Daikin FT25CV1A, Service Manual

Page 1: ...Si01 406 SPLIT Pair C Series Applied Models z z z zNon Inverter Pair Cooling Only z z z zNon Inverter Pair Heat Pump...

Page 2: ...Pair Non Inverter Pair Non Inverter Pair C Series C Series C Series C Series zCooling Only Indoor Unit FT25CV1A FT35CV1A FT50CV1A FT60CV1A Outdoor Unit R25CV1A R35CV1A R50CV1A R60CV1A zHeat Pump Indo...

Page 3: ...o Swing 25 1 6 Signal Receiving Sign 26 1 7 ON OFF Button on Indoor Unit 26 1 8 Filters 26 1 9 Night Set Mode 27 1 10 Powerful Operation 27 1 11 3 minutes Standby Function 27 1 12 Auto restart Functio...

Page 4: ...on 83 3 Service Check Function 84 3 1 ARC423 Series Remote Controller 84 3 2 ARC433 Series Remote Controller 85 4 Troubleshooting 86 4 1 Error Codes 86 4 2 Indoor Unit PCB Abnormality 87 4 3 Freeze up...

Page 5: ...g 143 1 7 Removal of Fan Rotor Fan Motor 144 2 FT50 60CV1A 148 2 1 Removal of Air Filter Front Panel 148 2 2 Removal of Front Grille 151 2 3 Removal of Horizontal Blades Vertical Blades 153 2 4 Remova...

Page 6: ...Si01 406 Table of Contents v 2 Wiring Diagrams 190 2 1 Indoor Units 190 2 2 Outdoor Units 191 Index i Drawings Flow Charts v...

Page 7: ...Si01 406 vi Table of Contents...

Page 8: ...lug socket before disassembling the equipment for a repair Working on the equipment that is connected to a power supply can cause an electrical shook If it is necessary to supply power to the equipmen...

Page 9: ...he applicable model and appropriate tools to conduct repair work Never attempt to modify the equipment The use of inappropriate parts or tools can cause an electrical shock excessive heat generation o...

Page 10: ...be located and the repair work must be stopped be sure to perform pump down and close the service valve to prevent the refrigerant gas from leaking into the room The refrigerant gas itself is harmless...

Page 11: ...nd repair it if the equipment is not properly grounded Improper grounding can cause an electrical shock Be sure to measure the insulation resistance after the repair and make sure that the resistance...

Page 12: ...Si01 406 List of Function 1 Part 1 Part 1 Part 1 Part 1 List of Function List of Function List of Function List of Function 1 Functions 2...

Page 13: ...bility Durability Auto Restart after Power Failure 3 D Airflow Self Diagnosis Digital LED Display Comfort Airflow Mode 3 Step Airflow H P Only Wiring Error Check Comfort Control Auto Fan Speed Anticor...

Page 14: ...art after Power Failure 3 D Airflow Self Diagnosis Digital LED Display Comfort Airflow Mode Wiring Error Check 3 Step Airflow H P Only Anticorrosion Treatment of Outdoor Heat Exchanger Comfort Control...

Page 15: ...Functions Si01 406 4 List of Function...

Page 16: ...Si01 406 Specifications 5 Part 2 Part 2 Part 2 Part 2 Specifications Specifications Specifications Specifications 1 Specifications 6...

Page 17: ...51 45 47 51 Power Factor 93 0 92 9 92 3 93 0 92 9 92 3 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 273 784 195 273 784 195 Packaged Dimensions H W D mm 258 834...

Page 18: ...97 4 97 8 98 7 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 290 1 050 238 290 1 050 238 Packaged Dimensions H W D mm 337 1 147 366 337 1 147 366 Weight kg 12 12...

Page 19: ...er Consumption W 37 40 43 37 40 43 37 40 43 37 40 43 Power Factor 98 9 96 6 99 5 98 9 96 6 99 5 98 9 96 6 99 5 98 9 96 6 99 5 Temperature Control Microcomputer Control Microcomputer Control Dimensions...

Page 20: ...ooling Heating Cooling Heating Capacity kW 2 5 3 4 3 5 4 2 Running Current A 5 1 5 6 7 4 7 3 Power Consumption W 960 1 090 1 485 1 500 COP W W 2 60 3 12 2 36 2 80 Standard Cooling Heating Piping Lengt...

Page 21: ...Specifications Si01 406 10 Specifications...

Page 22: ...Board Printed Circuit Board Printed Circuit Board Printed Circuit Board Connector Wiring Diagram Connector Wiring Diagram Connector Wiring Diagram Connector Wiring Diagram 1 Printed Circuit Board Con...

Page 23: ...tor Hall IC 4 S21 Connector for centralized control HA 5 S26 Connector for signal receiver PCB 6 S27 Connector for control PCB 7 S32 Connector for heat exchanger thermistor 1 V1 V2 V3 Varistor 2 JA Ad...

Page 24: ...ctor Wiring Diagram Printed Circuit Board Connector Wiring Diagram 13 Control PCB Signal Receiver PCB SW7 LED1 LED2 RTH1 S27 S7 5V Check S6 12V Check V1 S21 FU2 V2 V3 2P058891L Control PCB Signal rece...

Page 25: ...ector for buzzer PCB 5 S27 S29 Connector for control PCB 6 S28 Connector for signal receiver PCB 7 S32 Connector for heat exchanger thermistor 8 S38 Connector for display PCB 1 V1 V2 V3 Varistor 2 JA...

