Daikin FTXN09KEVJU Service Manual Download Page 241

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SiUS041111

Wiring Diagrams

Appendix

233

2. Wiring Diagrams

2.1

Indoor Unit

FTXN09/12KEVJU

FTXN15/18/24KVJU

PCB 2

PCB 1

S26

S27

FIELD WIRING.

BLK

GRN/YLW

LED1 H1P

BLK

LED2 H2P

BLK

GRN

BLK

RECTIFIER

BLK

–

RED

BLK

OUTDOOR

MR10

WHT

CAUTION

BLK

S1W

F1U

t˚

X1M

3.15A

–

R1T

IPM200

S403

S32

S200

INDOOR

BLK BLK

BLK

BLU

BLK

RED

WHT

ORG

S601

S602

t˚

M1S

M1F

R2T

NOTE)

S21

PCB 3

OPTION

SIGNAL

RECEIVER

WIRELESS

REMOTE

CONTROLLER

1.PCB3 SHOWS THE CASE OF

OPTION CONNECTION.

TRANSMISSION

CIRCUIT

NOTE THAT OPERATION WILL
RESTART AUTOMATICALLY IF
THE MAIN POWER SUPPLY IS
TURNED OFF AND THEN BACK
ON AGAIN.

: FRAME GROUND

: FUSE

: HARNESS

: PILOT LAMP

: FAN MOTOR

: SWING MOTOR

: PRINTED CIRCUIT BOARD

: THERMISTOR
: CONNECTOR

: OPERATION SWITCH

: TERMINAL STRIP

: PROTECTIVE GROUND

C: 3D065939B

F1U

H1~H3

H1P~H2P

M1F

M1S

PCB1~PCB3

R1T, R2T

S6~S602

S1W

X1M

OUTDOOR

INDOOR

LED1

H1P

RECTIFIER

FIELD WIRING.

S1W

3.15A

LED2

H2P

WHT

R2T

S21

BRN

M1F

GRN

S28

PCB4

S29

S26

ORG

PNK

M1S

S37

S27

BLK

PCB3

YLW

ORG

PCB1

R1T

RED

PCB2

BLU

RED

S32

WHT

S38

CAUTION

NOTE THAT OPERATION WILL
RESTART AUTOMATICALLY IF
THE MAIN POWER SUPPLY IS
TURNED OFF AND THEN BACK
ON AGAIN.

TRANSMISSION

CIRCUIT

WIRELESS

REMOTE

CONTROLLER

SIGNAL

RECEIVER

H1~H3

H1P~H2P
M1F

M1S
PCB1~PCB4

R1T, R2T

S1~S38

S1W

X1M

: FRAME GROUND

: FUSE
: HARNESS

: PILOT LAMP

: FAN MOTOR
: SWING MOTOR

: PRINTED CIRCUIT BOARD

: THERMISTOR
: CONNECTOR

: OPERATION SWITCH
: TERMINAL STRIP
: PROTECTIVE GROUND

C: 3D038532H

Summary of Contents for FTXN09KEVJU

Page 1: ...Service Manual Inverter Pair Wall Mounted Type K Series SiUS041111 Applied Models Inverter Pair Cooling Only Inverter Pair Heat Pump...

Page 2: ...Indoor Unit FTXN09KEVJU FTXN12KEVJU FTXN15KVJU FTXN18KVJU FTXN24KVJU Outdoor Unit RKN09KEVJU RKN12KEVJU RKN15KEVJU RKN18KEVJU RKN24KEVJU Heat Pump Indoor Unit FTXN09KEVJU FTXN12KEVJU FTXN15KVJU FTXN1...

Page 3: ...2 15 18 24 Class 18 Part 4 Function and Control 20 1 Main Functions 21 1 1 Temperature Control 21 1 2 Frequency Principle 21 1 3 Airflow Direction Control 23 1 4 Fan Speed Control for Indoor Unit 24 1...

Page 4: ...IMER Operation 60 2 8 ON TIMER Operation 61 3 15 18 24 Class 62 3 1 Remote Controller 62 3 2 AUTO DRY COOL HEAT FAN Operation 64 3 3 Adjusting the Airflow Direction and Rate 66 3 4 POWERFUL Operation...

Page 5: ...2 Fan Motor Connector Output Check 117 5 3 Power Supply Waveforms Check 118 5 4 Electronic Expansion Valve Check 118 5 5 Four Way Valve Performance Check 119 5 6 Inverter Unit Refrigerant System Check...

Page 6: ...al of Electrical Box 198 4 4 Removal of PCBs 206 4 5 Removal of Sound Blankets 213 4 6 Removal of Electronic Expansion Valve AssemblyASSY 216 4 7 Removal of Four Way Valve 217 4 8 Removal of Compresso...

Page 7: ...Use only pipes flare nuts tools and other materials designed specifically for R410A refrigerant systems Never use tools or materials designed for R22 refrigerant systems on an R410A refrigerant syste...

Page 8: ...em replaced Damaged cable and wires may cause an electrical shock or fire Do not use a joined power cable or an extension cord or share the same power outlet with other electrical appliances as it may...

Page 9: ...SiUS041111 List of Functions 1 Part 1 List of Functions 1 Functions 2...

Page 10: ...Right and Left Self Diagnosis Digital LED Display 3 D Airflow Wiring Error Check Function COMFORT AIRFLOW Operation Anti Corrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed F...

Page 11: ...after Power Failure 3 D Airflow Self Diagnosis Digital LED Display COMFORT AIRFLOW Operation Wiring Error Check Function Comfort Control Auto Fan Speed Anticorrosion Treatment of Outdoor Heat Exchang...

Page 12: ...SiUS041111 4 Specifications Part 2 Specifications 1 Specifications 5 1 1 Cooling Only 5 1 2 Heat Pump 8...

Page 13: ...Washable Mildew Proof Running Current Rated A 0 20 0 18 0 20 0 18 Power Consumption Rated W 40 40 Power Factor 96 2 96 6 96 2 96 6 Temperature Control Microcomputer Control Microcomputer Control Dime...

Page 14: ...hable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 17 0 15 0 17 0 15 Power Consumption Rated W 34 34 34 34 Power Factor 96 2 98 6 96 2 98 6 Temperature Control Microcomputer...

Page 15: ...l Downward Air Filter Removable Washable Mildew Proof Running Current Rated A 0 17 0 15 Power Consumption Rated W 34 34 Power Factor 96 2 98 6 Temperature Control Microcomputer Control Dimensions H W...

Page 16: ...wnward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 20 0 18 0 20 0 18 Power Consumption Rated W 40 40 Power Factor 96 2 96 6 96 2 96 6 Temperatu...

