Daikin G-Series Service Manual Download Page 105

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SiBE04-808_B

Service Diagnosis

Part 6

Service Diagnosis

1. Caution for Diagnosis............................................................................95

1.1

Troubleshooting with LED ......................................................................95

2. Problem Symptoms and Measures .......................................................96
3. Service Check Function ........................................................................97

3.1

ARC452 Series.......................................................................................97

3.2

ARC433 Series.....................................................................................100

4. Troubleshooting ..................................................................................103

4.1

Error Codes and Description ................................................................103

4.2

Indoor Unit PCB Abnormality ...............................................................104

4.3

Freeze-up Protection Control or Heating Peak-cut Control..................105

4.4

Fan Motor (DC Motor) or Related Abnormality.....................................107

4.5

Thermistor or Related Abnormality (Indoor Unit)..................................109

4.6

Signal Transmission Error (between Indoor Unit and Outdoor Unit) ....110

4.7

Unspecified Voltage (between Indoor Unit and Outdoor Unit) .............111

4.8

Outdoor Unit PCB Abnormality.............................................................112

4.9

OL Activation (Compressor Overload) .................................................114

5. Check ..................................................................................................146

5.1

How to Check .......................................................................................146

Summary of Contents for G-Series

Page 1: ...Service Manual Inverter Pair Wall Mounted Type G Series SiBE04 808_B Applied Models z Inverter Pair Cooling Only z Inverter Pair Heat Pump ...

Page 2: ...2V1B RKS25G2V1B9 RKS35G2V1B RKS35G2V1B9 RKS42G2V1B RKS50G2V1B zHeat Pump Indoor Units FTXS20G2V1B ATXS20G2V1B FTXS25G2V1B ATXS25G2V1B FTXS35G2V1B ATXS35G2V1B FTXS42G2V1B ATXS42G2V1B FTXS50G2V1B ATXS50G2V1B Outdoor Units RXS20G2V1B RXS20G2V1B9 ARXS20G2V1B ARXS20G3V1B RXS25G2V1B RXS25G2V1B9 ARXS25G2V1B ARXS25G3V1B RXS35G2V1B RXS35G2V1B9 ARXS35G2V1B ARXS35G3V1B RXS42G2V1B ARXS42G2V1B RXS50G2V1B ARXS5...

Page 3: ...s 33 1 4 Program Dry Operation 34 1 5 Automatic Operation 35 1 6 Thermostat Control 36 1 7 NIGHT SET Mode 37 1 8 ECONO Operation 38 1 9 2 Area INTELLIGENT EYE Operation 39 1 10 INTELLIGENT EYE Operation 41 1 11 Inverter POWERFUL Operation 42 1 12 Other Functions 43 2 Function of Thermistor 44 3 Control Specification 45 3 1 Mode Hierarchy 45 3 2 Frequency Control 46 3 3 Controls at Mode Changing St...

Page 4: ...g with LED 95 2 Problem Symptoms and Measures 96 3 Service Check Function 97 3 1 ARC452 Series 97 3 2 ARC433 Series 100 4 Troubleshooting 103 4 1 Error Codes and Description 103 4 2 Indoor Unit PCB Abnormality 104 4 3 Freeze up Protection Control or Heating Peak cut Control 105 4 4 Fan Motor DC Motor or Related Abnormality 107 4 5 Thermistor or Related Abnormality Indoor Unit 109 4 6 Signal Transm...

Page 5: ... Panels Fan Motor 185 2 2 Removal of Electrical Box 194 2 3 Removal of Thermistors 198 2 4 Removal of PCB 200 2 5 Removal of Reactor Partition Plate 203 2 6 Removal of Sound Blanket 205 2 7 Removal of Four Way Valve 206 2 8 Removal of Compressor 209 3 Outdoor Unit RK X S20 35G2V1B9 ARXS20 35G3V1B 211 3 1 Removal of Outer Panels Fan Motor 211 3 2 Removal of Electrical Box 220 3 3 Removal of PCB 223...

Page 6: ...peration Mode 289 3 Trial Operation 291 4 Field Settings 293 4 1 Model Type Setting 293 4 2 When 2 Units are Installed in 1 Room 293 4 3 Standby Electricity Saving 294 4 4 Facility Setting Jumper and Switch cooling at low outdoor temperature 295 4 5 Jumper and Switch Settings 296 5 Application of Silicon Grease to a Power Transistor and a Diode Bridge 297 Part 9 Appendix 298 1 Piping Diagrams 299 ...

Page 7: ...ower cable plug from the plug socket before disassembling the equipment for repair Working on the equipment that is connected to the power supply may cause an electrical shook If it is necessary to supply power to the equipment to conduct the repair or inspecting the circuits do not touch any electrically charged sections of the equipment If the refrigerant gas is discharged during the repair work...

Page 8: ...electrical shock Do not clean the air conditioner by splashing water Washing the unit with water may cause an electrical shock Be sure to provide the grounding when repairing the equipment in a humid or wet place to avoid electrical shocks Be sure to turn off the power switch and unplug the power cable when cleaning the equipment The internal fan rotates at a high speed and cause injury Be sure to...

Page 9: ... heat generation or fire When wiring between the indoor and outdoor units make sure that the terminal cover does not lift off or dismount because of the cable If the cover is not mounted properly the terminal connection section may cause an electrical shock excessive heat generation or fire Do not damage or modify the power cable Damaged or modified power cable may cause an electrical shock or fir...

Page 10: ...event children from swallowing it If a child swallows the coin battery see a doctor immediately Warning Caution Installation of a leakage breaker is necessary in some cases depending on the conditions of the installation site to prevent electrical shocks Do not install the equipment in a place where there is a possibility of combustible gas leaks If the combustible gas leaks and remains around the...

Page 11: ...re to install the packing and seal on the installation frame properly If the packing and seal are not installed properly water may enter the room and wet the furniture and floor For unitary type only Caution Icon Type of Information Description Note Note A note provides information that is not indispensable but may nevertheless be valuable to the reader such as tips and tricks Caution Caution A ca...

Page 12: ...SiBE04 808_B 1 List of Functions Part 1 List of Functions 1 Functions 2 1 1 Cooling Only 2 1 2 Heat Pump 3 ...

Page 13: ...er Power Failure 3 D Airflow Self Diagnosis Digital LED Display COMFORT AIRFLOW Operation Wiring Error Check Comfort Control Auto Fan Speed Anti Corrosion Treatment of Outdoor Heat Exchanger Indoor Unit Quiet Operation Flexibility Multi Split Split Type Compatible Indoor Unit NIGHT QUIET Mode Automatic H P C O Compatible Indoor Unit OUTDOOR UNIT QUIET Operation Manual Flexible Voltage Corresponden...

Page 14: ... Auto Restart after Power Failure Horizontal Auto Swing Right and Left Self Diagnosis Digital LED Display 3 D Airflow Wiring Error Check COMFORT AIRFLOW Operation Anti Corrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Flexibility Multi Split Split Type Compatible Indoor Unit Indoor Unit Quiet Operation H P C O Compatible Indoor Unit NIGHT QUIET Mode Automatic Flexible Vo...

