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Daikin FTXZ25NV1B, Service Manual

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Daikin FTXZ25NV1B Service Manual Download Page 188

Troubleshooting

SiMT041311E

173

Service Diagnosis

2.36 Outdoor Unit PCB Abnormality or Communication 

Circuit Abnormality

Error Code

U4

Method of Error 
Detection

Detection within the programme of the microcomputer

Error Decision 
Conditions

„

The programme of the microcomputer does not work in order.

„

Indoor-outdoor unit signal transmission cannot be performed for more than 15 seconds.

Supposed 
Causes

„

Power supply voltage is not as specified.

„

Improper earth work

„

Defective varistor or fuse on the outdoor unit PCB

„

Defective thermal fuse on the terminal board of the outdoor unit

„

Disconnection of connecting wires

„

Defective outdoor unit PCB

„

Noise

„

Disturbed power supply waveform

„

Wrong wiring

„

Improper insulation of the connecting wires and earth

„

Defective indoor unit PCB

Summary of Contents for FTXZ25NV1B

Page 1: ...Service Manual Applied Models z Inverter Pair Heat Pump Inverter Pair Wall Mounted Type FTXZ N Series SiMT041311E ...

Page 2: ...SiMT041311E i Table of Contents Inverter Pair Wall Mounted Type FTXZ N Series zHeat Pump Indoor Unit FTXZ25NV1B FTXZ35NV1B FTXZ50NV1B Outdoor Unit RXZ25NV1B RXZ35NV1B RXZ50NV1B ...

Page 3: ... Operation 27 1 8 AUTO Operation 30 1 9 Sensor Operation 31 1 10 ECONO OUTDOOR UNIT QUIET Operation 33 1 11 POWERFUL Operation 34 1 12 Air Purifying and Ventilation 35 1 13 MOLD PROOF Operation 38 1 14 CLEANING FILTER Operation 38 1 15 INFORMATION 40 1 16 Brightness Setting of Indoor Unit Lamps 40 1 17 TIMER Operation 41 1 18 COMFORT SLEEP TIMER Operation 42 1 19 QUICK HEATING TIMER Operation 42 1...

Page 4: ...Abnormality 141 2 15 Outdoor Unit PCB Abnormality 142 2 16 OL Activation Compressor Overload 143 2 17 Compressor Lock 145 2 18 DC Fan Lock 146 2 19 Input Overcurrent Detection 147 2 20 Four Way Valve Abnormality 148 2 21 Discharge Pipe Temperature Control 150 2 22 High Pressure Control in Cooling 151 2 23 Compressor System Sensor Abnormality 152 2 24 Power Factor Correction Circuit Abnormality 153...

Page 5: ...heck 185 3 9 Rotating Pulse Check on Outdoor Unit PCB 187 3 10 Installation Condition Check 188 3 11 Discharge Pressure Check 188 3 12 Outdoor Fan System Check 189 3 13 Main Circuit Short Check 189 3 14 Power Module Check 190 Part 7 Tips for Servicing 191 1 Tips for Servicing 192 1 1 Pump Down Operation 192 1 2 Forced Cooling Operation 192 2 Trial Operation 193 3 Field Settings 194 3 1 SET UP Menu...

Page 6: ... Warning Do not store the equipment in a room with successive fire sources e g naked flame gas appliance electric heater Be sure to disconnect the power cable plug from the plug socket before disassembling the equipment for repair Working on the equipment that is connected to the power supply may cause an electrical shock If it is necessary to supply power to the equipment to conduct the repair or...

Page 7: ...2 in the refrigerant system If air enters the refrigerating system an excessively high pressure results causing equipment damage and injury Warning Caution Do not repair the electrical components with wet hands Working on the equipment with wet hands may cause an electrical shock Do not clean the air conditioner by splashing water Washing the unit with water may cause an electrical shock Be sure t...

Page 8: ... Fire extinguishing equipment If any hot work is to be conducted on the refrigeration equipment or any associated parts appropriate fire extinguishing equipment shall be made available at hand Prepare a dry powder or CO2 fire extinguisher adjacent to the working area No ignition sources During work on a refrigeration system which involves exposing any piping work that contains or has contained R 3...

Page 9: ...mes Repairs to sealed components During repairs to sealed components all electrical supplies shall be disconnected from the equipment being worked upon before the removal of any sealed covers etc If it is absolutely necessary to have power supplied to equipment during servicing continuously operating leak detection shall be installed at the most dangerous point of the system in order to warn of a ...

Page 10: ...ken into consideration The following procedure shall be adhered to Remove refrigerant Purge the circuit with inert gas Evacuate the inert gas Purge again with inert gas Carry out cutting or brazing of the circuit The refrigerant shall be recovered into the correct recovery cylinders The system shall be cleaned with OFN to render the unit safe Flushing This process may need to be repeated several t...

Page 11: ...els on the equipment stating the equipment contains R 32 Refrigerant recovery When removing refrigerant from a system either for servicing or decommissioning it is recommended to conduct training so that all refrigerants can be removed safely When transferring refrigerant into cylinders ensure that only appropriate refrigerant recovery cylinders are used Ensure that the correct number of cylinders...

Page 12: ...een the indoor and outdoor units Make the connections securely and route the cable properly so that there is no force pulling the cable at the connection terminals Improper connections may cause excessive heat generation or fire 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 ...

Page 13: ... on the window frame If the unit is not securely mounted it may fall and cause injury For unitary type only When replacing the coin battery in the remote controller be sure to dispose of the old battery to prevent children from swallowing it If a child swallows the coin battery see a doctor immediately Warning Caution Installation of a leakage breaker is necessary in some cases depending on the co...

Page 14: ...ation may cause an electrical shock Be sure to check the drainage of the indoor unit after the repair Faulty drainage may cause the water to enter the room and wet the furniture and floor Do not tilt the unit when removing it The water inside the unit may spill and wet the furniture and floor Be sure to install the packing and seal on the installation frame properly If the packing and seal are not...

Page 15: ...tion is used when there is danger that the reader through incorrect manipulation may damage equipment loose data get an unexpected result or has to restart part of a procedure Note Note A Note provides information that is not indispensable but may nevertheless be valuable to the reader such as tips and tricks Reference A Reference guides the reader to other places in this binder or in this manual ...

Page 16: ...SiMT041311E 1 List of Functions Part 1 List of Functions 1 Functions 2 ...

Page 17: ...hanger z Comfort airflow with INTELLIGENT EYE sensor z Mould proof indoor heat exchanger z Circulation airflow z COOLING BREEZE operation z Washable upper grille z BREEZE airflow z Wipe clean flat panel z z Living Convenience Auto fan speed z z Comfortable Temperature Hot start function z z Indoor unit quiet operation z z Quick warming function preheating operation z FAN ONLY operation z Inverter ...

Page 18: ...SiMT041311E 3 Specifications Part 2 Specifications 1 Specifications 4 ...

Page 19: ...rizontal Downwards Air Filter Auto cleaning filter Auto cleaning filter Running Current Rated A 0 14 0 14 0 13 0 14 0 14 0 13 0 14 0 14 0 13 0 14 0 14 0 13 Power Consumption Rated W 30 30 30 30 30 30 30 30 30 30 30 30 Power Factor Rated 97 4 93 2 96 2 97 4 93 2 96 2 97 4 93 2 96 2 97 4 93 2 96 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 295 798 372 295 798...

Page 20: ...ards Air Filter Auto cleaning filter Running Current Rated A 0 14 0 14 0 13 0 14 0 14 0 13 Power Consumption Rated W 30 30 30 30 30 30 Power Factor Rated 97 4 93 2 96 2 97 4 93 2 96 2 Temperature Control Microcomputer Control Dimensions H W D mm 295 798 372 Packaged Dimensions H W D mm 434 865 361 Weight Mass kg 15 Gross Weight Gross Mass kg 19 Sound Pressure Level H M L SL dB A 47 38 30 23 44 38 ...

Page 21: ...SiMT041311E Printed Circuit Board Connector Wiring Diagram 6 Part 3 Printed Circuit Board Connector Wiring Diagram 1 Indoor Unit 7 2 Outdoor Unit 9 ...

Page 22: ...onnector for swing motors and humidity sensor PCB A5P 5 S44 Connector for brush motor filter motors limit switch for brush 6 S46 Connector for signal receiver display PCB A2P 7 S52 Connector for high voltage unit PCB A3P 8 S53 Connector for limit switch for streamer 9 S200 Connector for fan motor 10 H1 H2 H3 Connector for terminal board 11 FG1 Connector for frame ground 12 FU1 F1U Fuse 3 15 A 250 ...

Page 23: ...on ON OFF button 4 LED1 H1P LED for MOLD PROOF CLEANING FILTER green 5 LED2 H2P LED for timer yellow 6 LED4 H4P LED for operation green 7 LED5 H5P LED for quick heating timer red 8 TFU1 F1UT Thermal fuse 136 C 1 S401 Connector for control PCB A1P 2 B401 CN403 Connector for streamer 1 R2T on A4P Room temperature thermistor 2 R3T on A5P Humidifying thermistor LED2 LED4 LED5 LED1 TFU1 SW1 S56 S26 3P3...

Page 24: ...for humidifier fan motor 8 S80 Connector for four way valve coil 9 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 10 S91 Connector for liquid pipe thermistor 11 S101 Connector for humidifying heater 12 S501 Connector for limit switch 13 HR1 HR2 HR3 HR4 Connector for reactor 14 HK1 HK2 HK3 Connector for hygroscopic fan motor 15 HL1 HN1 S Connector for termin...

Page 25: ...041311E Outdoor Unit Printed Circuit Board Connector Wiring Diagram 10 2P345585 2 HR1 HR2 HR3 HR4 FU2 FU3 LED A HK3 S501 S21 HK2 S22 S20 S80 S72 S70 S90 S101 U V W S91 S40 HK1 FU1 V5 V3 E1 E2 S45 HL1 HN1 S ...

