Daikin RKS35BVMB [2/170] Inverter pair inverter pair inverter pair inverter pair floor standing type floor standing type floor standing type floor standing type b series b series b series b series

Inverter pair floor standing type b series 1

Inverter pair inverter pair inverter pair inverter pair floor standing type floor standing type floor standing type floor standing type b series b series b series b series 2

Control specification 9 3

Function of main structural parts 6 3

Functions 3

Introduction v 3

Main functions 4 3

Part 1 list of functions 3

Part 2 specifications 3

Part 3 printed circuit board connector wiring diagram 3

Part 4 function and control 3 3

Printed circuit board connector wiring diagram 3

Specifications 3

Table of contents 3

Caution for diagnosis 0 2 problem symptoms and measures 1 3 service check function 2 4

Checks 04 4

Instruction 5 4

Part 5 system configuration 3 4

Part 6 service diagnosis 9 4

System configuration 4 4

Troubleshooting 3 4

Drawings flow charts v 5

Index i 5

Indoor unit 14 5

Outdoor unit 27 5

Part 7 removal procedure 13 5

Part 8 appendix 49 5

Piping diagrams 50 5

Wiring diagrams 53 5

Caution in repair 6

Introduction 6

Safety cautions 6

Warning 6

Caution 7

Cautions regarding products after repair 7

Warning 7

Caution 8

Inspection after repair 8

Warning 8

Caution 9

Icons are used to attract the attention of the reader to specific information the meaning of each icon is described in the table below 9

Using icons 9

Using icons list 9

Warning 9

Part 1 list of functions 10

Functions 11

Part 2 specifications 12

Cooling only 13

Specifications 13

Specifications si06 305 13

V 50hz 13

Heat pump 14

Si06 305 specifications 14

Specifications 5 14

V 50hz 14

Part 3 printed circuit board connector wiring diagram 16

Fvks 25 35 b fvxs 25 35 b series 17

Printed circuit board connector wiring diagram 17

Rks 25 35 bvmb rxs 25 35 bvmb 19

Detail of pcb 1 20

Detail of pcb 2 20

Control specification 9 22

Function of main structural parts 6 22

Main functions 4 22

Part 4 function and control 22

Part 4 part 4 part 4 part 4 function and control function and control function and control function and control 22

Additional control parameters 23

Drawing of inverter the following drawing shows a schematic view of the inverter principle 23

Forced cooling operation 23

Frequency principle 23

Frequency restrictions 23

Initial settings 23

Inverter principle to regulate the capacity a frequency control is needed the inverter makes it possible to vary the rotation speed of the compressor the following table explains the conversion principle 23

Main control parameters the compressor is frequency controlled during normal operation the target frequency is set by the following 2 parameters coming from the operating indoor unit 23

Main functions 23

The difference between the room temperature and the set temperature 23

The load condition of the operating indoor unit 23

The target frequency is adapted by additional parameters in the following cases 23

Comfortable air conditioning a detailed adjustment is integrated to ensure a fixed room temperature it is possible to air condition with a small room temperature variation 24

Energy saving heating and cooling once the set temperature is reached the energy saving operation enables to maintain the room temperature at low power 24

Even during extreme cold weather the high capacity is achieved it is maintained even when the outdoor air temperature is 0 c 24

Forced cooling operation for more information refer to forced operation mode on page 24

Frequency limits the following table shows the functions that define the minimum and maximum frequency 24

Inverter features the inverter provides the following features 24

Quick heating and quick cooling the compressor rotational speed is increased when starting the heating or cooling this enables a quick set temperature 24

The regulating capacity can be changed according to the changes in the outdoor air temperature and cooling heating load 24

Auto swing the following table explains the auto swing process for heating and cooling 25

Flap control 25

Louvres the louvres made of elastic synthetic resin provide a wide range of airflow that guarantees a comfortable air distribution 25

Wide angle flap the large flaps send a large volume of air all over the room the flap provides an optimum control in cooling heating and dry mode 25

Air conditioner automatically decides the appropriate blowing pattern depending on the operating mode situation 26

Air flow selection 26

During dry mode so that cold air does not come into direct contact with people air is blown upper air outlet 26

