Daikin SiBE04-624_B_FTXR-E Service Manual Download

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Inverter Pair

Wall Mounted Type E-Series

[Applied Models]

Inverter Pair : Heat Pump

SiBE04-624_B

Summary of Contents for SiBE04-624_B_FTXR-E

Page 1: ...Inverter Pair Wall Mounted Type E Series Applied Models z Inverter Pair Heat Pump SiBE04 624_B ...

Page 2: ... E Series zHeat Pump Indoor Unit FTXR28EV1B9 FTXR42EV1B9 FTXR50EV1B9 Outdoor Unit RXR28EV1B9 RXR28EV1B8 RXR42EV1B9 RXR42EV1B8 RXR50EV1B9 RXR50EV1B8 The removal procedure for each model is separately bound Refer to page 155 for the booklet number of applicable model ...

Page 3: ...STURIZING Operation 33 1 10 FLASH STREAMER AIR PURIFYING Operation 34 1 11 FRESH AIR SUPPLY VENTILATION Operation 36 1 12 HOME LEAVE VENTILATION 37 1 13 TIMER Operation 38 1 14 NIGHT SET Mode 39 1 15 COMFORT SLEEP Operation 40 1 16 POWERFUL Operation 42 1 17 MOLD PROOF Operation 43 1 18 MOLD SHOCK OUT Operation 45 1 19 INFORMATION DISPLAY 48 1 20 Multi colored Indicator Lamp 49 1 21 Monitor Bright...

Page 4: ... 11 Streamer Unit Abnormality 91 2 12 Thermistor or Related Abnormality Indoor Unit 93 2 13 Front Panel Open Close Abnormality 94 2 14 Humidity Sensor Abnormality 95 2 15 Refrigerant Shortage 96 2 16 Low voltage Detection or Over voltage Detection 98 2 17 Signal Transmission Error between Indoor Unit and Outdoor Unit 100 2 18 Outdoor Unit PCB Abnormality or Communication Circuit Abnormality 101 2 ...

Page 5: ...rter Analyzer Check 138 3 9 Rotating Pulse Check on Outdoor Unit PCB 140 3 10 Installation Condition Check 141 3 11 Discharge Pressure Check 141 3 12 Outdoor Fan System Check 142 3 13 Main Circuit Short Check 142 3 14 Power Module Check 143 3 15 Dehumidifying Solenoid Valve Check 144 Part 7 Trial Operation and Field Settings 145 1 Pump Down Operation 146 2 Forced Cooling Operation 147 3 Trial Oper...

Page 6: ...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 inspecting the circuits do not touch any electrically charged sections of the equipment If the refrigerant gas is discharged during the repair wor...

Page 7: ...ectrical shock Do not clean the air conditioner by splashing water Washing the unit with water may cause an electrical shock Be sure to provide the grounding when repairing the equipment in a humid or wet place to avoid electrical shocks Be sure to turn off the power switch and unplug the power cable when cleaning the equipment The internal fan rotates at a high speed and may cause injury Be sure ...

Page 8: ...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 the terminal connection section may cause an electrical shock excessive heat generation or fire Do not damage or modify the power cable Damaged or modified power cable may cause an electrical shock or fire...

Page 9: ...event 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 conditions of the installation site to prevent electrical shocks Do not install the equipment in a place where there is a possibility of combustible gas leaks If the combustible gas leaks and remains around the...

Page 10: ...re to install the packing and seal on the installation frame properly If the packing and seal are not installed properly water may enter the room and wet the furniture and floor For unitary type only Caution Icon Type of Information Description Note Note A note provides information that is not indispensable but may nevertheless be valuable to the reader such as tips and tricks Caution Caution A ca...

Page 11: ...SiBE04 624_B List of Functions 1 Part 1 List of Functions 1 Functions 2 ...

Page 12: ...ATION z NIGHT QUIET mode automatic Timer 24 hour ON OFF TIMER z OUTDOOR UNIT QUIET operation manual COUNTDOWN OFF TIMER z INTELLIGENT EYE operation NIGHT SET mode z Quick warming function Preheating Operation z Worry Free Reliability Durability Quiet control z Auto restart after power failure z Hot start function z Self diagnosis digital LED display z Automatic defrosting z Wiring error check func...

Page 13: ...z NIGHT QUIET mode automatic Timer 24 hour ON OFF TIMER z OUTDOOR UNIT QUIET operation manual COUNTDOWN OFF TIMER z INTELLIGENT EYE operation NIGHT SET mode z Quick warming function Preheating Operation z Worry Free Reliability Durability Quiet control z Auto restart after power failure z Hot start function z Self diagnosis digital LED display z Automatic defrosting z Wiring error check function O...

Page 14: ...SiBE04 624_B 4 Specifications Part 2 Specifications 1 Specifications 5 ...

Page 15: ...ight Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 15 0 14 0 13 0 15 0 14 0 13 0 17 0 16 0 15 0 17 0 16 0 15 Power Consumption Rated W 30 30 30 30 30 30 35 35 35 35 35 35 Power Factor 90 9 93 2 96 2 90 9 93 2 96 2 93 6 95 1 97 2 93 6 95 1 97 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H...

Page 16: ...ownward Air Filter Removable Washable Mildew Proof Running Current Rated A 0 20 0 19 0 18 0 20 0 19 0 18 Power Consumption Rated W 40 40 40 40 40 40 Power Factor 90 9 91 5 92 6 90 9 91 5 92 6 Temperature Control Microcomputer Control Dimensions H W D mm 305 890 209 Packaged Dimensions H W D mm 280 956 378 Weight Mass kg 14 Gross Weight Gross Mass kg 18 Sound Pressure Level H M L SL dB A 44 37 29 2...

Page 17: ...wnward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 15 0 14 0 13 0 15 0 14 0 13 0 17 0 16 0 15 0 17 0 16 0 15 Power Consumption Rated W 30 30 30 30 30 30 35 35 35 35 35 35 Power Factor 90 9 93 2 96 2 90 9 93 2 96 2 93 6 95 1 97 2 93 6 95 1 97 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 305 890 209 305...

Page 18: ... Air Filter Removable Washable Mildew Proof Running Current Rated A 0 20 0 19 0 18 0 20 0 19 0 18 Power Consumption Rated W 40 40 40 40 40 40 Power Factor 90 9 91 5 92 6 90 9 91 5 92 6 Temperature Control Microcomputer Control Dimensions H W D mm 305 890 209 Packaged Dimensions H W D mm 280 956 378 Weight Mass kg 14 Gross Weight Gross Mass kg 18 Sound Pressure Level H M L SL dB A 44 37 29 26 44 38...

