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Daikin FTKS20DVMW(L) Service Manual Download Page 68

SiENBE04-507A

Function of Thermistor

Function and Control

59

2. Function of Thermistor

2.1

Heat Pump Model

A   Outdoor Heat 
Exchanger 
Thermistor (DCB)

1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature.

The system sets a target discharge temperature according to the outdoor and indoor heat 
exchanger temperature, and controls the electronic expansion valve opening so that the 
target discharge temperature can be obtained. 

2. The outdoor heat exchanger thermistor is used for detecting disconnection of the discharge 

thermistor when cooling.
When the discharge pipe temperature becomes lower than the outdoor heat exchanger 
temperature, the discharge pipe thermistor is judged as disconnected.

3. The outdoor heat exchanger thermistor is used for high pressure protection during cooling 

operation.

B   Discharge 
Pipe Thermistor 
(DOT)

1. The discharge pipe thermistor is used for controlling temperature of the discharge pipe.

If the temperature of discharge pipe (used in place of the inner temperature of the 
compressor) rises abnormally, the operating frequency drops or the operation halts.

2. The discharge pipe thermistor is used for detecting disconnection of the discharge 

thermistor.

C   Indoor Heat 
Exchanger 
Thermistor (DCN)

1. The indoor heat exchanger thermistor is used for controlling target discharge temperature.

The system sets a target discharge temperature according to the outdoor and indoor heat 
exchanger temperature, and controls the electronic expansion valve opening so that the 
target discharge temperature can be obtained.

2. The indoor heat exchanger thermistor is used for preventing freezing.

During the cooling operation, if the temperature drops abnormally, the operating frequency 
becomes lower, then the operation halts.

3. The indoor heat exchanger thermistor is used for anti-icing control.

During the cooling operation, if the heat exchanger temperature in the room where operation 
is halted becomes -1°C, it is assumed as icing.

4. During heating, the indoor heat exchanger thermistor is used for detecting disconnection of 

the discharge pipe thermistor.
When the discharge pipe temperature becomes lower than the indoor heat exchanger 
temperature, the discharge pipe thermistor is judged as disconnected.

Four way valve

Compressor

(R3305)

C

B

A

Summary of Contents for FTKS20DVMW(L)

Page 1: ...Service Manual SiENBE04 507A Service Manual Applied Models Inverter Pair Cooling Only Inverter Pair Heat Pump Inverter Pair Wall Mounted Type D Series...

Page 2: ...AVMW L FTKS35D3VMW L Outdoor Unit RKS20DVMB RKS20D2VMB RKS20D3VMB RKS25DVMB RKS25D2VMB RKS25D3VMB RKS35DVMB RKS35D2VMB RKS35D3VMB zHeat Pump Indoor Unit FTXS20DVMW L FTXS20DVMW9 FTXS20D2VMW L FTXS25DV...

Page 3: ...on 51 1 6 Thermostat Control 52 1 7 NIGHT SET Mode 53 1 8 ECONO Mode 54 1 9 INTELLIGENT EYE 55 1 10 Inverter POWERFUL Operation 57 1 11 Other Functions 58 2 Function of Thermistor 59 2 1 Heat Pump Mod...

Page 4: ...sure Control 113 4 4 Fan Motor DC Motor or Related Abnormality 115 4 5 Thermistor or Related Abnormality Indoor Unit 117 4 6 Signal Transmission Error between Indoor and Outdoor Unit 118 4 7 Unspecifi...

Page 5: ...ger 177 1 10 Removal of Fan Rotor 180 2 Outdoor Unit 183 2 1 Removal of Panels and Fan Motor 183 2 2 Removal of Electrical Box 190 2 3 Removal of Reactor and Partition Plate 192 2 4 Removal of Sound B...

Page 6: ...plug 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 equipm...

Page 7: ...the 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...

Page 8: ...ot 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 harml...

Page 9: ...ng and 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 resista...

Page 10: ...SiENBE04 507A List of Functions 1 Part 1 List of Functions 1 List of Functions 2...

Page 11: ...eliability Durability Auto Restart after Power Failure Comfort Airflow Mode Self Diagnosis Digital LED Display H2 H2 3 Step Airflow H P Only Comfort Control Auto Fan Speed Wiring Error Check Indoor Un...

Page 12: ...urability Auto Restart after Power Failure Comfort Airflow Mode Self Diagnosis Digital LED Display H2 H2 3 Step Airflow H P Only Comfort Control Auto Fan Speed Wiring Error Check Indoor Unit Silent Op...

Page 13: ...ty Durability Auto Restart after Power Failure Comfort Airflow Mode Self Diagnosis Digital LED Display H2 H2 3 Step Airflow H P Only Comfort Control Auto Fan Speed Wiring Error Check Indoor Unit Silen...

Page 14: ...urability Auto Restart after Power Failure Comfort Airflow Mode Self Diagnosis Digital LED Display H2 H2 3 Step Airflow H P Only Comfort Control Auto Fan Speed Wiring Error Check Indoor Unit Silent Op...

Page 15: ...urability Auto Restart after Power Failure Comfort Airflow Mode Self Diagnosis Digital LED Display H2 H2 3 Step Airflow H P Only Comfort Control Auto Fan Speed Wiring Error Check Indoor Unit Silent Op...