Regardless of the operating mode or situation air blows from the upper air outlet 26

Use this switch when you do not want air coming out of the lower air outlet while sleeping etc 26

When setting the air flow selection switch to 26

When setting the air outlet selection switch to 26

Automatic air flow control for cooling 27

Automatic air flow control for heating 27

Control mode the airflow rate can be automatically controlled depending on the difference between the set temperature and the room temperature this is done through phase control and hall ic control 27

Fan speed control for indoor units 27

For more information about hall ic refer to trouble shooting for fan motor on page 77 27

Function and control 27

Fvk x s 740 760 rpm during powerful operation 970 rpm 27

H hh powerful 27

Ll cooling thermostat off sl silent 27

Main functions si06 305 27

Note 1 during powerful operation fan operate h tap 50 90 rpm 2 fan stops during defrost operation 27

Phase steps phase control and fan speed control contains 9 steps lll ll sl l ml m mh h and hh 27

Step cooling heating dry mode lll heating thermostat off 27

The following drawing explains the principle for fan speed control for heating 27

The following drawing explains the principle of fan speed control for cooling 27

Within this range the airflow rate is automatically controlled when the airflow adjusting button is set to automatic 27

In case of inverter units the microcomputer automatically sets the temperature and fan settings the difference between the room temperature at startup and the temperature 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 28

Programme dry function 28

Programme dry function removes humidity while preventing the room temperature from lowering since the microcomputer controls both the temperature and air flow volume the temperature adjustment and fan adjustment buttons are inoperable in this mode 28

Automatic operation 29

Night set mode 30

Home leave operation 31

Details of the control when powerful button is pushed in each operation mode the fan speed setting temperature will be converted to the following states in a period of twenty minutes 32

Ex powerful operation in cooling mode 32

Inverter powerful operation 32

Outline in order to exploit the cooling and heating capacity to full extent operate the air conditioner by increasing the indoor fan rotating speed and the compressor frequency 32

Tpf 20min 32

Air purifying filter 33

Hot start function 33

Mold proof air filter 33

On off button on indoor unit 33

Other functions 33

Photocatalytic deodorizing filter 33

Signal receiving sign 33

Auto restart function 34

Self diagnosis digital display 34

Cooling only model 35

Function and control 35

Function of main structural parts 35

Function of main structural parts si06 305 35

Heat pump model 35

Main structural parts 35

Function of thermistor 36

Heat pump model 36

Cooling only model 37

Control specification 38

Detail 1 for heat pump model there are following modes stop cooling includes drying heating include defrosting 38

For cooling only model there are following models stop and cooling including drying 38

Function and control 29 38

Mode hierarchy 38

Note unless specified otherwise an indoor dry operation command must be regarded as cooling operation 38

Outline there are two modes the mode selected in user s place normal air conditioning mode and forced operation mode for installation and providing service 38

Si06 305 control specification 38

Frequency control 39

D signal 1 p control calculate 40

D signal and is used for frequency command 40

D signal the difference between a room temperature and the temperature set by the remote controller will be taken as the 40

D value in each sampling time 20 seconds and adjust the frequency according to its difference from the frequency previously calculated 2 i control if the operating frequency is not change more than a certain fixed time adjust the frequency up and down according to the 40

D value is large increase the frequency 3 limit of frequency variation width when the difference between input current and input current drooping value is less than 1 a the frequency increase width must be limited 4 frequency management when other controls are functioning 40

D value is small lower the frequency when the 40

D value obtaining the fixed 40

D value of the indoor unit and the q value of the indoor unit q value indoor unit output determined from indoor unit volume air flow rate and other factors 40

D value when the 40

Determine lower limit frequency 40

For limiting lower limit frequency management is carried out only when the frequency rises 5 upper and lower limit of frequency by pi control the frequency upper and lower limits are set depending on indoor unit when low noise commands come from the indoor unit or when outdoor unit low noise or quiet commands come from indoor unit the upper limit frequency must be lowered than the usual setting 40

Frequency initial setting 40

Indoor frequency command 40

Outline when starting the compressor or when conditions are varied due to the change of the room the frequency must be initialized according to the 40