Page 15: ... Restart after Power Failure Horizontal Auto Swing Right and Left Self Diagnosis Digital LED Display 3 D Airflow Wiring Error Check COMFORT AIRFLOW Operation Anti Corrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Flexibility Multi Split Split Type Compatible Indoor Unit Indoor Unit Quiet Operation H P C O Compatible Indoor Unit NIGHT QUIET Mode Automatic Flexible Voltage...

Page 16: ...SiBE04 808_B 5 Specifications Part 2 Specifications 1 Specifications 6 1 1 Cooling Only 6 1 2 Heat Pump 9 ...

Page 17: ...le Washable Mildew Proof Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 09 0 08 0 08 0 09 0 08 0 08 0 12 0 12 0 11 Power Consumption Rated W 18 18 18 18 18 18 26 26 26 Power Factor 90 9 97 8 93 8 90 9 97 8 93 8 98 5 94 2 98 5 Temperature Control Microcomputer Control Microcomputer Control Microcomputer Control Dimensions H W D mm 295 800 215 295 800 215 2...

Page 18: ...w Proof Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 09 0 08 0 08 0 09 0 08 0 08 0 12 0 12 0 11 Power Consumption Rated W 18 18 18 18 18 18 26 26 26 Power Factor 90 9 97 8 93 8 90 9 97 8 93 8 98 5 94 2 98 5 Temperature Control Microcomputer Control Microcomputer Control Microcomputer Control Dimensions H W D mm 295 800 215 295 800 215 295 800 215 Packag...

Page 19: ...Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 11 0 11 0 10 0 12 0 12 0 11 Power Consumption Rated W 24 24 24 26 26 26 Power Factor 99 2 94 9 100 0 98 5 94 2 98 5 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 295 800 215 295 800 215 Packaged Dimensions H W D mm 274 870 366 274 870 366 Weight kg 10 10 Gross Weight kg 1...

Page 20: ...ward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 09 0 08 0 08 0 10 0 10 0 09 0 09 0 08 0 08 0 10 0 10 0 09 Power Consumption Rated W 18 18 18 21 21 21 18 18 18 21 21 21 Power Factor 90 9 97 8 93 8 95 5 91 3 97 2 90 9 97 8 93 8 95 5 91 3 97 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 295 800 215 295 8...

Page 21: ...ir Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 12 0 12 0 11 0 13 0 13 0 12 0 09 0 08 0 08 0 10 0 10 0 09 Power Consumption Rated W 26 26 26 28 28 28 18 18 18 21 21 21 Power Factor 98 5 94 2 98 5 97 9 93 6 97 2 90 9 97 8 93 8 95 5 91 3 97 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 295 800 215 295 800 215...

Page 22: ...rd Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 09 0 08 0 08 0 10 0 10 0 09 0 12 0 12 0 11 0 13 0 13 0 12 Power Consumption Rated W 18 18 18 21 21 21 26 26 26 28 28 28 Power Factor 90 9 97 8 93 8 95 5 91 3 97 2 98 5 94 2 98 5 97 9 93 6 97 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 295 800 215 295 800...

Page 23: ...ter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 11 0 11 0 10 0 14 0 14 0 13 0 12 0 12 0 11 0 15 0 14 0 14 Power Consumption Rated W 24 24 24 30 30 30 26 26 26 32 32 32 Power Factor 99 2 94 9 100 0 97 4 93 2 96 2 98 5 94 2 98 5 97 0 99 4 95 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 295 800 215 295 800 215 Pack...

Page 24: ...r Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 09 0 08 0 08 0 10 0 10 0 09 0 09 0 08 0 08 0 10 0 10 0 09 Power Consumption Rated W 18 18 18 21 21 21 18 18 18 21 21 21 Power Factor 90 9 97 8 93 8 95 5 91 3 97 2 90 9 97 8 93 8 95 5 91 3 97 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 295 800 215 295 800 215 ...

Page 25: ...ir Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 12 0 12 0 11 0 13 0 13 0 12 0 09 0 08 0 08 0 10 0 10 0 09 Power Consumption Rated W 26 26 26 28 28 28 18 18 18 21 21 21 Power Factor 98 5 94 2 98 5 97 9 93 6 97 2 90 9 97 8 93 8 95 5 91 3 97 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 295 800 215 295 800 215...

Page 26: ...rd Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 09 0 08 0 08 0 10 0 10 0 09 0 12 0 12 0 11 0 13 0 13 0 12 Power Consumption Rated W 18 18 18 21 21 21 26 26 26 28 28 28 Power Factor 90 9 97 8 93 8 95 5 91 3 97 2 98 5 94 2 98 5 97 9 93 6 97 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 295 800 215 295 800...

Page 27: ...ter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 11 0 11 0 10 0 14 0 14 0 13 0 12 0 12 0 11 0 15 0 14 0 14 Power Consumption Rated W 24 24 24 30 30 30 26 26 26 32 32 32 Power Factor 99 2 94 9 100 0 97 4 93 2 96 2 98 5 94 2 98 5 97 0 99 4 95 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 295 800 215 295 800 215 Pack...

Page 28: ...E04 808_B 17 Printed Circuit Board Connector Wiring Diagram Part 3 Printed Circuit Board Connector Wiring Diagram 1 Printed Circuit Board Connector Wiring Diagram 18 1 1 Indoor Unit 18 1 2 Outdoor Unit 21 ...

Page 29: ...r swing motors 6 S46 Connector for display PCB 7 S47 Connector for signal receiver PCB 8 H1 H2 H3 FG Connector for terminal board 9 JA Address setting jumper Refer to page 293 for detail JB Fan speed setting when compressor stops for thermostat OFF JC Power failure recovery function auto restart Refer to page 296 for detail 10 LED A LED for service monitor green 11 FU1 F1U Fuse 3 15 A 250 V 12 V1 ...

Page 30: ...ted Circuit Board Connector Wiring Diagram SiBE04 808_B 19 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB 1 Control PCB V1 FU1 S1 S41 S21 S47 JB JA JC S46 S25 LED A S32 FG H1 H2 H3 2P206687 1 ...

Page 31: ...t Board Connector Wiring Diagram Printed Circuit Board Connector Wiring Diagram 20 PCB 4 INTELLIGENT EYE Sensor PCB PCB 2 Signal Receiver PCB PCB 3 Display PCB 3P210728 1 S48 3P210728 1 RTH1 SW1 S49 LED3 LED2 LED1 3EB86013 1 S26 ...

Page 32: ...nnector for filter PCB 2 S20 Connector for electronic expansion valve coil 3 S30 Connector for compressor 4 S40 Connector for overload protector 5 S50 Connector 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 reac...

Page 33: ...g Diagram Printed Circuit Board Connector Wiring Diagram 22 PCB Detail PCB 1 Filter PCB PCB 2 Main PCB E1 E2 V2 FU3 HL1HN1 S S50 on main PCB HL2 S11 HN2 HR1 3P203203 1 V3 S10 S20 2P203198 1 J5 J8 S90 S50 S40 S70 LED A SW1 FU2 V1 S80 HL3 HR2 HN3 S30 FU1 ...

Page 34: ...or for electronic expansion valve coil 3 S40 Connector for overload protector 4 S50 Connector 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 Conne...