Page 16: ...SiENBE04 507A Specifications 7 Part 2 Specifications 1 Specifications 8 1 1 Cooling Only 8 1 2 Heat Pump 21...

Page 17: ...t Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 16 0 16 0 16 Power Consumption Rated W 3...

Page 18: ...ntal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 16 0 16 0 16 Power Consumption Rated W 35 35 35 Power...

Page 19: ...Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 16 0 16 Power Consumption Rated W 35 35 Power Factor 95 1 95 1 Temp...

Page 20: ...tal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 16 0 16 0 16 Power Consumption Rated W 35 35 35 Power...

Page 21: ...ontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 16 0 16 0 16 Power Consumption Rated W 35 35 35 Powe...

Page 22: ...d Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 16 0 16 Power Consumption Rated W 35 35 Power Factor 95 1 95 1 Tem...

Page 23: ...rizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 0 18 Power Consumption Rated W 40 40 40 P...

Page 24: ...Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 0 18 Power Consumption Rated W 40 40 40...

Page 25: ...ward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 Power Consumption Rated W 40 40 Power Factor 96 6 96 6...

Page 26: ...tal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 16 0 16 0 16 Power Consumption Rated W 35 35 35 Power...

Page 27: ...izontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 16 0 16 0 16 Power Consumption Rated W 35 35 35 Po...

Page 28: ...zontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 16 0 16 0 18 Power Consumption Rated W 35 35 40 Pow...

Page 29: ...t Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 0 18 Power Consumption Rated W 40 40...

Page 30: ...rection Control Right Left Horizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 16 0 16 0 16 0 16 Pow...

Page 31: ...Control Right Left Horizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 16 0 16 0 16 0 16 Power Consu...

Page 32: ...on Control Right Left Horizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 16 0 16 0 16 0 16 Power Co...

Page 33: ...ction Control Right Left Horizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 16 0 16 0 16 0 16 Power...

Page 34: ...on Control Right Left Horizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 16 0 16 0 16 0 16 Power Co...

Page 35: ...n Control Right Left Horizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 16 0 16 0 16 0 16 Power Con...

Page 36: ...tion Control Right Left Horizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 16 0 16 0 16 0 16 Power...

Page 37: ...rection Control Right Left Horizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 16 0 16 0 16 0 16 Pow...

Page 38: ...rection Control Right Left Horizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 0 18 0 18 Pow...

Page 39: ...ection Control Right Left Horizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 0 18 0 18 Powe...

Page 40: ...Direction Control Right Left Horizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 0 18 0 18 P...

Page 41: ...ir Direction Control Right Left Horizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 0 18 0 1...

Page 42: ...on Control Right Left Horizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 16 0 16 0 16 0 16 Power Co...

Page 43: ...on Control Right Left Horizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 16 0 16 0 16 0 16 Power Co...

Page 44: ...tion Control Right Left Horizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 16 0 16 0 16 0 16 Power...

Page 45: ...tion Control Right Left Horizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 16 0 16 0 16 0 16 Power...

Page 46: ...Direction Control Right Left Horizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 0 18 0 18 P...

Page 47: ...Direction Control Right Left Horizontal Downward Right Left Horizontal Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 0 18 0 18 P...

Page 48: ...BE04 507A Printed Circuit Board Connector Wiring Diagram 39 Part 3 Printed Circuit Board Connector Wiring Diagram 1 Printed Circuit Board Connector Wiring Diagram 40 1 1 Indoor Unit 40 1 2 Outdoor Uni...

Page 49: ...7 S29 S36 Connector for control PCB 6 S28 Connector for signal receiver PCB 7 S32 Connector for heat exchanger thermistor 8 S35 Connector for INTELLIGENT EYE sensor PCB 1 V1 Varistor 2 JA Address sett...

Page 50: ...rinted Circuit Board Connector Wiring Diagram 41 PCB Detail PCB 1 Control PCB PCB 4 INTELLIGENT EYE sensor PCB V1 S1 FU1 S6 S26 S28 S32 JC JB JA LED A S35 S21 R4288 PCB 2 Signal Receiver PCB PCB 3 Dis...

Page 51: ...for electronic expansion valve coil 4 S30 Connector for compressor motor 5 S40 Connector for overload protector 6 S70 Connector for fan motor 7 S80 Connector for four way valve coil 8 S90 Connector f...

Page 52: ...nnector Wiring Diagram Printed Circuit Board Connector Wiring Diagram 43 PCB Detail PCB 1 Filter PCB PCB 2 Control PCB outdoor unit FU3 20A V3 V2 R4293 S11 S10 S40 LED A S90 S70 J8 FU2 3 15A HC4 R4605...

Page 53: ...Printed Circuit Board Connector Wiring Diagram SiENBE04 507A 44 Printed Circuit Board Connector Wiring Diagram...

Page 54: ...Function of Thermistor 59 2 1 Heat Pump Model 59 2 2 Cooling Only Model 60 3 Control Specification 61 3 1 Mode Hierarchy 61 3 2 Frequency Control 62 3 3 Controls at Mode Changing Start up 64 3 4 Disch...

Page 55: ...ns the conversion principle 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 s...

Page 56: ...o 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 at lo...

Page 57: ...the room Wide Angle Louvres The louvres made of elastic synthetic resin provide a wide range of airflow that guarantees a comfortable air distribution Auto Swing The following table explains the auto...

