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Daikin FTK25JVE9, Service Manual

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Daikin FTK25JVE9 Service Manual Download Page 27

General Functionality

Si04-115

18

Main Function

1. General Functionality

1.1

Functions of Thermistors

Location of 
thermistors

The thermistors on the drawing below are used to control the system. This control secures a 
proper cooling and prevents problems of the unit:

Frequency 
control

The following table shows the thermistors that control the frequency:

with 

#

: available functions and — : no available functions.

OUTDOOR UNIT

M

COOLING

HEATING

FIELD PIPING

FIELD PIPING

R1T

R2T

INDOOR UNIT

R1T

R2T

M

(R1899)

Controls

Outdoor heat 
exchanger 
thermistor

Outdoor 
ambient 
temperature 
thermistor

Indoor ambient 
temperature 
thermistor

Indoor heat 
exchanger 
thermistor

Symbol

R2T

R1T

R1T

R2T

Freeze-up prevention. 
Refer to page 19.

—

—

—

#

Peak cut off. Refer to page 
19.

—

—

—

#

Defrost. Refer to page 23.

#

#

—

#

High pressure limitation in 
heating. Refer to page 19.

#

—

—

#

Summary of Contents for FTK25JVE9

Page 1: ...Si04 115 Inverter Pair FTK X J RK X J Series Applied Models Inverter Pair Cooling Only Inverter Pair Heat Pump Service Manual...

Page 2: ...Cooling Only Indoor Unit FTK25JVE9 FTK25JVEA9 FTK25JVET9 FTK25JV1NB9 FTK35JVE9 FTK35JVEA9 FTK35JVET9 FTK35JV1NB9 Outdoor Unit RK25JVE9 RK25JVEA9 RK25JVET9 RK25JV1NB9 RK35JVE9 RK35JVEA9 RK35JVET9 RK35...

Page 3: ...Principle 21 1 4 Defrost Control 23 1 5 Forced Operation Mode 24 1 6 Wide angle Flaps Diffuser Louveres and Autoswing 25 1 7 Fan Speed Control for Indoor Units 26 1 8 Fan Speed Control for Outdoor Un...

Page 4: ...o Compressor Startup Error 76 5 12 Output Overcurrent 77 5 13 Faulty Outdoor Unit PCB 79 5 14 Faulty Outdoor Unit PCB and Transmitting Receiving Circuit 80 5 15 Operation Halt Due to Detection of Inpu...

Page 5: ...4 115 iv Table of Contents Part 9 Appendix 141 1 Piping Diagram 142 1 1 Indoor Unit 142 1 2 Outdoor Unit 143 2 Wiring Diagram 145 2 1 Indoor Unit 145 2 2 Outdoor Unit 147 Index i Drawings Flow Charts...

Page 6: ...ug 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 equipment...

Page 7: ...e 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 or...

Page 8: ...valve to prevent the refrigerant gas from leaking into the room The refrigerant gas itself is harmless but it can generate toxic gases when it contacts flames such as fan and other heaters stoves and...

Page 9: ...l shock Be sure to measure the insulation resistance after the repair and make sure that the resistance is 1 Mohm or higher Faulty insulation can cause an electrical shock Be sure to check the drainag...

Page 10: ...Si04 115 List of Function 1 Part 1 List of Function 1 Functions 2 1 1 Indoor Unit and Outdoor Unit 2...

Page 11: ...Timer Vertical Auto Swing Up and Down Worry Free Reliability Durability Auto Restart after Power Failure Horizontal Auto Swing Right and Left Self Diagnosis Digital LED Display 3 D Air flow The Remote...

Page 12: ...Si04 115 Printed Circuit Board Connector Wiring Diagram 3 Part 2 Part 2 Part 2 Part 2 Specification Specification Specification Specification 1 Specifications 4 1 1 Cooling Only 4 1 2 Heat Pump 8...

Page 13: ...ing Current Rated A 0 17 0 18 0 18 0 21 0 21 0 17 0 18 0 18 0 21 0 21 Power Consumption Rated W 37 40 43 45 48 37 40 43 45 48 Power Factor 98 9 96 6 99 5 97 4 99 4 98 9 96 6 99 5 97 4 99 4 Temperature...

