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Daikin RXS25K3V1B Service Manual Download Page 79

SiBE05-722EE

Troubleshooting

Service Diagnosis

69

4.5

Thermistor or Related Abnormality (Indoor Unit)

Error Code

C4

, 

C9

Method of Error 
Detection

The temperatures detected by the thermistors determine thermistor errors.

Error Decision 
Conditions

The voltage between the both ends of the thermistor is 4.96 V and more or 0.04 V and less 
during compressor operation.

Supposed 
Causes

„

Disconnection of connector

„

Thermistor corresponding to the error code is defective.

„

Defective indoor unit PCB

Troubleshooting

Check No.01

Refer to P.102

C4

 : Indoor heat exchanger thermistor

C9

 : Room temperature thermistor

YES

(R21870)

NO

Check No. 01

Check the thermistor resistance 
value.

YES

NO

Caution

Correct the connection.

Replace the defective 
thermistor.

Replace the indoor unit PCB 
(control PCB).

Normal?

Normal?

Check the connection of 
connectors.

Be sure to turn off the power switch before connecting or disconnecting 
connectors, or parts may be damaged.

Summary of Contents for RXS25K3V1B

Page 1: ...Service Manual Inverter Pair Floor Ceiling Suspended Dual Type FLK X S BA Series SiBE05 722EE Applicable Models O Inverter Pair Cooling Only O Inverter Pair Heat Pump ...

Page 2: ...S25BAVMB FLKS35BAVMB Outdoor Unit RKS25E2V1B RKS25G2V1B RKS35E2V1B RKS35G2V1B RKS25G2V1B9 RKS35G2V1B9 zHeat Pump Indoor Unit FLXS25BAVMB FLXS35BAVMB9 FLXS35BAVMB Outdoor Unit RXS25E2V1B RXS25G2V1B RXS25J2V1B RXS25L2V1B RXS35E2V1B RXS35G2V1B RXS35J2V1B RXS35L2V1B RXS25G2V1B9 RXS25K3V1B RXS25L3V1B RXS35G2V1B9 RXS35K2V1B RXS35L3V1B ...

Page 3: ... 4 Functions and Control 28 1 Main Functions 29 1 1 Temperature Control 29 1 2 Frequency Principle 29 1 3 Airflow Direction Control 31 1 4 Fan Speed Control for Indoor Unit 31 1 5 Program Dry Operation 32 1 6 Automatic Operation 33 1 7 Thermostat Control 34 1 8 NIGHT SET Mode 35 1 9 HOME LEAVE Operation 36 1 10 Inverter POWERFUL Operation 37 1 11 Clock Setting 38 1 12 Other Functions 39 2 Thermist...

Page 4: ...it 76 4 10 Outdoor Unit PCB Abnormality 77 4 11 OL Activation Compressor Overload 79 4 12 Compressor Lock 81 4 13 DC Fan Lock 82 4 14 Input Overcurrent Detection 83 4 15 Four Way Valve Abnormality 84 4 16 Discharge Pipe Temperature Control 86 4 17 High Pressure Control in Cooling 87 4 18 Compressor System Sensor Abnormality 88 4 19 Position Sensor Abnormality 89 4 20 DC Voltage Current Sensor Abno...

Page 5: ...oling Operation 116 2 Trial Operation 118 3 Field Settings 119 3 1 When 2 Units are Installed in 1 Room 119 3 2 Facility Setting Jumper cooling at low outdoor temperature 120 3 3 Jumper and Switch Settings 121 4 Silicone Grease on Power Transistor Diode Bridge 122 Part 8 Appendix 123 1 Piping Diagrams 124 1 1 Indoor Unit 124 1 2 Outdoor Unit 125 2 Wiring Diagrams 128 2 1 Indoor Unit 128 2 2 Outdoo...

Page 6: ...arding Safety of Workers Warning Do not store equipment in a room with fire sources e g naked flames gas appliances electric heaters Be sure to disconnect the power cable from the socket before disassembling equipment for repair Working on equipment that is connected to the power supply may cause an electrical shock If it is necessary to supply power to the equipment to conduct the repair or inspe...

Page 7: ...n the refrigerant system If air enters the refrigerant system an excessively high pressure results causing equipment damage and injury Warning Caution Do not repair electrical components with wet hands Working on the equipment with wet hands may cause an electrical shock Do not clean the air conditioner with water Washing the unit with water may cause an electrical shock Be sure to provide an eart...

Page 8: ...ive heat generation or fire Be sure to use an exclusive power circuit for the equipment and follow the local technical standards related to the electrical equipment the internal wiring regulations and the instruction manual for installation when conducting electrical work Insufficient power circuit capacity and improper electrical work may cause an electrical shock or fire Be sure to use the speci...

Page 9: ... not conducted securely the equipment may fall and cause injury Check to make sure that the power cable plug is not dirty or loose then insert the plug into a power outlet securely If the plug is dusty or has a loose connection it may cause an electrical shock or fire When replacing the coin battery in the remote controller be sure to dispose of the old battery to prevent children from swallowing ...

Page 10: ...room and wet the furniture and floor Do not tilt the unit when removing it The water inside the unit may spill and wet the furniture and floor Caution Icon Type of Information Description Warning Warning A Warning is used when there is danger of personal injury Caution Caution A Caution is used when there is danger that the reader through incorrect manipulation may damage equipment lose data get a...

Page 11: ...SiBE05 722EE List of Functions 1 Part 1 List of Functions 1 Functions 2 ...

Page 12: ...f diagnosis digital LED display z z Auto swing right and left Wiring error check function 3 D airflow Anti corrosion treatment of outdoor heat exchanger z z Comfort Control Auto fan speed z z Indoor unit quiet operation z z Flexibility Multi split split type compatible indoor unit z z NIGHT QUIET mode automatic OUTDOOR UNIT QUIET operation manual z z Flexible power supply correspondence INTELLIGEN...

Page 13: ...nosis digital LED display z z Auto swing right and left Wiring error check function 3 D airflow Anti corrosion treatment of outdoor heat exchanger z z Comfort Control Auto fan speed z z Indoor unit quiet operation z z Flexibility Multi split split type compatible indoor unit z z NIGHT QUIET mode automatic OUTDOOR UNIT QUIET operation manual z z Flexible power supply correspondence INTELLIGENT EYE ...

Page 14: ...agnosis digital LED display z z Auto swing right and left Wiring error check function 3 D airflow Anti corrosion treatment of outdoor heat exchanger z z Comfort Control Auto fan speed z z Indoor unit quiet operation z z Flexibility Multi split split type compatible indoor unit z z NIGHT QUIET mode automatic OUTDOOR UNIT QUIET operation manual z z Flexible power supply correspondence INTELLIGENT EY...

Page 15: ...lf diagnosis digital LED display z z Auto swing right and left Wiring error check function 3 D airflow Anti corrosion treatment of outdoor heat exchanger z z Comfort Control Auto fan speed z z Indoor unit quiet operation z z Flexibility Multi split split type compatible indoor unit z z NIGHT QUIET mode automatic OUTDOOR UNIT QUIET operation manual z z Flexible power supply correspondence INTELLIGE...

Page 16: ... down z z Self diagnosis digital LED display z z Auto swing right and left Wiring error check function 3 D airflow Anti corrosion treatment of outdoor heat exchanger z z Comfort Control Auto fan speed z z Indoor unit quiet operation z z Flexibility Multi split split type compatible indoor unit z z NIGHT QUIET mode automatic OUTDOOR UNIT QUIET operation manual z z Flexible power supply corresponden...

