Daikin FTKN09NMVJU Service Manual
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Daikin FTKN09NMVJU Service Manual

Inverter pair wall mounted type ftk(x)n-n, ftk(x)-n series
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See also: Operating Manual , Installation Manual
Service
Manual
Inverter Pair
Wall Mounted Type
FTK(X)N-N, FTK(X)-N Series
[Applied Models]
Inverter Pair : Cooling Only
Inverter Pair : Heat Pump
SiUS041501E

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Summary of Contents for Daikin FTKN09NMVJU

  • Page 1 SiUS041501E Service Manual Inverter Pair Wall Mounted Type FTK(X)N-N, FTK(X)-N Series [Applied Models] Inverter Pair : Cooling Only Inverter Pair : Heat Pump...
  • Page 2 SiUS041501E Inverter Pair Wall Mounted Type FTK(X)N-N, FTK(X)-N Series Cooling Only Indoor Unit FTKN09NMVJU FTK09NMVJU FTKN12NMVJU FTK12NMVJU FTKN18NMVJU FTK18NMVJU FTKN24NMVJU FTK24NMVJU Outdoor Unit RKN09NMVJU RK09NMVJU RKN12NMVJU RK12NMVJU RKN18NMVJU RK18NMVJU RKN24NMVJU RK24NMVJU Heat Pump Indoor Unit FTXN09NMVJU FTX09NMVJU FTXN12NMVJU FTX12NMVJU FTXN18NMVJU...

  • Page 3: Table Of Contents

    SiUS041501E 1. Safety Cautions................... v 1.1 Warnings and Cautions Regarding Safety of Workers......... v 1.2 Warnings and Cautions Regarding Safety of Users........vii 2. Used Icons ....................x Part 1 List of Functions ..............1 1. Functions.....................2 Part 2 Specifications ............... 6 1.
  • Page 4 SiUS041501E 3.10 Defrost Control ................... 43 3.11 Electronic Expansion Valve Control ............44 3.12 Malfunctions ....................47 Part 5 Remote Controller ............... 48 1. Cooling Only....................49 2. Heat Pump ....................51 Part 6 Service Diagnosis..............53 1. General Problem Symptoms and Check Items .........55 2.
  • Page 5 SiUS041501E 5.9 Installation Condition Check............... 98 5.10 Discharge Pressure Check................. 98 5.11 Outdoor Fan System Check ............... 99 5.12 Main Circuit Short Check................99 5.13 Power Module Check ................100 Part 7 Trial Operation and Field Settings........102 1. Tips for Servicing ..................103 1.1 Pump Down Operation ................

  • Page 6: Safety Cautions

    Safety Cautions SiUS041501E 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. Caution Items The caution items are classified into Warning and...
  • Page 7 SiUS041501E Safety Cautions Warning Do not start or stop the air conditioner operation by plugging or unplugging the power cable plug. Plugging or unplugging the power cable plug 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 at a high place (more than 2 m).

  • Page 8: Warnings And Cautions Regarding Safety Of Users

    Safety Cautions SiUS041501E Caution Be sure to check that the refrigerating cycle section has cooled down enough before conducting repair work. Working on the unit when the refrigerating cycle section is hot may cause burns. Use the welder in a well-ventilated place. Using the welder in an enclosed room may cause oxygen deficiency.
  • Page 9 SiUS041501E Safety Cautions Warning When wiring between the indoor and outdoor units, make sure that the terminal cover does not lift off or dismount because of the cable. If the cover is not mounted properly, the terminal connection section may cause an electrical shock, excessive heat generation or fire.
  • Page 10 Safety Cautions SiUS041501E 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 11: Used Icons

    SiUS041501E Used Icons 2. Used Icons The following icons are used to attract the attention of the reader to specific information. Icon Type of Description Information Warning A Warning is used when there is danger of personal injury. Warning Caution A Caution is used when there is danger that the reader, through incorrect manipulation, may damage equipment, lose data, get Caution...

  • Page 12: Part 1 List Of Functions

    SiUS041501E Part 1 List of Functions 1. Functions.....................2 List of Functions...

  • Page 13: Functions

    SiUS041501E Functions 1. Functions Category Functions Category Functions Basic Inverter (with inverter power control) Health & Air-purifying filter — — Function Clean 10 ~ 10 ~ Photocatalytic deodorizing filter — — Operation limit for cooling (°CDB) Air-purifying filter with photocatalytic —...
  • Page 14 Functions SiUS041501E Category Functions Category Functions Basic Inverter (with inverter power control) Health & Air-purifying filter — — Function Clean 10 ~ 10 ~ Photocatalytic deodorizing filter — — Operation limit for cooling (°CDB) Air-purifying filter with photocatalytic — — 50 ~ 50 ~ deodorizing function...
  • Page 15 SiUS041501E Functions Category Functions Category Functions Basic Inverter (with inverter power control) Health & Air-purifying filter — — Function Clean 10 ~ 10 ~ Photocatalytic deodorizing filter — — Operation limit for cooling (°CDB) Air-purifying filter with photocatalytic — — 50 ~ 50 ~ deodorizing function...
  • Page 16 Functions SiUS041501E Category Functions Category Functions Basic Inverter (with inverter power control) Health & Air-purifying filter — — Function Clean 10 ~ 10 ~ Photocatalytic deodorizing filter — — Operation limit for cooling (°CDB) Air-purifying filter with photocatalytic — — 50 ~ 50 ~ deodorizing function...

  • Page 17: Part 2 Specifications

    SiUS041501E Part 2 Specifications 1. Specifications ....................7 1.1 Cooling Only....................7 1.2 Heat Pump ....................11 Specifications...