Page 26: ...tion 35 1 13 MOLD PROOF Operation 38 1 14 CLEANING FILTER Operation 38 1 15 INFORMATION 40 1 16 Brightness Setting of Indoor Unit Lamps 40 1 17 TIMER Operation 41 1 18 COMFORT SLEEP TIMER Operation 42 1 19 QUICK HEATING TIMER Operation 42 1 20 Other Functions 43 2 Control Specification 44 2 1 Frequency Control 44 2 2 Controls at Mode Changing Start up 46 2 3 Discharge Pipe Temperature Control 48 2...

Page 27: ...d by the following 2 parameters The load condition of the operating indoor unit The difference between the room thermistor temperature and the target temperature Additional Control Parameters The target frequency is adapted by additional parameters in the following cases Frequency restrictions Initial settings Forced cooling operation Inverter Principle To regulate the capacity a frequency control...

Page 28: ...nd cooling Once the set temperature is reached the energy saving operation enables to maintain the room temperature at low power Frequency Limits The following functions regulate the minimum and maximum frequency Forced Cooling Operation Refer to page 192 for details Refrigerant circulation rate high high f low f freq variable Refrigerant circulation rate low high speed low speed R2812 Amount of h...

Page 29: ...MID HEATING FLASH STREAMER AIR PURIFYING only FRESH AIR SUPPLY VENTILATION only Lower limit of COOLING SARARA DRY DRY COOLING Lower limit of HEATING URURU HUMIDITY HUMID HEATING FLASH STREAMER AIR PURIFYING only FRESH AIR SUPPLY VENTILATION only Upper limit of COOLING SARARA DRY DRY COOLING FLASH STREAMER AIR PURIFYING only FRESH AIR SUPPLY VENTILATION only Upper limit of HEATING URURU HUMIDITY HU...

Page 30: ...but also vertically The flaps are set facing higher than the usual position so as to turn the airflow toward the ceiling Circulation Airflow BREEZE Airflow When the up down airflow direction is set to BREEZE BREEZE airflow starts generating breeze like airflow There are several patterns of swinging main flap lower and auxiliary flap upper with intervals These patterns appear in random order While ...

Page 31: ...culation airflow switches to BREEZE airflow when the conditions below continue for 10 minutes 1 Thermostat off OR 2 Temperature difference is in the range of zone E or lower SARARA DRY When the up down airflow direction is set to Circulation circulation airflow starts When the up down airflow direction is set to AUTO operation starts in circulation airflow then switches to BREEZE airflow when the ...

Page 32: ...ion airflow for 1 minute Operation is shifted from comfort airflow to circulation airflow when the conditions below continue for 5 minutes URURU HUMIDIFY When the up down airflow direction is set to AUTO circulation airflow starts Zone Compressor frequency A E 2 5 2 0 1 5 1 0 0 5 0 0 5 1 0 1 5 2 0 A B C D E F G H I J Increases when the operation starts Decreasing Increasing A B C D E F G H I J K L...

Page 33: ...at exchanger temperature and the difference between the room thermistor temperature and the target temperature Indoor Unit Quiet Operation Forced dropping of the fan tap decreases the airflow rate and reduces airflow noise Noise is reduced by about 3 dB as compared to that in L tap Note Airflow rate can not be set Since the performance is lowered as compared to that in normal operation 70 under ra...

Page 34: ... returns to the zone C after being in the zone A The system resumes from defrost control in any zones except A The operation turns on in any zones except A The monitoring time has passed while the temperature difference is in the zone B Cooling 10 minutes Heating 10 seconds Cooling Heating Refer to Temperature Control on page 12 for details B A OFF ON C Room thermistor temperature target temperatu...

Page 35: ...nd sent to indoor This has enabled powerful and speedy humidification The room is uniformly humidified Humidifier heating operation by air conditioner Moisture gathers around the ceiling as it is lighter than the air even if the humidifier is operated The air on the floor is kept dry R19697 URURU HUMIDIFY HUMID HEATING by taking in outdoor moisture fully humidifying the room R13859 When using humi...

Page 36: ...lation volume is high the preset temperature is high or the preset humidity is high After the HUMID HEATING operation starts the relative humidity in the room lowers temporarily This phenomenon is caused by the increase of the saturation water vapour Therefore the humidity raises gradually after the temperature reaches the preset temperature In the humidifying operation the operation sound increas...

Page 37: ...y 5 Room humidity is under 70 RH Note Exclude the case when it is recovered from thermostat off or when the defrost operation finished How to Check the Motion of Humidifying Operation You can check whether the humidifier unit is in good working order If you conduct humidifying trial operation you can check even beyond the range of the normal conditions for humidifying operation 1 Hygroscopic fan C...

Page 38: ...ions room size ventilation frequency number of residents etc and set temperature higher temperature may result in unsatisfactory humidity 90 100 Humidity 80 70 60 50 40 30 20 10 0 20 40 60 80 100 Time min 17 C Set temp HUMID HEATING start 20 C 23 C Humidity Fluctuation on HUMID HEATING Operation R13861 Measurement conditions Outdoor temp 7 C Humidity setting CONT continuous Airflow rate setting H ...

Page 39: ...idified air are recorded if the following conditions are met The discharge temperature of the humidified air is lower than 28 C AND The rotation speed of the humidifying rotor is higher than the previous record The system extracts the highest and the lowest values of the temperature and humidity of the humidified air from the latest record and past 6 data When the following conditions are met the ...

Page 40: ...idity of the discharged air by ventilation rate 16 m2 hose length 4 m 25 class 1 Outdoor temp 0 CDB 50 RH 2 Outdoor temp 7 CDB 87 RH 2 4 6 8 10 80 100 120 Hose length m R13869 Humidifying capacity ratio 7 5 m as 100 R13870 100 90 80 70 60 50 40 30 20 10 0 Ventilation rate times hour 17 C 20 C 23 C 0 0 2 0 4 0 6 0 8 1 1 2 1 4 1 6 1 8 Room humidity RH Set temperature 100 0 10 20 30 40 50 60 70 80 90...

Page 41: ...mp 23 CDB 0 10 5 0 5 10 15 20 10 20 30 40 50 60 70 80 90 100 Room humidity RH Outdoor temperature C Outdoor relative humidity 80 RH 60 RH 40 RH R13872 0 10 5 0 5 10 15 20 10 20 30 40 50 60 70 80 90 100 Room humidity RH Outdoor temperature C Outdoor relative humidity 80 RH 60 RH 40 RH R13873 0 10 5 0 5 10 15 20 10 20 30 40 50 60 70 80 90 100 Room humidity RH Outdoor temperature C Outdoor relative h...

Page 42: ...to the required dehumidifying amount The larger smaller the required dehumidifying amount the larger smaller the heat exchange area Note When the required dehumidifying amount is large the amount of room air mixed with dehumidified cool air is small Therefore the room temperature drops according to the decrease of the discharge air temperature R19699 DRY COOLING SARARA DRY Automatically changes th...

Page 43: ... dehumidifying amount is the larger the effective airflow rate for dehumidifying becomes Consequently the available volume of room air to be mixed and the discharge air temperature also decrease Reference Data for SARARA DRY Operation Condition Room temperature 24 CDB 60 RH 18 5 CWB Outdoor temperature 24 CDB 80 RH 21 5 CWB Note The larger the required dehumidifying amount is the more the sensible...

Page 44: ...us and MOISTURISING The target humidity cannot be set by Time MOISTURISING 65 DRY COOLING 50 60 Room humidity Rotation speed of indoor unit fan Humidity in COOLING DRY COOLING operation Raise humidity to 65 Humidity MOISTURISING setting keeps the humidity 65 Being unlike ordinary DRY COOLING it prevents the room from drying R19669 ...

Page 45: ...alue 1 The set temperature Ts determines the target temperature Tt Ts 18 30 C 2 The target temperature Tt is calculated as Tt Ts C where C is the correction value C 0 C 3 Thermostat ON OFF point and operation mode switching point are as follows Tr means the room thermistor temperature 1 Heating Cooling switching point Tr Tt 2 5 C 2 Cooling Heating switching point Tr Tt 2 5 C 3 Thermostat ON OFF po...

Page 46: ...n remote controller Comfort Adjusts the airflow direction to avoid directly blowing at a person Focus Adjusts the airflow direction to directly blow at a person Flap movement 1 When Comfort is set and the INTELLIGENT EYE sensor detects a person Horizontal flap It blows air downward in heating operation upward in cooling operation Vertical flap It adjusts the airflow to avoid directly blowing at a ...

Page 47: ...ower Note For dry operation you cannot set the temperature with a remote controller but the target temperature is shifted internally 1 9 2 AUTO OFF Operation When the INTELLIGENT EYE sensor judges that there is no one in the room the set temperature is shifted by 2 C in COOLING 2 C in HEATING operation When the set time elapses with no change in the condition the air conditioner automatically stop...

Page 48: ...CONO operation can be available when the unit is running ECONO operation and POWERFUL operation cannot be used at the same time The latest command has the priority 1 10 2 OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET operation lowers the noise level of the outdoor unit by changing the frequency and fan speed on the outdoor unit This function is useful when you need to consider minimising noise i...

Page 49: ... Operating sound becomes slightly loud It is impossible to change the airflow rate temperature and humidity The airflow rate and the compressor rotating speed are increased from the normal operation for 20 minutes Normal operation resumes automatically in 20 minutes During POWERFUL operation fan rotates at H tap 80 rpm POWERFUL R19707 ...

Page 50: ...gy electron and powerfully decomposes odour bacteria and hazardous chemical materials at the oxidative distraction speed of 1000 times higher than the general glow discharge Removing Formaldehyde R19708 FLASH STREAMER AIR PURIFYING FRESH AIR SUPPLY VENTILATION 0 35 0 3 0 25 0 2 0 15 0 1 0 08 0 05 0 100 0 200 300 400 The formaldehyde concentration in the laboratory 10 m2 at 0 5 time natural ventila...

Page 51: ...ases NOX SOX Manganese catalyst used to treat the automotive exhaust gas is adopted for the thermal catalyst 2 Purifying air in the indoor unit The air supply filter is placed at the humidifying hose outlet of the indoor unit side The air supply filter removes about 97 pollen and dust Ammonia Acetaldehyde Acetic Acid Cigarette Odour Removal 90 6 76 5 87 2 82 7 Odour removal performance of FLASH ST...

