 High Discharge Pipe Temperature Control When the compressor is operating, if the discharge pipe temperature exceeds a certain value, the electronic expansion valve opens and the refrigerant runs to the low pressure side. This procedure lowers the discharge pipe temperature by cooling the compressor with refrigerant. A (°C) B (°C) A (°F)
  • Page 53 Control Specification DAMA-SM-21-001 For cooling mode: Discharge pipe temperature + C°C (°F) < outdoor heat exchanger temperature C (°C) C (°F) 42.8 42.8 42.8 42.8 For heating mode: Discharge pipe temperature + D°C (°F) < indoor heat exchanger temperature D (°C) D (°F) 42.8 42.8...

  • Page 54: Malfunctions

    DAMA-SM-21-001 Control Specification 3.13 Malfunctions 3.13.1 Sensor Malfunction Detection Sensor malfunction can be detected in the following thermistors in open or short circuit. 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Radiation fin thermistor 4. Outdoor temperature thermistor 3.13.2 Detection of Overcurrent and Overload Outline In order to protect the inverter, an excessive output current is detected in wire labelled as No 1...

  • Page 55: Part 4 Remote Controller

    DAMA-SM-21-001 Part 4 Remote Controller 1. Applicable Remote Controller ...............51 2. BRC52B63/64 ..................52 Remote Controller...

  • Page 56: Applicable Remote Controller

    Applicable Remote Controller DAMA-SM-21-001 1. Applicable Remote Controller Series Model Name Remote Controller FTK09/12/18/24AXVJU BRC52B64 FTX09/12/18/24AXVJU BRC52B63 Remote Controller...

  • Page 57: Brc52B63/64

    BRC52B63/64 DAMA-SM-21-001 2. BRC52B63/64 GV: GOODMAN (USA) FTK(X)09/12/18/24AXVJU REMOTE CONTROLLER OVERVIEW For cooling/heating model IR Signal Transmitter To enable signal • transmission, direct the transmitter at the indoor Display (LCD) unit. Display the current Note that in condition • settings. where there is an obstacle (This illustration shows the that blocks between the...

  • Page 58: Part 5 Service Diagnosis

    DAMA-SM-21-001 Part 5 Service Diagnosis 1. General Problem Symptoms and Check Items ........54 2. Troubleshooting with LED ..............55 2.1 Indoor Unit....................55 2.2 Outdoor Unit ...................55 3. Error Diagnosis ..................56 3.1 To enter error diagnosis .................56 4. Troubleshooting ..................57 4.1 Error Codes and Description ..............58 4.2 Indoor Unit PCB Abnormality ..............59 4.3 Freeze-up Protection Control ..............60 4.4 Indoor Fan Motor (DC Motor) or Related Abnormality ......61...

  • Page 59: General Problem Symptoms And Check Items

    DAMA-SM-21-001 General Problem Symptoms and Check Items 1. General Problem Symptoms and Check Items Reference Symptom Check Item Details Page The unit does not operates. Check the power supply. Check if the rated voltage is supplied. — Check the type of the indoor unit. Check if the indoor unit type is compatible —...

  • Page 60: Troubleshooting With Led

    Troubleshooting with LED DAMA-SM-21-001 2. Troubleshooting with LED Indoor Unit Operation Lamp The operation lamp blinks when any of the following errors is detected. 1. A protection device of the indoor or outdoor unit is activated, or the thermistor malfunctions. 2.

  • Page 61: Error Diagnosis

    DAMA-SM-21-001 Error Diagnosis 3. Error Diagnosis To enter error diagnosis GV : Press [Timer CANCEL] to scroll to next °C TIMER CANCEL GV (FT(X)A) Notes 1. A short beep and two consecutive beeps indicate non-corresponding codes. 2. To return to the normal mode. GV : Press [Timer CANCEL] for 5 seconds When the remote controller is left untouched for 60 seconds, it also returns to the normal mode.