Pi control determine frequency up down by 40

Set a maximum value as an lower limit frequency among the frequency lower limits of the following functions pressure difference upkeep 4 determine prohibited frequency 40

Th off thermostat off 40

There is a certain prohibited frequency such as a power supply frequency 40

When frequency is drooping frequency management is carried out only when the frequency droops 40

3 minutes stand by 41

Compressor protection function 41

Controls at mode changing start up 41

Four way valve operation compensation 41

Four way valve switching 41

Preheating operation 41

Discharge pipe control 42

Input current control 42

Freeze up protection control 43

Heating peak cut control 43

Fan control 44

Moisture protection function 1 securing of differential pressure and blown air temperature 44

Actual constant 45

Common setting for 25 35 class 45

Detail 45

Doa outdoor air temperature cgc compressor guard for cooling cgw compressor guard for heating fcg frequency guard for compressor protection 45

Moisture protection function 2 45

Operation stop depending on the outdoor air temperature compressor operation turns off under the conditions that the system is in cooling operation and outdoor air temperature is below 10 c 45

Outline in order to obtain the dependability of the compressor the compressor must be stopped according to the conditions of the temperature of the outdoor air and outdoor heat exchanger 45

The set of a constant doa1cg doa2cg doa3cg fcg7 and fcg8 have constants for cooling heating separately and these constants are distinguished with a suffix c w 45

Defrost control 46

Detail conditions for starting defrost the starting conditions must be made with the 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 44 minutes of accumulated time pass since the start of the operation or ending the defrosting conditions for canceling defrost the judgment must be made with heat exchanger temperature 4 c 22 c 46

Function and control 37 46

Outline heat pump only defrosting is carried out by the cooling cycle reverse cycle the defrosting time or outdoor heat exchanger temperature must be more than its fixed value when finishing 46

Si06 305 control specification 46

Control specification si06 305 47

Detail the followings are the examples of control which function in each mode by the electronic expansion valve control 47

Electronic expansion valve control 47

Function and control 47

Outline the following items are included in the electronic expansion valve control electronic expansion valve is fully closed 1 electronic expansion valve is fully closed when turning on the power 2 pressure equalizing control open control 1 electronic expansion valve control when starting operation 2 control when frequency changed 3 control for defrosting only for heat pump model 4 control when a discharge pipe temperature is abnormally high 5 control when the discharge pipe thermistor is disconnected feedback control 1 discharge pipe temperature control 47

Disconnection of the discharge pipe thermistor 48

Fully closing with power on 48

High temperature of the discharge pipe 48

Opening limit 48

Pressure equalization control 48

Starting operation control 48

Control when frequency is changed 49

Target discharge pipe temperature control 49

Detection of over load and over current 50

Insufficient gas control 50

Malfunctions 50

Sensor malfunction detection 50

Additional function 51

Compressor operating frequency is increased to p1 max max hz of operating room and outdoor unit airflow rate is increased 51

Detail forced cooling 51

Forced operation mode 51

Outline forced operating mode includes only forced cooling 51

Power supply voltage is detected each time equipment operation starts 51

Powerful operation mode 51

Voltage detection function 51

Instruction 5 52

Part 5 part 5 part 5 part 5 system configuration system configuration system configuration system configuration 52

Part 5 system configuration 52

System configuration 4 52

Operation instructions 53

System configuration 53

Caution 54

Instruction 54

Safety precautions 54

Warning 54

Consider nuisance to your neighbours from noises 55

Electrical work 55

Installation site 55

Instruction si06 305 55

System configuration 55

System relocation 55

Caution 56

I indoor unit 56

I opening the front grille 56

Names of parts 56

I outdoor unit 57

Iiii outdoor unit 57

Indoor unit 57

Arc433a5 a6 58

I remote controller 58

I to set the batteries 59

Preparation before operation 59

Attention 60

Choose a place from where the sig nals reach the unit 60

Fix the holder to a wall a pillar etc with the screws supplied with the holder 60

I to fix the remote controller holder on the wall 60

I to operate the remote controller 60

Place the remote controller in the remote controller holder 60

Preparation before operation 60

Careful not to cool heat the room too much keeping the temperature setting at a moderate level helps save energy 61