Page 19: ...SiBE04 624_B Printed Circuit Board Connector Wiring Diagram 9 Part 3 Printed Circuit Board Connector Wiring Diagram 1 Indoor Unit 10 2 Outdoor Unit 13 ...

Page 20: ...l 5 S43 Connector for dehumidifying solenoid valve coils 6 S46 Connector for display PCB 7 S48 Connector for humidity sensor PCB 8 S51 Connector for reduction motor limit switch front panel 9 S52 Connector for streamer unit PCB 10 H1 H2 H3 Connector for terminal board indoor outdoor transmission 11 FG Connector for terminal board frame ground 12 FU1 F1U Fuse 3 15 A 250 V 13 LED A LED for service m...

Page 21: ...A3P Signal Receiver Transmitter PCB 1 S56 Connector for control PCB 2 S57 Connector for signal receiver transmitter PCB 3 S63 H1P Connector for LED PCB multi monitor 4 JA Address setting jumper Refer to page 150 for detail 5 SW1 S1W Forced cooling operation ON OFF button Refer to page 147 for detail 6 LED2 H2P LED for timer yellow 7 LED3 H3P LED for moisture operation green JA S56 SW1 LED2 LED3 S5...

Page 22: ... Humidity Sensor PCB A5P Streamer Unit PCB 1 CN1 Connector for control PCB 2 R2T Room temperature thermistor R2T CN1 3P163282 1 Humidity sensor 1 S401 Connector for control PCB 2 S402 Connector for limit switch for streamer 3 S403 Connector for streamer S403 S401 S402 3P163349 1 ...

Page 23: ...for thermistors outdoor temperature outdoor heat exchanger discharge pipe 9 S91 Connector for humidifying thermistor 10 S501 Connector for limit switch 11 HR1 HR2 Connector for reactor 12 HK1 HK2 HK3 Connector for hygroscopic fan motor 13 HH1 HH2 Connector for humidifying heater 14 HL1 HN1 S Connector for terminal board 15 E1 E2 Connector for earth wire 16 U V W Connector for compressor 17 OL1 OL2...

Page 24: ...1 16 POWERFUL Operation 42 1 17 MOLD PROOF Operation 43 1 18 MOLD SHOCK OUT Operation 45 1 19 INFORMATION DISPLAY 48 1 20 Multi colored Indicator Lamp 49 1 21 Monitor Brightness Setting 49 1 22 Child Proof Lock Setting 49 1 23 Clock Setting 50 1 24 Filter Cleaning Indicator 50 1 25 Other Functions 51 1 26 Table for Special Modes 52 2 Control Specification 54 2 1 Frequency Control 54 2 2 Controls a...

Page 25: ...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 i...

Page 26: ...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 147 for detail Refrigerant circulation rate high high f low f freq variable Refrigerant circulation rate low high speed low speed R2812 Amount of heat ...

Page 27: ...ng and fan 1 3 4 3 D Airflow Alternative repetition of vertical and horizontal swing motions enables uniform air conditioning of the entire room This function is effective for starting the air conditioner When the horizontal swing and vertical swing are both set to automatic operation the airflow becomes 3 D airflow The horizontal and vertical swing motions are alternated and the airflow direction...

Page 28: ...s move according to the settings of the remote controller The vertical swing flap is controlled not to blow the air directly on the person in the room The indication changes every time is pressed Indication disappears R13852 COMFORT AIRFLOW Operation Displays COMFORT AIRFLOW operation Displays COOLING BREEZE operation COOLING SARARA DRYING DRY COOLING MOISTURE COOLING HEATING HUMID HEATING MOISTUR...

Page 29: ...ort is maintained Left and right flaps move according to the setting of the remote controller Airflow rate Airflow rate is controlled automatically Features 1 f fluctuation rhythm switches airflow direction By fluctuating airflow direction you can feel cool even the room temperature is set rather high By 1 f fluctuation rhythm upper and lower flaps move up and down unlike the conventional up and d...

Page 30: ...according to the indoor heat exchanger temperature and the difference between the room thermistor temperature and the target temperature Note 1 During POWERFUL operation fan rotates at H tap 80 rpm 2 The fan stops during defrost operation 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 tha...

Page 31: ...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 Dry 10 minutes Heating 10 seconds Cooling Heating Refer to Temperature Control on page 15 for detail B A OFF ON C Room thermistor temperature target tempera...

Page 32: ...ting 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 HUMID HEATING by URURU SARARA This air conditioner enables uniformly humidifying the room by circulating moisture with warm air HUMID HEATING operation R13858 URURU HUMIDIFYING operation taking in outdoor moisture fully humidifying ...

Page 33: ...orage of musical instruments Conditions for Humidifying Operation During heating operation humidifying operation is available when the following conditions 1 5 are met at the same time 1 Indoor heat exchanger temperature is 12 C or more 2 Outdoor temperature is from 10 C to 24 C in trial operation up to 34 C is possible Humidifying operation does not work under 10 C 3 Approx 1 minute has already p...

Page 34: ...itions 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 ...

Page 35: ...automatically stops after about 30 minutes Note In a room that is spacious such as loft style or partitioned by an accordion style curtain the ventilation volume is large and sometimes may not reach the set humidity a Humidifying time Approx 70 min According to the outdoor temperature and the hose length set by remote controller b Drying time Approx 2 10 min According to the hose length set by rem...

Page 36: ...ss 50 class 0 0 2 4 6 8 10 100 200 300 400 500 600 Humidifying Capacity ml h Humidifying hose length 7 5 m 87 RH 80 RH 70 RH 60 RH 50 RH 40 RH 30 RH 20 RH R13863 Outdoor temperature ºC rated 400 ml h Indoor 20ºCDB Outdoor 7ºCDB 6ºCWB Outdoor relative humidity 0 0 2 4 6 8 10 100 200 300 400 500 600 Humidifying Capacity ml h Humidifying hose length 7 5 m 87 RH 80 RH 70 RH 60 RH 50 RH 40 RH 30 RH 20 ...

Page 37: ...rflow rate H tap Room volume 70 m3 Ventilation rate 0 5 times hour Humidifying hose length 7 5 m 100 80 60 40 20 0 10 0 10 20 20 40 60 Outdoor humidity Outdoor temperature C R13867 Condition Set temperature 20 C Airflow rate H tap Room volume 100 m3 Ventilation rate 0 5 times hour Humidifying hose length 7 5 m 100 80 60 40 20 0 10 Condition Set temperature 20 C Airflow rate H tap Room volume 120 m...

