Daikin FDMQ12RVJU Service Manual Download

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SiUS091601EA

Troubleshooting for FTX, FVXS Series

Part 6 Service Diagnosis

132

Reference

5.4 Thermistor or Related Abnormality

Error Code

Method of Error
Detection

The temperatures detected by the thermistors determine thermistor errors.

Error Decision
Conditions

The voltage between the both ends of the thermistor is either 4.96 V or more, or 0.04 V or less with
the power on.

Supposed
Causes



Disconnection of connector



Defective thermistor(s)



Defective indoor unit PCB

Troubleshooting

: Indoor heat exchanger thermistor

: Room temperature thermistor

Check No.01

Refer to P.181

YES

(R21870)

Check No. 01

Check the thermistor resistance
value.

YES

Caution

Correct the connection.

Replace the defective
thermistor(s).

Replace the indoor unit PCB
(control PCB).

Normal?

Check the connection of
connectors.

Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.

Summary of Contents for FDMQ12RVJU

Page 1: ... Applied Models Inverter Pair Heat Pump Service Manual SiUS091601EA Inverter Pair Wall Mounted Type FTX N U Series Floor Standing Type FVXS V Series Duct Connected Type FDMQ R Series ...

Page 2: ... 12 15NVJU 28 1 5 FDMQ12 18 24RVJU 30 2 Wireless Remote Controller Receiver 32 2 1 BRC082A43 32 3 Wired Remote Controller 33 3 1 BRC1E73 33 4 Outdoor Unit 34 4 1 RXL09QMVJU 34 4 2 RXL12QMVJU 9 36 4 3 RXL15QMVJU 38 4 4 RXL18 24UMVJU 39 5 Optional Adaptor 42 5 1 BRP072A43 Wireless LAN Adaptor 42 5 2 KRP067A41 KRP980B2 Remote Control PC board Set 42 Part 4 Functions and Control 43 1 Common Functions ...

Page 3: ...tions 77 5 Control Specification 78 5 1 Mode Hierarchy 78 5 2 Frequency Control 78 5 3 Controls at Mode Changing Start up 80 5 4 Discharge Pipe Temperature Control 82 5 5 Input Current Control 83 5 6 Freeze up Protection Control 84 5 7 Heating Peak cut Control 84 5 8 Outdoor Fan Control 85 5 9 Liquid Compression Protection Function 85 5 10 Defrost Control 86 5 11 Electronic Expansion Valve Control...

Page 4: ...on or Over voltage Detection 146 6 9 Signal Transmission Error Between Indoor and Outdoor Unit 148 6 10 Signal Transmission Error Between Indoor Unit and Remote Controller 150 6 11 Signal Transmission Error Between MAIN SUB Remote Controllers 151 6 12 Mismatching of Indoor Unit and Outdoor Unit 152 7 Troubleshooting for Outdoor Unit 153 7 1 Outdoor Unit PCB Abnormality 153 7 2 OL Activation Compre...

Page 5: ...ion 199 3 Trial Operation 202 4 Field Settings for FTX FVXS Series 206 4 1 Temperature Display Switch 206 4 2 When 2 Units are Installed in 1 Room 207 4 3 Jumper and Switch Settings 209 5 Field Settings for FDMQ Series 210 5 1 How to Change the Field Settings 210 5 2 Overview of Field Settings 213 5 3 MAIN SUB and Address Setting for Wireless Remote Controller 214 6 Field Settings for Outdoor Unit...

Page 6: ...US091601EA 1 Introduction 1 Safety Cautions 2 1 1 Warnings and Cautions Regarding Safety of Workers 2 1 2 Warnings and Cautions Regarding Safety of Users 4 2 Icons Used 7 3 Revision History 8 Introduction ...

Page 7: ...struction is shown in the illustration or near the symbol 1 1 Warnings and Cautions Regarding Safety of Workers This manual is for the person in charge of maintenance and inspection Warning Do not store equipment in a room with fire sources e g naked flames gas appliances electric heaters Be sure to disconnect the power cable from the socket before disassembling equipment for repair Working on equ...

Page 8: ...ant The use of materials for R 22 refrigerant models may cause a serious accident such as a damage of refrigerant cycle or equipment failure Do not mix air or gas other than the specified refrigerant R 32 R 410A R 22 in the refrigerant system If air enters the refrigerant system an excessively high pressure results causing equipment damage and injury Caution Do not repair electrical components wit...

Page 9: ...the same power outlet with other electrical appliances since it may cause an electrical shock excessive heat generation or fire Be sure to use an exclusive power circuit for the equipment and follow the local technical standards related to the electrical equipment the internal wiring regulations and the instruction manual for installation when conducting electrical work Insufficient power circuit ...

Page 10: ...k to make sure that the power cable plug is not dirty or loose then insert the plug into a power outlet securely If the plug is dusty or has a loose connection it may cause an electrical shock or fire When replacing the coin battery in the remote controller be sure to dispose of the old battery to prevent children from swallowing it If a child swallows the coin battery see a doctor immediately Cau...

Page 11: ...tance is 1 M or higher Faulty insulation may cause an electrical shock Be sure to check the drainage of the indoor unit after the repair Faulty drainage may cause water to enter the room and wet the furniture and floor Do not tilt the unit when removing it The water inside the unit may spill and wet the furniture and floor Caution ...

Page 12: ...ution is used when there is danger that the reader through incorrect manipulation may damage equipment lose data get an unexpected result or have to restart part of a procedure Note Note Note provides information that is not indispensable but may nevertheless be valuable to the reader such as tips and tricks Reference Reference Reference guides the reader to other places in this binder or in this ...

Page 13: ... Revision History Introduction 8 3 Revision History Month Year Version Revised contents 02 2016 SiUS091601E First edition 10 2019 SiUS091601EA Model addition FTX18 24UVJU FDMQ12 18 24RVJU RXL12QMVJU9 RXL18 24UMVJU ...

Page 14: ...SiUS091601EA 9 Part 1 General Information 1 Applicable Models 10 2 Functions 11 Part 1 General Information ...

Page 15: ... Information 10 1 Applicable Models Indoor Unit Outdoor Unit FTX09NMVJU FTX12NMVJU FTX15NMVJU FTX18UVJU FTX24UVJU FVXS09NVJU FVXS12NVJU FVXS15NVJU FDMQ12RVJU FDMQ18RVJU FDMQ24RVJU RXL09QMVJU RXL12QMVJU RXL12QMVJU9 RXL15QMVJU RXL18UMVJU RXL24UMVJU ...

Page 16: ...IGENT EYE operation auto energy saving 2 selectable temperature sensors Quick warming function Hot start function Automatic defrosting Operation Automatic cooling heating changeover Program dry operation Fan only Lifestyle Convenience Inverter POWERFUL operation ECONO operation Indoor unit ON OFF switch Emergency operation switch Signal receiving sign 2 Health and Cleanliness Titanium apatite deod...

Page 17: ...ither side drain right or left Low temperature cooling operation 4 F 3 20 C 4 F 3 20 C 4 F 3 20 C 4 F 3 20 C 4 F 3 20 C 4 F 3 20 C 4 F 3 20 C F C changeover R C temperature display factory setting F F only Available 1 Not available with RXL12QMVJU9 Not available 2 Receiving sound only 3 Below 50 F 10 C Below 14 F 10 C Needs setting on outdoor unit 09 12 15 class cutting jumper on the main PCB 18 2...

Page 18: ...SiUS091601EA 13 Part 2 Specifications 1 Specifications 14 Part 2 Specifications ...

Page 19: ... 9 52 3 51 8 53 2 53 9 53 8 52 9 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D in mm 11 1 4 30 5 16 8 3 4 285 770 223 11 1 4 30 5 16 8 3 4 285 770 223 Packaged Dimensions H W D in mm 14 3 16 32 11 16 12 360 831 305 14 3 16 32 11 16 12 360 831 305 Weight Mass Lbs kg 18 8 18 8 Gross Weight Gross Mass Lbs kg 24 11 25 12 Sound Pressure Level H M L SL dB A 43 36 30 19...

Page 20: ...0 68 3 73 1 71 8 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D in mm 11 1 4 30 5 16 8 3 4 285 770 223 11 5 8 39 10 3 8 295 990 263 Packaged Dimensions H W D in mm 14 3 16 32 11 16 12 360 831 305 14 9 16 42 1 2 15 3 8 370 1 080 390 Weight Mass Lbs kg 18 8 27 12 Gross Weight Gross Mass Lbs kg 25 12 37 17 Sound Pressure Level H M L SL dB A 45 37 30 19 45 37 30 26 45...

Page 21: ...3 15 33 15 Gross Weight Gross Mass Lbs kg 42 19 44 20 Sound Pressure Level H M L SL dB A 46 41 36 33 48 42 35 32 51 44 37 34 48 42 37 34 Outdoor Unit RXL18UMVJU RXL24UMVJU Casing Color Ivory White Ivory White Heat Exchanger Fin Spec Tube Waffle Fin PE 7 mm Hi XD Tube Waffle Fin PE 7 mm Hi XD Tube Compressor Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Model 2YC63AAXD 2YC63AAX...

Page 22: ...1 5 50 2 54 5 52 8 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D in mm 23 5 8 27 9 16 8 1 4 600 700 210 23 5 8 27 9 16 8 1 4 600 700 210 Packaged Dimensions H W D in mm 27 3 8 30 15 16 11 696 786 280 27 3 8 30 15 16 11 696 786 280 Weight Mass Lbs kg 31 14 31 14 Gross Weight Gross Mass Lbs kg 40 18 40 18 Sound Pressure Level H M L SL dB A 38 32 26 23 38 32 26 23 3...

Page 23: ...9 1 77 8 77 8 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D in mm 23 5 8 27 9 16 8 1 4 600 700 210 23 5 8 27 9 16 8 1 4 600 700 210 Packaged Dimensions H W D in mm 27 3 8 30 15 16 11 696 786 280 27 3 8 30 15 16 11 696 786 280 Weight Mass Lbs kg 31 14 31 14 Gross Weight Gross Mass Lbs kg 40 18 40 18 Sound Pressure Level H M L SL dB A 39 33 27 24 39 33 27 24 44 40 ...

Page 24: ...6 28 5 2 418 68 5 2 361 66 9 Sound Pressure Level dB A 50 50 54 55 Sound Power Level dB A 62 62 66 67 Weight Mass Gross Weight Gross Mass Lbs kg 70 32 80 36 130 59 137 62 Piping Connections Liquid in mm 1 4 6 4 Flare 1 4 6 4 Flare Gas in mm 3 8 9 5 Flare 1 2 12 7 Flare Drain in mm I D 5 8 16 I D 5 8 16 Safety Devices Fuse Fuse Max Interunit Piping Length ft m 65 5 8 20 98 1 2 30 Max Interunit Heig...