Page 26: ...ram Printed Circuit Board Connector Wiring Diagram 15 PCB Detail PCB 1 Control PCB PCB 2 Signal Receiver PCB PCB 3 Buzzer PCB PCB 4 Display PCB S1 V1 V2 V3 FU1 S6 S26 C 2P099167 S28 S32 JC JB JA S21 S...

Page 27: ...4 S21 Connector for centralized control HA 5 S26 Connector for signal receiver PCB 6 S27 Connector for control PCB 7 S32 Connector for heat exchanger thermistor 1 V1 Varistor 2 JA Address setting jump...

Page 28: ...uit Board Connector Wiring Diagram Printed Circuit Board Connector Wiring Diagram 17 Control PCB Signal Receiver PCB FU1 S1 SW7 Signal receiver PCB LED1 LED2 S27 RTH1 S7 S6 S26 S32 JC JB JA Control PC...

Page 29: ...e 3 15A 3 FU2 Fuse 20A Outline of PCB 1 S10 Connector for PCB 2 2 S11 Connector for PCB 1 filter PCB 3 S45 Connector for terminal board 4 S70 Connector for fan motor 5 S80 Connector for four way valve...

Page 30: ...Circuit Board Connector Wiring Diagram Printed Circuit Board Connector Wiring Diagram 19 Detail of PCB 1 Detail of PCB 2 Connect to S11 on PCB 2 C 3P100242 1B FU2 S10 V3 V2 C 2P100238 7F S11 S70 S80 S...

Page 31: ...Printed Circuit Board Connector Wiring Diagram Si01 406 20 Printed Circuit Board Connector Wiring Diagram...

Page 32: ...at Pump Models 29 2 1 Frequency Principle 29 2 2 Power Airflow Dual Flaps Wide Angle Louvers and Auto Swing 31 2 3 Fan Speed Control for Indoor Units 32 2 4 Programme Dry Function 33 2 5 Automatic Ope...

Page 33: ...s within the differential range even after a lapse of 5 minutes the compressor is forced to turn ON point c When the suction temperature is still in the differential range after another 4 minutes of c...

Page 34: ...process from the beginning 1 Dry operation activating compressor ON temperature 2 Room temperature difference between activation and suspension of dry operation Programme dry operating condition Note...

Page 35: ...ooling operation or LL tap in dry operation Note that this function is not activated for 6 minutes after compressor turns ON When the indoor heat exchanger reaches 13 C the compressor and the outdoor...

Page 36: ...Mode During cooling mode the flap retracts into the indoor unit Then cool air can be blown far and pervaded all over the room Wide Angle Louvres The louvres made of elastic synthetic resin provide a...

Page 37: ...mless colorless and odorless Due to this treatment the amount of mold growth is much smaller than that of normal filters 1 8 2 Air Purifying Filter with Photocatalytic Deodorizing Function This filter...

Page 38: ...tes No higher temperature setting on programme dry or auto operation 1 10 Powerful Operation During cool and dry operation when the POWERFUL button on the remote controller is pressed the thermistor s...

Page 39: ...n be turned ON for 15 minutes in either the cool or dry mode even though the compressor is OFF on the thermostat This is done by setting the test mode from the remote controller After trial operation...

Page 40: ...nciple Drawing of Inverter The following drawing shows a schematic view of the inverter principle Phase Description 1 The supplied AC power source is converted into the DC power source for the present...

Page 41: ...ible to air condition with a small room temperature variation Energy saving heating and cooling Once the set temperature is reached the energy saving operation enables to maintain the room temperature...

Page 42: ...ds The flap presses the warm air above the floor to reach the entire room Cooling Mode During cooling mode the flap retracts into the indoor unit Then cool air can be blown far and pervaded all over t...

Page 43: ...automatic Note 1 During powerful operation fan operate H tap 50 90 rpm 2 Fan stops during defrost operation Air Flow Rate Control for Heating The following drawing explains the principle for fan speed...

Page 44: ...rature set by the microcomputer is divided into two zones Then the unit operates in the dry mode with an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable le...

Page 45: ...ontroller setting temperature plus correction value correction value cooling 0 deg heating 2 deg 3 Operation ON OFF point and mode switching point are as follows Heating Cooling switching point Room t...

Page 46: ...The Night Set circuit continues heating or cooling the room at the set temperature for the first one hour then automatically raises the temperature setting slightly in the case of heating or lowers i...

Page 47: ...nty minutes Ex Powerful operation in cooling mode Operation mode Fan speed Target set temperature Cooling H tap 90 rpm 18 C Dry Dry rotating speed 50 rpm Normally targeted temperature in dry operation...

Page 48: ...filter incorporates the benefits the Air Purifying Filter and Photocatalytic Deodorizing Filter in a single unit Combining the two filters in this way increases the active surface area of the new fil...

Page 49: ...xchanger Thermistor DCN 1 The indoor heat exchanger thermistor is used to prevent freezing During the cooling operation if the temperature drops abnormally the operating frequency becomes lower then t...

Page 50: ...Detail Heat pump model There are following modes stop cooling includes drying heating include defrosting Note Unless specified otherwise an indoor dry operation command must be regarded as cooling ope...

Page 51: ...3 Forced cooling 1 4 Indoor frequency command 2 Determine upper limit frequency Set a minimum value as an upper limit frequency among the frequency upper limits of the following functions Compressor...