Page 17: ...ir Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 17 0 15 0 18 0 16 0 17 0 15 0 18 0 16 Power Consumption Rated W 34 34 36 36 34 34 36 36 Power Factor...

Page 18: ...rd Air Filter Removable Washable Mildew Proof Running Current Rated A 0 17 0 15 0 18 0 16 Power Consumption Rated W 34 34 36 36 Power Factor 96 2 98 6 96 2 97 8 Temperature Control Microcomputer Contr...

Page 19: ...ed Circuit Board Connector Wiring Diagram 11 Part 3 Printed Circuit Board Connector Wiring Diagram 1 Indoor Unit 12 1 1 09 12 Class 12 1 2 15 18 24 Class 14 2 Outdoor Unit 16 2 1 09 12 Class 16 2 2 15...

Page 20: ...Connector for adaptor PCB option 6 H1 H2 H3 FG Connector for terminal board 7 V1 Varistor 8 JA Address setting jumper Refer to page 225 for detail JB Fan speed setting when compressor stops for thermo...

Page 21: ...r Unit Printed Circuit Board Connector Wiring Diagram 13 PCB Detail PCB 1 Control PCB PCB 2 Display PCB FU1 H1 H3 V1 H2 FG S200 LED A S32 S26 S6 JA JC JB S403 2P206569 4 S27 SW1 Solder side LED2 LED1...

Page 22: ...anger thermistor 7 H1 H2 H3 FG Connector for terminal board 8 JA Address setting jumper Refer to page 225 for detail JB Fan speed setting when compressor stops for thermostat OFF JC Power failure reco...

Page 23: ...g Diagram 15 PCB Detail PCB 1 Control PCB PCB 2 Signal Receiver PCB PCB 3 Buzzer PCB PCB 4 Display PCB LED3 does not function S1 V1 FU1 S6 2P099167 2 JC JB JA LED A S21 H1 S26 S28 H2 H3 FG S32 SW1 S29...

Page 24: ...r 6 FU1 Fuse 3 15 A 250 V 7 FU3 Fuse 20 A 250 V 8 V2 V3 Varistor 1 S10 Connector for filter PCB 2 S20 Connector for electronic expansion valve coil 3 S40 Connector for overload protector 4 S70 Connect...

Page 25: ...nit Printed Circuit Board Connector Wiring Diagram 17 PCB Detail PCB 1 Filter PCB PCB 2 Main PCB HR1 S11 HL2 HN2 E1 E2 V2 AC2 AC1 S FU3 3P257381 1 V3 FU1 S70 S10 S90 LED A S40 S20 S80 HL3 HN3 FU2 HR2...

Page 26: ...3 Fuse 30 A 250 V 8 V2 V3 Varistor 9 SW1 Forced cooling operation ON OFF switch 1 S10 Connector for S11 on filter PCB 2 S12 Connector for HL4 HN4 on filter PCB 3 S20 Connector for electronic expansion...

Page 27: ...Printed Circuit Board Connector Wiring Diagram 19 PCB Detail PCB 1 Filter PCB PCB 2 Main PCB 3P273862 1 SW1 S11 FU1 FU3 V2 V3 E2 E1 HN2 HL2 HN4 HL4 S HL1 HN1 S80 S10 2P273854 1 S70 S20 S40 S90 FU2 LED...

Page 28: ...ONO Operation 29 1 10 Inverter POWERFUL Operation 30 1 11 Other Functions 31 2 Function of Thermistor 32 3 Control Specification 33 3 1 Mode Hierarchy 33 3 2 Frequency Control 34 3 3 Controls at Mode...

Page 29: ...the room depending on the type of the indoor unit or installation condition Practically the temperature control is done by the target temperature appropriately adjusted for the indoor unit and the te...

Page 30: ...ep the room temperature constant Energy saving heating and cooling Once the set temperature is reached the energy saving operation enables to maintain the room temperature at low power Phase Descripti...

Page 31: ...ic synthetic resin provide a wide range of airflow that guarantees a comfortable air distribution Auto Swing The following table explains the auto swing process for cooling dry heating and fan COMFORT...

Page 32: ...tomatic Cooling The following drawing explains the principle of fan speed control for cooling 09 12 class In automatic fan speed operation upper limit is at M tap in 30 minutes from the operation star...

Page 33: ...en the room thermistor temperature at start up and the target temperature is divided into two zones Then the unit operates in the dry mode with an appropriate capacity for each zone to maintain the te...

Page 34: ...ines the target temperature Tt Ts 18 30 C 64 4 86 F 2 The target temperature Tt is calculated as Tt Ts C where C is the correction value C 0 C 0 F 3 Thermostat ON OFF point and mode switching point ar...

Page 35: ...m 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 minute...

Page 36: ...le sleeping conditions and also conserves electricity Cooling 09 12 class 15 18 24 class Heating R14453 TIMER operation NIGHT SET Mode ON Target temperature 0 5 C 0 9 F temperature shift Operation sto...

Page 37: ...d from the wireless remote controller by pushing the ECONO button When this function is activated the maximum capacity also decreases The remote controller can send the ECONO command when the unit is...

Page 38: ...POWERFUL operation in cooling mode Operation mode Fan speed Target temperature COOL H tap A rpm 18 C 64 4 F DRY Dry rotating speed A rpm Lowered by 2 5 C 4 5 F HEAT H tap A rpm 31 32 C 87 8 89 6 F FAN...

Page 39: ...on 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 222 for detail Note When the ON OFF button is pressed for 10 s...

Page 40: ...mpressor rises abnormally the operating frequency becomes lower or the operation halts 2 The discharge pipe thermistor is used for detecting disconnection of the discharge pipe thermistor 3 Indoor Hea...

Page 41: ...tion command is regarded as cooling operation R14428 Air conditioner control mode Forced operation mode Forced cooling operation Power transistor test mode Normal operation mode Fan Cooling includes d...

Page 42: ...nctions Compressor protection input current discharge pipe temperature freeze up protection 3 Determine lower limit frequency The maximum value is set as an lower limit frequency among the frequency l...

Page 43: ...requency Up Down by D Signal 1 P control The D value is calculated in each sampling time 20 seconds and the frequency is adjusted according to its difference from the frequency previously calculated 2...

Page 44: ...scharge pipe temperature 20 C 68 F OFF condition Discharge pipe temperature 22 C 71 6 F Radiation fin temperature 90 C 194 F 15 18 24 class ON Condition When the discharge pipe temperature is below 10...

Page 45: ...heating after defrosting 5 When starting compressor for the first time after resetting with the power ON 6 When starting compressor after the fault of switching over cooling heating The lower limit of...