Page 14: ...0 18 0 18 Power Consumption Rated W 37 40 43 37 40 43 Power Factor 98 9 96 6 99 5 98 9 96 6 99 5 Temperature Control Microcomputer Control Microcomputer Control Dimension H W D mm 273 784 185 273 784...

Page 15: ...21 Power Consumption Rated W 45 45 Power Factor 97 4 97 4 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 273 784 185 273 784 185 Packaged Dimensions mm 834 325 258...

Page 16: ...ht Left Horizontal and Downward Air Filter Removal Washable Mildew Proof Removal Washable Mildew Proof Running Current Rated A 0 18 0 18 Power Consumption Rated W 40 40 Power Factor 96 6 96 6 Temperat...

Page 17: ...0 21 0 21 Power Consumption Rated W 37 40 43 45 48 37 40 43 45 48 37 40 43 45 48 37 40 43 45 48 Power Factor 98 9 96 6 99 5 97 4 99 4 98 9 96 6 99 5 97 4 99 4 98 9 96 6 99 5 97 4 99 4 98 9 96 6 99 5 9...

Page 18: ...Factor 97 4 97 4 97 4 97 4 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 273 784 185 273 784 185 Packaged Dimensions mm 834 325 258 834 325 258 Weight kg 7 5 7 5...

Page 19: ...and Auto Air Direction Control Right Left Horizontal and Downward Right Left Horizontal and Downward Air Filter Removal Washable Mildew Proof Removal Washable Mildew Proof Running Current Rated A 0 1...

Page 20: ...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 Connector...

Page 21: ...or fan motor 2 S6 Connector for swing motor Horizontal Flap 3 S7 Connector for fan motor 4 S21 Connector for centralized control to 5 rooms 5 S27 S36 Connector for control PCB 6 S26 Connector for sign...

Page 22: ...Name Printed Circuit Board Connector Wiring Diagram 13 Control PCB 1 R1895 Control P C B 1 S1 Signal receive P C B 2 S27 GRN GRN YLW LED1 LED2 LED3 SW7 S7 S6 Intelligent eye sensor P C B 3 S36 S35 S2...

Page 23: ...Printed Circuit Board Connector Wiring Diagram and Name Si04 115 14 Printed Circuit Board Connector Wiring Diagram P C B 1 Control P C B Detail...

Page 24: ...nnector PCB 1 S10 Connector for Main PCB 2 S11 Connector for Mid PCB 3 S30 Connector for compressor motor with internal thermostat OL 4 S70 Connector for fan motor 5 S80 Connector for 4 WAY VALVE COIL...

Page 25: ...Printed Circuit Board Connector Wiring Diagram and Name Si04 115 16 Printed Circuit Board Connector Wiring Diagram P C B Detail...

Page 26: ...ouveres and Autoswing 25 1 7 Fan Speed Control for Indoor Units 26 1 8 Fan Speed Control for Outdoor Units 27 1 9 General Functions 28 1 10 Intelligent Eye 30 1 11 Good Sleep Cooling Control 32 1 12 A...

Page 27: ...the thermistors that control the frequency with available functions and no available functions OUTDOOR UNIT M COOLING HEATING FIELD PIPING FIELD PIPING R1T R2T INDOOR UNIT R1T R2T M R1899 Controls Out...

Page 28: ...exchanger thermistor R2T To control the pressure By setting a high frequency limit heating mode Toutdoor 16 C Tindoor heat exchanger 22 C compressor on compressor stop timer delay 70 s has passed Fre...

Page 29: ...it inverter room air conditioners Note The outdoor unit retains the operating mode when the thermostat is switched off Refer to Pre heat operation on page 28 Mode Item Normal operating mode Auto Heat...

Page 30: ...iew of the inverter principle Phase Description 1 The single phase power supply in AC is converted into DC 2 The single phase power supply DC is converted into a three phase chopped DC voltage with a...

Page 31: ...ng 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 table shows the functions th...

Page 32: ...1 C T ambient outdoor C if 3 C T ambient outdoor 19 C Condition Description 1 A minutes of accumulated runtime not yet 90 minutes of accumulated runtime condition 1 or 2 or 3 in the table below 2 90...

