Daikin FTX09NMVJU Service Manual
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Daikin FTX09NMVJU Service Manual

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See also: Operating Manual , Installation Manual
Service
Manual
Inverter Pair
Wall Mounted Type FTX-N Series
Floor Standing Type FVXS-N Series
[Applied Models]
Inverter Pair : Heat Pump
SiUS091601E

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Summary of Contents for Daikin FTX09NMVJU

  • Page 1 SiUS091601E Service Manual Inverter Pair Wall Mounted Type FTX-N Series Floor Standing Type FVXS-N Series [Applied Models] Inverter Pair : Heat Pump...
  • Page 2 SiUS091601E Inverter Pair Wall Mounted Type FTX-N Series Floor Standing Type FVXS-N Series Heat Pump Indoor Unit FTX09NMVJU FVXS09NVJU FTX12NMVJU FVXS12NVJU FTX15NMVJU FVXS15NVJU Outdoor Unit RXL09QMVJU RXL12QMVJU RXL15QMVJU Table of Contents...

  • Page 3: Table Of Contents

    SiUS091601E 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. Icons Used ....................x Part 1 List of Functions ..............1 1. Functions..................... 2 Part 2 Specifications ............... 4 1.
  • Page 4 SiUS091601E 3.8 Outdoor Fan Control................... 48 3.9 Liquid Compression Protection Function............ 48 3.10 Defrost Control ................... 49 3.11 Electronic Expansion Valve Control ............50 3.12 Malfunctions ....................53 Part 5 Remote Controller ............... 54 1. FTX Series ....................55 2. FVXS Series....................57 Part 6 Service Diagnosis..............
  • Page 5 SiUS091601E 5.5 Four Way Valve Performance Check ............104 5.6 Inverter Unit Refrigerant System Check........... 104 5.7 Inverter Analyzer Check ................105 5.8 Rotation Pulse Check on the Outdoor Unit PCB ........107 5.9 Installation Condition Check..............108 5.10 Discharge Pressure Check............... 108 5.11 Outdoor Fan System Check ..............

  • Page 6: Safety Cautions

    Safety Cautions SiUS091601E 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 SiUS091601E 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 8: Warnings And Cautions Regarding Safety Of Users

    Safety Cautions SiUS091601E 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. Conduct welding work in a well-ventilated place. Using a welder in an enclosed room may cause oxygen deficiency.
  • Page 9 SiUS091601E 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 SiUS091601E 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: Icons Used

    SiUS091601E Icons Used 2. Icons Used 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

    SiUS091601E Part 1 List of Functions 1. Functions..................... 2 List of Functions...

  • Page 13: Functions

    SiUS091601E Functions 1. Functions Category Functions Category Functions Basic Inverter (with inverter power control) Health & Air-purifying filter — — Functions Cleanliness 10 ~ 10 ~ Photocatalytic deodorizing filter — — Operation limit for cooling (°CDB) Air-purifying filter with photocatalytic —...
  • Page 14 Functions SiUS091601E Category Functions Category Functions Basic Inverter (with inverter power control) Health & Air-purifying filter — Functions Cleanliness Operation limit for cooling (°CDB) 10 ~ 46 Photocatalytic deodorizing filter — Air-purifying filter with photocatalytic Operation limit for cooling (°FDB) 50 ~ 114.8 —...

  • Page 15: Part 2 Specifications

    SiUS091601E Part 2 Specifications 1. Specifications ....................5 Specifications...