Page 52: ...ply filter are decomposed by FLASH STREAMER and photocatalyst Ventilation System The ventilation type is mainly divided into two The convenient system is supply ventilation Quiet because the ventilation fan is located in the outdoor unit Energy saving system due to low heat loss The room temperature changes little because no wind enters Operation noise is heard because the ventilation fan is locat...

Page 53: ...NING FILTER Operation Operation Automatic or manual operation can be selected It takes about 11 minutes for cleaning Refer to the operation manual for details Detail CLEANING FILTER operation manual The unit only accepts the CLEANING FILTER operation signal sent from the remote controller while it is not operating As the unit is not considered to be operating during MOLD PROOF operation MOLD PROOF...

Page 54: ...mpressor operates for more than 30 minutes continuously it is considered that the room temperature has come closer to the target temperature Note CLEANING FILTER operation manual automatic forced will not start under the below conditions When a filter malfunction is detected determined by the signal from the filter position sensor While the MOLD PROOF CLEANING FILTER lamp green is blinking When th...

Page 55: ...consumption are displayed Point the remote controller at the indoor unit for 2 seconds Refer to the operation manual for details 1 16 Brightness Setting of Indoor Unit Lamps The brightness of the indoor unit lamps can be adjusted HIGH LOW or OFF Refer to the operation manual for details R19711 INFORMATION R19712 Brightness setting ...

Page 56: ...ure and the outdoor temperature before preset time and operation starts automatically about 1 hour before so that the room temperature becomes optimum at the preset time 1 17 2 COUNTDOWN OFF Timer Operation Refer to the operation manual for details Features The COUNTDOWN OFF timer can be set by simple button pressing The operation is stopped when the set time comes The time can be set in the unit ...

Page 57: ...d the indoor unit blowing warm air at a weak airflow rate The warm zone ranges about 1 5 m from the air conditioner Preparatory heating operation preheats 30 minutes before and after the set time for QUICK HEATING TIMER to be able to start heating operation quickly at any time Operation Refer to the operation manual for details R19715 COMFORT SLEEP TIMER 30 min 30 min Wake up time preset QUICK HEA...

Page 58: ...it Press this button once to start operation Press once again to stop it This button is useful when the remote controller is missing or the battery has run out The operation mode refers to the following table Forced cooling operation Forced cooling operation can be started by pressing the ON OFF button for 5 9 seconds while the unit is not operating Refer to page 192 for detail Note When the ON OF...

Page 59: ...ating peak cut freeze up protection defrost control 3 Determine lower limit frequency The maximum value is set as an lower limit frequency among the frequency lower limits of the following functions Four way valve operation compensation draught prevention pressure difference upkeep 4 Determine prohibited frequency There is a certain prohibited frequency such as a power supply frequency Command fre...

Page 60: ...ted according to the D value When the D value is low the frequency is lowered When the D value is high the frequency is increased 3 Frequency control when other controls are functioning When frequency is dropping Frequency control is carried out only when the frequency drops For limiting lower limit Frequency control is carried out only when the frequency rises 4 Upper and lower limit of frequency...

Page 61: ...f four way valve The four way valve coil is energised for 160 seconds after the operation is stopped 2 2 3 Four Way Valve Operation Compensation Outline At the beginning of the 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 Detail Starting Cond...

Page 62: ...off The function is not activated when defrosting 2 2 5 Compressor Protection Function When turning the compressor from OFF to ON the upper limit of frequency is set as follows The function is not activated when defrosting A Hz 52 B Hz 68 C Hz 80 D Hz 98 E seconds 120 F seconds 120 G seconds 480 H seconds 60 sec Time R13906 Hz Frequency C D B E F G H A ...

Page 63: ...tdoor temperature c Zone Control Stop zone When the temperature reaches the stop zone the compressor stops Dropping zone The upper limit of frequency decreases Keep zone The upper limit of frequency is kept Up zone The upper limit of frequency increases Reset zone The upper limit of frequency is cancelled 105 correction value a 115 correction value a 103 correction value a 97 correction value a 85...

Page 64: ...he upper limit of the compressor frequency is defined as operation frequency 2 Hz After this the output frequency is lowered by 2 Hz every second until it reaches the keep zone Keep zone The present maximum frequency goes on Reset zone Limit of the frequency is cancelled Limitation of current dropping and stop value according to the outdoor temperature The current drops when outdoor temperature be...

Page 65: ...The upper limit of frequency decreases Keep zone The upper limit of frequency is kept Up zone The upper limit of frequency increases Reset zone The upper limit of frequency is cancelled R14746 Reset zone Indoor heat exchanger thermistor temperature Up zone Keep zone Dropping zone Stop zone 0 C 3 C 5 C 7 C 13 C Zone Control Stop zone When the temperature reaches the stop zone the compressor stops D...

Page 66: ...eating operation the unit controls the indoor heat exchanger temperatures A and B as follows if the condition D 4 continues for 60 minutes Refer to page 45 as for D When the indoor heat exchanger is not hot enough the indoor fan does not start at the set speed The fan speed increases step by step The limitation of the fan speed is lifted when the indoor heat exchanger temperature rises above H C C...

Page 67: ...exchanger is calculated with the room temperature and the indoor humidity 2 9 Outdoor Fan Control 1 Fan OFF delay when stopped The outdoor fan is turned OFF 70 seconds after the compressor stops 2 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 3 Fan OFF control during defrosting The outdoor fan is ...

Page 68: ...door heat exchanger temperature The system is in heating operation The compressor operates for 6 minutes More than 25 minutes of accumulated time have passed since the start of the operation or ending the previous defrosting Conditions for Cancelling Defrost The judgement is made with the outdoor heat exchanger temperature 6 30 C Frequency Compressor Four way valve Fan ON OFF ON OFF ON OFF 0 Hz 0 ...

Page 69: ...onic expansion valve control when the discharge pipe thermistor is disconnected Feedback Control Target discharge pipe temperature control Detail The followings are the examples of electronic expansion valve control which function in each operation mode Operation mode Main control Secondary control Control when the frequency changes High discharge pipe temperature control Power ON Power initialisi...

Page 70: ...sting 2 11 4 Starting Operation Control The electronic expansion valve opening is controlled when the operation starts and preventing superheating or liquid compression 2 11 5 Control when the Frequency Changes When the target discharge pipe temperature control is active if the target frequency changes to a specified value in a certain time period the target discharge pipe temperature control is c...

Page 71: ...tion is ascertained Discharge pipe temperature 6 C outdoor heat exchanger temperature 2 When the operation mode is heating When the following condition is fulfilled the discharge pipe thermistor disconnection is ascertained Discharge pipe temperature 6 C indoor heat exchanger temperature When the thermistor is disconnected When the disconnection is ascertained the compressor continues operation fo...

Page 72: ...SiMT041311E 57 Installation Operation Manual Part 5 Installation Operation Manual 1 Installation Manual 58 2 Operation Manual 77 ...

Page 73: ...stallation manual Be sure to use a dedicated power supply circuit only Insufficiency of power circuit capacity and improper workmanship may result in electric shocks or fire Use a cable of suitable length Do not use tapped wires or an extension lead as this may cause overheating electric shocks or fire Make sure that all wiring is secured the specified wires are used and that there is no strain on...

Page 74: ... a room with a floor area larger than 1 8m2 Comply with national gas regulations Do not install the air conditioner at any place where there is a danger of flammable gas leakage In the event of a gas leakage build up of gas near the air conditioner may cause a fire to break out While following the instructions in this installation manual install drain piping to ensure proper drainage and insulate ...

Page 75: ... 12L 1 the restrictions on installation specified in Indoor Outdoor Unit Installation Drawings on page 6 are met 2 both air inlet and outlet are free of obstructions 3 the unit is not in the path of direct sunlight 4 the unit is away from the source of heat or steam 5 there is no source of machine oil vapour this may shorten indoor unit life 6 cool warm air is circulated throughout the room 7 the ...

Page 76: ...ay from television and radio sets This is to prevent interference to images and sounds Noises may be heard even if they are more than 3m away depending on radio wave conditions 9 the unit is not directly exposed to salt sulfidized gases or machine oil vapour they may shorten outdoor unit life 10 nothing which must be kept away from moisture is under the unit since drain flows out of the outdoor un...

Page 77: ...tape making sure that no gap is left in the insulation pipe s cut line Refrigerant piping must be protected from physical damage Install a plastic cover or equivalent Allow 300mm of work space below the ceiling surface Foot bolt hole centres Where there is a danger of the unit falling use foot bolts or wires In sites with poor drainage use block bases for outdoor unit Adjust foot height until the ...

Page 78: ... Position the end of a tape measure at For walls containing metal frame or metal board be sure to use a wall embedded pipe and wall hole cover in the feed through hole to prevent possible heat electrical shock or fire Be sure to caulk the gaps around the pipes with caulking material to prevent water leakage 1 Bore a feed through hole of 65mm in the wall so it has a down slope toward the outside 2 ...

Page 79: ...ont grille removed Insert as far as possible so that there are no gaps G Humidifying hose To pull out the G humidifying hose to the right side turn the cuff 180 from the position shown in the above illustration Cut the skirt section of the cuff with scissors cut the dotted line section Insert each G humidifying hose to the rim of the J joint or an elbow field supply so that there are no gaps Apply...

Page 80: ...downward slope It is recommended to use an elbow field supply Remove pipe port cover 1 Wrap the pipes hose and inter unit wire using insulation tape as shown in the piping bundle diagram 2 Put all the pipes through the through hole in the wall and hook the indoor unit onto the A mounting plate 3 Connect the pipes Remove pipe port cover Remove pipe port cover 1 Replace the drain plug and drain hose...

Page 81: ...ires to make sure that they are securely latched up then retain wires with wire retainer 5 In case of connecting to the HA system Run the HA connection cord and attach the S21 Refer to Connecting to the HA system on page 18 6 Shape the wires so that the service lid fits securely then close the service lid Shape wires so that the service lid will fit securely Firmly secure wire retainer so that wir...