Page 25: ... 2YC63AAXD Type Hermetically Sealed Swing Type Motor Output W 1 920 Fan Type Motor Output W Propeller 76 Airflow Rate cfm m min 2 418 68 5 2 361 66 9 Sound Pressure Level dB A 55 55 Sound Power Level dB A 67 67 Weight Mass Gross Weight Gross Mass Lbs kg 130 59 137 62 Piping Connections Liquid in mm 1 4 6 4 Flare Gas in mm 5 8 15 9 Flare Drain in mm I D 5 8 16 Safety Devices Fuse Max Interunit Pipi...

Page 26: ...12 18 24RVJU 30 2 Wireless Remote Controller Receiver 32 2 1 BRC082A43 32 3 Wired Remote Controller 33 3 1 BRC1E73 33 4 Outdoor Unit 34 4 1 RXL09QMVJU 34 4 2 RXL12QMVJU 9 36 4 3 RXL15QMVJU 38 4 4 RXL18 24UMVJU 39 5 Optional Adaptor 42 5 1 BRP072A43 Wireless LAN Adaptor 42 5 2 KRP067A41 KRP980B2 Remote Control PC board Set 42 Part 3 Printed Circuit Board Connector Wiring Diagram ...

Page 27: ...for swing motor horizontal blade 2 S26 Connector for display signal receiver PCB PCB2 3 S32 Connector for indoor heat exchanger thermistor R2T 4 S200 Connector for DC fan motor 5 S403 Connector for adaptor PCB option 6 H1 H2 H3 FG Connector for terminal strip 7 FU1 Fuse 3 15 A 250 V 8 V2 Varistor FG S32 S26 H3 H2 H1 S6 S200 2P399175 9 FU1 V2 S403 ...

Page 28: ...he appropriate wiring diagram 1 S27 Connector for control PCB PCB1 2 SW1 S1W Indoor unit ON OFF switch Forced cooling operation ON OFF switch Refer to page 199 for details of forced cooling operation 3 LED1 H1P LED for operation green 4 LED2 H2P LED for timer yellow 5 RTH1 R1T Room temperature thermistor S27 SW1 LED2 LED1 RTH1 3P185701 4 Solder side LED3 is not mounted ...

Page 29: ...PCB2 1 S6 Connector for swing motor horizontal blade 2 S26 Connector for display signal receiver PCB PCB3 3 S32 Connector for indoor heat exchanger thermistor R2T 4 S200 Connector for DC fan motor 5 S403 Connector for adaptor PCB option 6 S900 Connector for filter PCB PCB1 S26 S900 3P380931 1 S6 S32 S200 S403 ...

Page 30: ...or for control PCB PCB2 3 FG HE Connector for ground 4 FU1 Fuse 3 15 A 250 V 5 V2 Varistor 3P380932 1 FG S800 V2 HE S100 FU1 1 S27 Connector for control PCB PCB2 2 SW1 S1W Indoor unit ON OFF switch Forced cooling operation ON OFF switch Refer to page 199 for details of forced cooling operation 3 LED1 H1P LED for operation green 4 LED2 H2P LED for timer yellow 5 RTH1 R1T Room temperature thermistor...

Page 31: ...ector for INTELLIGENT EYE sensor PCB PCB4 4 S32 Indoor heat exchanger thermistor R2T 5 S41 Connector for swing motors 6 S46 Connector for display PCB PCB3 7 S47 Connector for signal receiver PCB PCB2 8 H1 H2 H3 FG Connector for terminal strip 9 JA Address setting jumper Refer to page 207 for details 10 JB Fan speed setting when compressor stops for thermostat OFF Refer to page 209 for details 11 J...

Page 32: ...onnector for control PCB PCB1 3P224121 1 S48 1 S49 Connector for control PCB PCB1 2 SW1 Indoor unit ON OFF switch Forced cooling operation ON OFF switch Refer to page 199 for details of forced cooling operation 3 LED1 H1P LED for operation green 4 LED2 H2P LED for timer yellow 5 LED3 H3P LED for INTELLIGENT EYE green 6 RTH1 R1T Room temperature thermistor 3P224121 1 RTH1 SW1 LED3 LED2 LED1 S49 1 S...

Page 33: ... S32 Indoor heat exchanger thermistor R2T 5 S41 Connector for lower air outlet motor 6 S42 Connector for swing motor 7 S46 Connector for display signal receiver PCB PCB4 8 S48 Connector for sensor PCB PCB1 9 H1 H2 H3 Connector for terminal strip 10 E1 Terminal for ground wire 11 JA Address setting jumper Refer to page 207 for details 12 JB Fan speed setting when compressor stops for thermostat OFF...

Page 34: ...RTH2 3P191450 1 1 S27 Connector for control PCB PCB2 2 SW2 S2W 4 Switch for upward airflow limit setting Refer to page 209 for details Keep the other switches as factory setting 3 SW4 S4W Switch for airflow selection Refer to page 46 for details S27 SW4 SW2 4 3P191448 1 1 S47 Connector for control PCB PCB2 2 SW1 S1W Indoor unit ON OFF switch Forced cooling operation ON OFF switch Refer to page 199...

Page 35: ...T 4 X25A Connector for drain pump motor 5 X27A Connector for terminal block for power supply 6 X28A Connector for power supply wiring option 7 X30A Connector for terminal block for wired remote controller 8 X33A Connector for wiring option 9 X35A Connector for wiring adaptor option 10 X70A Connector for indoor fan PCB A2P 11 F1U Fuse 3 15 A 250 V 12 HAP LED for service monitor green 13 DS1 DIP swi...

Page 36: ...n PCB A2P 1 X3A Connector for control PCB A1P 2 X6A Connector for reactor 3 X8A Connector for DC fan motor 4 X10A Connector for terminal block for power supply 5 F2U Fuse 5 A 250 V 6 F4U Fuse 6 3 A 250 V 7 HAP LED for service monitor green 2P442228 16 2P442228 17 F2U X8A X3A X10A F4U X6A HAP ...

Page 37: ...Wiring Diagram 32 2 Wireless Remote Controller Receiver 2 1 BRC082A43 Wired Remote Controller PCB 1 SS1 MAIN SUB setting switch Refer to page 214 for details 2 SS2 Address setting switch Refer to page 214 for details 3 P1 P2 Terminal for indoor unit control PCB A1P SS1 P2 P1 3P156152 1 SS2 ...

Page 38: ... SiUS091601EA 33 Part 3 Printed Circuit Board Connector Wiring Diagram 3 Wired Remote Controller 3 1 BRC1E73 Wired Remote Controller PCB 1 P1 P2 Terminal for indoor unit 2 R4T Room temperature thermistor P2 R4T P1 2P298037 7 ...

Page 39: ...r 4 S71 Connector for DC fan motor 5 S80 Connector for four way valve coil 6 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 7 HL1 HN1 S Connector for terminal block 8 E1 E2 Terminal for ground wire 9 HR1 HR2 Connector for reactor 10 FU1 FU2 Fuse 3 15 A 250 V 11 FU3 Fuse 20 A 250 V 12 J6 Jumper for facility setting Refer to page 217 for details 13 LED A LED ...

Page 40: ...or Wiring Diagram Caution Replace the PCB if you cut a jumper unintentionally Jumpers are necessary for electronic circuit Improper operation may occur if you cut any of them 2P415459 42 S80 HL1 HN1 S E1 E2 S71 FU3 V2 S40 S30 V3 FU2 S90 J6 S20 LED A FU1 HR1 HR2 V150 ...

Page 41: ... fan motor 4 S80 Connector for four way valve coil 5 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 6 HL1 HN1 S Connector for terminal block 7 E1 E2 Terminal for ground wire 8 U V W Connector for compressor 9 FU1 FU2 Fuse 3 15 A 250 V 10 FU3 Fuse 20 A 250 V 11 J6 Jumper for facility setting Refer to page 217 for details 12 LED A LED for service monitor gree...

Page 42: ... Wiring Diagram Caution Replace the PCB if you cut a jumper unintentionally Jumpers are necessary for electronic circuit Improper operation may occur if you cut any of them E1 E2 FU3 V2 V3 FU1 V150 FU2 U V W S20 LED A S90 J6 S40 S70 2P381219 4 2P575834 12 HL1 HN1 S S80 ...

Page 43: ...oad protector 3 S70 Connector for DC fan motor 4 S80 Connector for four way valve coil 5 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 6 HL1 HN1 S Connector for terminal block 7 E1 E2 Terminal for ground wire 8 U V W Connector for compressor 9 FU1 FU2 Fuse 3 15 A 250 V 10 FU3 Fuse 30 A 250 V 11 J6 Jumper for facility setting Refer to page 217 for details 1...

Page 44: ...d protector 4 S70 Connector for DC fan motor 5 S80 Connector for four way valve coil 6 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 7 S201 202 Connector for service monitor PCB PCB2 8 CK1 Connector for voltage endurance test 9 HL1 HN1 Connector for terminal block power supply 10 E1 E2 Terminals for ground wire 11 U V W Connector for compressor 12 FU1 FU2 ...

Page 45: ...SiUS091601EA Outdoor Unit Part 3 Printed Circuit Board Connector Wiring Diagram 40 V401 E1 E2 FU1 V3 V2 FU3 HN1 HL1 CK1 S20 S90 S201 S S70 S202 U V W FU2 S80 S40 2P455785 14 ...

Page 46: ...tor PCB PCB2 SW1 SW4 and LED1 LED5 do not work 1 S501 S502 Connector for main PCB PCB1 2 LED A LED for service monitor green 3 SW5 3 Switch for facility setting Refer to page 217 for details 4 SW6 1 Switch for drain pan heater Refer to page 218 for details 3P346711 10 S502 SW6 1 SW5 3 LED A S501 ...

Page 47: ...less LAN Adaptor PCB Connectors 5 2 KRP067A41 KRP980B2 Remote Control PC board Set Adaptor PCB 1 CN1 Connector for S21 or S403 3P356259 2 CN1 Models Connector FTX09 12 15NMVJU S403 FTX18 24UVJU S21 FVXS series S21 1 S21 Connector for wireless LAN adaptor PCB 2 S601 S602 Connector for S403 on indoor unit control PCB 3P166094 3 3P166094 4 S601 S21 S602 ...

Page 48: ...ns for FDMQ Series 66 3 1 Fan Speed Control for Indoor Unit 66 3 2 Program Dry Operation 67 3 3 Clock and Calender Setting With BRC1E73 68 3 4 Schedule Timer Operation With BRC1E73 70 3 5 Drain Pump Control 73 3 6 Hot Start Control In Heating Operation Only 75 3 7 Other Functions 76 4 Thermistor Functions 77 5 Control Specification 78 5 1 Mode Hierarchy 78 5 2 Frequency Control 78 5 3 Controls at ...

Page 49: ...ature control is done by the target temperature appropriately adjusted for the indoor unit and the temperature detected by room temperature thermistor 1 2 Frequency Principle Control Parameters The frequency of the compressor is controlled by the following 2 parameters The load condition of the operating indoor unit The difference between the room thermistor temperature and the target temperature ...