Page 35: ...rd Connector Wiring Diagram 24 PCB Detail PCB 1 Filter PCB PCB 2 Main PCB PCB 3 Forced Operation Button PCB HR1 HL2 S50 on main PCB 3P254234 1 FU1 HN2 S FU3 AC2 E1 E2 AC1 S11 V3 V2 S10 J5 J4 S90 FU2 S100 S50 2P254206 1 S70 S40 S20 S80 HL3 HN3 V1 LED A U VW HR2 SW1 S110 3P255755 1 ...

Page 36: ...0 Connector for four way valve coil 5 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 6 U V W Connector for compressor 7 HL1 HN1 S Connector for terminal board 8 E E2 Connector for earth 9 HR1 HR2 Connector for reactor 10 LED A LED for service monitor green 11 FU1 FU2 Fuse 3 15 A 250 V 12 FU3 Fuse 30 A 250 V 13 J4 Jumper for facility setting Refer to page 29...

Page 37: ...inted Circuit Board Connector Wiring Diagram Printed Circuit Board Connector Wiring Diagram 26 PCB Detail PCB 1 Control PCB HN1 HL1 E E2 S V1 FU1 LED A S80 S20 S90 S70 HR2 HR1 FU2 S40 J5 J4 U V W 2P208173 1 V3 V4 FU3 ...

Page 38: ... for fan motor 6 S80 Connector for four way valve coil 7 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 8 AC1 AC2 Connector for terminal board power supply 9 E1 E2 Connector for earth 10 HR1 HR2 Connector for reactor 11 U V W Connector for compressor 12 FU1 Fuse 30 A 250 V 13 FU2 FU3 Fuse 3 15 A 250 V 14 V2 V3 V5 V6 V11 Varistor 1 S52 S102 Connector for mai...

Page 39: ... Diagram Printed Circuit Board Connector Wiring Diagram 28 PCB Detail PCB 1 Main PCB PCB 2 Service Monitor PCB V3 V11 AC1 FU2 E1 E2 HR1 HR2 FU3 W 2P169046 5 S40 S20 V U S70 S90 S51 S10 AC2 S101 V5 S80 V6 V2 FU1 S102 SW1 3P169059 1 LED A SW4 B SW4 C S52 ...

Page 40: ...ELLIGENT EYE Operation 41 1 11 Inverter POWERFUL Operation 42 1 12 Other Functions 43 2 Function of Thermistor 44 3 Control Specification 45 3 1 Mode Hierarchy 45 3 2 Frequency Control 46 3 3 Controls at Mode Changing Start up 48 3 4 Discharge Pipe Temperature Control 50 3 5 Input Current Control 51 3 6 Freeze up Protection Control 53 3 7 Heating Peak cut Control 53 3 8 Outdoor Fan Control 54 3 9 ...

Page 41: ...apted by additional parameters in the following cases Frequency restrictions Initial settings Forced cooling operation 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 Target temperature Set temperature Room temperature Room thermistor temperatu...

Page 42: ...e 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 Forced cooling operation mode on page 289 for detail Refrigerant circulation rate high high f low f freq variable Refrigerant circulation rate low high speed low speed R28...

Page 43: ...he auto swing process for cooling dry heating and fan 3 D Airflow Alternative repetition of vertical and horizontal swing motions enables uniform air conditioning of the entire room This function is effective for starting the air conditioner When the horizontal swing and vertical swing are both set to auto mode the airflow becomes 3 D airflow and the horizontal swing and vertical swing motions are...

Page 44: ...automatic fan speed operation upper limit is at M tap in 30 minutes from the operation start Heating On heating mode the fan speed is regulated according to the indoor heat exchanger temperature and the difference between the room thermistor temperature and the target temperature Note 1 During POWERFUL operation fan rotates at H tap 50 rpm 2 Fan stops during defrost operation 3 In time of thermost...

Page 45: ...emperature at start up and the target temperature 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 Room thermistor temperature at start up Target temperature X Thermostat OFF point Y Thermostat ON point Z 24ºC or more Room thermistor temperature at start up X 2 5ºC X 0 5ºC or ...

Page 46: ...ection value 1 The set 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 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 2 5 C 3 Thermostat ON OFF poin...

Page 47: ...rns to the zone C after being in the zone A The system resumes from defrost control in any zones except A The operation turns on in any zones except A The monitoring time has passed while the temperature difference is in the zone B Cooling Dry 10 minutes Heating 10 seconds Cooling Dry Heating B A OFF ON C Room thermistor temperature target temperature 1 5 C R12319 Cooling 0 5 C Dry 0 5 C Cooling 2...

Page 48: ... then automatically raises the target temperature slightly in the case of cooling or lowers it slightly in the case of heating This prevents excessive cooling in summer and excessive heating in winter to ensure comfortable sleeping conditions and also conserves electricity Cooling Heating R10870 TIMER operation NIGHT SET Mode ON Target temperature 0 5 C temperature shift Operation stops at the set...

Page 49: ...O button When this function is activated the maximum capacity also decreases The remote controller can send the ECONO command when the unit is in COOL HEAT DRY or AUTO operation This function can only be set when the unit is running Pressing the ON OFF button on the remote controller cancels the function This function and POWERFUL operation cannot be used at the same time The latest command has th...

Page 50: ...mputer in the indoor unit carries out a sampling every 20 msec and if it detects 10 cycles of the wave in one second in total corresponding to 20 msec 10 200 msec and when the ON signal continues 3 sec it judges human is in the room as the motion signal is ON 2 area INTELLIGENT EYE sensor is divided into 2 areas and detects humans in each area Image of 2 area INTELLIGENT EYE 1 sec sampling 20 msec...

Page 51: ... the airflow direction to area B left side 2 Detection signal ON in area A Shift the airflow direction to area B left side 3 Detection signal ON in area B Shift the airflow direction to area A right side 4 Detection signal OFF in both area A and B No change When the detection signal is OFF for 20 minutes in both area A and B the unit starts energy saving operation Others For dry operation you cann...

Page 52: ...for example in cooling When the microcomputer does not have a signal from the sensor in 20 minutes it judges that nobody is in the room and operates the unit in the temperature shifted from the target temperature Cooling Dry 2 C higher Heating 2 C lower Auto according to the operation mode at that time 1 In case of FAN mode the fan speed reduces by 60 rpm Others For dry operation you cannot set th...

Page 53: ...minutes Ex POWERFUL operation in cooling mode Operation mode Fan speed Target temperature COOL H tap 50 rpm 18 C DRY Dry rotating speed 50 rpm Lowered by 2 5 C HEAT H tap 50 rpm 31 C FAN H tap 50 rpm AUTO Same as cooling heating in POWERFUL operation The target temperature is kept unchanged R7096 Target temp Fan 50 rpm 18 C H tap Set tap 20 minutes Ending condition or in 1 to 3 1 After the lapse o...

Page 54: ...nds while the unit is not operating Refer to Forced operation mode on page 289 for detail Note When the ON OFF button is pressed for 10 seconds or more the forced operation is stopped 1 12 4 Titanium Apatite Photocatalytic Air Purifying Filter This filter combines the Air Purifying Filter and Titanium Apatite Photocatalytic Deodorizing Filter as a single highly effective filter The filter traps mi...