  • Page 18: Specifications

    Specifications SiUS041501E 1. Specifications Cooling Only 60 Hz, 208 - 230 V Indoor Unit FTKN09NMVJU FTKN12NMVJU Model Outdoor Unit RKN09NMVJU RKN12NMVJU 2.64 (1.30 ~ 3.00) 3.52 (1.30 ~ 3.80) Capacity Btu/h 9,000 (4,400 ~ 10,200) 12,000 (4,400 ~ 13,000) Rated (Min. ~ Max.)
  • Page 19 SiUS041501E Specifications 60 Hz, 208 - 230 V Indoor Unit FTKN18NMVJU FTKN24NMVJU Model Outdoor Unit RKN18NMVJU RKN24NMVJU 5.02 (1.30 ~ 5.28) 6.45 (1.50 ~ 6.74) Capacity Btu/h 17,100 (4,400 ~ 18,000) 22,000 (5,100 ~ 23,000) Rated (Min. ~ Max.) kcal/h 4,320 (1,120 ~ 4,540) 5,550 (1,290 ~ 5,800) Moisture Removal...
  • Page 20 Specifications SiUS041501E 60 Hz, 208 - 230 V Indoor Unit FTK09NMVJU FTK12NMVJU Model Outdoor Unit RK09NMVJU RK12NMVJU 2.64 (1.30 ~ 3.00) 3.20 (1.30 ~ 3.90) Capacity Btu/h 9,000 (4,400 ~ 10,200) 10,900 (4,400 ~ 13,300) Rated (Min. ~ Max.) kcal/h 2,270 (1,120 ~ 2,580) 2,750 (1,120 ~ 3,350) Moisture Removal...
  • Page 21 SiUS041501E Specifications 60 Hz, 208 - 230 V Indoor Unit FTK18NMVJU FTK24NMVJU Model Outdoor Unit RK18NMVJU RK24NMVJU 5.28 (1.60 ~ 5.86) 6.20 (1.60 ~ 7.03) Capacity Btu/h 18,000 (5,500 ~ 20,000) 21,200 (5,500 ~ 24,000) Rated (Min. ~ Max.) kcal/h 4,540 (1,380 ~ 5,040) 5,330 (1,380 ~ 6,050) Moisture Removal...

  • Page 22: Heat Pump

    Specifications SiUS041501E Heat Pump 60 Hz, 208 - 230 V Indoor Unit FTXN09NMVJU FTXN12NMVJU Model RXN09NMVJU RXN12NMVJU Outdoor Unit Cooling Heating Cooling Heating 2.64 (1.30 ~ 3.00) 2.64 (1.30 ~ 2.93) 3.52 (1.30 ~ 3.80) 3.52 (1.30 ~ 4.10) Capacity Btu/h 9,000 (4,400 ~ 10,200) 9,000 (4,400 ~ 10,000)
  • Page 23 SiUS041501E Specifications 60 Hz, 208 - 230V Indoor Unit FTXN18NMVJU FTXN24NMVJU Model RXN18NMVJU RXN24NMVJU Outdoor Unit Cooling Heating Cooling Heating 5.02 (1.50 ~ 5.28) 5.28 (1.50 ~ 5.60) 6.45 (1.50 ~ 6.74) 6.45 (1.50 ~ 7.44) Capacity Btu/h 17,100 (5,100 ~ 18,000) 18,000 (5,100 ~ 19,100) 22,000 (5,100 ~ 23,000) 22,000 (5,100 ~ 25,400)
  • Page 24 Specifications SiUS041501E 60 Hz, 208 - 230V Indoor Unit FTX09NMVJU FTX12NMVJU Model RX09NMVJU RX12NMVJU Outdoor Unit Cooling Heating Cooling Heating 2.64 (1.30 ~ 3.00) 2.93 (1.30 ~ 3.80) 3.20 (1.30 ~ 3.90) 3.96 (1.30 ~ 4.80) Capacity Btu/h 9,000 (4,400 ~ 10,200) 10,000 (4,400 ~ 13,000) 10,900 (4,400 ~ 13,300) 13,500 (4,400 ~ 16,400)
  • Page 25 SiUS041501E Specifications 60 Hz, 208 - 230V Indoor Unit FTX18NMVJU FTX24NMVJU Model RX18NMVJU RX24NMVJU Outdoor Unit Cooling Heating Cooling Heating 5.28 (1.60 ~ 5.86) 6.33 (1.60 ~ 7.03) 6.20 (1.60 ~ 7.03) 7.03 (1.70 ~ 8.10) Capacity Btu/h 18,000 (5,500 ~ 20,000) 21,600 (5,500 ~ 24,000) 21,200 (5,500 ~ 24,000) 24,000 (5,800 ~ 27,600)

  • Page 26: Part 3 Printed Circuit Board Connector Wiring Diagram

    SiUS041501E Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit....................16 1.1 09/12 Class ....................16 1.2 18/24 Class ....................18 2. Outdoor Unit....................20 2.1 09/12 Class, RKN18NMVJU ..............20 2.2 RXN18NMVJU, RK(X)18NMVJU, 24 class ..........21 Printed Circuit Board Connector Wiring Diagram...

  • Page 27: Indoor Unit

    SiUS041501E Indoor Unit 1. Indoor Unit 09/12 Class Control PCB (PCB1) 1) S6 Connector for swing motor (horizontal blade) 2) S26 Connector for display PCB 3) S32 Connector for indoor heat exchanger thermistor 4) S200 Connector for DC fan motor 5) H1, H2, H3, FG Connector for terminal board 6) FU1...
  • Page 28 Indoor Unit SiUS041501E Display PCB (PCB2) 1) S27 Connector for control PCB 2) SW1 (S1W) Forced cooling operation ON/OFF button ∗ Refer to page 103 for detail. 3) LED1 (H1P) LED for operation (green) 4) LED2 (H2P) LED for timer (yellow) 5) RTH1 (R1T) Room temperature thermistor LED2 LED1...