Page 82: ... 5 When connecting a rigid polyvinyl chloride pipe nominal diameter 13mm directly to the drain hose attached to the indoor unit as with embedded piping work use any commercially available drain socket nominal diameter 13mm as a joint We recommend screwing the indoor unit onto a A mounting plate in order to improve the installation strength 1 Remove the pipe cover of the front grille bottom 4 tabs ...

Page 83: ...vailable on the market It is best to screw in the foundation bolts until their ends are 20mm from the foundation surface 1 When installing the outdoor unit refer to Choosing an Installation Site on page 5 and the Indoor Outdoor Unit Installation Drawings on page 6 2 If drain work is necessary follow the procedures below 1 Use H drain socket for drainage 2 If the drain port is covered by a mounting...

Page 84: ...ge to the flare nuts and gas leakage Align the centres of both flares and tighten the flare nuts 3 or 4 turns by hand Then tighten them fully with the torque wrenches Refrigerant oil for R410A can also be used for application to the inner flare Do not apply refrigeration oil to the outer surface Apply refrigeration oil to the inner surface of the flare Do not apply refrigeration oil to the flare n...

Page 85: ...um pumping and make sure that the compound pressure gauge reads 0 1MPa 76cmHg The vacuum pump should run for at least 10 minutes 4 Close gauge manifold s low pressure valve Lo and stop vacuum pump Keep this state for a few minutes to make sure that the compound pressure gauge pointer does not swing back 1 5 Remove covers from liquid stop valve and gas stop valve 6 Turn the liquid stop valve s rod ...

Page 86: ... not turn on the circuit breaker until all work is completed 1 Strip the insulation from the wire 20mm 2 Connect the inter unit wires between the indoor and outdoor units so that the terminal numbers match Tighten the terminal screws securely We recommend a flathead screwdriver be used to tighten the screws The screws are packed with the terminal block When using stranded wires make sure to use a ...

Page 87: ...n is established between the unit and the remote controller 1 Press for at least 5 seconds 4 Press and set the humidifying hose length 5 When you set the humidifying hose length press 6 Press 2 Press Select Hose length 3 Press to enter the humidifying hose length setting mode The default menu is displayed To exit the menu press or leave it unoperated for 60 seconds The display will return to the n...

Page 88: ...panel shaft Front panel shaft Insert the right and left front panel shafts on the front panel into the shaft holes one at a time and slowly close the panel Press on both sides of the front panel 1 Remove the front panel 2 Direct the flap and the auxiliary flap downward 3 Remove the streamer unit See Fig 1 4 Remove the screws that secure the front grille right 3 screws See Fig 2 5 While lifting up ...

Page 89: ...resses Change the address setting of one of the two units For details refer to the operation manual Connecting to the HA system Wired remote controller central remote controller etc 1 Remove the front panel streamer unit and front grille right 3 screws Refer to page 17 2 Remove the electrical wiring box cover 3 tabs 3 Insert the HA connection cord into the HA connector S21 white 4 Route the HA con...

Page 90: ... front panel and remove the dust box Pull down the filter stopper frame yellow on the right side 2 Direct the display unit black upward and remove the air filter 3 Install the B photocatalytic air purifying and deodorising filter 4 Restore the air filter and the dust box to the original positions 3 1 Measure the supply voltage and make sure that it falls in the specified range 3 2 Trial operation ...

Page 91: ...e sure that the air conditioner is not in operation before performing CLEANING FILTER operation 1 Press for at least 5 seconds The default menu will be displayed 2 Press to select Test mode and press The unit enters trial operation mode and is displayed on the screen 3 Press the button for the operation mode COOLING HEATING HUMIDFY you want to test Trial operation will stop automatically after abo...

Page 92: ... malfunctioning product or injury damage may result due to contact with the air conditioner s high speed fan blades Do not attempt to repair dismantle reinstall or modify the air conditioner yourself as this may result in water leakage electric shocks or fire hazards Do not use flammable spray near the air conditioner or otherwise fire may result Do not use a refrigerant other than the one indicat...

Page 93: ...tion turn off the circuit breaker or remove the power cord Otherwise an electric shock and injury may result Only connect the air conditioner to the specified power supply circuit Power supplies other than the one specified may result in electric shocks overheating and fires Arrange the drain hose to ensure smooth drainage Imperfect drainage may cause wetting of the building furniture etc Do not p...

Page 94: ...pe Operation start beep beep Setting change beep long beep Auxiliary flap horizontal blade Flap horizontal blade Shutter bottom air inlet Louvres vertical blades Inside of the air outlet located on the right and left sides Display MOLD PROOF CLEANING FILTER lamp green QUICK HEATING TIMER lamp red OPERATION lamp green TIMER lamp orange Transmitter Receiver Sends receives signals to from the remote ...

Page 95: ... the outdoor air Humidifying temperature and humidity sensor Dust box Air filter white Detects the temperature and humidity of the humidified air to control the degree of humidity Scrapes dust off the air filter with the dust brush and collects it 2 locations at right and left Prevents mold and allergens with the decomposition power of the streamer discharge Photocatalytic air purifying and deodor...

Page 96: ... Sets the time until the operation stops Adjusts the airflow rate setting Adjusts the airflow rate setting Adjusts the humidity setting Starts the COOLING SARARA DRY HEATING or URURU HUMIDIFY operation Sends receives signals to from the indoor unit The remote controller must be used with the transmitter receiver pointed towards the transmitter receiver of the indoor unit Transmission will fail if ...

Page 97: ...ning indicator and streamer unit cleaning indicator RESET button Limits the maximum power consumption Reduces the noise from the outdoor unit Reduces mold and odour inside the unit Removes dirt such as dust attached to the air filter Sets the time of the clock A menu item is shown above A menu item is shown below FLASH STREAMER AIR PURIFYING FRESH AIR SUPPLY VENTILATION AUTO MOLD PROOF AUTO CLEANI...

Page 98: ...of the remote controller holder into the hole at the back of the remote controller Turn on the circuit breaker After the power is turned on the flaps of the indoor unit open and close once to set the reference position Using batteries other than AA LR6 alkaline may lead to improper operation Notes on batteries The batteries will last for about 1 year If the remote controller display begins to fade...

Page 99: ...tton the time changes by 10 minutes After CLOCK Set appears the normal screen is displayed again When the clock is set the set time is saved in the indoor unit After replacing the batteries direct the remote controller toward the indoor unit and press The time will be set automatically If 12 00 keeps on blinking follow steps 1 to 3 above To adjust the airflow properly set the INSTALLED POSITION BR...

Page 100: ...eration DRY COOLING operation HEATING operation URURU HUMIDIFY operation HUMID HEATING operation FAN ONLY operation To stop the operation Press Press To blow air To operate in appropriate operation mode COOLING or HEATING based on the set temperature and the indoor temperature Press during SARARA DRY operation to switch the operation to DRY COOLING Press while the unit is not operating Press durin...

Page 101: ...r Does not perform humidity control 1 When the temperature is changed the DRY COOLING operation starts 2 When the temperature is changed the HUMID HEATING operation starts 3 When the humidity is lowered the DRY COOLING operation starts 4 When OFF is selected the COOLING operation starts 5 When the humidity is raised the HUMID HEATING operation starts 6 When OFF is selected the HEATING operation st...

Page 102: ... press or When the airflow is set to indoor unit quiet operation will start and the operating sound from the unit will become quieter If the temperature does not reach the desired point change the airflow rate setting Airflow rate 1 5 Set the vertical and horizontal airflow directions to Swinging To the left To the right Swinging Swinging Swinging Front blowing Wide AUTO BREEZE Swinging Circulatio...

Page 103: ...culated in the whole room by taking air from the shutter bottom air inlet to eliminate the temperature variation BREEZE airflow This setting automatically adjusts the airflow rate and vertical airflow direction to generate a breeze like airflow It is a comfortable airflow even when it blows on your body Airflow direction setting Settings of AUTO Circulation and BREEZE airflow in each operation mod...

Page 104: ...on The INTELLIGENT EYE sensor detects the movements of a person heat generating object to confirm where people are Example for Comfort Page 16 The maximum distance that people can be detected is about 9m in front of the indoor unit The movement of small animals including dogs and cats or a temperature change due to a heat generating object such as another heating appliance or electrical appliance ...

Page 105: ... 3 Area INTELLIGENT EYE and AUTO OFF operations Whether to blow air away from a person or not can be set according to your preference The INTELLIGENT EYE sensor detects the movement of a person and automatically changes the airflow direction When the INTELLIGENT EYE sensor judges that there is no one in the room it changes the set temperature 2 C in COOLING 2 C in HEATING operation When the set ti...

Page 106: ... setting 2 Press to select the item and press Setting change TIMER cancel To use the timer This function controls the operation start and stop time When you set the timer you can select the operation frequency either once or daily 1 Follow steps 1 and 2 above and then select the TIMER you want to change The time that was set last is displayed from the second time Each time you press the time chang...

Page 107: ... each time The time can be set in increments of 30 minutes each time the button is pressed from 30 minutes to 9 hours 30 minutes Setting is canceled Remaining time 30 minutes Remaining time 9 hours 30 minutes and remaining time until the scheduled stop are displayed on the LCD The TIMER lamp orange lights up The TIMER lamp goes out OFF TIMER is set to 0 00 or COUNTDOWN OFF TIMER is set to turn off...

Page 108: ...setting 2 Press to select the item and press Setting change TIMER cancel COMFORT SLEEP TIMER operation keeps the indoor temperature and humidity at suitable levels for a comfortable sleep and refreshing morning The time that was set last is displayed from the second time Each time you press the time changes by 10 minutes If you press and hold the button the time changes continuously When this time...

Page 109: ...After the COMFORT SLEEP TIMER operation is finished the operation displayed on the remote controller will continue If you set the COMFORT SLEEP TIMER while the ON TIMER is set the ON TIMER will be cancelled Once COMFORT SLEEP TIMER operation starts the temperature will be lowered 2 C in the next 3 hours and then raised 1 C one hour before you wake up V shaped temperature control V shaped temperatu...

