Daikin B-Series Service Manual
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Daikin B-Series Service Manual

Floor standing inverter pair
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Service
Manual
Inverter Pair
Floor Standing Type B-Series
[Applied Models]
Inverter Pair : Cooling Only
Inverter Pair : Heat Pump
Non-Inverter Pair : Cooling Only
Si06-313

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Summary of Contents for Daikin B-Series

  • Page 1 Si06-313 Service Manual Inverter Pair Floor Standing Type B-Series [Applied Models] Inverter Pair : Cooling Only Inverter Pair : Heat Pump Non-Inverter Pair : Cooling Only...
  • Page 2 Si06-313 Inverter Pair Inverter Pair Inverter Pair Inverter Pair B-Series B-Series B-Series B-Series Cooling Only Indoor Unit FVKS50BVMB Outdoor Unit RKS50BVMB RS50BVMB Heat Pump Indoor Unit FVXS50BVMB Outdoor Unit RXS50BVMB RXS50BVMA Table of Contents...

  • Page 3: Table Of Contents

    Si06-313 1. Introduction .....................v 1.1 Safety Cautions ..................v Part 1 List of Functions ..............1 1. List of Functions ..................2 1.1 Cooling Only.....................2 1.2 Heat Pump ....................3 Part 2 Specifications ..............5 1. Specifications ..................6 1.1 Cooling Only.....................6 1.2 Heat Pump ....................7 Part 3 Printed Circuit Board Connector Wiring Diagram .....
  • Page 4 Si06-313 Part 5 System Configuration............41 1. System Configuration................42 2. Instruction....................43 2.1 Safety Precautions .................43 2.2 Names of Parts..................45 2.3 Preparation before Operation..............48 2.4 AUTO·DRY·COOL·HEAT·FAN Operation ..........51 2.5 Adjusting the Air Flow Direction .............53 2.6 POWERFUL Operation ................55 2.7 OUTDOOR UNIT SILENT Operation .............56 2.8 HOME LEAVE Operation ...............57 2.9 TIMER Operation ...................59 2.10 Care and Cleaning .................61...
  • Page 5 Si06-313 1.3 Removal of the Electrical Box ..............118 1.4 Removal of the PCB................121 1.5 Removal of the Heat Exchanger ............123 1.6 Removal of the Fan Rotor / Fan Motor..........125 2. Outdoor Unit..................127 2.1 Removal of the Panels and Plates ............127 2.2 Removal of the Fan Motor / Propeller Fan ...........131 2.3 Removal of the PCB / Electrical Box ............135 2.4 Removal of the Reactor................143...

  • Page 6: Introduction

    Si06-313 Introduction 1. Introduction Safety Cautions Cautions and Be sure to read the following safety cautions before conducting repair work. The caution items are classified into “ Warning” and “ Caution”. The “ Warning” Warnings items are especially important since they can lead to death or serious injury if they are not followed closely.
  • Page 7 Introduction Si06-313 Caution Do not repair the electrical components with wet hands. Working on the equipment with wet hands can cause an electrical shock. Do not clean the air conditioner by splashing water. Washing the unit with water can cause an electrical shock. Be sure to provide the grounding when repairing the equipment in a humid or wet place, to avoid electrical shocks.
  • Page 8 Si06-313 Introduction Warning Be sure to use an exclusive power circuit for the equipment, and follow the technical standards related to the electrical equipment, the internal wiring regulations and the instruction manual for installation when conducting electrical work. Insufficient power circuit capacity and improper electrical work can cause an electrical shock or fire.
  • Page 9 Introduction Si06-313 Warning Do not use a joined power cable or extension cable, or share the same power outlet with other electrical appliances, since it can cause an electrical shock, excessive heat generation or fire. Caution Check to see if the parts and wires are mounted and connected properly, and if the connections at the soldered or crimped terminals are secure.

  • Page 10: Part 1 List Of Functions

    Si06-313 Part 1 Part 1 Part 1 Part 1 List of Functions List of Functions List of Functions List of Functions 1. List of Functions ..................2 1.1 Cooling Only.....................2 1.2 Heat Pump ....................3 List of Functions...

  • Page 11: List Of Functions

    List of Functions Si06-313 List of Functions Cooling Only Category Functions Category Functions Inverter (with Inverter Power Control) — Air Purifying Filter with Bacteriostatic, –10 –10 Virustatic Functions Operation Limit for Cooling (°CDB) Basic Function Operation Limit for Heating (°CWB) —...

  • Page 12: Heat Pump

    Si06-313 List of Functions Heat Pump Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, –10 –5 Virustatic Functions Operation Limit for Cooling (°CDB) Basic –15 –15 Function Operation Limit for Heating (°CWB) Photocatalytic Deodorizing Filter Air Purifying Filter with Photocatalytic PAM Control —...
  • Page 13 List of Functions Si06-313 List of Functions...

  • Page 14: Part 2 Specifications

    Si06-313 Part 2 Part 2 Part 2 Part 2 Specifications Specifications Specifications Specifications 1. Specifications ..................6 1.1 Cooling Only.....................6 1.2 Heat Pump ....................7 Specifications...

  • Page 15: Specifications

    Specifications Si06-313 Specifications Cooling Only 230V, 50Hz Indoor Units FVKS50BVMB FVKS50BVMB Model Outdoor Units RKS50BVMB RS50BVMB 4.8 (0.9~5.3) Capacity Btu/h 16,390 (3,070~18,090) 16,390 kcal/h 4,130 (770~4,560) 4,130 Moisture Removal Running Current Power Consumption 1,700 (450~2,350) 1,700 Power Factor 98.6 98.6 2.82 2.82 φ...

  • Page 16: Heat Pump

    Si06-313 Specifications Heat Pump 230V, 50Hz 240V, 50Hz Indoor Units FVXS50BVMB FVXS50BVMB Model RXS50BVMB RXS50BVMA Outdoor Units Cooling Heating Cooling Heating 4.8 (0.9~5.3) 6.0 (0.9~7.7) 4.8 (0.9~5.3) 6.0 (0.9~7.7) Capacity Btu/h 16,390 (3,070~18,090) 20,480 (3,070~26,290) 16,390 (3,070~18,090) 20,480 (3,070~26,290) kcal/h 4,130 (770~4,560) 5,160 (770~6,620) 4,130 (770~4,560)
  • Page 17 Specifications Si06-313 Specifications...

  • Page 18: Part 3 Printed Circuit Board Connector Wiring Diagram

    Si06-313 Part 3 Part 3 Part 3 Part 3 Printed Circuit Board Printed Circuit Board Printed Circuit Board Printed Circuit Board Connector Wiring Diagram Connector Wiring Diagram Connector Wiring Diagram Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........10 1.1 Indoor Unit....................10 1.2 Outdoor Unit ...................12 Printed Circuit Board Connector Wiring Diagram...