Page 46: ...cification SiUS041111 38 Function and Control 15 18 24 class A Hz 52 B Hz 66 C Hz 78 D Hz Cooling 98 Heating 96 E seconds 120 F seconds 120 G seconds 480 H seconds 60 sec Time R13906 Hz Frequency C D...

Page 47: ...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...

Page 48: ...y 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 L...

Page 49: ...rmal high pressure Detail R14664 Reset zone Indoor heat exchanger thermistor temperature Up zone Keep zone Dropping zone Stop zone 13 C 55 4 F Reference 7 C 44 6 F 5 C 41 F 3 C 37 4 F 0 C 32 F Zone Co...

Page 50: ...of the outdoor fan is reduced by the command of the indoor unit quiet operation 7 Fan speed control for POWERFUL operation 15 18 24 class The rotation speed of the outdoor fan is increased while the P...

Page 51: ...than 28 minutes of accumulated time pass since the start of the operation or ending the previous defrosting 09 12 class More than 15 25 minutes depending on the duration of the previous defrost contr...

Page 52: ...gment is made with outdoor heat exchanger temperature 6 30 C 42 8 86 F Frequency Compressor Four way valve Fan ON OFF ON OFF ON OFF 0 Hz 76 Hz 8 sec 400 pulse 450 pulse 450 pulse Initial opening PI co...

Page 53: ...ontrol h function not function Cooling h h h h h h h h h h h h h h h h h h h h h h h h h h h h h Heating R14458 h h h h h h Starting control Control when the frequency changes Target discharge pipe te...

Page 54: ...g 3 11 4 Starting Operation Control The electronic expansion valve opening is controlled when the operation starts and prevents the superheating or liquid compression 3 11 5 Control when the frequency...

Page 55: ...exchanger temperature 2 When the operation mode is heating When the following condition is fulfilled the discharge pipe thermistor disconnection is ascertained Discharge pipe temperature 6 C 10 8 F i...

Page 56: ...l Outline I Detecting by power consumption If the power consumption is below the specified value and the frequency is higher than the specified frequency it is regarded as refrigerant shortage The pow...

Page 57: ...e Airflow Direction and Rate 55 2 4 COMFORT AIRFLOW Operation 57 2 5 POWERFUL Operation 58 2 6 ECONO Operation 59 2 7 OFF TIMER Operation 60 2 8 ON TIMER Operation 61 3 15 18 24 Class 62 3 1 Remote Co...

Page 58: ...at well and how to use it efficiently Providing instructions to the user can reduce requests for servicing by 80 However proficient the installation and operating functions of the AC system are the cu...

Page 59: ...drop the remote controller Do not get it wet The maximum distance for communication is approximately 23ft 7m FAN setting button Selects the airflow rate setting Page14 Page16 POWERFUL button POWERFUL...

Page 60: ...AT FAN Page11 Page 18 19 COMFORT button COMFORT AIRFLOW operation OFF TIMER button Cancels the timer setting Page 15 Page18 TIMER CANCEL button Page 18 19 ECONO button ECONO operation Page 17 Page 13...

Page 61: ...he air conditioner The heat pump system heats the room by circulating hot air around all parts of the room After the start of HEAT operation it takes some time before the room gets warmer In HEAT oper...

Page 62: ...g The outdoor unit consumes 3 4 34btu h 1 10W to have its electric components work even while it is not operating During standby electricity saving mode about 3 4btu h 1W The outdoor unit consumes abo...

Page 63: ...desired position This function is effective while louver is in auto swing mode Press when the louver has reached the desired position The louver will stop moving is no longer displayed on the LCD To...

Page 64: ...kept stopped in the downward direction the louver will automatically start operating in approximately an hour in order to prevent dew condensation Note on airflow rate setting At smaller airflow rate...

Page 65: ...The louver will go down To cancel COMFORT AIRFLOW operation Press again The louver will return to the memory position from before COMFORT AIRFLOW operation is no longer displayed on the LCD COOL opera...

Page 66: ...or 20 minutes Back to normal operation NOTE Notes on POWERFUL operation When using POWERFUL operation there are some functions which are not available POWERFUL operation cannot be used together with E...

Page 67: ...ECONO operation The circuit breaker is unlikely to trip even if the air conditioner and other appliances are used at same time This diagram is a representation for illustrative purposes only The maxi...

Page 68: ...t in the memory The memory is canceled when remote controller batteries are replaced When operating the unit via the ON OFF TIMER the actual length of operation may vary from the time entered by the u...

Page 69: ...utes Holding down either button changes the setting rapidly 3 Press again and setting time are displayed on the LCD The TIMER lamp lights yellow Display Press and setting time are no longer displayed...

Page 70: ...e remote controller Do not get it wet The maximum distance for communication is approximately 23ft 7m Selects the airflow rate setting FAN setting button Page14 POWERFUL button POWERFUL operation Page...

Page 71: ...e operation mode AUTO DRY COOL HEAT FAN MODE selector button Page16 OFF TIMER button TIMER CANCEL button Cancels the timer setting Page16 17 Page16 17 Changes the ON OFF TIMER settings SELECT button C...

Page 72: ...bination with the air conditioner The heat pump system heats the room by circulating hot air around all parts of the room After the start of HEAT operation it takes some time before the room gets warm...

Page 73: ...bout every 2 weeks Notes on the operating conditions The air conditioner always consumes a small amount of electricity even while it is not operating If you are not going to use the air conditioner fo...

Page 74: ...LCD The louvers horizontal blades will begin to swing This function is effective while louvers are in auto swing mode Press when the louvers have reached the desired position The louvers will stop mov...

Page 75: ...and fins forcibly with hand when they are swinging the mechanism may be broken Be careful when adjusting the fins Inside the air outlet a fan is rotating at a high speed At smaller airflow rates the c...

Page 76: ...ure setting is lowered by 4 5 F 2 5 C and the airflow rate is slightly increased In FAN operation The airflow rate is fixed to the maximum setting 15 Example POWERFUL Operation POWERFUL operation quic...

Page 77: ...hanges the time setting rapidly 3 Press again and setting time are displayed on the LCD The TIMER lamp lights yellow Display Press and setting time are no longer displayed on the LCD and day of the we...

Page 78: ...inutes Holding down either button changes the setting rapidly 3 Press again and setting time are displayed on the LCD The TIMER lamp lights yellow Display Press and setting time are no longer displaye...

Page 79: ...4 13 Four Way Valve Abnormality 94 4 14 Discharge Pipe Temperature Control 96 4 15 High Pressure Control in Cooling 98 4 16 Compressor System Sensor Abnormality 100 4 17 Position Sensor Abnormality 10...