  • Page 16: Specifications

    Specifications SiUS091601E 1. Specifications 60 Hz, 208 - 230V Indoor Unit FTX09NMVJU FTX12NMVJU Model RXL09QMVJU RXL12QMVJU Outdoor Unit Cooling Heating Cooling Heating 2.64 (1.30 ~ 3.20) 3.20 (1.30 ~ 4.70) 3.20 (1.30 ~ 3.90) 4.00 (1.30 ~ 5.50) Capacity Btu/h...
  • Page 17 SiUS091601E Specifications 60 Hz, 208 - 230V Indoor Unit FTX15NMVJU Model RXL15QMVJU Outdoor Unit Cooling Heating 4.40 (1.70 ~ 5.40) 5.35 (1.70 ~ 7.20) Capacity Btu/h 15,000 (5,800 ~ 18,400) 18,300 (5,800 ~ 24,600) Rated (Min. ~ Max.) kcal/h 3,780 (1,460 ~ 4,640) 4,600 (1,460 ~ 6,190) Moisture Removal gal/h...
  • Page 18 Specifications SiUS091601E 60 Hz, 208 - 230V Indoor Unit FVXS09NVJU FVXS12NVJU Model RXL09QMVJU RXL12QMVJU Outdoor Unit Cooling Heating Cooling Heating 2.64 (1.30 ~ 3.00) 2.95 (1.30 ~ 4.20) 3.00 (1.30 ~ 3.60) 3.80 (1.30 ~ 5.00) Capacity Btu/h 9,000 (4,400 ~ 10,200) 10,100 (4,400 ~ 14,300) 10,200 (4,400 ~ 12,300) 13,000 (4,400 ~ 17,100)
  • Page 19 SiUS091601E Specifications 60 Hz, 208 - 230V Indoor Unit FVXS15NVJU Model RXL15QMVJU Outdoor Unit Cooling Heating 4.40 (1.70 ~ 5.00) 5.28 (1.70 ~ 7.00) Capacity Btu/h 15,000 (5,800 ~ 17,100) 18,000 (5,800 ~ 24,000) Rated (Min. ~ Max.) kcal/h 3,780 (1,460 ~ 4,300) 4,540 (1,460 ~ 6,020) Moisture Removal gal/h...

  • Page 20: Part 3 Printed Circuit Board Connector Wiring Diagram

    SiUS091601E Part 3 Printed Circuit Board Connector Wiring Diagram 1. Indoor Unit....................10 1.1 FTX09/12NMVJU ..................10 1.2 FTX15NMVJU .................... 12 1.3 FVXS09/12/15NVJU................... 14 2. Outdoor Unit....................16 2.1 RXL09QMVJU.................... 16 2.2 RXL12QMVJU.................... 17 2.3 RXL15QMVJU.................... 18 Printed Circuit Board Connector Wiring Diagram...

  • Page 21: Indoor Unit

    SiUS091601E Indoor Unit 1. Indoor Unit FTX09/12NMVJU 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 Fuse (3.15 A, 250 V)
  • Page 22 Indoor Unit SiUS091601E Display PCB (PCB2) 1) S27 Connector for control PCB 2) SW1 (S1W) Forced cooling operation ON/OFF button ∗ Refer to page 115 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 23: Ftx15Nmvju

    SiUS091601E Indoor Unit FTX15NMVJU 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 24 Indoor Unit SiUS091601E 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 25: Fvxs09/12/15Nvju

    SiUS091601E Indoor Unit FVXS09/12/15NVJU Control PCB (PCB2) 1) S1 Connector for fan motor 2) S21 Connector for centralized control (HA) 3) S26 Connector for service PCB 4) S32 Indoor heat exchanger thermistor 5) S41 Connector for lower air outlet motor 6) S42 Connector for swing motor 7) S46...
  • Page 26 Indoor Unit SiUS091601E Sensor PCB (PCB1) 1) S49 Connector for control PCB 2) RTH2 (R1T) Room temperature thermistor RTH2 3P191450-1 Service PCB (PCB3) 1) S27 Connector for control PCB 2) SW2 (S2W)-4 Switch for upward airflow limit setting ∗ Refer to page 121 for detail. ∗...

  • Page 27: Outdoor Unit

    SiUS091601E Outdoor Unit 2. Outdoor Unit RXL09QMVJU Main PCB (PCB1) 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 6) S90 Connector for thermistors (outdoor temperature, outdoor heat exchanger, discharge pipe)

  • Page 28: Rxl12Qmvju

    Outdoor Unit SiUS091601E RXL12QMVJU 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 5) S90 Connector for thermistors (outdoor temperature, outdoor heat exchanger, discharge pipe) 6) HL1, HN1, S Connector for terminal board...

  • Page 29: Rxl15Qmvju

    SiUS091601E Outdoor Unit RXL15QMVJU 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 5) S90 Connector for thermistors (outdoor temperature, outdoor heat exchanger, discharge pipe) 6) HL1, HN1, S Connector for terminal board...

  • Page 30: Part 4 Functions And Control

    SiUS091601E Part 4 Functions and Control 1. Main Functions..................20 1.1 Temperature Control .................. 20 1.2 Frequency Principle..................20 1.3 Airflow Direction Control................22 1.4 Fan Speed Control for Indoor Unit ............. 25 1.5 Program Dry Operation ................26 1.6 Automatic Operation................... 27 1.7 Thermostat Control..................