  • Page 19: Printed Circuit Board Connector Wiring Diagram

    Printed Circuit Board Connector Wiring Diagram Si06-313 1. Printed Circuit Board Connector Wiring Diagram Indoor Unit Connectors Connector for swing motor (upper and lower) 2) S7, S201, S203 Connector for power supply PCB 3) S8, S24, Connector for control PCB S202, S204 Connector for...
  • Page 20 Si06-313 Printed Circuit Board Connector Wiring Diagram PCB(2): Control PCB (indoor unit) S302 S301 S201 S203 (R3026) PCB(3): Service PCB PCB(4): Display PCB LED11 LED12 LED14 (R3027) (R3028) Printed Circuit Board Connector Wiring Diagram...

  • Page 21: Outdoor Unit

    Printed Circuit Board Connector Wiring Diagram Si06-313 Outdoor Unit Connectors 1) S10, AC2, Connector for terminal strip Connector for electronic expansion valve coil 3) S31, Connector for SPM 4) S33, Connector for MID 5) S34, S52, S72, S102 Connector for control PCB CN11, CN14 HAC1,...
  • Page 22 Si06-313 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB (outdoor unit) FU2(3.15A) S101 (R2865) PCB(2): Power Supply PCB (outdoor unit) Service Monitor PCB FU1(30A) LED-A HAC1 S102 (R2867) (R2866) Printed Circuit Board Connector Wiring Diagram...
  • Page 23 Printed Circuit Board Connector Wiring Diagram Si06-313 FU201 (3.15A) (R2868) CN11 CN14 (R2869) Printed Circuit Board Connector Wiring Diagram...

  • Page 24: Part 4 Function And Control

    Si06-313 Part 4 Part 4 Part 4 Part 4 Function and Control Function and Control Function and Control Function and Control 1. Main Functions..................16 1.1 Frequency Principle................16 1.2 Wide Angle Louvers and Auto-Swing.............18 1.3 Fan Speed Control for Indoor Units............19 1.4 Programme Dry Function ...............20 1.5 Automatic Operation................21 1.6 Night Set Mode..................22...

  • Page 25: Main Functions

    Main Functions Si06-313 1. Main Functions Note: See the list of functions for the functions applicable to different models. Frequency Principle Main Control The compressor is frequency-controlled during normal operation. The target frequency is set by the following 2 parameters coming from the operating indoor unit: Parameters The load condition of the operating indoor unit The difference between the room temperature and the set temperature...
  • Page 26 Si06-313 Main Functions Inverter Features The inverter provides the following features: The regulating capacity can be changed according to the changes in the outside temperature and cooling/heating load. Quick heating and quick cooling The compressor rotational speed is increased when starting the heating (or cooling). This enables a quick set temperature.

  • Page 27: Wide Angle Louvers And Auto-Swing

    Main Functions Si06-313 Wide Angle Louvers and Auto-Swing Wide-Angle The louvres, made of elastic synthetic resin, provide a wide range of airflow that guarantees a comfortable air distribution. Louvres right and left (manual) upper air outlet (R3033) lower air outlet (R3034) Auto-Swing The following table explains the auto-swing process for heating, cooling, dry and fan :...

  • Page 28: Fan Speed Control For Indoor Units

    Si06-313 Main Functions Fan Speed Control for Indoor Units Control Mode The airflow rate can be automatically controlled depending on the difference between the set temperature and the room temperature. This is done through phase control and hall IC control. For more information about hall IC, refer to the troubleshooting for fan motor on page 75.

  • Page 29: Programme Dry Function

    Main Functions Si06-313 Programme Dry Function Programme dry function removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and air flow volume, the temperature adjustment and fan adjustment buttons are inoperable in this mode. In Case of The microcomputer automatically sets the temperature and fan settings.

  • Page 30: Automatic Operation

    Si06-313 Main Functions Automatic Operation Automatic Cooling / Heating Function (Heat Pump Only) When the AUTO mode is selected with the remote controller, the microcomputer automatically determines the operation mode from cooling and heating according to the room temperature and setting temperature at the time of the operation startup, and automatically operates in that mode.

  • Page 31: Night Set Mode

    Main Functions Si06-313 Night Set Mode When the OFF timer is set, the Night Set circuit automatically activates. The Night Set circuit maintains the airflow setting made by users. The Night Set The Night Set circuit continues heating or cooling the room at the set temperature for the first Circuit one hour, then automatically lowers the temperature setting slightly in the case of cooling, or raises it slightly in the case of heating, for economical operations.

  • Page 32: Home Leave Operation

    Si06-313 Main Functions Home Leave Operation Outline In order to respond to the customer's need for immediate heating and cooling of the room after returning home or for house care, a measure to switch the temperature and air volume from that for normal time over to outing time by one touch is provided.

  • Page 33: Inverter Powerful Operation

    Main Functions Si06-313 Inverter Powerful Operation Outline In order to exploit the cooling and heating capacity to full extent, operate the air conditioner by increasing the indoor fan rotating speed and the compressor frequency. Details of the When Powerful button is pushed in each operation mode, the fan speed/setting temperature will be converted to the following states in a period of twenty minutes.

  • Page 34: Other Functions

    Si06-313 Main Functions Other Functions 1.9.1 Hot Start Function Heat Pump Only In order to prevent the cold air blast that normally comes when heating is started, the temperature of the heat exchanger of the indoor unit is detected, and either the air flow is stopped or is made very weak thereby carrying out comfortable heating of the room.

  • Page 35: Function Of Main Structural Parts

    Function of Main Structural Parts Si06-313 2. Function of Main Structural Parts Function of Thermistor 2.1.1 Heat Pump Model Electrontic expansion valve Four way valve Compressor (R2827) Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature. Set a target discharge temperature depending on the outdoor and indoor heat exchanger Exchanger temperature.
  • Page 36 Si06-313 Function of Main Structural Parts 2.1.2 Cooling Only Model Electrontic expansion valve Compressor (R2828) Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature. Exchanger Set a target discharge temperature depending on the outdoor and indoor heat exchanger temperature.

  • Page 37: Control Specification

    Control Specification Si06-313 3. Control Specification Mode Hierarchy Outline There are two modes; the mode selected in user’s place (normal air conditioning mode) and forced operation mode for installation and providing service. Detail 1. For heat pump model There are following modes; stop, cooling (includes drying), heating (include defrosting) Air conditioner control mode Forced operating mode Forced cooling (for Pump Down Operation)

  • Page 38: Frequency Control

    Si06-313 Control Specification Frequency Control Outline Frequency will be determined according to the difference between room and set temperature. The function is explained as follows. 1. How to determine frequency. 2. Frequency command from an indoor unit. (The difference between a room temperature and the temperature set by the remote controller.) 3.
  • Page 39 Control Specification Si06-313 3. Determine lower limit frequency Set a maximum value as an lower limit frequency among the frequency lower limits of the following functions: Pressure difference upkeep. 4. Determine prohibited frequency There is a certain prohibited frequency such as a power supply frequency. Indoor Frequency Command ( ∆...