Page 80: ...SiUS041111 72 Service Diagnosis 5 11 Outdoor Fan System Check 124 5 12 Main Circuit Short Check 125 5 13 Power Module Check 126...

Page 81: ...n a signal transmission error occurs between the indoor and outdoor units In either case conduct the diagnostic procedure described in the following pages Service Monitor The indoor unit has one green...

Page 82: ...Check the outdoor temperature Heating operation cannot be used when the outdoor temperature is 24 C 75 2 F or higher and cooling operation cannot be used when the outdoor temperature is below 10 C 50...

Page 83: ...nding codes 2 To return to the normal mode hold the timer cancel button down for 5 seconds When the remote controller is left untouched for 60 seconds it also returns to the normal mode 3 Not all the...

Page 84: ...until you hear the beep s 3 Diagnose by the sound beep The left side number does not correspond with the error code beep beep The left side number corresponds with the error code but the right side nu...

Page 85: ...ght side numbers correspond with the error code Error codes and description Refer to page 78 7 Determine the error code The numbers indicated when you hear the long beep are the error code Error codes...

Page 86: ...85 C9 Room temperature thermistor or related abnormality 85 Outdoor Unit E1 Outdoor unit PCB abnormality 89 E5 OL activation compressor overload 90 E6 Compressor lock 91 E7 DC fan lock 92 E8 Input ove...

Page 87: ...on of connector Troubleshooting Note Check the following connector Check the combination of the indoor and outdoor unit OK OK Check the connection of connectors See Note Correct the connection Error r...

Page 88: ...ating operation the temperature detected by the indoor heat exchanger thermistor is used for the heating peak cut control operation halt outdoor fan stop etc Malfunction Decision Conditions Freeze up...

Page 89: ...an the air filter Clean the indoor heat exchanger Replace the indoor unit PCB Replace the thermistor Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be...

Page 90: ...fan motor operation Malfunction 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...

Page 91: ...er on again Check No 03 Check the motor control voltage Is the motor control voltage 15 VDC generated Check No 03 Check the indoor unit PCB for rotation pulse Is the rotation pulse generated NO YES YE...

Page 92: ...disconnecting connectors or parts may be damaged R14436 NO YES YES NO YES NO Replace the indoor fan motor Replace the indoor unit PCB Replace the indoor unit PCB Replace the indoor fan motor Replace...

Page 93: ...pressor operation Supposed Causes Disconnection of connector Defective thermistor Defective indoor unit PCB Troubleshooting Check No 01 Refer to P 116 C4 Indoor heat exchanger thermistor C9 Room tempe...

Page 94: ...nit in indoor unit outdoor unit signal transmission is checked whether it is normal Malfunction Decision Conditions The data sent from the outdoor unit cannot be received normally or the content of th...

Page 95: ...ng error Properly insulated Check the LED A on the outdoor unit PCB Is LED A blinking Is there any disturbance YES YES Replace the indoor unit PCB Locate the cause of the disturbance of the power supp...

Page 96: ...ring of connecting 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 numbe...

Page 97: ...ross signal is 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 t...

Page 98: ...stop valve Troubleshooting Check No 01 Refer to P 116 Check No 12 Refer to P 118 Check No 13 Refer to P 119 Check No 14 Refer to P 119 R14438 Caution YES NG NO OK OK NG NG OK NG OK Refrigerant shorta...

Page 99: ...on NO YES YES NO NO YES Correct the power supply or replace the outdoor unit PCB Inverter checker Part No 1225477 Replace the compressor Replace the compressor Check the electronic expansion valve Rep...

Page 100: ...es Disconnection of fan motor Foreign matters stuck in the fan Defective fan motor Defective outdoor unit PCB Troubleshooting Check No 16 Refer to P 122 R14410 Caution YES YES NO YES NO NO YES NO Turn...

Page 101: ...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...

Page 102: ...unction Decision Conditions A following condition continues over 10 minutes after operating for 5 minutes Cooling Dry room thermistor temp indoor heat exchanger temp 5 C 9 F Heating indoor heat exchan...

Page 103: ...000 2000 W Check No 13 Check the four way valve switching output Any thermistor disconnected Check No 01 Check the thermistors Check No 14 Check the refrigerant line NG OK NO OK NG OK YES NG Correct i...

Page 104: ...for about 60 minutes without any other error Supposed Causes Defective discharge pipe thermistor Defective outdoor heat exchanger thermistor or outdoor temperature thermistor Defective electronic exp...

Page 105: ...check procedure Replace the outdoor unit PCB Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Check No 01 Check the thermistors Check No 12 C...

Page 106: ...changer thermistor exceeds the limit Malfunction Decision Conditions The temperature sensed by the outdoor heat exchanger thermistor rises above about 60 C 140 F The error is cleared when the temperat...

Page 107: ...utdoor unit PCB Replace the electronic expansion valve or the coil Replace the outdoor unit PCB Change the installation location or direction Clean the outdoor heat exchanger Check the installation sp...

Page 108: ...verted to voltage value The DC voltage before compressor start up is below 50 V Supposed Causes Broken or disconnection of harness Defective outdoor unit PCB Troubleshooting Caution Be sure to turn of...

Page 109: ...tion circuit Malfunction Decision Conditions The compressor fails to start in about 15 seconds after the compressor run command signal is sent If the error repeats the system is shut down Reset condit...

Page 110: ...lace the outdoor unit PCB Replace the compressor Correct the power supply or replace the outdoor unit PCB Reconnect them as specified Replace the outdoor unit PCB Inverter checker Part No 1225477 NO Y...

Page 111: ...cy and the input current Malfunction Decision Conditions The compressor running frequency is above 52 Hz The input current is also below 0 1 A If the error repeats the system is shut down Reset condit...

Page 112: ...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 Defective thermistor...

Page 113: ...ors Outdoor temperature thermistor Discharge pipe thermistor Outdoor heat exchanger thermistor Cooling Outdoor heat exchanger temperature Heating Indoor heat exchanger temperature Replace the indoor h...

Page 114: ...ff the radiation fin temperature is above A The error is cleared when the radiation fin temperature drops below B To cool the electrical components the outdoor fan starts when the radiation fin temper...

Page 115: ...ck the radiation fin temperature Turn off the power and turn it on again WARNING Replace the outdoor unit PCB Replace the fan motor Correct the connectors and fan motor lead wire Replace the outdoor u...

Page 116: ...ssor on is above A The error is cleared when the radiation fin temperature drops below B If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any ot...

Page 117: ...ove A Check No 17 Check the installation condition Check if the silicon grease applied properly on the radiation fin If not apply it See Note Replace the outdoor unit PCB Replace the fan motor Correct...