  • Page 29: 18/24 Class

    SiUS041501E Indoor Unit 18/24 Class Control PCB (PCB2) 1) S6 Connector for swing motor (horizontal blade) 2) S26 Connector for display PCB 3) S32 Connector for indoor heat exchanger thermistor 4) S200 Connector for DC fan motor 5) S900 Connector for filter PCB S200 S900 3P380931-1...
  • Page 30 Indoor Unit SiUS041501E Filter PCB (PCB1) 1) S100 Connector for terminal board 2) S800 Connector for control PCB 3) FG, HE Connector for ground 4) FU1 Fuse (3.15 A, 250 V) 5) V2 Varistor S800 S100 3P380932-1 Display PCB (PCB3) 1) S27 Connector for control PCB 2) SW1 (S1W)

  • Page 31: Outdoor Unit

    SiUS041501E Outdoor Unit 2. Outdoor Unit 09/12 Class, RKN18NMVJU Main PCB 1) S20 Connector for electronic expansion valve coil 2) S30 Connector for compressor 3) S40 Connector for overload protector 4) S71 Connector for DC fan motor 5) S80 Connector for four way valve coil (heat pump model only) 6) S90 Connector for thermistors (outdoor temperature, outdoor heat exchanger, discharge pipe)

  • Page 32: Rxn18Nmvju, Rk(X)18Nmvju, 24 Class

    Outdoor Unit SiUS041501E RXN18NMVJU, RK(X)18NMVJU, 24 class Main PCB 1) S20 Connector for electronic expansion valve coil 2) S40 Connector for overload protector 3) S70 Connector for DC fan motor 4) S80 Connector for four way valve coil (heat pump model only) 5) S90 Connector for thermistors (outdoor temperature, outdoor heat exchanger, discharge pipe)

  • Page 33: Part 4 Function And Control

    SiUS041501E Part 4 Function and Control 1. Main Functions..................23 1.1 Temperature Control .................. 23 1.2 Frequency Principle..................23 1.3 Airflow Direction Control................25 1.4 Fan Speed Control for Indoor Unit ............. 26 1.5 Program Dry Operation ................27 1.6 Automatic Operation................... 28 1.7 Thermostat Control..................

  • Page 34: Main Functions

    Main Functions SiUS041501E 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 Target temperature: temperature determined by microcomputer Target temperature Room thermistor temperature...
  • Page 35 SiUS041501E 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 36: Airflow Direction Control

    Main Functions SiUS041501E Airflow Direction Control Power-Airflow The large flap sends a large volume of air downward to the floor and provides an optimum control in cooling, dry, and heating operation. Flap <Cooling / Dry> During cooling or dry operation, the flap retracts into the indoor unit. Then, cool air can be blown far and distributed all over the room.

  • Page 37: Fan Speed Control For Indoor Unit

    SiUS041501E Main Functions Fan Speed Control for Indoor Unit Outline Phase control and fan speed control contains 9 steps: LLL, LL, SL, L, ML, M, MH, H, and HH. The airflow rate can be automatically controlled depending on the difference between the room thermistor temperature and the target temperature.

  • Page 38: Program Dry Operation

    Main Functions SiUS041501E Program Dry Operation Outline Program dry operation removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and airflow rate, the temperature adjustment and FAN setting buttons are inoperable. Detail The microcomputer automatically sets the temperature and airflow rate. The difference between the room thermistor temperature at start-up and the target temperature is divided into two zones.

  • Page 39: Automatic Operation

    SiUS041501E Main Functions Automatic Operation Outline Automatic Cooling / Heating Function When the automatic operation is selected with the remote controller, the microcomputer automatically determines the operation mode as cooling or heating according to the room temperature and the set temperature at start-up. The unit automatically switches the operation mode to maintain the room temperature at the set temperature.

  • Page 40: Thermostat Control

    Main Functions SiUS041501E Thermostat Control Outline Thermostat control is based on the difference between the room thermistor temperature and the target temperature. Detail Thermostat OFF Condition 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. The system resumes from defrost control in any zones except A.

  • Page 41: Night Set Mode

    SiUS041501E Main Functions NIGHT SET Mode Outline When the OFF TIMER is set, NIGHT SET Mode is automatically activated. NIGHT SET Mode keeps the airflow rate setting. Detail NIGHT SET Mode continues operation at the target temperature for the first one hour, then automatically raises the target temperature slightly in the case of cooling, or lowers it slightly in the case of heating.

  • Page 42: Inverter Powerful Operation

    Main Functions SiUS041501E 1.10 Inverter POWERFUL Operation Outline In order to exploit the cooling and heating capacity to full extent, the air conditioner can be operated by increasing the indoor fan rotating speed and the compressor frequency. Detail When POWERFUL button is pressed, the fan speed and target temperature are converted to the following states for 20 minutes.

  • Page 43: Other Functions

    SiUS041501E Main Functions 1.11 Other Functions 1.11.1 Hot-Start Function In order to prevent the cold air blast that normally occurs when heating operation starts, the temperature of the indoor heat exchanger is detected, and the airflow is either stopped or significantly weakened resulting in comfortable heating.

  • Page 44: Function Of Thermistor

    Function of Thermistor SiUS041501E 2. Function of Thermistor Electronic expansion valve Four way valve Compressor (R14247) (1) Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling the target discharge pipe temperature. The system sets the target discharge pipe temperature according to the outdoor Exchanger and indoor heat exchanger temperature, and controls the electronic expansion valve opening so Thermistor...