Page 58: ...ration 3 In time of thermostat OFF the fan rotates at the following speed Cooling The fan keeps rotating at the set tap Heating The fan stops Automatic Air Flow Control for Heating The following drawi...

Page 59: ...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 level Ro...

Page 60: ...etting temperature plus correction value correction value cooling 0 deg heating 2 deg 3 Operation ON OFF point and mode switching point are as follows 1 Heating Cooling switching point Room temperatur...

Page 61: ...erence is above the zone C after being in the zone A The system resumes from defrost control in any zones except A The operation turns on in any zones except A The monitoring time has passed while the...

Page 62: ...raises the temperature setting slightly in the case of cooling or lowers it slightly in the case of heating for economical operations This prevents excessive heating in winter and excessive cooling i...

Page 63: ...can only be set when the unit is running Pressing the operation stop button causes the settings to be cancelled This function and POWERFUL operation cannot be used at the same time The latest command...

Page 64: ...a microcomputer doesn t have a signal from the sensor in 20 minutes it judges that nobody is in the room and operates the unit in temperature sifted 2 C from the set temperature COOL 2 C higher DRY 1...

Page 65: ...es so as to prevent this phenomena After this 40 minutes the prohibition of the thermostat off is cancelled and it can realize the conditions to conduct thermostat off depending on the room temperatur...

Page 66: ...oling mode Operation mode Fan speed Target set temperature COOL H tap 50 rpm 18 C DRY Dry rotating speed 50 rpm Normally targeted temperature in dry operation Approx 2 C HEAT H tap 50 rpm 30 C FAN H t...

Page 67: ...tion there are times when the unit does not activate with this button 1 11 4 Titanium Apatite Photocatalytic Air Purifying Filter This filter combines the Air Purifying Filter and Titanium Apatite Pho...

Page 68: ...essor rises abnormally the operating frequency drops or the operation halts 2 The discharge pipe thermistor is used for detecting disconnection of the discharge thermistor C Indoor Heat Exchanger Ther...

Page 69: ...ontrolling temperature of the discharge pipe If the temperature of discharge pipe used in place of the inner temperature of the compressor rises abnormally the operating frequency drops or the operati...

Page 70: ...nd cooling including drying Note Unless specified otherwise an indoor dry operation command must be regarded as cooling operation Air conditioner control mode Forced operating mode Forced cooling for...

Page 71: ...pper limits of the following functions Compressor protection input current discharge pipes peak cutting freeze up protection defrost 3 Determine lower limit frequency Set a maximum value as an lower l...

Page 72: ...t volume air flow rate and other factors PI Control Determine Frequency Up Down by D Signal 1 P control Calculate D value in each sampling time 20 seconds and adjust the frequency according to its dif...

Page 73: ...ch of the four way valve must be carried out after the operation stopped Detail The OFF delay of four way valve Energize the coil for 160 sec after unit operation is stopped 3 3 3 Four Way Valve Opera...

Page 74: ...If the discharge pipe temperature rises above a certain level the operating frequency upper limit is set to keep this temperature from going up further Detail Divide the Zone Management within the Zon...

Page 75: ...s the steady zone Keep zone The present maximum frequency goes on Reset zone Limit of the frequency is cancelled Stop zone After 2 5 s in this zone the compressor is stopped Limitation of current droo...

Page 76: ...Control Outline Heat Pump Only During heating operation the signals being sent from the indoor unit allow the operating frequency limitation and prevent abnormal high pressure The signal from the ind...

Page 77: ...owerful mode 9 Fan control for pressure difference upkeep Detail Fan OFF Control when Stopped Fan OFF delay for 60 seconds must be made when the compressor is stopped 3 9 Liquid Compression Protection...

Page 78: ...outdoor air temperature and heat exchanger temperature Under the conditions that the system is in heating operation 6 minutes after the compressor is started and more than 28 minutes of accumulated t...

Page 79: ...Discharge pipe temperature control Detail The followings are the examples of control which function in each mode by the electronic expansion valve control R2833 Fully closed when power is turned ON Op...

Page 80: ...Disconnection of the Discharge Pipe Thermistor Outline Detect a disconnected discharge pipe thermistor by comparing the discharge pipe temperature with the condensation temperature If any is disconnec...

Page 81: ...harge pipe temperature from the indoor and outdoor heat exchanger temperature and adjust the electronic expansion valve opening so that the actual discharge pipe temperature become close to that tempe...

Page 82: ...are three ways of control to detect insufficient gas I Detecting by power consumption If the power consumption is below the specified value and the frequency is higher than the specified frequency it...

Page 83: ...e is detected each time equipment operation starts Cooling room temperature indoor heat exchanger temperature 4 0 C outdoor heat exchanger temperature outdoor temperature 4 0 C Heating indoor heat exc...

Page 84: ...temperature rises the operation will start again Caution 1 If the outdoor unit is installed where the heat exchanger of the unit is exposed to direct wind provide a windbreak wall 2 Intermittent noise...

Page 85: ...Control Specification SiENBE04 507A 76 Function and Control...

Page 86: ...9 2 2 Names of parts 81 2 3 Preparation before Operation 84 2 4 AUTO DRY COOL HEAT FAN Operation 87 2 5 Adjusting the Air Flow Direction 89 2 6 POWERFUL Operation 91 2 7 OUTDOOR UNIT SILENT Operation...