Page 55: ...ge pipe temperature 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 C Indoor Heat Exchanger Thermistor 1 The indoor heat exchanger thermistor is used for controlling target discharge pipe temperature The system s...

Page 56: ...g include defrosting Note Unless specified otherwise an indoor dry operation command is regarded as cooling operation Air conditioner control mode Forced operating mode Forced cooling for Pump Down Operation Normal operating mode Cooling Stop mode except for cooling modes by indoor command Preheating operation During C capacitor is discharging Stop R2830 Air conditioner control mode Forced operati...

Page 57: ...functions Compressor protection input current discharge pipe temperature freeze up protection 3 Determine lower limit frequency The maximum value is set as an lower limit frequency among the frequency lower limits of the following function Pressure difference upkeep 4 Determine prohibited frequency There is a certain prohibited frequency such as a power supply frequency For Heat Pump Model 1 Deter...

Page 58: ...volume airflow rate and other factors PI Control Determine Frequency Up Down by D Signal 1 P control The D value is calculated in each sampling time 15 20 seconds and the frequency is adjusted according to 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 val...

Page 59: ...in open phase stops RK X S20 35G2V1B9 ARXS20 35G3V1B Outdoor temperature 7 C Control A Outdoor temperature 7 C Control B Control A ON condition Discharge pipe temperature 10 C OFF condition Discharge pipe temperature 12 C Radiation fin temperature 90 C Control B ON condition Discharge pipe temperature 20 C OFF condition Discharge pipe temperature 22 C Radiation fin temperature 90 C RK X S50G2V1B A...

Page 60: ...for heating 2 When the operation mode changes to cooling from heating 3 When starting compressor for defrosting or resetting 4 When starting compressor for the first time after the reset with the power is ON 5 When starting compressor for heating next to the suspension of defrosting 6 When starting compressor next to the fault of switching over cooling heating Set the lower limit frequency A Hz fo...

Page 61: ...rther Detail Zone Control Stop zone When the temperature reaches the stop zone the compressor stops Drooping zone The timer starts and the frequency is drooping Keep zone The upper limit of frequency is kept Up zone The upper limit of frequency is increased Reset zone The upper limit of frequency is canceled 20 25 35 class 42 class 50 class A ºC 110 110 110 B ºC 105 103 103 C ºC 101 102 101 5 D ºC...

Page 62: ...r frequency is defined as operation frequency 2 Hz After this the output frequency is pulled down 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 RK X S20 50G2V1B ARXS20 50G2V1B 20 class 25 class 35 class Cooling Heating Cooling Heating Cooling Heating A A 9 25 9 25 9 25 B A Normal mode 6 0 7 5 6 5 7 ...

Page 63: ...to the outdoor temperature The current droops when outdoor temperature becomes higher than a certain level depending on the model 20 class 25 class 35 class Cooling Heating Cooling Heating Cooling Heating A A 9 25 9 25 9 25 B A Normal mode 6 0 7 5 6 25 7 5 8 25 ECONO mode 3 25 3 25 3 25 C A Normal mode 5 25 6 75 5 5 6 75 7 5 ECONO mode 2 5 2 5 2 5 ...

Page 64: ...frequency upper limit to prevent abnormal high pressure Detail R4561 Reset zone Indoor heat exchanger thermistor temperature Up zone Keep zone Drooping zone Stop zone 0 C 5 5 C 7 5 C 9 5 C 13 C Reference Zone Control Stop zone When the temperature reaches the stop zone the compressor stops Drooping zone The timer starts and the frequency is drooping Keep zone The upper limit of frequency is kept U...

Page 65: ...on speed of the outdoor fan is reduced by the command of the indoor outdoor quiet operation 7 Fan control for POWERFUL operation The rotation speed of the outdoor fan is increased while the POWERFUL operation 8 Fan speed control for pressure difference upkeep The rotation speed of the outdoor fan is controlled for keeping the pressure difference while cooling with low outdoor temperature When the ...

Page 66: ...re than A minutes of accumulated time pass since the start of the operation or ending the previous defrosting Conditions for Canceling Defrost The judgment is made with outdoor heat exchanger temperature 4 C 18 C 20 class 25 35 class 42 class 50 class A minutes 28 28 30 44 B Hz 76 76 48 55 C Hz 86 86 70 90 D seconds 50 50 60 60 E seconds 60 60 120 120 F seconds 600 600 650 460 G seconds 50 60 30 3...

Page 67: ...ansion valve control when the discharge pipe thermistor is disconnected Feedback Control 1 Discharge pipe temperature control Detail The followings are the examples of control which function in each mode by the electronic expansion valve control R2833 Control when frequency changed Control for abnormally high discharge pipe temperature Operation pattern function not function When power is turned O...

Page 68: ...f the discharge pipe temperature exceeds a certain value the electronic expansion valve opens and the refrigerant runs to the low pressure side This procedure lowers the discharge pipe temperature 3 11 6 Disconnection of the Discharge Pipe Thermistor Outline The disconnection of the discharge pipe thermistor is detected by comparing the discharge pipe temperature with the condensation temperature ...

Page 69: ... value in a certain time period the target discharge pipe temperature control is canceled and the target opening of the electronic expansion valve is changed according to the shift 3 11 8 Target Discharge Pipe Temperature Control The target discharge pipe temperature is obtained from the indoor and outdoor heat exchanger temperature and the electronic expansion valve opening is adjusted so that th...

Page 70: ...on If the power 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 small comparing with that in the normal operation when refrigerant is insufficient and refrigerant shortage is detected by checking a power consumption II Detecting by discharge pipe temperature If the discharge pipe tempe...

Page 71: ...ly This function turns power supply OFF to the outdoor unit and sets the indoor unit into energy saving mode thus reducing the power consumption of the air conditioner For 20 25 35 class models field setting is required for turning ON the function Refer to Standby Electricity Saving on page 294 for detail ...

Page 72: ...Operation 68 2 5 POWERFUL Operation 71 2 6 OUTDOOR UNIT QUIET Operation 72 2 7 ECONO Operation 73 2 8 TIMER Operation 74 2 9 WEEKLY TIMER Operation 76 3 ATXS20 25 35 42 50G2V1B 81 3 1 Remote Controller 81 3 2 AUTO DRY COOL HEAT FAN Operation 82 3 3 Adjusting the Airflow Direction 84 3 4 COMFORT AIRFLOW Operation 86 3 5 INTELLIGENT EYE Operation 87 3 6 POWERFUL Operation 89 3 7 OUTDOOR UNIT QUIET O...

Page 73: ...ver method of using it In order to meet this expectation of the users giving sufficient explanations taking enough time can be said to reduce about 80 of the requests for servicing However good the installation work is and however good the functions are the customer may blame either the room air conditioner or its installation work because of improper handling The installation work and handing ove...

Page 74: ...on page 18 9 ECONO button ECONO operation page 19 10 SWING button Horizontal blades flaps page 12 11 SWING button Vertical blades louvers page 12 12 COMFORT SENSOR button 13 WEEKLY TIMER operation page 22 14 SELECT button 15 OFF TIMER button page 20 16 ON TIMER button page 21 17 TIMER CANCEL button It cancels the timer setting page 20 21 18 CLOCK button ARC452A3 Open the front cover In this illust...

