Daikin FTXM-K Series Service Manual Download

Page: 26 / 138

Indoor Unit

SiBE041434E

Printed Circuit Board Connector Wiring Diagram

Signal Receiver
PCB (PCB2)

Display PCB
(PCB3)

INTELLIGENT
EYE Sensor PCB
(PCB4)

Note:

The symbols in the parenthesis are the names on the appropriate wiring diagram.

1) S48

Connector for control PCB

3P210728-1

S48

1) S49

Connector for control PCB

2) SW1 (S1W)

Forced cooling operation

ON/OFF

button

∗

Refer to page 110 for detail.

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

3P210728-1

RTH1

SW1

LED3

LED2

LED1

S49

1) S26

Connector for control PCB

3EB86013-1

S26

Summary of Contents for FTXM-K Series

Page 1: ...Service Manual Applied Models z Inverter Pair Heat Pump Inverter Pair Wall Mounted Type FTXM K Series SiBE041434E...

Page 2: ...i Table of Contents Inverter Pair Wall Mounted Type FTXM K Series zHeat Pump Indoor Unit FTXM20K3V1B FTXM25K3V1B FTXM35K3V1B FTXM42K3V1B FTXM50K3V1B Outdoor Unit RXM20LV1B RXM25LV1B RXM35LV1B RXM42LV1...

Page 3: ...ntrol for Indoor Unit 20 1 5 Program Dry Operation 21 1 6 Automatic Operation 22 1 7 Thermostat Control 23 1 8 NIGHT SET Mode 24 1 9 ECONO Operation 24 1 10 INTELLIGENT EYE Operation 20 25 Class 25 1...

Page 4: ...Compressor Overload 78 4 12 Compressor Lock 80 4 13 DC Fan Lock 81 4 14 Input Overcurrent Detection 82 4 15 Four Way Valve Abnormality 83 4 16 Discharge Pipe Temperature Control 85 4 17 High Pressure...

Page 5: ...111 4 Field Settings 112 4 1 When 2 Units are installed in 1 Room 112 4 2 Model Type Setting 112 4 3 Facility Setting cooling at low outdoor temperature 113 4 4 Jumper Settings 114 5 Silicon Grease o...

Page 6: ...Warning Do not store the equipment in a room with successive fire sources e g naked flame gas appliance electric heater Be sure to disconnect the power cable plug from the plug socket before disassemb...

Page 7: ...in the refrigerant system If air enters the refrigerating system an excessively high pressure results causing equipment damage and injury Warning Caution Do not repair the electrical components with...

Page 8: ...Fire extinguishing equipment If any hot work is to be conducted on the refrigeration equipment or any associated parts appropriate fire extinguishing equipment shall be made available at hand Prepare...

Page 9: ...es Repairs to sealed components During repairs to sealed components all electrical supplies shall be disconnected from the equipment being worked upon before the removal of any sealed covers etc If it...

Page 10: ...en into consideration The following procedure shall be adhered to Remove refrigerant Purge the circuit with inert gas Evacuate the inert gas Purge again with inert gas Carry out cutting or brazing of...

Page 11: ...ls on the equipment stating the equipment contains R 32 Refrigerant recovery When removing refrigerant from a system either for servicing or decommissioning it is recommended to conduct training so th...

Page 12: ...en the indoor and outdoor units Make the connections securely and route the cable properly so that there is no force pulling the cable at the connection terminals Improper connections may cause excess...

Page 13: ...on the window frame If the unit is not securely mounted it may fall and cause injury For unitary type only When replacing the coin battery in the remote controller be sure to dispose of the old batter...

Page 14: ...ion may cause an electrical shock Be sure to check the drainage of the indoor unit after the repair Faulty drainage may cause the water to enter the room and wet the furniture and floor Do not tilt th...

Page 15: ...tion is used when there is danger that the reader through incorrect manipulation may damage equipment lose data get an unexpected result or has to restart part of a procedure Note Note A Note provides...

Page 16: ...SiBE041434E 1 List of Functions Part 1 List of Functions 1 Functions 2...

Page 17: ...diagnosis R C LED z z 3 D airflow z Wiring error check function COMFORT AIRFLOW operation z z Anti corrosion treatment of outdoor heat exchanger z z Comfort Control Auto fan speed z z Indoor unit quie...