  • Page 31: Main Functions

    SiUS091601E Main Functions 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 32 Main Functions SiUS091601E 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 33: Airflow Direction Control

    SiUS091601E Main Functions 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. (Dual) Flap (s) 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 34 Main Functions SiUS091601E COMFORT FTX Series The flap is controlled not to blow the air directly at the people in the room. AIRFLOW Operation Cooling Heating 09/12 class 0˚ (R21186) 65˚ (R21187) 15 class 10˚ (R21861) Airflow Selection FVXS Series Airflow direction can be set with the airflow selection switch.
  • Page 35 SiUS091601E Main Functions When setting the airflow selection switch to Air conditioner automatically decides the appropriate blowing pattern depending on the operating mode/situation. Operating mode Situation Blowing pattern When the operation is activated or Air is blown from the upper and when the room is not fully cooled.

  • Page 36: Fan Speed Control For Indoor Unit

    Main Functions SiUS091601E 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 37: Program Dry Operation

    SiUS091601E Main Functions 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 38: Automatic Operation

    Main Functions SiUS091601E 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 39: Thermostat Control

    SiUS091601E Main Functions 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 40: Night Set Mode

    Main Functions SiUS091601E 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 41: Inverter Powerful Operation

    SiUS091601E Main Functions 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 42: Clock Setting

    Main Functions SiUS091601E 1.11 Clock setting ARC466 Series The clock can be set by taking the following steps: 1. Press Clock button. → is displayed and MON and blink. 2. Press Select or Select button to set the clock to the current day of the week. 3.

  • Page 43: Weekly Timer Operation (Fvxs Series)

    SiUS091601E Main Functions 1.12 WEEKLY TIMER Operation (FVXS Series) Outline Up to 4 timer settings can be saved for each day of the week (up to 28 settings in total). The 3 items: ON/OFF, temperature, and time can be set. Detail Setting example of the WEEKLY TIMER The same timer settings are used from Monday through Friday, while different timer settings are used for the weekend.
  • Page 44 Main Functions SiUS091601E To use WEEKLY TIMER operation Setting mode • Make sure the day of the week and time are set. If not, set the day of the week and time. program 1 program 2 program 3 program 4 [Monday] 77˚F (25˚C) 81˚F (27˚C)

  • Page 45: Functions And Control

    SiUS091601E Main Functions Press to select the desired time. • The time can be set between 0:00 and 23:50 in 10-minute intervals. • To return to the ON/OFF TIMER mode setting, press • Proceed to STEP when setting the OFF TIMER. Press •...
  • Page 46 Main Functions SiUS091601E Copy mode • A reservation made once can be copied to another day of the week. The whole reservation of the selected day of the week will be copied. program 1 program 2 program 3 program 4 [Monday] 77˚F (25˚C) 81˚F (27˚C)
  • Page 47 SiUS091601E Main Functions Confirming a reservation • The reservation can be confirmed. Setting Displays Normal Confirmation Press • The day of the week and the reservation number of the current day will be displayed. Press to select the day of the week and the reservation number to be confirmed.
  • Page 48 Main Functions SiUS091601E To delete reservations An individual reservation Press • The day of the week and the reservation number will be displayed. Press to select the day of the week and the reservation number to be deleted. Press • “ ”...

  • Page 49: Other Functions

    SiUS091601E Main Functions 1.13 Other Functions 1.13.1 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 50: Thermistor Functions

    Thermistor Functions SiUS091601E 2. Thermistor Functions 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 51: Control Specification

    SiUS091601E 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 Heat Pump Model Air conditioner control mode Forced operation mode Forced cooling operation (for pump down operation) Power transistor test mode Normal operation mode...

  • Page 52: Frequency Control

    Control Specification SiUS091601E 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 53 SiUS091601E Control Specification When starting the compressor, the frequency is initialized according to the ∆D value of the indoor Initial Frequency unit. ∆D signal: Indoor frequency command The difference between the room thermistor temperature and the target temperature is taken as the ∆D value and is used for ∆D signal of frequency command.