Page 118: ...occurs while the 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 t...

Page 119: ...ter checker Part No 1225477 Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Stop valve fully open Error again Check No 15 Check with the inve...

Page 120: ...tronic expansion valve D Discharge pipe temperature C E target discharge pipe temperature C F C Discharge pipe temperature F E target discharge pipe temperature F G F Refrigerant shortage detection II...

Page 121: ...nsistor harness for looseness Correct it as required Also replace the cracked pipe Check the pipes for improper contact Correct them as required Also replace the cracked pipe Replace the electronic ex...

Page 122: ...tage detected by the DC voltage detection circuit is below about 200 V The compressor stops if the error occurs and restarts automatically after 3 minute standby Over voltage detection An over voltage...

Page 123: ...efore connecting or disconnecting connectors or parts may be damaged NO NO YES NO YES YES Reconnect it Repeat a few times Precaution before turning on the power again Make sure the power has been off...

Page 124: ...for the PCB and measure Thermistor temperature C F Resistance k Room temperature thermistor for 09 12 class model Other thermistors 20 4 73 4 211 0 15 5 57 0 150 0 10 14 44 7 116 5 5 23 35 3 88 0 0 3...

Page 125: ...n the pins 12 9 and between 9 6 Motor control voltage check 1 Check the connector for connection 2 Check the motor control voltage is generated between the pins 2 3 Rotation pulse check 1 Check the co...

Page 126: ...valve EV 1 Check to see if the EV connector is correctly connected to the PCB 2 Turn the power off and on again and check to see if the EV generate latching sound 3 If the EV does not generate latchi...

Page 127: ...coil from the connector and check the continuity Four way valve coil resistance at 1000 2000 W S80 voltage at 208 230 VAC with compressor on Fig 1 Replace the outdoor unit PCB Replace the four way va...

Page 128: ...f Step 2 Install the inverter checker 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 servi...

Page 129: ...ation starts Diagnose method Diagnose according to 6 LEDs lighting status 1 When all the LEDs are lit uniformly the compressor is defective Replace the compressor 2 When the LEDs are not lit uniformly...

Page 130: ...4 Check that the rotation command voltage between the pins 2 4 is 0 15 VDC 5 Keep operation off and power off Connect the connector S70 6 Check whether 2 pulses 0 15 VDC are output at the pins 1 4 wh...

Page 131: ...opposite direction R14468 NG YES YES YES Is the discharged air short circuited NO NO NO Is the outdoor heat exchanger very dirty Change the installation location or direction Change the installation...

Page 132: ...sor Open the stop valve Replace the pipe installed at the site Clean the dirty one Replace the compressor High Is the stop valve open Is the connection pipe deformed Not dirty Dirty YES NO NO YES YES...

Page 133: ...Measure the resistance between the pins of the DB1 as below If the resistance is or less than 1 kW short circuit occurs on the main circuit 09 12 class terminal of the tester in case of digital termin...

Page 134: ...the connector press the protrusion on the connector Follow the procedure below to measure resistance between the terminals of the DB1 and the terminals of the compressor with a multi tester Evaluate t...

Page 135: ...3 Removal of Horizontal Blades Vertical Blades 155 2 4 Removal of Electrical Box PCBs Swing Motors 157 2 5 Removal of Indoor Heat Exchanger 162 2 6 Removal of Fan Motor Fan Rotor 165 3 Outdoor Unit 0...

Page 136: ...onfirm the signal reception When the ON OFF button is kept pressed for 5 seconds the forced cooling operation is performed for about 15 minutes 2 Remove the air filters 1 Open the front panel to the p...

Page 137: ...the air filter and unfastening the projections from the air filter frame 3 Remove the Titanium apatite photocatalytic air purifying filter from its frame at 5 positions by bending it To prevent the d...

Page 138: ...aft while bending the horizontal blade slightly The center shaft can be released easily by bending the blade Cautions for reassembling 1 Since the key pattern hook is provided rotate the horizontal bl...

Page 139: ...SiUS041111 Indoor Unit 09 12 Class Removal Procedure 131 5 Remove the horizontal blade Step Procedure Points R11626...

Page 140: ...panel over the position where it stops 2 Release the right rotary shaft The rotary shaft on each side can be released easily by sliding each shaft inwards 3 Release the left rotary shaft 4 Remove the...

Page 141: ...lle has 3 hooks on the upper part Refer to the removal procedure in a reverse way when reassembling 3 Press each hook and also lift the grille up to unfasten the hooks 4 Pull the upper part of the fro...

Page 142: ...s 1 Disconnect the connecting wires Preparation Remove the front grille according to the Removal of Front Grille 1 Remove the screw of the service cover 2 Pull out the service cover down in the direct...

Page 143: ...hite 2 power supply red 3 transmission yellow green ground 6 Pull out the indoor heat exchanger thermistor Take care not to lose the clip of thermistor 2 Remove the electrical box 1 Remove the screw a...

Page 144: ...emove the screw of the electrical box 4 Slide the electrical box to the right first and detach the horizontal blade from the electrical box 5 Pull the electrical box There is a hook on the bottom fram...

Page 145: ...ooks at the bottom Remove the fan guard Repeat the same procedure to remove the fan guard on the other side 3 Unfasten the hooks at the upper 2 positions A vertical blade assembly has 6 fins It is imp...

Page 146: ...ure 4 Unfasten the 3 hooks at the shaft mounting part by pressing them with a flat screwdriver 5 Remove the vertical blade assembly Repeat the same procedure to remove the vertical blade assembly on t...

Page 147: ...ocedure Points 1 Remove the shield plate 2 Preparation Remove the electrical box according to the Removal of Electrical Box Vertical Blades 1 Unfasten the hooks at the upper 2 positions of the shield...

Page 148: ...wing motor has a hook Press the hook with a flat screwdriver to unfasten it 3 Remove the display PCB 1 Unfasten the hook and release the display PCB assembly 2 Turn over the display PCB assembly and u...

Page 149: ...he display PCB S27 for control PCB 4 Remove the control PCB 1 Lift the shield plate 1 and unfasten the 2 hooks 2 Slide the shield plate 1 and remove it 3 Release the harnesses from the hooks Step Proc...

Page 150: ...een with sleeve lower 5 Release the 4 hooks Lift up the upper part of the control PCB and remove it 6 The figure shows the control PCB Refer to page 13 for detail S6 swing motor S26 display PCB S32 in...

Page 151: ...opened air may be sucked in to generate an over pressure in refrigeration cycle thus resulting in pipe rupture or accidental injury If the drain hose is embedded in the wall disconnect the drain hose...