Page 50: ... maintained even when the outdoor temperature is 2 C 35 6 F Comfortable air conditioning A fine adjustment is integrated to keep 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 Frequency Limits The following functions regulate maximum frequency Low frequency Four wa...

Page 51: ... over the room Heating During heating operation the large flap directs airflow downward to spread the warm air to the entire room Wide Angle Louvers The louvers made of elastic synthetic resin provide a wide range of airflow that guarantees comfortable air distribution Auto Swing The following tables explain the auto swing process for cooling dry heating and fan FTX series Flap up and down Louver ...

Page 52: ...lades flaps move downward 3 The vertical blades louvers move from the left to the right 4 The horizontal blades flaps move upward Airflow Selection Setting FVXS Series Airflow direction can be set with the airflow selection switch Open the front panel Before opening the front panel be sure to stop the operation and turn the breaker off Do not touch the aluminum fins indoor heat exchanger inside th...

Page 53: ...e upper and lower air outlets in order to reach the set temperature quickly When the room has become fully cool or when 1 hour has passed since turning on the air conditioner Air is blown only from the upper air outlet so that air does not come into direct contact with people and indoor temperature is equalized Heating When the operation is activated or when air emitted is of low temperature Air i...

Page 54: ...ontrolled not to blow the air directly at the people in the room The fan speed is controlled automatically within the following steps Cooling L tap MH tap same as automatic Heating L tap M tap The latest command has the priority between POWERFUL and COMFORT AIRFLOW Cooling Heating 09 12 class R4003675 R4003676 15 class R4003682 R4003683 18 24 class R4003684 R4003679 0 65 10 25 65 80 10 20 75 80 ...

Page 55: ...te is automatically controlled within this range when FAN setting button is set to automatic Cooling The following drawing explains the principle of fan speed control for cooling The upper limit is at M tap in 30 minutes from the operation start Heating In heating operation the fan speed is regulated according to the indoor heat exchanger temperature and the difference between the room thermistor ...

Page 56: ... Then the unit operates in an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable level Thermostat turns on also when the room temperature is in the zone B for 10 minutes Room thermistor temperature at start up Target temperature X Thermostat OFF point Y Thermostat ON point Z 24 C or more 75 2 F or more Room thermistor temperature at start up X 2 5 C X 4 5 ...

Page 57: ... Heating Cooling switching point Tr Tt 3 0 C 5 4 F 2 Cooling Heating switching point Tr Tt 3 0 C 5 4 F FTX09 12 15NMVJU Tr Tt 2 5 C 4 5 F FTX18 24UVJU 3 Thermostat ON OFF point is the same as the ON OFF point of cooling or heating operation 4 During initial operation Tr Ts Cooling operation Tr Ts Heating operation FTX09 12 15NMVJU FVXS Series Ex When the target temperature is 25 C 77 F Cooling 23 ...

Page 58: ...ermined monitoring time Cooling Dry Heating FTX Series FVXS Series Refer to Temperature Control on page 44 for details Cooling Dry Heating FTX09 12 15NMVJU 10 minutes 7 5 minutes 10 seconds FTX18 24UVJU 10 minutes 10 minutes 10 seconds FVXS series 10 minutes 10 minutes 10 seconds Zone B Zone B Zone A Zone A OFF OFF ON ON Zone C Zone C Room thermistor temperature target temperature 1 5 C 2 7 F R224...

Page 59: ...ses the target temperature slightly in the case of cooling or lowers the target temperature 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 R23917 Target temperature 0 5 C 0 9 F temperature shift Operation stops at the set hour 0 5 C 0 9 F 1 hour TIMER ...

Page 60: ...less remote controller Details When this function is activated the maximum capacity also decreases The remote controller can send the ECONO command when the unit is in cooling heating dry or automatic operation This function can only be set when the unit is running To cancel the ECONO operation press ECONO or Econo Quiet button several times until the ECONO symbol on the remote controller disappea...

Page 61: ... 60 rpm when no one is in the area When there is no signal from the motion sensor in 20 minutes the microcomputer judges that nobody is in the room and operates the unit at a temperature shifted from the target temperature Cooling Dry 1 2 C 1 8 3 6 F higher Heating 2 C 3 6 F lower Auto according to the operation mode at that time 1 sec Sampling 20 msec High Low ON OFF High Low R24035 Condition of ...

Page 62: ...ooling POWERFUL operation cannot be used together with ECONO COMFORT AIRFLOW or OUTDOOR UNIT QUIET operation 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 B FAN H tap A rpm AUTO Same as cooling heating in POWERFUL operation The target temperature is kept unchanged A FTX09 12 15NMVJU 80 rpm FTX18 24UVJU ...

Page 63: ... Select button to set the clock to the current day of the week 3 Press Clock button blinks 4 Press Select or Select button to set the clock to the present time Holding down Select or Select button rapidly increases or decreases the time display 5 Press Clock button to set the clock Point the remote controller at the indoor unit when pressing the button blinks and clock setting is completed 0 00 Se...

Page 64: ...0 0 2 2 0 3 7 1 0 3 8 0 0 6 77 F 25 C 81 F 27 C 4 m a r g o r p 3 m a r g o r p 2 m a r g o r p 1 m a r g o r p F F O N O F F O N O Saturday No timer settings Sunday Make timer settings for programs 1 4 0 0 1 2 0 0 9 1 0 0 0 1 0 0 8 81 F 27 C 81 F 27 C 77 F 25 C N O F F O F F O N O program 1 program 2 program 3 program 4 OFF OFF ON ON Tuesday to Friday Use the copy mode to make settings for Tuesda...

Page 65: ...isplayed 1 to 4 settings can be made per day Pressing changes the reservation number and the day of the week 3 Press The day of the week and reservation number will be set and blink 4 Press to select the desired mode Pressing changes the or setting in sequence ON TIMER OFF TIMER blank No Setting Pressing puts the sequence in reverse 5 Press 2 Press to select the desired day of the week and reserva...

Page 66: ...ng tone and blinking of the OPERATION lamp is displayed on the LCD and WEEKLY TIMER operation is activated The TIMER lamp lights orange A reservation made once can be easily copied and the same settings used for another day of the week Refer to Copy mode Notes on WEEKLY TIMER operation Do not forget to set the clock on the remote controller first The day of the week ON OFF TIMER mode time and set ...

Page 67: ...another day of the week The whole reservation of the selected day of the week will be copied The whole reservation of the selected day of the week will be copied The reservation will be copied to the selected day of the week The whole reservation of the selected day of the week will be copied To continue copying the settings to other days of the week repeat STEP 4 and STEP 5 is displayed on the LC...

Page 68: ...e reservation number and press The mode is switched to setting mode Proceed to Setting mode STEP 4 is displayed on the LCD and WEEKLY TIMER operation is activated The TIMER lamp lights orange disappears from the LCD The TIMER lamp goes off To reactivate the WEEKLY TIMER operation press again If a reservation deactivated with is activated once again the last reservation mode will be used Press to s...

Page 69: ...ut 5 seconds 4 Press If there are still other reservations WEEKLY TIMER operation will be activated All reservations Hold for about 5 seconds with the normal display 2 Press to select the day of the week and the reservation number to be deleted and or blink Pressing changes the ON OFF TIMER mode in sequence Selecting blank will cancel any reservation you may have This function can be used for dele...

Page 70: ... OFF switch once to start operation Press once again to stop it ON OFF switch is useful when the remote controller is missing or the battery has run out Forced Cooling Operation Forced cooling operation can be started by pressing ON OFF switch for 5 to 9 seconds while the unit is not operating Refer to page 199 for details Forced cooling operation is not started if ON OFF switch is pressed for 10 ...

Page 71: ...poses The system may turn off the fan when the room temperature is satisfied It is normal for a delay to occur when changing the fan speed If the Auto is selected for the fan speed the fan speed varies automatically based on the difference between set temperature and room temperature R4003380 With Wireless Remote Controller BRC082A43 Press FAN SPEED CONTROL button High Medium or Low fan speed can ...

Page 72: ...get temperature is divided into two zones Then the unit operates in an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable level Room thermistor temperature at start up Target temperature X Thermostat OFF point Y Thermostat ON point Z 24 5 C or more 76 1 F or more Room thermistor temperature at start up X 2 5 C X 4 5 F X 1 0 C X 1 8 F 16 5 24 C 61 7 75 2 F ...

Page 73: ... the button causes the number to change continuously Press buttons to select Clock Calendar on the main menu screen Press Menu OK button to display the clock calendar screen Select Month with buttons Change the month with buttons Holding down the button causes the number to change continuously Select Day with buttons Change the day with buttons Holding down the button causes the number to change c...

Page 74: ...tons Change the minute with buttons Holding down the button causes the number to change continuously Press Menu OK button The confirmation screen will appear The date can be set between January 1 2015 and December 31 2099 Press button to select Y es on the confirmation screen Press Menu OK button to confirm the clock and return to the basic screen When setting the schedule the display returns to t...

Page 75: ...at the setback function is disabled for this time period __ Indicates that the temperature setpoint and setback temperature setpoint for this time period is not specified The last active setpoint will be utilized 1 Press buttons to select Schedule Press Menu OK button to display the schedule screen The date time screen will appear 2 Before setting the schedule the clock must be set If the clock ha...

Page 76: ...on is pressed 3 Press buttons to select Y es on the confirmation screen Pressing Menu OK button enters the daily patterns in the schedule and takes you back to the main menu screen R24074 1 The schedule screen will appear Press buttons to select Settings on the schedule screen The settings screen will appear when Menu OK button is pressed 2 Press buttons to select the day to be set It cannot be se...

Page 77: ...e temperature setpoint and setback temperature setpoint for this time period is not specified The last active setpoint will be utilized Indicates that the setback function is disabled for this time period 5 A maximum of five actions per day can be set Press Menu OK button when settings for each day are completed The confirmation screen will appear T o copy the settings for the previous day press M...

Page 78: ...ay the schedule screen Press buttons to select Enable Disable on the schedule screen Press Menu OK button to display the enable disable screen Press buttons to select Enable or Disable on the enable disable screen Press Menu OK button after selecting the item The confirmation screen is displayed Press buttons to select Y es on the confirmation screen Pressing Menu OK button confirms the enable dis...

Page 79: ... turns ON again after 5 seconds 1 If the float switch turns ON again during the residual operation of the drain pump cooling operation also turns on again thermostat ON 2 If the float switch remains OFF even after the residual operation of the drain pump has ended the error code A3 is determined 3 The drain pump turns OFF once residual operation has ended then turns ON again after 5 seconds 4 Afte...

Page 80: ...in 5 sec 5 min 5 min 5 sec 5 min 5 min 5 sec 5 min 5 min 5 sec 5 sec 5 min 5 min 1 2 3 5 sec 1 If the float switch continues to turn OFF and ON 5 times consecutively it is judged as a drain system error and the error code AF is determined 2 The drain pump continues to turn ON OFF in accordance with the float switch ON OFF even after AF is determined 3 While the error code AF is displayed if the fl...