Page 18: ...SiBE041434E 3 Specifications Part 2 Specifications 1 Specifications 4...

Page 19: ...ovable Washable Mildew Proof Running Current Rated A 0 19 0 18 0 17 0 19 0 18 0 17 0 19 0 18 0 17 0 19 0 18 0 17 Power Consumption Rated W 40 40 40 40 Power Factor Rated 95 7 96 6 98 0 95 7 96 6 98 0...

Page 20: ...le Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 12 0 12 0 11 0 13 0 13 0 12 0 11 0 11 0 11 0 14 0 14 0 13 Power Consumption Rated W 26 26 26 28 28 28 24 24 24 30 30 30 Power...

Page 21: ...emovable Washable Mildew Proof Running Current Rated A 0 12 0 12 0 11 0 15 0 14 0 14 Power Consumption Rated W 26 26 26 32 32 32 Power Factor Rated 98 5 94 2 98 5 97 0 99 4 95 2 Temperature Control Mi...

Page 22: ...rinted Circuit Board Connector Wiring Diagram Part 3 Printed Circuit Board Connector Wiring Diagram 1 Indoor Unit 8 1 1 20 25 Class 8 1 2 35 42 50 Class 10 2 Outdoor Unit 12 2 1 20 25 35 Class 12 2 2...

Page 23: ...or PCB 3 S26 Connector for display PCB 4 S32 Connector for indoor heat exchanger thermistor 5 S200 Connector for DC fan motor 6 S403 Connector for adaptor PCB option 7 FG1 FG2 Connector for terminal b...

Page 24: ...ppropriate wiring diagram 1 S27 Connector for control PCB 2 SW1 S1W Forced cooling operation ON OFF button Refer to page 110 for detail 3 LED1 H1P LED for operation green 4 LED2 H2P LED for timer yell...

Page 25: ...control HA 3 S25 Connector for INTELLIGENT EYE sensor PCB 4 S32 Indoor heat exchanger thermistor 5 S41 Connector for swing motors 6 S46 Connector for display PCB 7 S47 Connector for signal receiver PC...

Page 26: ...riate wiring diagram 1 S48 Connector for control PCB 3P210728 1 S48 1 S49 Connector for control PCB 2 SW1 S1W Forced cooling operation ON OFF button Refer to page 110 for detail 3 LED1 H1P LED for ope...

Page 27: ...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 S100 Connector for forced operation b...

Page 28: ...no function 1 S11 Connector for main PCB 2 AC1 AC2 S Connector for terminal board 3 E1 E2 Terminal for earth wire 4 HL2 HN2 Connector for main PCB 5 HR1 Connector for reactor 6 FU1 Fuse 3 15 A 250 V...

Page 29: ...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 board 7 E1 E2 Terminal for ea...

Page 30: ...TELLIGENT EYE Operation 35 42 50 Class 26 1 12 Inverter POWERFUL Operation 28 1 13 Clock Setting 29 1 14 WEEKLY TIMER Operation 30 1 15 Other Functions 36 2 Function of Thermistor 37 3 Control Specifi...

Page 31: ...s 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 The target frequency is ada...

Page 32: ...nce the set temperature is reached the energy saving operation enables to maintain the room temperature at low power Frequency Limits The following functions regulate the minimum and maximum frequency...

Page 33: ...istributed all 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...

Page 34: ...mes 3 D airflow The horizontal and vertical swing motions are alternated and the airflow direction changes in the order shown in the following diagram 1 The louvers move from the right to the left 2 T...

Page 35: ...setting button is set to automatic Cooling The following drawing explains the principle of fan speed control for cooling The upper limit is M tap for 30 minutes from the operation start Heating In hea...

Page 36: ...emperature at start up and the target 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 le...

Page 37: ...tion mode switching point are as follows Tr means the room thermistor temperature 1 Heating Cooling switching point Tr Tt 2 5 C 20 25 class Tr Tt 3 0 C 35 42 50 class 2 Cooling Heating switching point...

Page 38: ...efrost control in any zones except A The operation turns on in any zones except A The monitoring time has passed while the temperature difference is in the zone B Cooling Dry 10 minutes Heating 10 sec...

Page 39: ...hen breaker capacity does not allow the use of multiple electrical devices and air conditioners It can be easily activated by pushing the ECONO button on the wireless remote controller Detail When thi...