Page 87: ...lever 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...

Page 88: ...s and reinstallation consult your Daikin dealer for advice and information The refrigerant used in the air conditioner is safe Although leaks should not occur if for some reason any refrigerant happen...

Page 89: ...use check the unit stand and fittings for damage Do not touch the air inlet and aluminum fins of outdoor unit It may cause injury The appliance is not intended for use by young children or infirm pers...

Page 90: ...SiENBE04 507A Instruction System Configuration 81 2 2 Names of Parts Indoor Unit ON OFF 16 14 13 15 12 1 3 4 5 7 9 10 11 8 6 2...

Page 91: ...e air outlet page 89 12 Indoor Unit ON OFF switch page 87 Push this switch once to start operation Push once again to stop it The operation mode refers to the following table This switch is useful whe...

Page 92: ...mode AUTO DRY COOL HEAT FAN page 87 8 SILENT button for OUTDOOR UNIT SILENT operation page 92 Only works for multi connection 9 FAN setting button It selects the air flow rate setting 10 SWING button...

Page 93: ...ype 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 control display begins to fa...

Page 94: ...the holder to a wall a pillar or similar location with the screws procured locally 3 Place the remote control in the remote control holder ATTENTION Receiver About remote control Never expose the rem...

Page 95: ...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 Operation o...

Page 96: ...nces the mode setting in sequence AUTO DRY COOL HEAT FAN F C TKS F C TXS 2 Press ON OFF button The OPERATION lamp lights up To stop operation 3 Press ON OFF button again Then OPERATION lamp goes off T...

Page 97: ...ll parts of the room After the start of heating operation it takes some time before the room gets warmer In heating operation frost may occur on the outdoor unit and lower the heating capacity In that...

Page 98: ...WING button once more The display will go blank The flaps will stop moving TEMP ON OFF POWERFUL MODE FAN SWING SILENT SENSOR ECONO COMFORT TIMER ON CANCEL OFF 1 2 3 4 To adjust the vertical blades lou...

Page 99: ...s and louvres angles POWERFUL operation and COMFORT AIRFLOW operation cannot be used at the same time Priority is given to POWERFUL operation When SWING button is selected the flaps swinging range dep...

Page 100: ...LCD TEMP ON OFF POWERFUL MODE FAN SWING SILENT SENSOR ECONO COMFORT TIMER ON CANCEL OFF 1 2 Notes on POWERFUL operation POWERFUL Operation cannot be used together with ECONO SILENT or COMFORT Operati...

Page 101: ...eration 1 Press SILENT button is displayed on the LCD To cancel OUTDOOR UNIT SILENT operation 2 Press SILENT button again disappears from the LCD TEMP ON OFF POWERFUL MODE FAN SWING SILENT SENSOR ECON...

Page 102: ...ECONO Operation can only be set when the unit is running Pressing the operation stop button causes the settings to be canceled and the disappears from the LCD ECONO Operation is a function enables eff...

Page 103: ...ress SENSOR button is displayed on the LCD To cancel the INTELLIGENT EYE operation 2 Press SENSOR button again is disappears from the LCD EX TEMP ON OFF POWERFUL MODE FAN SWING SILENT SENSOR ECONO COM...

Page 104: ...t location the speed of passersby temperature range etc The sensor also mistakenly detects pets sunlight fluttering curtains and light reflected off of mirrors as passersby INTELLIGENT EYE operation w...

Page 105: ...n either button changes 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 TEMP ON OFF POWERFUL...

Page 106: ...tton changes the setting 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 s...

Page 107: ...ith cloth dry it up in the shade after washing 4 Attach the front panel Set the 3 keys of the front grille into the slots and push them in all the way Close the front panel slowly and push the panel a...

Page 108: ...ith neutral detergent thinned with lukewarm water then dry them up in the shade It is recommended to clean the air filters every two weeks Titanium Apatite Photocatalytic Air Purifying Filter The Tita...

Page 109: ...or cooling 4 may cause odour To order Titanium Apatite Photocatalytic Air Purifying Filter contact to the service shop there you bought the air conditioner Dispose of old filters as burnable waste Che...

Page 110: ...m 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 unit T...

Page 111: ...d Are the air flow rate and the air direction set appropriately Is the unit set to the INTELLIGENT EYE mode page 94 Operation stops suddenly OPERATION lamp flashes Are the air filters clean Is there a...

Page 112: ...poor performance 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...

Page 113: ...ONT PANEL OPEN CLOSE FAULT C9 FAULTY SUCTION AIR TEMPERATURE SENSOR OUTDOOR UNIT EA COOLING HEATING SWITCHING ERROR E1 CIRCUIT BOARD FAULT E5 OL STARTED E6 FAULTY COMPRESSOR START UP E7 DC FAN MOTOR F...

Page 114: ...Indoor and Outdoor Units 119 4 8 Outdoor Unit PCB Abnormality 120 4 9 OL Activation Compressor Overload 121 4 10 Compressor Lock 122 4 11 DC Fan Lock 123 4 12 Input Over Current Detection 124 4 13 Fo...

Page 115: ...ment operation 2 When a signal transmission error occurs between the indoor and outdoor units In either case conduct the diagnostic procedure described in the following pages Location of Operation Lam...

Page 116: ...y for heat pump model and cooling operation cannot be used when the outdoor air temperature is below 10 C Diagnosis with remote controller indication 111 Equipment operates but does not cool or does n...