Page 38: ... the discharged air by ventilation rate 16 m2 hose length 4 m 28 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 Humidifying capacity ratio 7 5 m as 100 R13869 Outdoor temp 7 CDB 6 CWB 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 ...

Page 39: ...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 40: ... indoor humidity as you like By decreasing the temperature gap between indoor and outdoor you can avoid a heat shock This feature is recommended for ladies or elders who are sensitive to cooling for families with a baby as well as for energy saving R13875 DRY COOLING operation SARARA DRYING operation mixed together Optimal comfortable air R13876 Indoor heat exchanger as condenser warmed Indoor hea...

Page 41: ...creases the drop in room temperature is suppressed Operation frequency of the compressor When the operation frequency increases the room temperature drops and when the operation frequency decreases the drop in room temperature is suppressed Thermostat OFF condition Room temperature set temperature 2 5 C or Room temperature set temperature and the humidity is lower than the target humidity lower by...

Page 42: ...ure 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 point is the same as the ...

Page 43: ...tment nor prevention of skin roughness Details of operation MOISTURIZING operation R13878 Time MOISTURE COOLING 65 DRY COOLING 50 60 Room humidity Rotation speed of indoor unit fan Humidity in MOISTURE COOLING operation Raise humidity to 65 Humidity R18351 MOISTURE COOLING operation keeps the humidity at 65 Unlike ordinary DRY COOLING it prevents the room from drying Time MOISTURE HEATING 60 HUMID...

Page 44: ... STREAMER Air Purifying The streamer unit discharges high energy electrons and powerfully decomposes odor bacteria and hazardous chemical materials at an oxidative distraction speed 1000 times higher than the general glow discharge FLASH STREAMER AIR PURIFYING operation FLASH STREAMER AIR PURIFYING OFF R18353 FLASH STREAMER AIR PURIFYING FRESH AIR SUPPLY VENTILATION FLASH STREAMER AIR PURIFYING St...

Page 45: ...he initial concentration setting of 0 3 ppm Observed by Daikin using 28 class model Nozaki laboratory Graduate Course of Health and Society System Tohoku Bunka Gakuen University R13882 Indoor formaldehyde concentration ppm Operation time min Guideline released by the Ministry of Health Labor and Welfare in Japan 0 08 ppm Decomposing speed is 3 5 times faster than that of the natural ventilation 0 ...

Page 46: ...upply filter removes about 97 of pollen and dust 3 Controlling temperature The fresh air passing through the air supply filter is cooled or heated in the indoor unit and supplied into the room You can keep comfortable temperature and also replace air because the ventilation is performed while temperature is controlled Pollen exhaust gas and odor that could not be removed by the thermal catalyst or...

Page 47: ...n be set from 1 to 9 hours Factory set 4 hours Note 1 Outdoor sound may be heard or the air may have a smell as the air is taken from outdoors Compared with the other operations operating sound is rather high 2 Depending on the outdoor temperature and humidity operating sound sometimes changes Quiet because the ventilation fan is located in the outdoor unit Energy saving system due to low heat los...

Page 48: ...r temperature before preset time and operation starts automatically about 1 hour before so that the room temperature becomes optimum at the preset time 1 13 2 COUNTDOWN OFF TIMER Operation Features The COUNTDOWN OFF timer can be set by simple button pressing The operation is stopped when the set time comes The timer can be set in the unit of 0 5 hour for maximum 9 5 hours It can be used in combina...

Page 49: ...then automatically raises the target temperature slightly in the case of cooling or lowers it slightly in the case of heating This prevents excessive cooling in summer and excessive heating in winter to ensure comfortable sleeping conditions and also conserves electricity Cooling Heating R18034 TIMER operation NIGHT SET Mode ON Target temperature 0 5 C temperature shift Operation stops at the set ...

Page 50: ...wake up time approaches the room temperature is gradually raised to induce the raising of body temperature before waking V shape pattern temperature control system The air conditioner controls the room temperature showing V shape pattern Change in body temperature in human sleep is controlled in ideal V shape pattern by air conditioner s temperature control Reference Control system adopted for JAL...

Page 51: ...ered gradually by taking time of as long as 3 hours Morning operation which raises the preset temperature gradually ON Approx 3 hours Approx 1hour Initial setting OFF 0 5 C 0 5 C 1 C 0 5 C 0 5 C 0 5 C 0 5 C R13890 Room temperature setting 37 36 8 36 6 36 4 36 2 35 8 36 0 60 120 180 240 300 360 420 Time min 27 0 28 0 29 0 30 0 31 0 Depth of sleep 1 2 3 4 R5092 Fixed temperature control Environment ...

Page 52: ...EATING operation HEATING HUMID HEATING MOISTURE HEATING Features 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 POWERFUL operation R5971 Cannot be used while the unit is not running...

Page 53: ...once every 2 weeks Manual operation Features Time chart Operation runs about for 3 hours while changing colors of the multi colored indicator lamp MOLD PROOF operation Hold down for 2 seconds R13892 Indoor fan Horizontal flap Compressor Damper Moisture discharge fan Start Complete Cooling Stop 3 hours R13893 ON OFF Fully opened Exhaust side Heating Min OFF Minimum open Fully closed LLL tap OFF Pre...

Page 54: ...ide the air conditioner During operation smells may occur This function sometimes does not begin when outdoor temperature or indoor humidity is extremely high Depending on the temperature conditions moisture exhaustion function is not carried out 1 Drained water discharge Drained water in the drain pan is discharged 2 Inside drying operation After the drained water discharged the moisture which ar...

Page 55: ...tor lamp Reheating dehumidifying which dehumidifies continuously R13895 MOLD SHOCK OUT Operation Hold down for 2 seconds R13897 The test was conducted at DAIKIN s laboratory with use of the mold sensor of Environmental Biological Research Institute Before MOLD SHOCK OUT operation Without MOLD SHOCK OUT operation With MOLD SHOCK OUT operation Fewer molds grow as compared with the case of without MO...

Page 56: ...mold COOLING stop Time Time R18355 Mold grows according to the humidity The humidity in the room returns to original level when COOLING operation stops COOLING start The humidity in the room is lowered suddenly Humidity MOLD SHOCK OUT operation after COOLING Growth of mold Time Time R18356 Growing of mold is suppressed MOLD SHOCK OUT operation COOLING start ...

Page 57: ... 20 13 40 14 00 14 20 Humidity Room temperature MOLD SHOCK OUT operation 27 C 75 85 reheating dehumidifying 3 C Humidity indoor With MOLD SHOCK OUT operation R18146 Growth of mold can be prevented by lowering the humidity to half and continuing the operation for 3 hours Time Before MOLD SHOCK OUT operation Without MOLD SHOCK OUT operation Outdoor temperature Humidity without MOLD SHOCK OUT operati...