Page 17: ...SiBE05 722EE Specifications 7 Part 2 Specifications 1 Specifications 8 1 1 Cooling Only 8 1 2 Heat Pump 11 ...

Page 18: ...vable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 33 0 32 0 31 0 38 0 36 0 35 Power Consumption Rated W 70 70 70 78 78 78 Power Factor 96 4 95 1 94 1 93 3 94 2 92 9 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 490 1 050 200 490 1 050 200 Packaged Dimensions H W D mm 280 1 100 566 280 1 100 566 Weight Mass kg 16 16 Gross Wei...

Page 19: ...ew Proof Removable Washable Mildew Proof Running Current Rated A 0 33 0 32 0 31 0 38 0 36 0 35 Power Consumption Rated W 70 70 70 78 78 78 Power Factor 96 4 95 1 94 1 93 3 94 2 92 9 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 490 1 050 200 490 1 050 200 Packaged Dimensions H W D mm 280 1 100 566 280 1 100 566 Weight Mass kg 16 16 Gross Weight Gross Mass kg 2...

Page 20: ...w Proof Removable Washable Mildew Proof Running Current Rated A 0 33 0 32 0 31 0 38 0 36 0 35 Power Consumption Rated W 70 70 70 78 78 78 Power Factor 96 4 95 1 94 1 93 3 94 2 92 9 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 490 1 050 200 490 1 050 200 Packaged Dimensions H W D mm 280 1 100 566 280 1 100 566 Weight Mass kg 16 16 Gross Weight Gross Mass kg 22...

Page 21: ...e Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 33 0 32 0 31 0 36 0 34 0 33 0 38 0 36 0 35 0 38 0 36 0 35 Power Consumption Rated W 70 70 70 74 74 74 78 78 78 78 78 78 Power Factor 96 4 95 1 94 1 93 4 94 6 93 4 93 3 94 2 92 9 93 3 94 2 92 9 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 490 1 050 200 490 1 050 200 Packaged Dime...

Page 22: ...e Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 33 0 32 0 31 0 36 0 34 0 33 0 38 0 36 0 35 0 38 0 36 0 35 Power Consumption Rated W 70 70 70 74 74 74 78 78 78 78 78 78 Power Factor 96 4 95 1 94 1 93 4 94 6 93 4 93 3 94 2 92 9 93 3 94 2 92 9 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 490 1 050 200 490 1 050 200 Packaged Dimensions H ...

Page 23: ...le Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 33 0 32 0 31 0 36 0 34 0 33 0 38 0 36 0 35 0 38 0 36 0 35 Power Consumption Rated W 70 70 70 74 74 74 78 78 78 78 78 78 Power Factor 96 4 95 1 94 1 93 4 94 6 93 4 93 3 94 2 92 9 93 3 94 2 92 9 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 490 1 050 200 490 1 050 200 Packaged Dimensions H...

Page 24: ...ble Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 33 0 32 0 31 0 36 0 34 0 33 0 38 0 36 0 35 0 38 0 36 0 35 Power Consumption Rated W 70 70 70 74 74 74 78 78 78 78 78 78 Power Factor 96 4 95 1 94 1 93 4 94 6 93 4 93 3 94 2 92 9 93 3 94 2 92 9 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 490 1 050 200 490 1 050 200 Packaged Dimensions ...

Page 25: ...ble Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 33 0 32 0 31 0 36 0 34 0 33 0 38 0 36 0 35 0 38 0 36 0 35 Power Consumption Rated W 70 70 70 74 74 74 78 78 78 78 78 78 Power Factor 96 4 95 1 94 1 93 4 94 6 93 4 93 3 94 2 92 9 93 3 94 2 92 9 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 490 1 050 200 490 1 050 200 Packaged Dimensions ...

Page 26: ...ble Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 33 0 32 0 31 0 36 0 34 0 33 0 38 0 36 0 35 0 38 0 36 0 35 Power Consumption Rated W 70 70 70 74 74 74 78 78 78 78 78 78 Power Factor 96 4 95 1 94 1 93 4 94 6 93 4 93 3 94 2 92 9 93 3 94 2 92 9 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 490 1 050 200 490 1 050 200 Packaged Dimensions ...

Page 27: ... Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 33 0 32 0 31 0 36 0 34 0 33 0 38 0 36 0 35 0 38 0 36 0 35 Power Consumption Rated W 70 70 70 74 74 74 78 78 78 78 78 78 Power Factor 96 4 95 1 94 1 93 4 94 6 93 4 93 3 94 2 92 9 93 3 94 2 92 9 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 490 1 050 200 490 1 050 200 Packaged Dimensions H W...

Page 28: ... Wiring Diagram Part 3 Printed Circuit Board Connector Wiring Diagram 1 Indoor Unit 19 2 Outdoor Unit 21 2 1 RK X S25 35E2V1B 21 2 2 RK X S25 35G2V1B 23 2 3 RK X S25 35G2V1B9 RXS25 35J2V1B RXS25K3V1B RXS35K2V1B RXS25 35L2V1B 25 2 4 RXS25 35L3V1B 27 ...

Page 29: ...lized control HA 4 S24 Connector for display PCB 5 S26 Connector for signal receiver PCB 6 S32 Connector for indoor heat exchanger thermistor 7 S37 Connector for power supply PCB 8 JA Address setting jumper Refer to page 119 for details 9 JB Fan speed setting when compressor stops for thermostat OFF Refer to page 121 for details 10 JC Power failure recovery function Refer to page 121 for details 1...

Page 30: ...nector for AC fan motor 4 V1 Varistor 5 FU1 Fuse 3 15 A 250 V S36 FU1 H2 H3 H4 H5 H6 H1 V1 2P084361 1 1 S25 Connector for control PCB 2 LED1 H1P LED for operation green 3 LED2 H2P LED for timer yellow 4 LED3 H3P LED for HOME LEAVE operation red LED3 LED2 LED1 S25 2P084377 5 1 S27 Connector for control PCB 2 S31 RTH Connector for room temperature thermistor 3 SW1 S1W Forced cooling operation ON OFF...

Page 31: ...d protector 5 S70 Connector for fan motor 6 S80 Connector for four way valve coil 7 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 8 HC3 HC4 HL3 HN3 Connector for filter PCB 9 HR2 Connector for reactor 10 FU1 FU2 Fuse 3 15 A 250 V 11 LED A LED for service monitor green 12 V1 Varistor 13 J5 Jumper for improvement of defrost performance Refer to page 121 for ...

Page 32: ...Filter PCB PCB1 1 S11 Connector for main PCB 2 HL1 HN1 S Connector for terminal board 3 E Terminal for earth wire 4 HC1 HC2 HL2 HN2 Connector for main PCB 5 HR1 Connector for reactor 6 FU3 Fuse 20 A 250 V 7 V2 V3 Varistor HC2 V3 V2 FU3 3P143310 1 E HL1 HN1 S HR1 HN2 HC1 S11 HL2 ...

Page 33: ...nnector for magnetic relay 6 S70 Connector for fan motor 7 S80 Connector for four way valve coil 8 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 9 HL3 HN3 Connector for filter PCB 10 HR2 Connector for reactor 11 FU1 FU2 Fuse 3 15 A 250 V 12 LED A LED for service monitor green 13 V1 Varistor 14 J5 Jumper for improvement of defrost performance Refer to page ...