Clogged air filters cause inefficient operation and waste energy clean them once in about every two weeks 61

Cover windows with a blind or a curtain blocking sunlight and air from outdoors increases the cooling heating effect 61

I to set the clock 61

I turn the breaker on 61

If you are not going to use the air conditioner for a long period for example in spring or autumn turn the breaker off 61

Instruction si06 305 61

Operation outside this humidity or temperature range may cause a safety device to disable the system 61

Press clock button 61

Press timer setting button to set the clock to the present time 61

Silent 61

System configuration 61

The air conditioner always consumes 15 35 watts of electricity even while it is not operating 61

Use the air conditioner in the following conditions 61

Auto dry cool heat fan operation 62

I to change the temperature setting 62

I to start operation 62

I to stop operation 62

I to change the air flow direction 63

I to change the air flow rate setting 63

Press fan setting button 63

Adjusting the air flow direction 64

Attention 64

I to adjust the horizontal blade flap 64

I to adjust the vertical blades louvres 64

Notes on flap and louvers angle 64

Caution 65

I air flow selection 65

When setting the air flow selection switch to 65

When setting the air outlet selection switch to 65

I to cancel powerful operation 66

I to start powerful operation 66

Powerful operation 66

Outdoor unit silent operation 67

Before using home leave operation 68

Home leave operation 68

I to cancel home leave operation 68

I to start home leave operation 68

To set the temperature and air flow rate for home leave operation 68

I useful in these cases 69

I what s the home leave operation 69

Use as a favorite mode 69

Use as an energy saving mode 69

I to cancel the off timer operation 70

I to use off timer opera tion 70

Timer operation 70

Attention 71

I to cancel on timer operation 71

I to combine on timer and off timer 71

I to use on timer operation 71

Press cancel button 71

Press on timer button 71

Press on timer button again 71

Press timer setting button until the time setting reaches the point you like 71

Care and cleaning 72

Caution 72

I front grille 72

I indoor unit outdoor unit and remote controller 72

Filters 73

I air filter 73

I air purifying filter green 73

Maintenance 73

Photocatalytic deodorizing filter gray 73

Replacement 73

Air purifying filter with frame 74

Air purifying filter without frame 74

Clean the air filters and set them again 74

Dispose of old air filters as non burnable waste and 74

Filters as burnable waste 74

I before a long idle period 74

Operate the fan only for several hours on a fine day to dry out the inside 74

Photocatalytic deodorizing filter with frame 74

Photocatalytic deodorizing filter without frame 74

Press mode button and select fan operation 74

Press on off button and start operation 74

Take out batteries from the remote controller 74

The paper material is torn or broken during cleaning 74

Turn off the breaker for the room air conditioner 74

Case explanation 75

These cases are not troubles 75

Trouble shooting 75

Case check 76

Check again 76

Call the service shop immediately 77

Disposal requirements 77

I the power cord is abnormally hot or damaged i an abnormal sound is heard during operation i the safety breaker a fuse or the earth leakage breaker cuts off the operation frequently i a switch or a button often fails to work properly i there is a burning smell i water leaks from the indoor unit 77

Turn the breaker off and call the service shop 77

Warning 77

We recommend periodical maintenance 77

Caution for diagnosis 0 2 problem symptoms and measures 1 3 service check function 2 78

Checks 04 78

Part 6 part 6 part 6 part 6 service diagnosis service diagnosis service diagnosis service diagnosis 78

Part 6 service diagnosis 78

Troubleshooting 3 78

Caution for diagnosis 79

Problem symptoms and measures 80

Arc433 series 81

In the arc433a series the temperature display sections on the main unit indicate corresponding codes 1 when the timer cancel button is held down for 5 seconds a 00 indication flashes on the temperature display section 81

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 seconds the code display also cancels itself if the button is not pressed for 1 minute 81

Press the timer cancel button repeatedly until a continuous beep is produced 81

Service check function 81

The code indication changes in the sequence shown below and notifies with along beep 81