Page 33: ...ng mode Start Adjustment 1 Keep pushing the operation switch of the indoor unit for 5 to 10 seconds 2 Change the remote controller setting to a cooling test operation Regarding a way to enter the test...

Page 34: ...operation mode The position a user set will be selected among the five positions calculated through the preliminary and evenly divided into four partitions which were taken from the upper and lower f...

Page 35: ...perate H tap 50 70 rpm 2 Fan stops during defrost operation Automatic air flow control for heating The following drawing explains the principle for fan speed control for heating Note When there is no...

Page 36: ...e compressor turns off and T outdoor ambient D C the outdoor fan stays running at the same speed for E seconds ON OFF A C B C For ambient temperature between C C outdoor heat exchanger temperature R19...

Page 37: ...ing temperature When entering the following dry mode Stop an operation will start with Dry Mode except Dry changing to dry mode Thermostat ON OFF point is decided in accordance with the following cond...

Page 38: ...Room temp 18 C A 0 0Hz except A 34 34Hz Room temp 18 C A 0 0Hz B 34 34Hz D 40 40Hz E 42 42Hz F 42 42Hz Fan rpm thermostat ON J type 25 35 Thermostat ON 970 980rpm Thermostat OFF 800 800rpm Thermostat...

Page 39: ...and Auto according to the operation mode at that time 1 In case of Fan mode the fan speed reduces by 50 rpm Since the set temperature is shifted by 2 C higher for 40 minutes compressor speed becomes l...

Page 40: ...y minutes if the sensor detects human motion detection signal it turns on Human detection LED and let the set temperature and the fan speed return to the original set point keeping a normal operation...

Page 41: ...to the same with an existing value in accordance with the passed time since the OFF timer was set 4 When the good sleep cooling control is on while a normal operation with a OFF timer is going on once...

Page 42: ...re 2 5 deg Cooling Heating switching point Room temperature Main unit setting temperature 2 5 deg Thermostat ON OFF point is the same as the ON OFF point of cooling or heating operation 4 During initi...

Page 43: ...zone judged as the return zone with I IN I3 I I 1A Limit of frequency is cancelled Stop zone judged as the stop zone with I IN I4 Compressor is stopped and countermeasure for the malfunction is carri...

Page 44: ...ency is not conducted in the return area by means of freeze protection control Frequency is increased approximately every 2 Hz min in the up area Frequency alteration in the steady area is not conduct...

Page 45: ...ivalent to head pressure Processing J type makes DP1 DP4 increase 2 C in POWER FULL heating operation DP Peak cut temperature of heat exchanger The restriction for frequency is not conducted in the re...

Page 46: ...over action is ensured Processing 1 If a four way valve is OFF when compressors stop it will be ON at this time 2 If a four way valve was ON when compressors operated in the last time it will be ON a...

Page 47: ...A constant is chosen in accordance with A B decided in 1 Timer TCG1 A B will start at the start of compressors The upper limit of output frequency in between TCG1 A B is set at FCG1 A B In exceeding T...

Page 48: ...rature DOA3CG If and are under the simultaneous condition with AND the lower limit of frequency in this function is set at FCG8 Compressors stop Outdoor temperature DOA4CG If and are under the coordin...

Page 49: ...rature 32 C Dew condensation sweating prevention function will be completed if are under the coordinate condition with OR 2 Control details It controls the operation frequency in accordance with the t...

Page 50: ...Si04 115 System Configuration 41 Part 5 System Configuration 1 Instruction 42 1 1 FTK25 35J FTX25 35J 42...

Page 51: ...ormance or quality may deteriorate and animal or plant life may be shorter Before cleaning be sure to stop the operation and turn the breaker OFF As a fan is rotating at a high speed cleaning during o...

Page 52: ...pes of environments consult the shop l Places with an oily ambient or where steam or soot occurs l Salty environment such as coastal areas l Places where sulfide gas occurs such as hot springs l Place...

Page 53: ...rature around the unit FTK FTX Mode COOL AUTO Air flow rate AUTO AUTO Temperature setting 22 C 25 C The operation mode refers to the following table Push this button once to start operation Push once...

Page 54: ...erature setting Display It displays the current settings In this illustration each section is shown with all its displays ON for the purpose of explanation Some models may not show all its indications...