Page 34: ...nnector for main PCB 2 HL1 HN1 S Connector for terminal board 3 E1 Terminal for earth wire 4 E2 Connector for terminal board earth 5 HL2 HN2 Connector for main PCB 6 HR1 Connector for reactor 7 FU3 Fuse 20 A 250 V 8 V2 V3 Varistor E1 E2 V2 FU3 HL1 HN1 S to S50 on main PCB HL2 S11 HN2 HR1 3P203203 1 V3 ...

Page 35: ...ector for magnetic relay 5 S70 Connector for fan motor 6 S80 Connector for four way valve coil 7 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 8 S100 Connector for forced operation button PCB 9 HL3 HN3 Connector for filter PCB 10 HR2 Connector for reactor 11 U V W Connector for compressor 12 FU2 Fuse 3 15 A 250 V 13 LED A LED for service monitor green 14 V...

Page 36: ...or for terminal board 3 E1 E2 Terminal for earth wire 4 HL2 HN2 Connector for main PCB 5 HR1 Connector for reactor 6 FU1 Fuse 3 15 A 250 V 7 FU3 Fuse 20 A 250 V 8 V2 V3 Varistor HR1 HL2 3P254234 1 FU1 HN2 S FU3 AC2 E1 E2 AC1 S11 V3 V2 S50 on main PCB 1 S110 Connector for main PCB 2 SW1 Forced cooling operation ON OFF button Refer to page 116 for details SW1 S110 3P255755 1 ...

Page 37: ... S71 Connector for DC fan motor 6 S80 Connector for four way valve coil 7 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 8 E1 E2 Terminal for earth wire 9 HL1 HN1 S Connector for terminal board 10 HR1 HR2 Connector for reactor 11 FU1 FU2 Fuse 3 15 A 250 V 12 FU3 Fuse 20 A 250 V 13 LED A LED for service monitor green 14 V2 V3 V150 Varistor FU3 S HL1 HN1 FU1 ...

Page 38: ...Operation 36 1 10 Inverter POWERFUL Operation 37 1 11 Clock Setting 38 1 12 Other Functions 39 2 Thermistor Functions 40 3 Control Specification 41 3 1 Mode Hierarchy 41 3 2 Frequency Control 42 3 3 Controls at Mode Changing Start up 44 3 4 Discharge Pipe Temperature Control 46 3 5 Input Current Control 47 3 6 Freeze up Protection Control 48 3 7 Heating Peak cut Control 48 3 8 Outdoor Fan Control ...

Page 39: ...e frequency of the compressor is controlled by the following 2 parameters The load condition of the operating indoor unit The difference between the room thermistor temperature and the target temperature The target frequency is adapted by additional parameters in the following cases Frequency restrictions Initial settings Forced cooling operation Inverter Principle To regulate the capacity a frequ...

Page 40: ...Once the set temperature is reached the energy saving operation enables to maintain the room temperature at low power Frequency Limits The following functions regulate the minimum and maximum frequency Forced Cooling Operation Refer to page 116 for details Refrigerant circulation rate high high f low f freq variable Refrigerant circulation rate low high speed low speed R2812 Amount of heat exchang...

Page 41: ...fan speed control the step SL is not available The airflow rate is automatically controlled within this range when the FAN setting button is set to automatic Cooling The following drawing explains the principle of fan speed control for cooling Heating In heating operation the fan speed is regulated according to the indoor heat exchanger temperature and the difference between the room thermistor te...

Page 42: ...d the target temperature is divided into two zones Then the unit operates in an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable level Thermostat turns on also when the room temperature is in the zone B for 10 minutes Room thermistor temperature at start up Target temperature X Thermostat OFF point Y Thermostat ON point Z 24 C or more Room thermistor tem...

Page 43: ... temperature Ts determines the target temperature Tt Ts 18 30 C 2 The target temperature Tt is calculated as Tt Ts C where C is the correction value C 0 C 3 Thermostat ON OFF point and operation mode switching point are as follows Tr means the room thermistor temperature 1 Heating Cooling switching point Tr Tt 2 5 C 2 Cooling Heating switching point Tr Tt 3 0 C 3 Thermostat ON OFF point is the sam...

Page 44: ...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 temperature difference is in the zone B Cooling Dry 10 minutes Heating 10 seconds Cooling Dry Heating Refer to Temperature Control on page 29 for details Zone B Zone A OFF ON Zone C Room thermistor temperature target temperature 1 5 C R22110...

Page 45: ...then automatically raises the target temperature slightly in cooling or lowers it slightly in heating This prevents excessive cooling in summer and excessive heating in winter to ensure comfortable sleeping conditions and also conserves electricity Cooling Heating R22018 TIMER operation NIGHT SET Mode ON Target temperature 0 5 C temperature shift Operation stops at the set hours 0 5 C 1 hour TIMER...

Page 46: ... LEAVE button is ineffective in dry operation and fan operation 2 Details of Function A mark representing HOME LEAVE is indicated on the display of the remote controller The indoor unit is operated according to the set temperature and airflow rate for HOME LEAVE which were recorded in the memory of the remote controller The LED red of indoor unit representing HOME LEAVE lights up It goes out when ...

Page 47: ...erter POWERFUL Operation Outline In order to exploit the cooling and heating capacity to full extent the air conditioner can be operated by increasing the indoor fan rotating speed and the compressor frequency Detail When the POWERFUL button is pressed the fan speed and target temperature are converted to the following states for 20 minutes A 50 rpm Ex POWERFUL operation in cooling Note POWERFUL O...

Page 48: ... the following steps 1 Press the CLOCK button is displayed and blinks 2 Press the TIMER or button to set the clock to the present time Holding down the TIMER or button increases or decreases the time display rapidly 3 Press the CLOCK button again blinks and clock setting is completed CLOCK button R19657 TIMER button ...

Page 49: ... to start operation Press once again to stop it The ON OFF button is useful when the remote controller is missing or the battery has run out The operation mode refers to the following table Forced cooling operation Forced cooling operation can be started by pressing the ON OFF button for 5 to 9 seconds while the unit is not operating Refer to page 116 for details Note When the ON OFF button is pre...

Page 50: ...ture used in place of the inner temperature of the compressor rises abnormally the operating frequency becomes lower or the operation halts 2 The discharge pipe thermistor is used for detecting disconnection of the discharge pipe thermistor 3 Indoor Heat Exchanger Thermistor 1 The indoor heat exchanger thermistor is used for controlling the target discharge pipe temperature The system sets the tar...

Page 51: ...s cooling operation R19505 Stop Discharging from capacitor Preheating operation Stop indoor unit OFF Cooling includes drying Fan Normal operation mode Power transistor test mode Forced cooling operation for pump down operstion Forced operstion mode Air conditioner control mode Air conditioner control mode Forced operation mode Forced cooling operation for pump down operation Power transistor test ...

Page 52: ...ibited frequency There is a certain prohibited frequency such as a power supply frequency For Heat Pump Model 1 Determine command frequency Command frequency is determined in the following order of priority 1 Limiting defrost control time 2 Forced cooling 3 Indoor frequency command 2 Determine upper limit frequency The minimum value is set as an upper limit frequency among the frequency upper limi...