  • Page 45: Control Specification

    SiUS041501E Control Specification 3. Control Specification Mode Hierarchy Outline The air conditioner control has normal operation mode, forced operation mode, and power transistor test mode for installation and servicing. Detail Cooling Only Model Air conditioner control mode Forced operation mode Forced cooling operation (for pump down operation) Power transistor test mode Normal operation mode...

  • Page 46: Frequency Control

    Control Specification SiUS041501E 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 47 SiUS041501E Control Specification 2. Determine upper limit frequency The minimum value is set as an upper limit frequency among the frequency upper limits of the following functions: Compressor protection, input current, discharge pipe temperature, heating peak-cut, freeze-up protection, defrost control. 3.

  • Page 48: Controls At Mode Changing / Start-Up

    Control Specification SiUS041501E Controls at Mode Changing / Start-up 3.3.1 Preheating Operation Outline The inverter operation in open phase starts with the conditions of the outdoor temperature, the discharge pipe temperature, the radiation fin temperature and the preheating command from the indoor unit.

  • Page 49: Compressor Protection Function

    SiUS041501E Control Specification 3.3.3 Four Way Valve Operation Compensation Outline At the beginning of operation as the four way valve is switched, the pressure difference to activate the four way valve is acquired when the output frequency is higher than a certain fixed frequency, for a certain fixed time.

  • Page 50: Discharge Pipe Temperature Control

    Control Specification SiUS041501E 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.

  • Page 51: Input Current Control

    SiUS041501E Control Specification 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. In case of heat pump models, this control is the upper limit control of frequency and takes priority over the lower limit control of four way valve operation compensation.

  • Page 52: Freeze-Up Protection Control

    Control Specification SiUS041501E Freeze-up Protection Control During cooling operation, the signal sent from the indoor unit determines the frequency upper limit and prevents freezing of the indoor heat exchanger. (The signal from the indoor unit is divided into zones.) The operating frequency limitation is judged with the indoor heat exchanger temperature. Indoor heat exchanger (Reference) thermistor temperature...

  • Page 53: Outdoor Fan Control

    SiUS041501E 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 control during defrosting The outdoor fan is turned OFF during defrosting.

  • Page 54: Defrost Control

    Control Specification SiUS041501E 3.10 Defrost Control Outline Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than a certain value to finish defrosting. Detail Conditions for Starting Defrost The starting conditions are determined with the outdoor temperature and the outdoor heat exchanger temperature.

  • Page 55: Electronic Expansion Valve Control

    SiUS041501E Control Specification 3.11 Electronic Expansion Valve Control Outline The following items are included in the electronic expansion valve control. Electronic expansion valve is fully closed 1. Electronic expansion valve is fully closed when turning on the power. 2. Pressure equalizing control Open Control 1.

  • Page 56: Pressure Equalizing Control

    Control Specification SiUS041501E 3.11.1 Fully Closing with Power ON The electronic expansion valve is initialized when turning on the power. The opening position is set and the pressure is equalized. 3.11.2 Pressure Equalizing Control When the compressor is stopped, the pressure equalizing control is activated. The electronic expansion valve opens and the pressure is equalized.
  • Page 57 SiUS041501E Control Specification Discharge pipe temperature +6°C (+10.8°F) < outdoor heat exchanger temperature 2. When the operation mode is heating When the following condition is fulfilled, the discharge pipe thermistor disconnection is ascertained. Discharge pipe temperature +6°C (+10.8°F) < indoor heat exchanger temperature RXN18NMVJU 09/12 class RK(X)18NMVJU...

  • Page 58: Malfunctions

    Control Specification SiUS041501E 3.12 Malfunctions 3.12.1 Sensor Malfunction Detection Sensor malfunction can be detected in the following thermistor: 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Radiation fin thermistor 4. Outdoor temperature thermistor 3.12.2 Detection of Overcurrent and Overload Outline An excessive output current is detected and the OL temperature is observed to protect the compressor.

  • Page 59: Part 5 Remote Controller

    SiUS041501E Part 5 Remote Controller 1. Cooling Only....................49 2. Heat Pump ....................51 Remote Controller...

  • Page 60: Cooling Only

    FTKN-N Series ARC480A7 FTK-N Series ARC480A9 (R21662) Note: Refer to the operation manual of applicable model for detail. You can download operation manual from Daikin Business Portal: Daikin Business Portal → Product Information → Operation/Installation Manual (URL: https://global1d.daikin.com/business_portal/login/) Remote Controller...
  • Page 61 2 POWERFUL operation P.31 4 Auto-swing setting P.25 Note: Refer to the operation manual of applicable model for detail. You can download operation manual from Daikin Business Portal: Daikin Business Portal → Product Information → Operation/Installation Manual (URL: https://global1d.daikin.com/business_portal/login/) Remote Controller...

  • Page 62: Heat Pump

    Refer to the following pages for detail. 1 Automatic operation P.26 Note: Refer to the operation manual of applicable model for detail. You can download operation manual from Daikin Business Portal: Daikin Business Portal → Product Information → Operation/Installation Manual (URL: https://global1d.daikin.com/business_portal/login/) Remote Controller...
  • Page 63 3 POWERFUL operation P.31 5 Auto-swing setting P.25 Note: Refer to the operation manual of applicable model for detail. You can download operation manual from Daikin Business Portal: Daikin Business Portal → Product Information → Operation/Installation Manual (URL: https://global1d.daikin.com/business_portal/login/) Remote Controller...

  • Page 64: Part 6 Service Diagnosis

    SiUS041501E Part 6 Service Diagnosis 1. General Problem Symptoms and Check Items .........55 2. Troubleshooting with LED .................56 2.1 Indoor Unit....................56 2.2 Outdoor Unit ....................56 3. Service Diagnosis ..................57 4. Troubleshooting ..................60 4.1 Error Codes and Description ..............60 4.2 Indoor Unit PCB Abnormality ..............
  • Page 65 SiUS041501E 5.13 Power Module Check ................100 Service Diagnosis...