Page 117: ...equence 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 5 se...

Page 118: ...2 Press the TEMP button Press TEMPs or TEMPt and change the digit until you hear the sound of beep or pi pi 3 Diagnose by the sound H pi The number of tens does not accord with the error code H pi pi...

Page 119: ...both numbers of tens and units do not accord with the error code H pi pi The number of tens accords with the error code H beep The both numbers of tens and units accord with the error code 7 Determine...

Page 120: ...ure thermistor abnormality 117 Outdoor Unit E1 Outdoor unit PCB abnormality 120 E5H OL activation compressor overload 121 E6H Compressor lock 122 E7 DC fan lock 123 E8 Input over current detection 124...

Page 121: ...oss detection in approximately 10 continuous seconds Supposed Causes Faulty indoor unit PCB Faulty connector connection Troubleshooting Note Connector Nos vary depending on models R1400 Connector conn...

Page 122: ...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 indo...

Page 123: ...n 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 Provide sufficient air passage Clean the...

Page 124: ...l fan motor operation 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...

Page 125: ...eck 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 tur...

Page 126: ...less 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...

Page 127: ...gnal 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 148 Check the outdoor unit s LED A Check t...

Page 128: ...els interconnected Wrong indoor unit PCB mounted Indoor unit PCB defective Wrong outdoor unit PCB mounted or defective Troubleshooting Check the indoor and outdoor unit model numbers Match the compati...

Page 129: ...t detected Supposed Causes The microcomputer is out of control due to external factors Noise Momentary voltage drop Momentary power failure etc Outdoor unit PCB defective Broken harness between PCBs T...

Page 130: ...oubleshooting Check No 4 Refer to P 144 Check No 5 Refer to P 145 Check No 6 Refer to P 146 Check No 11 Refer to P 148 Insert the thermistor in position Replace the discharge pipe thermistor Replace t...

Page 131: ...Supposed Causes Compressor locked Compressor harness disconnected Troubleshooting Note If the model doesn t have SPM replace the outdoor unit PCB Turn off the power Disconnect the harnesses U V and W...

Page 132: ...un for about 10 minutes normal Supposed Causes Fan motor breakdown Harness or connector disconnected between fan motor and PCB or in poor contact Foreign matters stuck in the fan Troubleshooting Check...

Page 133: ...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 Be sure to turn off p...

Page 134: ...ecked 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 oper...

Page 135: ...r switch before connect or disconnect connector or parts damage may be occurred Four way valve coil disconnected loose Check No 11 Check the refrigerant line Harness out of connector Disconnect the ha...

Page 136: ...t exchanger or outdoor air temperature thermistor defective Outdoor unit PCB defective Water mixed in the local piping Electronic expansion valve defective Stop valve defective Troubleshooting Check N...

Page 137: ...ng 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 65 C The error is...

Page 138: ...onnector or fan motor lead wires Replace the heat exchanger thermistor Replace PCB Replace the electronic expansion valve or coil Replace the PCB Change the air outlet grille position Change the insta...

Page 139: ...0 5 4 5 V sensor output converted to voltage value or if the DC voltage before compressor start up is below 50 V Supposed Causes PCB defective Broken or poorly connected harness Troubleshooting Check...

Page 140: ...e disconnected Compressor itself defective Outdoor unit PCB defective Stop valve closed Input voltage out of specification Troubleshooting Check No 13 Refer to P 149 Replace the outdoor unit PCB Repla...

Page 141: ...cision Conditions The compressor running frequency is below 52 Hz The input current is also below 0 5 A If this error repeats 4 times the system will be shut down The error counter will reset itself i...

Page 142: ...erature Malfunction Decision Conditions The thermistor input is above 4 96 V or below 0 04 V with the power on Error J3 is judged if the discharge pipe thermistor temperature is smaller than the conde...

Page 143: ...at exchanger thermistor Outdoor air thermistor Replace the following thermistor Indoor heat exchanger thermistor Replace the outdoor unit PCB Replace the indoor unit PCB R4097 Be sure to turn off powe...

Page 144: ...ecking the radiation fin thermistor with the compressor off Malfunction Decision Conditions With the compressor off the radiation fin temperature is above 80 C Reset is made when the temperature drops...

Page 145: ...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 Check No 9 Check the outdoor unit fan or related Radia...

Page 146: ...radiation fin temperature with the compressor on is above 90 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 147: ...B or the power transistor Replace the fan motor Correct the connectors and fan motor leads Replace the outdoor unit PCB Clean up the radiation fin R4280 Caution Be sure to turn off power switch before...

Page 148: ...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 255 times Clearing condition Contin...

Page 149: ...in to get the system started See if the same error occurs Turn off the power and disconnect the harnesses U V and W Check with the inverter checker Turn off the power and reconnect the harnesses Turn...

Page 150: ...lues are different from model to model Gas shortage detection II If a gas shortage error takes place 4 times successively the system will be shut down The error counter will reset itself if this or an...

Page 151: ...nit heat exchanger thermistor 1 Replace the PCB 2 Replace the compressor Procedure complete R3318 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be...

Page 152: ...on Continuous run for about 10 minutes normal Supposed Causes Supply voltage not as specified Over voltage detection circuit defective PAM control part s defective Troubleshooting Note If the model do...