Page 58: ...ut from the outdoor unit and the temperature of the outdoor heat exchanger Lowest displayable outdoor temperature is 9 C Even if the outdoor temperature is lower than this 9 is displayed Highest displayable outdoor temperature is 39 C Even if the outdoor temperature is higher than this 39 is displayed Displayed temperature and humidity are those near the sensor Displayed temperature or humidity ma...

Page 59: ...st 2 seconds during operation of the air conditioner MOLD PROOF purple blue blue light blue light blue white white MOLD SHOCK OUT blue light blue white 1 21 Monitor Brightness Setting The brightness of the multi colored indicator lamp can be adjusted HIGH LOW or OFF It is convenient when it is excessively bright while asleep Refer to SET UP on page 70 for adjustment 1 22 Child Proof Lock Setting T...

Page 60: ...leted 1 24 Filter Cleaning Indicator When the unit is operated for about 2 weeks about 340 hours the filter cleaning indicator appears to inform you that the time of maintenance comes If the filter is left dirty the power consumption increases by about 10 It is recommended to clean the filter it periodically for energy saving How to reset the filter cleaning indicator SELECT button CLOCK button R1...

Page 61: ...ation mode refers to the following table Forced cooling operation Forced cooling operation can be started by pressing the ON OFF button for 5 to 9 seconds while the unit is not operating Refer to page 147 for detail Note When the ON OFF button is pressed for 10 seconds or more the forced cooling operation is stopped 1 25 4 Titanium Apatite Photocatalytic Air Purifying Filter This filter combines t...

Page 62: ...9 sec CANCEL 5 sec A Forced cooling operation mode B Diagnosis mode Operation OFF Left for 15 min CANCEL 5 sec Left for 60 sec Left for 60 sec Mode selection view Select with SELECT or button CLOCK 5 sec Trial operation mode CLOCK Trial operation Operation OFF Left for 30 min CLOCK Hose length setting CLOCK 5 sec Left for 60 sec Drying mode CLOCK CLOCK 5 sec Left for 30 min CLOCK CLOCK 5 sec Left ...

Page 63: ... or check the preset value Refer to the installation manual 3 Drying mode Hose Dry operation is a forced drying operation for humidifying hose The operation continues for approx 30 minutes Cooling heating or dry operation is not available during Hose Dry operation 4 Humidifying airflow rate setting mode Humidifying airflow rate setting mode allows to fine tune the speed of the humidifying fan arou...

Page 64: ...is set as an upper limit frequency among the frequency upper limits of the following functions Compressor protection input current discharge pipe temperature heating peak cut freeze up protection defrost 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 draft preve...

Page 65: ...uency does not change for more than a certain fixed time the frequency is adjusted according to the D value When the D value is small the frequency is lowered When the D value is large the frequency is increased 3 Frequency management when other controls are functioning When frequency is dropping Frequency management is carried out only when the frequency drops For limiting lower limit Frequency m...

Page 66: ...onds 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 differential pressure to activate the four way valve is acquired by having output frequency which is more than a certain fixed frequency for a certain fixed time Detail Starting Conditions 1 When the compressor starts and the four way valve...

Page 67: ...mpressor 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 The upper limit of frequencies G and H are the same Cooling Heating A Hz 52 48 B Hz 54 58 C Hz 78 80 D Hz 98 98 E seconds 220 220 F seconds 140 140 G seconds 60 60 H seconds 60 60 sec Time R13906 Hz Frequency C D B E F G H A ...

Page 68: ...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 canceled 108 correction value a 118 correction value a 103 correction value a 97 correction value a 85 ...

Page 69: ...ping zone The upper limit of the compressor frequency is defined as operation frequency 2 Hz After this the output frequency is pulled down 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 canceled Limitation of current dropping and stop value according to the outdoor temperature The current drops when outdoor ...

Page 70: ...erature 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 canceled 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 W...

Page 71: ...the air and as a consequence the relative humidity of the air rises When the relative humidity of the outlet air nears 100 water may be blown out To prevent this from happening the unit changes its target evaporating temperature and the frequency of the compressor under certain circumstances Normally speaking even under these conditions dew prevention safety active the room should still be cooled ...

Page 72: ...0 C 6 Fan control during heating operation The rotation speed of the outdoor fan is fixed 2 10 Liquid Compression Protection Function Outline In order to obtain the dependability of the compressor the compressor is stopped according to the outdoor temperature and the outdoor heat exchanger temperature Detail Outdoor temperature and outdoor heat exchanger temperature Cooling or dry operation Compre...

Page 73: ...erature and the outdoor heat exchanger temperature The system is in heating operation The compressor operates for 6 minutes More than 25 minutes of accumulated time pass after the start of the operation or ending the previous defrosting Conditions for Canceling Defrost The judgment is made with outdoor heat exchanger temperature 6 22 C Frequency Compressor Four way valve Fan ON OFF ON OFF ON OFF 0...

Page 74: ...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 z Holding Functions No Functions Operation pattern Main control Secondary control Control when the frequency changes High discharge pipe temperature co...

Page 75: ...egree during defrosting 2 12 4 Starting Operation Control The electronic expansion valve opening is controlled when the operation starts and prevents superheating or liquid compression 2 12 5 Control when the Frequency Changes When the target discharge pipe temperature control is active if the target frequency is changed to a specified value in a certain time period the target discharge pipe tempe...

Page 76: ...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 Adjustment when the thermistor is disconnected When the disconnection is ascertained the compressor continues operation for 9 minutes and then stops When the compressor stops ...

Page 77: ...SiBE04 624_B Remote Controller 67 Part 5 Remote Controller 1 FTXR28 42 50EV1B9 68 ...

Page 78: ...ch section is shown with all its displays on for the purpose of explanation INFORMATION 1 button Displays the indoor temperature and humidity and the outdoor temperature COUNTDOWN OFF TIMER 2 button Sets the time to stop Direct operation buttons AUTO 4 button URURU HUMIDIFYING 5 button HEATING button SARARA DRYING 6 button COOLING button FLASH STREAMER AIR PURIFYING 8 FRESH AIR SUPPLY VENTILATION ...

Page 79: ... unit operation and remote controller display according to your preference MOISTURIZING 17 button Keeps humidity high to moisturize your skin HOME LEAVE VENTILATION 18 button Ventilates the room during home leaving MOLD SHOCK OUT 19 button Continuously runs the dehumidifying operation to keep the room air dry and clean MOLD PROOF 20 button Dries the inside of the unit to prevent mold and odor grow...