  • Page 62: Troubleshooting

    Troubleshooting DAMA-SM-21-001 4. Troubleshooting Error Codes and Description Error Description Reference Page Codes System Normal condition Low-voltage detection or over-voltage detection Signal transmission error (between indoor unit and outdoor unit) Installation error (between indoor unit and outdoor unit) Indoor Unit Indoor unit PCB abnormality Freeze-up protection control Indoor fan motor (DC motor) or related abnormality...
  • Page 63 DAMA-SM-21-001 Troubleshooting  Eror Code Definition Error Code Checklist Meaning Normal  Indoor PCB error  Drain pump abnormal Antifreeze  Indoor fan motor abnormal  Electrical air cleaner abnormal Indoor heat exchanger (1) thermistor short / open  Indoor heat exchanger (2) thermistor short / open Louver limit switch error Indoor room thermistor short / open ...

  • Page 64: Indoor Unit Pcb Abnormality

    Troubleshooting DAMA-SM-21-001 Indoor Unit PCB Abnormality Error Code Description Indoor PCB Abnormality Method of Error The system checks if the circuit works properly within the microcomputer of the indoor unit. Detection Error Decision ON/OFF switch malfunction. Conditions Possible root 1. Defective indoor unit PCB. cause 2.

  • Page 65: Freeze-Up Protection Control

    DAMA-SM-21-001 Troubleshooting Freeze-up Protection Control Error Code Method of Error During cooling operation, the freeze-up protection control (operation halt) is activated according to the temperature detected by the indoor heat exchanger thermistor. Detection High pressure control (heat pump model only). During heating operations, the temperature detected by the indoor heat exchanger.

  • Page 66: Indoor Fan Motor (Dc Motor) Or Related Abnormality

    Troubleshooting DAMA-SM-21-001 Indoor Fan Motor (DC Motor) or Related Abnormality Error Code Description Indoor Fan Motor Abnormality Method of Error The rotation speed detected by the Hall IC during fan motor operation is used to determine Detection abnormal fan motor operation. Error Decision The detected rotation speed does not reach the demanded rotation speed of the target tap, and is less than 50% of the maximum fan motor rotation speed.

  • Page 67: Thermistor Or Related Abnormality (Indoor Unit)

    DAMA-SM-21-001 Troubleshooting Thermistor or Related Abnormality (Indoor Unit) Error Code Description Indoor Heat Exchange Thermistor Short/Open. Method of Error The temperature detected by the thermistors determine thermistor errors. Detection Error Decision The resistance of the thermistor is out of range (0 Ω or ∞ Ω) Conditions Supposed ...

  • Page 68: Thermistor Or Related Abnormality (Indoor Unit)

    Troubleshooting DAMA-SM-21-001 Thermistor or Related Abnormality (Indoor Unit) Error Code Description Indoor Heat Exchange Thermistor Short/Open. Method of Error The temperature detected by the thermistors determine thermistor errors. Detection Error Decision The resistance of the thermistor is out of range (0 Ω or ∞ Ω) Conditions Supposed ...

  • Page 69: Low-Voltage Detection Or Over-Voltage Detection

    DAMA-SM-21-001 Troubleshooting Low-voltage Detection or Over-voltage Detection Error Code Method of Error Low-voltage detection: An abnormal voltage drop is detected by the DC voltage detection circuit. Detection Over-voltage detection: An abnormal voltage rise is detected by the DC over-voltage detection circuit. Error Decision Low-voltage detection: ...

  • Page 70: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)

    Troubleshooting DAMA-SM-21-001 Signal Transmission Error (Between Indoor Unit and Outdoor Unit) Error Code Method of Error The signal transmission data received from the outdoor unit is checked whether it is normal. Detection Error Decision The data sent from the outdoor unit cannot be received normally, or the content of the data is Conditions abnormal.
  • Page 71 DAMA-SM-21-001 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Caution Check the power supply voltage. Is the voltage fluctuation Correct the power supply. within ±10% from the rated value? Check the connection wires between the indoor unit and the outdoor unit.