Page 52: ...y up and down according to the D value obtaining the fixed D value When the D value is small lower the frequency When the D value is large increase the frequency 3 Limit of frequency variation width W...

Page 53: ...e the coil for 160 sec after unit operation is stopped 3 3 3 Four Way Valve Activating Guarantee Outline Heat Pump Only At the beginning of the operation as the four way valve is switched acquire the...

Page 54: ...hout change In the unchanged zone the frequency limit will remain In the return reset zone the frequency limit will be cancelled Limitation of current drooping and stop value according to the outdoor...

Page 55: ...at exchange intermediate temperature of indoor unit controls the following 3 7 Fan Control Outline Fan control is carried out according to the following priority 1 Fan ON control for electric componen...

Page 56: ...re under the simultaneous condition with OR the lower limit of frequency at the first step control is cancelled 2 At the second step During operation of compressors Outdoor temperature DOA3CG If and a...

Page 57: ...ng cycle reverse cycle The defrosting time or outdoor heat exchanger temperature must be more than its fixed value when finishing Detail Conditions for Starting Defrost The starting conditions must be...

Page 58: ...With the conventional function a power consumption is weak comparing with that in the normal operation when gas is insufficient and gas insufficiency is detected by checking a power consumption Detai...

Page 59: ...allowing conditions 1 The outdoor unit is not abnormal and not in the 3 minute stand by mode 2 The operating mode of the outdoor unit is the stop mode 3 The forced operation is ON The forced operation...

Page 60: ...on 1 System Configuration 50 2 Instructions 51 2 1 Manual Contents by Models 51 2 2 Safety Precautions 52 2 3 Names of Parts 54 2 4 Preparation before Operation 63 2 5 AUTO DRY COOL HEAT FAN Operation...

Page 61: ...er method of using it In order to meet this expectation of the users giving sufficient explanations taking enough time can be said to reduce about 80 of the requests for servicing However good the ins...

Page 62: ...Heat Pump Models FT25 35CV1A FT50 60CV1A FTY25 35CVMA Read before Operation Safety Precautions 52 52 52 Names of Parts 54 57 60 Preparation before Operation 63 63 63 Operation AUTO DRY COOL HEAT FAN O...

Page 63: ...nt check the content of the repairs with our service staff Do not attempt to install the air conditioner by your self Incorrect work will result in water leakage electric shocks or fire For installati...

Page 64: ...e Incomplete draining may cause wetting of the building furniture etc Do not operate the air conditioner with wet hands Do not wash the indoor unit with excessive water only use a slightly wet cloth D...

Page 65: ...Instructions Si01 406 54 System Configuration 2 3 Names of Parts FT25 35CV1A Names of parts Indoor Unit 1 3 4 5 6 8 9 10 2 ON OFF 13 14 7 11 12...

Page 66: ...top it The operation mode refers to the following table This switch is useful when the remote controller is missing 12 OPERATION lamp green 13 TIMER lamp Yellow 14 Signal receiver It receives signals...

Page 67: ...ton It changes the temperature setting 5 ON OFF button Press this button once to start operation Press once again to stop it 6 MODE selector button It selects the operation mode DRY COOL FAN 7 FAN set...

Page 68: ...Si01 406 Instructions System Configuration 57 FT50 60CV1A Names of parts Indoor Unit Main unit control panel 6 12 10 11 4 3 1 2 8 9 7 5 14 13...

Page 69: ...mote controller is missing 13 Room temperature sensor It senses the air temperature around the unit 14 Signal receiver It receives signals from the remote controller When the unit receives a signal yo...

Page 70: ...nges the temperature setting 5 ON OFF button Press this button once to start operation Press once again to stop it 6 MODE selector button It selects the operation mode DRY COOL FAN 7 FAN setting butto...

Page 71: ...Instructions Si01 406 60 System Configuration FTY25 35CVMA Names of parts Indoor Unit 1 3 4 5 6 8 9 10 2 ON OFF 13 14 7 11 12...

Page 72: ...top it The operation mode refers to the following table This switch is useful when the remote controller is missing 12 OPERATION lamp green 13 TIMER lamp Yellow 14 Signal receiver It receives signals...

Page 73: ...s the temperature setting 5 ON OFF button Press this button once to start operation Press once again to stop it 6 MODE selector button It selects the operation mode AUTO DRY COOL HEAT FAN 7 FAN settin...

Page 74: ...e type and replace the two old batteries together When the system is not used for a long time take the batteries out We recommend replacing once a year although if the remote controller display begins...

Page 75: ...ach the unit 2 Fix the holder to a wall a pillar etc with the screws supplied with the holder 3 Place the remote controller in the remote controller holder ATTENTION About remote controller Never expo...

Page 76: ...en while it is not operating If you are not going to use the air conditioner for a long period for example in spring or autumn turn the breaker OFF Use the air conditioner in the following conditions...

Page 77: ...g of the button advances the mode setting in sequence AUTO DRY COOL HEAT FAN 2 Press ON OFF button The OPERATION lamp lights up To stop operation 3 Press ON OFF button again Then OPERATION lamp goes o...

Page 78: ...ng operation frost may occur on the outdoor unit and lower the heating capacity In that case the system switches into defrosting operation to take away the frost During defrosting operation hot air do...

Page 79: ...on the left side and the right side blades Notes on flaps and louvers angles When SWING button is selected the flaps swinging range depends on the operation mode See the figure ATTENTION Always use a...