Page 53: ...its difference from the frequency previously calculated 2 I control If the operating frequency does not change for more than a certain fixed time the frequency is adjusted according to the D value When the D value is low the frequency is lowered When the D value is high the frequency is increased 3 Frequency management when other controls are functioning When frequency is dropping Frequency manage...

Page 54: ... A C Control II Control I ON condition Discharge pipe temperature B C Radiation fin temperature 85 C OFF condition Discharge pipe temperature C C Radiation fin temperature 90 C Control II ON condition Discharge pipe temperature D C Radiation fin temperature 85 C OFF condition Discharge pipe temperature E C Radiation fin temperature 90 C 3 3 2 Four Way Valve Switching Outline The four way valve coi...

Page 55: ...the compressor starts after the fault of four way valve switching The lower limit of frequency keeps A Hz for B seconds with any conditions 1 through 4 above 3 3 4 3 minute Standby Turning on the compressor is prohibited for 3 minutes after turning it off The function is not activated when defrosting 3 3 5 Compressor Protection Function When turning the compressor from OFF to ON the upper limit of...

Page 56: ...S25 35E2V1B RK X S25 35G2V1B RK X S25 35G2V1B9 RXS25 35J2V1B RXS25K3V1B RXS35K2V1B RXS25 35L2V1B RXS25 35L3V1B A ºC 110 110 B ºC 105 103 C ºC 101 98 D ºC 99 93 E ºC 97 88 Zone Control Stop zone When the temperature reaches the stop zone the compressor stops Dropping zone The upper limit of frequency decreases Keep zone The upper limit of frequency is kept Up zone The upper limit of frequency incre...

Page 57: ...tput frequency is lowered by 2 Hz every second until it reaches the keep zone Keep zone The present maximum frequency goes on Reset zone Limit of the frequency is canceled Limitation of current dropping and stop value according to the outdoor temperature The current drops when outdoor temperature becomes higher than a certain level depending on the model RK X S25E2V1B RK X S25G2V1B RK X S25G2V1B9 ...

Page 58: ...itation is judged with the indoor heat exchanger temperature A C B C C C 7 5 3 R22433 Reset zone Indoor heat exchanger thermistor temperature Up zone Keep zone Dropping zone Stop zone 0 C C C B C A C 13 C RXS25 35E2V1B RXS25 35G2V1B RXS25 35G2V1B9 RXS25 35J2V1B RXS25K3V1B RXS35K2V1B RXS25 35L2V1B RXS25 35L3V1B A ºC 65 63 B ºC 56 56 C ºC 53 53 D ºC 51 51 E ºC 46 46 Zone Control Stop zone When the t...

Page 59: ...ell as normal operation 5 Fan speed control during forced cooling operation The outdoor fan is controlled as well as normal operation during forced cooling operation 6 Fan speed control during POWERFUL operation The rotation speed of the outdoor fan is increased during POWERFUL operation 7 Fan speed control during indoor outdoor unit quiet operation The rotation speed of the outdoor fan is reduced...

Page 60: ...s defrosting Conditions for Canceling Defrost The judgment is made with the outdoor heat exchanger temperature B C The same value continues Frequency Compressor Four way valve Fan ON OFF ON OFF ON OFF 0 Hz 0 Hz C Hz D Hz 5 sec PI control 5 sec H sec R22034 E sec F sec G sec K pulse zone Electronic expansion valve opening Normal control J pulse zone L pulse zone Starting control RXS25 35E2V1B RXS25...

Page 61: ... discharge pipe thermistor is disconnected Feedback Control Target discharge pipe temperature control Detail The followings are the examples of electronic expansion valve control which function in each operation mode Available Not available Control Status Starting operation control Control when the frequency changes Target discharge pipe temperature control Discharge pipe thermistor disconnection ...

Page 62: ...efrosting 3 11 4 Starting Operation Control The electronic expansion valve opening is controlled when the operation starts thus preventing superheating or liquid compression 3 11 5 Control when the Frequency Changes When the target discharge pipe temperature control is active if the target frequency changes to a specified value in a certain time period the target discharge pipe temperature control...

Page 63: ...disconnection is ascertained Discharge pipe temperature 6 C outdoor heat exchanger temperature 2 When the operation mode is heating When the following condition is fulfilled the discharge pipe thermistor disconnection is ascertained Discharge pipe temperature 6 C indoor heat exchanger temperature When the thermistor is disconnected When the disconnection is ascertained the compressor continues ope...

Page 64: ...ower consumption is below the specified value and the frequency is higher than the specified frequency it is regarded as refrigerant shortage The power consumption is low comparing with that in the normal operation when refrigerant is insufficient and refrigerant shortage is detected by checking power consumption II Detecting by discharge pipe temperature If the discharge pipe temperature is highe...

Page 65: ...SiBE05 722EE Remote Controller 55 Part 5 Remote Controller 1 Remote Controller 56 ...

Page 66: ...t and the remote controller such as a curtain the unit will not operate The maximum distance for communication is about 4 m HOME LEAVE 1 button Press this button to start HOME LEAVE operation The HOME LEAVE lamp lights up POWERFUL 2 button Starts POWERFUL operation ON OFF button Press this button once to start operation Press once again to stop it AUTO DRY COOL HEAT FAN 18 30 C Not available 18 32...

Page 67: ... last ON TIMER button Press this button and adjust the time with the TIMER setting button Press this button again to complete TIMER setting OFF TIMER button Press this button and adjust the time with the TIMER setting button Press this button again to complete TIMER setting Mode button Selects the operation mode heat pump only AUTO DRY COOL HEAT FAN heat pump only TIMER Setting button Changes the ...

Page 68: ...ck 81 4 13 DC Fan Lock 82 4 14 Input Overcurrent Detection 83 4 15 Four Way Valve Abnormality 84 4 16 Discharge Pipe Temperature Control 86 4 17 High Pressure Control in Cooling 87 4 18 Compressor System Sensor Abnormality 88 4 19 Position Sensor Abnormality 89 4 20 DC Voltage Current Sensor Abnormality 91 4 21 Thermistor or Related Abnormality Outdoor Unit 92 4 22 Electrical Box Temperature Rise ...

Page 69: ...on lamp OFF Check the outdoor temperature Heating operation is not available when the outdoor temperature is 18 CWB or higher and cooling operation is not available when the outdoor temperature is below 10 CDB Diagnose with remote controller indication 64 The unit operates but does not cool or does not heat Check for wiring and piping errors in the connection between the indoor unit and outdoor un...

Page 70: ...ission error occurs between the indoor and outdoor units In either case conduct the diagnostic procedure described in the following pages Service Monitor The indoor unit has a green LED LED A on the control PCB When the microcomputer works in order the LED A blinks Refer to page 19 for the location of LED A 2 2 Outdoor Unit The outdoor unit has a green LED LED A on the PCB When the microcomputer w...

Page 71: ...icate non corresponding codes 2 To return to the normal mode hold the timer cancel button down for 5 seconds When the remote controller is left untouched for 60 seconds it also returns to the normal mode 3 Not all the error codes are displayed When you cannot find the error code try method 2 Refer to page 62 No Code No Code No Code 1 00 12 C7 23 H0 2 U4 13 H8 24 E1 3 F3 14 J3 25 P4 4 E6 15 A3 26 L...

Page 72: ...e long beep 3 Diagnose by the sound beep The left side number does not correspond with the error code two consecutive beeps The left side number corresponds with the error code but the right side number does not long beep Both the left side and right side numbers correspond with the error code The numbers indicated when you hear the long beep are the error code Error codes and description Refer to...