Page 80: ...GH STD LOW CONT HIGH STD LOW CONT DRY COOLING SARARA DRYING 18 C 30 C Operating mode SARARA DRYING DRY COOLING MOISTURIZING AUTO COOLING HEATING HUMID HEATING URURU HUMIDIFYING Airflow rate setting COMFORT AIRFLOW COOLING BREEZE FLASH STREAMER AIR PURIFYING FRESH AIR SUPPLY VENTILATION z Available Not available z z z z z z z z z z Item Description MONITOR BRIGHTNESS BEEP volume CONTRAST Setting Se...

Page 81: ...tion or Over voltage Detection 98 2 17 Signal Transmission Error between Indoor Unit and Outdoor Unit 100 2 18 Outdoor Unit PCB Abnormality or Communication Circuit Abnormality 101 2 19 Signal Transmission Error on Outdoor Unit PCB 104 2 20 Unspecified Voltage between Indoor Unit and Outdoor Unit 105 2 21 Incomplete Setting for Hose Length 106 2 22 Outdoor Unit PCB Abnormality 107 2 23 OL Activati...

Page 82: ... Supply Waveforms Check 135 3 5 Electronic Expansion Valve Check 136 3 6 Four Way Valve Performance Check 137 3 7 Inverter Units Refrigerant System Check 138 3 8 Inverter Analyzer Check 138 3 9 Rotating Pulse Check on Outdoor Unit PCB 140 3 10 Installation Condition Check 141 3 11 Discharge Pressure Check 141 3 12 Outdoor Fan System Check 142 3 13 Main Circuit Short Check 142 3 14 Power Module Che...

Page 83: ...e green LED LED A on the control PCB When the microcomputer works in order the LED A blinks Remote Controller With the wireless remote controller error codes can be confirmed 1 Hold the timer cancel button down for 5 seconds with the remote controller set toward the indoor unit 2 The display on the remote controller shows an error code with a long beep Note To cancel the indication of error code h...

Page 84: ...rmality 113 F3 Discharge pipe temperature control 115 F6 High pressure control in cooling 116 H0 Compressor system sensor abnormality 117 H1 Humidifying unit Damper abnormality 118 H6 Outdoor Position sensor abnormality 119 H8 DC voltage current sensor abnormality 121 H9 Outdoor temperature thermistor or related abnormality 122 J3 Discharge pipe thermistor or related abnormality 122 J6 Outdoor hea...

Page 85: ...is OFF Improper power supply voltage Improper connection of wire Incorrect combination of indoor unit and outdoor unit Battery shortage of remote controller Invalid address setting Protection device works dirty air filter refrigerant shortage overfilling mixed air etc Transmission error between indoor unit and outdoor unit Defective outdoor unit PCB ...

Page 86: ...utdoor unit YES Power failure Is the supply voltage appropriate Make sure that the infrared ray is radiated from remote controller infrared ray checker Continued to the next page 1 R18114 Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Insert the power supply plug into the outlet Turn on the breaker for the power supply Wait until the powe...

Page 87: ...displayed on the remote controller Diagnose by the error code 1 Continued from the previous page Is there a sound indicating that a signal from the remote controller is received YES YES NO NO YES Are the batteries in the remote controller flat Replace the batteries NO Does the address of the remote controller match with that of the indoor unit Match the address ...

Page 88: ...but does not cool heat the room Error Code Error Decision Conditions Supposed Causes Improper setting for temperature Incorrect combination of indoor unit and outdoor unit Clogged air filter Insufficient power Refrigerant piping is too long Defective field piping squeezed etc ...

Page 89: ...ation space Is the indoor unit compatible with the outdoor unit NO NO NO NO NO YES YES YES YES YES Appropriate NO Is the air filter clogged YES Is the load i e size of the room appropriate for the capacity Is the refrigerant piping too long Too long Check No 01 Is the room temperature thermistor or the outdoor temperature thermistor in good working order Be sure to turn off the power switch before...

Page 90: ...Error Decision Conditions Supposed Causes Insufficient capacity of safety breaker Earth leakage breaker is too sensitive Not exclusive circuit The supply voltage is not within rated voltage 10 The size of connecting wire is thin Air is mixed Overfilling of refrigerant Defective outdoor unit PCB short circuit ...

Page 91: ... the connecting wire as specified OK OK Check No 20 Short circuit check YES Check No 20 Short circuit check Power supply Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Replace the safety breaker to a specified one Increase the set value of the earth leakage current on the breaker or replace the breaker Use the exclusive circuit Replace th...

Page 92: ...piping secured and fixed NO YES YES YES YES NO NO YES NO Unit Installation NO NO Does the fan contact with other parts Does the piping contact with the casing YES Can a passing sound be heard from the pressure reducing valve Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Modify installation conditions reinforce the wall install outdoor ru...

Page 93: ... enough Error Code Error Decision Conditions Supposed Causes Hose length is not set Improper setting for hose length Air is short circuited at outdoor unit Clogged air supply filter Insufficient heat insulation of duct Indoor ventilation is made too often Ceiling is very high ...

Page 94: ... ceiling YES screens consecutives room NO NO highly packed house or apartments NO YES YES NO NO Is the set temperature too high Is the outdoor temperature or humidity extremely low R18119 Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Correct the hose length within the specified length Explain it to the user Reset the hose length with the...

Page 95: ...amaged R18137 Is correct power supplied Does the LED A turn off Does the LED 5 turn off YES YES YES YES YES YES YES Does the LED A blink Does the LED 5 blink NO Is voltage of 5 V applied between 5V and GND Restart operation Restart operation NO NO NO NO NO NO Is voltage of 5 V applied between 5V and GND Turn on the power supply Turn on the breaker Do not work on or touch components other than spec...

Page 96: ...heck 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 R18325 Caution To secure the connection once disconnect the connector and then reconnect it YES NO YES NO YES NO YES Match the compatible...

Page 97: ...etected 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 65 C Supposed Causes Short circuited air Clogge...

Page 98: ...ace the indoor unit PCB Replace the thermistor As described in the thermistor characteristic chart Check the air filter Check the dust accumulation on the indoor heat exchanger Is there any short circuit Dirty Dirty Check the air passage Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Replace the indoor heat exchanger Replacement of the so...

Page 99: ...ed to determine abnormal fan motor operation Error Decision Conditions The detected rotation speed does not reach the demanded rotation speed of the target tap and is less than 50 of the maximum fan motor rotation speed Supposed Causes Layer short inside the fan motor winding Breaking of wire inside the fan motor Breaking of the fan motor lead wires Defective capacitor of the fan motor Defective i...