Page 40: ...motions in cooling In FAN operation the fan speed is reduced by 60 rpm When the microcomputer does not have a signal from the sensor in 20 minutes it judges that nobody is in the room and operates the...

Page 41: ...unit carries out a sampling every 20 msec and if it detects 10 cycles of the wave in one second in total and when the ON signal continues 3 sec it judges human is in the room as the motion signal is O...

Page 42: ...and B Shift the airflow direction to area B left side 2 Detection signal ON in area A Shift the airflow direction to area B left side 3 Detection signal ON in area B Shift the airflow direction to are...

Page 43: ...operation in cooling Note 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 DRY Dr...

Page 44: ...o set the clock to the current day of the week 3 Press the Clock button blinks 4 Press the Select or button to adjust the clock to the present time Holding down the Select or button increases or decre...

Page 45: ...Programme 3 Programme 4 Up to 4 reservations per day and 28 reservations per week can be set using the WEEKLY TIMER The effective use of the copy mode simplifies timer programming The use of ON ON ON...

Page 46: ...use WEEKLY TIMER operation Make sure the day of the week and time are set If not set the day of the week and time The day of the week and the reservation number of the current day will be displayed 1...

Page 47: ...ION 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 wee...

Page 48: ...ation of the selected day of the week will be copied 6 00 8 30 17 30 22 00 25 C 27 C 6 00 8 30 17 30 22 00 25 C 27 C COPY Programme 1 Programme 2 Programme 3 Programme 4 ON OFF ON OFF Monday Programme...

Page 49: ...o change the confirmed reserved settings select the reservation number and press The mode is switched to setting mode Proceed to setting mode step 2 Press while is displayed on the LCD The will disapp...

Page 50: ...y of the week will be deleted 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 Pressing changes the ON O...

Page 51: ...button once to start operation Press once again to stop it The ON OFF button is useful when the remote controller is missing or the battery has run out The operation mode refers to the following tabl...

Page 52: ...ture used in place of the inner temperature of the compressor rises abnormally the operating frequency becomes lower or the operation halts 2 The discharge pipe thermistor is used for detecting discon...

Page 53: ...r 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 indoo...

Page 54: ...emperature is taken as the D signal and is used for frequency command OFF Thermostat OFF PI Control 1 P control The D value is calculated in each sampling time 20 seconds and the frequency is adjusted...

Page 55: ...arge pipe temperature C C Radiation fin temperature 90 C Control II ON condition Discharge pipe temperature D C Radiation fin temperature 85 C OFF condition Discharge pipe temperature E C Radiation fi...

Page 56: ...r resetting 4 When the compressor starts after the fault of four way valve switching The lower limit of frequency keeps A Hz for B seconds with any conditions 1 through 4 above 3 3 4 3 minute Standby...

Page 57: ...charge pipe temperature from rising further Detail 20 25 35 42 50 class A C 118 B C 108 C C 103 D C 97 E C 85 Zone Control Stop zone When the temperature reaches the stop zone the compressor stops Dro...

Page 58: ...d Dropping 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 z...

Page 59: ...ting frequency limitation is judged with the indoor heat exchanger temperature A C B C C C 20 25 class 11 9 7 35 42 50 class 9 5 7 5 5 5 R14718 Reset zone Indoor heat exchanger thermistor temperature...

Page 60: ...5 Fan speed control during forced cooling operation The outdoor fan is controlled as well as normal operation during forced cooling operation 6 Fan speed control during POWERFUL operation The rotation...

Page 61: ...e duration of the previous defrost control of accumulated time have passed since the start of the operation or ending the previous defrosting Conditions for Canceling Defrost The judgment is made with...

Page 62: ...ischarge pipe thermistor is disconnected Feedback Control Target discharge pipe temperature control Detail The followings are the examples of electronic expansion valve control which function in each...

Page 63: ...Operation Control The electronic expansion valve opening is controlled when the operation starts thus preventing superheating or liquid compression 3 11 5 Control when the Frequency Changes When the t...

Page 64: ...certained Discharge pipe temperature 6 C outdoor heat exchanger temperature 2 When the operation mode is heating When the following condition is fulfilled the discharge pipe thermistor disconnection i...