Page 80: ...UL operation there are some functions which are not available is displayed on the LCD To cancel POWERFUL operation 2 Press POWERFUL button again NOTE Notes on POWERFUL operation In COOL and HEAT mode...

Page 81: ...ges the setting rapidly 3 Press OFF TIMER button again The TIMER lamp lights up To cancel the OFF TIMER operation 4 Press CANCEL button The TIMER lamp goes off Notes When TIMER is set the present time...

Page 82: ...tting rapidly 3 Press ON TIMER button again The TIMER lamp lights up To cancel ON TIMER operation 4 Press CANCEL button The TIMER lamp goes off To combine ON TIMER and OFF TIMER A sample setting for c...

Page 83: ...e front grille Set the 3 keys of the front grille into the slots and push them in all the way Close the front grille slowly and push the grille at the 3 points 1 on each sides and 1 in the middle Chec...

Page 84: ...th neutral detergent thinned with lukewarm water then dry them up in the shade It is recommended to clean the air filters every two weeks Air purifying filter with photocatalytic deodorizing function...

Page 85: ...f the indoor unit and the outdoor unit Check that the drain comes smoothly out of the drain hose during COOL or DRY operation If no drain water is seen water may be leaking from the indoor unit Stop o...

Page 86: ...dry it with cloth dry it up in the shade after washing 4 Attach the front grille Align the rotation dowels on the left and right of the front panel with the slots then push them all the way in Close t...

Page 87: ...ust does not come off easily wash them with neutral detergent thinned with lukewarm water then dry them up in the shade It is recommended to clean the air filters every two weeks Air purifying filter...

Page 88: ...at nothing blocks the air inlets and the outlets of the indoor unit and the outdoor unit Check that the drain comes smoothly out of the drain hose during COOL or DRY operation If no drain water is see...

Page 89: ...r steam when the air conditioner is in defrost operation In COOL or DRY mode Moisture in the air condenses into water on the cool surface of outdoor unit piping and drips Mists come out of the indoor...

Page 90: ...indows and doors closed Are the air flow rate and the air direction set appropriately Operation stops suddenly OPERATION lamp flashes Are the air filters clean Is there anything to block the air inlet...

Page 91: ...mance It is recommended to have periodical maintenance by a specialist aside from regular cleaning by the user For specialist maintenance contact the service shop where you bought the air conditioner...

Page 92: ...ssor Lock 97 4 10 Input Over Current Detection 98 4 11 Four Way Valve Abnormality 99 4 12 High Pressure Control in Cooling 101 4 13 CT or Related Abnormality 103 4 14 Thermistor or Related Abnormality...

Page 93: ...When a signal transmission error occurs between the indoor and outdoor units In either case conduct the diagnostic procedure described in the following pages FT25 35CV1A FTY25 35CVMA FT50 60CV1A LED...

Page 94: ...cannot be used when the outdoor air temperature is below 10 C 19 4 C for cooling only model Diagnosis with remote controller indication 86 Equipment operates but does not cool or does not heat only fo...

Page 95: ...MPM TEMP ON OFF MODE ON OFF TIMER FAN SWING CANCEL Transmitter It sends signals to the indoor unit ON OFF button Press it once to start operation To stop it press it once again CLOCK button TIMER CANC...

Page 96: ...the sequence shown below and notifies with a long beep Note 1 A short beep and two consecutive beeps indicate non corresponding codes 2 To cancel the code display hold the timer cancel button down for...

Page 97: ...91 C4 Heat exchanger thermistor abnormality 93 C9 Room temperature thermistor abnormality 93 Indoor unit PCB abnormality 94 Outdoor Unit E5 OL activation compressor overload 96 E6 Compressor lock 97...

Page 98: ...zero cross detection in approximately 10 continuous seconds Supposed Causes Faulty indoor unit PCB Faulty connector connection Troubleshooting Note Connector Nos vary depending on models Connector con...

Page 99: ...according to the temperature detected by the indoor unit heat exchanger thermistor Malfunction Decision Conditions High pressure control During heating operations the temperature detected by the indoo...

Page 100: ...ulation on the indoor unit heat exchanger YES YES Is there any short circuit Is it very dirty Is it very dirty Does it conform to the thermistor characteristic chart NO Provide sufficient air passage...

Page 101: ...or Detection error due to faulty indoor unit PCB Troubleshooting Check No 16 Refer to P 122 Rotate the fan by hand Check No 16 Check Hall IC Operate the fan Does it rotate NO Does it rotate smoothly I...

Page 102: ...peration Malfunction Decision Conditions When the detected rotation speed is less than 50 of the H tap under maximum fan motor rotation demand Supposed Causes Operation halt due to short circuit insid...

Page 103: ...No 01 Check output of fan motor connector Is motor power voltage DC 200V generated Is motor control power voltage DC 15V generated Turn off power supply and disconnect fan motor connector then turn p...

Page 104: ...than 120 ohms or below about 50 C more than 1 860 kohms Note The values vary slightly in some models Supposed Causes Faulty connector connection Faulty thermistor Faulty PCB Troubleshooting Check No...

Page 105: ...tion due to an external factor Noise Momentary voltage drop Momentary power failure etc Faulty indoor unit PCB Troubleshooting Turn on the power again YES Replace the indoor unit PCB Provide proper gr...