  • Page 54: Controls At Mode Changing / Start-Up

    Control Specification SiUS091601E Controls at Mode Changing / Start-up 3.3.1 Preheating Control 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 55: Compressor Protection Function

    SiUS091601E 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 56: Discharge Pipe Temperature Control

    Control Specification SiUS091601E 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 57: Input Current Control

    SiUS091601E 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 58: Freeze-Up Protection Control

    Control Specification SiUS091601E 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 59: Outdoor Fan Control

    SiUS091601E 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 60: Defrost Control

    Control Specification SiUS091601E 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 61: Electronic Expansion Valve Control

    SiUS091601E 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 62: Pressure Equalizing Control

    Control Specification SiUS091601E 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 63 SiUS091601E Control Specification 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 A (seconds) 09/12 class 15 class Other than below Heating (when outdoor temperature 1200...

  • Page 64: Malfunctions

    Control Specification SiUS091601E 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 65: Part 5 Remote Controller

    SiUS091601E Part 5 Remote Controller 1. FTX Series ....................55 2. FVXS Series....................57 Remote Controller...

  • Page 66: Ftx Series

    1 Automatic operation P.25 Note: Refer to the operation manual of applicable model for details. You can download operation manuals from Daikin Business Portal: Daikin Business Portal → Document Search → Item Category → Installation/Operation Manual (URL: https://global1d.daikin.com/business_portal/login/) Remote Controller...
  • Page 67 P.30 5 Auto-swing P.22 Note: Refer to the operation manual of applicable model for details. You can download operation manuals from Daikin Business Portal: Daikin Business Portal → Document Search → Item Category → Installation/Operation Manual (URL: https://global1d.daikin.com/business_portal/login/) Remote Controller...

  • Page 68: Fvxs Series

    1 Inverter POWERFUL operation P.30 Note: Refer to the operation manual of applicable model for details. You can download operation manuals from Daikin Business Portal: Daikin Business Portal → Document Search → Item Category → Installation/Operation Manual (URL: https://global1d.daikin.com/business_portal/login/) Remote Controller...

  • Page 69: Mode Button

    5 Clock setting P.31 Note: Refer to the operation manual of applicable model for details. You can download operation manuals from Daikin Business Portal: Daikin Business Portal → Document Search → Item Category → Installation/Operation Manual (URL: https://global1d.daikin.com/business_portal/login/) Remote Controller...

  • Page 70: Part 6 Service Diagnosis

    SiUS091601E Part 6 Service Diagnosis 1. General Problem Symptoms and Check Items .........61 2. Troubleshooting with LED .................62 2.1 Indoor Unit....................62 2.2 Outdoor Unit ....................62 3. Service Diagnosis ..................63 3.1 ARC480 Series................... 63 3.2 ARC466 Series................... 66 4. Troubleshooting ..................69 4.1 Error Codes and Description ..............
  • Page 71 SiUS091601E 5.11 Outdoor Fan System Check ..............109 5.12 Main Circuit Short Check................109 5.13 Power Module Check ................111 Service Diagnosis...

  • Page 72: General Problem Symptoms And Check Items

    General Problem Symptoms and Check Items SiUS091601E 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 73: Troubleshooting With Led

    SiUS091601E 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 74: Service Diagnosis

    Service Diagnosis SiUS091601E 3. Service Diagnosis ARC480 Series 1. When TIMER CANCEL button is held down for 5 seconds, 00 is displayed on the temperature Method 1 display screen. TIMER CANCEL button <ARC480 Series> (R21665) 2. Press TIMER CANCEL button repeatedly until a long beep sounds. The code indication changes in the sequence shown below.
  • Page 75 SiUS091601E Service Diagnosis Method 2 1. Press the center of TEMP button and OFF button at the same time. (R21666) is displayed on the LCD. (R21059) 2. Select 5C (service check) with TEMP or TEMP button. 3. Press FAN button to enter the service check mode. (R21667) is displayed and the left-side number blinks.
  • Page 76 Service Diagnosis SiUS091601E 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 77: Arc466 Series

    SiUS091601E Service Diagnosis ARC466 Series 1. When Timer Cancel button is held down for 5 seconds, 00 is displayed on the temperature Method 1 display screen. Timer Cancel button (R23004) < ARC466 Series > 2. Press Timer Cancel button repeatedly until a long beep sounds. The code indication changes in the sequence shown below.
  • Page 78 Service Diagnosis SiUS091601E Method 2 1. Press the center of Temp button and Mode button at the same time. (R11669) is displayed on the LCD. (R11821) 2. Select 5C (service check) with Temp or Temp button. 3. Press Mode button to enter the service check mode. (R11672) The left-side number blinks.
  • Page 79 SiUS091601E Service Diagnosis 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 80: Troubleshooting