  • Page 72: Installation Error

    Troubleshooting DAMA-SM-21-001 Installation error Error Code Method of Error The supply power is detected for its requirements (pair type is different from multi type) by the Detection indoor/outdoor transmission signal. Error Decision The pair type and multi type are interconnected. Conditions Supposed ...

  • Page 73: Outdoor Unit Pcb Abnormality

    DAMA-SM-21-001 Troubleshooting 4.10 Outdoor Unit PCB Abnormality Error Code Method of Error  The system checks if the microcomputer is working in order. Detection  The system checks if the zero-cross signal comes in properly. Error Decision  The microcomputer program runs out of control. Conditions ...

  • Page 74: Ol Activation (Compressor Overload)

    Troubleshooting DAMA-SM-21-001 4.11 OL Activation (Compressor Overload) Error Code Description OL activation (compressor overload). Method of Error A compressor overload is detected through compressor OL. Detection Error Decision  If the error repeats, the system is shut down.  Reset condition: Continuous run for about 60 minutes without any other error Conditions Possible Root 1.
  • Page 75 DAMA-SM-21-001 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Caution Discharge pipe thermistor Insert the thermistor in disconnected? position. Replace the discharge pipe Check the thermistors thermistor. • Discharge pipe thermistor Connectors are Connect the connectors properly connected?

  • Page 76: Compressor Lock

    Troubleshooting DAMA-SM-21-001 4.12 Compressor Lock Error Code Description Compressor lock. Method of Error A compressor lock is detected by checking the compressor running condition through the Detection position detection circuit. Error Decision  If the error repeats, the system is shut down. ...

  • Page 77: Dc Fan Lock

    DAMA-SM-21-001 Troubleshooting 4.13 DC Fan Lock Error Code Method of Error An error is determined with the high-voltage fan motor rotation speed detected by the Hall IC. Detection Error Decision  The fan does not start in about 30 ~ 60 seconds (depending on the model) even when the Conditions fan motor is running.

  • Page 78: Input Overcurrent Detection

    Troubleshooting DAMA-SM-21-001 4.14 Input Overcurrent Detection Error Code Description Input Overcurrent Detection Method of Error An input overcurrent is detected by checking the input current value with the compressor Detection running. Error Decision The current exceeds 10 ~ 15 A (depending on the model) for 2.5 seconds with the compressor running. The upper limit of the current decreases when the outdoor temperature exceeds a certain level.

  • Page 79: Discharge Pipe Temperature Control

    DAMA-SM-21-001 Troubleshooting 4.15 Discharge Pipe Temperature Control Error Code Method of Error An error is determined with the temperature detected by the discharge pipe thermistor. Detection Error Decision  If the temperature detected by the discharge pipe thermistor rises above A°C (°F), the compressor stops.

  • Page 80: High Pressure Control In Cooling

    Troubleshooting DAMA-SM-21-001 4.16 High Pressure Control in Cooling Error Code Method of Error High-pressure control (operation halt, frequency drop, etc.) is activated in cooling mode if the temperature sensed by the outdoor heat exchanger thermistor exceeds the limit. Detection Error Decision ...
  • Page 81 DAMA-SM-21-001 Troubleshooting Reference Check No.01 Refer to P.87 Reference Check No.12 Refer to P.88 Reference Check No.17 Refer to P.91 Reference Check No.18 Refer to P.91 Reference Check No.19 Refer to P.92 Note When replacing the defective thermistor(s), replace the thermistor as ASSY. Service Diagnosis...

  • Page 82: Compressor System Sensor Abnormality

    Troubleshooting DAMA-SM-21-001 4.17 Compressor System Sensor Abnormality Error Code Method of Error The system checks the DC current before the compressor starts. Detection Error Decision  The voltage converted from the DC current before compressor start-up is out of the range Conditions 0.5 ~ 4.5 V.