Page 153: ...ect that connector and check the conductivity using a tester Check the conductivity between pins 1 3 and 6 and between pins 2 4 and 5 If there is no conductivity between the pins the EV coil is faulty...

Page 154: ...unit PCB Replace the four way valve coil Replace the four way valve R3047 Four way valve coil resistance at 3k 0 5k S80 voltage at DC 180 220 V with compressor on Fig 1 Disconnect the four way valve...

Page 155: ...asure 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 Temperature C 20 2...

Page 156: ...outdoor unit The outside air temperature shall be 43 C or lower Check the allowable dimensions of the air suction and discharge area Is the air flow blocked by obstacles or winds blowing in the opposi...

Page 157: ...near the zero cross sections circled in Fig 2 5 1 9 Inverter Units Refrigerant System Check Check No 11 Check the outdoor unit fan system R2857 Outdoor unit fan running Fan motor lead wire connector...

Page 158: ...wer off and disconnect the connector S70 2 Make sure there is about DC 270 V between pins 4 and 7 3 With the system and the power still off reconnect the connector S70 4 Make a turn of the fan motor w...

Page 159: ...Check SiENBE04 507A 150 Service Diagnosis...

Page 160: ...oval of Electrical Box 162 1 6 Removal of PCB 165 1 7 Removal of Drain Pan Unit 171 1 8 Removal of Fan Motor 175 1 9 Removal of Heat Exchanger 177 1 10 Removal of Fan Rotor 180 2 Outdoor Unit 183 2 1...

Page 161: ...the forced cooling operation is performed for about 15 minutes 2 Removing the air filter 1 2 3 Put your fingers on the right and left projections of the front panel and open the panel to the position...

Page 162: ...rifying filter is not marked for difference between the right and left sides 2 3 Remove the titanium apatite photocatalytic air purifying filter frame by bending the air filter and unfastening the pro...

Page 163: ...front panel 1 Put your fingers on the right and left projections of the front panel and open the panel over the position where it will stop 2 3 4 Slide the left rotary shaft to the right and release...

Page 164: ...t Removal Procedure 155 Step Procedure Points 5 Remove the front panel Caution on Mounting When mounting the front panel fit the right and left rotary shafts one by one into the grooves and fully push...

Page 165: ...ure Points 1 Removing the service cover 1 Remove the screw of the service cover Preparation Remove the front panel according to the Removal of Front Panel 2 3 Pull out the service cover diagonally dow...

Page 166: ...at the right and left Remove the screws one each at the right and left Release the 3 hooks at the top Put your fingers into the front grille to the depth and lift the grille up to unhook When install...

Page 167: ...to the grille and lifting it 8 Remove the front grille by tilting the upper part to the front a and lifting and pulling the lower part toward yourself b Caution on Mounting When mounting the front gri...

Page 168: ...ng the horizontal blade slightly Unfasten the left fixing shaft of the horizontal blade large Unfasten the right fixing shaft of the horizontal blade large Cautions on Mounting Mount the large horizon...

Page 169: ...p Procedure Points 2 Removing the horizontal blade small 1 2 3 Remove the horizontal blade small while bending the fixed part at the centre slightly Unfasten the left side Unfasten the key type fixing...

Page 170: ...oks at the shaft mounting part by pressing them with a flat screwdriver Unfasten the hooks at the upper 2 positions 3 Remove the vertical blade toward yourself Six vertical blades are united as a set...

Page 171: ...ing work Step Procedure Points 1 2 3 4 The figure shows the connections of wire harnesses Remove the screw of the electric wire retaining plate Loosen the screws of the terminal board and disconnect t...

Page 172: ...eat exchanger thermistor Disconnect the earth wire by removing the screw Remove the screw of the electrical box Put any excess wires behind the power supply lead wire Use care not to lose the retainer...

Page 173: ...pressing it from above and pulling the box toward yourself Lift up the electrical box and pull it toward yourself When the connector of the fan motor S1 is removed the electrical box can be dismounte...

Page 174: ...rance of the electrical box Open the shelter at the back Push the upper centre of the shelter and unfasten the hooks at the upper 2 positions of the shelter Preparation Remove the electrical box accor...

Page 175: ...ard by removing the screw 4 Removing the signal receiver unit 1 2 Remove the signal receiver unit by unfastening the hooks one each at the right and left Remove the electrical box cover by unfastening...

Page 176: ...liding it to the left Disconnect the wire harness 5 Removing the signal receiver PCB 1 Remove the signal receiver PCB by opening the hooks at 3 positions 2 Disconnect the connector from the signal rec...

Page 177: ...LIGENT EYE PCB 1 2 3 Remove the INTELLIGENT EYE fixing plate by twisting it clockwise Remove the INTELLIGENT EYE PCB by unfastening the hook Disconnect the connector from the INTELLIGENT EYE PCB Step...

Page 178: ...e figure shows the connection of wire harness for the display PCB 2 Remove the display PCB by unfastening the 2 hooks 3 Disconnect the connector from the display PCB 8 Removing the control PCB 1 Dismo...

Page 179: ...PbF is used for the PCB When replacing the PCB use the specific solder and soldering iron S1 To DC fan motor S6 To swing motor S21 HA connector S26 To display PCB S28 To signal receiver PCB S32 To hea...