Page 100: ...e fan rotate smoothly Does the fan rotate Is the motor power supply voltage 310 340 VDC generated Is the motor control voltage 15 VDC generated Turn off the power supply and rotate the fan by hand Turn the power on and start operation Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Check No 02 Check the output of the fan motor connector R1...

Page 101: ...ditions If the error repeats in air purifying operation the system is shut down Reset condition Continuous run for about 2 minutes without any other error Supposed Causes Short circuit caused by dust or drip of water on the electrode unit of the streamer unit Scratch or crack in the harness for the streamer unit Defective streamer unit PCB ...

Page 102: ... connection Replace the limit switch Replace the harness Replace the streamer unit PCB R18121 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Dust or drip of water is on the streamer unit YES NO NO YES Does the multi colored indicator lamp blink about 1 minute after air purifying operation starts NO YES Is the streamer unit install...

Page 103: ...connection of connector Defective thermistor Defective indoor unit PCB humidity sensor PCB control PCB Troubleshooting Check No 01 Refer to P 134 C4 Indoor heat exchanger thermistor C9 Room temperature thermistor YES R18122 NO Check No 01 Check the thermistor resistance value YES NO Caution Correct the connection Replace the thermistor Replace the humidity sensor PCB Replace the indoor unit PCB No...

Page 104: ...alization finishes 4 Operate the unit with the indoor unit ON OFF button YES YES YES YES NO NO NO NO Replace the assembly of the front panel mechanism Replace the assembly of the front panel mechanism Check the movement of the right and left separately by hand Replace the harness and reduction motor The cause may be an external factor such as deformation of the panel or stuffed dust Find out the c...

Page 105: ...Defective indoor unit PCB humidity sensor PCB control PCB Defective humidity sensor Troubleshooting Check No 07 Refer to P 135 OK R18124 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Check the connector for proper connection OK NO NO YES YES Check No 07 Check the input voltage of humidity sensor Connect the connector again for en...

Page 106: ... Hz Refrigerant shortage detection III When the difference of the temperature is smaller than A C it is regarded as refrigerant shortage 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 the discharge pipe thermistor indoor or outdoor heat exchanger thermistor room or outdoor temperature thermis...

Page 107: ...r 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 c...

Page 108: ... 150 V If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error 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 minute standby Supposed Causes Supply voltage is not as specified Defective DC vol...

Page 109: ... and the outdoor unit PCB Check the supply voltage Rotate the fan by hand Disturbance factors Noise Power supply distortion Repeat a few times Make sure the power has been off for at least 30 seconds Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Turn on the power again System restarted Does the fan rotate smoothly Voltage as specified NO...

Page 110: ...Any improper wiring YES Poor insulation OK Are the relay wires and the earth properly insulated Is the measured value 30 to 50 V YES NO NO Does LED A on the outdoor unit blink Disconnect No 3 Measure the voltage between No 2 and 3 Apply negative terminal to No 2 in DC range NO below 30 V or above 50 V Correct the relay wire between the indoor unit and the outdoor unit Replace the relay wire betwee...

Page 111: ...rk in order Signal transmission between the units cannot be performed for more than 15 seconds Zero cross signal cannot be detected for more than 10 seconds Supposed Causes Display disabled due to power supply fault Momentary fall of voltage Momentary power failure Defective varistor Defective fuse Defective thermal fuse on outdoor terminal board Defective terminal board Defective outdoor unit PCB...

Page 112: ...connection Does the fuse have continuity NO YES Wait for more than 10 sec Check the thermal fuse on the terminal board Does the fuse have continuity YES Continued to the next page 1 YES 5 V 0 5 V NO Check 5V and GND on the outdoor unit PCB Power on again Rectify the power supply Replace the varistor Replace the fuse Replace the thermal fuse on the terminal board Reconnect the terminal board connec...

Page 113: ...g insulation to ground Check grounding OK NO YES Does the LED A turn off 1 NO Check No 11 Power supply waveform check Continued from the previous page Carry out grounding work The cause seems to be an external factor other than the outdoor unit PCB Investigate source of noise and take measures Investigate the cause of disturbance and take remedial action Replace the outdoor unit PCB Reconnect the ...

Page 114: ...e microcomputer of the inverter can be successfully received Supposed Causes Defective outdoor unit PCB Troubleshooting R18133 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Does the error repeat NO Check blinking interval of LED 5 Is the interval 0 5 sec same as LED A YES 0 5 sec interval 5 V 0 5 V Check the voltage between 5V an...

Page 115: ...nnecting wires Wrong indoor unit PCB or outdoor unit PCB mounted Defective indoor unit PCB Defective outdoor unit PCB Troubleshooting R11707 Caution NO YES YES YES NO NO Check the code numbers 2P01234 for example of the indoor and outdoor unit PCB with the Parts List Match the compatible models Change for the correct PCB Replace the indoor unit PCB or the outdoor unit PCB OK Matched compatibly Cor...

Page 116: ...bleshooting How to check the preset hose length R13921 Caution Check the preset hose length with the remote controller Has the hose length been set YES NO Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Set the hose length with the remote controller To other UA fault diagnosis 1 Press the CLOCK button for 5 seconds is displayed 2 Press the...

Page 117: ...s not detected Supposed Causes Defective outdoor unit PCB Broken harness between PCBs Noise Momentary fall of voltage Momentary power failure Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged NO YES YES R18126 YES NO NO Replace the outdoor unit PCB Ground the system Zero cross signal abnormality Replace the outdoor un...

Page 118: ...down Reset condition 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 Disconnection of 2 terminals of OL Q1L Defective OL Q1L Broken OL harness Defective electronic expansion valve or coil Defective four way valve or coil Defective outdoor unit PCB Refrigerant sh...

Page 119: ... Replace the discharge pipe thermistor Replace the electronic expansion valve or the coil Refer to the refrigerant 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 ...

Page 120: ... power Disconnect the harnesses U V and W R18317 Caution NO YES YES NO NO YES Turn off the power and reconnect the harnesses Turn on the power again and restart the system Precaution before turning on the power again Make sure the power has been off for at least 30 seconds Correct the power supply or replace the outdoor unit PCB Replace the compressor Replace the compressor Check the outdoor elect...

Page 121: ...fan motor Foreign matters stuck in the fan Defective fan motor Defective outdoor unit PCB Troubleshooting Check No 16 Refer to P 140 R15675 Caution YES YES NO YES NO 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 fan motor Replace the outdoor ...

Page 122: ...e to turn off the power switch 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 R18318 NO YES YES NO Start operation and measure the input current Check No 18 Check the...