  • Page 83: Position Sensor Abnormality

    DAMA-SM-21-001 Troubleshooting 4.18 Position Sensor Abnormality Error Code Description Position Sensor Abnormality Method of Error A compressor start-up failure is detected by checking the compressor running condition through the position detection circuit. Detection Error Decision  The compressor fails to start in about 15 seconds after the compressor run command signal is sent.

  • Page 84: Thermistor Or Related Abnormality (Outdoor Unit)

    Troubleshooting DAMA-SM-21-001 4.19 Thermistor or Related Abnormality (Outdoor Unit) H9, J3, J6 and P4 Error Code Description Thermistor or Related Abnormality (Outdoor Unit) Method of Error This fault is identified based on the thermistor input voltage to the microcomputer. Detection A thermistor fault is identified based on the temperature sensed by each thermistor.
  • Page 85 DAMA-SM-21-001 Troubleshooting Reference Check No.01 Refer to P.87 Note When replacing the defective thermistor(s), replace the thermistor as ASSY. Service Diagnosis...

  • Page 86: Electrical Box Temperature Rise

    Troubleshooting DAMA-SM-21-001 4.20 Electrical Box Temperature Rise Error Code Method of Error An electrical box temperature rise is detected by checking the radiation fin thermistor with the Detection compressor off. Error Decision  With the compressor off, the radiation fin temperature is above A °C (°F). ...

  • Page 87: Radiation Fin Temperature Rise

    DAMA-SM-21-001 Troubleshooting 4.21 Radiation Fin Temperature Rise Error Code Method of Error A radiation fin temperature rise is detected by checking the radiation fin temperature with the compressor on. Detection Error Decision  The radiation fin temperature with the compressor on is above A °C (°F). ...

  • Page 88: Output Overcurrent Detection

    Troubleshooting DAMA-SM-21-001 4.22 Output Overcurrent Detection Error Code Description Output Overcurrent Detection Method of Error An output overcurrent is detected by checking the current that flows in the inverter DC section. Detection Error Decision  A position signal error occurs while the compressor is running. ...
  • Page 89 DAMA-SM-21-001 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No. 17 Check the installation condition. Fully open the stop valve. Stop valve fully open? Turn off the power. Then, turn on the power to restart the system.

  • Page 90: Four Way Valve Abnormality

    Troubleshooting DAMA-SM-21-001 4.23 Four Way Valve Abnormality Remote Controller Display Method of The indoor air temperature thermistor, the indoor unit heat exchanger thermistor, the outdoor temperature thermistor and the outdoor unit heat exchanger thermistor are checked to see if the Malfunction function within their normal ranges in the operating mode.
  • Page 91 DAMA-SM-21-001 Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Caution Four way valve Correct the four way coil disconnected valve coil. (loose)? Harness Reconnect the disconnected? harness. Check the continuity of the four way valve coil and harness.

  • Page 92: Actuator Check

    Actuator Check DAMA-SM-21-001 5. Actuator Check Thermistor Resistance Check Check No.01 Measure the resistance of each thermistor using multimeter. The resistance values are defined by below table. If the measured resistance value does not match the listed value, the thermistor must be replaced.

  • Page 93: Power Supply Waveform Check

    DAMA-SM-21-001 Actuator Check Power Supply Waveform Check Check No.11 Measure the power supply waveform between No. 1 and No. 2 on the terminal strip, and check the waveform disturbance.  Check if the power supply waveform is a sine wave (Fig.1). ...

  • Page 94: Four Way Valve Performance Check

    Actuator Check DAMA-SM-21-001 Four Way Valve Performance Check Check No.13 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Caution Turn the power off and then on again * Four way valve coil Cooling / Dry / Start heating operation Defrost: Not energized Heating: energized...

  • Page 95: Inverter Unit Refrigerant System Check

    DAMA-SM-21-001 Actuator Check Inverter Unit Refrigerant System Check Check No.14 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Caution Refrigerant system check Is the discharge pipe Reconnect the thermistor. thermistor disconnected from the holder? Check for refrigerant leakage.

  • Page 96: Installation Condition Check

    Actuator Check DAMA-SM-21-001 Installation Condition Check Check No.17 Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Caution Installation condition check Check the allowable dimensions of the air Change the installation suction and location or direction.