Page 81: ...when the power supply is restored to the conditions prior to the power failure It takes 3 minutes to restart the operation because 3 minute standby function is activated 3 7 3 Emergency Operation Switch With BRC082A43 Outline When the wireless remote controller does not work due to battery failure or the absence thereof use the emergency operation switch Details Start Press emergency operation swi...

Page 82: ...rmistor The outdoor temperature thermistor detects the outdoor air temperature and is used for refrigerant shortage detection input current control outdoor fan control liquid compression protection function and so on 4 Indoor Heat Exchanger Thermistor The indoor heat exchanger thermistor is used for controlling the target discharge pipe temperature The system sets the target discharge pipe tempera...

Page 83: ...rder of priority 1 Limiting defrost control time 2 Forced cooling Air conditioner control mode Forced operation mode Forced cooling operation for pump down operation Power transistor test mode Normal operation mode Fan Cooling includes drying Heating Heating Defrosting Stop indoor unit OFF Preheating control Discharging from capacitor Stop R22375 Command frequency Limit frequency Skip control Uppe...

Page 84: ...e is calculated in each sampling time 20 seconds and the frequency is adjusted according to its difference from the frequency previously calculated 2 I control If the operating frequency does not change for more than a certain fixed time the frequency is adjusted according to the D value When D value is low the frequency is lowered When D value is high the frequency is increased 3 Frequency contro...

Page 85: ...ion fin temperature 85 C 185 F OFF condition Discharge pipe temperature 12 C 53 6 F Radiation fin temperature 90 C 194 F 12 18 24 class ON condition Discharge pipe temperature Outdoor temperature x A B Outdoor temperature C Radiation fin temperature D OFF condition Discharge pipe temperature Outdoor temperature x A E Outdoor temperature F Radiation fin temperature G 5 3 2 Four Way Valve Switching ...

Page 86: ... frequency decreases depending on the outdoor temperature 5 3 4 3 Minute Standby Turning on the compressor is prohibited for 3 minutes after turning off The function is not used when defrosting 5 3 5 Compressor Protection Function When turning the compressor from OFF to ON the upper limit of frequency is set as follows The function is not used when defrosting Values refer to 15 18 24 class only wh...

Page 87: ...ol 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 09 class 12 18 24 class 15 class C F C F C F A 110 230 0 120 248 0 110 230 0 B 103 217 4 111 231 8 103 217 4 C 98 208 4 109 ...

Page 88: ...ropping zone The upper limit of the compressor frequency is defined as operation frequency 2 Hz After this the output frequency is lowered by 2 Hz every second until it reaches the keep zone Keep zone The present maximum frequency goes on Reset zone Limit of the frequency is canceled Limitation of current dropping and stop value according to the outdoor temperature The current drops when outdoor t...

Page 89: ...eat exchanger temperature The valves might drop when the outdoor temperature is low to protect the compressor Reset zone Up zone Keep zone Dropping zone Stop zone 13 C 55 4 F 7 C 44 6 F 3 C 37 4 F 0 C 32 0 F 5 C 41 0 F Reference Indoor heat exchanger temperature R2T Zone Control Stop zone When the temperature reaches the stop zone the compressor stops Dropping zone The upper limit of frequency dec...

Page 90: ...forced operation The outdoor fan is controlled as well as normal operation during forced operation 6 Fan speed control during POWERFUL operation The rotation speed of the outdoor fan is increased during POWERFUL operation 7 Fan speed control during indoor outdoor unit quiet operation The rotation speed of the outdoor fan is reduced by the command of the indoor outdoor unit quiet operation 8 Fan ON...

Page 91: ...ted time have passed since the start of the operation or ending the previous defrosting Conditions for Canceling Defrost The judgment is made with the outdoor heat exchanger temperature B 09 class 12 class 15 class 18 24 class A minute 20 25 20 25 44 15 25 B C 2 20 2 20 6 12 4 12 F 35 6 68 0 35 6 68 0 42 8 86 0 42 8 86 0 C Hz 64 40 48 48 D Hz 64 40 70 54 E seconds 40 40 60 60 F seconds 60 60 60 12...

Page 92: ...en the discharge pipe thermistor is disconnected Feedback Control Target discharge pipe temperature control Details The followings are the examples of electronic expansion valve control for each operation mode R4003560 Available Not available Control Status Starting operation control Control when the frequency changes Target discharge pipe temperature control Discharge pipe thermistor disconnectio...

Page 93: ...ng 5 11 4 Starting Operation Control The electronic expansion valve opening is controlled when the operation starts thus preventing superheating or liquid compression 5 11 5 Control when the Frequency Changes When the target discharge pipe temperature control is active if the target frequency changes to a specified value in a certain time period the target discharge pipe temperature control is can...

Page 94: ...rror counter is reset Details Determining thermistor disconnection When the starting control finishes the detection timer for disconnection of the discharge pipe thermistor A seconds starts When the timer is over the following adjustment is made 1 When the operation mode is cooling When the following condition is fulfilled the discharge pipe thermistor disconnection is ascertained Discharge pipe t...

Page 95: ...he electronic expansion valve 5 12 Malfunctions 5 12 1 Sensor Malfunction Detection Sensor malfunction can be detected in the following thermistor 1 Outdoor heat exchanger thermistor 2 Discharge pipe thermistor 3 Radiation fin thermistor 4 Outdoor temperature thermistor 5 12 2 Detection of Overcurrent and Overload Outline An excessive output current is detected and the OL temperature is observed t...

Page 96: ...SiUS091601EA 91 Part 5 Remote Controller 1 Applicable Remote Controller 92 2 ARC466A21 93 3 ARC466A37 95 4 ARC480A8 97 5 BRC082A43 98 6 BRC1E73 100 Part 5 Remote Controller ...

Page 97: ...iness Portal Document Search Item Category Installation Operation Manual URL https global1d daikin com business_portal login Series Model Name Wireless Remote Controller Reference Page Wired Remote Controller Reference Page FTX N U FTX09NMVJU ARC480A8 97 BRC944B2 option FTX12NMVJU FTX15NMVJU FTX18UVJU ARC466A37 95 FTX24UVJU FVXS N FVXS09NVJU ARC466A21 93 FVXS12NVJU FVXS15NVJU FDMQ R FDMQ12RVJU BRC...

Page 98: ...g button In indoor unit quiet operation operation sound becomes weak The airflow rate also decreases In DRY operation the airflow rate setting is not available Selects the airflow rate setting every time you press this button Display LCD Displays the current settings In this illustration each section is shown with all its displays on for the purpose of explanation Changes the temperature setting T...

Page 99: ...not be used at the same time Priority is given to the function you pressed last Quiet button Cancels the timer setting Cannot be used for the WEEKLY TIMER operation Timer Cancel button Off Timer button NIGHT SET mode Press this button and adjust the day and time with Select button Press this button again to complete TIMER setting Press this button and adjust the day and time with Select button Pre...

Page 100: ...tton In indoor unit quiet operation operation sound becomes weak The airflow rate also decreases In DRY operation the airflow rate setting is not available Auto Indoor unit quiet Low Middle low Middle Middle high High Temperature adjustment buttons Changes the temperature setting AUTO DRY COOL HEAT FAN Not available Not available 64 86 F 18 30 C 64 90 F 18 32 C 50 86 F 10 30 C Signal transmitter T...

Page 101: ...ration mode AUTO DRY COOL HEAT FAN Every time you press Econo Quiet button the setting changes in the following order OUTDOOR UNIT QUIET operation is not available in FAN and DRY operation OUTDOOR UNIT QUIET operation and ECONO operation cannot be used at the same time with POWERFUL operation Priority is given to the function you pressed last Econo 4 Quiet button ECONO Blank No setting Combination...

Page 102: ...irflow direction When you press the SWING button the flap moves up and down The flap stops when you press the SWING button again SWING 5 button POWERFUL 3 button Starts POWERFUL operation ON TIMER button Adjusts the ON TIMER setting The timer can be set 1 12 hours Direct operation buttons Starts the COOL DRY HEAT or FAN ONLY operation FAN setting button AUTO Indoor unit quiet Airflow rate 1 5 Low ...

Page 103: ...C082A43 R25006 7 9 12 10 11 13 14 15 8 1 3 4 5 2 6 DOWN FAN UP ON OFF M H L hr hr TEST MODE TIMER RESERVE CANCEL DOWN UP TEST FAN TIME TEMP ON OFF M H L hr hr TEST F F The situation which opened the front cover of the remote control R25007 18 19 21 16 20 17 ...

Page 104: ...SETTING BUTTON Use this button for SETTING TEMPERATURE Operates with the front cover of the remote controller closed PROGRAMMING TIMER BUTTON Use this button for programming START and or STOP time Operates with the front cover of the remote controller opened TIMER MODE START STOP BUTTON TIMER RESERVE CANCEL BUTTON OPERATION MODE SELECTOR BUTTON Press this button to select OPERATION MODE FILTER SIG...

Page 105: ...ote Controller 100 6 BRC1E73 3 Menu OK button 8 On Off button 10 Cancel button 9 Operation lamp 11 LCD with backlight 4 Up button 5 Down button 6 Right button 7 Left button 1 Operation mode selector button 2 Fan speed control button ...

Page 106: ...ill be illuminated for approximately 30 seconds by pressing any button If two remote controllers are used to control a single indoor unit only the controller accessed first will have backlight functionality Press this button to select the fan speed of your preference Available fan speeds vary with the indoor unit model Used to enter the main menu Used to enter the selected item Used to raise the s...

Page 107: ...tailed and Simple displays can be selected in the main menu 10 Changeover controlled by the master indoor unit 9 Under centralized control 4 Stand by for Defrost Hot start The airflow direction clock and selectable item appear on Detailed display screen in addition to the items appearing on Standard display Displayed only when the indoor unit is turned on with no fan speed control function with no...

Page 108: ...Fan speed 3 Setpoint 1 Operation mode 14 Selectable Display Item 11 Setback 4 Stand by for Defrost Hot start Depending on the field settings while the indoor unit is stopped OFF may be displayed instead of the operation mode and or the setpoint may not be displayed Note for all display modes ...

Page 109: ...ted Displayed when another indoor unit on the system has the authority to change the operation mode between cool and heat Displayed when an energy recovery ventilator is connected Ventilation Mode icon These icons indicate the current ventilation mode ERV only AUTO ERV BYPASS Air Purify ICON This icon indicates that the air purifying unit Optional is in operation Used to display the fan speed that...

Page 110: ...odel does not include oscillating louvers this item will not be displayed Displayed if the clock is set If the clock is not set will be displayed 12 hour time format is displayed by default Select 12 24 hour time display option in the main menu under Clock Calendar Room temperature is selected by default For other choices see the operation manual Displayed when the clock needs to be set The schedu...

Page 111: ...7 6 Troubleshooting for FDMQ Series 138 6 1 Indoor Unit PCB Abnormality 138 6 2 Drain Level Control System Abnormality 139 6 3 Indoor Fan Motor DC Motor or Related Abnormality 140 6 4 Indoor Fan PCB Abnormality 142 6 5 Humidifier or Related Abnormality 143 6 6 Thermistor or Related Abnormality 144 6 7 Remote Controller Thermistor Abnormality 145 6 8 Low voltage Detection or Over voltage Detection ...