Page 123: ...dition continues over 10 minutes after operating for 5 minutes Cooling Dry room thermistor temp indoor heat exchanger temp 5 C Heating indoor heat exchanger temp room thermistor temp 5 C 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 harnes...

Page 124: ...clogged Reconnect the thermistor s Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged R18127 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 125: ...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 134 Check No 12 Refer to P 136 Check No 14 Refer to P 138 R15825 Caution NG OK OK OK NG NG Discharge pipe thermistor Outdoor heat exchanger thermistor Outdoor temperature ther...

Page 126: ...fective dehumidifying solenoid valve Troubleshooting Check No 01 Refer to P 134 Check No 12 Refer to P 136 Check No 17 Refer to P 141 Check No 18 Refer to P 141 Check No 19 Refer to P 142 Check No 23 Refer to P 144 R18128 Caution Replace the outdoor fan motor Reconnect the connector or fan motor lead wires Replace the stop valve Replace the outdoor heat exchanger thermistor Check No 23 Replace the...

Page 127: ...by DC current which is detected before compressor startup Error Decision Conditions When the DC voltage is 50 V or less Supposed Causes Defective outdoor unit PCB Harness disconnection improper connection Troubleshooting Replace the outdoor unit PCB Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged ...

Page 128: ...tops Supposed Causes Frost Foreign matter Defective limit switch including improper connection Defective damper motor Troubleshooting Is the damper fixed due to frost R13924 Caution Heat the damper unit and melt frost Error again NO YES YES Is the wire connection of limit switch LS loosen NO NO YES Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be d...

Page 129: ...circuit 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 ...

Page 130: ...ck No 20 Check the short circuit of the diode bridge 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 harnes...

Page 131: ...rrent Error Decision Conditions The compressor operation frequency is more than 62 Hz and the input current is less than 0 75 A 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 unit PCB Troubleshooting Replace the outdoor unit PCB Caution Be sure to turn off the power switch before connecting ...

Page 132: ...stor Error Decision Conditions The thermistor input is above 4 98 V or below 0 02 V with 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 Defective thermistor corresponding to the error code Defective heat exchanger thermistor in the case of J3 error outdoor heat exchange...

Page 133: ... s of the following thermistors Outdoor temperature thermistor Discharge pipe thermistor Outdoor heat exchanger thermistor Radiation fin 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...

Page 134: ...ditions With the compressor off the radiation fin temperature is above A C The error is cleared when the radiation fin temperature drops below B C 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 Supposed Causes Defective outdoor fan motor Short circuit Defective radiation fin thermistor Disconnection of c...

Page 135: ...ps below B C R18079 YES NO Slightly dirty NG Too dirty OK NO YES NO YES Turn off the power and turn it on again Check the radiation fin temperature Check No 17 Check the installation condition Radiation fin thermistor Radiation fin dirty Above A C Thermistor as specified in its characteristic chart Check No 01 Check the thermistor resistance value Check No 19 Check the outdoor fan or related Error...

Page 136: ...ture 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 n...

Page 137: ...heck the installation condition NO YES YES Radiation fin dirty Above A C Thermistor as specified in its characteristic chart Check No 01 Check the thermistor resistance value Check No 19 Check the outdoor fan or related Error displayed again Has the PCB been replaced Replace the radiation fin thermistor Check if the silicon grease is applied properly on the radiation fin If not apply the silicon g...

Page 138: ...he compressor is running A 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 interna...

Page 139: ...ff the power and reconnect the harnesses Turn on the power again and start operation Turn off the power and turn it on again to start 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 fall of power supply voltage Compressor overload Short circuit Keep on...

Page 140: ...e outdoor unit PCB Troubleshooting Check No 16 Refer to P 140 R18134 Is the connector for the humidifying fan motor S72 connected Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged YES YES YES YES Others Humidifying fan Humidifying fan Rotate the fan by hand after removing it Check No 16 Check for the rotation pulse input of outdoor u...

Page 141: ...e main relay Blown thermal fuse Defective heater control part Extremely low voltage Troubleshooting Check No 01 Refer to P 134 R18135 Caution YES YES YES Is the supply voltage appropriate Turn off the power supply YES NO NO NO NO Is the heater resistance appropriate At normal temperature 44 6 Ω 10 Is the thermal fuse blown NO YES Check No 01 Is a resistance of the humidifying thermistor appropriat...

Page 142: ...or is abnormal Error Decision Conditions When the power is supplied and the thermistor input is 4 92 V or more or 0 06 V or less The humidifying fan outlet temperature 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 143: ...tor within normal range Check No 01 Thermistor resistance check Is the heater cooled well after the power supply turned off Include inside the humidification hose and indoor air supply filter Caution R18136 At normal temperature 44 6 Ω 10 Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Reconnect the connector properly The humidifying therm...

Page 144: ...ermistor is directly mounted on the humidity sensor PCB disconnect the connector of humidity sensor PCB from the control PCB to measure the resistance When the connector of indoor heat exchanger thermistor is soldered on the 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...

Page 145: ...e humidity temperature airflow rate To do this merely breathe upon 3 4 Power Supply Waveforms Check Check No 11 Measure the power supply waveform between No 1 and No 2 on the terminal board and check the waveform disturbance Check 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 7 6 5 4 3 2 1 S1 R12...

Page 146: ...und in the above step 2 disconnect the connector and check the continuity using a tester 4 Check the continuity between the pins 1 6 3 6 2 5 4 5 between the pins 1 6 2 6 3 6 4 6 for the harness 5P models If there is no continuity between the pins the EV coil is faulty 5 If the continuity is confirmed in step 3 the outdoor unit PCB is faulty Note Please note that the latching sound varies depending...

Page 147: ...starts and then at about 12 15 VDC Fig 1 Turn off the power and turn it on again Replace the outdoor unit PCB NO YES S80 voltage at 0 VDC with compressor on 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 3 sec Caution on resetting the power supply Be sure to wait for 30 sec or more after turning off the power supply Co...

Page 148: ...pressor and check the output of the inverter Operation Method Step 1 Be sure to turn the power off Step 2 Install an inverter analyzer instead of a compressor Note Make sure the charged voltage of the built in smoothing electrolytic capacitor drops to 10 VDC or below before carrying out the service work Refrigerant system check Check for refrigerant leakage See the service diagnosis on refrigerant...

Page 149: ...g to 6 LEDs lighting status 1 If all the LEDs are lit uniformly the compressor is defective Replace the compressor 2 If the LEDs are not lit uniformly check the power module Refer to Check No 22 3 If NG in Check No 22 replace the power module Replace the PCB The power module is united with the PCB If OK in Check No 22 check if there is any solder cracking on the PCB 4 If any solder cracking is fou...