Page 73: ...ng beep Both the left side and right side numbers correspond with the error code 7 Determine the error code The numbers indicated when you hear the long beep are the error code Error codes and description Refer to page 64 8 Press the MODE button to exit from the diagnosis mode The display means the trial operation mode Refer to page 118 for trial operation 9 Press the ON OFF button twice to return...

Page 74: ... abnormality 69 C9 Room temperature thermistor or related abnormality 69 Outdoor Unit E1 Outdoor unit PCB abnormality 77 E5 OL activation compressor overload 79 E6 Compressor lock 81 E7 DC fan lock 82 E8 Input overcurrent detection 83 EA Four way valve abnormality 84 F3 Discharge pipe temperature control 86 F6 High pressure control in cooling 87 H0 Compressor system sensor abnormality 88 H6 Positi...

Page 75: ... OK Check the power supply voltage Start operation Voltage as rated Error repeats Check the power supply voltage Start operation Voltage as rated Error repeats Error repeats Combination of the indoor and outdoor unit matched YES NO NO YES NO NO YES R22984 Caution To secure the connection once disconnect the connector and then reconnect the connector YES NO YES NO YES NO YES Match the compatible mo...

Page 76: ...control During heating operation the indoor heat exchanger temperature is above 65 C Supposed Causes Short circuited air Clogged air filter of the indoor unit Dust accumulation on the indoor heat exchanger Defective indoor heat exchanger thermistor Defective indoor unit PCB Troubleshooting Check No 01 Refer to P 102 NO NO NO Check No 01 Check the indoor heat exchanger thermistor YES YES R21064 YES...

Page 77: ...peration determines abnormal fan motor operation Error Decision Conditions The detected rotation speed does not reach the demanded rotation speed of the target tap Supposed Causes Power supply voltage is not as specified Layer short inside the fan motor winding Breaking of wire inside the fan motor Breaking of the fan motor lead wires Defective capacitor of the fan motor Defective indoor unit PCB ...

Page 78: ...ace the indoor unit PCB control PCB Replace the fan motor Replace the capacitor Replace the indoor unit PCB control PCB Replace the fan motor Replace the indoor unit PCB control PCB Measure the voltage between the black and white lead wires of the fan motor and check if the maximum voltage reaches the rated voltage Check No 04 Check Hall IC Is there an output Check the fan motor voltage Voltage as...

Page 79: ...pposed Causes Disconnection of connector Thermistor corresponding to the error code is defective Defective indoor unit PCB Troubleshooting Check No 01 Refer to P 102 C4 Indoor heat exchanger thermistor C9 Room temperature thermistor YES R21870 NO Check No 01 Check the thermistor resistance value YES NO Caution Correct the connection Replace the defective thermistor Replace the indoor unit PCB cont...

Page 80: ...conds Opening of the electronic expansion valve D Discharge pipe temperature E target discharge pipe temperature F Refrigerant shortage detection III When the difference of the temperature is smaller than G C it is regarded as refrigerant shortage If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Disconnection o...

Page 81: ...lare or replace the union Check the pipes for improper contact and correct them as required Replace the cracked pipe Check the power transistor harness for loosening Correct the connection as required Also replace the cracked pipe Replace the electronic expansion valve Replace the defective thermistor s Completed Refrigerant shortage error again Oil oozing at internal piping Stop valve closed Comp...

Page 82: ...it is below 180 V The compressor stops if the error occurs and restarts automatically after 3 minute standby Over voltage detection An over voltage signal is fed from the over voltage detection circuit to the microcomputer The compressor stops if the error occurs and restarts automatically after 3 minute standby Supposed Causes Power supply voltage is not as specified Defective DC voltage detectio...

Page 83: ...ES YES YES Reconnect the harness Check the power supply voltage Check the connection of the compressor harness Disturbance factors Noise Power supply distortion Precaution before turning on the power again Make sure the power has been off for at least 30 seconds Turn on the power System restarted Repeat a few times Loose or disconnected NO NO Replace the outdoor fan motor and the outdoor unit PCB ...

Page 84: ...normal Error Decision Conditions The data sent from the outdoor unit cannot be received normally or the content of the data is abnormal Supposed Causes Power supply voltage is not as specified Reduction of power supply voltage Wiring error Breaking of the connection wires between the indoor and outdoor units wire No 3 Defective outdoor unit PCB Short circuit inside the fan motor winding Defective ...

Page 85: ...nit connection wires Replace the outdoor unit PCB main PCB Replace the connection wires between the indoor unit and outdoor unit Is LED A blinking Properly insulated Is there any disturbance Is there any wiring error Check the indoor unit outdoor unit connection wires Check the LED A on the outdoor unit PCB Be sure to turn off the power switch before connecting or disconnecting connectors or parts...

Page 86: ...rconnected Wrong wiring of connecting wires Wrong indoor unit PCB or outdoor unit PCB mounted Defective indoor unit PCB Defective outdoor unit PCB Troubleshooting R20435 Caution NO YES YES NO Match the compatible models OK Correct the connection Check the code numbers 2P012345 for example of the indoor and outdoor unit PCB with the Parts List If not matched change for the correct PCB Are the conne...

Page 87: ...RK X S25 35E2V1B RK X S25 35G2V1B RK X S25 35G2V1B9 RXS25 35J2V1B RXS25K3V1B RXS35K2V1B RXS25 35L2V1B Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Continuously ON or OFF Blink Check the voltage of the connection wires on the indoor terminal board between No 1 and No 2 NO YES Replace the connection wires between the indoor unit a...

Page 88: ... OFF Blink Check the voltage of the connection wires on the indoor terminal board between No 1 and No 2 NO YES Replace the connection wires between the indoor unit and outdoor unit Normal YES R22975 NO Replace the outdoor unit PCB main PCB Ground the system Zero cross signal abnormality Replace the outdoor unit PCB main PCB Check if the outdoor unit is grounded Is LED A blinking Grounded Turn on t...

Page 89: ...own Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Disconnection of discharge pipe thermistor Defective discharge pipe thermistor Disconnection of connector S40 Disconnection of 2 terminals of OL Q1L Defective OL Q1L Broken OL harness Defective electronic expansion valve or coil Defective four way valve or coil Defective outdoor unit PCB Refrigerant sho...

Page 90: ... electronic expansion valve or the coil Refer to the refrigerant line check procedure Replace the outdoor unit PCB main PCB Replace the four way valve or the coil Replace the outdoor unit PCB main PCB Discharge pipe thermistor disconnected Check No 01 Check the discharge pipe thermistor Check No 13 Check the four way valve Check No 14 Check the refrigerant line Check No 12 Check the electronic exp...

Page 91: ...to P 104 Check No 15 Refer to P 106 Turn off the power Disconnect the harnesses U V and W R21067 Caution NO YES YES NO NO YES NO YES Check No 15 Check with the inverter analyzer Turn off the power and reconnect the harnesses Turn on the power again and restart the system Precaution before turning on the power again Make sure the power has been off for at least 30 seconds Correct the power supply o...

Page 92: ...uck in the fan Defective fan motor Defective outdoor unit PCB Troubleshooting Check No 16 Refer to P 108 FU2 R21669 Caution YES YES NO YES NO NO YES NO NO Turn on the power Rotate the fan YES Check No 16 Check the rotation pulse input on the outdoor unit PCB main PCB Turn off the power and reconnect the connector Remove the foreign matter Replace the outdoor fan motor Replace the fuse Replace the ...