  • Page 66: General Problem Symptoms And Check Items

    General Problem Symptoms and Check Items SiUS041501E 1. General Problem Symptoms and Check Items Symptom Check Item Details Reference Page The unit does not operate. 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 with the —...

  • Page 67: Troubleshooting With Led

    SiUS041501E Troubleshooting with LED 2. Troubleshooting with LED Indoor Unit Operation Lamp The operation lamp blinks when any of the following errors is detected. 1. When a protection device of the indoor or outdoor unit is activated, or when the thermistor malfunctions.

  • Page 68: Service Diagnosis

    Service Diagnosis SiUS041501E 3. Service Diagnosis 1. When the TIMER CANCEL button is held down for 5 seconds, 00 is displayed on the Method 1 temperature display screen. TIMER CANCEL button <ARC480 Series> (R21665) 2. Press the TIMER CANCEL button repeatedly until a long beep sounds. The code indication changes in the sequence shown below.
  • Page 69 SiUS041501E Service Diagnosis Method 2 1. Press the center of the TEMP button and the OFF button at the same time. (R21666) is displayed on the LCD. (R21059) 2. Select 5C (service check) with the TEMP or TEMP button. 3. Press the FAN button to enter the service check mode. (R21667) is displayed and the left-side number blinks.
  • Page 70 Service Diagnosis SiUS041501E 5. Diagnose by the sound. beep: The left-side number does not correspond with the error code. two consecutive beeps: The left-side number corresponds with the error code but the right- side number does not. long beep: Both the left-side and right-side numbers correspond with the error code. (The numbers indicated when you hear the long beep are the error code.

  • Page 71: Troubleshooting

    SiUS041501E Troubleshooting 4. Troubleshooting Error Codes and Description Reference Error Codes Description Page System Normal — Low-voltage detection or over-voltage detection Signal transmission error (between indoor unit and outdoor unit) Unspecified voltage (between indoor unit and outdoor unit) Indoor Indoor unit PCB abnormality Unit Freeze-up protection control / heating peak-cut control Fan motor (DC motor) or related abnormality...

  • Page 72: Indoor Unit Pcb Abnormality

    Troubleshooting SiUS041501E Indoor Unit PCB Abnormality Error Code Method of Error The system checks if the circuit works properly within the microcomputer of the indoor unit. Detection Error Decision The system cannot set the internal settings. Conditions Supposed Wrong models interconnected Defective indoor unit PCB Causes Disconnection of connector...

  • Page 73: Freeze-Up Protection Control / Heating Peak-Cut Control

    SiUS041501E Troubleshooting Freeze-up Protection Control / Heating Peak-cut Control Error Code Method of Error Freeze-up protection control During cooling operation, the freeze-up protection control (operation halt) is activated according Detection to the temperature detected by the indoor heat exchanger thermistor. Heating peak-cut control During heating operation, the temperature detected by the indoor heat exchanger thermistor is used for the heating peak-cut control (operation halt, outdoor fan stop, etc.)

  • Page 74: Fan Motor (Dc Motor) Or Related Abnormality

    Troubleshooting SiUS041501E Fan Motor (DC Motor) or Related Abnormality Error Code Method of Error The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation. Detection 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 75 SiUS041501E Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Note: The motor may break when the Turn off the power supply. motor connector is disconnected Check No.03 (Unplug the power cable or turn with the power supply on.

  • Page 76: Thermistor Or Related Abnormality (Indoor Unit)

    Troubleshooting SiUS041501E Thermistor or Related Abnormality (Indoor Unit) C4 , C9 Error Code Method of Error The temperatures detected by the thermistors determine thermistor errors. Detection Error Decision The voltage between the both ends of the thermistor is 4.96 V and more or 0.04 V and less during compressor operation.

  • Page 77: Low-Voltage Detection Or Over-Voltage Detection

    SiUS041501E 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 over-voltage detection circuit. Error Decision Low-voltage detection: Conditions...
  • Page 78 Troubleshooting SiUS041501E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the power supply voltage. Is the voltage fluctuation Correct the power supply. within ±10% from the rated value? Check the connection of the compressor harness.

  • Page 79: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)

    SiUS041501E Troubleshooting Signal Transmission Error (between Indoor Unit and Outdoor Unit) Error Code Method of Error The data received from the outdoor unit in signal transmission 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 abnormal.
  • Page 80 Troubleshooting SiUS041501E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.11 Refer to P.93 Check the power supply voltage. Is the voltage fluctuation Correct the power supply. within ±10% from the rated value? Check the indoor unit - outdoor...

  • Page 81: Unspecified Voltage (Between Indoor Unit And Outdoor Unit)

    SiUS041501E Troubleshooting Unspecified Voltage (Between Indoor Unit and Outdoor Unit) 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.

  • Page 82: Outdoor Unit Pcb Abnormality

    Troubleshooting SiUS041501E Outdoor Unit PCB Abnormality Error Code Method of Error The system checks if the microprocessor is working in order. Detection The system checks if the zero-cross signal comes in properly. Error Decision The microprocessor program runs out of control. The zero-cross signal is not detected.

  • Page 83: Ol Activation (Compressor Overload)

    SiUS041501E Troubleshooting 4.10 OL Activation (Compressor Overload) Error Code 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 Supposed Disconnection of discharge pipe thermistor...
  • Page 84 Troubleshooting SiUS041501E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Refer to P.91 Discharge pipe thermistor Insert the thermistor in disconnected? position. Check No.12 Refer to P.93 Check No.