Page 180: ...to the Removal of Electrical Box Inserting of the wooden base facilitates the removing work Place a plastic bag under the drain pan to prevent from wetting the floor with remaining drain 1 Lift up the...

Page 181: ...in pan toward yourself from the indoor unit body Caution on Mounting Make sure that the hook at the left side is fitted in the groove 2 Removing the swing motor 1 Remove the screw of the swing motor 2...

Page 182: ...y 2 Remove the crank assembly by unfastening the hook 3 The figure shows the position of the hook when the crank assembly has been removed 4 How to connect the drain hose in right piping 1 Pull out th...

Page 183: ...drain hose to the left side 4 Press the removed drain plug into the right side with an Allen wrench 4mm Use a 4mm Allen wrench Caution Do not thrust in the drain plug with a sharp pointed tool like a...

Page 184: ...embling work Step Procedure Points 1 Undo the fan motor lead wires from the hooks Preparation Remove the drain pan unit according to the Removal of Drain Pan Unit You can remove the fan motor with the...

Page 185: ...r Unit SiENBE04 507A 176 Removal Procedure 4 Unfasten the hook a of the fan motor fixing plate with your thumb 5 Unfasten the hook c 6 Remove the fan motor Step Procedure Points Hook a Hook c Hook a H...

Page 186: ...he compressor being operated and the stop valve being open air may be sucked in to generate an over pressure in refrigeration cycle thus resulting in pipe rupture or accidental injury 3 Lift up the in...

Page 187: ...pe fixing plate at the back of the unit and pull out the pipe 2 Widen the auxiliary pipe by about 10 20 degrees 3 Unfasten the lower hook with a flat screwdriver Caution When dismounting or mounting t...

Page 188: ...heat exchanger by its left side and lift it up toward yourself When mounting the heat exchanger make sure that the hook left is fastened 5 When the left side is lifted the hook at the right side come...

Page 189: ...e disassembling work Step Procedure Points 1 Removing the drip proof plate Preparation Remove the heat exchanger according to the Removal of Heat Exchanger 1 Dismount the drip proof plate right by rem...

Page 190: ...ook b 5 The fan motor fixing plate can be removed from the unit when the hook c is unfastened 2 Removing the fan rotor 1 Dislocate the fan rotor by sliding it to the right 2 Remove the fan rotor by lo...

Page 191: ...ing the bearing 1 Remove the screw of the drip proof plate left 2 The drip proof plate can be removed when the hooks at 2 positions are unfastened 3 Press the rubber made bearing with force from outsi...

Page 192: ...supplies before disassembling work Step Procedure Points 1 Features Take care not to cut your finger by the fins of the heat exchanger The stop valve cover is united with the shelter When reassemblin...

Page 193: ...the 3 screws front right left and lift the top panel 2 Remove the drip proof plate 3 Disconnect the connector for fan motor S70 The fan motor is united with the front panel 4 Loosen the 5 screws of th...

Page 194: ...fan motor is united with the front panel 3 Remove the fan motor The screw has reverse winding 1 Unscrew the washer fitted nut M10 of the propeller fan with a spanner 2 Remove the propeller fan Align...

Page 195: ...ell mouth to undo the hooks Remove the bell mouth 4 Loosen the fixing hooks and release the lead wire Put the lead wire through the back of the motor when reassembling so as not to be entangled with t...

Page 196: ...Outdoor Unit Removal Procedure 187 5 Loosen the 4 screws to remove the fan motor M4 16 DC fan motor 6 Loosen the 2 screws to remove the fan motor fixing frame Step Procedure Points Fan motor Fan motor...

Page 197: ...188 Removal Procedure 4 Remove the right side panel 1 Loosen the 2 screws on the rear side 2 Loosen the 3 screws on the right side 3 Loosen the screw and lift the connection port to remove Step Proced...

Page 198: ...SiENBE04 507A Outdoor Unit Removal Procedure 189 When reassembling make sure to fit the hook Step Procedure Points Hook...

Page 199: ...ies before disassembling work Step Procedure Points Remove the top panel Disconnect the connector for fan motor 1 Remove the electrical box 1 Disconnect the 2 reactor harnesses 2 Disconnect the relay...

Page 200: ...ay attention so as not to lose the clip for thermistor 5 Release the heat exchanger thermistor Pay attention so as not to lose the clip 6 Lift and remove the electrical box Step Procedure Points Disch...

Page 201: ...e sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points Remove the outer panels Remove the electrical box 1 Remove the reactor 1 Loosen t...

Page 202: ...utdoor Unit Removal Procedure 193 2 The partition plate has a hook on the lower side Lift and pull the partition plate to remove When reassembling fit the lower hook into the bottom frame Step Procedu...

Page 203: ...fore disassembling work Step Procedure Points Remove the outer panels Remove the electrical box 1 Remove the sound blanket 1 Untie the strings and open the sound blanket 2 Lift and remove the sound bl...

Page 204: ...utdoor Unit Removal Procedure 195 4 Pull the sound blanket inner out Since the piping ports on the sound blanket are torn easily remove the blanket carefully 5 Pull the sound blanket bottom out Step P...

Page 205: ...ower supplies before disassembling work Step Procedure Points 1 Remove the peripheries Remove the four way valve and the sheets of putty so as not to burn them 1 Remove the terminal cover Be careful s...