  • Page 40: Controls At Mode Changing / Start-Up

    Si06-313 Control Specification Controls at Mode Changing / Start-up 3.3.1 Preheating Operation Outline Operate the inverter in the open phase operation with the conditions including the preheating command (only for heat pump model) from the indoor, the outdoor air temperature and discharge pipe temperature.

  • Page 41: Discharge Pipe Temperature Control

    Control Specification Si06-313 Discharge Pipe Temperature Control Outline The discharge pipe temperature is used as the compressor's internal temperature. If the discharge pipe temperature rises above a certain level, the operating frequency upper limit is set to keep this temperature from going up further. Detail Divide the Zone (R2836)

  • Page 42: Freeze-Up Protection Control

    Si06-313 Control Specification Freeze-up Protection Control Outline During cooling operation, the signals being sent from the indoor unit allow the operating frequency limitation and then prevent freezing of the indoor heat exchanger. (The signal from the indoor unit must be divided into the zones as the followings. Detail Conditions for Start Controlling Judge the controlling start with the indoor heat exchanger temperature after 2 sec from...

  • Page 43: Fan Control

    Control Specification Si06-313 Fan Control Outline Fan control is carried out according to the following priority. 1. Fan ON control for electric component cooling fan 2. Fan control when defrosting 3. Fan OFF delay when stopped 4. ON/OFF control in cooling operation 5.

  • Page 44: Low Hz High Pressure Limit

    Si06-313 Control Specification 3.10 Low Hz High Pressure Limit Outline Heat Pump Only Set the upper limit of high pressure in a low Hz zone. Set the upper limit of the indoor heat exchanger temperature by its operating frequency of Hz. Separate into three zones, reset zone, unchanged zone and drooping zone and the frequency control must be carried out in such zones.

  • Page 45: Electronic Expansion Valve Control

    Control Specification Si06-313 3.12 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 46 Si06-313 Control Specification 3.12.1 Fully Closing with Power ON Initialize the electronic expansion valve when turning on the power, set the opening position and develop pressure equalizing. 3.12.2 Pressure Equalization Control When the compressor is stopped, open and close the electronic expansion valve and develop pressure equalization.
  • Page 47 Control Specification Si06-313 3.12.7 Control when frequency is changed When the target discharge pipe temperature control is active, if the target frequency is changed for a specified value in a certain time period, cancel the target discharge pipe temperature control and change the target opening of the electronic expansion valve according to the shift. 3.12.8 Target Discharge Pipe Temperature Control Obtain the target discharge pipe temperature from the indoor and outdoor heat exchanger...

  • Page 48: 3.13 Malfunctions

    Si06-313 Control Specification 3.13 Malfunctions 3.13.1 Sensor Malfunction Detection Sensor malfunction may occur either in the thermistor or current transformer (CT) system. Relating to Thermistor Malfunction 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Fin thermistor 4. Outside air thermistor Relating to CT Malfunction When the output frequency is more than 55 Hz and the input current is less than 1.25A, carry out abnormal adjustment.

  • Page 49: Forced Operation Mode

    Control Specification Si06-313 3.14 Forced Operation Mode Outline Forced operating mode includes only forced cooling. Detail Forced Cooling Item Forced Cooling Forced operation 1) The outdoor unit is not abnormal allowing conditions and not in the 3-minute stand-by mode. 2) The operating mode of the outdoor unit is the stop mode.

  • Page 50: Part 5 System Configuration

    Si06-313 Part 5 Part 5 Part 5 Part 5 System Configuration System Configuration System Configuration System Configuration 1. System Configuration................42 2. Instruction....................43 2.1 Safety Precautions .................43 2.2 Names of Parts..................45 2.3 Preparation before Operation..............48 2.4 AUTO·DRY·COOL·HEAT·FAN Operation ..........51 2.5 Adjusting the Air Flow Direction .............53 2.6 POWERFUL Operation ................55 2.7 OUTDOOR UNIT SILENT Operation .............56 2.8 HOME LEAVE Operation ...............57...

  • Page 51: System Configuration

    System Configuration Si06-313 1. System Configuration After the installation and test operation of the room air conditioner have been completed, it should be operated and handled as described below. Every user would like to know the correct method of operation of the room air conditioner, to check if it is capable of cooling (or heating) well, and to know a clever method of using it.

  • Page 52: Instruction

    • Do not attempt to repair, relocate, modify or reinstall the air conditioner by yourself. Incorrect work will cause electric shocks, fire etc. For repairs and reinstallation, consult your Daikin dealer for advice and information. • The refrigerant used in the air conditioner is safe. Although leaks should not occur, if for some reason any refrigerant happens to leak into the room, make sure it does not come in contact with any flame as of gas heaters, kerosene heaters or gas range.

  • Page 53: Installation Site

    Instruction Si06-313 • Do not stand or sit on the outdoor unit. Do not place any object on the unit to avoid injury, do not remove the fan guard. • Do not place anything under the indoor or outdoor unit that must be kept away from moisture. In certain conditions, moisture in the air may condense and drip.

  • Page 54: Names Of Parts

    Si06-313 Instruction Names of Parts Names of parts I Indoor Unit O F F I Opening the front grille How to open the grille: (page 22) Air outlet selection switch 12 13 • This setting blows air from upper outlet only. This setting automatically decides a blow •...
  • Page 55 Instruction Si06-313 I Outdoor Unit I I I I Indoor Unit 1. Photocatalytic deodorizing filter and • The operation mode refers to the following Air purifying filter: table. • These filters are attached to the inside of the air Temperature Air flow Mode filters.
  • Page 56 Si06-313 Instruction I Remote Controller HOME LEAVE ON/OFF TEMP POWERFUL MODE SWING SILENT CANCEL TIMER < > ARC433A5, A6 1. Signal transmitter: • It selects the operation mode. • It sends signals to the indoor unit. (AUTO/DRY/COOL/HEAT/FAN) (page 10.) 2. Display: 8.

  • Page 57: Preparation Before Operation

    Instruction Si06-313 Preparation before Operation Preparation Before Operation I To set the batteries Position + and – correctly! 1. Press with a finger and slide the front cover to take it off. 2. Set two dry batteries (AAA). 3. Set the front cover as before. ATTENTION I I I I About batteries •...
  • Page 58 Si06-313 Instruction Preparation Before Operation I To operate the remote controller • To use the remote controller, aim the transmitter at the indoor unit. If there is anything to block signals between the unit and the remote control- ler, such as a curtain, the unit will not operate. •...
  • Page 59 Instruction Si06-313 I To set the clock 1. Press “CLOCK button”. is displayed. blinks. 2. Press “TIMER setting button” to set the clock to the present time. HOME LEAVE ON/OFF Holding down “ ” or “ ” button rapidly TEMP POWERFUL increases or decreases the time display.