  • Page 85: Compressor Lock

    SiUS041501E Troubleshooting 4.11 Compressor Lock Error Code Method of Error A compressor lock is detected by the current waveform generated when applying high-frequency voltage to the motor. Detection Error Decision If the error repeats, the system is shut down. Conditions Reset condition: Continuous run for about 11 minutes without any other error Supposed Closed stop valve...

  • Page 86: Dc Fan Lock

    Troubleshooting SiUS041501E 4.12 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 15 ~ 30 seconds even when the fan motor is running. If the error repeats, the system is shut down.

  • Page 87: Input Overcurrent Detection

    SiUS041501E Troubleshooting 4.13 Input Overcurrent Detection Error Code Method of Error An input overcurrent is detected by checking the input current value with the compressor running. Detection Error Decision The current exceeds about 7.75 ~ 18.0 A (depending on the model and operation mode) for 2.5 seconds with the compressor running.

  • Page 88: Four Way Valve Abnormality

    Troubleshooting SiUS041501E 4.14 Four Way Valve Abnormality Error Code Method of Error The room temperature thermistor and the indoor heat exchanger thermistor are checked if they function within their normal ranges in each operation mode. Detection Error Decision A following condition continues over 10 minutes after operating for 5 minutes. Conditions Cooling / Dry A –...
  • Page 89 SiUS041501E Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Four way valve coil Refer to P.91 Correct the four way valve disconnected (loose)? coil. Check No.13 Refer to P.94 Harness disconnected? Reconnect the harness.

  • Page 90: Discharge Pipe Temperature Control

    Troubleshooting SiUS041501E 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, the compressor stops.

  • Page 91: High Pressure Control In Cooling

    SiUS041501E Troubleshooting 4.16 High Pressure Control in Cooling Error Code Method of Error High-pressure control (operation halt, frequency drop, etc.) is activated in cooling operation if the temperature sensed by the outdoor heat exchanger thermistor exceeds the limit. Detection Error Decision The temperature sensed by the outdoor heat exchanger thermistor rise above 59 ~ 62°C (138.2 ~ 143.6°F) (depending on the model).
  • Page 92 Troubleshooting SiUS041501E Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Check the installation space. Refer to P.91 Check No. 17 Check No.12 Change the installation Check the installation Refer to P.93 location or direction.

  • Page 93: Compressor System Sensor Abnormality

    SiUS041501E Troubleshooting 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 0.5 ~ 4.5 V.

  • Page 94: Position Sensor Abnormality

    Troubleshooting SiUS041501E 4.18 Position Sensor Abnormality Error Code Method of Error A compressor start-up failure is detected by checking the compressor running condition through the position detection circuit. Detection Error Decision If the error repeats, the system is shut down. Conditions Reset condition: Continuous run for about 11 minutes without any other error Supposed...
  • Page 95 SiUS041501E Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.15 Turn off the power. Refer to P.95 Check the power supply voltage. Check No.18 Refer to P.98 Voltage as rated? Correct the power supply.

  • Page 96: Thermistor Or Related Abnormality (Outdoor Unit)

    Troubleshooting SiUS041501E 4.19 Thermistor or Related Abnormality (Outdoor Unit) H9 , J3 , J6 , P4 Error Code Method of Error This fault is identified based on the thermistor input voltage to the microcomputer. A thermistor fault is identified based on the temperature sensed by each thermistor. Detection Error Decision The voltage between the both ends of the thermistor is above 4.96 V or below 0.04 V with the...
  • Page 97 SiUS041501E Troubleshooting In case of H9 , J3 , J6 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.01 Turn on the power again. Refer to P.91 Error displayed Reconnect the connectors again on remote...

  • Page 98: Electrical Box Temperature Rise

    Troubleshooting SiUS041501E 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 compressor off. Detection Error Decision With the compressor off, the radiation fin temperature is above A. Conditions The error is cleared when the radiation fin temperature drops below B.

  • Page 99: Radiation Fin Temperature Rise

    SiUS041501E Troubleshooting 4.21 Radiation Fin Temperature Rise Error Code Method of Error A radiation fin temperature rise is detected by checking the radiation fin thermistor with the compressor on. Detection Error Decision If the radiation fin temperature with the compressor on is above A. Conditions The error is cleared when the radiation fin temperature drops below B.

  • Page 100: Output Overcurrent Detection

    Troubleshooting SiUS041501E 4.22 Output Overcurrent Detection Error Code 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. Conditions A rotation speed error occurs while the compressor is running.
  • Page 101 SiUS041501E Troubleshooting Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. ∗ An output overcurrent may result from wrong internal wiring. If the system is interrupted by an output Check No.15 overcurrent after the wires have been disconnected and reconnected for part replacement, check the wiring again.

  • Page 102: Check

    Check SiUS041501E 5. Check Thermistor Resistance Check Check No.01 Disconnect the connectors of the thermistors from the PCB, and measure the resistance of each thermistor using multimeter. Thermistor temperature Resistance (kΩ) Room temperature °C °F Other thermistors thermistor –20 –4 73.4 197.8 –15...

  • Page 103: Fan Motor Connector Output Check

    SiUS041501E Check Fan Motor Connector Output Check Check No.03 Fan motor wire breakdown / short circuit check 1. Check the connector for connection. 2. Turn the power off. Ω Ω 3. Check if each resistance at the phases U - V and V - W is 90 ~ 100 (between the pins 12 - 9, and between 9 - 6).

  • Page 104: Power Supply Waveforms Check

    Check SiUS041501E Power Supply Waveforms Check Check No.11 Measure the power supply waveform between No. 1 and No. 2 on the terminal board, and check the waveform disturbance. Check if the power supply waveform is a sine wave (Fig.1). Check if there is waveform disturbance near the zero-cross (sections circled in Fig.2). Fig.1 Fig.2 Electronic Expansion Valve Check...