Page 112: ...e Rise 176 7 15 Output Overcurrent Detection 178 7 16 Signal Transmission Error on Outdoor Unit PCB 180 8 Check 181 8 1 Thermistor Resistance Check 181 8 2 Indoor Fan Motor Connector Check 182 8 3 Power Supply Waveform Check 184 8 4 Electronic Expansion Valve Check 184 8 5 Four Way Valve Performance Check 185 8 6 Inverter Unit Refrigerant System Check 185 8 7 Inverter Analyzer Check 186 8 8 Rotati...

Page 113: ...tion lamp OFF Check the outdoor temperature Heating cooling operations are not available when the outdoor temperature is out of the operation limit Check the reference page for the operation limit 236 Diagnose with remote controller indication 123 The unit operates but does not cool or does not heat Check for wiring and piping errors in the connection between the indoor unit and outdoor unit Check...

Page 114: ...unit is activated or when the thermistor malfunctions A signal transmission error occurs between the indoor and outdoor units In either case conduct the diagnostic procedure described in the following pages FTX Series FVXS Series R4003515 FDMQ series with BRC1E73 R4003516 R6000666 R6000667 ON OFF Operation lamp green Operation lamp green Operation lamp green Operation lamp green The error or warni...

Page 115: ...ccurs the operation lamp on the receiver blinks R4003517 2 2 Outdoor Unit The outdoor unit has one green LED LED A on the PCB When the microcomputer works in order the LED A blinks However the LED A turns OFF while the standby electricity saving function is activated and the power supply is OFF Refer to page 34 36 38 39 for the location of LED A Operation lamp red ...

Page 116: ...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 error codes are displayed When you cannot find the error code try method 2 Refer to page 112 The code indication changes in the sequence shown below ARC480A8 ARC480 Series TIMER CANCEL button No Code No Code No Code No Code 1 00 12 H0 23 J3 34 H7 2 A5 13 A6 ...

Page 117: ...on 3 Press FAN button to enter the service check mode R6000669 00 is displayed and the left side number blinks R6000696 4 Press TEMP or TEMP button and change the number until you hear the two consecutive beeps or the long beep R6000670 5 Diagnose by the sound Beep The left side number does not correspond with the error code Two consecutive beeps The left side number corresponds with the error cod...

Page 118: ...6000670 8 Diagnose by the sound Beep The left side number does not correspond with the error code Two consecutive beeps The left side number corresponds with the error code but the right side number does not Long beep Both the left side and right side numbers correspond with the error code 9 Determine the error code The numbers indicated when you hear the long beep are the error code Refer to page...

Page 119: ... 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 error codes are displayed When you cannot find the error code try method 2 Refer to page 115 The code indication changes in the sequence shown below ARC466A21 A37 R24045 ARC466 Series Timer Cancel button No Code No Code No Code No Code 1 00 11 H6 21 C5 31 U2 2 A5 ...

Page 120: ...3 Press Mode button to enter the service check mode The left side number blinks 4 Press Temp or Temp button and change the number until you hear the two consecutive beeps or the long beep 5 Diagnose by the sound Beep The left side number does not correspond with the error code Two consecutive beeps The left side number corresponds with the error code but the right side number does not R24046 R1182...

Page 121: ...he sound Beep The left side number does not correspond with the error code Two consecutive beeps The left side number corresponds with the error code but the right side number does not Long beep Both the left side and right side numbers correspond with the error code 9 Determine the error code The numbers indicated when you hear the long beep are the error code Refer to page 123 10 Press Mode butt...

Page 122: ...intenance Information Configuration Current Settings Clock Calendar Daylight Saving Time Language Press Cancel button once Press Menu OK button once Basic Screen Operation mode changeover Fan speed control Menu display Confirmation of each setting On Off Cancel Operation lamp Press Cancel button for 4 seconds or more Press Cancel button once Press Cancel button for 4 seconds or more Press Cancel b...

Page 123: ...button Operation lamp 2 Error Code A1 Contact Info 0123 456 7890 Indoor Model 000 Outdoor Model 000 If an error occurs either one of the following items will flash in the basic screen The Operation lamp will flash For Simple display the message is not displayed and only the Operation lamp flashes The Operation lamp will not flash For Simple display the message is not displayed and the Operation la...

Page 124: ... be checked z Error codes z Indoor model code Service data can be obtained z Error code history z Temperature data of various sections Service settings can be made z Forced fan ON z Airflow rate setting Press INSPECTION TEST OPERATION button once Press ON OFF button within 10 seconds to start test operation Test operation will stop automatically after 15 30 minutes Thermostat is forcibly turned on...

Page 125: ...t indication of the error code blinks Step Action UP button DOWN button R15408 If you hear Then 3 short beeps Follow all steps below e h t e u n i t n o C 4 d n a 3 s p e t s w o l l o F p e e b t r o h s 1 operation in step 4 until you hear a long beep This long beep indicates that the error code is confirmed y t i l a m r o n b a o n s i e r e h T p e e b g n o l 1 R24051 OPERATION MODE SELECTOR...

Page 126: ...DE SELECTOR button The right 0 lower digit indication of the error code blinks Step Action UP button DOWN button R15411 UP DOWN 4 5 6 7 8 9 U P L J F H E C A 0 If you hear Then 2 short beeps The upper digit matches h c t a m s t i g i d o N p e e b t r o h s 1 h c t a m s t i g i d r e w o l d n a r e p p u h t o B p e e b g n o l 1 R24052 OPERATION MODE SELECTOR button ...

Page 127: ...SELECTOR button to return to the normal mode If you do not press any button for 1 minute the remote controller automatically returns to the normal mode Step Action UP button DOWN button R15413 UP DOWN F E J C H A 9 8 7 6 5 4 3 2 1 0 If you hear Then 2 short beeps No digits match h c t a m s t i g i d r e w o l d n a r e p p u h t o B p e e b g n o l 1 R24053 OPERATION MODE SELECTOR button ...

Page 128: ...difier or related abnormality 143 C4 Indoor heat exchanger thermistor or related abnormality 132 132 144 C5 144 C9 Room temperature thermistor or related abnormality 132 132 144 CJ Remote controller thermistor abnormality 145 Outdoor Unit E1 Outdoor unit PCB abnormality 153 E5 OL activation compressor overload 154 E6 Compressor lock 157 E7 DC fan lock 158 E8 Input overcurrent detection 159 EA Four...

Page 129: ...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 Combination of the indoor and outdoor unit matched Check the connection of connectors YES NO NO YES NO NO YES R23407 Caution To secure the connection disconnect the connectors once and then reconnect YES NO YES N...

Page 130: ... for FTX FVXS Series SiUS091601EA 125 Part 6 Service Diagnosis Note Connectors FTX09 12NMVJU FTX18 24UVJU FVXS series Terminal Control PCB H1 H2 H3 FTX15NMVJU Terminal Filter PCB S100 Filter PCB S800 Control PCB S900 ...

Page 131: ... 32 F Heating peak cut control During heating operation the indoor heat exchanger temperature is above 59 60 C 138 2 140 F Supposed Causes Short circuited air Clogged air filter of the indoor unit Dust accumulation on the indoor heat exchanger Defective indoor heat exchanger thermistor Defective indoor unit PCB Troubleshooting NO NO NO Check No 01 Check the indoor heat exchanger thermistor YES YES...

Page 132: ...Troubleshooting for FTX FVXS Series SiUS091601EA 127 Part 6 Service Diagnosis Reference Check No 01 Refer to P 181 ...

Page 133: ...g of wire inside the fan motor Breaking of the fan motor lead wires Defective capacitor of the fan motor Defective indoor unit PCB Troubleshooting FTX09 12 15NMVJU Caution OK NO YES YES NO Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Check the connector for connection Note The motor may break when the motor connector is disconnected wit...

Page 134: ...hort circuit Check the motor control voltage Check the indoor unit PCB for rotation pulse Fan rotates smoothly Resistance OK Is the motor control voltage 15 VDC generated Replace the indoor fan motor Replace the indoor unit PCB control PCB Replace the indoor fan motor Replace the indoor unit PCB control PCB YES NO NO Abnormal sound occurs Is the rubber cushion properly fitted YES Correct the posit...

Page 135: ...ting the connector Replace the indoor fan motor Replace the indoor unit PCB control PCB Replace the indoor unit PCB control PCB Does the fan rotate smoothly Does the fan rotate Motor power supply voltage 310 340 VDC Turn off the power and rotate the fan by hand Turn on the power and start operation Check No 02 Check the output of the fan motor connector R22444 YES NO YES NO YES NO Replace the indo...

Page 136: ...Troubleshooting for FTX FVXS Series SiUS091601EA 131 Part 6 Service Diagnosis Note s Reference The rotation pulse is the feedback signal from the indoor fan motor Check No 02 Refer to P 182 ...

Page 137: ... less with the power on Supposed Causes Disconnection of connector Defective thermistor s Defective indoor unit PCB Troubleshooting C4 Indoor heat exchanger thermistor C9 Room temperature thermistor Check No 01 Refer to P 181 YES R21870 NO Check No 01 Check the thermistor resistance value YES NO Caution Correct the connection Replace the defective thermistor s Replace the indoor unit PCB control P...

Page 138: ... V depending on the model The compressor stops if the error occurs and restarts automatically after 3 minute standby Over voltage detection An over voltage signal is fed from the over voltage detection circuit to the microcomputer over 458 500 V depending on the model The compressor stops if the error occurs and restarts automatically after 3 minute standby Supposed Causes Power supply voltage out...

Page 139: ...ed NO NO YES YES YES YES Reconnect the harness Check the power supply voltage Check the connection of the compressor harness Precaution before turning on the power again Make sure the power has been off for at least 30 seconds Disturbance factors Noise Power supply distortion Turn on the power System restarted Repeat a few times Loose or disconnected NO NO Replace the outdoor fan motor and the out...

Page 140: ...whether it is normal Error Decision Conditions The data sent from the outdoor unit cannot be received normally or the content of the data is abnormal Supposed Causes Power supply voltage not as specified Reduction of power supply voltage Wiring error Breaking of the connection wires between the indoor and outdoor units wire No 3 Defective outdoor unit PCB Short circuit inside the fan motor winding...

Page 141: ... connection wires between the indoor unit and outdoor unit Is LED A blinking Properly insulated Is there any disturbance Is there any wiring error Check the indoor unit outdoor unit connection wires Check the LED A on the outdoor unit PCB Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Before you check the LED A cancel the standby electric...

Page 142: ...ng models interconnected Wrong wiring of connecting wires Wrong indoor unit PCB or outdoor unit PCB mounted Defective indoor unit PCB Defective outdoor unit PCB Troubleshooting R20435 Caution NO YES YES NO Match the compatible models OK Correct the connection Check the code numbers 2P012345 for example of the indoor and outdoor unit PCB with the Parts List If not matched change for the correct PCB...