Page 55: ...oose a place from where the signals reach the unit Fix the holder to a wall a pillar etc with the screws supplied with the holder Fit the claw of the holder into the bottom of the remote controller an...

Page 56: ...ndoor humidity 80 max If operation is continued out of this range A safety device may work to stop the operation Condensation may occur on the indoor unit and drip A safety device may work to stop the...

Page 57: ...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 does...

Page 58: ...efore POWERFUL operation During you use POWERFUL operation the other function will not go on Press To cancel POWERFUL operation Press Notes on POWERFUL operation In COOL and HEAT mode To maximize the...

Page 59: ...eed ATTENTION Notes on flap angles l When SWING is selected the flap swinging range depends on the operation mode See the figure l The real flap angles are differ from the display of remote controller...

Page 60: ...very pressing of either button increases or decreases the time setting by 10 minutes Holding down either button changes the setting rapidly ON TIMER operation 1 2 3 Combining ON TIMER and OFF TIMER A...

Page 61: ...is used in temperature control With it temperature is fluctuated within a 1 C range of the set temperature The 1 f fluctuation is comfortable rhythm existed in the natural world refer to What s the 1...

Page 62: ...body back in the room Back to normal operation The sensor lamp lights up again Intelligent Eye is useful for Energy Saving Save operation Change the temperature 2 C in heat 2 C in cool 1 C in dry mode...

Page 63: ...OTE l To order air purifying filters contact the service shop where you bought the air conditioner l Once the air purifying filter element gets dirty it is not reusable but must be thrown away l Opera...

Page 64: ...le by the tabs on the two sides and lift it until it stops with a click 1 3 Clean the front grille l You may wipe it with a soft cloth soaked in water l Only neutral detergent may be used l You may wa...

Page 65: ...e system is taking away the frost on the outdoor unit You should wait for about 3 to 8 minutes n In HEAT mode The frost on the outdoor unit melts into water or steam when the air conditioner is in def...

Page 66: ...ything to block the air inlet or the outlet of the indoor and the outdoor units l Is the temperature setting appropriate l Are the windows and doors closed l Are the air flow rate and the air directio...

Page 67: ...a burning smell Water leaks from the indoor unit Turn the breaker OFF and call the service shop After a power failure The air conditioner automatically resumes operation in about three minutes You sho...

Page 68: ...M INDOOR UNIT MEANING INTERNAL THERMOSTAT WORKED OR HIGH DISCHARGE PIPE TEMPERATURE FAULTY COMPRESSOR START CT ABNORMALITY FAULTY SUCTION AIR TEMPERATURE SENSOR FAULTY DISCHARGE PIPE TEMPERATURE SENSO...

Page 69: ...Instruction Si04 115 60 System Configuration...

Page 70: ...otor AC Motor or Related Abnormality 68 5 4 Operation Halt Due to Detection of Thermistor or Related Abnormality 69 5 5 Faulty Indoor Unit PCB 70 5 6 Faulty Indoor Unit PCB 71 5 7 Power Supply Abnorma...

Page 71: ...ted 1 When a protection device of the indoor or outdoor unit is activated or when the thermistor malfunctions disabling equipment operation 2 When a signal transmission error occurs between the indoor...

Page 72: ...e of 2 to 10 cycles can stop air conditioner operation Operation lamp OFF Check the outside air temperature Heating operation cannot be used when the outside temperature is 30 C or higher only for fea...

Page 73: ...4 E6 14 J3 24 E8 5 L5 15 A3 25 P4 6 A6 16 A1 26 L3 7 E5 17 C4 27 L4 8 LC 18 C5 28 H6 9 C9 19 H9 29 H7 10 U0 20 J6 30 U2 C ON AMPM AMPM TEMP ON OFF MODE SLEEP SENSOR ON OFF TIMER FAN SWING CANCEL POWE...

Page 74: ...ion or high pressure control A6 Fan motor or related abnormality C4 Heat exchanger temperature thermistor abnormality C9 Room temperature thermistor abnormality CA Discharge air temperature thermistor...

Page 75: ...Method of Malfunction Detection Evaluation of zero cross detection of power supply by indoor unit Malfunction Decision Conditions When there is no zero cross detection in approximately 10 continuous...