Page 106: ...nal transmission error due to breaking of wire in the connection wires between the indoor and outdoor units wire No 2 Troubleshooting Check No 10 Refer to P 119 Check the outdoor unit s LED A Check th...

Page 107: ...not specified Supposed Causes Refrigerant shortage Four way valve malfunctioning Outdoor unit PCB defective Water mixed in the local piping Stop valve defective Troubleshooting Check No 5 Refer to P...

Page 108: ...tdoor unit PCB Startup error due to closed stop valve Detection error due to faulty outdoor unit PCB Troubleshooting Check No 13 Refer to P 121 Check No 17 Refer to P 123 Check No 18 Refer to P 124 Ch...

Page 109: ...model doesn t have SPM replace the outdoor unit PCB Replace the outdoor unit PCB Inverter checker Part No 1225477 Correct the power supply or replace the SPM Replace the outdoor unit PCB R2952 Cautio...

Page 110: ...ked to see if they function within their normal ranges in the operating mode Malfunction Decision Conditions A following condition continues over 10 minute after operating 5 minutes Cooling dry operat...

Page 111: ...wer switch before connect or disconnect connector or parts damage may be occurred Four way valve coil disconnected loose YES YES NO Functioning NO Check No 11 Check the refrigerant line Malfunctioning...

Page 112: ...he temperature being sensed by the heat exchanger thermistor exceeds the limit Malfunction Decision Conditions Activated when the temperature being sensed by the heat exchanger thermistor rises above...

Page 113: ...damage may be occurred Replace the fan motor Repair the connector or fan motor lead wires Replace the heat exchanger thermistor Replace PCB Change the air outlet grille position Change the installati...

Page 114: ...sion Conditions The compressor running frequency is below 62 Hz and the CT input is below 0 1 V The input current is also below 0 5 A If this error repeats 4 times the system will be shut down The err...

Page 115: ...n Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Running current as shown at right with relay cable 1 or 2 YES Current guideline 2 sec Time Ris...

Page 116: ...n This type of error is detected by checking the thermistor input voltage to the microcomputer A thermistor error is detected by checking the temperature Malfunction Decision Conditions The thermistor...

Page 117: ...thermistor Replace the following thermistor l Indoor heat exchanger thermistor Replace the outdoor unit PCB Replace the indoor unit PCB R3074 Caution Be sure to turn off power switch before connect or...

Page 118: ...king the radiation fin thermistor with the compressor off Malfunction Decision Conditions With the compressor off the radiation fin temperature is above 122 C Reset is made when the temperature drops...

Page 119: ...on Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Error again or outdoor unit fan activated YES l Fin thermistor NO Slightly dirty Check No 9 C...

Page 120: ...radiation fin temperature with the compressor on is above 81 C If a radiation fin temperature rise takes place 4 times successively the system will be shut down The error counter will reset itself if...

Page 121: ...r the power transistor Replace the fan motor Correct the connectors and fan motor leads Replace the outdoor unit PCB Clean up the radiation fin R2954 Caution Be sure to turn off power switch before co...

Page 122: ...is running An output over current input is fed from the output over current detection circuit to the microcomputer The system will be shut down if the error occurs 16 times Clearing condition Continu...

Page 123: ...ve been disconnected and reconnected for part replacement for example and the system is interrupted by an output over current take the following procedure Error again NO YES NO YES Voltage as rated YE...

Page 124: ...temperature as well as the difference between outdoor unit heat exchanger temperature and room temperature Malfunction Decision Conditions Gas shortage detection I Input current 1400 256 A Hz Compres...

Page 125: ...it heat exchanger thermistor 1 Replace the PCB 2 Replace the compressor Procedure complete R3075 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be...

Page 126: ...sed Unused P 0V reference potential Motor control voltage 15 VDC Rotation command voltage 1 6 VDC Rotation pulse input S1 R3199 Turn off the power and turn it on again Start the heating mode run Repla...

Page 127: ...on the PCB and measure the resistance of each thermistor using tester The relationship between normal temperature and resistance is shown in the graph and the table below Thermistor R25 C 20k B 3950...

Page 128: ...Change the installation location or direction Check the outside air temperature temperature of air taken in by the outdoor unit The outside air temperature shall be 43 C or lower Check the allowable...

Page 129: ...Discharge pressure check Replace compessor Open the stop valve Replace the pipe installed at the site Clean Replace the compressor R3049 Not dirty YES YES Dirty NO NO NO Are the heat exchanger and air...

Page 130: ...outdoor unit fan system Reconnect R2857 Outdoor unit fan running YES Fan motor lead wire connector disconnected YES NO NO Outdoor unit fan system functioning Go to Check No 15 Check the fan motor lea...

Page 131: ...during measurement to prevent electric shock Measuring positions Take measurements at the power transistor and terminals in the same way as described in section 1 Set the multi tester to DC and VOLTA...

Page 132: ...nd the U V and W terminals of the compressor connector with a multi tester Evaluate the measurement results for a pass fail judgment Power transistor check Measuring positions Negative terminal of tes...

Page 133: ...ON operation OFF and the connector connected check the following Output voltage of about 5 V between pins 1 and 3 Generation of 3 pulses between pins 2 and 3 when the fan motor is operating Failure o...

Page 134: ...from the terminals Measure the output voltage of the red yellow and blue wires using a tester 1 Conduct forced cooling operation with the equipment in the condition shown in Fig 1 2 Measure the volta...