Page 75: ...ting 4 Press TEMPERATURE adjustment button DRY or FAN mode AUTO or COOL or HEAT mode The temperature setting is not variable Set to the temperature you like The air conditioner operates with the operation mode of your choice From the next time on the air conditioner will operate with the same operation mode Press MODE selector button and select a operation mode Each pressing of the button advances...

Page 76: ... the heating capacity In that case the system switches into defrosting operation to take away the frost A pinging sound may be heard during defrosting operation which however does not mean that the air conditioner has failures This air conditioner cools the room by blowing the hot air in the room outside so if the outside temperature is high the performance of the air conditioner drops The compute...

Page 77: ...played on the LCD 4 The louvers will stop moving disappears from the LCD You can adjust the airflow direction to increase your comfort To adjust the horizontal blades flaps is displayed on the LCD and the flaps will begin to swing When the flaps have reached the desired position press SWING button once more To adjust the vertical blades louvers When the louvers have reached the desired position pr...

Page 78: ...uvers will move in turn Check COMFORT AIRFLOW operation in the section of COMFORT AIRFLOW Operation and INTELLIGENT EYE Operation page 14 When SWING button is selected the flaps swinging range depends on the operation mode See the figure Using three dimensional airflow circulates cold air which tends to collected at the bottom of the room and hot air which tends to collect near the ceiling through...

Page 79: ... go into energy saving mode Press COMFORT SENSOR button and select an operation mode Choose the desired operation mode out of the following sequence Each time the COMFORT SENSOR button is pressed a different setting option is displayed on the LCD Press COMFORT SENSOR button COMFORT AIRFLOW and INTELLIGENT EYE The flaps will adjust the airflow direction upward while cooling and adjust the airflow d...

Page 80: ...d airflow direction is selected the COMFORT AIRFLOW function will be canceled A person is detected in area 1 A person is detected in area 2 The air conditioner will go into energy saving mode after 20 minutes People are detected in both areas No people are detected in the areas Use the INTELLIGENT EYE Operation in combination with the COMFORT AIRFLOW Operation The wind direction may differ from th...

Page 81: ... EYE so that the leftward or rightward airflow will not be directed to the people If no people are detected in either area 1 or 2 in 20 minutes the air conditioner will go into energy saving mode with the set temperature shifted by 2 C The air conditioner may go into energy saving operation even if there are people in the areas This may occur depending on the clothes the people are wearing if ther...

Page 82: ...gs which were used before POWERFUL operation When using POWERFUL operation there are some functions which are not available To cancel POWERFUL operation Press POWERFUL button again POWERFUL Operation cannot be used together with ECONO QUIET or COMFORT Operation Priority is given to the function of whichever button is pressed last POWERFUL Operation can only be set when the unit is running Pressing...

Page 83: ...quency and fan speed on the outdoor unit This function is convenient during night To start OUTDOOR UNIT QUIET operation To cancel OUTDOOR UNIT QUIET operation POWERFUL operation and OUTDOOR UNIT QUIET operation cannot be used at the same time Priority is given to the function of whichever button is pressed last OUTDOOR UNIT QUIET operation will drop neither the frequency nor fan speed if the frequ...

Page 84: ...O operation Running current and power consumption Normal operation ECONO Mode Maximum during normal operation Maximum during ECONO Mode From start up until set temperature is reached The maximum running current and power consumption of the air conditioner in ECONO mode vary with the connecting outdoor unit ECONO Operation can only be set when the unit is running Pressing the OFF button causes the ...

Page 85: ...ime setting reaches the point you like Every pressing of either button increases or decreases the time setting by 10 minutes Holding down either button changes the setting rapidly Press OFF TIMER button again Once you set ON OFF TIMER the time setting is kept in the memory The memory is canceled when remote controller batteries are replaced When operating the unit via the ON OFF Timer the actual l...

Page 86: ...again After a breaker has turned OFF After a power failure After replacing batteries in the remote controller Combined Display Check that the clock is correct If not set the clock to the present time Press SELECT button until the time setting reaches the point you like Every pressing of either button increases or decreases the time setting by 10 minutes Holding down either button changes the setti...

Page 87: ...r settings can be saved for each day of the week It is convenient if the WEEKLY TIMER is set according to the family s life style Example The same timer settings are made for the week from Monday through Friday while different timer settings are made for the weekend Use the copy mode to make settings for Tuesday to Friday because these settings are the same as those for Monday see page 25 Up to 4 ...

Page 88: ...rn to the ON OFF TIMER mode setting press BACK button Go to STEP 9 when setting the OFF TIMER 7 Press NEXT button The time will be set and the temperature blink Setting mode 6 00 8 30 17 30 22 00 25 C 27 C Program 1 Program 2 Program 3 Program 4 ON OFF ON OFF Monday ON OFF Blank ON TIMER OFF TIMER blank Day and number settings ON OFF settings Time settings Temperature settings Setting Displays Mak...

Page 89: ...peration lamp A reservation made once can be easily copied and the same settings used for another day of the week Refer to Copy mode page 25 The day of the week ON OFF TIMER mode time and set temperature only for ON TIMER mode can be set with WEEKLY TIMER Other settings for ON TIMER are based on the settings just before the operation Both WEEKLY TIMER and ON OFF TIMER operation cannot be used at t...

Page 90: ...ion made once can be copied another day of the week The whole reservation of the selected day of the week will be copied Tuesday to Friday Press SELECT button to confirm the day of the week to be copied Press COPY button to activate copy mode The whole reservation of the selected day of the week will be copied Press SELECT button to select the destination day of the week The reservation will be co...

Page 91: ... of the selected day of the week will be deleted 8 Hold WEEKLY button for 5 seconds while normal display Be sure to direct the remote control toward the main unit and check for a receiving tone This operation is not effective while WEEKLY TIMER is being set All reservations will be deleted The individual reservation The reservations for each day of the week All reservations Setting Displays Normal...

Page 92: ... SWING button Louvers vertical blades page 12 12 COMFORT SENSOR button 13 ON TIMER button page 21 14 OFF TIMER button page 20 15 TIMER Setting button It changes the time setting 16 TIMER CANCEL button It cancels the timer setting 17 CLOCK button 18 RESET button Restart the unit if it freezes Use a thin object to push R ARC433A85 QUIET button OUTDOOR UNIT QUIET operation page 18 COMFORT AIRFLOW and...

Page 93: ...e temperature setting 4 Press TEMPERATURE adjustment button DRY or FAN mode AUTO or COOL or HEAT mode The temperature setting is not variable Set to the temperature you like R The air conditioner operates with the operation mode of your choice From the next time on the air conditioner will operate with the same operation mode Press MODE selector button and select a operation mode Each pressing of ...

Page 94: ... appliance in combination with the air conditioner The heat pump system heats the room by circulating hot air around all parts of the room After the start of heating operation it takes some time before the room gets warmer In heating operation frost may occur on the outdoor unit and lower the heating capacity In that case the system switches into defrosting operation to take away the frost A pingi...