  • Page 105: Four Way Valve Performance Check

    SiUS041501E Check Four Way Valve Performance Check Check No.13 Turn the power off and then on again. ∗ Four way valve coil Start heating operation. Cooling / Dry / Defrost: Not energized Heating: energized voltage at 208 - 230 Replace the outdoor unit VAC with compressor PCB (main PCB).

  • Page 106: Inverter Analyzer Check

    Check SiUS041501E Inverter Analyzer Check Check No.15 Characteristics Inverter analyzer: RSUK0917C If an abnormal stop occurs due to compressor startup failure or overcurrent output when using an inverter unit, it is difficult to judge whether the stop is caused by the compressor failure or some other failure (main PCB, power module, etc.).
  • Page 107 SiUS041501E Check Step 3 Activate power transistor test operation from the indoor unit. (1) Turn the power on. (2) Press the center of the TEMP button and the OFF button on the remote controller at the same time. (3) Select T with the TEMP or TEMP button.

  • Page 108: Rotation Pulse Check On The Outdoor Unit Pcb

    Check SiUS041501E Rotation Pulse Check on the Outdoor Unit PCB Check No.16 Make sure that the voltage of 320 + 100 V ~ 320 - 50 V is applied. 1. Set operation off and power off. Disconnect the connector S70 or S71. 2.

  • Page 109: Installation Condition Check

    SiUS041501E Check Installation Condition Check Check No.17 Installation condition check Check the allowable dimensions of the air Change the installation suction and location or direction. discharge area. Is the discharged air Change the installation short-circuited? location or direction. Is the outdoor heat Clean the outdoor heat exchanger very dirty? exchanger.

  • Page 110: Outdoor Fan System Check

    Check SiUS041501E 5.11 Outdoor Fan System Check Check No.19 DC motor Check the outdoor fan system. Fan motor Is the lead wire connector outdoor fan running? Go to Check No. 16. disconnected? Reconnect the connector. Outdoor fan system is functioning. (R21195) 5.12 Main Circuit Short Check Check No.20...

  • Page 111: Power Module Check

    SiUS041501E Check RXN18NMVJU, RK(X)18NMVJU, 24 class Multimeter (R20701) 5.13 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 112 Check SiUS041501E 09/12 class, RKN18NMVJU Pin 24: + Pin 23: U Pin 22: V Pin 21: W Pin 20: – (R20703) RXN18NMVJU, RK(X)18NMVJU, 24 class DC_P1: + (R20704) DC_N1: – Service Diagnosis...

  • Page 113: Part 7 Trial Operation And Field Settings

    SiUS041501E Part 7 Trial Operation and Field Settings 1. Tips for Servicing ..................103 1.1 Pump Down Operation ................103 1.2 Forced Cooling Operation ................ 103 2. Trial Operation ..................104 3. Field Settings ..................105 3.1 Temperature Display Switch ..............105 3.2 When 2 Units are Installed in 1 Room............106 3.3 Facility Setting Switch (cooling at low outdoor temperature) (Only for RK(X) series) ................

  • Page 114: Tips For Servicing

    Tips for Servicing SiUS041501E 1. Tips for Servicing Pump Down Operation Outline In order to protect the environment, be sure to conduct pump down operation when relocating or disposing of the unit. Detail 1. Remove the valve caps from the liquid stop valve and the gas stop valve. 2.

  • Page 115: Trial Operation

    SiUS041501E Trial Operation 2. Trial Operation Outline Carry out the trial operation in accordance with the operation manual to ensure that all functions and parts, such as flap movement, are working properly. Trial operation should be carried out in either cooling or heating operation. Detail 1.

  • Page 116: Field Settings

    Field Settings SiUS041501E 3. Field Settings Temperature Display Switch You can select Fahrenheit or Celsius for temperature display. Press the TEMP and ON TIMER buttons simultaneously for 5 seconds to change the unit of temperature display. You can also change the unit of temperature display by pressing the TEMP buttons simultaneously for 5 seconds.

  • Page 117: When 2 Units Are Installed In 1 Room

    SiUS041501E Field Settings When 2 Units are Installed in 1 Room Outline When 2 indoor units are installed in 1 room, 1 of the 2 indoor units and the corresponding wireless remote controller can be set for different addresses. Procedure (1) Remove the battery cover of the remote controller.

  • Page 118: Facility Setting Switch (Cooling At Low Outdoor Temperature) (Only For Rk(X) Series)

    Field Settings SiUS041501E Facility Setting Switch (cooling at low outdoor temperature) (Only for RK(X) series) Outline This function is limited to use for facilities (where the target of air conditioning is equipment, such as in a server room). Never use it in a residence or office where there are people present. Detail You can expand the operation range to –15°C (5°F) by cutting the jumper on the outdoor unit PCB.

  • Page 119: Silicon Grease On Power Transistor / Diode Bridge

    SiUS041501E Silicon Grease on Power Transistor / Diode Bridge 4. Silicon Grease on Power Transistor / Diode Bridge Outline Apply the specified silicon grease to the heat radiation part of a power transistor / diode bridge when you replace an outdoor unit PCB. The silicon grease encourages the heat radiation of a power transistor / diode bridge.

  • Page 120: Part 8 Appendix

    SiUS041501E Part 8 Appendix 1. Piping Diagrams..................110 1.1 Indoor unit ....................110 1.2 Outdoor Unit ..................... 112 2. Wiring Diagrams..................118 2.1 Indoor Unit....................118 2.2 Outdoor Unit ..................... 119 Appendix...