Page 76: ...exchanger temperature is below 0 C during cooling operation Supposed Causes Operation halt due to clogged air filter of the indoor unit Operation halt due to dust accumulation on the indoor unit heat...

Page 77: ...fan motor Detection error due to faulty indoor unit PCB 1 Troubleshooting Check No 16 Refer to P 92 Rotate the fan by hand Check No 16 Check hall IC Operate the fan Does it rotate NO Does it rotate sm...

Page 78: ...When above about 212 C less than 120 or below about 50 C more than 1 860 k Note The values vary slightly in some models Supposed Causes Faulty connector connection Faulty thermistor Faulty PCB Trouble...

Page 79: ...s in abnormal condition due to an external factor Noise Momentary voltage drop Momentary power failure etc Faulty indoor unit PCB Troubleshooting Turn on the power again Check the grounding earth NO R...

Page 80: ...door unit LED Display Method of Malfunction Detection The condition of the transmission circuit for indoor outdoor signal transmission is detected Malfunction Decision Conditions When the transmission...

Page 81: ...e signals transmitted by the outdoor unit in indoor outdoor signal communications Supposed Causes Display disabled by fault power supply Faulty signal transmitting receiving circuit in indoor printed...

Page 82: ...t outdoor unit signal transmission error due to breaking of wire in the connection wires between the indoor and outdoor units wire No 2 Troubleshooting Check No 13 Refer to P 91 Check the outdoor unit...

Page 83: ...cy stops Supposed Causes Faulty power transistor Breaking of wire or faulty connection of internal wiring Faulty outdoor PCB 1 Troubleshooting Check No 3 Refer to P 85 Check No 11 Refer to P 90 Check...

Page 84: ...n the thermistor input during compressor operation is more than 4 96 V or less than 0 04 V Value changes depends on models Supposed Causes Faulty connector connection Faulty thermistor Faulty PCB Trou...

Page 85: ...pressor Startup error due to faulty outdoor unit PCB Startup error due to closed stop valve Detection error due to faulty outdoor unit PCB Troubleshooting Check No 3 Refer to P 85 Check No 4 Refer to...

Page 86: ...overcurrent enters microcomputer from output overcurrent detection circuit When error occurs 6 times system shuts down Condition for error counter reset When compressor operates for 5 minutes without...

Page 87: ...period of time Possible causes n Momentary supply voltage drop n Excessive load on compressor motor n Shorting in electric circuit due to contact Is stop valve fully open NO Are outputs of phases U V...

Page 88: ...run away due to an external factor Noise Momentary voltage drop Momentary power failure etc Faulty outdoor unit PCB Troubleshooting Turn on the power again Check the grounding YES YES Replace the outd...

Page 89: ...n external factor Noise Momentary voltage drop Momentary power failure etc Faulty outdoor unit PCB Troubleshooting Check No 13 Refer to P 91 Is the grounding proper Is there any disturbance Is it norm...

Page 90: ...ssor operation Malfunction Decision Conditions When the CT input remains above the value shown in the below table for 2 5 seconds during compressor operation Table for constant Supposed Causes Over cu...

Page 91: ...onductivity of the electrolytic capacitor of the main inverter circuit YES YES Replace the outdoor unit PCB Replace the outdoor unit PCB Replace the outdoor unit PCB Replace the electrolytic capacitor...

Page 92: ...tself if any of the following troubles does not occur for a total one operating hour of the compressor since the interruption OL failure radiation fin temperature rise gas shortage or compressor failu...

Page 93: ...Checking the refrigerant line Check continuity between contacts using a tester YES NO Is the connector tight Check connection of the OL connector YES NO Is there continuity Check continuity of the OL...

Page 94: ...itor voltage check Measuring method Before measuring operate the unit for several minutes then shut down the operation by force using the circuit breaker If the unit is shut down using the remote cont...

Page 95: ...at the power transistor and terminals in the same way as described in section 1 Set the multi tester to DC and VOLTAGE RANGE before measurement Since capacitor and are connected to power transistor an...

Page 96: ...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 97: ...s 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 98: ...ation condition check Normal Change the position of the air discharge grille or the installation location Change the position of the air discharge grille or the installation location Clean the heat ex...