Page 143: ...n be erased either within the computer or externally and usually requires more voltage for erasure than the common 5 volts used in logic circuits It functions like non volatile RAM but writing to EEPROM is slower than writing to RAM Supposed Causes Defective indoor unit PCB External factor noise etc Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting con...

Page 144: ... sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Connect the drain pump Replace the indoor unit PCB control PCB Replace the drain pump There is a drain system abnormality Connect the float switch Replace the float switch Replace the indoor unit PCB control PCB R25079 NO YES NO NO YES YES Is the drain pump connected to X25A on the indoor unit ...

Page 145: ...he indoor unit PCB and the fan PCB Defective fan PCB Defective fan motor No fuse continuity Trouble Shooting R6000547 Connect the connector correctly Turn OFF the power supply and wait for 10 minutes NO YES NO Connect the connector correctly NO YES YES Replace the fuse There is a continuity in the fuse 2 on the fan PCB or fan motor harness NO The fan motor connector 1 is connected to the fan PCB R...

Page 146: ...eplace the fan motor Each resistance between the pins is equal to or lower than 1 Replace the fan motor Replace the fan PCB A2P The HAP lamp on the indoor unit control PCB is blinking while the HAP lamp on the fan PCB is not blinking YES YES Check the fan motor connectors Check No 02 Replace the fan PCB A2P p When A6 abnormality still reoccurs replace the fan motor A Turn ON the power supply while...

Page 147: ...ore connecting or disconnecting connectors or parts may be damaged Check for the indoor unit control PCB A1P and the fan PCB A2P Connect the connector correctly NO YES YES Is the connector X3A on the fan PCB connected correctly Connect the connector correctly NO YES Is the connector X70A on the indoor unit control PCB connected correctly Replace the harness YES Is the harness connecting X3A and X7...

Page 148: ...ifier s Clogged electric expansion value in humidifier s Defective indoor unit PCB Troubleshooting The system continues to operate with the thermostat OFF even while the error code is displayed YES YES NO NO Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged The float switch may be defective Check if the drain up height and the horizo...

Page 149: ...hanging the indoor unit PCB To check the thermistors proceed as follows 1 Disconnect the thermistor from the indoor unit PCB 2 Read the temperature and the resistance value 3 Check if the measured values correspond with the values in the table of thermistor resistance check C4 Indoor heat exchanger thermistor 1 liquid pipe R2T C5 Indoor heat exchanger thermistor 2 R3T C9 Room temperature thermisto...

Page 150: ... is running Supposed Causes Defective room temperature thermistor in the wired remote controller Defective wired remote controller PCB External factor such as noise Troubleshooting To delete the record of error codes press ON OFF button on the remote controller for 4 seconds or more while the error code is displayed in the inspection mode Replace the remote controller External factor other than eq...

Page 151: ... depending on the model The compressor stops if the error occurs and restarts automatically after 3 minute standby Over voltage detection An over voltage signal is fed from the over voltage detection circuit to the microcomputer over 458 500 V depending on the model The compressor stops if the error occurs and restarts automatically after 3 minute standby Supposed Causes Power supply voltage out o...

Page 152: ... NO NO YES YES YES YES Reconnect the harness Check the power supply voltage Check the connection of the compressor harness Precaution before turning on the power again Make sure the power has been off for at least 30 seconds Disturbance factors Noise Power supply distortion Turn on the power System restarted Repeat a few times Loose or disconnected NO NO Replace the outdoor fan motor and the outdo...

Page 153: ...is normal Error Decision Conditions The data sent from the outdoor unit cannot be received normally or the content of the data is abnormal Supposed Causes Power supply voltage out of specification Reduction of power supply voltage Wiring error Breaking of the connection wires between the indoor and outdoor units wire No 3 Defective outdoor unit PCB Short circuit inside the fan motor winding Defect...

Page 154: ...the indoor unit and the outdoor unit Replace the outdoor unit PCB main PCB Replace the connection wires between the indoor unit and outdoor unit Is LED A blinking Properly insulated Is there any disturbance Is there any wiring error Check the connection wires between the indoor unit and the outdoor unit Check the LED A on the outdoor unit PCB Be sure to turn off the power switch before connecting ...

Page 155: ...to pages 214 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Are both remote controllers set to MAIN Do es the indoor unit service monitor s blink Does operation return to normal when the power is turned off momentarily NO NO YES YES NO Replace the indoor unit PCB control PCB Set 1 remote controller to SUB turn the power supply off...

Page 156: ...trollers when using 2 remote controllers Defective remote controller PCB Troubleshooting For the way to change MAIN SUB setting of remote controllers refer to pages 214 Turn the power off and then back on If a malfunction occurs replace the remote controller Turn the power off and then back on If a malfunction occurs replace the remote controller Set one remote controller to MAIN turn the power su...

Page 157: ...correct wiring Check again YES YES NO NO Connect the indoor outdoor units correctly YES YES YES YES NO NO NO Blink R24591 Is the combination of indoor outdoor units correct Do es the indoor unit service monitor s blink Are the wirings between indoor unit and outdoor unit correctly connected Connect the wirings correctly NO Is the optional units power supply connected from the indoor unit terminal ...

Page 158: ...ve outdoor unit PCB Noise Momentary drop 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 Continuously ON or OFF Blink YES R21201 NO Replace the outdoor unit PCB main PCB Ground the system Zero cross signal abnormality Replace the outdoor unit PCB main PCB Check if the outdoor unit ...

Page 159: ...em is shut 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 Ref...

Page 160: ...e thermistor Replace the electronic expansion valve or the coil Refer to the refrigerant line check procedure Replace the outdoor unit PCB main PCB Replace the four way valve or the coil Replace the outdoor unit PCB main PCB Discharge pipe thermistor disconnected Check No 01 Check the discharge pipe thermistor Check No 13 Check the four way valve Check No 14 Check the refrigerant line Check No 12 ...

Page 161: ...SiUS091601EA Troubleshooting for Outdoor Unit Part 6 Service Diagnosis 156 Reference Check No 14 Refer to P 185 ...

Page 162: ...f the power Disconnect the harnesses U V and W R21067 Caution NO YES YES NO NO YES NO YES Check No 15 Check with the inverter analyzer 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 main PCB Ope...

Page 163: ...er stuck in the fan Defective fan motor Defective outdoor unit PCB Troubleshooting Check No 16 Refer to P 189 R21669 Caution YES YES NO YES NO NO YES NO NO Turn on the power Rotate the fan YES Check No 16 Check the rotation pulse input on the outdoor unit PCB main PCB Turn off the power and reconnect the connector Remove the foreign matters Replace the outdoor fan motor Replace the fuse Replace th...

Page 164: ...ck No 17 Refer to P 190 Caution Be sure 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 R21863 NO YES YES NO Start operation and measure t...

Page 165: ...SiUS091601EA Troubleshooting for Outdoor Unit Part 6 Service Diagnosis 160 Reference Check No 18 Refer to P 190 ...

Page 166: ...oling Dry A B 5 C A B 9 F Heating B A 5 C B A 9 F A Room thermistor temperature B Indoor heat exchanger temperature If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Disconnection of four way valve coil Defective four way valve coil or harness Defective outdoor unit PCB Defective thermistor s Refrigerant shortag...

Page 167: ...four way valve defective or dust clogged Reconnect the thermistor s Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged R20405 Refrigerant shortage Water mixed Stop valve Four way valve coil disconnected loose Harness disconnected Any thermistor disconnected Check No 01 Check the thermistors Check No 14 Check the refrigerant line Check...

Page 168: ... or outdoor temperature thermistor Defective electronic expansion valve or coil Refrigerant shortage Defective four way valve Water mixed in refrigerant Defective stop valve Defective outdoor unit PCB Troubleshooting Check No 01 Refer to P 181 A B C F C F 09 class 110 230 88 190 4 A B C F C F 12 18 24 class 120 248 107 224 6 15 class 110 230 95 203 R20417 Caution NG OK OK OK NG NG Discharge pipe t...

Page 169: ...SiUS091601EA Troubleshooting for Outdoor Unit Part 6 Service Diagnosis 164 Reference Reference Check No 12 Refer to P 184 Check No 14 Refer to P 185 ...

Page 170: ... exceeds the limit Error Decision Conditions The temperature sensed by the outdoor heat exchanger thermistor rises above 60 62 C 140 143 6 F depending on the model The error is cleared when the temperature drops below 48 5 52 C 119 3 125 6 F depending on the model Supposed Causes Installation space not large enough Dirty outdoor heat exchanger Defective outdoor fan motor Defective stop valve Defec...

Page 171: ... exchanger thermistor Replace the outdoor unit PCB main PCB Replace the electronic expansion valve or the coil Replace the outdoor unit PCB main PCB Change the installation location or direction Clean the outdoor heat exchanger Check the installation space NG OK OK NG NG OK OK OK NG NG Check No 19 Check the outdoor fan Check No 18 Check the discharge pressure Check No 12 Check the electronic expan...

Page 172: ...tion Supposed Causes Abnormal operation due to air intrusion Defective discharge pipe thermistor Troubleshooting Check No 01 Refer to P 181 YES R23655 NO OK NG Caution Replace the outdoor unit Replace both the discharge pipe thermistor and the outdoor unit PCB main PCB Replace the outdoor unit Abnormal deformation of piping in the outdoor unit Check No 01 Check the discharge pipe thermistor Be sur...

Page 173: ...The DC voltage before compressor start up is below 50 V Supposed Causes Broken or disconnected harness Defective outdoor unit PCB Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged NO R24613 YES Turn off the power Then turn on the power to restart the system YES NO Replace the harness Replace the outdoor unit PCB main ...

Page 174: ...dition through the position detection circuit Error Decision Conditions If the error repeats the system is shut down Reset condition Continuous run for about 11 minutes without any other error Supposed Causes Power supply voltage out of specification Disconnection of the compressor harness Defective compressor Defective outdoor unit PCB Start up failure caused by the closed stop valve Input voltag...

Page 175: ...alyzer 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 main PCB Correct the power supply or replace the outdoor unit PCB main PCB Replace the compressor Reconnect the electrical components or compressor harnesses as specified Replace the...

Page 176: ...Troubleshooting for Outdoor Unit SiUS091601EA 171 Part 6 Service Diagnosis Reference Reference Reference R6000565 Check No 15 Refer to P 186 Check No 18 Refer to P 190 Check No 20 Refer to P 191 ...

Page 177: ...or more or 0 04 V or less 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 s Defective heat exchanger thermistor in the case of J3 error outdoor heat exchanger thermistor in cooling operation or indoor heat exchanger thermistor in heating operati...

Page 178: ... defective thermistor s of the following thermistors Outdoor temperature thermistor Discharge pipe thermistor Outdoor heat exchanger thermistor Cooling Outdoor heat exchanger temperature Heating Indoor heat exchanger temperature Replace the indoor heat exchanger thermistor Replace the outdoor unit PCB main PCB Error displayed again on remote controller Indoor heat exchanger thermistor functioning ...