  • Page 60: Auto·dry·cool·heat·fan Operation

    Si06-313 Instruction AUTO·DRY·COOL·HEAT·FAN Operation AUTO · DRY · COOL · HEAT · FAN Operation The air conditioner operates with the operation mode of your choice. From the next time on, the air conditioner will operate with the same operation mode. I To start operation 1.
  • Page 61 Instruction Si06-313 I To change the air flow rate setting 5. Press “FAN setting button”. DRY mode AUTO or COOL or HEAT or FAN mode Five levels of air flow rate setting from “ ” to “ ” plus “ ”...

  • Page 62: Adjusting The Air Flow Direction

    Si06-313 Instruction Adjusting the Air Flow Direction Adjusting the Air Flow Direction You can adjust the air flow direction to increase your com- fort. I To adjust the horizontal blade (flap) 1. Press “SWING button”. The display will light up and the flaps will begin to swing.
  • Page 63 Instruction Si06-313 I Air flow selection • Make air flow selection according to what suits you. When setting the air flow selection switch to • Air conditioner automatically decides the appropriate blowing pattern depending on the operating mode/situation. Operating mode Situation Blowing pattern •...

  • Page 64: Powerful Operation

    Si06-313 Instruction POWERFUL Operation POWERFUL Operation POWERFUL operation quickly maximizes the cooling (heating) effect in any operation mode. You can get the maximum capacity . I To start POWERFUL operation 1. Press “POWERFUL button”. • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the settings which were used HOME LEAVE...

  • Page 65: Outdoor Unit Silent Operation

    Instruction Si06-313 OUTDOOR UNIT SILENT Operation System Configuration...

  • Page 66: Home Leave Operation

    Si06-313 Instruction HOME LEAVE Operation HOME LEAVE Operation HOME LEAVE operation is a function which allows you to record your preferred temperature and air flow rate settings. I To start HOME LEAVE operation 1. Press “HOME LEAVE button” . • The HOME LEAVE lamp lights up. O F F 1, 2 HOME LEAVE...
  • Page 67 Instruction Si06-313 I What’s the HOME LEAVE operation Is there a set temperature and air flow rate which is most comfortable, a set temperature and air flow rate which you use the most? HOME LEAVE operation is a function that allows you to record your favorite set tem- perature and air flow rate.

  • Page 68: Timer Operation

    Si06-313 Instruction TIMER Operation TIMER Operation Timer functions are useful for automatically switching the air conditioner on or off at night or in the morning. You can also use OFF TIMER and ON TIMER in combination. I To use OFF TIMER opera- tion •...
  • Page 69 Instruction Si06-313 I To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time (page 9.). 1. Press “ON TIMER button”. is displayed. blinks. 2. Press “TIMER Setting button” until the time setting reaches the point you like.

  • Page 70: Care And Cleaning

    Si06-313 Instruction 2.10 Care and Cleaning Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units I Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. I Front grille 1.
  • Page 71 Instruction Si06-313 Filters 1. Open the front grille. (page 22) 2. Remove the air filter. • Press the claws on the right and left of the air filter down slightly, then pull upward. 3. Take off the air purifying filter, Photocatalytic deodorizing filter.
  • Page 72 Si06-313 Instruction Check Check that the base, stand and other fittings of the outdoor unit are not decayed or corroded. Check that nothing blocks the air inlets and the outlets of the indoor unit and the outdoor unit. Check that the earth wire is not disconnected or broken. Check that the drain comes smoothly out of the drain hose during COOL or DRY operation.

  • Page 73: Troubleshooting

    Instruction Si06-313 2.11 Troubleshooting Trouble Shooting These cases are not troubles. The following cases are not air conditioner troubles but have some reasons. You may just continue using it. Case Explanation Operation does not start soon. • This is to protect the air conditioner. •...
  • Page 74 Si06-313 Instruction Check again. Please check again before calling a repair person. Case Check The air conditioner does not 2Hasn’t a breaker turned OFF or a fuse blown? operate. 2Isn’t it a power failure? (OPERATION lamp is off) 2Are batteries set in the remote controller? 2Is the timer setting correct? Cooling (Heating) effect is poor.
  • Page 75 Instruction Si06-313 Call the service shop immediately. WARNING I I I I When an abnormality (such as a burning smell) occurs, stop operation and turn the breaker OFF. Continued operation in an abnormal condition may result in troubles, electric shocks or fire. Consult the service shop where you bought the air conditioner.

  • Page 76: Part 6 Service Diagnosis

    Si06-313 Part 6 Part 6 Part 6 Part 6 Service Diagnosis Service Diagnosis Service Diagnosis Service Diagnosis 1. Caution for Diagnosis................68 2. Problem Symptoms and Measures ............69 3. Service Check Function ................70 4. Troubleshooting ..................71 4.1 Error Codes and Description ..............71 4.2 Indoor Unit PCB Abnormality ..............72 4.3 Freeze-up Protection Control or High Pressure Control......73 4.4 Fan Motor (DC Motor) or Related Abnormality........75...

  • Page 77: Caution For Diagnosis

    Caution for Diagnosis Si06-313 1. Caution for Diagnosis The Operation lamp flashes 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, disabling equipment operation. 2.

  • Page 78: Problem Symptoms And Measures

    Si06-313 Problem Symptoms and Measures Problem Symptoms and Measures Symptom Check Item Details of Measure Reference Page None of the units operates. Check the power supply. Check to make sure that the rated voltage is — supplied. Check the type of the indoor units. Check to make sure that the indoor unit type is —...

  • Page 79: Service Check Function

    Service Check Function Si06-313 Service Check Function In the ARC433A series remote controller, the temperature display sections on the main unit indicate corresponding codes. 1. When the timer cancel button is held down for 5 seconds, a “00” indication flashes on the temperature display section.

  • Page 80: Troubleshooting

    Si06-313 Troubleshooting Troubleshooting Error Codes and Description Reference Code Indication Description Page System — Normal Insufficient gas Low-voltage detection Signal transmission error (between indoor and outdoor units) Indoor Indoor unit PCB abnormality Unit Freeze-up protection control or high pressure control Fan motor or related abnormality Heat exchanger thermistor abnormality Shutter drive motor / shutter limit switch abnormality...

  • Page 81: Indoor Unit Pcb Abnormality

    Troubleshooting Si06-313 Indoor Unit PCB Abnormality Remote Controller Display Method of Evaluation of zero-cross detection of power supply by indoor unit. Malfunction Detection Malfunction When there is no zero-cross detection in approximately 10 continuous seconds. Decision Conditions Supposed Faulty indoor unit PCB Causes Faulty connector connection Troubleshooting...

  • Page 82: Freeze-Up Protection Control Or High Pressure Control

    Si06-313 Troubleshooting Freeze-up Protection Control or High Pressure Control Remote Controller Display Method of High pressure control (heat pump model only) Malfunction During heating operations, the temperature detected by the indoor heat exchanger thermistor is used for the high pressure control (stop, outdoor fan stop, etc.) Detection The freeze-up protection control (operation halt) is activated during cooling operation according to the temperature detected by the indoor unit heat exchanger thermistor.
  • Page 83 Troubleshooting Si06-313 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 Check the air passage. Refer to P.107 Is there any Provide sufficient air passage. short-circuit? Check the intake air filter. Is it very dirty? Clean the air filter.