Page 135: ...or refrigerant system check Faulty compressor Replace the compressor To next step R1967 YES NO Does the equipment stop frequency due to startup error Check if there are any damage on refrigerant pipin...

Page 136: ...r Filter Front Panel 148 2 2 Removal of Front Grille 151 2 3 Removal of Horizontal Blades Vertical Blades 153 2 4 Removal of Electrical Parts Box PCB Swing Motor 155 2 5 Removal of Heat Exchanger 160...

Page 137: ...seconds a forced cooling operation will be carried out for approx 15 minutes When the signal receiver catches a signal from the remote controller it produces beep sound and the operation lamp blinks 2...

Page 138: ...t provided on the both sides of the unit s panel and open up the panel to the position higher than it will stop Support the front panel by one hand while remove the rotation axis at the upper center b...

Page 139: ...5 35CV1A FTY25 35CVMA Si01 406 128 Removal Procedure 3 When restoring the air filter make sure that the projection parts on the panel are in the guide groove and then shut the panel Step Procedure Poi...

Page 140: ...ocedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the service cover 1 Remove a service cover mounting scr...

Page 141: ...equipped in the existing models are not provided 2 Disengage the two hooks on the upper part In case that the hooks are not pressed from above remove the front panel and then remove the grille while...

Page 142: ...5CVMA Removal Procedure 131 3 The front grille can be removed in a manner to pull out the upper part forward and lift up the lower part When restoring the grille Make sure whether each hook is set as...

Page 143: ...after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the horizontal blades 1 Lift horizontal blade to open position Screw stoppers inside the flap which were...

Page 144: ...e of the blade to the tip while rotating it 2 Restore the two fixed parts of the horizontal blade onto the hook 2 Remove the vertical blades 1 Disengage the vertical blade s joint from the fixed plate...

Page 145: ...disassembling work Step Procedure Points Remove the front grill 1 Remove the electrical parts box 1 Disconnect the connection wires 2 Disconnect the connectors of fan motor S1 and S7 Pay attention to...

Page 146: ...TY25 35CVMA Removal Procedure 135 5 Remove a screw on the terminal strip The electrical parts box can be removed instead of disengaging the terminal strip 6 Remove a screw on the electrical parts box...

Page 147: ...FT25 35CV1A FTY25 35CVMA Si01 406 136 Removal Procedure 7 Pull up the electrical parts box forward to remove A hook is provided on the behind Step Procedure Points...

Page 148: ...nted circuit board PCB 1 Remove the shelter 2 Disengage the front plate of the electrical parts box Disengage the knobs by pushing the two hooks at the top and the bottom 3 Sliding to the left the fro...

Page 149: ...FT25 35CV1A FTY25 35CVMA Si01 406 138 Removal Procedure 4 Disengage the four knobs on the back of the signal receiver PCB 5 Signal receiver PCB Step Procedure Points...

Page 150: ...egrated with the power supply printed circuit board 3 Remove the swing motor assembly 1 To remove swing motor assembly remove two screws Manual adjusting for the vertical blades Provide a supporter so...

Page 151: ...R22 into refrigerating cycle Mixing of air or other gas causes abnormal temperature rise in refrigerating cycle and this results in pipe rupture or personal injuries Pay attention so that the residual...

Page 152: ...ard to an angle of 10 to 20 degrees Be careful to prevent pipe deformation 6 Disengage hooks located right and left side and pull heat exchanger forward The hooks are symmetrically placed in the right...

Page 153: ...01 406 142 Removal Procedure 7 Lift and remove heat exchanger Caution When removing or re installing heat exchanger be sure to wear protective gloves or wrap heat exchanger with cloths Fins can cut fi...

Page 154: ...all power supplies before disassembling work Step Procedure Points 1 Disconnect drain hose The drain pan is integrated with the bottom plate 2 Pull out the drain plug in the left on the drain pan by...

Page 155: ...ure 1 7 Removal of Fan Rotor Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points Remove the heat exchang...

Page 156: ...Si01 406 FT25 35CV1A FTY25 35CVMA Removal Procedure 145 2 Disengage hook 3 Loosen the hexagon head set screw on the fan rotor Step Procedure Points...

Page 157: ...FT25 35CV1A FTY25 35CVMA Si01 406 146 Removal Procedure 4 Remove the motor and fan rotor 5 Remove a screw on the left side panel Step Procedure Points...

Page 158: ...Removal Procedure 147 6 Disengage a hook from the backward 7 Since the fan bearing is made of rubber push it strongly off from the inside The bearing can be removed just as the left side plate is att...

Page 159: ...efore disassembling work Step Procedure Points 1 Features When the signal receiver catches a signal from the remote controller it produces beep sound and the operation lamp blinks 2 Remove the air fil...

Page 160: ...ir filters with displaying FRONT on the front side Insert two claws of the air filter completely 3 Remove an air purifying filter with photocatalytic deodorizing function 1 Push up the bottom of an ai...

Page 161: ...While opening the front panel further than it stops release both axes and remove the front panel Slide the front panel side to side to release each axis Align the right and left axes with grooves in...

Page 162: ...ssembling work Step Procedure Points 1 Remove the service cover 1 Loosen the screw and remove the service cover by the knob No field setting switch is inside it You can remove the front grille without...

Page 163: ...ee hooks on the center and the both sides of the upper part Refer to the removal procedure in a reverse way when reassembling 3 Pull the upper part of the front grille out and lift the lower part up a...