Page 65: ...mperature exceeds 120 C the system shuts down the compressor If the inverter current exceeds 9 25 10 A depending on the model the system shuts down the compressor 3 12 3 Refrigerant Shortage Detection...

Page 66: ...SiBE041434E 51 Remote Controller Part 5 Remote Controller 1 20 25 Class 52 2 35 42 50 Class 54...

Page 67: ...nce to start operation Press once again to stop it Temperature adjustment buttons AUTO DRY COOL HEAT FAN 18 30 C Not available 18 32 C 10 30 C Not available Displays the current settings In this illus...

Page 68: ...his function will prevent cold or warm air from directly blowing on your body Press this button and adjust the day and time with the Select button Press this button again to complete TIMER setting Tim...

Page 69: ...n once to start operation Press once again to stop it Temperature adjustment button AUTO DRY COOL HEAT FAN 18 30 C Not available 18 32 C 10 30 C Not available Displays the current settings In this ill...

Page 70: ...Swing button again Press this button and adjust the day and time with the Select button Press this button again to complete TIMER setting R19929 Weekly button Program button Copy button Back button N...

Page 71: ...Lock 81 4 14 Input Overcurrent Detection 82 4 15 Four Way Valve Abnormality 83 4 16 Discharge Pipe Temperature Control 85 4 17 High Pressure Control in Cooling 86 4 18 Compressor System Sensor Abnorma...

Page 72: ...mp OFF Check the outdoor temperature Heating operation cannot be used when the outdoor temperature is 24 CDB or higher and cooling operation cannot be used when the outdoor temperature is below 10 CDB...

Page 73: ...error occurs between the indoor and outdoor units In either case conduct the diagnostic procedure described in the following pages Ex 35 42 50 class Service Monitor The indoor unit has one green LED L...

Page 74: ...orresponding 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 a...

Page 75: ...same time 5C is displayed on the LCD 2 Select 5C service check with the Temp or Temp button 3 Press the Mode button to enter the service check mode The left side number blinks 4 Press the Temp or Tem...

Page 76: ...or Temp button and change the number until you hear the long beep 8 Diagnose by the sound beep The left side number does not correspond with the error code two consecutive beeps The left side number...

Page 77: ...68 C9 Room temperature thermistor or related abnormality 68 Outdoor Unit E1 Outdoor unit PCB abnormality 76 E5 OL activation compressor overload 78 E6 Compressor lock 80 E7 DC fan lock 81 E8 Input ov...

Page 78: ...ction of connectors See Note Correct the connection OK Check the power supply voltage Start operation Voltage as rated Error repeats Check the power supply voltage Start operation Voltage as rated Err...

Page 79: ...heating operation the indoor heat exchanger temperature is above 53 58 C depending on the model Supposed Causes Short circuited air Clogged air filter of the indoor unit Dust accumulation on the indo...

Page 80: ...fan motor operation Error Decision Conditions The detected rotation speed does not reach the demanded rotation speed of the target tap and is less than 50 of the maximum fan motor rotation speed Supp...

Page 81: ...around the fan Is the rotation pulse generated Rotate the fan by hand Turn the power on again Check the fan motor for breakdown or short circuit Check the motor control voltage Check the indoor unit P...

Page 82: ...reconnecting 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 su...

Page 83: ...n Supposed Causes Disconnection of connector Thermistor corresponding to the error code is defective Defective indoor unit PCB Troubleshooting Check No 01 Refer to P 97 C4 Indoor heat exchanger thermi...

Page 84: ...7 minutes Input current input voltage A output frequency B Output frequency C If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error...

Page 85: ...pe flare or replace the union Check the pipes for improper contact and correct them as required Replace the cracked pipe Check the power transistor harness for loosening Correct it as required Also re...

Page 86: ...age detection The voltage detected by the DC voltage detection circuit is below 150 180 V depending on the model The compressor stops if the error occurs and restarts automatically after 3 minute stan...

Page 87: ...upply voltage Check the connection of the compressor harness Disturbance factors Noise Power supply distortion Precaution before turning on the power again Make sure the power has been off for at leas...

Page 88: ...cked 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 Reduction of power supply vol...

Page 89: ...door 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...

Page 90: ...connected 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...

Page 91: ...e Momentary power failure Troubleshooting 20 25 35 class Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Continuously ON or OFF Blink...