Page 179: ... Troubleshooting Check No 17 Refer to P 190 A B C C F C F C F 09 class 82 179 6 65 149 70 158 12 class 90 194 75 167 81 177 8 15 class 90 194 64 147 2 81 177 8 18 24 class 92 197 6 70 158 77 170 6 Caution WARNING To cool the electrical components the outdoor fan starts when the radiation fin temperature rises above C and stops when the radiation fin temperature drops below B R22998 YES NO YES NG N...

Page 180: ...Troubleshooting for Outdoor Unit SiUS091601EA 175 Part 6 Service Diagnosis Reference Check No 19 Refer to P 191 ...

Page 181: ...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 other error Supposed Causes Defective outdoor fan motor Short circuit Defective radiation fin thermistor Disconnection of connector Defective outdoor unit PCB Silicone grease not applied properly on the radiation fin af...

Page 182: ...necting or disconnecting connectors or parts may be damaged R23953 NO NG OK NO YES Check the radiation fin temperature NO YES YES Above A Check No 19 Check the outdoor fan Error displayed again Has the PCB been replaced Check if silicone grease is applied properly on the radiation fin If not apply the silicone grease Replace the outdoor unit PCB main PCB Replace the outdoor fan motor Correct the c...

Page 183: ...specification Defective compressor Troubleshooting R24911 Caution NO YES NO YES An output overcurrent may result from wrong internal wiring If the system is interrupted by an output overcurrent after the wires have been disconnected and reconnected for part replacement check the wiring again Check No 17 Check No 15 Turn off the power and disconnect the harnesses U V and W Turn off the power Then t...

Page 184: ...econnect the harnesses Turn on the power again and start operation Check the power supply voltage Check the power module Correct the power supply Replace the compressor Correct the power supply or replace the outdoor unit PCB main PCB Replace the outdoor unit PCB main PCB Any LED off Normal Short circuit or wire breakage between compressor s coil phases Check the discharge pressure Go to Check No ...

Page 185: ...1 cannot be received for 9 seconds The error counter is reset when the data from the PM1 can be successfully received Supposed Causes Defective outdoor unit PCB Troubleshooting R21808 Caution YES NO Turn off the power Then turn on the power to restart the system Error again The cause can be an external factor other than the malfunction Observe the operating condition in long term Be sure to turn o...

Page 186: ...24UVJU FVXS series FDMQ series Indoor Unit R1T Room temperature thermistor B A R2T Indoor heat exchanger thermistor A A R1T Suction air thermistor A R2T Middle thermistor A R3T Liquid pipe thermistor A A A Outdoor Unit R1T Outdoor air temperature thermistor A A A R2T Outdoor heat exchanger thermistor A A A R3T Discharge pipe thermistor A A A Multimeter Resistance range Thermistor ASSY Soldered the...

Page 187: ...oltage is generated between the pins 2 3 Rotation pulse check 1 Check the connector for connection 2 Turn the power on and stop the operation 3 Check if the Hall IC generates the rotation pulse 4 times when the fan motor is manually rotated once between the pins 1 3 R6000090 A measurement error might occur in the resistance value depending on the measurement conditions and the method U V V W Resis...

Page 188: ...er supply OFF 2 With the fan motor connector disconnected measure the resistance between each pin then make sure that the resistance is more than the value mentioned in the following table Measuring points Judgement White Blue 1 MΩ or more Orange Blue 100 kΩ or more Brown Blue 100 Ω or more Red Blue 100 kΩ or more 7 6 5 4 3 2 1 S1 Motor power supply voltage 310 340 VDC Unused Unused GND Motor cont...

Page 189: ...onnector is correctly connected to the PCB 2 Turn the power off and on again and check if the EV generates a latching sound 3 If the EV does not generate a latching sound in step 2 disconnect the connector and check the continuity using a multimeter 4 Check the continuity between the pins 5 1 5 2 5 3 5 4 between the pins 6 1 6 2 6 3 and 6 4 for the 6P connector models If there is no continuity bet...

Page 190: ...y valve coil Cooling Dry Defrost Not energized Heating energized Replace the outdoor unit PCB main PCB Replace the four way valve coil Replace the four way valve Four way valve coil resistance at 1000 2000 Ω S80 voltage at 208 230 VAC with compressor on Fig 1 R14674 Fig 1 Compressor ON Voltage at S80 208 230 VAC Time Refrigerant system check Is the discharge pipe thermistor disconnected from the h...

Page 191: ...in smoothing electrolytic capacitor drops to 10 VDC or below before carrying out the service work R6000682 Reference If the terminals of the compressor are not FASTON terminals difficult to remove the wire on the terminals it is possible to connect wires available on site to the outdoor unit from output side of PCB Do not connect them to the compressor at the same time otherwise it may result in i...

Page 192: ...ress FAN button 5 Press FAN ONLY button to start the power transistor test operation FTX18 24UVJU FVXS series 1 Turn the power on 2 Select FAN operation with the Mode button on the remote controller 3 Press the center of the Temp button and the Mode button at the same time 4 Select T with the Temp or Temp button 5 Press the Mode button to start the power transistor test operation OFF button R23157...

Page 193: ...emote controller 3 Press and hold Cancel button for 4 seconds or longer Test operation will stop automatically after about 30 minutes To stop the operation press On Off button 4 Select Test Operation in the service settings menu then press Menu OK button Basic screen returns and Test Operation is displayed at the bottom 5 Press On Off button within 10 seconds 3 minutes after pressing On Off button...

Page 194: ...is 0 6 5 VDC 5 Keep operation off and power off Connect the connector S70 or S71 6 Check whether 4 rotation pulses 0 15 VDC are input at the pins 4 1 when the fan motor is rotated 1 turn by hand When the fuse is melted check the outdoor fan motor for proper function If NG in step 2 Defective PCB Replace the outdoor unit PCB main PCB If NG in step 4 Defective Hall IC Replace the outdoor fan motor I...

Page 195: ... very dirty Change the installation location or direction Change the installation location or direction Clean the outdoor heat exchanger Change the installation location or direction Check the outdoor temperature The outdoor temperature should be within the operation range R21121 YES YES YES NO NO NO NO YES Is the air filter or indoor outdoor heat exchanger dirty Is the connection pipe deformed Is...

Page 196: ...erring to the table below If the resistance is or less than 1 k short circuit occurs on the main circuit 09 class R21195 YES NO NO YES Outdoor fan system is functioning Check the outdoor fan system Reconnect the connector Is the outdoor fan running Fan motor lead wire connector disconnected Go to Check No 16 Positive terminal of digital multimeter 2 3 4 2 3 1 Negative terminal of digital multimete...

Page 197: ...SiUS091601EA Check Part 6 Service Diagnosis 192 12 class 15 class Multimeter R23024 R25105 1 2 3 4 Multimeter ...

Page 198: ...Check SiUS091601EA 193 Part 6 Service Diagnosis 18 24 class R24538 1 2 3 4 Multimeter ...

Page 199: ...sion on the connector Follow the procedure below to measure resistance between the terminals of the power module and the terminals of the compressor with a multimeter Evaluate the measurement results referring to the following table 09 class Positive terminal of digital multimeter Power module UVW Power module UVW Negative terminal of digital multimeter UVW Power module UVW Power module Resistance...

Page 200: ...Check SiUS091601EA 195 Part 6 Service Diagnosis 12 class 15 class R23025 Pin 24 Pin 23 U Pin 22 V Pin 21 W Pin 20 R20704 W V U DC_P1 DC_N1 ...

Page 201: ...SiUS091601EA Check Part 6 Service Diagnosis 196 18 24 class R24539 DC DC W V U ...

Page 202: ...n 1 Room 207 4 3 Jumper and Switch Settings 209 5 Field Settings for FDMQ Series 210 5 1 How to Change the Field Settings 210 5 2 Overview of Field Settings 213 5 3 MAIN SUB and Address Setting for Wireless Remote Controller 214 6 Field Settings for Outdoor Unit 217 6 1 Facility Setting cooling at low outdoor temperature 217 6 2 Drain Pan Heater 218 7 Silicone Grease on Power Transistor Diode Brid...

Page 203: ...e unit Details 1 Remove the valve caps from the liquid stop valve and the gas stop valve 2 Carry out forced cooling operation 3 After 5 to10 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 Forced Cooling Operation on page 199 for details Gas stop valve Valve cap Close Liquid stop valve Servic...

Page 204: ...met 1 The outdoor unit is not abnormal and not in the 3 minute standby mode 2 The outdoor unit is not operating Protection functions have priority over all other functions during forced cooling operation Details For FTX FVXS series With indoor unit ON OFF switch FTX09 12 15NMVJU FTX18 24UVJU R7000271 R7000272 FVXS Series R7000273 ON OFF ON OFF switch SW1 Indoor unit ON OFF switch ON OFF switch SW1...

Page 205: ...orced cooling operation will stop automatically after about 30 minutes To stop the operation press OFF button R7000274 FTX18 24UVJU FVXS Series 1 Press Mode button and select the COOL operation 2 Press On Off button to turn on the system 3 Press Temp buttons and Mode button at the same time 4 Press Temp buttons select T and press Mode button for confirmation Forced cooling operation will stop auto...

Page 206: ... at the bottom 4 Press On Off button within 10 seconds and the forced cooling operation starts Forced cooling operation will stop automatically after about 15 minutes To stop the operation press On Off button 1 Press button and select the COOL operation 2 Press button twice TEST is displayed 3 Press button within 10 seconds and the forced cooling operation starts Forced cooling operation will stop...

Page 207: ... highest programmable temperature 30 C 86 F Trial operation may be disabled in either operation mode depending on the room temperature After trial operation is complete set the temperature to a normal level 26 28 C 78 82 F in cooling 20 24 C 68 75 F in heating For protection the system does not start for 3 minutes after it is turned off ARC480 Series 1 Press the center of TEMP button and OFF butto...

Page 208: ...enter of Temp button and Mode button at the same time 3 Select T trial operation with Temp or Temp button 4 Press Mode button to start the trial operation 5 Press Mode button and select operation mode 6 Trial operation terminates in about 30 minutes and switches into normal mode To quit trial operation press On Off button R7000147 2 4 5 1 6 2 3 3 ...

Page 209: ...creen returns and normal operation is conducted Test operation will stop automatically after 15 30 minutes To stop the operation press On Off button Test Operation Test Operation Basic screen 1 2 3 4 5 Service Settings menu screen Press and hold Cancel button for 4 seconds or longer during backlight lit Press Menu OK button Press On Off button within 10 seconds 6 Basic screen Press and hold Cancel...

Page 210: ... and all wires are connected correctly No operation or burn damage System is properly grounded Electrical leakage Is wiring size according to specifications No operation or burn damage Is something blocking the air outlet or inlet of either the indoor or outdoor units Incomplete cooling heating function Are refrigerant piping length and additional refrigerant charge noted down The refrigerant char...