Displayed only when system down occurs 82

Error codes and description 82

Troubleshooting 82

Indoor unit pcb abnormality 83

Freeze up protection control or high pressure control 84

Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 85

Check no refer to p 07 85

Note if the outdoor air temperature is below 10 c in the cooling mode the system may get interrupted with error a5 displayed the system will be reset itself but this stop will be put in the error history memory 85

Service diagnosis 85

Troubleshooting 85

Troubleshooting si06 305 85

Fan motor dc motor or related abnormality 86

Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 87

Check no 1 refer to p 04 87

Check no 2 refer to p 04 87

Service diagnosis 87

Troubleshooting 87

Troubleshooting si06 305 87

Thermistor or related abnormality indoor unit 88

Check no refer to p 04 89

Detection error by broken relay harness or disconnected connector 89

Detection error due to defective pcb 2 89

Foreign substance in blow port 89

Malfunction decision conditions 89

Method of malfunction detection 89

Remote controller display 89

Service diagnosis 89

Shutter drive motor defective 89

Shutter drive motor shutter limit switch abnormality 89

Shutter itself deformed warped 89

Shutter limit switch defective 89

Shutter s sealing material too thick 89

Supposed causes 89

The shutter open close performance is detected by the limit switch attached on its structure in this way the shutter drive motor and the shutter limit switch are checked for failure 89

Troubleshooting 89

Troubleshooting si06 305 89

When the shutter is open the limit switch is closed or vice versa 89

Signal transmission error between indoor and outdoor units 90

A compressor overload is detected through compressor ol 91

Check no 1 refer to p 10 91

Check no refer to p 05 91

Check no refer to p 06 91

Check no refer to p 07 91

Electronic expansion valve defective 91

Four way valve malfunctioning 91

If the compressor ol is activated twice the system will be shut down 91

Malfunction decision conditions 91

Method of malfunction detection 91

Ol activation compressor overload 91

Outdoor unit pcb defective 91

Refrigerant shortage 91

Remote controller display 91

Service diagnosis 91

Stop valve defective 91

Supposed causes 91

The error counter will reset itself if this or any other error does not occur during the following 60 minute compressor running time total time 91

The operating temperature condition is not specified 91

Troubleshooting 91

Troubleshooting si06 305 91

Water mixed in the local piping 91

A compressor lock is detected by checking the compressor running condition through the position detection circuit 92

Clearing condition continuous run for about 5 minutes normal 92

Compressor lock 92

Compressor locked 92

Malfunction decision conditions 92

Method of malfunction detection 92

Note if the model doesn t have spm replace the outdoor unit pcb 92

Remote controller display 92

Service diagnosis 83 92

Si06 305 troubleshooting 92

Supposed causes 92

The system judges the compressor lock and cannot operation with position detection within 15 seconds after start up 92

The system judges the compressor lock and stops due to over current 92

The system will be shut down if the error occurs 16 times 92

Troubleshooting 92

An input over current is detected by checking the input current value being detected by ct with the compressor running 93

Check no refer to p 08 93

Error detection due to outdoor unit pcb 93

Input over current detection 93

Malfunction decision conditions 93

Method of malfunction detection 93

Note if the model doesn t have spm replace the outdoor unit pcb 93

Over current due to compressor failure 93

Over current due to defective outdoor unit pcb 93

Over current due to defective power transistor 93

Over current due to short circuit 93

Remote controller display 93

Service diagnosis 93

Supposed causes 93

The following ct input with the compressor running continues for 2 seconds cooling above 11a heating above 13a 93

Troubleshooting 93

Troubleshooting si06 305 93

Four way valve abnormality 94

Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 95

Check no 1 refer to p 10 95

Check no refer to p 06 95

Check no refer to p 07 95

Service diagnosis 95

Troubleshooting 95

Troubleshooting si06 305 95

Discharge pipe temperature control 96

A compressor startup failure is detected by checking the compressor running condition through the position detection circuit 97