Page 95: ...op moving disappears from the LCD To adjust the vertical blades louvers 3 Press SWING button is displayed on the LCD 4 The louvers will stop moving disappears from the LCD R To adjust the horizontal blades flaps is displayed on the LCD and the flaps will begin to swing When the flaps have reached the desired position press SWING button once more When the louvers have reached the desired position p...

Page 96: ...nd display will light up and the flap and louvers will move in turn When SWING button is selected the flaps swinging range depends on the operation mode See the figure Using three dimensional airflow circulates cold air which tends to collected at the bottom of the room and hot air which tends to collect near the ceiling throughout the room preventing areas of cold and hot developing Always use a ...

Page 97: ...ill provide a comfortable wind that will not come in direct contact with people To start COMFORT AIRFLOW operation Press COMFORT SENSOR button and select on the LCD Each time the COMFORT SENSOR button is pressed a different setting option is displayed on the LCD By selecting from the following icons the air conditioner will be in COMFORT AIRFLOW operation combined with INTELLIGENT EYE operation pa...

Page 98: ...ress COMFORT SENSOR button and select on the LCD Each time the COMFORT SENSOR button is pressed a different setting option is displayed on the LCD By selecting from the following icons the air conditioner will be in COMFORT AIRFLOW operation combined with INTELLIGENT EYE operation page 16 To cancel the INTELLIGENT EYE operation The air conditioner is in normal operation while the sensor is detecti...

Page 99: ...ghtly in FAN mode only If no presence detected in the room for 20 minutes Vertical angle 90 Side View Horizontal angle 110 Top View Sensor detection sensitivity changes according to indoor unit location the speed of passersby temperature range etc The sensor also mistakenly detects pets sunlight fluttering curtains and light reflected off of mirrors as passersby To combine COMFORT AIRFLOW Operatio...

Page 100: ... To cancel POWERFUL operation To maximize the cooling heating effect the capacity of outdoor unit must be increased and the airflow rate be fixed to the maximum setting The temperature and airflow settings are not variable POWERFUL operation will not increase the capacity of the air conditioner if the air conditioner is already in operation with its maximum capacity demonstrated POWERFUL Operation...

Page 101: ...quency and fan speed on the outdoor unit This function is convenient during night To start OUTDOOR UNIT QUIET operation To cancel OUTDOOR UNIT QUIET operation POWERFUL operation and OUTDOOR UNIT QUIET operation cannot be used at the same time Priority is given to the function of whichever button is pressed last OUTDOOR UNIT QUIET operation will drop neither the frequency nor fan speed if the frequ...

Page 102: ...on Maximum during ECONO Mode Normal operation From start up until set temperature is reached ECONO Mode The maximum running current and power consumption of the air conditioner in ECONO mode vary with the connecting outdoor unit ECONO Operation can only be set when the unit is running Pressing the OFF button causes the setting to be canceled and the disappears from the LCD ECONO operation is a fun...

Page 103: ...u can also use OFF TIMER and ON TIMER in combination To use OFF TIMER operation Press TIMER Setting button until the time setting reaches the point you like Every pressing of either button increases or decreases the time setting by 10 minutes Holding down either button changes the setting rapidly Once you set ON OFF TIMER the time setting is kept in the memory The memory is canceled when remote co...

Page 104: ...es set the timer again After a breaker has turned OFF After a power failure After replacing batteries in the remote controller Example Combined Check that the clock is correct If not set the clock to the present time Press TIMER Setting button until the time setting reaches the point you like Every pressing of either button increases or decreases the time setting by 10 minutes Holding down either ...

Page 105: ...door Unit PCB Abnormality 112 4 9 OL Activation Compressor Overload 114 4 10 Compressor Lock 115 4 11 DC Fan Lock 116 4 12 Input Overcurrent Detection 117 4 13 Four Way Valve Abnormality 118 4 14 Discharge Pipe Temperature Control 120 4 15 High Pressure Control in Cooling 122 4 16 Compressor System Sensor Abnormality 124 4 17 Position Sensor Abnormality 126 4 18 DC Voltage Current Sensor Abnormali...

Page 106: ...rotection device of the indoor or outdoor unit is activated or when the thermistor malfunctions 2 When a signal transmission error occurs between the indoor and outdoor units In either case conduct the diagnostic procedure described in the following pages Outdoor Unit The outdoor unit has one green LED LED A on the PCB When the LED A blinks the microcomputer works in order R12187 Operation lamp gr...

Page 107: ...Heating operation cannot be used when the outdoor temperature is 20 C or higher and cooling operation cannot be used when the outdoor temperature is below 10 C Diagnose with remote controller indication 103 The unit operates but does not cool or does not heat Check for wiring and piping errors in the connection between the indoor and outdoor units Conduct the wiring piping error check described on...

Page 108: ...ence shown below Note 1 A short beep pi and two consecutive beeps pi pi indicate 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 No Code No Code No Code 1 00 13 C7 25 UA 2 U4 14 A3 26 UH 3 L5 15 H8 27 P4 4 E6 16 H9 28 L3 5 H6 17 C9 29 L4 6 H0 18 C4 3...

Page 109: ... hear the sound of beep or pi pi 3 Diagnose by the sound pi The figure of the ten s place does not accord with the error code pi pi The figure of the ten s place accords with the error code but the one s not beep The both figures of the ten s and one s place accord with the error code Error codes and description Refer to page 103 4 Press the MODE button The figure of the one s place blinks R8381 R...

Page 110: ...both figures of the ten s and one s place accord with the error code 7 Determine the error code The figures indicated when you hear the beep sound are error code Error codes and description Refer to page 103 8 Press the MODE button to exit from the diagnosis mode The display means the trial operation mode Refer to page 291 for trial operation 9 Press the ON OFF button twice to return to the normal...

Page 111: ...n below Note 1 A short beep pi and two consecutive beeps pi pi indicate 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 No Code No Code No Code 1 00 12 F6 23 A1 2 U4 13 C7 24 E1 3 L5 14 A3 25 UA 4 E6 15 H8 26 UH 5 H6 16 H9 27 P4 6 H0 17 C9 28 L3 7 A6...

Page 112: ...p or pi pi 3 Diagnose by the sound pi The figure of the ten s place does not accord with the error code pi pi The figure of the ten s place accords with the error code but the one s not beep The both figures of the ten s and one s place accord with the error code The figures indicated when you hear the beep sound are error code Error codes and description Refer to page 103 4 Press the MODE button ...

Page 113: ... both figures of the ten s and one s place accord with the error code 7 Determine the error code The figures indicated when you hear the beep sound are error code Error codes and description Refer to page 103 8 Press the MODE button to exit from the diagnosis mode The display means the trial operation mode Refer to page 291 for trial operation 9 Press the ON OFF button twice to return to the norma...

Page 114: ...ity 109 Outdoor Unit E1 Outdoor unit PCB abnormality 112 E5 OL activation compressor overload 114 E6 Compressor lock 115 E7 DC fan lock 116 E8 Input overcurrent detection 117 EA Four way valve abnormality 118 F3 Discharge pipe temperature control 120 F6 High pressure control in cooling 122 H0 Compressor system sensor abnormality 124 H6 Position sensor abnormality 126 H8 DC voltage current sensor a...