Page 211: ...r Celsius for temperature display Press TEMP button and ON TIMER buttons simultaneously for 5 seconds to change the unit of temperature display You can also change the unit of temperature display by pressing Temp and buttons simultaneously for 5 seconds ARC466 Series Press the upper side of Temp button and On button at the same time for 5 seconds to change the unit of temperature display R14477 R2...

Page 212: ...te controller at the same time 4 Select A address setting with TEMP or TEMP button 5 Press FAN button to enter the address setting mode The indoor unit operation lamp blinks for 1 minute 6 Press indoor unit ON OFF switch while the operation lamp is blinking 7 Press FAN button on the remote controller for 5 seconds to return to the normal mode Replace the remote controller if you cut a jumper unint...

Page 213: ...tionally Jumpers are necessary for electronic circuit Improper operation may occur if you cut any of them FVXS Series 1 Remove the electrical wiring box 2 Cut the address jumper JA on the printed circuit board 3 Cut the address jumper J4 in the remote controller 4 Attach the electrical wiring box as they were 5 Attach the front panel and the front grille as they were Indoor unit PCB Wireless Remot...

Page 214: ...For the location of the jumper and the switch refer to the following pages FTX18 24UVJU page 26 FVXS page 28 Jumper on indoor unit PCB Function When connected factory setting When cut JB Fan speed setting when compressor stops for thermostat OFF effective only at cooling operation Fan speed setting Remote controller setting The fan stops JC Power failure recovery function Auto restart The unit doe...

Page 215: ...ield settings can not be set from SUB remote controller Procedure BRC1E73 Wired Remote Controller a Unit No b First code No c Second code No d Mode a b c d R18831 1 Press and hold Cancel button for 4 seconds or longer Service settings menu is displayed 2 Select in the Service Settings menu and press Menu OK button Field settings screen is displayed Basic screen 1 Fan Press and hold Cancel button f...

Page 216: ...which means it can be changed When SECOND CODE NO is displayed as there is no function 6 Press Menu OK button Setting confirmation screen is displayed 7 Select and press Menu OK button Setting details are determined and field settings screen returns 8 In the case of multiple setting changes repeat 3 to 7 9 After all setting changes are completed press Cancel button twice 10 Backlight goes out and ...

Page 217: ...T button for at least 4 seconds to enter the Field Set mode 2 Select the desired Mode No with MODE button 3 Press button and select the First code No 4 Press button and select the Second code No 5 Press RESERVE button to confirm the settings 6 Press TEST button to quit the Field Set mode and to return to normal display again RESERVE button Mode No Field setting mode UP button DOWN button First cod...

Page 218: ... Code No Second Code No Description of setting 01 02 03 10 20 0 Light Approx 2 500 hrs Heavy Approx 1 250 hrs Filter cleaning sign interval used to change filter cleaning display interval according to filter contamination Longlife filter Approx 200 hrs Approx 100 hrs Standard filter 3 Display No display Filter cleaning sign used to set filter cleaning display ON OFF 11 21 7 OFF Air volume adjustme...

Page 219: ...reless remote controller with 1 indoor unit change the MAIN SUB switch of the signal receiver PCB Signal Receiver PCB Setting MAIN SUB switch Set the MAIN SUB setting switch SS1 on the signal receiver PCB to SUB Mode No First Code No Second Code No External static pressure 13 23 6 05 50 Pa 06 60 Pa 07 70 Pa 08 80 Pa 09 90 Pa 10 100 Pa 11 110 Pa 12 120 Pa 13 130 Pa 14 140 Pa 15 150 Pa Factory Setti...

Page 220: ...s to enter the field setting mode SETTING is indicated on the display 2 Press FAN button and select display setting or Each time the button is pressed the display switches between and 3 Press button and button to set the address Address can be set from 1 6 but set it to 1 3 and to same address as the receiver The receiver does not work with address 4 6 4 Press RESERVE button to confirm the setting...

Page 221: ...er and the back of the wireless remote controller Set the Unit No of the receiver and the wireless remote controller to be the equal If the settings differ the signal from the remote controller cannot be transmitted Remote Controller Indoor Unit Multiple settings Remote controller display To control other air conditions and units For other than on left Standard All items displayed Commands other t...

Page 222: ... 14 F 10 C Installing an air direction adjustment grille sold separately will further extend the operation range to 4 F 20 C In these cases the unit will stop operating if the outdoor temperature falls below 4 F 20 C restarting once the temperature rises above this level R7000285 For the location of the jumper refer to pages 34 36 38 Replace the PCB if you cut a jumper unintentionally Jumpers are ...

Page 223: ...rain Pan Heater When attaching the drain pan heater 1 Attach the drain pan heater in accordance with the installation manual included with the drain pan heater 2 Turn on SW6 1 on the PCB R7000288 PCB HEAT COOL 4 3 2 1 6 5 E D C B A ON OFF 6 5 SW6 1 2 Turn on switch 1 Screw Remove the switch cover ...

Page 224: ...ode bridge Details 1 Wipe off the old silicone grease completely 2 Apply the silicone 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 silicone grease is not appropriately ...

Page 225: ...SiUS091601EA Part 8 Appendix 220 1 Piping Diagrams 221 1 1 Indoor Unit 221 1 2 Outdoor Unit 223 2 Wiring Diagrams 226 2 1 Indoor Unit 226 2 2 Outdoor Unit 231 3 Operation Limit 236 Part 8 Appendix ...

Page 226: ...LOW FAN M FAN MOTOR 3 8 CuT REFRIGERANT FLOW COOLING HEATING THERMISTOR ON HEAT EXCH SINGLE UNION JOINT SINGLE UNION JOINT FIELD PIPING 1 4 CuT FIELD PIPING 3 8 CuT 4D091769C DISTRIBUTOR M HEADER COOLING HEATING INDOOR UNIT 1 4 CuT HEAT EXCHANGER CROSS FLOW FAN FAN MOTOR THERMISTOR ON HEAT EXCH FIELD PIPING 1 4 CuT FIELD PIPING 1 2 CuT 1 2 CuT REFRIGERANT FLOW 4D074609A 4D074608A ...

Page 227: ...uT FIELD PIPING 3 8 CuT THERMISTOR ONHEATEXCH REFRIGERANT FLOW COOLING HEATING 4D091794 INDOOR UNIT MUFFLER ASSY HEAT EXCHANGER 1 4 CuT 9 32 CuT 1 4 CuT 1 4 CuT 1 4 CuT 1 4 CuT M 1 4 CuT FAN MOTOR TURBO FAN 1 4 CuT 3 8 CuT REFRIGERANT FLOW COOLING HEATING FIELD PIPING 1 4 CuT FIELD PIPING 1 2 CuT THERMISTOR ONHEATEXCH 4D091795A C 4D112974A FDMQ12RVJU 1 4 6 4 FDMQ18RVJU FDMQ24RVJU MODEL 1 4 6 4 1 4...

Page 228: ...Piping Diagrams SiUS091601EA 223 Part 8 Appendix 1 2 Outdoor Unit RXL09QMVJU RXL12QMVJU 9 3D100008 3D100009A ...

Page 229: ...SiUS091601EA Piping Diagrams Part 8 Appendix 224 RXL15QMVJU RXL18UMVJU 3D100007 3D123368 ...

Page 230: ...Piping Diagrams SiUS091601EA 225 Part 8 Appendix RXL24UMVJU 3D107985A ...

Page 231: ...ring Diagrams Part 8 Appendix 226 Note s 2 Wiring Diagrams 2 1 Indoor Unit FTX09 12NMVJU PCB1 Control PCB PCB2 Display signal receiver PCB Refer to page 22 for Printed Circuit Board Connector Wiring Diagram 3D086429D ...

Page 232: ...ng Diagrams SiUS091601EA 227 Part 8 Appendix Note s FTX15NMVJU PCB1 Filter PCB PCB2 Control PCB PCB3 Display signal receiver PCB Refer to page 24 for Printed Circuit Board Connector Wiring Diagram 3D090199B ...

Page 233: ... Diagrams Part 8 Appendix 228 Note s FTX18 24UVJU PCB1 Control PCB PCB2 Signal receiver PCB PCB3 Display PCB PCB4 INTELLIGENT EYE sensor PCB Refer to page 26 for Printed Circuit Board Connector Wiring Diagram C 3D060942W ...

Page 234: ...1P ORG WHT 1 S42 HA S21 t RED 1 ORG S49 S48 M YLW M1S PNK R1T BLU 6 PCB1 S41 RED 1 t ORG M YLW S32 M2S PNK BLU R2T 5 INDOOR WIRELESS REMOTE CONTROLLER SIGNAL RECEIVER TRANSMISSION CIRCUIT NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN F1U F2U H1P H2P M1F M1S M2S PCB1 PCB4 R1T R2T S1 S49 S1W S2W 4 S4W X1M E3 E4 PROTECTIVE GROUND FUSE PIL...

Page 235: ...SiUS091601EA Wiring Diagrams Part 8 Appendix 230 Note s FDMQ12 18 24RVJU A1P Control PCB A2P Indoor fan PCB Refer to page 30 for Printed Circuit Board Connector Wiring Diagram 3D112629A ...

Page 236: ...Wiring Diagrams SiUS091601EA 231 Part 8 Appendix Note s 2 2 Outdoor Unit RXL09QMVJU PCB1 Main PCB Refer to page 34 for Printed Circuit Board Connector Wiring Diagram C 3D099947 ...

Page 237: ...SiUS091601EA Wiring Diagrams Part 8 Appendix 232 Note s RXL12QMVJU PCB Main PCB Refer to page 36 for Printed Circuit Board Connector Wiring Diagram C 3D099948 ...

Page 238: ...Wiring Diagrams SiUS091601EA 233 Part 8 Appendix Note s RXL12QMVJU9 PCB Main PCB Refer to page 36 for Printed Circuit Board Connector Wiring Diagram C 3D122861 ...

Page 239: ...SiUS091601EA Wiring Diagrams Part 8 Appendix 234 Note s RXL15QMVJU PCB Main PCB Refer to page 38 for Printed Circuit Board Connector Wiring Diagram C 3D099952 ...

Page 240: ...Wiring Diagrams SiUS091601EA 235 Part 8 Appendix Note s RXL18 24UMVJU PCB1 Main PCB PCB2 Service monitor PCB Refer to page 39 for Printed Circuit Board Connector Wiring Diagram C 3D122866 ...

Page 241: ...SiUS091601EA Operation Limit Part 8 Appendix 236 3 Operation Limit RXL09 12 15QMVJU RXL12QMVJU9 RXL18 24UMVJU 3D100732 3D123451 ...

Page 242: ...ocal legislation z z Ask a qualified installer or contractor to install this product Do not try to install the product yourself Improper installation can result in water or refrigerant leakage electrical shock fire or explosion z z Use only those parts and accessories supplied or specified by Daikin Ask a qualified installer or contractor to install those parts and accessories Use of unauthorized ...

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