Page 110: ...top the operation When the operation stops defrosting operation automatically starts night defrosting What happens in the morning This operation quickly blows warm air when the HEATING operation starts in the morning and makes a warm space warmth zone around the indoor unit Each time you press the time changes by 10 minutes If you press and hold the button the time changes continuously QUICK HEATI...

Page 111: ... lamp dark red lights up Preparatory heating operation is running QUICK HEATING TIMER lamp bright red lights up Normal HEATING operation is running OPERATION lamp green lights up QUICK HEATING TIMER operation is running QUICK HEATING TIMER lamp bright red and OPERATION lamp green light up To blow warm air quickly preparatory heating operation is performed for about 30 minutes before and after the ...

Page 112: ... which were used before POWERFUL operation Temperature and airflow rate cannot be changed disappears from the LCD The operation mode returns to the previous setting POWERFUL operation is cancelled when the direct operation buttons or is pressed The unit s operating sound becomes louder during operation You may not feel sufficient warmth for a while after the operation starts because this operation...

Page 113: ...ration Flash streamer discharge decomposes mold and allergic substances to clean the air in the room 1 Ventilation is performed at an automatically adjusted airflow rate 2 Ventilation is performed at a high airflow rate or is displayed on the LCD These symbols are not displayed while the unit is not operating or disappears from the LCD The operation mode returns to the previous setting Sounds from...

Page 114: ...n enables efficient operation by limiting the maximum power consumption value This function is useful for ensuring a circuit breaker does not trip when the unit runs alongside other appliances OUTDOOR UNIT QUIET operation lowers the noise level of the outdoor unit by changing the frequency and fan speed on the outdoor unit This function is useful when you need to consider minimizing noise in your ...

Page 115: ...settings to be cancelled and disappears from the LCD If the level of power consumption is already low ECONO operation will not lower the power consumption POWERFUL and ECONO operation cannot be used at the same time Priority is given to the function of whichever button is pressed POWERFUL operation and OUTDOOR UNIT QUIET operation cannot be used at the same time Priority is given to the function o...

Page 116: ...operation is displayed on the LCD MOLD PROOF operation automatically dries the inside of the air conditioner each time after the COOLING SARARA DRY or DRY COOLING operation is stopped The MOLD PROOF CLEANING FILTER lamp green lights up The operation stops automatically in 100 minutes disappears from the LCD Press for about 2 seconds while the unit is not operating MOLD PROOF is displayed on the LC...

Page 117: ...ner has continued to operate for 24 hours or longer the operation is suspended and the CLEANING FILTER operation is started After cleaning is completed the air conditioner restarts including 24 HOUR FRESH AIR SUPPLY VENTILATION MOLD PROOF CLEANING FILTER lamp green The MOLD PROOF CLEANING FILTER lamp goes out FILTER CLEAN is displayed on the LCD and the display returns to normal after a while The ...

Page 118: ...t box In an environment where oil or nicotine is attached to the air filter the filter may not be completely cleaned by the CLEANING FILTER operation and you may need to clean the air filter by yourself You can remove the air filters and clean them manually as well When the indoor temperature is lower than 10 C the CLEANING FILTER operation will not start to protect the air filters The CLEANING FI...

Page 119: ...mperatures near the indoor and outdoor units based on the temperatures detected by the sensor attached to the indoor and outdoor units If the signals from the remote controller do not properly reach the indoor unit the setting displayed on the LCD may be different from the actual operation of the indoor unit If you press in that condition the operation of the indoor unit will be changed according ...

Page 120: ...in except when setting CHILD LOCK The menu screen will return to the original screen if no operation is made for about 1 minute Menu settings You can change the default settings according to your room s environment and your taste To change the setting INTELLIG EYE AIRFLOW AUTO OFF time BREEZE AIRFLOW HUMIDIFY AIRFLOW CONTINUE DRY INSTALLED POSITION RESET USED POWER SOUND VOLUME CONTRAST 24 HOUR FR...

Page 121: ...he set temperature 2 C in COOLING 2 C in HEATING and the operation stops after the preset time elapses if it is judged that no one is in the room 3 minutes before the operation stops the OPERATION lamp blinks to lower the airflow rate After that the operation stops In this mode the operation stops automatically It is recommended to set the AUTO OFF operation to Off if a small child or a sick perso...

Page 122: ... to the room shape If you do not set the right corner and left corner correctly the airflow direction may not be properly controlled in some airflow settings The airflow direction range at the horizontal airflow setting airflow direction that can be selected with will change according to the settings for the installation position When the distance is 2 to 50cm set to the left corner When the unit ...

Page 123: ...contrast of the LCD Description Setting Menu No The default setting is 1 for both the indoor unit and remote controller To set the address to 2 1 Open the front panel and turn on the circuit breaker 2 Press 3 Press to select RC ADDRESS and press 4 Press to select 2 5 Press for 2 seconds and send a signal to the indoor unit The OPERATION lamp green blinks for about 1 minute This is not an error bli...

Page 124: ...id stable base and take care not to fall When removing and attaching the front panel support the panel securely with your hands to prevent it from falling Removing the front panel Pushing further up from the stopping position allows the panel to be removed more easily 1 Turn off the circuit breaker 2 Hold the panel at both ends and open until the panel stops While pushing the left side front panel...

Page 125: ...a well ventilated shady area for about 1 day The TIMER lamp blinks to indicate that the streamer unit needs cleaning when the total operation time of the air conditioner exceeds 1 800 hours Streamer unit cleaning indicator Clean the streamer unit Streamer discharge is disabled while the lamp is blinking Removing the streamer unit Hold the grip of the streamer unit and pull it toward yourself Grip ...

Page 126: ...e body downward as dust is collected there 1 Slide the right and left fixing tabs blue inwards and slowly pull the dust box out with both hands 1 Slide the cover dark grey to the Õ direction and release the lock 2 Turn the cover to open the dust box CLEANING FILTER operation will not be correctly performed if the tabs are not securely locked Removing or attaching the dust brush 1 Pull the centre o...

Page 127: ...tely soak the filter in lukewarm water with neutral liquid detergent and clean with a sponge After washing the filter drain it Smooth the filter by hand and dry it well in the shade Do not disassemble the air filter When When you find dirt or dust If the AUTO CLEANING FILTER operation is set to On basically no care is required When you are aware of dirt such as when oil or nicotine is attached to ...

Page 128: ...formed properly if the photocatalytic air purifying and deodorising filter is not attached correctly After cleaning start the CLEANING FILTER operation to check that the air filter operates correctly Dispose of old filters as non flammable waste To order a photocatalytic air purifying and deodorising filter contact the service shop where you bought the air conditioner Photocatalytic air purifying ...

Page 129: ...on Is any foreign object stuck in the outdoor unit fan Turn off the circuit breaker and then remove foreign objects Is the air outlet of the outdoor unit blocked by a car or the like Turn off the circuit breaker and then remove the obstruction Turn on the circuit breaker and start operation Check the model name or control code and contact the service shop 3 Check the OPERATION lamp again and take ...

Page 130: ...Moisture in the air condenses into water on the cool surface of outdoor unit piping and drips This is a sound generated when humidified air or ventilated air is discharged Operating sound may vary depending on the outdoor temperature or humidity This is a sound of ventilating operation When ventilating operation is combined with COOLING HEATING operation it is possible to stop only ventilating ope...

Page 131: ...TION lamp is blinking For system protection the air conditioner may stop operating on a sudden large voltage fluctuation It automatically resumes operation in about 3 minutes Is there anything blocking the air inlet or air outlet of the indoor unit or outdoor unit Stop operation and after turning off the circuit breaker remove the obstruction Then restart operation with the remote controller If th...

Page 132: ...The air conditioner may take in an odour from outside Stop humidifying operation and remove the cause of the odour When operation is switched to SARARA DRY operation the humidity may increase temporarily which may generate an odour The room odour absorbed in the unit is discharged with the airflow We recommend you to have the indoor unit cleaned Consult the service shop The air outlet may give out...

Page 133: ... and then lights up The TIMER lamp blinks The MOLD PROOF CLEANING FILTER lamp blinks The MOLD PROOF CLEANING FILTER lamp blinks even after the dust box is cleaned There is a sign of burning on the metal section of the streamer unit FLASH STREAMER AIR PURIFYING operation cannot be performed The sound of streamer discharge stopped This is a sign of streamer discharge and normal Is the front panel op...

Page 134: ...nction CLEANING FILTER operation is long The air filter gets stuck during CLEANING FILTER operation This is to quickly reduce the humidity Cold air comes out of the air conditioner when SARARA DRY operation is started The air conditioner may perform weak HEATING operation when the indoor temperature becomes low Warm air comes out of the air conditioner during URURU HUMIDIFY operation The air condi...

Page 135: ...n on a sunny day to dry the inside well How to perform MOLD PROOF operation 2 After operation is stopped turn off the circuit breaker for the air conditioner 3 Remove the batteries from the remote controller To resume using the air conditioner turn on the circuit breaker The air conditioner performs the operating check of each part Your product and the batteries supplied with the controller are ma...

Page 136: ...141 2 15 Outdoor Unit PCB Abnormality 142 2 16 OL Activation Compressor Overload 143 2 17 Compressor Lock 145 2 18 DC Fan Lock 146 2 19 Input Overcurrent Detection 147 2 20 Four Way Valve Abnormality 148 2 21 Discharge Pipe Temperature Control 150 2 22 High Pressure Control in Cooling 151 2 23 Compressor System Sensor Abnormality 152 2 24 Power Factor Correction Circuit Abnormality 153 2 25 Positi...

Page 137: ...2 Fan Motor Connector Output Check 182 3 3 Humidity Sensor Check 182 3 4 Power Supply Waveforms Check 183 3 5 Electronic Expansion Valve Check 183 3 6 Four Way Valve Performance Check 184 3 7 Inverter Unit Refrigerant System Check 184 3 8 Inverter Analyser Check 185 3 9 Rotating Pulse Check on Outdoor Unit PCB 187 3 10 Installation Condition Check 188 3 11 Discharge Pressure Check 188 3 12 Outdoor...