Page 99: ...rminal of tester negative terminal for digital tester Normal resistance Several K to M Several K to M Unacceptable resistance 0 or 0 0 0 or Discharge pressure check Open the stop valve Replace the pip...

Page 100: ...ere is waveform disturbance near the zero cross sections circled in Fig 2 6 1 8 Inverter Units Compressor Refrigerant System Check Check No 15 Fig 1 Fig 2 Compressor refrigerant system check Faulty co...

Page 101: ...n motor Both 1 and 2 result Replace the PCB 6 1 10 Refrigerant System Check Check No 17 Is any moisture found in sight glass Is the discharge thermistor disconnected from the holder YES Is the tempera...

Page 102: ...ox PC Board and Swing Motor 102 1 5 Removal of Heat Exchanger 108 1 6 Install of Drain Plug 111 1 7 Removal of Fan Rotor and Motor 112 2 For RK25J RK35J RX25J RX35J 116 2 1 Removal of External Casing...

Page 103: ...ernal features If ON OFF button is kept pushing for 5 seconds a forced cooling operation will be carried out for approx 15 minutes Illustrations show D series 2 Removing air filters 1 Pull protrusions...

Page 104: ...tion part 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...

Page 105: ...K25J FTK35J FTX25J FTX35J Si04 115 96 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...

Page 106: ...dure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Opening and closing of service cover 1 Remove a service cover mou...

Page 107: ...ere 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 whi...

Page 108: ...5J FTX35J Removal Procedure 99 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...

Page 109: ...or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove horizontal blade 1 Lift horizontal blade to open position Screw stoppers inside the flap which wer...

Page 110: ...edge of the blade to the tip while rotating it 2 Restore the two fixed parts of the horizontal blade onto the hook 2 Removal of vertical blade 1 Disengage the vertical blade s joint from the fixed pl...

Page 111: ...upplies before disassembling work Step Procedure Points Remove front grill 1 Remove switch box 1 Disconnect the connection wires 2 Disconnect connectors S1 and S7 of fan motor Pay attention to the dir...

Page 112: ...K25J FTK35J FTX25J FTX35J Removal Procedure 103 5 Remove a screw on the terminal strip The switch box can be removed instead of disengaging the terminal strip 6 Remove a screw on the switch box Step P...

Page 113: ...For FTK25J FTK35J FTX25J FTX35J Si04 115 104 Removal Procedure 7 Pull up the switch box forward to remove A hook is provided on the behind Step Procedure Points...

Page 114: ...Removal of printed circuit board 1 Remove the shelter 2 Disengage the front plate of the switch box Disengage the knobs by pushing the two hooks at the top and the bottom 3 Sliding to the left the fr...

Page 115: ...For FTK25J FTK35J FTX25J FTX35J Si04 115 106 Removal Procedure 4 Disengage the four knobs on the back of the display printed circuit board 5 Display printed circuit board Step Procedure Points...

Page 116: ...it board is integrated with the power supply printed circuit board 3 Remove swing motor assembly 1 To remove swing motor assembly remove two screws Manual adjusting for the vertical blades Provide a s...

Page 117: ...rant 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 res...

Page 118: ...forward 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 r...

Page 119: ...Si04 115 110 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...

Page 120: ...off 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...

Page 121: ...Procedure 1 7 Removal of Fan Rotor and Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points Remove heat excha...

Page 122: ...Si04 115 For FTK25J FTK35J FTX25J FTX35J Removal Procedure 113 2 Disengage hook 3 Loosen the hexagon head set screw on the fan rotor Step Procedure Points...

Page 123: ...For FTK25J FTK35J FTX25J FTX35J Si04 115 114 Removal Procedure 4 Remove the motor and fan rotor 5 Remove a screw on the left side panel Step Procedure Points...

Page 124: ...X35J Removal Procedure 115 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...

Page 125: ...valve cover can be removed when the fixed screw is removed As three hooks are provided slide the cover downward to remove The forced cooling operation in the pumping down mode can be carried out by pu...

Page 126: ...de and the two screws on the front plate 3 Remove the three screws on the left side 4 Remove the one fixed screw in the rear of the top plate Once lift the top plate and then remove it forward The lef...