Page 115: ...tion of connector Troubleshooting Note Check the following connector Check the combination of the indoor and outdoor unit OK Check the connection of connectors See Note Correct the connection OK Error repeats YES NO NO YES NO YES R11704 Caution To secure the connection once disconnect the connector and then reconnect it Match the compatible models Replace the indoor unit PCB 1 Replace the indoor u...

Page 116: ...uring heating operation the temperature detected by the indoor heat exchanger thermistor is used for the heating peak cut control operation halt outdoor fan stop etc Malfunction Decision Conditions Freeze up protection control During cooling operation the indoor heat exchanger temperature is below 0 C Heating peak cut control During heating operation the indoor heat exchanger temperature is above ...

Page 117: ...lean the air filter Clean the indoor heat exchanger Replace the indoor unit PCB Replace the thermistor Does it conform to the thermistor characteristic chart Check the air filter Check the dust accumulation on the indoor heat exchanger Is there any short circuit Is it very dirty Is it very dirty Check the air passage Be sure to turn off the power switch before connecting or disconnecting connector...

Page 118: ...n is used to determine abnormal fan motor operation Malfunction Decision Conditions The detected rotation speed does not reach the demanded rotation speed of the target tap and is less than 50 of the maximum fan motor rotation speed Supposed Causes 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 moto...

Page 119: ...e fan rotate smoothly Does the fan rotate Is the motor power supply voltage 310 340 VDC generated Is the motor control voltage 15 VDC generated Turn off the power supply and rotate the fan by hand Turn the power on and start operation Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Check No 01 Check the output of the fan motor connector R1...

Page 120: ...compressor operation Supposed Causes Disconnection of connector Defective thermistor Defective indoor unit PCB Troubleshooting Check No 06 Refer to P 148 C4 Indoor heat exchanger thermistor C9 Room temperature thermistor YES R7134 NO Check No 06 Check the thermistor resistance value YES NO Caution Correct the connection Replace the thermistor Replace the indoor unit PCB Is it normal Is it normal C...

Page 121: ...supply waveform Check the voltage of the connection wires on the indoor terminal board between No 1 and No 3 and between No 2 and No 3 YES YES Replace the indoor unit PCB Locate the cause of the disturbance of the power supply waveform and correct it NO R12160 NO YES YES NO NO Caution Correct the indoor unit outdoor unit connection wires Diagnose the outdoor unit PCB Before you check the LED A can...

Page 122: ... wiring of connecting wires Wrong indoor unit PCB or outdoor unit PCB mounted Defective indoor unit PCB Defective outdoor unit PCB Troubleshooting R11707 Caution NO YES YES YES NO NO Check the code numbers 2P01234 for example of the indoor and outdoor unit PCB with the Parts List Match the compatible models Change for the correct PCB Replace the indoor unit PCB or the outdoor unit PCB OK Matched c...

Page 123: ...Noise Momentary fall of voltage Momentary power failure etc Troubleshooting 20 25 35 50 class Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged NO YES YES R12161 YES NO NO Replace the outdoor unit PCB Ground the system Zero cross signal abnormality Replace the outdoor unit PCB 1 Replace the harness Check to see if the outdoor unit is...

Page 124: ... Replace the outdoor unit PCB Replace the harness Check to see if the outdoor unit is grounded Is LED A blinking Grounded NO Replace the connecting wires between the indoor and outdoor units Check the voltage between No 1 and No 2 on the outdoor terminal board Is it normal Is the harness broken Turn on the power again Before you check the LED A cancel the standby electricity saving function by ope...

Page 125: ...ective stop valve Troubleshooting Check No 04 Refer to P 146 Check No 05 Refer to P 147 Check No 06 Refer to P 148 Check No 11 Refer to P 150 R11999 Caution YES NG Discharge pipe thermistor NO OK OK NG Refrigerant shortage Water mixed Stop valve NG OK NG OK Insert the thermistor in position Replace the discharge pipe thermistor Replace the electronic expansion valve or the coil Refer to the refrig...

Page 126: ...tes without any other error Supposed Causes Compressor locked Compressor harness disconnected Troubleshooting Check No 14 Refer to P 152 Turn off the power Disconnect the harnesses U V and W R14170 Caution NO YES YES NO NO YES Check No 14 Check with the inverter checker Turn off the power and reconnect the harnesses Turn on the power again and restart the system Precaution before turning on the po...

Page 127: ...ther error Supposed Causes Disconnection of the fan motor Foreign matters stuck in the fan Defective fan motor Defective outdoor unit PCB Troubleshooting Check No 15 Refer to P 154 R11708 Caution YES YES NO YES NO NO YES NO Turn on the power Rotate the fan Check No 15 Check the rotation pulse input on the outdoor unit PCB Turn off the power and reconnect the connector Remove them Replace the outdo...

Page 128: ...rn 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 wires have been disconnected and reconnected for part replacement for example and the system is interrupted by an input overcurrent take the following procedure R14171 NO YES YES NO Start operation and measure the input current Check No 08 ...

Page 129: ...nditions A following condition continues over 1 10 minutes depending on the model after operating for 5 10 minutes depending on the model Cooling Dry room thermistor temp indoor heat exchanger temp 5 C Heating indoor heat exchanger temp room thermistor temp 5 C If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes D...

Page 130: ...r way valve defective or dust clogged Reconnect in position Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged R11710 Four way valve coil disconnected loose Harness out of connector Any thermistor disconnected Check No 06 Check the thermistors Check No 11 Check the refrigerant line Check No 05 Check the four way valve switching output...

Page 131: ...ts the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Defective discharge pipe thermistor Defective outdoor heat exchanger thermistor or outdoor temperature thermistor Defective electronic expansion valve or coil Refrigerant shortage Defective four way valve Water mixed in refrigerant Defective stop valve Defective outdoor unit PCB S...

Page 132: ...frigerant shortage Four way valve Water mixed Stop valve OK OK OK NG NG Check No 06 Check the thermistors Check No 11 Check the refrigerant line Check No 04 Check the electronic expansion valve Replace the defective thermistor Replace the electronic expansion valve or the coil Refer to the refrigerant line check procedure Replace the outdoor unit PCB Be sure to turn off the power switch before con...

Page 133: ...onditions The temperature sensed by the outdoor heat exchanger thermistor rises above A C The error is cleared when the temperature drops below B C Supposed Causes The installation space is not large enough Dirty outdoor heat exchanger Defective outdoor fan motor Defective stop valve Defective electronic expansion valve or coil Defective outdoor heat exchanger thermistor Defective outdoor unit PCB...

Page 134: ...e outdoor unit PCB Replace the electronic expansion valve or the coil Replace the outdoor unit PCB Change the installation location or direction Clean the outdoor heat exchanger Check the installation space NG OK OK NG NG OK OK OK NG NG Check No 09 Check the outdoor fan Check No 08 Check the discharge pressure Check No 04 Check the electronic expansion valve Check No 06 Check the outdoor heat exch...

Page 135: ...nsor output converted to voltage value The DC voltage before compressor start up is below 50 V Supposed Causes Broken or disconnection of 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 R11712 YES Turn off the power and turn it on again YES NO Replace the harness No problem Keep...