Page 152: ...uid piping with 2 wrenches 2 Remove the indoor heat exchanger 1 Remove the indoor unit from the installation plate 2 Unfasten the hook of the piping fixture on the back of the indoor unit Step Procedu...

Page 153: ...indoor heat exchanger be sure to wear gloves or wrap it with cloth before proceeding to work or you could be injured by the fins 5 Push and unfasten the hook on the right side and lift up the indoor...

Page 154: ...er turning off all power supplies before disassembling work Step Procedure Points 1 Remove the right side panel Preparation Remove the indoor heat exchanger according to the Removal of Indoor Heat Exc...

Page 155: ...rotor and the fan motor 1 The fan motor has 3 projections on the right side The fan rotor has a rotating shaft on the left side 2 Remove the fan rotor 3 Press the bearing from outside 4 Remove the be...

Page 156: ...l out the fan motor from the fan rotor to remove The magnet of the fan motor is united with the fan rotor Be careful not to attract metal waste to the magnet Keep away from the materials that can be a...

Page 157: ...ed at the left side with pliers and insert the removed drain plug into the right side with a hexagonal wrench 1 8 4 mm 3 Insert the drain hose to the left side and tighten it with the heat insulation...

Page 158: ...e signal reception When the ON OFF button is kept pressed for 5 seconds the forced cooling operation is performed for about 15 minutes 1 Remove the air filters 1 Open the front panel to the position w...

Page 159: ...urifying filters 1 Push up the bottom of the Titanium apatite photocatalytic air purifying filter to unfasten the hooks 2 on lower 3 on upper and take the filter out The right and left filters are int...

Page 160: ...he front panel further than it stops release both the shafts and remove the front panel Slide the front panel from side to side to release each shaft When reassembling the front panel fit the right an...

Page 161: ...cedure Points 1 Remove the service cover Preparation Remove the front panel according to Removal of the Air Filters Front Panel You can remove the front grille without detaching the service cover 1 Re...

Page 162: ...ront grille The convex marks on the front panel indicate the position of the hooks 3 Pull the upper part of the front grille out and lift the lower part up and then remove the front grille Make sure t...

Page 163: ...al blades 2 Bend the horizontal blade slightly and release the center shaft 2 locations Remove both the horizontal blades upper and lower in the same way 3 Release the left shaft 4 Slide the horizonta...

Page 164: ...n guards beforehand The unit has 3 sets of vertical blades linked one another with interlock rods 1 Release the right and left shafts 2 Unfasten the 3 hooks for each set of vertical blades 3 Pull the...

Page 165: ...Remove the electrical box Preparation Remove the front grille according to the Removal of Front Grille 1 Remove the screw and remove the drip proof plate 2 Cut the clamp 3 4 5 Pull out the indoor heat...

Page 166: ...move the electrical box without detaching the terminal board Screw M4 30 7 Disconnect the connector for the fan motor S1 8 Disconnect the connector for the swing motor S6 S6 for horizontal blades 9 Re...

Page 167: ...trical box has a hook on its back 11 Pull the electrical box out Catch the back hook of the electrical box when reassembling 2 Remove the PCBs 1 Remove the screw on the electrical box Screw M4 16 2 Pu...

Page 168: ...sten the hooks on the lower side 4 Cut the clamp 5 The signal receiver unit has 3 PCBs Unfasten the hooks and remove each PCB Disconnect every connector from each PCB Remove the signal receiver unit w...

Page 169: ...C fan motor S6 swing motor for horizontal blades S26 buzzer PCB S28 signal receiver PCB S32 indoor heat exchanger thermistor Refer to page 15 for detail 3 Remove the swing motor for horizontal blades...

Page 170: ...nnecting the refrigerant pipe If the refrigerant pipe is disconnected with the compressor operating and the stop valve open air may be sucked in and may generate an over pressure in refrigeration cycl...

Page 171: ...the indoor unit from the installation plate 3 Remove the indoor heat exchanger 1 Unfasten the hook of the piping fixture at the back of the indoor unit and pull out the piping 2 Widen the auxiliary pi...

Page 172: ...exchanger be sure to wear protective gloves or wrap the indoor heat exchanger with cloths or you may be injured by the fins 4 Push the hooks on the right side and unfasten them 5 Pull the indoor heat...

Page 173: ...disassembling work Step Procedure Points 1 Remove the right side plate 1 Remove the 2 screws You can remove the fan rotor without detaching the right side plate 2 Lift the right side plate and remove...

Page 174: ...tops Then give the screw one more turn 3 Rotate the fan rotor and confirm the fan motor and the fan rotor are installed appropriately 4 Tighten the screw completely if appropriate 5 If not appropriate...

Page 175: ...t for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Appearance features Take care not to cut your finger by the fins of the outdoor heat exc...

Page 176: ...screws right 1 screw left 2 screws and remove the top panel 3 Remove the 5 screws of the front panel 4 Lift up the left side and unfasten the hooks 5 Release the right side hooks and remove the front...

Page 177: ...Remove the 4 screws of the discharge grille Unfasten the 6 hooks and remove the discharge grille 3 Remove the shield plate and the conduit 1 Remove the 2 screws 2 Remove the shield plate Step Procedu...

Page 178: ...or Unit 09 12 Class SiUS041111 170 Removal Procedure 3 Remove the 2 screws 4 Remove the conduit 5 Remove the conduit mounting plate Step Procedure Points R11751 Conduit R11752 Conduit mounting plate R...

Page 179: ...e outdoor fan Preparation Remove the panels according to the Removal of Outer Panels Nut size M6 1 2 Remove the nut of the outdoor fan Remove the outdoor fan When reassembling align mark of the outdoo...

Page 180: ...eassembling put the fan motor lead wire through the back of the fan motor so as not to be entangled with the outdoor fan 4 Release the fan motor lead wire from the hooks 5 Remove the 3 screws and remo...

Page 181: ...all power supplies before disassembling work Step Procedure Points 1 Remove the right side panel Preparation Remove the panels according to the Removal of Outer Panels 1 Release the outdoor temperatur...

Page 182: ...dure 3 Remove the 4 screws on the right side panel 4 Unfasten the hook on the rear side When reassembling make sure to fit the hook 5 Unfasten the hook and remove the right side panel Step Procedure P...

Page 183: ...thermistor up to the dent of fixture 1 Release the discharge pipe thermistor 2 Release the outdoor heat exchanger thermistor 3 Lift the hook with a flat screwdriver and remove the electronic componen...

Page 184: ...t the clamp 5 Release the harnesses 6 Disconnect the connector for the thermistors S90 S90 outdoor temperature thermistor outdoor heat exchanger thermistor discharge pipe thermistor 7 Remove the therm...