Check no 3 refer to p 11 97

Clearing condition continuous run for about 5 minutes normal 97

Compressor itself defective 97

Compressor relay cable disconnected 97

Input voltage out of specification 97

Malfunction decision conditions 97

Method of malfunction detection 97

Outdoor unit pcb defective 97

Position sensor abnormality 97

Remote controller display 97

Service diagnosis 97

Stop valve closed 97

Supposed causes compressor relay cable disconnected 97

The compressor fails to start in about 15 seconds after the compressor run command signal is sent 97

The system will be shut down if the error occurs 16 times 97

Troubleshooting 97

Troubleshooting si06 305 97

Ct or related abnormality 98

Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 99

Check no 2 refer to p 11 99

Note if the model doesn t have spm replace the outdoor unit pcb 99

Service diagnosis 99

Troubleshooting 99

Troubleshooting si06 305 99

P4 j3 j6 h9 100

Thermistor or related abnormality outdoor unit 100

Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 101

Check no refer to p 07 101

P4 radiation fin thermistor j3 discharge pipe temperature thermistor j6 outdoor unit heat exchanger temperature thermistor h9 outdoor air temperature thermistor 101

Service diagnosis 101

Troubleshooting 101

Troubleshooting si06 305 101

Electrical box temperature rise 102

Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 103

Check no refer to p 07 103

Check no refer to p 08 103

Check no refer to p 09 103

Service diagnosis 103

Troubleshooting 103

Troubleshooting si06 305 103

Radiation fin temperature rise 104

Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 105

Check no refer to p 07 105

Check no refer to p 08 105

Check no refer to p 09 105

Service diagnosis 105

Troubleshooting 105

Troubleshooting si06 305 105

Output over current detection 106

Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 107

Check no 3 refer to p 11 107

Check no refer to p 08 107

Note if the model doesn t have spm replace the outdoor unit pcb 107

Service diagnosis 107

Troubleshooting 107

Troubleshooting si06 305 107

Insufficient gas 108

Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 109

Check no refer to p 05 109

Check no refer to p 07 109

Service diagnosis 109

Troubleshooting 109

Troubleshooting si06 305 109

An abnormal voltage rise is detected by checking the specified over voltage detection circuit 110

An over voltage signal is fed from the over voltage detection circuit to the microcomputer the voltage is over 400v 110

Clearing condition continuous run for about 60 minutes normal 110

Malfunction decision conditions 110

Method of malfunction detection 110

Note if the model doesn t have spm replace the outdoor unit pcb 110

Over voltage detection 110

Over voltage detection circuit defective 110

Pam control part s defective 110

Remote controller display 110

Service diagnosis 101 110

Si06 305 troubleshooting 110

Supply voltage not as specified 110

Supposed causes 110

The system will be shut down if the error occurs 5 times 110

Troubleshooting 110

High pressure control in cooling 111

Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 112

Check no refer to p 05 112

Check no refer to p 07 112

Check no refer to p 08 112

Check no refer to p 09 112

Service diagnosis 103 112

Si06 305 troubleshooting 112

Troubleshooting 112

Check no 1 1 check connector connection 2 check motor power supply voltage output pins 4 7 and 4 8 3 check motor control voltage pins 4 3 4 check rotation command voltage output pins 4 2 5 check rotation pulse input pins 4 1 113

Check no 2 1 check connector connection 2 check motor control voltage output pins 2 1 113

Check no remove the front grille the limit switch is located at the left side of the drain pan assembly check the continuity of the switch connection 113

Checks 113

Fan motor connector output check 113

How to check 113

Limit switch continuity check 113

The shutter can be opened and closed with hand keep the shutter open and closed all the way for each continuity check steps 113

Electronic expansion valve check 114

Check no 115

Checks si06 305 115

Four way valve performance check 115

Service diagnosis 115

Check no remove the connectors of the thermistors 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 116

Thermistor resistance check 116

Check no 117

Checks si06 305 117

Discharge pressure check 117

Installation condition check 117

Service diagnosis 117

Check no 118

Outdoor unit fan system check with ac motor 118

Service diagnosis 109 118

Si06 305 checks 118

Check no 0 measure the power supply waveform between pins 1 and 3 on the terminal board and check the waveform disturbance 119

Check no 1 119

Check to see if the power supply waveform is a sine wave fig 119

Check to see if there is waveform disturbance near the zero cross sections circled in fig 119