Page 164: ...ntal blades 1 Open the horizontal blades It has no fixing screws inside blades though previous models had 2 Undo the left pivot of the horizontal blades 3 Bend the horizontal blades slightly and relea...

Page 165: ...T50 60CV1A Si01 406 154 Removal Procedure 2 Remove the vertical blades 1 Undo the right and left pivots 2 Undo the three claws 3 Pull the vertical blades rightwards and remove it Step Procedure Points...

Page 166: ...ure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the front grille Parts layout 2 Remove the drip proof plate 1 Loosen the sc...

Page 167: ...Loosen the screw and remove the terminal strip board You can remove the electrical parts box without detaching the terminal strip board Screw M4 25 2 Disconnect the connectors for fan motor S1 3 Disc...

Page 168: ...do the back claw The electrical parts box has a claw on its back 6 Pull the electrical parts box out towards you Hook the back claw of the electrical parts box when reassembling 7 Loosen the screw on...

Page 169: ...e lower side Release the claws on the upper side 10 Cut the clamp 11 The receiver units contain four PCBs Remove each PCB with releasing claws Disconnect every connector from each PCB Remove the recei...

Page 170: ...then the two claws on the upper side Remove the control PCB 2 Control PCB indoor unit S1 connector for the fan motor S21 HA S26 connector for the buzzer PCB S32 connector for the heat exchanger thermi...

Page 171: ...ding on the model into refrigerant cycle Contaminating of air or other gas causes abnormal high pressure in refrigerating cycle and this results in pipe breakage or personal injuries Pay attention so...

Page 172: ...the indoor unit from the installation plate 3 Remove the piping fixture 1 Release the claw on the upper side of the piping fixture on the back of the unit 4 Remove the heat exchanger 1 Widen the auxil...

Page 173: ...claws on the right side and release 4 Pull the heat exchanger to the front side and undo the claws completely and then lift it Caution When removing or reinstalling heat exchanger be sure to wear pro...

Page 174: ...all power supplies before disassembling work Step Procedure Points 1 Remove the right side panel 1 Loosen the two screws You can remove the fan rotor without detaching the right side panel 2 Lift the...

Page 175: ...otor and the bottom frame 2 When reassembling the fan motor align the end of the connector with the height of for play 4 Remove the bearing 1 Remove the fan rotor The bearing is on the left side 2 Loo...

Page 176: ...r can be removed when the fixed screw is removed As three hooks are provided at three portions slide the cover downward to remove The forced cooling operation in the pumping down mode can be carried o...

Page 177: ...fixed screw in the rear of the top plate Once lift the top plate and then remove it forward The left side plate and the bellmouth can be removed all at once When restoring the top plate move it horizo...

Page 178: ...oints 1 The bellmouth is attached with two screws and four hooks Remove the bellmouth beginning the front plate after removing the two screws which are set below 2 Remove the two screws and pull the b...

Page 179: ...ore after turning off all power supplies before disassembling work Step Procedure Points 1 To remove the shelter 1 Remove the three fixed screws for removing the shelter 2 Remove the shelter 2 To remo...

Page 180: ...g to restore the shelter and to avoid losing or damaging it When restoring match the mark of the propeller fan with the D cut of the motor shaft The fan should be restored so that the mark z will be a...

Page 181: ...plate 1 Remove the three screws for removing the right side plate 2 Lift the right side plate to disengage the hooks Insert the three hooks for the restoration 2 To remove the noise absorber Since the...

Page 182: ...oise absorption pad Since the slit prepared for the piping on the noise absorption pad is torn easily remove the pad carefully 3 Pull out the body of the noise absorption pad b When restoring the nois...

Page 183: ...ning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 To remove the partition plate 1 Disengage the lead wires from the wire cl...

Page 184: ...Si01 406 R25 35CV1A RY25 35CVMA Removal Procedure 173 4 When restoring the partition plate put the hook into the bottom frame Step Procedure Points...

Page 185: ...in the compressor will catch fire prepare wet cloth so as to extinguish fire quickly Warning Ventilate when refrigerant leaks during the work If refrigerant contacts fire it will cause to arise toxic...

Page 186: ...ter turning off all power supplies before disassembling work Step Procedure Points 1 To dismount the top panel remove the four mounting screws A 2 To dismount the front panel remove the six mounting s...

Page 187: ...arts Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the wire harness connectors from the PCB 2 D...

Page 188: ...is printed Do not scorch the indication with the flame of welder Also record terminal code on a memo paper in case the indication becomes illegible 4 Remove terminal cover Connect lead wires to proper...

Page 189: ...R50 60CV1A Si01 406 178 Removal Procedure 6 Remove the screw 7 Take off the electrical parts box Step Procedure Points...

Page 190: ...rigerant in the unit before disassembling WARNING If refrigerant gas leaks during servicing work ventilate the area If refrigerant gas contacts flames hazardous gas can generate When removing sound in...

Page 191: ...e 3 After disconnecting refrigerant pipes remove three washer nuts that secure compressor in place Use open end wrench to remove washer nut a located on right front side 4 Use T handle box wrench to l...

Page 192: ...Si01 406 Others 181 Part 8 Part 8 Part 8 Part 8 Others Others Others Others 1 Others 182 1 1 Test Run from the Remote Controller 182 1 2 Jumper Settings 184...

Page 193: ...h the Operation Manual to ensure that all functions and parts such as louver movement are working properly The air conditioner requires a small amount of power in its standby mode If the system is not...