  • Page 84: Fan Motor (Dc Motor) Or Related Abnormality

    Si06-313 Troubleshooting Fan Motor (DC Motor) or Related Abnormality Remote Controller Display Method of The rotation speed detected by the hall IC during fan motor operation is used to determine abnormal fan motor operation. Malfunction Detection Malfunction When the detected rotation speed is less than 50% of the H tap under maximum fan motor rotation demand.
  • Page 85 Troubleshooting Si06-313 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.01 Turn off power supply Refer to P.104 and rotate fan by hand. Check No.02 Does fan rotate Replace fan motor.

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

    Si06-313 Troubleshooting Thermistor or Related Abnormality (Indoor Unit) Remote Controller Display Method of The temperatures detected by the thermistors are used to determine thermistor errors. Malfunction Detection Malfunction When the thermistor input is more than 4.96 V or less than 0.04 V during compressor operation ∗...

  • Page 87: Shutter Drive Motor / Shutter Limit Switch Abnormality

    Troubleshooting Si06-313 Shutter Drive Motor / Shutter Limit Switch Abnormality Remote Controller Display Method of The shutter open/close performance is detected by the limit switch attached on its structure. In this way, the shutter drive motor and the shutter limit switch are checked for failure. Malfunction Detection Malfunction...

  • Page 88: Signal Transmission Error (Between Indoor And Outdoor Units)

    Si06-313 Troubleshooting Signal Transmission Error (between Indoor and Outdoor Units) Remote Controller Display Method of The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is checked whether it is normal. Malfunction Detection Malfunction When the data sent from the outdoor unit cannot be received normally, or when the content of the data is abnormal.

  • Page 89: Ol Activation (Compressor Overload)

    Troubleshooting Si06-313 OL Activation (Compressor Overload) Remote Controller Display Method of A compressor overload is detected through compressor OL. Malfunction Detection Malfunction If the compressor OL is activated twice, the system will be shut down. The error counter will reset itself if this or any other error does not occur during the following Decision 60-minute compressor running time (total time).

  • Page 90: Compressor Lock

    Si06-313 Troubleshooting Compressor Lock Remote Controller Display Method of A compressor lock is detected by checking the compressor running condition through the Malfunction position detection circuit. Detection Malfunction The position detection circuit detects a compressor frequency of below 10 Hz for 20 seconds or a frequency of above 160 Hz.

  • Page 91: Dc Fan Lock

    Troubleshooting Si06-313 4.10 DC Fan Lock Remote Controller Display Method of A fan motor or related error is detected by checking the high-voltage fan motor rpm being Malfunction detected by the hall IC. Detection Malfunction The fan does not start in 30 seconds even when the fan motor is running. The system will be shut down if the error occurs 16 times.

  • Page 92: Input Over Current Detection

    Si06-313 Troubleshooting 4.11 Input Over Current Detection Remote Controller Display Method of An input over-current is detected by checking the input current value being detected by CT with Malfunction the compressor running. Detection Malfunction The following CT input with the compressor running continues for 2.5 seconds. CT input : Above 20 A Decision The system will be shut down if the error occurs 16 times.
  • Page 93 Troubleshooting Si06-313 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.7 ∗ An input over-current may result from wrong internal wiring. If the wires have been disconnected and reconnected for part replacement, for example, and the system is interrupted by an input over-current, Refer to P.108 take the following procedure.

  • Page 94: Four Way Valve Abnormality

    Si06-313 Troubleshooting 4.12 Four Way Valve Abnormality Remote Controller Display Method of The room temperature thermistor, the indoor unit heat exchanger thermistor, the outdoor Malfunction temperature thermistor and the outdoor unit heat exchanger thermistor are checked to see if they function within their normal ranges in the operating mode. Detection Malfunction A following condition continues over 1 minute after operating 10 minutes.
  • Page 95 Troubleshooting Si06-313 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.5 Refer to P.106 Four way valve coil Correct. disconnected (loose)? Check No.6 Refer to P.107 Harness out of connector? Reconnect.

  • Page 96: Discharge Pipe Temperature Control

    Si06-313 Troubleshooting 4.13 Discharge Pipe Temperature Control Remote Controller Display Method of The discharge pipe temperature control (stop, frequency drooping, etc.) is checked with the Malfunction temperature being detected by the discharge pipe thermistor. Detection Malfunction If a stop takes place 6 times successively due to abnormal discharge pipe temperature, the system will be shut down.

  • Page 97: Position Sensor Abnormality

    Troubleshooting Si06-313 4.14 Position Sensor Abnormality Remote Controller Display Method of A compressor startup failure is detected by checking the compressor running condition through Malfunction the position detection circuit. Detection Malfunction The compressor fails to start in about 15 seconds after the compressor run command signal is sent.

  • Page 98: Ct Or Related Abnormality

    Si06-313 Troubleshooting 4.15 CT or Related Abnormality Remote Controller Display Method of A CT or related error is detected by checking the compressor running frequency and CT- Malfunction detected input current. Detection Malfunction The compressor running frequency is below 55 Hz and the CT input is below 0.1 V. (The input current is also below 1.25 A.) Decision If this error repeats 4 times, the system will be shut down.
  • Page 99 Troubleshooting Si06-313 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.12 Turn off the power and turn it on Refer to P.111 again. Get the system started. ∗...

  • Page 100: Thermistor Or Related Abnormality (Outdoor Unit)

    Si06-313 Troubleshooting 4.16 Thermistor or Related Abnormality (Outdoor Unit) P4, J3, J6, H9 Remote Controller Display Method of This type of error is detected by checking the thermistor input voltage to the microcomputer. Malfunction [A thermistor error is detected by checking the temperature.] Detection Malfunction The thermistor input is above 4.96 V or below 0.04 V with the power on.
  • Page 101 Troubleshooting Si06-313 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 Turn on the power again. Refer to P.107 Error displayed again Reconnect. on remote controller? Connector or thermistor Reconnect.

  • Page 102: Electrical Box Temperature Rise

    Si06-313 Troubleshooting 4.17 Electrical Box Temperature Rise Remote Controller Display Method of An electrical box temperature rise is detected by checking the radiation fin thermistor with the Malfunction compressor off. Detection Malfunction With the compressor off, the radiation fin temperature is above 80°C (above 75°C in the case of 7.1kW class).
  • Page 103 Troubleshooting Si06-313 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 WARNING Turn off the power and turn it on Refer to P.107 again. To cool down the electricals, the outdoor unit fan gets started when the radiation fin temperature rises above 78˚C and stops itself when...

  • Page 104: Radiation Fin Temperature Rise

    Si06-313 Troubleshooting 4.18 Radiation Fin Temperature Rise Remote Controller Display Method of A radiation fin temperature rise is detected by checking the radiation fin thermistor with the Malfunction compressor on. Detection Malfunction If the radiation fin temperature with the compressor on is above 90°C, If a radiation fin temperature rise takes place 4 times successively, the system will be shut Decision down.
  • Page 105 Troubleshooting Si06-313 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 Turn off the power and turn it on Refer to P.107 again to get the system started. Check No.7 Refer to P.108 Error displayed again?