Page 92: ...F 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 is grounded Is LED A blinkin...

Page 93: ...wn 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...

Page 94: ...discharge pipe 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...

Page 95: ...power Disconnect the harnesses U V and W R21163 Caution NO YES YES NO NO YES Check No 15 Check with the inverter analyzer Turn off the power and reconnect the harnesses Turn on the power again and res...

Page 96: ...tor Foreign matter stuck in the fan Defective fan motor Defective outdoor unit PCB Troubleshooting Check No 16 Refer to P 102 R20416 Caution YES YES NO YES NO NO YES NO Turn on the power Rotate the fa...

Page 97: ...o 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 ov...

Page 98: ...owing condition continues over 10 minutes after operating for 5 minutes Cooling Dry A B 5 C Heating B A 5 C A Room thermistor temperature B Indoor heat exchanger temperature If the error repeats the s...

Page 99: ...ust clogged Reconnect the thermistor s Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged R21202 Refrigerant shortage Water mixed Stop v...

Page 100: ...ctive stop valve Defective outdoor unit PCB Troubleshooting Check No 01 Refer to P 97 Check No 12 Refer to P 99 Check No 14 Refer to P 100 A C B C 1 above 50 Hz rising above 45 Hz dropping 118 85 2 39...

Page 101: ...istor Defective outdoor unit PCB Troubleshooting Check No 01 Refer to P 97 Check No 12 Refer to P 99 Check No 17 Refer to P 103 Check No 18 Refer to P 104 Check No 19 Refer to P 104 R20418 Caution Rep...

Page 102: ...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 connec...

Page 103: ...condition 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 Sup...

Page 104: ...the short circuit of the diode bridge Check No 15 Check with the inverter analyzer Turn off the power Disconnect the harnesses U V and W Turn on the power Check the electrolytic capacitor voltage Elec...

Page 105: ...on the compressor running frequency and the input current Error Decision Conditions If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other e...

Page 106: ...essor operation J3 error is judged if the discharge pipe temperature is lower than the heat exchanger temperature Supposed Causes Disconnection of the connector for the thermistor Thermistor correspon...

Page 107: ...r s of the following thermistors Outdoor temperature thermistor Discharge pipe thermistor Outdoor heat exchanger thermistor Cooling Outdoor heat exchanger temperature Heating Indoor heat exchanger tem...

Page 108: ...outdoor unit PCB Troubleshooting Check No 17 Refer to P 103 Check No 19 Refer to P 104 A C B C C C 20 25 35 class 98 75 83 42 50 class 90 64 81 Caution WARNING To cool the electrical components the ou...

Page 109: ...fter replacing the outdoor unit PCB Troubleshooting Check No 17 Refer to P 103 Check No 19 Refer to P 104 Note Refer to Silicon Grease on Power Transistor Diode Bridge on page 115 for detail A C B C 2...

Page 110: ...pressor is running A rotation speed error occurs while the compressor is running An output overcurrent signal is fed from the output overcurrent detection circuit to the microcomputer If the error rep...

Page 111: ...the same error occurs Check the power supply voltage Monitor the power supply voltage discharge and suction pressures and other factors for a long term Possible causes Momentary drop of power supply v...

Page 112: ...tor and measure the resistance The data is for reference purpose only Thermistor temperature C Resistance k Room temperature thermistor of 20 25 class models Other thermistors 20 73 4 197 8 15 57 0 14...

Page 113: ...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 connecto...

Page 114: ...o check the electronic expansion valve EV 1 Check if the EV connector is correctly connected to the PCB 2 Turn the power off and on again and check if the EV generates a latching sound 3 If the EV doe...

Page 115: ...valve coil Cooling Dry 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 S80...

Page 116: ...or drops to 10 VDC or below before carrying out the service work Reference If the terminals of the compressor are not FASTON terminals difficult to remove the wire on the terminals it is possible to c...

Page 117: ...ut frequency is low the LEDs blink slowly As the output frequency increases the LEDs blink quicker The LEDs look like they are lit 2 On completion of the inverter analyzer diagnosis be sure to re crim...

Page 118: ...main PCB If NG in step 4 Defective Hall IC Replace the outdoor fan motor If OK in both steps 2 and 4 Replace the outdoor unit PCB main PCB 5 9 Installation Condition Check Check No 17 1 2 3 4 5 6 7 32...