Page 194: ...to ensure that all functions and parts such as louver movement are working properly The air conditioner requires a small amount of power in its standby mode If the system is not to be used for some ti...

Page 195: ...ut the jumper JA on PCB Wireless remote controller in case of wall mounted type Cut the jumper J4 1 2 2 Jumper Setting Wireless remote controller Address J4 CUT EXIST 1 2 JA ADDRESS J4 ADDRESS CUT EXI...

Page 196: ...Appendix 185 Part 9 Part 9 Part 9 Part 9 Appendix Appendix Appendix Appendix 1 Piping Diagrams 186 1 1 Indoor Units 186 1 2 Outdoor Units 187 2 Wiring Diagrams 190 2 1 Indoor Units 190 2 2 Outdoor Un...

Page 197: ...6 4CuT 7 9CuT CROSS FLOW FAN FAN MOTOR ON HEAT EXCH THERMISTOR M 7 0CuT 7 0CuT 9 5CuT HEAT EXCHANGER 7 0CuT 7 0CuT FT25 FT35 12 7 9 5 C 4D023507H INDOOR UNIT FIELD PIPING FIELD PIPING 15 9CuT 6 4CuT...

Page 198: ...EAT EXCH THERMISTOR INDOOR UNIT M 6 4CuT 7 0CuT 9 5CuT HEAT EXCHANGER REFRIGERANT FLOW HEATING COOLING 6 4CuT 6 4CuT 4D045923 9 5CuT 7 9CuT COMPRESSOR OUTDOOR UNIT PROPELLER FAN 7 9CuT 7 9CuT M HEAT E...

Page 199: ...UMULATOR 7 9CuT 12 7CuT 7 9CuT 12 7CuT WITH SERVICE PORT 6 4CuT STOP VALVE LIQUID FIELD PIPING FIELD PIPING 6 4CuT 12 7CuT 3D020877C CAPILLARY TUBE GAS STOP VALVE OUTDOOR UNIT COMPRESSOR PROPELLER FAN...

Page 200: ...2 9 5CuT COOLING HEATING 6 4CuT 6 4CuT WITH SERVICE PORT GAS STOP VALVE STOP VALVE LIQUID FIELD PIPING FIELD PIPING 6 4CuT 9 5CuT 3D019959F 9 5CuT VALVE FOUR WAY ON COOLING 7 9CuT 7 9CuT OUTDOOR UNIT...

Page 201: ...ER IS MARKED JA ON PCB1 YLW BLK WHT RED X1M 2 3 1 TO OUTDOOR UNIT 3D027406C CONTROLLER WIRELESS REMOTE PCB4 PCB3 LED1 H1P R1T t S37 S38 LED2 H2P PCB2 S27 S1W RECEIVER SIGNAL S26 S21 S29 S28 PCB1 R2T S...

Page 202: ...1 PCB2 PRINTED CIRCUIT BOARD H2 H3 H1 GRN WHT RED BLK YLW X1M 2 3 1 NOTE THAT OPERATION WILL THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK RESTART AUTOMATICALLY IF ON AGAIN CAUTION FIELD 2 3 1 WIR...

Page 203: ...X2M TERMINAL STRIP BRN C12R C11R BLU YLW WHT RED BLK RED S 3D024714B M C 1 1 M M 140 C M1F M1C 50Hz 220 240V indoor POWER SUPPLY L LIVE K1M COMPRESSOR RELAY F1S SURGE ARRESTER F1U FUSE C11R C12R RUNN...

Page 204: ...PRINTED CIRCUIT BOARD L1R REACTOR M1C COMPRESSOR MOTOR M1F FAN MOTOR FU1 FU2 FUSE C13 C15 CAPACITOR indoor C9 C10 C11 2 3 1 TFU 102 C X1M L 2 3 N 1 RED BLK WHT GRN YLW GRN YLW HN1 HL1 S E FU2 20A V2...

Page 205: ...Wiring Diagrams Si01 406 194 Appendix...

Page 206: ...unit fan system check 119 power supply waveforms check 119 power transistor check 121 power transistor output check 123 thermistor resistance check 116 compressor 174 179 compressor lock 97 compresso...

Page 207: ...J4 184 J6 105 JA 12 14 16 184 JB 12 14 16 184 JC 12 14 16 184 jumper settings 184 L L3 107 L4 109 L5 111 LED indication 82 left side plate 166 167 liquid compression protection function 1 45 liquid co...

Page 208: ...over 177 terminal strip 87 135 156 test run function 28 182 thermistor indoor heat exchanger thermistor 38 93 134 155 outdoor air thermistor 106 176 outdoor heat exchanger thermistor 38 106 176 radiat...

Page 209: ...Si01 406 iv Index...

Page 210: ...94 input current control 43 input over current detection 98 installation condition check 117 insufficient gas 113 insufficient gas control 47 inverter features 30 inverter units compressor refrigeran...

Page 211: ...rmistor or related abnormality outdoor unit 105 thermistor resistance check 116 trial operation from remote controller 182 183 W wiring diagrams FT25CV1A 190 FT35CV1A 190 FT50CV1A 190 FT60CV1A 190 FTY...

Page 212: ...3 Japan Tokyo office Shinjuku Sumitomo Bldg 6 1 Nishi Shinjuku 2 chome Shinjuku ku Tokyo 163 0235 Japan Zandvoordestraat 300 B 8400 Oostende Belgium z For further improvement specifications or designs...