Page 138: ...nits In either case conduct the diagnostic procedure described in the following pages 1 2 Outdoor Unit The outdoor unit has one green LED LED A on the PCB When the microcomputer works in order the LED A blinks 1 3 Remote Controller Confirm the error code with the remote controller Method 1 1 Open the cover of the remote controller 2 Press the CANCEL button for 5 seconds pointing the remote control...

Page 139: ...he or button and select Checking error code 4 Press the APPLY button pointing the remote controller at the indoor unit 5 The display on the remote controller shows an error code with a long beep Note To return to the normal mode press the SET UP button for 5 seconds again or leave the remote controller untouched for 60 seconds R19723 2 3 4 3 1 R19722 5 ...

Page 140: ... control 150 F6 High pressure control in cooling 151 H0 Compressor system sensor abnormality 152 Power factor correction circuit abnormality 153 H6 Position sensor abnormality 154 H9 Outdoor temperature thermistor or related abnormality 156 J3 Discharge pipe thermistor or related abnormality 156 J6 Outdoor heat exchanger thermistor or related abnormality 156 J8 Liquid pipe thermistor or related ab...

Page 141: ...onnect the power supply of proper voltage check the varistor and the fuse Ask the electric power company Replace the fuse or the thermal fuse The 3 minute standby function is activated Operation restarts 3 minutes later Connect the wires properly Is the power supply plug inserted into the outlet or the breaker for the power supply breaker ON Caution Do the other electric appliances work NO NO NO N...

Page 142: ...peration lamp blinks Match the compatible models Replace the batteries Match the address NO Is the indoor unit compatible with the outdoor unit YES Is there a sound indicating that a signal from the remote controller is received YES YES NO NO NO Does the address of the remote controller match with that of the indoor unit YES Are the batteries in the remote controller flat Make sure that the infrar...

Page 143: ...with an appropriate model or add another unit Piping length is to be within the specified range Replace the thermistor s Change power supply installation Check detailed operating conditions diagnosis by gas pressure operation current Is the set temperature appropriate Is the power supply voltage appropriate R19679 YES NO Caution Is there required installation space Is the indoor unit compatible wi...

Page 144: ...Contact with an electric power company Provide the required space Replace the wire to the specified one Replace the outdoor unit PCB Replace the fan motor or the four way valve coil Conduct vacuum drying fill the refrigerant of specified volume Is the capacity of safety breaker as specified R19680 Caution Does the earth leakage breaker work Remove the fan motor or the four way valve coil and check...

Page 145: ...n material Separate the fan from other parts Correct by hand or install piping weight Apply sound insulation sheets of putty Conduct vacuum drying fill the refrigerant of specified volume Does the wall vibrate or chatter R19681 Caution Does the installation plate vibrate or chatter Overfilling of refrigerant Air is mixed in Flushing sound due to refrigerant shortage Is the piping secured and fixed...

Page 146: ...aution Does the set hose length match with the field hose length Is the air supply filter clogged YES NO NO YES YES NO YES NO Any breakage or blockage on humidification hose Does the length of humidification hose exceed the specified length YES NO Is the humidification hose proper Does the outdoor unit suck the exhausted air again by short circuit YES Is the room ventilated too many times Is the c...

Page 147: ...mer unit Reconnect the connectors Replace the limit switch Replace the indoor unit PCB A1P Replace the indoor unit PCB A3P 4 hooks of the front panel fastened to the front grille High voltage unit PCB A3P or its harness dirty R20442 YES NO Caution Streamer unit cleaning indicator reset Streamer unit properly installed NO YES NO NO NO YES YES YES YES NO YES NO Streamer unit dirty YES Needles of the...

Page 148: ...all animals like dogs and cats as a human motion The sensors might also detect a place of sunlight wrongly In case the sensors detect several people in a room the airflow is directed to the last detected person Replace the INTELLIGENT EYE sensor unit Check the connection of the harness Clean the front panel Clean the lens of INTELLIGENT EYE sensor unit OK Do the vertical blade respond accordingly ...

Page 149: ...ck the connection of connectors See Note Correct the connection OK Check the power supply voltage Start operation Voltage as rated Error repeats Check the power supply voltage Start operation Voltage as rated Error repeats Error repeats YES NO NO YES NO NO YES R19513 Caution To secure the connection once disconnect the connector and then reconnect it YES NO YES NO YES NO YES Match the compatible m...

Page 150: ...g operation the temperature detected by the indoor heat exchanger thermistor is used for the heating peak cut control operation halt outdoor fan stop etc Error Decision Conditions Freeze up protection control During cooling operation the indoor heat exchanger temperature is below 0 C Heating peak cut control During heating operation the indoor heat exchanger temperature is above 54 5 C Supposed Ca...

Page 151: ...heat exchanger Replace the thermistor As described in the thermistor characteristic chart Check the air filter Check for dust accumulation on the indoor heat exchanger Check the connection of the indoor heat exchanger thermistor Is there any short circuit Dirty Dirty NO Connect the connector properly OK Check the air passage Be sure to turn off the power switch before connecting or disconnecting c...

Page 152: ...normal fan motor operation Error Decision Conditions The detected rotation speed is less than 50 of HH tap when the maximum fan motor rotation speed is commanded The fan does not rotate for more than 5 seconds after operation starts Supposed Causes Remarkable decrease in power supply voltage Layer short inside the fan motor winding Breaking of wire inside the fan motor Breaking of the fan motor le...

Page 153: ... reconnect it Foreign matters in or around the fan Rotate the fan by hand Check the fan motor for breakdown or short circuit Fan rotates smoothly Resistance OK Correct the connection NO Correct the power supply Remove the foreign matters Replace the indoor fan motor Turn off the power Unplug the power cable or turn the breaker off R19724 YES NO YES Abnormal sound occurs Is the bearing rubber cushi...

Page 154: ... code is defective Defective indoor unit PCB A1P A4P Troubleshooting Check No 01 Refer to P 181 C4 Indoor heat exchanger thermistor C9 Room temperature thermistor YES R19725 NO Check No 01 Check the thermistor resistance value YES NO Caution Correct the connection C4 Replace the indoor heat exchanger thermistor C9 Replace the humidity sensor PCB A4P Replace the control PCB A1P Normal Normal Check ...

Page 155: ...ve humidity sensor Defective indoor unit PCB A1P A5P Troubleshooting Check No 01 Refer to P 181 Check No 07 Refer to P 182 YES NO Check No 07 Check the input voltage of humidity sensor YES NO 100 Ω or less Caution Correct the connection Replace the humidity sensor PCB A5P Normal Normal R19726 Check No 01 Check the thermistor resistance value YES NO Replace the humidity sensor PCB A5P Replace the c...

Page 156: ...tion of connector Defective humidity sensor Defective indoor unit PCB A1P A4P Troubleshooting Check No 07 Refer to P 182 Correct the connection Replace the humidity sensor PCB A4P Replace the control PCB A1P Normal R19683 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Check the connection of connectors Normal NO NO YES YES Check N...

Page 157: ...ning order Supposed Causes Defective outdoor unit PCB Noise Momentary drop of voltage Momentary power failure Troubleshooting R19727 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged ON or OFF Blink NO YES Turn on the power again Check if the unit is earthed Replace the outdoor unit PCB Zero cross signal abnormality Replace the outdo...

Page 158: ...tion Continuous run for about 60 minutes without any other error Supposed Causes Disconnection of discharge pipe thermistor Defective discharge pipe thermistor Disconnection of connector S40 or relay connector for OL Q1M Disconnection of 2 terminals of OL Q1M Defective OL Q1M Broken OL harness Defective electronic expansion valve or coil Defective four way valve or coil Defective outdoor unit PCB ...

Page 159: ...efrigerant line check procedure Replace the outdoor unit PCB Replace the four way valve or the coil Replace the outdoor unit PCB Discharge pipe thermistor disconnected Check No 01 Check the thermistors Check No 13 Check the four way valve Check No 14 Check the refrigerant line Check No 12 Check the electronic expansion valve Replace the relay harness Connect the connectors properly Connectors are ...

Page 160: ...ubleshooting Check No 15 Refer to P 185 Turn off the power Disconnect the harnesses U V and W R19477 Caution NO YES YES NO NO YES Check No 15 Check with the inverter analyser Turn off the power and reconnect the harnesses Turn on the power again and restart the system Correct the power supply or replace the outdoor unit PCB Inverter analyser RSUK0917C Replace the compressor Replace the compressor ...

Page 161: ...oor unit PCB is blown out Defective outdoor unit PCB Troubleshooting Check No 16 Refer to P 187 R20202 Caution YES YES NO NO YES NO YES NO YES NO Turn on the power Rotate the fan Check No 16 Check the rotation pulse input on the outdoor unit PCB Turn off the power and reconnect the connector Remove the foreign matters Replace the outdoor unit PCB Replace the outdoor fan motor Replace the fuse Chec...

Page 162: ...before connecting or disconnecting connectors or parts may be damaged An input overcurrent may result from wrong internal wiring If the system is interrupted by an input overcurrent after the wires have been disconnected and reconnected for part replacement check the wiring again R20441 NO YES YES NO Start operation and measure the input current Check No 18 Check the discharge pressure Check No 17...

Page 163: ...lowing condition continues over 10 minutes after operating for 5 minutes Cooling Dry A B 5 C Heating B A 5 C A Room thermistor temperature B Indoor heat exchanger temperature If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Disconnection of four way valve coil Defective four way valve coil or harness Defective ...

Page 164: ...clogged Reconnect the thermistor s Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged R19729 Refrigerant shortage Water mixed Stop valve Four way valve coil disconnected loose Harness out of connector Any thermistor disconnected Check No 01 Check the thermistors Check No 14 Check the refrigerant line Check No 13 Check the four way val...