  • Page 106: Output Over Current Detection

    Si06-313 Troubleshooting 4.19 Output Over Current Detection Remote Controller Display Method of An output over-current is detected by checking the current that flows in the inverter DC section. Malfunction Detection Malfunction A position signal error occurs while the compressor is running. A speed error occurs while the compressor is running.
  • Page 107 Troubleshooting Si06-313 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. ∗ An output over-current may result from wrong internal wiring. If the wires have been disconnected and Check No.7 reconnected for part replacement, for example, and the system is interrupted by an output over-current, take the following procedure.

  • Page 108: Insufficient Gas

    Si06-313 Troubleshooting 4.20 Insufficient Gas Remote Controller Display Method of Gas shortage detection I : A gas shortage is detected by checking the CT-detected input current Malfunction value and the compressor running frequency. Gas shortage detection II : A gas shortage is detected by checking the difference between Detection indoor unit heat exchanger temperature and room temperature as well as the difference between outdoor unit heat exchanger temperature and room temperature.
  • Page 109 Troubleshooting Si06-313 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.4 Refer to P.105 Any thermistor Reconnect in position. disconnected? * Discharge pipe thermistor * Indoor / outdoor unit heat exchanger thermistor * Room temperature thermistor Check No.6 * Outdoor air thermistor...

  • Page 110: Low-Voltage Detection

    Si06-313 Troubleshooting 4.21 Low-voltage Detection Remote Controller Display Method of An abnormal voltage rise or drop is detected by checking the detection circuit or DC voltage Malfunction detection circuit. Detection Malfunction An over-voltage signal is fed from the over-voltage detection circuit to the microcomputer, or the voltage being detected by the DC voltage detection circuit is judged to be below 150 V Decision for 0.1 second.

  • Page 111: High Pressure Control In Cooling

    Troubleshooting Si06-313 4.22 High Pressure Control in Cooling Remote Controller Display Method of High-pressure control (stop, frequency drop, etc.) is activated in the cooling mode if the Malfunction temperature being sensed by the heat exchanger thermistor exceeds the limit. Detection Malfunction Activated when the temperature being sensed by the heat exchanger thermistor rises above 60°C.
  • Page 112 Si06-313 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.4 Check the installation space. Refer to P.105 Check No.7 Abnormal Check No.6 Installation condition Change the air outlet grille Refer to P.107 check position.

  • Page 113: Check

    Check Si06-313 5. Check How to Check 5.1.1 Fan Motor Connector Output Check Check No.01 1. Check connector connection. 2. Check motor power supply voltage output (pins 4-7 and 4-8). 3. Check motor control voltage (pins 4-3). 4. Check rotation command voltage output (pins 4-2). 5.

  • Page 114: Electronic Expansion Valve Check

    Si06-313 Check 5.1.3 Electronic Expansion Valve Check Check No.4 Conduct the followings to check the electronic expansion valve (EV). 1. Check to see if the EV connector is correctly inserted in the PCB. Compare the EV unit and the connector number. 2.
  • Page 115 Check Si06-313 5.1.4 Four Way Valve Performance Check Check No.5 Turn off the power and turn it on again. ∗ Four way valve coil Cooling / dry : No continuity Start the heating-mode run. Heating : Continuity S80 voltage at DC 180-220 V with Replace the outdoor unit compressor on? PCB.

  • Page 116: Thermistor Resistance Check

    Si06-313 Check 5.1.5 Thermistor Resistance Check Check No.6 Remove the connectors of the thermistors on the PCB, and measure the resistance of each thermistor using tester. The relationship between normal temperature and resistance is shown in the graph and the table below.

  • Page 117: Installation Condition Check

    Check Si06-313 5.1.6 Installation Condition Check Check No.7 Installation condition check Check the allowable Abnormal Change the position of the air dimensions of the air suction discharge grille or the and discharge area. installation location. Normal Does the discharged air from other outdoor Change the position of the air unit cause an increase of discharge grille or the...

  • Page 118: Discharge Pressure Check

    Si06-313 Check 5.1.7 Discharge Pressure Check Check No.8 Discharge pressure check High Replace compessor. Open the stop valve. Is the stop valve open? Is the Replace the pipe installed at connection pipe deformed? the site. At the heat exchanger and Clean.
  • Page 119 Check Si06-313 5.1.9 Power Supply Waveforms Check Check No.10 Measure the power supply waveform between pins 1 and 3 on the terminal board, and check the waveform disturbance. Check to see if the power supply waveform is a sine wave (Fig.1). Check to see if there is waveform disturbance near the zero cross (sections circled in Fig.2) [Fig.1] [Fig.2]...

  • Page 120: Power Transistor Check

    Si06-313 Check 5.1.11 Capacitor Voltage Check Check No.12 Before this checking, be sure to check the main circuit for short-circuit. Checking the capacitor voltage With the circuit breaker still on, measure the voltage according to the drawing of the model in question.

  • Page 121: Main Circuit Electrolytic Capacitor Check

    Check Si06-313 5.1.13 Main Circuit Electrolytic Capacitor Check Check No.14 Checking the main circuit electrolytic capacitor Never touch any live parts for at least 10 minutes after turning off the circuit breaker. If unavoidably necessary to touch a live part, make sure there is no DC voltage using the tester.

  • Page 122: Part 7 Removal Procedure

    Si06-313 Part 7 Part 7 Part 7 Part 7 Removal Procedure Removal Procedure Removal Procedure Removal Procedure 1. Indoor Unit...................114 1.1 Removal of the Air Filter / Front Panel ..........114 1.2 Removal of the Horizontal Blade............117 1.3 Removal of the Electrical Box ..............118 1.4 Removal of the PCB................121 1.5 Removal of the Heat Exchanger ............123 1.6 Removal of the Fan Rotor / Fan Motor..........125...

  • Page 123: Indoor Unit

    Indoor Unit Si06-313 1. Indoor Unit Removal of the Air Filter / Front Panel Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Appearance Operation panel Enlarged illustration shows operation panel section.
  • Page 124 Si06-313 Indoor Unit Step Procedure Points Press down the two hooks located at left and right side upper parts of the filter, then bend slightly the air filter to remove it. Unhook the chain. Removal Procedure...
  • Page 125 Indoor Unit Si06-313 Step Procedure Points Disengage the three hooks on the bottom of the front panel. Remove the four screws to take out the front grille. Mounting screw M4 × 16 Removal Procedure...

  • Page 126: Removal Of The Horizontal Blade

    Si06-313 Indoor Unit Removal of the Horizontal Blade Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Open the horizontal blade. Disengage the supporting bracket at the center position. Bend the horizontal blade slightly to disengage the shafts at...