Page 150: ... 0 15 VDC are output at the pins 1 4 when the fan motor is rotated 1 turn by hand If NG in step 2 Defective outdoor unit PCB Replace the outdoor unit PCB If NG in step 4 Defective Hall IC Replace the outdoor fan motor If OK in both steps 2 and 4 Replace the outdoor unit PCB For hygroscopic fan motor Check that the connectors HK1 HK2 HK3 for proper connection 1 Check that the power supply voltage 5...

Page 151: ...rty 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 R15738 Not dirty YES YES Dirty NO NO NO YES Is the air filter or indoor outdoor heat exchanger dirty Is the connection pipe deformed I...

Page 152: ...stance is or less than 1 kΩ short circuit occurs on the main circuit Solder side R15001 YES YES NO NO Outdoor fan system is functioning Check the outdoor fan system Go to Check No 16 Outdoor fan running Fan motor lead wire connector disconnected Reconnect the connector Negative terminal of tester positive terminal for digital tester 2 3 4 2 3 1 Positive terminal of tester negative terminal for dig...

Page 153: ...the connector Follow the procedure below to measure resistance between the terminals of the power module and the terminals of the compressor with a multi tester Evaluate the measurement results referring to the following table Negative terminal of tester positive terminal for digital tester Power module UVW Power module UVW Positive terminal of tester negative terminal for digital tester UVW Power...

Page 154: ...e coils Disconnect the connecter S43 Within the range of 10 60 Ω Dehumidifying solenoid valve failure is suspected YES Faulty criterion In dehumidification test operation mode PCB is identified defective when the dehumidifying solenoid valves do not turn on within 2 seconds after compressor start up When dehumidifying solenoid valves are not used the operation mode is similar to cooling operation ...

Page 155: ...d Field Settings 1 Pump Down Operation 146 2 Forced Cooling Operation 147 3 Trial Operation 148 4 Field Settings 149 4 1 Humidifying Hose Length Setting 149 4 2 When 2 Units are Installed in 1 Room 150 4 3 Jumper Settings 150 5 Silicon Grease on Power Transistor Diode Bridge 151 ...

Page 156: ...the unit Detail 1 Remove the valve caps from the liquid stop valve and the gas stop valve 2 Carry out forced cooling operation 3 After 5 to 10 minutes close the liquid stop valve with a hexagonal wrench 4 After 2 to 3 minutes close the gas stop valve and stop the forced cooling operation Refer to page 147 for forced cooling operation R14035 Close Gas stop valve Liquid stop valve Valve cap Hexagona...

Page 157: ...it is not operating Start Press the forced cooling operation ON OFF button SW1 on the indoor unit for 5 seconds Command frequency 58 Hz End The forced cooling operation ends when any of the following conditions is fulfilled 1 The operation ends automatically after 15 minutes 2 Press the forced cooling operation ON OFF button SW1 on the indoor unit again 3 Press the ON OFF button on the remote cont...

Page 158: ... up the operation mode The system then restarts operation with the previous operation mode when the circuit breaker is restored In cooling operation select the lowest programmable temperature 18 C in heating operation select the highest programmable temperature 30 C Trial operation may be disabled in either operation mode depending on the room temperature After trial operation is complete set the ...

Page 159: ...on the indoor unit the display shows on the step 5 but the remote controller remembers the set hose length When the customer turns the indoor unit on the hose length information is sent to the indoor unit R14036 CLOCK button Display SELECT button 1 Press the CLOCK button for 5 seconds is displayed 2 Press the SELECT or button and select 3 Press the CLOCK button to activate the hose length setting ...

Page 160: ...tronic circuit Improper operation may occur if you cut any of them For the location of the jumper refer to the following pages Indoor unit page 10 Outdoor unit page 13 Electrical box Cut JA R14037 Jumper R18328 J4 Jumper Function When connected factory set When cut JB on indoor unit PCB Fan speed setting when compressor stops for thermostat OFF effective only at cooling operation Fan speed setting...

Page 161: ... bridge 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...

Page 162: ...SiBE04 624_B 152 Appendix Part 8 Appendix 1 Piping Diagrams 153 1 1 Indoor Unit 153 1 2 Outdoor Unit 153 2 Wiring Diagrams 154 2 1 Indoor Unit 154 2 2 Outdoor Unit 154 3 Removal Procedure Booklet No 155 ...

Page 163: ... CLOSED UNDERDEHUMIDIFICATION OPERATION 4D054058C OUTDOOR UNIT HEAT EXCHANGER 7 9CuT 7 9CuT 12 7CuT 7 0CuT 7 0CuT 7 0CuT 6 4CuT 6 4CuT 6 4CuT FILTER FILTER FAN MOTOR M 6 4CuT PROPELLER FAN 9 5CuT 12 7CuT MUFFLER 12 7CuT 6 4CuT 7 9CuT MUFFLER REFRIGERANT FLOW MUFFLER COOLING 9 5CuT COMPRESSOR 7 9CuT HEATING 12 7CuT HEAT EXCHANGER THERMISTOR AUXILIARY HEAT EXCHANGER MOTOR OPERATED VALVE MUFFLER WITH...

Page 164: ...L RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN 3D052768D FIELD WIRING INDOOR L1R 1 YLW S45 YLW 3 MRM20 IPM1 102 C PPL ORG FU3 Z1C DB1 HL1 30A N 4 BLK L 1 1 MRM10 HN1 HR1 HR2 WHT 2 N 2 V2 RED S 3 3 GRN YLW U V W DB2 V3 E2 YLW Z4C X1M L N 2 FU1 Z2C SA1 N 3 15A N 3 FU2 E1 3 15A GRN YLW GRN PCB1 X1A IPM701 MRK HK3 U RED RED HK2 M WHT WHT HK1 V BLK BLK M3F MR4 HH1...

Page 165: ...cedure Booklet No Appendix 155 3 Removal Procedure Booklet No Refer to the following booklets for removal procedure FTXR28 42 50EV1B9 Refer to Si041260 RXR28 42 50EV1B9 Refer to SiBE04 624_A RXR28 42 50EV1B8 Refer to Si001275 ...

Page 166: ...ision History Month Year Version Revised contents 08 2006 SiBE04 624 First edition 01 2007 SiBE04 624_A Model change FTXR28 42 50EV1B9 RXR28 42 50EV1B9 12 2012 SiBE04 624_B Model addition RXR28 42 50EV1B8 ...

Page 167: ...es 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 instruction...

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Daikin SiBE04-624_B_FTXR-E, Service Manual

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