Checks si06 305 119

Fig fig 119

Inverter units refrigerant system check 119

Power supply waveforms check 119

Service diagnosis 119

Before measuring operate the unit for several minutes then shut down the operation by force using the circuit breaker 120

Capacitor voltage check 120

Check no 3 120

Disconnect the compressor harness connector from the outdoor unit pcb to disengage the connector press the protrusion on the connector then follow the procedure below to measure resistance between power transistor and and the u v and w terminals of the compressor connector with a multi tester evaluate the measurement results for a pass fail judgment 120

If the unit is shut down using the remote controller instead of the circuit breaker the capacitor discharges the electric load thus disallowing accurate measurement 120

Note check to make sure that the voltage between the terminal of power transistor and is approx 0 volt before checking power transistor 120

Note the charge section is applied with high voltage therefore exercise caution during measurement to prevent electric shock 120

Power transistor check 120

Since capacitor and are connected to power transistor and capacitor voltage can be measured at the power transistor and terminals 120

Take measurements 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 120

Hall ic check 121

Indoor unit 14 122

Outdoor unit 27 122

Part 7 part 7 part 7 part 7 removal procedure removal procedure removal procedure removal procedure 122

Part 7 removal procedure 122

Indoor unit 123

Removal of the air filter front panel 123

Press down the two hooks located at left and right side upper parts of the air filter then bend slightly the air filter to remove it 124

Unhook the chain 124

Disengage the three hooks on the bottom of the front panel 125

Mounting screw m4 16 125

Remove the four screws to take out the front grille 125

Removal of the horizontal blade 126

Removal of the electrical box 127

Illustration shows parts in the electrical box 129

Mounting screw m4 16 129

To remove the electrical box dismount the two fixing screws and pull out the box forward 129

Removal of the pcb 130

Removal of the heat exchanger 132

Removal of the fan rotor fan motor 134

Outdoor unit 136

Removal of external casing 136

Removal of bellmouth and left side plate 138

Removal of pcb and electrical box 139

Disconnect the three wires from the pcb 141

The pcb has eight hooks 141

Undo the eight hooks and the pcb can be disengaged 141

Lift and remove the electrical box 143

Remove the molded interconnect device mid 143

Remove the one screw fixing the mid 143

Slide the mid upward and release 144

Removal of propeller fan and fan motor 145

Remove the fan motor 146

Removal of compressor noise absorption pad 147

Procedure warning be sure to turn off all power supplies at least 10 min before disassembling work 149

Pull the partition plate upward to remove 149

Removal of partition plate and reactor 149

Remove the two screws fixing the partition plate 149

Slide the reactor assembly this side and release 151

Removal of four way valve and motor valve 152

Removal of compressor 155

Remove the four way valve and the motor valve also so as not to be burnt out 156

Remove the nut by an open end wrench 156

The mounting nut for the compressor is only one piece 156

Part 8 appendix 158

Fvks25bvmb fvks35bvmb fvxs25bvmb fvxs35bvmb 159

Indoor units 159

Piping diagrams 159

Appendix 151 160

Outdoor units 160

Rks25bvmb 160

Rks35bvmb 160

Si06 305 piping diagrams 160

Appendix 161

Piping diagrams si06 305 161

Rxs25bvmb 161

Rxs35bvmb 161

Appendix 153 162

Fvks25bvmb fvks35bvmb fvxs25bvmb fvxs35bvmb 162

Indoor units 162

Si06 305 wiring diagrams 162

Wiring diagrams 162

Appendix 163

Outdoor units 163

Rks25bvmb rks35bvmb cooling only 163

Rxs25bvmb rxs35bvmb heat pump 163

Wiring diagrams si06 305 163

Index index index index 164

Numerics 164

Drawings flow charts 168

Drawings flow charts drawings flow charts drawings flow charts drawings flow charts 168

For further improvement specifications or designs are subject to change without prior notice 170

Printed in japan 0 6 2003 ak cos 170

Daikin RKS35BVMB [2/170] Inverter pair inverter pair inverter pair inverter pair floor standing type floor standing type floor standing type floor standing type b series b series b series b series

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