Page 185: ...Disconnect the connector for the overload protector S40 2 Disconnect the connector for the four way valve coil S80 The cooling only model has no harness for S80 3 Disconnect the connector for the ele...

Page 186: ...connector for the compressor motor 5 Release the harnesses from the hook 6 Unfasten the hook of the electrical box from the partition plate with a flat screwdriver The electrical box can be removed b...

Page 187: ...remove the electrical box 4 Remove the control PCB 1 Disconnect the 2 terminals of the reactor 2 Remove the screw of the terminal board and pull out the terminals Step Procedure Points R11776 Electri...

Page 188: ...ass SiUS041111 180 Removal Procedure 3 Cut the clamp 4 Remove the 3 screws and remove the reactor 5 Disconnect the 3 connectors for the filter PCB S10 HN3 HL3 Step Procedure Points R11780 Reactor R117...

Page 189: ...11 Outdoor Unit 09 12 Class Removal Procedure 181 6 Release the harnesses 7 Remove the 6 screws 8 Unfasten the 2 hooks 9 Lift and remove the control PCB Step Procedure Points R11782 Control PCB R10717...

Page 190: ...HL3 filter PCB S20 electronic expansion valve coil S40 overload protector S70 fan motor S80 four way valve coil S90 thermistors 5 Remove the filter PCB 1 Remove the screw of the ground 2 Cut the clam...

Page 191: ...SiUS041111 Outdoor Unit 09 12 Class Removal Procedure 183 3 Release the harnesses from the hook 4 Remove the screw Step Procedure Points R11787 R11788...

Page 192: ...Outdoor Unit 09 12 Class SiUS041111 184 Removal Procedure 5 Unfasten the 2 hooks 6 Release the harnesses 7 Remove the filter PCB Step Procedure Points R11789 R11790 R11791 Filter PCB...

Page 193: ...or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the partition plate 1 Remove the 2 screws 2 The partition plate has a hook on the lower side Lift...

Page 194: ...blanket carefully 1 Lift and remove the sound blanket top 2 Pull the sound blanket outer and inner 2 out 3 Pull the sound blanket inner 1 out Since the piping ports on the sound blanket are torn easi...

Page 195: ...s before disassembling work Step Procedure Points 1 Remove the peripheries The cooling only model has no four way valve coil 1 Remove the screw and remove the four way valve coil 2 Remove the terminal...

Page 196: ...Outdoor Unit 09 12 Class SiUS041111 188 Removal Procedure 5 Remove the electronic expansion valve coil 6 Remove the putty Step Procedure Points R11798 Electronic expansion valve coil R11800...

Page 197: ...four way valve and the deterioration of the gaskets affected by heat Keep below 120 C 248 F by wrapping the four way valve with a wet cloth and provide water so that the cloth does not dry In case of...

Page 198: ...inside the four way valve and the deterioration of the gaskets affected by heat Keep below 120 C 248 F by wrapping the four way valve with a wet cloth and provide water so that the cloth does not dry...

Page 199: ...more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the 3 screws and lift the top panel Take care not to cut your finger by the fins of the outdoor heat...

Page 200: ...edure 4 Unfasten the right side hooks 5 Unfasten the left side hooks Remove the front panel When reassembling fit the left side of the front panel first 6 Remove the screw of the stop valve cover Step...

Page 201: ...SiUS041111 Outdoor Unit 15 18 24 Class Removal Procedure 193 7 Pull down the stop valve cover to unfasten the hooks and remove it The stop valve cover has 5 hooks Step Procedure Points R14704 R14705...

Page 202: ...off all power supplies before disassembling work Step Procedure Points 1 Remove the shield plate Preparation Remove the top panel and the front panel according to the Removal of Outer Panels This proc...

Page 203: ...groove and the 2 hooks of the partition plate The harnesses of S70 and S20 cross each other 5 Remove the nut of the outdoor fan Nut size M6 When reassembling align mark of the outdoor fan with D cut s...

Page 204: ...val Procedure 6 Remove the screw of the fan motor fixing frame 7 Pull down the fan motor fixing frame to unfasten the 2 hooks at the bottom 8 Remove the fan motor fixing frame Step Procedure Points R1...

Page 205: ...1111 Outdoor Unit 15 18 24 Class Removal Procedure 197 9 Open the hook and release the fan motor lead wire 10 Remove the 4 screws and remove the fan motor Step Procedure Points R14296 Hook Fan motor R...

Page 206: ...work Step Procedure Points 1 Remove the 2 screws of the protection plate When reassembling pass the connecting wires through the conduit and secure them with a lock nut 2 Remove the protection plate 3...

Page 207: ...rocedure 199 5 Remove the screws and remove the connecting wires 6 Pull out the outdoor temperature thermistor 7 Remove the 6 screws of the right side panel Step Procedure Points R14299 R14300 Outdoor...

Page 208: ...ks and the 1 upper hook Remove the right side panel When reassembling insert the 2 lower hooks and the 1 upper hook of the back 9 Cut the clamp 10 Pull out the outdoor heat exchanger thermistor Step P...

Page 209: ...cedure 201 11 Peel off the filament tape 12 Disconnect the connector for the fan motor S70 13 Disconnect the connector for the four way valve coil S80 The cooling only models have no harness for S80 S...

Page 210: ...1111 202 Removal Procedure 14 Pull out the clamp 15 Disconnect the connector for the electronic expansion valve coil S20 16 Pull out the clamp 17 Remove the wire saddle Step Procedure Points R14309 R1...

Page 211: ...ct the connectors in the following order 1 S40 2 S20 3 S80 4 S70 19 Pull out the clamp The compressor harness has a clamp When reassembling insert the clamp as below 20 Disconnect the relay connector...

Page 212: ...rocedure 22 Disconnect the connector for the thermistors S90 23 Pull out the clamp When reassembling insert the clamp as below 24 Remove the wire saddle 25 Pull out the clamp Step Procedure Points R14...

Page 213: ...e 205 26 Remove the screw 27 Pull out the 2 clamps at the bottom of the electrical box When reassembling insert the 2 clamps of the thermistor assembly into the holes as below 28 Remove the electrical...

Page 214: ...off all power supplies before disassembling work Step Procedure Points 1 Remove the main PCB S12 for HL4 HN4 on filter PCB 1 Disconnect the connector S12 and pull out the clamp 2 Disconnect the conne...

Page 215: ...5 18 24 Class Removal Procedure 207 4 Pull out the clamp When reassembling insert the clamp as below 5 Remove the 2 upper screws 6 Remove the 1 lower screw Step Procedure Points R14325 HL2 blue HN2 wh...