Page 206: ...e cutter 4 Heat up the brazed part and withdraw the piping with pliers Provide a protective sheet or a steel plate so that the brazing flame cannot influence peripheries Be careful so as not to break...

Page 207: ...to burn the heat exchanger fin Warning Since it may happen that refrigeration oil in the compressor will catch fire prepare wet cloth so as to extinguish fire immediately In case of the difficulty wit...

Page 208: ...SiENBE04 507A Outdoor Unit Removal Procedure 199 Step Procedure Points 3 Heat up the brazed part of the suction side and disconnect 4 Lift the compressor up and remove it...

Page 209: ...ning off all power supplies before disassembling work Step Procedure Points 1 Remove the PCB You can remove the PCB when you disconnect the read wires on the terminal board without removing the electr...

Page 210: ...SiENBE04 507A Outdoor Unit Removal Procedure 201 4 Loosen the 4 screws 5 Undo the 3 hooks on the upper side 6 Lift and pull out the PCB Step Procedure Points Hooks...

Page 211: ...Removal Procedure 7 Feature of the PCB S70 fan motor S80 four way valve S90 thermistor outdoor air heat exchanger discharge pipe Step Procedure Points PbF Pb free soldering S90 Glass fuse 3 15A S70 Gl...

Page 212: ...SiENBE04 507A Others 203 Part 8 Others 1 Others 204 1 1 Test Run from the Remote Controller 204 1 2 Jumper Settings 205...

Page 213: ...nd Testing 1 Measure the supply voltage and make sure that it falls in the specified range 2 Trial operation should be carried out in either cooling or heating mode 3 Carry out the test operation in a...

Page 214: ...Cut the address jumper JA on the control PCB Wireless remote controller 1 Slide the front cover and take it off 2 Cut the address jumper J4 1 2 2 Jumper Setting R4417 ADDRESS JA ADDRESS JA EXIST 1 CU...

Page 215: ...Others SiENBE04 507A 206 Others...

Page 216: ...SiENBE04 507A Appendix 207 Part 9 Appendix 1 Piping Diagrams 208 1 1 Indoor Units 208 1 2 Outdoor Units 209 2 Wiring Diagrams 211 2 1 Indoor Units 211 2 2 Outdoor Units 211...

Page 217: ...MW L FTXS20 25 35D3VMW L M 4D050757 FIELD PIPING 6 4CuT FIELD PIPING 9 5CuT MAFFLER ASSY CROSS FLOW FAN FAN MOTOR THERMISTOR ON HEAT EXCH INDOOR UNIT HEAT EXCHANGER 7 9CuT 9 5CuT 6 4CuT 6 4CuT 6 4CuT...

Page 218: ...OPERATED VALVE HEAT EXCHANGER THERMISTOR PROPELLER FAN 9 5CuT 7 0CuT 6 4CuT 6 4CuT 7 0CuT 7 0CuT 9 5CuT 9 5CuT 9 5CuT 9 5CuT 7 9CuT 9 5CuT 7 9CuT 6 4CuT 4 0 ID 2 0CuT 3D047317A M 4 8CuT OUTDOOR UNIT O...

Page 219: ...OLING HEATING 4 0 ID 2 0CuT 9 5CuT 9 5CuT 9 5CuT 9 5CuT 9 5CuT 6 4CuT 6 4CuT 7 0CuT 9 5CuT 7 9CuT 6 4CuT 7 0CuT 7 0CuT 7 9CuT MUFFLER WITH FILTER MUFFLER WITH FILTER M OUTDOOR UNIT OUTDOOR TEMPERATURE...

Page 220: ...L N X1M 2 3 1 RED BLK WHT GRN YLW Z2C GRN YLW HN1 HL1 E S FU3 20A V2 PCB1 V3 SA1 L1 outdoor S80 HC2 1 C100 MRM10 MRM20 7 1 HC1 3 S11 WHT BLK BLK BLK BLK BLK BLK HR1 HN2 HL2 ORG GRY BLU 1 7 1 WHT S10...

Page 221: ...Wiring Diagrams SiENBE04 507A 212 Appendix...

Page 222: ...k No 04 144 check No 10 148 check No 11 148 check No 13 149 check No 15 149 check No 5 145 check No 6 146 check No 7 147 check No 8 147 check No 9 148 comfort airflow mode 48 compressor 198 compressor...

Page 223: ...sure control 113 high pressure control in cooling 128 HL3 42 HN3 42 horizontal blades 159 hot start function 58 I indoor heat exchanger thermistor 59 60 indoor unit PCB abnormality 112 input current c...

Page 224: ...42 202 safety precautions 79 self diagnosis digital display 58 sensor malfunction detection 73 service check function 108 shelter 183 signal receiver PCB 41 signal receiving sign 58 signal transmissio...

Page 225: ...SiENBE04 507A iv Index...

Page 226: ...eating peak cut control 67 high pressure control in cooling 128 I indoor unit PCB abnormality 112 input current control 66 input over current detection 124 installation condition check 147 insufficien...

Page 227: ...r unit 117 thermistor or related abnormality outdoor unit 133 thermistor resistance check 146 thermostat control 52 trial operation from remote controller 204 turning speed pulse input on the outdoor...

Page 228: ...amloze Vennootschap Zandvoordestraat 300 B 8400 Oostende Belgium www daikin eu BTW BE 0412 120 336 RPR Oostende The present publication is drawn up by way of information only and does not constitute a...

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