  • Page 127: Removal Of The Electrical Box

    Indoor Unit Si06-313 Removal of the Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Set the horizontal blade in horizontal position to take out the front grille forward.
  • Page 128 Si06-313 Indoor Unit Step Procedure Points Remove the room temperature thermistor. Remove the heat exchanger thermistor. Be sure not to drop the thermistor retaining spring Dismount the two Mounting screw M4 × 8 screws to remove the drip proof plate. Removal Procedure...
  • Page 129 Indoor Unit Si06-313 Step Procedure Points To remove the Mounting screw M4 × 16 electrical box, dismount the two fixing screws and pull out the box forward. Illustration shows parts in the electrical box. Removal Procedure...

  • Page 130: Removal Of The Pcb

    Si06-313 Indoor Unit Removal of the PCB Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Dismount the fixing screw to remove PCBs from the electrical box. Display PCB Illustration shows the control PCB (indoor...
  • Page 131 Indoor Unit Si06-313 Step Procedure Points Illustration shows the power supply PCB (indoor unit). SW2-1: unused SW2-2: unused SW2-3: unused SW2-4: OFF-initial set ON-limit upward air flow Illustration shows the service PCB. Select to discharge air only from top discharge port. Select to discharge air with automatic pattern...

  • Page 132: Removal Of The Heat Exchanger

    Si06-313 Indoor Unit Removal of the Heat Exchanger Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Conduct pump-down Mounting screw M4 × 16 operation and check that gas has been purged completely before starting service work.
  • Page 133 Indoor Unit Si06-313 Step Procedure Points Dismount the fixing Mounting screw M4 × 16 screw to remove the pipe retaining plate of the heat exchanger. Push the pipe retaining plate backward to disengage hook, then open the retaining plate using straight edge of screw-driver to remove the plate.

  • Page 134: Removal Of The Fan Rotor / Fan Motor

    Si06-313 Indoor Unit Removal of the Fan Rotor / Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points For removal of the drain pan, disconnect the drain hose, then dismount the two screws located at left...
  • Page 135 Indoor Unit Si06-313 Step Procedure Points Dismount the six Short lead wire: for the upper screws (three for the fan motor upper side motor and Long lead wire: for the three for the bottom bottom fan motor one) to remove the Mounting screw M4 ×...

  • Page 136: Outdoor Unit

    Si06-313 Outdoor Unit 2. Outdoor Unit Removal of the Panels and Plates Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the panels and plates. Loosen the four screws and lift the panel.
  • Page 137 Outdoor Unit Si06-313 Step Procedure Points The front grille has four claws. Slide the discharge grille upwards and remove it. Loosen the six screws of the front panel. Push the front panel and undo the claw. Lift the clamp plate remove it.
  • Page 138 Si06-313 Outdoor Unit Step Procedure Points Undo the right side Lift the front panel and claw, and then the left remove it while pushing the side claws. right side panel inwards. Remove the front panel. Lift the front panel and undo the left side claws.
  • Page 139 Outdoor Unit Si06-313 Step Procedure Points 2. Remove the stop valve cover. Loosen the screw of the stop valve cover. Pull down the stop valve cover to undo the claws and remove it. The stop valve cover has six claws. (R2687) Removal Procedure...

  • Page 140: Removal Of The Fan Motor / Propeller Fan

    Si06-313 Outdoor Unit Removal of the Fan Motor / Propeller Fan Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the top panel and the front panel. Shelter 1.
  • Page 141 Outdoor Unit Si06-313 Step Procedure Points 2. Remove the fan motor. Disconnect the connector for fan motor (S70). The illustration shows arrangement of the fan motor lead wire. Removal Procedure...
  • Page 142 Si06-313 Outdoor Unit Step Procedure Points Unscrew the washer- fitted nut (M10) of the propeller fan with a spanner. Align mark of the propeller fan with D-cut section of the motor shaft when reassembling. Remove the four screws from the motor.
  • Page 143 Outdoor Unit Si06-313 Step Procedure Points Pull the fan motor out. Put the lead wire through the back of the motor when reassembling. (so as not to be entangled with the propeller fan) (R2697) Removal Procedure...

  • Page 144: Removal Of The Pcb / Electrical Box

    Si06-313 Outdoor Unit Removal of the PCB / Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the top panel and the front panel. 1.
  • Page 145 Outdoor Unit Si06-313 Step Procedure Points Insert the two claws of the lower part and the one claw of the upper back when Claw reassembling. (R2701) Claws (R2702) 2. Disconnect harnesses. Loosen the fixing screw Service monitor PCB of the cable way board.
  • Page 146 Si06-313 Outdoor Unit Step Procedure Points Push the claw up to release the cable way board. Open the cable way board. Disconnect the Power supply PCB (outdoor harnesses from the unit) power supply PCB. V3(varistor) HAC1 (black) ···· to the terminal strip (yellow / green) ····...
  • Page 147 Outdoor Unit Si06-313 Step Procedure Points Loosen the screw of the control PCB. Undo the two claws and release the control PCB from the ditch of the front side. Disconnect the harnesses while opening the control PCB. S10: to the terminal strip AC2: to the terminal strip...
  • Page 148 Si06-313 Outdoor Unit Step Procedure Points Disconnect the connectors. S31: to the SPM S32: to the SPM S33: to the MID S71: to the MID S91: fin thermistor Control PCB (outdoor unit) S10: to the terminal strip S20: electronic expansion valve S31: to CN14 of the...
  • Page 149 Outdoor Unit Si06-313 Step Procedure Points Disconnect the relaying wire connector for the compressor. Release the clamp by pliers. (R2715) Disconnect the reactor harness. Removal Procedure...
  • Page 150 Si06-313 Outdoor Unit Step Procedure Points Pull the clamp and draw the thermistor harness out from the back of the electrical box. Loosen the screw of the electrical box. Removal Procedure...
  • Page 151 Outdoor Unit Si06-313 Step Procedure Points Release the clamp of the four way valve harness. (R2720) Lift the electrical box and remove it. Removal Procedure...

  • Page 152: Removal Of The Reactor

    Si06-313 Outdoor Unit Removal of the Reactor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the electrical box. 1. Remove the partition plate. Release the clamp by pliers.
  • Page 153 Outdoor Unit Si06-313 Step Procedure Points Lift the partition plate and remove it. Loosen the screw. Slide the reactor remove it from the partition plate. Removal Procedure...

  • Page 154: Removal Of The Sound Blanket

    Si06-313 Outdoor Unit Removal of the Sound Blanket Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Disconnect the harness of each thermistor. Release the discharge Pay attention to the direction pipe thermistor.
  • Page 155 Outdoor Unit Si06-313 Step Procedure Points Remove the sound Since the piping ports on the blanket (side-outer). sound blanket (side-outer) are torn easily, remove the blanket carefully. Remove the sound blanket (top-upper). Remove the sound blanket (top-lower). Remove the sound Since the piping ports on the blanket (side-inner).

  • Page 156: Removal Of The Four Way Valve

    Si06-313 Outdoor Unit Removal of the Four Way Valve Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Loosen the screw of the Provide a protective sheet or four way valve coil.