    Troubleshooting SiUS091601E 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 81: Indoor Unit Pcb Abnormality

    SiUS091601E Troubleshooting 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 82: Freeze-Up Protection Control / Heating Peak-Cut Control

    Troubleshooting SiUS091601E 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 83: Fan Motor (Dc Motor) Or Related Abnormality

    SiUS091601E Troubleshooting 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 84 Troubleshooting SiUS091601E Troubleshooting FTX Series 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 Check No.03 Turn off the power supply. motor connector is disconnected Refer to P.102 (Unplug the power cable or turn with the power supply on.
  • Page 85 SiUS091601E Troubleshooting FVXS Series Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check No.02 Check the power supply Refer to P.102 voltage. Is the voltage fluctuation Correct the power within ±10% from supply.

  • Page 86: Thermistor Or Related Abnormality (Indoor Unit)

    Troubleshooting SiUS091601E 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 87: Low-Voltage Detection Or Over-Voltage Detection

    SiUS091601E 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: The voltage detected by the DC voltage detection circuit is below 180 ~ 196 V (depending on...
  • Page 88 Troubleshooting SiUS091601E 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 89: Signal Transmission Error (Between Indoor Unit And Outdoor Unit)

    SiUS091601E 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 Conditions abnormal.
  • Page 90 Troubleshooting SiUS091601E 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.103 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 91: Unspecified Voltage (Between Indoor Unit And Outdoor Unit)

    SiUS091601E 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 indoor / outdoor transmission signal. Detection Error Decision The pair type and multi type are interconnected.

  • Page 92: Outdoor Unit Pcb Abnormality

    Troubleshooting SiUS091601E Outdoor Unit PCB Abnormality Error Code Method of Error The system checks if the microprocessor is working in order. The system checks if the zero-cross signal comes in properly. Detection Error Decision The microprocessor program runs out of control. The zero-cross signal is not detected.

  • Page 93: Ol Activation (Compressor Overload)

    SiUS091601E 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 94 Troubleshooting SiUS091601E 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.101 Discharge pipe thermistor Insert the thermistor in disconnected? position. Check No.12 Refer to P.103 Check No.

  • Page 95: Compressor Lock

    SiUS091601E 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. Reset condition: Continuous run for about 11 minutes without any other error Conditions Supposed Closed stop valve...

  • Page 96: Dc Fan Lock

    Troubleshooting SiUS091601E 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 97: Input Overcurrent Detection

    SiUS091601E 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 12.0 ~ 18.0 A (depending on the model and operation mode) for 2.5 seconds with the compressor running.

  • Page 98: Four Way Valve Abnormality

    Troubleshooting SiUS091601E 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. Cooling / Dry Conditions A –...
  • Page 99 SiUS091601E 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.101 Correct the four way valve disconnected (loose)? coil. Check No.13 Refer to P.104 Harness disconnected? Reconnect the harness.

  • Page 100: Discharge Pipe Temperature Control

    Troubleshooting SiUS091601E 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 101: High Pressure Control In Cooling

    SiUS091601E 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 ~ 61°C (138.2 ~ 141.8°F) (depending on the model).
  • Page 102 Troubleshooting SiUS091601E 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.101 Check No. 17 Check No.12 Change the installation Check the installation Refer to P.103 condition.

  • Page 103: Compressor System Sensor Abnormality

    SiUS091601E 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 ~ Conditions 4.5 V.

  • Page 104: Position Sensor Abnormality

    Troubleshooting SiUS091601E 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. Reset condition: Continuous run for about 11 minutes without any other error Conditions Supposed...
  • Page 105 SiUS091601E 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.105 Check the power supply voltage. Check No.18 Refer to P.108 Is the power supply voltage fluctuation within...

  • Page 106: Thermistor Or Related Abnormality (Outdoor Unit)

    Troubleshooting SiUS091601E 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 107 SiUS091601E 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.101 Error displayed Reconnect the connectors again on remote...

  • Page 108: Electrical Box Temperature Rise

    Troubleshooting SiUS091601E 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. The error is cleared when the radiation fin temperature drops below B.

  • Page 109: Radiation Fin Temperature Rise

    SiUS091601E 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. The error is cleared when the radiation fin temperature drops below B.