Page 119: ...nection pipe deformed Is the stop valve open High Replace the compressor Open the stop valve Replace the pipe installed at the site Clean the dirty air filter or indoor outdoor heat exchanger Replace...

Page 120: ...re the resistance between the pins of the DB1 referring to the table below If the resistance is or less than 1 k short circuit occurs on the main circuit 20 25 35 class 42 50 class Positive terminal o...

Page 121: ...the connector Follow the procedure below to measure resistance between the or terminal of the power module and the U V or W terminal of the compressor with a multimeter Evaluate the measurement result...

Page 122: ...Check SiBE041434E 107 Service Diagnosis 42 50 class R21204 W V U DC_P1 Power module DC_N1 Power module...

Page 123: ...own Operation 109 2 Forced Cooling Operation 110 3 Trial Operation 111 4 Field Settings 112 4 1 When 2 Units are installed in 1 Room 112 4 2 Model Type Setting 112 4 3 Facility Setting cooling at low...

Page 124: ...it 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 A...

Page 125: ...ting Start Press the forced cooling operation ON OFF button S1W on the indoor unit for 5 seconds Command frequency 20 25 35 class 58 Hz 42 50 class 30 Hz End The forced cooling operation ends when any...

Page 126: ...e 30 C 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 C 28 C in cooling 20 C 24 C...

Page 127: ...Improper operation may occur if you cut any of them Wireless Remote Controller Cut the address setting jumper Caution Replace the remote controller if you cut the jumper on the left side The heating o...

Page 128: ...lass Caution Replace the PCB if you accidentally cut a wrong jumper Jumpers are necessary for electronic circuit Improper operation may occur if you cut any of them Caution 1 If the outdoor unit is in...

Page 129: ...n Jumper When connected factory setting When cut Fan speed setting when compressor stops for thermostat OFF effective only in cooling operation JB Fan speed setting Remote controller setting The fan s...

Page 130: ...bridge Detail 1 Wipe off the old silicon grease completely 2 Apply the silicon grease evenly See the illustrations below for examples of application 3 Tighten the screws of the power transistor diode...

Page 131: ...SiBE041434E Appendix 116 Part 8 Appendix 1 Piping Diagrams 117 1 1 Indoor Unit 117 1 2 Outdoor Unit 119 2 Wiring Diagrams 120 2 1 Indoor Unit 120 2 2 Outdoor Unit 121...

Page 132: ...5 CuT 7 0 CuT 7 0 CuT 4 8 CuT Indoor unit Heat exchanger 7 0 CuT 7 0 CuT Thermistor heat exchanger Crossflow fan Fan motor M 9 5 CuT Refrigerant flow Cooling Heating Field piping 6 4 CuT Field piping...

Page 133: ...Diagrams Appendix 118 FTXM42 50K3V1B Field piping 6 4 CuT Fan motor Crossflow fan Heat exchanger Thermistor heat exchanger Refrigerant flow Cooling Heating Indoor unit Field piping 12 7 CuT 9 5 CuT 6...

Page 134: ...s stop valve with service port 3D092005 Propeller fan 4 way valve ON heating Muffler 12 7 CuT 7 9CuT 12 7 CuT M 9 5 CuT Discharge pipe thermistor Compressor 12 7 CuT 9 5 CuT Accumulator Muffler Muffle...

Page 135: ...connection of PCB4 is optional OPTION Outdoor Colours BLK WHT BRN RED GRN YLW ORG BLU Black White Brown Red Green Yellow Orange Blue Indoor Transmission circuit GRN YLW GRN GRN RED WHT BLK 3D093481 BL...

Page 136: ...ral X11A X12A X13A HA1 HL2 HR2 E1 E2 AC1 AC2 S HR1 HN2 MRCW MR30 MRM10 MRM20 S10 S11 S20 S40 S70 S80 S90 S100 S110 HL3 HN3 V1 V2 V3 Connection Magnetic relay Connector Varistor Protective earth BLK WH...

Page 137: ...Revision History Month Year Version Revised contents 02 2015 SiBE041434E First edition...

Page 138: ...es supplied or specified by Daikin Ask a qualified installer or contractor to install those parts and accessories Use of unauthorised parts and accessories or improper installation of parts and access...

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