Page 93: ...9 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged An input overcurrent may result from wrong internal wiring If the system is interrupted by an input overcurrent after the wires have been disconnected and reconnected for part replacement check the wiring again R21863 NO YES YES NO Start operation and measure the input current Check...

Page 94: ...lowing condition continues over 10 minutes after operating for 5 minutes Cooling Dry A B 5 C Heating B A 5 C A Room thermistor temperature B Indoor heat exchanger temperature If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Disconnection of four way valve coil Defective four way valve coil or harness Defective ...

Page 95: ...dust clogged Reconnect the thermistor s Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged R20405 Refrigerant shortage Water mixed Stop valve Four way valve coil disconnected loose Harness disconnected Any thermistor disconnected Check No 01 Check the thermistors Check No 14 Check the refrigerant line Check No 13 Check the four way va...

Page 96: ...rtage Defective four way valve Water mixed in refrigerant Defective stop valve Defective outdoor unit PCB Troubleshooting Check No 01 Refer to P 102 Check No 12 Refer to P 104 Check No 14 Refer to P 105 A C B C 1 above 45 Hz rising above 40 Hz dropping 110 97 2 30 45 Hz rising 25 40 Hz dropping 105 92 3 below 30 Hz rising below 25 Hz dropping 99 86 R20417 Caution NG OK OK OK NG NG Discharge pipe t...

Page 97: ...tdoor unit PCB Troubleshooting Check No 01 Refer to P 102 Check No 12 Refer to P 104 Check No 17 Refer to P 109 Check No 18 Refer to P 109 Check No 19 Refer to P 110 R20418 Caution Replace the outdoor fan motor Reconnect the connector or fan motor lead wires Replace the stop valve Replace the outdoor heat exchanger thermistor Replace the outdoor unit PCB main PCB Replace the electronic expansion v...

Page 98: ...oltage before compressor start up is below 50 V Supposed Causes Broken or disconnected harness Defective outdoor unit PCB Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged NO R22772 YES Turn off the power Then turn on the power to restart the system YES NO Replace the harness Replace the outdoor unit PCB main PCB Is t...

Page 99: ...h the position detection circuit Error Decision Conditions If the error repeats the system is shut down Reset condition Continuous run for about 11 minutes without any other error Supposed Causes Power supply voltage is not as specified Disconnection of the compressor harness Defective compressor Defective outdoor unit PCB Start up failure caused by the closed stop valve Input voltage is outside t...

Page 100: ...5 Check with the inverter analyzer Turn off the power Disconnect the harnesses U V and W Turn on the power Check the electrolytic capacitor voltage Electrical components or compressor harnesses connected as specified Replace the outdoor unit PCB main PCB Correct the power supply or replace the outdoor unit PCB main PCB Replace the compressor Reconnect the electrical components or compressor harnes...

Page 101: ...mpressor running frequency and the input current Error Decision Conditions If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Defective outdoor unit PCB Troubleshooting Replace the outdoor unit PCB main PCB Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be ...

Page 102: ...emperature is lower than the heat exchanger temperature Supposed Causes Disconnection of the connector for the thermistor Thermistor corresponding to the error code is defective Defective heat exchanger thermistor in the case of J3 error outdoor heat exchanger thermistor in cooling operation or indoor heat exchanger thermistor in heating operation Defective outdoor unit PCB Troubleshooting In case...

Page 103: ...r than the heat exchanger temperature Replace the defective thermistor s of the following thermistors Outdoor temperature thermistor Discharge pipe thermistor Outdoor heat exchanger thermistor Radiation fin thermistor Cooling Outdoor heat exchanger temperature Heating Indoor heat exchanger temperature Replace the indoor heat exchanger thermistor Replace the outdoor unit PCB main PCB Error displaye...

Page 104: ...The error is cleared when the radiation fin temperature drops below B C To cool the electrical components the outdoor fan starts when the radiation fin temperature rises above C C and stops when the radiation fin temperature drops below B C Supposed Causes Defective outdoor fan motor Short circuit Defective radiation fin thermistor Disconnection of connector Defective outdoor unit PCB A C B C C C ...

Page 105: ...ES Radiation fin thermistor NO NO YES NO YES Turn off the power Then turn on the power to restart the system Check the radiation fin temperature Above A C Thermistor as specified in its characteristic chart Check No 01 Check the thermistor resistance value Error again or outdoor fan activated Replace the radiation fin thermistor Replace the outdoor unit PCB main PCB YES NG NO OK Radiation fin dirt...

Page 106: ... the power Then turn on the power to restart the system Check the radiation fin temperature Radiation fin dirty Check No 19 Check the outdoor fan Error again or outdoor fan activated Replace the outdoor unit PCB main PCB Clean up the radiation fin Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Replace the outdoor fan motor Correct the con...

Page 107: ...when the radiation fin temperature drops below B C If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Defective outdoor fan motor Short circuit Defective radiation fin thermistor Disconnection of connector Defective outdoor unit PCB Silicone grease is not applied properly on the radiation fin after replacing the ...

Page 108: ... C Thermistor as specified in its characteristic chart Check No 01 Check the thermistor resistance value Error displayed again Has the PCB been replaced Replace the radiation fin thermistor Replace the outdoor unit PCB main PCB Check if the silicone grease applied properly on the radiation fin If not apply the silicone grease NG OK Check No 19 Check the outdoor fan Replace the outdoor fan motor Co...

Page 109: ...nectors or parts may be damaged R22540 NO NG OK NO YES Check the radiation fin temperature NO YES YES Above A C Check No 19 Check the outdoor fan Error displayed again Has the PCB been replaced Check if silicone grease is applied properly on the radiation fin If not apply the silicone grease Replace the outdoor unit PCB main PCB Replace the outdoor fan motor Correct the connectors and fan motor le...

Page 110: ...A rotation speed error occurs while the compressor is running An output overcurrent signal is fed from the output overcurrent detection circuit to the microcomputer If the error repeats the system is shut down Reset condition Continuous run for about 11 minutes without any other error Supposed Causes Poor installation condition Closed stop valve Defective power module Wrong internal wiring Abnorma...

Page 111: ...ck the power supply voltage Monitor the power supply voltage discharge and suction pressures and other factors for a long term Possible causes Momentary drop of power supply voltage Compressor overload Short circuit Check the installation condition Check with the inverter analyzer Check the power module Not a malfunction Keep observing Check the connectors and other components Fully open the stop ...

Page 112: ...n a PCB remove the PCB from the control PCB to measure the resistance When the connector of indoor heat exchanger thermistor is soldered on a PCB remove the thermistor and measure the resistance Thermistor temperature C Resistance kΩ 20 197 8 15 148 2 10 112 1 5 85 60 0 65 93 5 51 14 10 39 99 15 31 52 20 25 02 25 20 00 30 16 10 35 13 04 40 10 62 45 8 707 50 7 176 R25 C 20 kΩ B 3950 K kΩ 150 100 50...

Page 113: ...ve PCB Æ Replace the PCB control PCB If NG in step 2 Æ Defective Hall IC Æ Replace the fan motor If OK in both steps 1 and 2 Æ Replace the PCB control PCB 5 3 Power Supply Waveforms Check Check No 11 Measure the power supply waveform between No 1 and No 2 on the terminal board and check the waveform disturbance Check if the power supply waveform is a sine wave Fig 1 Check if there is waveform dist...