  • Page 121: Piping Diagrams

    SiUS041501E Piping Diagrams 1. Piping Diagrams Indoor unit 1.1.1 Cooling Only FTKN09NMVJU FTKN12NMVJU, FTK09/12NMVJU INDOOR UNIT INDOOR UNIT HEAT EXCHANGER HEAT EXCHANGER THERMISTOR THERMISTOR ON HEAT EXCH. ON HEAT EXCH. FIELD PIPING CROSS FLOW FAN FIELD PIPING CROSS FLOW FAN...
  • Page 122 Piping Diagrams SiUS041501E 1.1.2 Heat Pump FTXN09NMVJU FTXN12NMVJU, FTX09/12NMVJU INDOOR UNIT INDOOR UNIT HEAT EXCHANGER HEAT EXCHANGER THERMISTOR THERMISTOR ON HEAT EXCH. ON HEAT EXCH. FIELD PIPING CROSS FLOW FAN FIELD PIPING CROSS FLOW FAN ( 1/4 CuT ) ( 1/4 CuT ) SINGLE UNION SINGLE UNION JOINT...

  • Page 123: Outdoor Unit

    SiUS041501E Piping Diagrams Outdoor Unit 1.2.1 Cooling Only RKN09NMVJU, RK09NMVJU OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER THERMISTOR 9/32 CuT 9/32 CuT HEAT EXCHANGER THERMISTOR 1/4 CuT 1/4 CuT 9/32 CuT MUFFLER WITH MOTOR FILTER OPERATED PROPELLER FAN VALVE MUFFLER WITH 3/8 CuT FILTER FOUR WAY...
  • Page 124 Piping Diagrams SiUS041501E RKN18NMVJU OUTDOOR UNIT HEAT EXCHANGER OUTDOOR AIR 9/32 CuT THERMISTOR 9/32 CuT 9/32 CuT 9/32 CuT CAPILLARY TUBE 1 5/32 CuT 1/4 CuT CAPILLARY TUBE 2 REFRIGERANT FLOW 5/32 CuT COOLING HEAT EXCHANGER THERMISTOR MUFFLER WITH PROPELLER FAN FILTER ELECTRONIC EXPANSION...
  • Page 125 SiUS041501E Piping Diagrams RKN24NMVJU OUTDOOR UNIT HEAT EXCHANGER OUTDOOR AIR 9/32 CuT THERMISTOR 9/32 CuT 9/32 CuT CAPILLARY TUBE 1 9/32 CuT 5/32 CuT 1/4 CuT 1/4 CuT REFRIGERANT FLOW CAPILLARY TUBE 2 5/32 CuT COOLING MUFFLER WITH FILTER HEAT EXCHANGER THERMISTOR ELECTRONIC EXPANSION...
  • Page 126 Piping Diagrams SiUS041501E 1.2.2 Heat Pump RXN09NMVJU, RX09NMVJU OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER THERMISTOR 9/32 CuT 9/32 CuT HEAT EXCHANGER THERMISTOR 1/4 CuT 1/4 CuT 9/32 CuT MUFFLER WITH MOTOR FILTER OPERATED PROPELLER FAN VALVE MUFFLER WITH 3/8 CuT FILTER FOUR WAY VALVE...
  • Page 127 SiUS041501E Piping Diagrams RXN18NMVJU, RX18NMVJU OUTDOOR UNIT HEAT EXCHANGER OUTDOOR AIR 9/32 CuT THERMISTOR 9/32 CuT 9/32 CuT CAPILLARY TUBE 1 9/32 CuT 5/32 CuT 1/4 CuT 1/4 CuT CAPILLARY TUBE 2 REFRIGERANT FLOW 5/32 CuT COOLING MUFFLER HEATING WITH FILTER HEAT EXCHANGER THERMISTOR...
  • Page 128 Piping Diagrams SiUS041501E RX24NMVJU OUTDOOR UNIT HEAT EXCHANGER OUTDOOR AIR 9/32 CuT THERMISTOR 9/32 CuT CAPILLARY TUBE 1 9/32 CuT 5/32 CuT 9/32 CuT CAPILLARY TUBE 2 5/32 CuT 1/4 CuT 1/4 CuT 9/32 CuT REFRIGERANT FLOW CAPILLARY TUBE 3 COOLING 9/32 CuT 5/32 CuT...

  • Page 129: Wiring Diagrams

    SiUS041501E Wiring Diagrams 2. Wiring Diagrams Indoor Unit FTK(X)N09/12NMVJU, FTK(X)09/12NMVJU PCB2 PCB1 FIELD WIRING. MR10 LED1 TRANSMISSION GRN/YLW CIRCUIT MR10 LED2 OUTDOOR RECTIFIER t˚ FU1 3.15A SIGNAL RECEIVER CAUTION IPM200 NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK S403 ON AGAIN.

  • Page 130: Outdoor Unit

    Wiring Diagrams SiUS041501E Outdoor Unit RK(X)N09/12NMVJU, RK(X)09/12NMVJU IPM1 MRM10 L2 2 HN1 V2 C400 INDOOR C405 MR30 V150 3.15A 3.15A POWER SUPPLY MRCW FIELD WIRING. OUTDOOR PCB1 NOTE 1. REFER TO THE NAME PLATE FOR THE POWER t˚ t˚ t˚ IN CASE OF REQUIREMENTS.
  • Page 131 SiUS041501E Wiring Diagrams RXN18NMVJU, RK(X)N24NMVJU, RK(X)18/24NMVJU FIELD WIRING INDOOR MRM20 IPM1 TO INDOOR UNIT L1 1 MRM10 3.15A 3.15A MR30 W V U POWER SUPPLY MRCW X11A OUTDOOR NOTE 1.REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS. t˚ t˚ t˚ : CAPACITOR : DIODE BRIDGE IN CASE OF...
  • Page 132 Revision History Month / Year Version Revised contents 03 / 2015 SiUS041501E First edition...
  • Page 133 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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