Page 165: ...perature thermistor Defective electronic expansion valve or coil Refrigerant shortage Defective four way valve Water mixed in refrigerant Defective stop valve Defective outdoor unit PCB Troubleshooting Check No 01 Refer to P 181 Check No 12 Refer to P 183 Check No 14 Refer to P 184 R15825 Caution NG OK OK OK NG NG Discharge pipe thermistor Outdoor heat exchanger thermistor Outdoor temperature ther...

Page 166: ...ective outdoor unit PCB Troubleshooting Check No 01 Refer to P 181 Check No 12 Refer to P 183 Check No 17 Refer to P 188 Check No 18 Refer to P 188 Check No 19 Refer to P 189 R15667 Caution Replace the outdoor fan motor Reconnect the connector or fan motor lead wires Replace the stop valve Replace the outdoor heat exchanger thermistor Replace the outdoor unit PCB Replace the electronic expansion v...

Page 167: ... the DC current before compressor start up is out of the range 0 5 4 5 V The DC voltage before compressor start up is below 50 V Supposed Causes Broken or disconnected harness Defective outdoor unit PCB Troubleshooting R20445 Caution Replace the harness Replace the outdoor unit PCB Check the compressor harness NO YES Is the harness broken Be sure to turn off the power switch before connecting or d...

Page 168: ...rom the power factor correction circuit Supposed Causes Defective reactor Reactor harness disconnection or wire breakage Defective outdoor unit PCB Troubleshooting YES NO Check the reactor harness Connect the harness properly Is the reactor harness connected properly R20211 NO YES Replace the outdoor unit PCB Replace the reactor Foreign object adhered to reactor Caution Be sure to turn off the pow...

Page 169: ...ircuit Error Decision Conditions When the compressor does not run for 15 seconds after receiving operation start command If the error repeats the system is shut down Reset condition Continuous run for about 11 minutes without any other error Supposed Causes Disconnection of the compressor relay cable Defective compressor Defective outdoor unit PCB Start up failure caused by the closed stop valve I...

Page 170: ...Check No 15 Check with the inverter analyser Turn off the power Disconnect the harnesses U V and W Turn on the power Check the electrolytic capacitor voltage Electrical components or compressor harnesses connected as specified Replace the outdoor unit PCB Replace the compressor Correct the power supply or replace the outdoor unit PCB Reconnect the electrical components or compressor harnesses as s...

Page 171: ...th the power on J3 error is judged if the discharge pipe temperature is lower than the heat exchanger temperature Supposed Causes Disconnection of the connector for the thermistor Thermistor corresponding to the error code is defective Defective heat exchanger thermistor in the case of J3 error outdoor heat exchanger thermistor in cooling operation or indoor heat exchanger thermistor in heating op...

Page 172: ...emperature is lower than the heat exchanger temperature Replace the thermistor Cooling Outdoor heat exchanger temperature Heating Indoor heat exchanger temperature Replace the indoor heat exchanger thermistor Replace the outdoor unit PCB Error displayed again on remote controller Indoor heat exchanger thermistor functioning Check No 01 Check the thermistor resistance value Check No 01 Check the in...

Page 173: ...or Disconnection of connector Defective outdoor unit PCB Troubleshooting Check No 17 Refer to P 188 Check No 19 Refer to P 189 A C B C C C 122 64 113 Caution WARNING To cool the electrical components the outdoor fan starts when the radiation fin temperature rises above C C and stops when it drops below B C R19556 YES NO YES NG NO OK NO YES Turn off the power and turn it on again Check the radiatio...

Page 174: ...re with the compressor on is above A C The error is cleared when the radiation fin temperature drops below B C If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Defective outdoor fan motor Short circuit Defective radiation fin thermistor Disconnection of connector Defective outdoor unit PCB Silicon grease is not...

Page 175: ...ting connectors or parts may be damaged R19529 NO NG OK NO YES Check the radiation fin temperature NO YES YES Above A C Check No 19 Check the outdoor fan Error displayed again Has the PCB been replaced Check if silicon grease is applied properly on the radiation fin If not apply the silicon grease Replace the outdoor unit PCB Replace the outdoor fan motor Correct the connectors and fan motor leads...

Page 176: ...mpressor is running A rotation speed error occurs while the compressor is running An output overcurrent signal is fed from the output overcurrent detection circuit to the microcomputer If the error repeats the system is shut down Reset condition Continuous run for about 11 minutes without any other error Supposed Causes Poor installation condition Closed stop valve Defective power module Wrong int...

Page 177: ...the system See if the same error occurs Check the power supply voltage Monitor the power supply voltage discharge and suction pressures and other factors for a long term Possible causes Momentary drop of power supply voltage Compressor overload Short circuit Check the installation condition Check with the inverter analyser Check the power module Keep on using Check the connectors and other compone...

Page 178: ...s commonly used for the outdoor fan motor humidifier fan motor and the four way valve coil R19688 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged YES NO YES YES YES Is the connector for the humidifier fan motor S72 connected Remove the humidifying fan assembly and rotate the fan by hand Check No 16 Check for the rotation pulse inpu...

Page 179: ...ected by humidifying thermistor Defective main relay Blown thermal fuse Defective heater control part Troubleshooting Check No 01 Refer to P 181 R19689 Caution YES YES YES Is the power supply voltage appropriate Turn off the power YES NO NO NO Is the heater resistance appropriate At normal temperature 97 Ω 10 Is the thermal fuse blown NO YES Check No 01 Is a resistance of the humidifying thermisto...

Page 180: ... abnormal Error Decision Conditions When the power is supplied and the thermistor input is 4 90 V and more or 0 06 V and less The outlet temperature of humidifying fan is more than 90 C Supposed Causes Short circuit and wire breakage of humidifying thermistor Disconnection of connector Heater has a high power Thermistor temperature detection error Defective rotor motor Defective hygroscopic fan mo...

Page 181: ...tance of humidifying thermistor within normal range Is the heater cooled well after the power turned off Include inside the humidifying hose and indoor air supply filter Caution R19690 At normal temperature 97 Ω 10 Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Replace the outdoor unit PCB Remove the foreign matter Refer to P9 troubleshoo...

Page 182: ...tion II The following conditions continue for 80 seconds Opening of the electronic expansion valve D Discharge pipe temperature E target discharge pipe temperature F Refrigerant shortage detection III When the difference of the temperature is smaller than G C it is regarded as refrigerant shortage If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes with...

Page 183: ... transistor harness for loosening Correct it as required Also replace the cracked pipe Check the pipes for improper contact and correct them as required Replace the cracked pipe Replace the electronic expansion valve Replace the defective thermistor s Completed Refrigerant shortage error again Oil oozing at internal piping Stop valve closed Compressor vibrating too much Oil oozing at relay pipe co...

Page 184: ...ltage detection The voltage detected by the DC voltage detection circuit is below 150 180 V depending on the model The compressor stops if the error occurs and restarts automatically after 3 minute standby Over voltage detection An over voltage signal is fed from the over voltage detection circuit to the microcomputer The compressor stops if the error occurs and restarts automatically after 3 minu...

Page 185: ...wer supply voltage Check the connection of the compressor harness Disturbance factors Noise Power supply distortion Precaution before turning on the power again Make sure the power has been off for at least 30 seconds Replace the indoor unit PCB A1P Turn on the power System restarted Repeat a few times Error again within 3 minutes after turning on the power Loose or disconnected NO YES NO Replace ...

Page 186: ...ions The data sent from the outdoor unit cannot be received without error or the disable status of signal transmission continues for 15 seconds Supposed Causes Wiring error Breaking of the connecting wires between the indoor unit and the outdoor unit Improper insulation of the connecting wires and earth Wiring length exceeds the specified range Defective outdoor unit PCB Defective indoor unit PCB ...

Page 187: ...y waveform Locate the cause of the disturbance of the power supply waveform and correct it Replace the indoor unit PCB A1P Does the outdoor fan rotate smoothly Replace the outdoor fan motor and the outdoor unit PCB Replace the outdoor unit PCB Wiring length is to be within the specified range Replace the connecting wires between the indoor unit and the outdoor unit Correct the connecting wires bet...

Page 188: ... work in order Indoor outdoor unit signal transmission cannot be performed for more than 15 seconds Supposed Causes Power supply voltage is not as specified Improper earth work Defective varistor or fuse on the outdoor unit PCB Defective thermal fuse on the terminal board of the outdoor unit Disconnection of connecting wires Defective outdoor unit PCB Noise Disturbed power supply waveform Wrong wi...

Page 189: ...mal fuse have continuity YES Go to the next page NO 5 V 0 5 V NO Check 5V and GND on the outdoor unit PCB Turn the power on again Start fan operation with the remote controller Is the power supply voltage fluctuation within 10 from the rated value Correct the power supply Replace the varistor Replace the fuse Reconnect the wire properly Replace the terminal board Replace the thermal fuse on the te...

Page 190: ...ly waveform From the previous page Locate the cause of the disturbance of the power supply waveform and correct it YES Does the outdoor fan rotate smoothly NO Rotate the outdoor fan by hand Replace the outdoor fan motor and outdoor unit PCB Reconnect the connecting wires YES Check the fuse on the indoor unit PCB A1P Does the fuse have continuity NO NO Does the indoor fan rotate smoothly YES Replac...

Page 191: ...g cannot be detected Error counter is reset when the data from the microcomputer for humidifying can be successfully received Supposed Causes Defective outdoor unit PCB Noise Troubleshooting R19732 Caution YES NO YES NO Turn off the power and turn it on again Check the varistor V3 V5 on the outdoor unit PCB Error again The cause can be an external factor other than the malfunction Observe the oper...

Page 192: ...rconnected Wrong wiring of connecting wires Wrong indoor unit PCB or outdoor unit PCB mounted Defective indoor unit PCB Defective outdoor unit PCB Troubleshooting R19506 Caution NO YES YES NO Match the compatible models Check the code numbers 2P012345 for example of the indoor and outdoor unit PCB with the Parts List If not matched change for the correct PCB OK Correct the connection Are the conne...

Page 193: ...minutes without any other error Supposed Causes Power supply voltage is not as specified Malfunction of DC voltage detection circuit Troubleshooting Correct the power supply Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged NO YES Check the power supply voltage Turn off the power Replace the outdoor unit PCB R20444 YES Disturbance fa...