Page 114: ...n the above step 2 disconnect the connector and check the continuity using a multimeter 4 Check the continuity between the pins 1 6 3 6 2 5 4 5 between the pins 1 6 2 6 3 6 4 6 for the harness 5P models If there is no continuity between the pins the EV coil is faulty 5 If the continuity is confirmed in step 3 the outdoor unit PCB is faulty Harness 6P 6P Connector Check S20 1 6 3 6 2 5 4 5 1 2 3 4 ...

Page 115: ...coil Cooling Dry Not energized Heating Energized Replace the outdoor unit PCB main PCB Replace the four way valve coil Replace the four way valve Four way valve coil resistance at 1000 2000 Ω S80 voltage at 220 240 VAC with compressor on Fig 1 R11904 Fig 1 Voltage at S80 220 240 VAC Time Compressor ON Refrigerant system check Check for refrigerant leakage See the service diagnosis on refrigerant s...

Page 116: ...c capacitor drops to 10 VDC or below before carrying out the service work Reference If the terminals of the compressor are not FASTON terminals difficult to remove the wire on the terminals it is possible to connect wires available on site to the outdoor unit from output side of PCB Do not connect them to the compressor at the same time otherwise it may result in incorrect detection Step 3 RK X S2...

Page 117: ...pressor is defective Replace the compressor 2 If the LEDs are not lit uniformly check the power module Refer to Check No 22 3 If NG in Check No 22 replace the power module Replace the main PCB The power module is united with the main PCB If OK in Check No 22 check if there is any solder cracking on the PCB 4 If any solder cracking is found replace the PCB or repair the soldered section If there is...

Page 118: ...hand When the fuse is melted check the outdoor fan motor for proper function If NG in step 2 Defective PCB Replace the outdoor unit PCB main PCB If NG in step 4 Defective Hall IC Replace the outdoor fan motor If OK in both steps 2 and 4 Replace the outdoor unit PCB main PCB RK X S25 35G2V1B9 RXS25 35J2V1B RXS25K3V1B RXS35K2V1B RXS25 35L2V1B 1 Check that the voltage between the pins 10 11 is 15 VDC...

Page 119: ...y dirty Change the installation location or direction Change the installation location or direction Clean the outdoor heat exchanger Check the outdoor temperature The outdoor temperature should be within the operation range Change the installation location or direction R19385 YES YES YES NO NO NO NO YES Is the air filter or indoor outdoor heat exchanger dirty Is the connection pipe deformed Is the...

Page 120: ...the table below If the resistance is or less than 1 kΩ short circuit occurs on the main circuit RK X S25 35E2V1B R21195 YES NO NO YES Outdoor fan system is functioning Check the outdoor fan system Reconnect the connector Is the outdoor fan running Fan motor lead wire connector disconnected Go to Check No 16 Positive terminal of digital multimeter 2 3 4 2 3 1 Negative terminal of digital multimeter...

Page 121: ...SiBE05 722EE Check Service Diagnosis 111 RK X S25 35G2V1B RK X S25 35G2V1B9 RXS25 35J2V1B RXS25K3V1B RXS35K2V1B RXS25 35L2V1B R19665 4 3 2 1 Multimeter R19666 Multimeter 1 2 3 4 ...

Page 122: ... press the protrusion on the connector Follow the procedure below to measure resistance between the terminals of the power module and the terminals of the compressor with a multimeter Evaluate the measurement results referring to the following table R20698 1 2 3 4 Multimeter Positive terminal of digital multimeter Power module UVW Power module UVW Negative terminal of digital multimeter UVW Power ...

Page 123: ...SiBE05 722EE Check Service Diagnosis 113 RK X S25 35E2V1B RK X S25 35G2V1B R22979 Pin 35 Pin 34 W Pin 33 V Pin 32 U Pin 31 R23023 Pin 20 Pin 21 U Pin 22 V Pin 23 W Pin 24 Power module ...

Page 124: ...iBE05 722EE 114 Service Diagnosis RK X S25 35G2V1B9 RXS25 35J2V1B RXS25K3V1B RXS35K2V1B RXS25 35L2V1B RXS25 35L3V1B R20794 V U W DC Power module DC Power module Pin 24 Pin 23 U Pin 22 V Pin 21 W Pin 20 R20703 ...

Page 125: ...ing 116 1 1 Pump Down Operation 116 1 2 Forced Cooling Operation 116 2 Trial Operation 118 3 Field Settings 119 3 1 When 2 Units are Installed in 1 Room 119 3 2 Facility Setting Jumper cooling at low outdoor temperature 120 3 3 Jumper and Switch Settings 121 4 Silicone Grease on Power Transistor Diode Bridge 122 ...

Page 126: ...e outdoor unit is not operating Start The forced cooling operation starts when any of the following conditions is fulfilled 1 Press the forced cooling operation ON OFF button SW1 on the indoor unit for 5 seconds 2 Press the forced cooling operation ON OFF button SW1 on the outdoor unit RK X S25 35E2V1B RK X S25 35G2V1B RK X S25 35G2V1B9 RXS25 35J2V1B RXS25K3V1B RXS35K2V1B RXS25 35L2V1B only Comman...

Page 127: ...K X S25 35G2V1B9 RXS25 35J2V1B RXS25K3V1B RXS35K2V1B RXS25 35L2V1B Caution When pressing the button do not touch the terminal board It has a high voltage and may cause electric shock ON OFF button SW1 R19667 Screwdriver R22980 1 2 3 Forced cooling operation ON OFF button 1 2 3 Push here Screwdriver R22528 Forced cooling operation ON OFF button ...

Page 128: ...temperature 30 C Trial operation may be disabled in either operation mode depending on the room temperature After trial operation is complete set the temperature to a normal level 26 C 28 C in cooling 20 C 24 C in heating operation For protection the system does not start for 3 minutes after it is turned off ARC433 Series 1 Press the ON OFF button to turn on the system 2 Press the center of the TE...

Page 129: ...set for different addresses Both the indoor unit PCB and the wireless remote controller need alteration Indoor Unit PCB Cut the address setting jumper JA on the control PCB Caution Replace the PCB if you accidentally cut a wrong jumper Jumpers are necessary for electronic circuit Improper operation may occur if you cut any of them Wireless Remote Controller Cut the address setting jumper ADDRESS J...

Page 130: ...ut a wrong jumper Jumpers are necessary for electronic circuit Improper operation may occur if you cut any of them Caution 1 If the outdoor unit is installed where the outdoor heat exchanger of the unit is exposed to direct wind provide a windbreak wall 2 Intermittent noises may be produced by the indoor unit due to the outdoor fan turning on and off when using facility settings 3 Do not place hum...

Page 131: ...ive only in cooling operation JB Fan speed setting Remote controller setting The fan stops Power failure recovery function JC Auto restart The unit does not resume operation after recovering from a power failure Timer settings are cleared Function Switch FLOOR factory setting CEILING Installation style changeover SW2 When installed as the floor mounted type When installed as the ceiling suspended ...