Page 127: ...Removal Procedure 5 The front plate and the left side plate can be removed when the one fixed screw is removed Sectional view at the front Step Procedure Points Top plate Left side plate The edge of t...

Page 128: ...10 min before disassembling work Step Procedure Points 1 The bell mouth is attached to the front plate with two screws and four hooks Remove the bell mouth from the front plate after removing the two...

Page 129: ...off all power supplies at least 10 min before disassembling work Step Procedure Points 1 Remove the shelter The shelter has five hooks Be sure to avoid forgetting to restore the shelter and to avoid...

Page 130: ...For RK25J RK35J RX25J RX35J Removal Procedure 121 2 Remove the four screws fixing the printed circuit board 3 Disconnect the wire harness 4 Disconnect the two connectors of the reactor Step Procedure...

Page 131: ...Si04 115 122 Removal Procedure 5 Undo the eight hooks and the printed circuit board can be disengaged The printed circuit board has eight hooks 6 Disconnect the three wires from the printed circuit b...

Page 132: ...4 115 For RK25J RK35J RX25J RX35J Removal Procedure 123 7 The printed circuit board can completely be released 3 Remove the switch box 1 Remove the two screws fixing the switch box Step Procedure Poin...

Page 133: ...For RK25J RK35J RX25J RX35J Si04 115 124 Removal Procedure 2 Lift and remove the switch box 4 Remove the molded interconnect device MID 1 Remove the one screw fixing the MID Step Procedure Points...

Page 134: ...Si04 115 For RK25J RK35J RX25J RX35J Removal Procedure 125 2 Slide the MID upward and release Step Procedure Points...

Page 135: ...c parts Be sure to avoid forgetting to restore the shelter and to avoid loosing or damaging it When restoring match the mark of the propeller fan with the D cut of the motor shaft The fan should be re...

Page 136: ...Si04 115 For RK25J RK35J RX25J RX35J Removal Procedure 127 4 Remove the fan motor Step Procedure Points...

Page 137: ...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 slit...

Page 138: ...Pull out the top pad of the noise absorption a Since the slit prepared for the piping on the noise absorption pad is torn easily remove the pad carefully 4 Pull out the body of the noise absorption pa...

Page 139: ...tor Procedure Warning Be sure to turn off all power supplies at least 10 min before disassembling work Step Procedure Points 1 To remove the partition plate 1 Disengage the lead wires from the wire cl...

Page 140: ...J RK35J RX25J RX35J Removal Procedure 131 4 When restoring the partition plate put the hook into the bottom frame 2 To remove the reactor 1 The reactor can be removed by removing the fixed screw Step...

Page 141: ...of the compressor and the partition plate so as not to be burnt out by a gas brazing machine 2 Remove the thermister for the heat exchanger The thermister for heat exchanger is fixed by a tie lap at...

Page 142: ...ed and avoid excessive heating it keeps below 120 degree C Be careful so as not to break pipes by pressing the pipes excessively by a plier when withdrawing the piping 4 Provide a protective sheet or...

Page 143: ...wer supplies at least 10 min before disassembling work Step Procedure Points 1 To Remove the Parts Around the Compressor Be careful so as not to burn the compressor terminals or the name plate 1 Remov...

Page 144: ...careful about pipes and so on which were heated up by a gas brazing machine so as not to get burnt on your hands Pay attention so that the heat exchanger s fins will not be burnt 3 Remove the nut by m...

Page 145: ...For RK25J RK35J RX25J RX35J Si04 115 136 Removal Procedure...

Page 146: ...Si04 115 Others 137 Part 8 Others 1 Others 138 1 1 Explanation 138...

Page 147: ...low Trial operation from Remote Controller 1 Press ON OFF button to turn on the system 2 Simultaneously press center of TEMP button and MODE buttons 3 Press MODE button twice T will appear on the disp...

Page 148: ...ok However do the following when using the KRP413A1S Contact connection centralized control PC board Note The power failure recovery function is controlled by the ON signal from the centralized contro...

Page 149: ...sh and slide the sensor to adjust the angle Aim so that the sensor is pointing to the center of the room or to the part of the room that is most frequently used After adjusting the angle gently wipe t...