  • Page 110: Output Overcurrent Detection

    Troubleshooting SiUS091601E 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. A rotation speed error occurs while the compressor is running.
  • Page 111 SiUS091601E 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 112: Check

    Check SiUS091601E 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 113: Indoor Fan Motor Connector Output Check

    SiUS091601E Check Indoor Fan Motor Connector Output Check Check No.03 FTX Series 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 114: Power Supply Waveforms Check

    Check SiUS091601E 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 115: Four Way Valve Performance Check

    SiUS091601E 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 116: Inverter Analyzer Check

    Check SiUS091601E 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 117 SiUS091601E Check Step 3 Activate power transistor test operation from the indoor unit. (1) Turn the power on. (2) Press the center of TEMP button and OFF button on the remote controller at the same time. (3) Select T with TEMP or TEMP button.

  • Page 118: Rotation Pulse Check On The Outdoor Unit Pcb

    Check SiUS091601E 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 119: Installation Condition Check

    SiUS091601E 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 120: Outdoor Fan System Check

    Check SiUS091601E 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 121 SiUS091601E Check 12 class Multimeter (R23024) 15 class Multimeter (R20701) Service Diagnosis...

  • Page 122: Power Module Check

    Check SiUS091601E 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 123 SiUS091601E Check 12 class Pin 24: + Pin 23: U Pin 22: V Pin 21: W Pin 20: – (R23025) 15 class DC_P1: + (R20704) DC_N1: – Service Diagnosis...

  • Page 124: Part 7 Trial Operation And Field Settings

    SiUS091601E Part 7 Trial Operation and Field Settings 1. Pump Down Operation................114 2. Forced Cooling Operation ...............115 3. Trial Operation ..................116 4. Field Settings ..................118 4.1 Temperature Display Switch ..............118 4.2 When 2 Units are Installed in 1 Room............119 4.3 Jumper and Switch Settings..............

  • Page 125: Pump Down Operation

    SiUS091601E Pump Down Operation 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. Detail 1. Remove the valve caps from the liquid stop valve and the gas stop valve. 2.

  • Page 126: Forced Cooling Operation

    Forced Cooling Operation SiUS091601E 2. Forced Cooling Operation Item Forced Cooling Conditions 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. Start Press the forced cooling operation ON/OFF button (SW1) on the indoor unit for 5 seconds.

  • Page 127: Trial Operation

    SiUS091601E Trial Operation 3. 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 128 Trial Operation SiUS091601E ARC466 Series (1) Press On/Off button to turn on the system. (2) Press the center of Temp button and Mode button at the same time. (3) Select T (trial operation) with Temp or Temp button. (4) Press Mode button to start the trial operation. (5) Press Mode button and select operation mode.

  • Page 129: Field Settings

    SiUS091601E Field Settings 4. Field Settings Temperature Display Switch ARC480A8 You can select Fahrenheit or Celsius for temperature display. Press 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 TEMP buttons simultaneously for 5 seconds.

  • Page 130: When 2 Units Are Installed In 1 Room

    Field Settings SiUS091601E 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. FTX Series (1) Remove the battery cover of the remote controller.
  • Page 131 SiUS091601E Field Settings FVXS Series (1) Remove the front grille. (2) Lift the sensor PCB fixing plate and remove the front shield plate. (3) Disconnect the connectors S1, S41, S42. (4) Remove the electric box (1 screw). (5) Pull out the indoor heat exchanger thermistor. (6) Remove the shield plate (8 tabs).

  • Page 132: Jumper And Switch Settings

    Field Settings SiUS091601E Jumper and Switch Settings FVXS Series Jumper Jumper (on indoor Function When connected When cut unit PCB) (factory setting) Fan speed setting Fan speed setting; The fan stops. when compressor Remote controller stops for thermostat setting OFF. (effective only at cooling operation) Power failure Auto-restart...

  • Page 133: Silicone Grease On Power Transistor / Diode Bridge

    SiUS091601E Silicone Grease on Power Transistor / Diode Bridge 5. 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 134: Part 8 Appendix

    SiUS091601E Part 8 Appendix 1. Piping Diagrams..................124 1.1 Indoor unit ....................124 1.2 Outdoor Unit ..................... 125 2. Wiring Diagrams..................127 2.1 Indoor Unit....................127 2.2 Outdoor Unit ..................... 130 Appendix...