  • Page 97: Outdoor Fan System Check

    DAMA-SM-21-001 Actuator Check Outdoor Fan System Check Check No.19 DC motor Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged. Caution Check the outdoor fan system. Fan motor Is the lead wire connector Go to Check No.
  • Page 98 Actuator Check DAMA-SM-21-001 Diagram Main Circuit Short Check for FTK(X)18/24 Service Diagnosis...

  • Page 99: Power Module Check

    DAMA-SM-21-001 Actuator Check 5.11 Power Module Check Check No.22 Check to make sure that the voltage between (+) and (–) of the power module is approximately 0 V before checking.  Disconnect the compressor harness connector from the outdoor unit PCB. To disengage the connector, press the protrusion on the connector.

  • Page 100: Part 6 Trial Operation And Field Settings

    DAMA-SM-21-001 Part 6 Trial Operation and Field Settings 1. Pump Down Operation................96 2. Forced Cooling Operation ..............97 3. Silicone Grease on Power Transistor/Diode Bridge......98 Part 6 Trial Operation and Field Settings...

  • Page 101: Pump Down Operation

    Pump Down Operation DAMA-SM-21-001 1. Pump Down Operation Outline In order to protect the environment, be sure to conduct pump down operation when relocating or disposing of the unit. Details 1. Remove the valve caps from the liquid stop valve and the gas stop valve. 2.

  • Page 102: Forced Cooling Operation

    DAMA-SM-21-001 Forced Cooling Operation 2. Forced Cooling Operation Outline The forced cooling operation is allowed when both the following conditions are met. 1. The outdoor unit is not abnormal and not in the 3-minute standby mode. 2. The outdoor unit is not operating. Protection functions have priority over all other functions during forced cooling operation.

  • Page 103: Silicone Grease On Power Transistor/Diode Bridge

    Silicone Grease on Power Transistor/Diode Bridge DAMA-SM-21-001 3. Silicone Grease on Power Transistor/Diode Bridge Outline Apply the specified silicone grease to the heat radiation part of a power transistor/diode bridge when you replace an outdoor unit PCB. The silicone grease encourages the heat radiation of a power transistor/diode bridge.

  • Page 104: Part 7 Appendix

    DAMA-SM-21-001 Part 7 Appendix 1. Piping Diagrams..................100 1.1 Indoor Unit....................100 1.2 Outdoor Unit ..................103 2. Wiring Diagrams..................107 2.1 Indoor Unit....................107 2.2 Outdoor Unit ..................108 2.3 Printed Circuit Board Connector Wiring Diagram.........110 2.4 Printed Circuit Board Connector Wiring Diagram.........111 3. Operation Limit..................113 Part 7 Appendix...

  • Page 105: Piping Diagrams

    DAMA-SM-21-001 Piping Diagrams 1. Piping Diagrams Indoor Unit Cooling Only Model: FTK09/12A HEAT EXCHANGER THERMISTOR ON HEAT EXCH. FIELD PIPING CROSS FLOW FAN (1/4CuT) SINGLE UNION JOINT FAN MOTOR FIELD PIPING 3/8CuT (3/8CuT) SINGLE UNION JOINT REFRIGERANT FLOW COOLING 3D128356 Note: Dimension in inch Model: FTK18A 1/4 CuT...
  • Page 106 Piping Diagrams DAMA-SM-21-0012 Model: FTK24A 1/4 CuT DISTRIBUTOR HEAT EXCHANGER THERMISTOR CROSS FLOW FAN ON HEAT EXCH. FIELD PIPING 1/4 CuT FAN MOTOR HEADER FIELD PIPING 5/8 CuT 1/2 CuT REFRIGERANT FLOW COOLING 3D128357 Note: Dimension in inch Heatpump Model: FTX09/12A HEAT EXCHANGER THERMISTOR ON HEAT EXCH.
  • Page 107 DAMA-SM-21-001 Piping Diagrams Model: FTX18A 1/4 CuT DISTRIBUTOR HEAT EXCHANGER THERMISTOR CROSS FLOW FAN ON HEAT EXCH. FIELD PIPING 1/4 CuT FAN MOTOR HEADER FIELD PIPING 1/2 CuT 1/2 CuT REFRIGERANT FLOW COOLING HEATING 3D128349 Note: Dimension in inch Model: FTX24A 1/4 CuT DISTRIBUTOR HEAT EXCHANGER...