Page 150: ...115 Appendix 141 Part 9 Part 9 Part 9 Part 9 Appendix Appendix Appendix Appendix 1 Piping Diagram 142 1 1 Indoor Unit 142 1 2 Outdoor Unit 143 2 Wiring Diagram 145 2 1 Indoor Unit 145 2 2 Outdoor Unit...

Page 151: ...am 1 1 Indoor Unit 1 1 1 Cooling Only and Heat Pump FIELD PIPING FIELD PIPING CROSS FLOW FAN FAN MOTOR ON HEAT EXCH HEAT EXCHANGER INDOOR UNIT 4D019960D 12 7 FTX35 7 0CuT 7 0CuT 6 4CuT FTK35 7 0CuT 9...

Page 152: ...TEMPARATURE HEAT REFRIGERANT FLOW EXCHANGER 9 5CuT THERMISTOR 7 9CuT 7 9CuT ACCUMLATOR HEAT EXCHANGER PROPELLER FAN 7 9CuT 7 9CuT COMPRESSOR 7 9CuT 9 5CuT OUTDOOR UNIT 3D019958B M 12 7CuT 6 4CuT FIEL...

Page 153: ...PILLARY TUBE 1 CAPILLARY TUBE 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 3D019959B 9 5CuT VALVE FOUR WAY ON COOLI...

Page 154: ...S1W OPERATION SWITCH SW7 WHT GRN YLW M1S SWING MOTOR S36 S7 X1M TERMINAL STRIP t S32 H3P 140 C 1 S21 FU R1T 3 M ADDRESS JUMPER IS MARKED JA ON PCB 2 H1P H3P PILOT LAMP H2 RED PCB1 FU FUSE outdoor H1P...

Page 155: ...RALIZED CONTROL 3D020026E PROTECTIVE EARTH X1M TERMINAL STRIP M1F FAN MOTOR S1W OPERATION SWITCH SW7 H1P H3P PILOT LAMP R1T R3T THERMISTOR PCB1 PCB3 PRINTED CIRCUIT BOARD M1S SWING MOTOR S1 S36 CONNEC...

Page 156: ...1 TFU 102 C N 1 3 2 L YLW GRN GRN FU2 20A Z3C YLW V2 V3 SA1 L1 S30 S70 S80 S10 S11 R1T R2T THERMISTOR Q1L OVERLOAD PROTECTOR SA1 SURGE ARRESTER TRM1 TRANSISTOR MODULE S90 CONNECTOR TFU THERMAL FUSE P...

Page 157: ...V2 V3 SA1 L1 MID N TFU PCB S90 SA1 TRM1 Q1L R1T R2T S10 S11 S30 S70 S80 S10 7 1 H2 outdoor H1 WHT BLK BLK BLK BLK BLK BLK RED BLK OVERLOAD PROTECTOR SURGE ARRESTER NEUTRAL THERMAL FUSE CONNECTOR PRIN...

Page 158: ...Control 32 H H8 74 H9 75 Hall IC Check 92 Hot start function 28 How to set the different addresses 139 I Input Current Control 34 Install of Drain Plug 111 Installation Condition Check 89 Instruction...

Page 159: ...lve 132 Removal of Front Grille 97 Removal of Heat Exchanger 108 Removal of Horizontal Blade and Vertical Blade 100 Removal of Partition Plate and Reactor 130 Removal of PC Board and Switch Box 120 Re...

Page 160: ...ration Halt Due to Detection of CT Error 74 Operation Halt Due to Detection of Input Over Current 81 Operation Halt Due to Detection of Thermistor or Related Abnormality 69 Operation Halt Due to Fan M...

Page 161: ...Operation Protection 39 Wide angle Flaps Diffuser Louveres and Autoswing 25 Wiring Diagram FTK25JVE9 FTK25JVEA9 FTK25JVET9 FTK25JV1NB9 145 FTK35JVE9 FTK35JVEA9 FTK35JVET9 FTK35JV1NB9 145 FTX25JVEA9 F...

Page 162: ...0 8323 Japan Tokyo office Shinjuku Sumitomo Bldg 6 1 Nishi Shinjuku 2 chome Shinjuku ku Tokyo 163 0235 Japan Zandvoordestraat 300 B 8400 Oostende Belgium For further improvement specifications or desi...

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