  • Page 135: Piping Diagrams

    SiUS091601E Piping Diagrams 1. Piping Diagrams Indoor unit 1.1.1 Heat Pump FTX09/12NMVJU FTX15NMVJU INDOOR UNIT INDOOR UNIT HEAT EXCHANGER 1/4 CuT DISTRIBUTOR HEAT EXCHANGER THERMISTOR ON HEAT EXCH. THERMISTOR CROSS FLOW FAN ON HEAT EXCH. FIELD PIPING FIELD PIPING CROSS FLOW FAN 1/4 CuT ( 1/4 CuT ) SINGLE UNION...

  • Page 136: Outdoor Unit

    Piping Diagrams SiUS091601E Outdoor Unit RXL09QMVJU OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER 9/32 CuT THERMISTOR CAPILLARY TUBE 5/32 CuT 1/4 CuT 1/4 CuT 1/4 CuT 9/32 CuT CAPILLARY TUBE 9/32 CuT MUFFLER 5/32 CuT 9/32 CuT WITH 9/32 CuT FILTER 9/32 CuT HEAT EXCHANGER DISTRIBUTOR...
  • Page 137 SiUS091601E Piping Diagrams RXL15QMVJU OUTDOOR UNIT HEAT EXCHANGER OUTDOOR AIR 9/32 CuT THERMISTOR 9/32 CuT CAPILLARY TUBE 9/32 CuT 5/32 CuT 9/32 CuT 1/4 CuT 1/4 CuT 9/32 CuT REFRIGERANT FLOW 9/32 CuT COOLING MUFFLER HEATING WITH HEAT EXCHANGER FILTER THERMISTOR ELECTRONIC EXPANSION...

  • Page 138: Wiring Diagrams

    Wiring Diagrams SiUS091601E 2. Wiring Diagrams Indoor Unit FTX09/12NMVJU WIRING DIAGRAM PCB2 PCB1 FIELD WIRING. MR10 LED1 TRANSMISSION GRN/YLW CIRCUIT MR10 LED2 OUTDOOR RECTIFIER t˚ 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 139 SiUS091601E Wiring Diagrams FTX15NMVJU WIRING DIAGRAM Z2C (N=2) PCB 1 FIELD WIRING. CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER MR10 SUPPLY IS TURNED OFF AND THEN BACK GRN/YLW L301 ON AGAIN. MR10 OUTDOOR RECTIFIER S100 3.15A (N=2) PCB 3 S800...
  • Page 140 Wiring Diagrams SiUS091601E FVXS09/12/15NVJU WIRING DIAGRAM PCB3 PCB2 → RECTIFIER S2W ( 4 ) 3.15A OUTDOOR GRN/YLW FIELD WIRING. MR10 WIRELESS TRANSMISSION REMOTE CIRCUIT CAUTION CONTROLLER PCB4 NOTE THAT OPERATION WILL SIGNAL RESTART AUTOMATICALLY IF RECEIVER THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK LED1 LED2...

  • Page 141: Outdoor Unit

    SiUS091601E Wiring Diagrams Outdoor Unit RXL09QMVJU WIRING DIAGRAM 3.15A 3.15A t˚ OPTION IPM1 MRM10 HN1 V2 C400 INDOOR C405 MR30 V150 3.15A 3.15A POWER SUPPLY MRCW FIELD WIRING OUTDOOR PCB1 NOTE 1. REFER TO THE NAMEPLATE FOR THE POWER IN CASE OF t˚...
  • Page 142 Wiring Diagrams SiUS091601E RXL12QMVJU WIRING DIAGRAM 3.15A 3.15A t˚ OPTION IPM1 MRM10 L2 2 HN1 V2 MRM20 INDOOR V150 MR30 3.15A 3.15A MRCW X11A OUTDOOR FIELD WIRING t˚ t˚ t˚ NOTE 1. REFER TO THE NAMEPLATE FOR THE POWER. (OUTDOOR) (DISCHARGE) : CAPACITOR (CONDENSER)
  • Page 143 SiUS091601E Wiring Diagrams RXL15QMVJU WIRING DIAGRAM FIELD WIRING 3.15A 3.15A INDOOR t˚ OPTION MRM20 IPM1 TO INDOOR UNIT MRM10 L2 2 3.15A MR30 W V U 3.15A MRCW POWER SUPPLY X11A OUTDOOR NOTE 1. REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS. : CAPACITOR t˚...
  • Page 144 Revision History Month / Year Version Revised contents 02 / 2016 SiUS091601E First edition...
  • Page 145 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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