Page 194: ...to check the preset hose length 1 Open the cover of the remote controller 2 Press the SET UP button for 5 seconds 3 Press the V or W button and select Hose length 4 Press the APPLY button pointing the transmitter of the remote controller at the indoor unit 5 The display shows the preset hose length Note When the hose length is not set Hose Unset is displayed Referring to Humidifying Hose Length Se...

Page 195: ...ay be damaged R19691 Before you check the LED A cancel the standby electricity saving function by starting fan operation with the remote controller Wait at least for 7 sec after turning on the power Is correct power supplied Is LED A turned off YES Blink OFF or Blink YES Does the LED A blink OFF or ON Is voltage of 5 V applied between 5V and GND Restart operation NO ON NO Turn on the power Turn on...

Page 196: ...on a PCB remove the PCB from the control PCB to measure the resistance When the connector of indoor heat exchanger thermistor is soldered on a PCB remove the thermistor and measure the resistance Thermistor temperature C Resistance kΩ 20 197 8 15 148 2 10 112 1 5 85 60 0 65 93 5 51 14 10 39 99 15 31 52 20 25 02 25 20 00 30 16 10 35 13 04 40 10 62 45 8 707 50 7 176 R25 C 20 kΩ B 3950 K kΩ 150 100 5...

Page 197: ...f connector 2 Check the input from the humidity sensor 1 3 Change the ambient conditions 2 and check that the input level changes accordingly 1 The voltage value may differ depending on the sensors 2 Change the humidity temperature airflow rate To do this merely breathe upon S200 R19733 8 7 6 5 4 3 2 1 Free pin Free pin Free pin Free pin Free pin Phase V Phase W Phase U S33 5V GND R19734 Room temp...

Page 198: ... to check the electronic expansion valve EV 1 Check if the EV connector is correctly connected to the PCB 2 Turn the power off and on again and check if the EV generates a latching sound 3 If the EV does not generate a latching sound in the above step 2 disconnect the connector and check the continuity using a multimeter 4 Check the continuity between the pins 1 6 2 6 3 6 4 6 If there is no contin...

Page 199: ...80 voltage at 120 220 VDC for 3 sec after compressor starts and then at about 12 15 VDC Fig 1 Disconnect the four way valve coil from the connector and check the continuity Fig 1 Voltage at S80 120 220 VDC 12 15 VDC Time Compressor ON 3 sec Caution on resetting the power supply Be sure to wait for 30 sec or more after turning off the power Four way valve coil Cooling Dry No continuity Heating Cont...

Page 200: ...ytic capacitor drops to 10 VDC or below before carrying out the service work Reference If the terminals of the compressor are not FASTON terminals difficult to remove the wire on the terminals it is possible to connect wires available on site to the outdoor unit from output side of PCB Do not connect them to the compressor at the same time otherwise it may result in incorrect detection Step 3 Acti...

Page 201: ...f OK in Check No 22 check if there is any solder cracking on the PCB 4 If any solder cracking is found replace the PCB or repair the soldered section If there is no solder cracking replace the PCB Caution 1 When the output frequency is low the LEDs blink slowly As the output frequency increases the LEDs blink quicker The LEDs look like they are lit 2 On completion of the inverter analyser diagnosi...

Page 202: ...15 VDC 4 Check that the rotation command voltage between the pins 2 4 S70 or the pins 3 5 S72 is 0 6 5 VDC 5 Keep operation off and power off Connect the connector S70 or S72 6 Check whether 4 pulses 0 15 V are output at the pins 1 4 S70 or the pins 2 5 S72 when the fan motor is rotated 1 turn by hand If NG in step 2 Defective PCB Replace the outdoor unit PCB If NG in step 4 Defective Hall IC Repl...

Page 203: ...y dirty Change the installation location or direction Change the installation location or direction Clean the outdoor heat exchanger Change the installation location or direction Check the outdoor temperature The outdoor temperature should be within the operation range R19385 YES YES YES NO NO NO NO YES Is the air filter or indoor outdoor heat exchanger dirty Is the connection pipe deformed Is the...

Page 204: ...e is or less than 1 kW short circuit occurs on the main circuit R19395 YES NO NO YES Outdoor fan system is functioning Check the outdoor fan system Reconnect the connector Outdoor fan running Fan motor lead wire connector disconnected Go to Check No 16 Negative terminal of multimeter positive terminal for digital multimeter 2 3 4 2 3 1 Positive terminal of multimeter negative terminal for digital ...

Page 205: ...ctor Follow the procedure below to measure resistance between the or terminal of the diode bridge and the U V or W terminal of the compressor with a multimeter Evaluate the measurement results referring to the following table Negative terminal of multimeter positive terminal for digital multimeter Diode bridge UVW Diode bridge UVW Positive terminal of multimeter negative terminal for digital multi...

Page 206: ...ps for Servicing 192 1 1 Pump Down Operation 192 1 2 Forced Cooling Operation 192 2 Trial Operation 193 3 Field Settings 194 3 1 SET UP Menu 194 3 2 Service Setting Menu 194 3 3 Humidifying Hose Length Setting 197 4 Silicon Grease on Power Transistor Diode Bridge 198 ...

Page 207: ...ration Indoor Unit Gas stop valve Close Liquid stop valve Valve cap Hexagonal wrench R19737 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 se...

Page 208: ...ial operation may be disabled in either operation mode depending on the room temperature After trial operation is complete set the temperature to a normal level 26 C 28 C in cooling 20 C 24 C in heating operation For protection the system does not start for 3 minutes after it is turned off 1 Open the cover of the remote controller 2 Press the SET UP button for 5 seconds 3 Press the T or S button a...

Page 209: ...operation will finish automatically in about 30 minutes No Menu items 1 INTELLIG EYE AIRFLOW 2 AUTO OFF time 3 BREEZE AIRFLOW 4 HUMIDIFY AIRFLOW 5 CONTINUE DRY 6 INSTALLED POSITION 7 RESET USED POWER 8 SOUND VOLUME 9 CONTRAST 10 24 HOUR FRESH AIR 11 RC ADDRESS 12 CHILD LOCK Page Menu Item 1 Checking error code 2 Test mode 3 Hose length 3M 3 1M 4M 4 1M 6M 6 1M 8M 8 1M 10M 4 Hose drying 5 RC demo 6 ...

Page 210: ...al The horizontal flaps are set facing a little higher If Circulate setting is set to OFF the angle of horizontal flaps in circulation airflow becomes same as in case of comfort airflow in cooling operation 9 Shutter setting It sets the air inlet shutter for on off If it is set to off there will be no bottom air intake 10 MOLD PROOF STREAMER It sets the streamer on off during MOLD PROOF operation ...

Page 211: ...d service setting menu to factory setting Note Note for replacing the indoor unit PCB When the indoor unit PCB is replaced all the settings are reset and have to be set on the remote controller again because the remote controller does not resend the recorded settings to the indoor unit However when only the remote controller is replaced you do not have to redo each setting because the indoor unit ...

Page 212: ...ail 1 Open the cover of the remote controller 2 Press the SET UP button for 5 seconds 3 Press the S or T button and select Hose length 4 Press the APPLY button 5 Press the S or T button and select hose length from 3M 3 1M 4M 4 1M 6M 6 1M 8M 8 1M 10M 6 Press the APPLY button pointing the transmitter of the remote controller at the indoor unit to set the hose length 7 To return to the normal mode pr...

Page 213: ...Detail 1 Wipe off the old silicon grease completely 2 Apply the silicon grease evenly See the illustrations below for examples of application 3 Tighten the screws of the power transistor diode bridge 4 Make sure that the heat radiation parts are firmly contacted to the radiation fin Note Smoke emission may be caused by bad heat radiation when the silicon grease is not appropriately applied OK Even...

Page 214: ...SiMT041311E 199 Appendix Part 8 Appendix 1 Piping Diagrams 200 1 1 Indoor Unit 200 1 2 Outdoor Unit 200 2 Wiring Diagrams 201 2 1 Indoor Unit 201 2 2 Outdoor Unit 201 ...

Page 215: ...D084172 OUTDOOR UNIT HEAT EXCHANGER 7 9 CuT 7 9 CuT 12 7 CuT DISTRIBUTOR 4 0 CuT 6 4 CuT 4 0 CuT 6 4 CuT STRAINER STRAINER FAN MOTOR M PROPELLER FAN 12 7 CuT 12 7 CuT 6 4 CuT 12 7 CuT 7 9 CuT 6 4 CuT 7 9 CuT COMPRESSOR 12 7 CuT 9 5 CuT ACCUMULATOR MUFFLER MUFFLER REFRIGERANT FLOW COOLING HEATING HEAT EXCH THERMISTOR DE FOUR WAY VALVE ON HEATING DISCHARGE PIPE THERMISTOR DO MUFFLER WITH FILTER MOTO...

Page 216: ... C105 FG1 F1U F1UT H1P H2P H4P H5P S1C S2C M1F M1S M8S MR10 R1T R3T R1V S16 S401 CN403 S1W X1M U 3D081990A FIELD WIRING L2R L1R INDOOR 1 YLW Z4C N 3 S45 102 C YLW 3 MRM20 t RED PPL BRN WHT IPM1 DB1 HL1 Z1C N 6 BLK L 1 1 HN1 HR2 HR1 MRM10 V5 WHT 2 2 N S RED HR4 HR3 3 3 GRY E1 V3 X1M L Z2C N 3 PCB1 N MR30 SA1 E2 GRN IPM2 DB3 X1A MRK HK3 RED RED HK2 WHT WHT M 1 HK1 BLK BLK M3F MR4 1 ORG ORG S1T S101 ...

Page 217: ...Revision History Month Year Version Revised contents 03 2014 SiMT041311E First edition ...

Page 218: ...supplied or specified by Daikin Ask a qualified installer or contractor to install those parts and accessories Use of unauthorised parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage electrical shock fire or explosion z Read the User s Manual carefully before using this product The User s Manual provides important safety instructions a...

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