Page 216: ...or Unit 15 18 24 Class SiUS041111 208 Removal Procedure 7 Lift the main PCB assembly 8 Unfasten the 4 hooks at the bottom 9 Remove the 8 screws Step Procedure Points R14328 Main PCB Assembly R14329 R1...

Page 217: ...PCB S20 electronic expansion valve coil S40 overload protector S70 fan motor S80 four way valve coil S90 thermistors HL3 HN3 filter PCB 2 Remove the radiation fin 1 Remove the 2 screws on the bottom o...

Page 218: ...3 Remove the filter PCB 1 Remove the ground screw 2 Pull out the terminals from the terminal board 1 black 2 white 3 red 3 Pull out the clamp 4 Release the harnesses from the groove Step Procedure Po...

Page 219: ...US041111 Outdoor Unit 15 18 24 Class Removal Procedure 211 5 Remove the 2 screws 6 Unfasten the 3 hooks of the filter PCB assembly 7 Remove the 1 screw Step Procedure Points R14365 R14366 R14367 R1436...

Page 220: ...Outdoor Unit 15 18 24 Class SiUS041111 212 Removal Procedure 8 Unfasten the 2 hooks 9 Remove the filter PCB Refer to page 19 for detail Step Procedure Points R14369 R14370...

Page 221: ...t for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the partition plate 1 Remove the 2 screws 2 Pull out the clamp from the partition...

Page 222: ...ound blanket carefully Be careful not to lose the clip for the thermistor 1 Release the discharge pipe temperature thermistor 2 Remove the sound blanket top upper 3 Remove the sound blanket top lower...

Page 223: ...Outdoor Unit 15 18 24 Class Removal Procedure 215 4 Remove the sound blanket side outer 5 Remove the sound blanket side inner Step Procedure Points R14347 Sound blanket side outer R14348 Sound blanket...

Page 224: ...r so that the cloth does not dry Keep below 120 C 248 F Warning Be careful not to burn yourself burnt with pipes and other parts that are heated by the gas brazing machine Warning If the refrigerant g...

Page 225: ...mosphere Make sure to collect all the refrigerant gas Cautions for restoration 1 Restore the piping by non oxidation brazing 2 It is required to prevent the carbonization of the oil inside the four wa...

Page 226: ...t for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the terminal cover 2 Disconnect the compressor lead wires and the overload protec...

Page 227: ...steel plate so that the brazing flame cannot influence peripheries Be careful not to burn the compressor terminals the name plate or the heat exchanger fin Before working make sure that the refrigera...

Page 228: ...g Operation 222 3 Trial Operation 223 4 Field Settings 224 4 1 Model Type Setting 224 4 2 Temperature Display Switch 224 4 3 When 2 Units are Installed in 1 Room 225 4 4 Facility Setting Switch coolin...

Page 229: ...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 Afte...

Page 230: ...ration ON OFF button SW1 on the indoor unit for 5 seconds 2 Press the forced cooling operation ON OFF switch SW1 on the outdoor unit 15 18 24 class only Command frequency 58 Hz 09 12 class 30 Hz 15 18...

Page 231: ...restarts operation with the previous mode when the circuit breaker is restored In cooling mode select the lowest programmable temperature in heating mode select the highest programmable temperature Tr...

Page 232: ...o set the heat pump model or cooling only model Make the setting as shown in the illustration The factory set is the heat pump side Heat pump model Set the DIP switch to H P Cooling only model Set the...

Page 233: ...emote controller can be set for different addresses Both the indoor unit PCB and the wireless remote controller need alteration Indoor Unit PCB Cut the address setting jumper JA on the control PCB Wir...

Page 234: ...to maintain the pressure difference When the pressure difference returns to high again the fan starts to rotate again 09 12 class 15 18 24 class Caution 1 If the outdoor unit is installed where the ou...

Page 235: ...ion 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 Remote controller setting...

Page 236: ...of the power transistor and the diode bridge Applying the paste should be implemented in accordance with the following instruction NOTE There is the possibility of failure with smoke in case of bad h...

Page 237: ...SiUS041111 Appendix 229 Part 9 Appendix 1 Piping Diagrams 230 1 1 Indoor unit 230 1 2 Outdoor Unit 231 2 Wiring Diagrams 233 2 1 Indoor Unit 233 2 2 Outdoor Unit 234...

Page 238: ...6CuT 9 32CuT 9 32CuT 9 32CuT CROSS FLOW FAN FIELD PIPING 1 4CuT M FAN MOTOR 3 8CuT FIELD PIPING 3 8CuT REFRIGERANT FLOW COOLING HEATING THERMISTOR ON HEAT EXCH 4D066211A INDOOR UNIT 5 16CuT HEAT EXCHA...

Page 239: ...16CuT 16 0 5 8CuT 5 16CuT 12 0 15 32CuT CAPILLARY TUBE 1 5 16CuT 5 16CuT 5 32CuT 8 0 4 0 5 16CuT CAPILLARY TUBE 2 6 0 6 0 REFRIGERANT FLOW 5 16CuT 5 32CuT 5 16CuT 1 4CuT 1 4CuT COOLING 8 0 4 0 CAPILLA...

Page 240: ...EAT EXCHANGER 5 16CuT 5 16CuT 16 0 5 8CuT 5 16CuT 12 0 15 32CuT CAPILLARY TUBE 1 5 16CuT 5 32CuT 5 16CuT 4 0 8 0 5 16CuT CAPILLARY TUBE 2 6 0 6 0 REFRIGERANT FLOW 5 32CuT 5 16CuT 5 16CuT 1 4CuT 1 4CuT...

Page 241: ...THEN BACK ON AGAIN FRAME GROUND FUSE HARNESS PILOT LAMP FAN MOTOR SWING MOTOR PRINTED CIRCUIT BOARD THERMISTOR CONNECTOR OPERATION SWITCH TERMINAL STRIP PROTECTIVE GROUND C 3D065939B FG F1U H1 H3 H1P...

Page 242: ...indoor MRM20 N 5 FU3 Z3C X1M DB1 L804 HL3 HL2 30A HL1 BLU 1 L1 BLK 1 MRM10 HN1 V2 WHT 2 L2 2 HN3 HN2 S C8 C7 WHT RED 3 3 1 V3 BLK 1 BLK FU1 L1 BLK 3 15A BLK L2 BLK PCB2 S11 S10 BLK DC_N1 DC_P1 N 4 GRN...

Page 243: ......

Page 244: ...actured for export to numerous countries throughout the world Daikin Industries Ltd does not have control over which products are exported to and used in a particular country Prior to purchase please...

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