  • Page 157: Removal Of The Electronic Expansion Valve

    Outdoor Unit Si06-313 Removal of the Electronic Expansion Valve Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the electronic expansion valve coil. Remove the sheets of putty.

  • Page 158: Removal Of The Compressor

    Si06-313 Outdoor Unit Removal of the Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the terminal cover. Disconnect the lead Be careful so as not to burn wires of the the compressor terminals or compressor.
  • Page 159 Outdoor Unit Si06-313 Step Procedure Points Unscrew the nut of the compressor. Remove the putty of the accumulator. Before working, Warning make sure that the Ventilate when refrigerant refrigerant is empty leaks during the work. in the circuit. (If refrigerant contacts fire, it Be sure to apply will cause to arise toxic gas.) nitrogen...

  • Page 160: Part 8 Others

    Si06-313 Part 8 Part 8 Part 8 Part 8 Others Others Others Others 1. Others ....................152 1.1 Test Run from the Remote Controller ..........152 1.2 Jumper Settings ...................153 Others...

  • Page 161: Others

    Others Si06-313 1. Others Test Run from the Remote Controller For Heat pump In cooling mode, select the lowest programmable temperature; in heating mode, select the highest programmable temperature. Trial operation may be disabled in either mode depending on the room temperature. After trial operation is complete, set the temperature to a normal level.

  • Page 162: Jumper Settings

    Si06-313 Others Jumper Settings 1.2.1 When Two Units are Installed in One Room When two indoor units are installed in one room, the two wireless remote controllers can be set for different addresses. How to set the different addresses Control PCB of the indoor unit (1) Remove the front grille.
  • Page 163 Others Si06-313 Others...

  • Page 164: Part 9 Appendix

    Si06-313 Part 9 Part 9 Part 9 Part 9 Appendix Appendix Appendix Appendix 1. Piping Diagrams..................156 1.1 Indoor Units ..................156 1.2 Outdoor Units ..................157 2. Wiring Diagrams..................158 2.1 Indoor Units ..................158 2.2 Outdoor Units ..................159 Appendix...

  • Page 165: Piping Diagrams

    Piping Diagrams Si06-313 Piping Diagrams Indoor Units FVKS50BVMB, FVXS50BVMB INDOOR UNIT HEAT EXCHANGER 7.0CuT MUFFLER 4.8CuT 4.8CuT CROSS FLOW FAN FAN MOTOR THERMISTOR ON HEAT EXCH. MUFFLER 7.0CuT 7.0CuT CROSS FLOW FAN FAN MOTOR FIELD PIPING 7.0CuT ( 6.4CuT ) FIELD PIPING 9.5CuT ( 12.7CuT )

  • Page 166: Outdoor Units

    Si06-313 Piping Diagrams Outdoor Units RKS50BVMB, RS50BVMB OUTDOOR UNIT HEAT EXCHANGER OUTDOOR AIR TEMPERATURE THERMISTOR 7.9CuT 12.7CuT 7.9CuT CAPILLARY TUBE 1 7.9CuT MUFFLER 7.9CuT WITH REFRIGERANT FLOW FILTER 6.4CuT 7.9CuT COOLING HEAT EXCHANGER THERMISTOR CAPILLARY TUBE 2 7.9CuT CAPILLARY TUBE 3 PROPELLER FAN MOTOR OPERATED VALVE...

  • Page 167: Wiring Diagrams

    Wiring Diagrams Si06-313 Wiring Diagrams Indoor Units FVKS50BVMB, FVXS50BVMB PCB3 3.15A → S2W ( 4 ) outdoor TRANSMISSION PCB2 FIELD WIRING. WIRELESS CIRCUIT REMOTE PCB1 CONTROLLER PCB4 : PROTECTIVE EARTH : FUSE S201 S202 H1P , H2P , H3P : PILOT LAMP : LIMIT SWITCH M1F , M2F SIGNAL...

  • Page 168: Outdoor Units

    Si06-313 Wiring Diagrams Outdoor Units RKS50BVMB, RS50BVMB PCB2 FU201 3.15A MRM20 + + + HAC1 MRM10 X11A CT1 H2 CN11 R12T CN14 3.15A TO INDOOR UNIT t˚ PCB1 S101 POWER SUPPLY ~50Hz 220-240V ~60Hz 220-230V FIELD WIRING indoor t˚ t˚ t˚...
  • Page 169 Wiring Diagrams Si06-313 Appendix...

  • Page 170: Index

    Si06-313 Index Index Index Index Numerics check No.12 ............111 check No.13 ............111 00 ................71 check No.14 ............112 3 minutes stand-by..........25, 31 check No.15 ............112 clamp plate ............128 CN11 .............. 12, 139 A1................72 CN14 .............. 12, 139 A5................73 compressor ............
  • Page 171 Si06-313 E8 ..............83 hall IC ............... 19, 75 EA ..............85 HE1 ..............12, 137 F3 ..............87 HE2 ..............12, 137 F6 ..............102 heat exchanger ..........124, 127 H6 ..............88 heat exchanger thermistor ... 26, 27, 77, 92, 119, 145 H8 ..............89 heating peak-cut control .........
  • Page 172 Si06-313 S25 ................. 10 S26 ................. 10 OL activation ............80 S301 ............... 10 ON/OFF button on indoor unit.........25 S302 ............... 10 operation lamp ............68 S31 ............10, 12, 139 outdoor air thermistor ..........92 S32 ............10, 12, 139 outdoor unit fan system check ......109 S33 ..............
  • Page 173 Si06-313 U0................99 U2................101 U4................79 V1................10 V3................12 varistor ..............10, 12 voltage detection function ........40 wide-angle louvres ..........18 wiring diagrams .............158 Index...
  • Page 174 Si06-313 Drawings & Flow Charts Drawings & Flow Charts Drawings & Flow Charts Drawings & Flow Charts ARC433A series............70 heating peak-cut control ......... 33 automatic air flow control ........19 high pressure control in cooling ......102 automatic operation..........21 Home Leave operation ........... 23 auto-swing...............18 indoor unit PCB abnormality ........
  • Page 175 Si06-313 radiation fin temperature rise ........95 remote controller .............70 service monitor PCB ..........13 service PCB ............11 shutter drive motor / shutter limit switch abnormality ......78 signal transmission error (between indoor and outdoor units) ....79 SPM ................14 target discharge pipe temperature control ....38 thermistor cooling only model ..........27 heat pump model ..........26...
  • Page 176 Head office: Zandvoordestraat 300, B-8400 Oostende, Belgium Umeda Center Bldg., 4-12, Nakazaki-Nishi 2-chome, Kita-ku, Osaka, 530-8323 Japan Tokyo office: Shinjuku Sumitomo Bldg., 6-1 Nishi-Shinjuku 2-chome, Shinjuku-ku, Tokyo, 163-0235 Japan For further improvement, specifications or designs are subject to change without prior notice. Printed in Singapore 06/2003 AK COS...

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