Page 132: ... bridge Detail 1 Wipe off the old silicone grease completely 2 Apply the silicone grease evenly See the illustrations below for examples of application 3 Tighten the screws of the power transistor diode bridge 4 Make sure that the heat radiation parts are firmly contacted to the radiation fin Note Smoke emission may be caused by bad heat radiation when the silicone grease is not appropriately appl...

Page 133: ...SiBE05 722EE Appendix 123 Part 8 Appendix 1 Piping Diagrams 124 1 1 Indoor Unit 124 1 2 Outdoor Unit 125 2 Wiring Diagrams 128 2 1 Indoor Unit 128 2 2 Outdoor Unit 129 ...

Page 134: ...RANT FLOW COOLING INDOOR UNIT 6 4CuT SIROCCO FAN 9 5CuT FAN MOTOR M HEAT EXCHANGER THERMISTOR ON HEAT EXCH FIELD PIPING 6 4CuT FIELD PIPING 9 5CuT 4D034012E FIELD PIPING 6 4CuT FIELD PIPING 9 5CuT INDOOR UNIT 6 4CuT SIROCCO FAN 9 5CuT FAN MOTOR M HEAT EXCHANGER REFRIGERANT FLOW COOLING HEATING 4D048722C THERMISTOR ON HEAT EXCH ...

Page 135: ...ILTER MOTOR OPERATED VALVE MUFFLER WITH FILTER LIQUID STOP VALVE GAS STOP VALVE FOUR WAY VALVE NORMALLY OFF DISCHARGE PIPE THERMISTOR 3D047318G OUTDOOR UNIT HEAT EXCHANGER 7 0 CuT 7 0 CuT 9 5 CuT EV 4 8 CuT 6 4 CuT 6 4 CuT 4 8 CuT M PROPELLER FAN 9 5 CuT 9 5 CuT 6 4 CuT 7 9 CuT 9 5 CuT MUFFLER 9 5 CuT 9 5 CuT COMPRESSOR MUFFLER MUFFLER 7 9 CuT ACCUMULATOR COOLING OUTDOOR TEMPERATURE THERMISTOR HEA...

Page 136: ...R WITH FILTER MUFFLER WITH FILTER LIQUID STOP VALVE FIELD PIPING 6 4CuT FIELD PIPING 9 5CuT GAS STOP VALVE DISCHARGE PIPE THERMISTOR FOURWAY VALVE ON HEATING 3D047316S OUTDOOR UNIT HEAT EXCHANGER 7 0CuT 7 0CuT 9 5CuT EV 4 8CuT 6 4CuT 6 4CuT 4 8CuT M PROPELLER FAN 9 5CuT 9 5CuT 6 4CuT FIELD PIPING 6 4CuT 7 9CuT 9 5CuT MUFFLER FIELD PIPING 9 5CuT 9 5CuT COMPRESSOR 9 5CuT MUFFLER MUFFLER 7 9CuT ACCUM...

Page 137: ...arge pipe thermistor Outdoor air temperature thermistor Liquid stop valve Gas stop valve Muffler Field piping Field piping 6 4CuT 9 5CuT 3D091995A Outdoor unit Outdoor air temperature thermistor Heat exchanger thermistor Muffler with filter Muffler with filter Muffler with filter Muffler Muffler Discharge pipe thermistor Muffler Liquid stop valve Accumulator Accumulator Compressor Gas stop valve M...

Page 138: ...OUTDOOR GRN YLW FIELD WIRING C70 PCB4 H3 S1W HA H4 H5 H6 S7 S21 S27 S26 INDOOR S31 S32 S6 t t X11A X21A R2T R1T M M 1 M1F t M1S 100 C SIGNAL RECEIVER WIRELESS REMOTE CONTROLLER TRANSMISSION CIRCUIT Fu 3 15A CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN PROTECTIVE EARTH RUNNING CAPACITOR FUSE PILOT LAMP FAN MOTOR SWING MOTOR C70...

Page 139: ...G RED BRN BLU GRY BLK BLU WHT RED RED BLU BRN YLW ORG WHT YLW 3 1 t t t S80 Y1R Z1C M V 1 M N 2 Y1E Q1L R1T M1F R2T R3T W U OUTDOOR DISCHARGE CONDENSER M1C C74 C75 C94 C95 C100 DB1 DB2 FU1 FU2 FU3 IC11 IPM1 L L1 L1R M1C M1F MRCW MRM10 MRM20 CAPACITOR DIODE BRIDGE FUSE TRIAC INTELLIGENT POWER MODULE LIVE COIL REACTOR COMPRESSOR MOTOR FAN MOTOR MAGNETIC RELAY N PCB1 PCB2 Q1L R1T R2T R3T R12T S10 S11...

Page 140: ...BLK BLK BLK BLU RED BRN RED BRN WHT YLW WHT ORG BLK BLK ORG Y1R BLK GRY 1 3 t t t Z1C M S80 M V 1 N 4 M1F R1T R2T R3T Y1E Q1L W U OUTDOOR DISCHARGE M1C CONDENSER IN CASE OF COOLING ONLY TYPE IN CASE OF HEAT PUMP TYPE V1 V2 V3 VARISTOR X1M TERMINAL STRIP Y1E ELECTRONIC EXPANSION VALVE COIL Y1R REVERSING SOLENOID VALVE COIL Z1C Z2C Z3C FERRITE CORE PROTECTIVE EARTH PCB1 PCB2 PRINTED CIRCUIT BOARD PT...

Page 141: ... BLU BLU BLK BLK BLK BLK BLK BLK ORG BRN RED BLU BLK ORG WHT YLW WHT YLW 4 1 2 1 t t t 3 1 Y1R S80 X12A M S110 V Q1L U R1T R2T R3T W SW1 BLK BLK Y1E OUTDOOR DISCHARGE M1F M1C PCB3 CONDENSER 1 REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS C5 C6 C119 DB1 DB2 DB3 FU1 FU2 FU3 IPM1 IPM2 L L1 L1R M1C M1F MRCW MR30 MRM10 MRM20 N Q1L CAPACITOR DIODE BRIDGE FUSE INTELLIGENT POWER MODULE LIVE COIL REACT...

Page 142: ... MRCW C400 1 3 HL1 HN1 MR30 2 Outdoor Outdoor Condenser Discharge Indoor 3 V V FU1 FU2 FU3 L1 L1R HL1 HN1 E1 E2 HR1 HR2 X12A S MR30_A MR30_B R1T R2T R3T S20 S30 S40 S50 S71 S80 S90 V2 V3 V150 C400 C405 L Z1C Z2C Z3C M1F MRCW MR30 MRM10 N Fuse Coil Reactor Connection Thermistor Connector Varistor Capacitor Live Ferrite core Power supply Fan motor Magnetic relay Neutral DB1 Diode bridge X1M Terminal...

Page 143: ...el addition RK X S25 35G2V1B RK X S25 35G2V1B9 01 2011 SiBE05 722_B Model addition RXS25 35J2V1B 12 2012 SiBE05 722_C Model addition RXS25K3V1B RXS35K2V1B 01 2014 SiBE05 722ED Model addition FLXS35BAVMB9 RXS35L2V1B 01 2016 SiBE05 722EE Model addition RXS25L2V1B RXS25 35L3V1B Part 6 7 page 58 122 Reference only ...

Page 144: ...ies supplied or specified by Daikin Ask a qualified installer or contractor to install those parts and accessories Use of unauthorised parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage electrical shock fire or explosion z Read the user s manual carefully before using this product The user s manual provides important safety instructio...

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