  • Page 108: Outdoor Unit

    Piping Diagrams DAMA-SM-21-0012 Outdoor Unit Cooling Only Model: RK09A 3D128348 Note: Dimension in inch Model: RK12A 3D128350 Note: Dimension in inch Appendix...
  • Page 109 DAMA-SM-21-001 Piping Diagrams Model: RK18A 3D128351 Note: Dimension in inch Model: RK24A 3D128354 Note: Dimension in inch Appendix...
  • Page 110 Piping Diagrams DAMA-SM-21-0012 Heatpump Model: RX09A 3D128321 Note: Dimension in inch Model: RX12A 3D128343 Note: Dimension in inch Appendix...
  • Page 111 DAMA-SM-21-001 Piping Diagrams Model: RX18A 3D128344 Note: Dimension in inch Model: RX24A 3D128347 Note: Dimension in inch Appendix...

  • Page 112: Wiring Diagrams

    Wiring Diagrams DAMA-SM-21-0012 2. Wiring Diagrams Indoor Unit Cooling Only Model: FTK09/12/18/24A, FTX09/12/18/24A 3P599152C Appendix...

  • Page 113: Outdoor Unit

    DAMA-SM-21-001 Wiring Diagrams Outdoor Unit Model: RK09/12A 3P606152 Model: RK18/24A 3P606148 Appendix...
  • Page 114 Wiring Diagrams DAMA-SM-21-0012 Model: RX09/12A 3P599133A Model: RX18/24A 3P599144A Appendix...

  • Page 115: Printed Circuit Board Connector Wiring Diagram

    DAMA-SM-21-001 Wiring Diagrams Printed Circuit Board Connector Wiring Diagram Control PCB CN_SW_UD Connector for swing motor (horizontal blade) (A1P) CN_DSP Connector for display/signal receiver PCB (A2P) CN_COIL Connector for indoor heat exchange thermistor (R2T) CN_DCFN Connector for DC fan motor LIVE, NEUTRAL, SIG Connector for terminal strip EARTH...

  • Page 116: Printed Circuit Board Connector Wiring Diagram

    Wiring Diagrams DAMA-SM-21-0012 Note The symbols in the parenthesis are the names on the appropriate wiring diagram. Printed Circuit Board Connector Wiring Diagram 2.4.1 09/12 Class Main PCB (A1P) Connector for electronic expansion valve coil Connector for overload protector Connector for DC fan motor Connector for thermistors (outdoor temperature, outdoor heat exchanger, discharge pipe temperature)
  • Page 117 DAMA-SM-21-001 Wiring Diagrams 2.4.2 18/24 Class Main PCB (A1P) Connector for electronic expansion valve coil Connector for overload protector Connector for DC fan motor Connector for thermistors (outdoor temperature, outdoor heat exchanger, discharge pipe temperature) HL1, HN1, S Connector for terminal strip E1, E2 Terminals for earth wire U, V, W...

  • Page 118: Operation Limit

    Operation Limit DAMA-SM-21-0012 3. Operation Limit Cooling Only Model: RK-A The use of your air conditioner outside the range of working temperature and humidity can result in serious failure. 3P601788-1A Heatpump Model: RX-A 3P601788-1A Appendix...
  • Page 119 Improper installation can result in water or refrigerant leakage, electrical shock, fire or explosion. Use only those parts and accessories supplied or specified by Daikin. Ask a qualified installer or contractor to install those parts and accessories. Use of unauthorized parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage, electrical shock, fire or explosion.

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