Page 136: ...NO YES Connect it properly NO YES Replace the reactor NO YES Replace the compressor or the compressor relay harness Restart the operation again and if the error occurs again replace the outdoor unit PCB NO YES Disconnect the reactor from the outdoor unit PCB and measure the resistance value between reactor terminals with tester Disconnect the compressor relay harness from the outdoor unit PCB and ...

Page 137: ...ing condition through the position detection circuit Malfunction Decision Conditions If the error repeats the system is shut down Reset condition Continuous run for about 11 minutes 50 class 5 minutes without any other error Supposed Causes Disconnection of the compressor relay cable Defective compressor Defective outdoor unit PCB Start up failure caused by the closed stop valve Input voltage is o...

Page 138: ...rated R14172 NO NO NO YES YES NO YES YES Check No 29 Check the short circuit of the diode bridge Check No 14 Check with the inverter checker 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 Replace the compressor Correct the power supply ...

Page 139: ...ower Correct the power supply Voltage as rated R14173 NO NO YES NO YES YES Check No 14 Check with the inverter checker 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 Replace the compressor Correct the power supply or replace the outdoor...

Page 140: ...or running frequency and the input current Malfunction Decision Conditions The compressor running frequency is above 52 Hz If the error repeats 4 times 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 Caution Be sure to turn off the power switch before connecti...

Page 141: ...ning frequency and CT detected input current Malfunction Decision Conditions The compressor running frequency is more than 55 Hz and the CT input current is below 0 5 A If the error repeats 4 times the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Defective power module Breakage of wiring or disconnection Defective reactor Defective...

Page 142: ...n on the power again and restart operation Current guideline Compressor running 320 50 VDC Any LED OFF Running current as shown at right with relay cable 1 or 2 Voltage within the allowable range Supply voltage 15 Replace the outdoor unit PCB Replace the outdoor unit PCB Replace the outdoor unit PCB Check the supply voltage Replace the compressor Capacitor charged when the indoor unit or outdoor u...

Page 143: ... V 42 class 0 02 V with the power on J3 error is judged if the discharge pipe temperature is lower than the heat exchanger temperature Supposed Causes Disconnection of the connector for the thermistor Defective thermistor 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 Defect...

Page 144: ... following thermistors Outdoor temperature thermistor Discharge pipe thermistor Outdoor heat exchanger thermistor Cooling Outdoor heat exchanger temperature Heating Indoor heat exchanger temperature Replace the indoor heat exchanger thermistor Replace the outdoor unit PCB Replace the indoor unit PCB Error displayed again on remote controller Indoor heat exchanger thermistor functioning Check No 06...

Page 145: ...ture is above A C 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 it 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 RK X S20 ...

Page 146: ... temperature Check No 07 Check the installation condition Radiation fin dirty Above A C Check No 09 Check the outdoor fan or related Error again or outdoor fan activated Replace the outdoor unit PCB Replace the fan motor Correct the connectors and fan motor lead wire Replace the outdoor unit PCB Clean up the radiation fin Be sure to turn off the power switch before connecting or disconnecting conn...

Page 147: ...leared 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 Silicon grease is not applied properly on the radiation fin after replacin...

Page 148: ...nit fan or related Error displayed again Has PCB been replaced Check if the silicon grease applied properly on the radiation fin If not apply it See Note Check the power transistor and the radiation fin for looseness If they are found to be fit tightly replace the outdoor unit PCB or the power transistor Replace the fan motor Correct the connectors and fan motor leads Replace the outdoor unit PCB ...

Page 149: ...while the compressor is running A 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 50 class 5 minutes without any other error Supposed Causes Poor installation condition Closed stop valve Defective ...

Page 150: ...dule Check No 07 Check the installation condition Check No 14 Check with the inverter checker Turn off the power and disconnect the harnesses U V and W Turn off the power and reconnect the harnesses Turn on the power again and start operation Turn off the power and turn it on again to start the system See if the same error occurs Check the supply voltage Keep on using as it is Check the connectors...

Page 151: ...gerant shortage detection III Refrigerant shortage is detected by checking the difference between suction and discharge temperature Malfunction Decision Conditions Refrigerant shortage detection I The following conditions continue for 7 minutes 20 25 35 42 class Input current input voltage A output frequency B Output frequency C 50 class Input current D output frequency E Output frequency F Refrig...

Page 152: ...auses Disconnection of the discharge pipe thermistor indoor or outdoor heat exchanger thermistor room or outdoor temperature thermistor Closed stop valve Refrigerant shortage refrigerant leakage Poor compression performance of compressor Defective electronic expansion valve K C Cooling room thermistor temperature indoor heat exchanger temperature 4 0 outdoor heat exchanger temperature outdoor temp...

Page 153: ...e pipe flare or replace the union Check the power transistor harness for looseness Correct it as required Also replace the cracked pipe Check the pipes for improper contact Correct them as required Also replace the cracked pipe Replace the electronic expansion valve Replace the defective one s Completed Refrigerant shortage error again Oil oozing at internal piping Stop valve closed Compressor vib...

Page 154: ...voltage detection The voltage detected by the DC voltage detection circuit is below 150 180 V depending on the model Over voltage detection An over voltage signal is fed from the over voltage detection circuit to the microcomputer The voltage is over 400 V If the error repeats the system is shut down Reset condition Continuous run for about 11 minutes 50 class 5 minutes without any other error Sup...

Page 155: ... before connecting or disconnecting connectors or parts may be damaged NO YES YES NO YES Precaution before turning on the power again NO Replace the fan motor or the outdoor unit PCB Check the supply voltage Rotate the fan by hand Disturbance factors Noise Power supply distortion Repeat a few times Make sure the power has been off for at least 30 seconds Turn on the power again System restarted Do...

Page 156: ...when the data sent from the PM1 can not be received for 9 seconds The error counter is reset when the data from the PM1 can be successfully received Supposed Causes Defective outdoor unit PCB Troubleshooting R7185 Caution NO YES Turn off the power and turn it on again Error again Replace the outdoor unit PCB The cause can be an external factor other than the malfunction Observe the operating condi...

Page 157: ...wer off and on again and check to see if the EV generate latching sound 3 If the EV does not generate latching sound in the above step 2 disconnect the connector and check the continuity using a tester 4 Check the continuity between the pins 1 6 and 3 6 and between the pins 2 5 and 4 5 If there is no continuity between the pins the EV coil is faulty 5 If the continuity is confirmed in the above st...

Page 158: ... coil from the connector and check the continuity Start heating operation Four way valve coil Cooling Dry No continuity Heating Continuity Replace the outdoor unit 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 ...

Page 159: ...ture and resistance is shown in the table and the graph below For the models in which the thermistor is directly mounted on the PCB disconnect the connector for the PCB and measure Thermistor temperature C Resistance kΩ 20 211 0 15 150 0 10 116 5 5 88 0 0 67 2 5 51 9 10 40 0 15 31 8 20 25 0 25 20 0 30 16 0 35 13 0 40 10 6 45 8 7 50 7 2 R25 C 20 kΩ B 3950 K Tester Resistance range R11906 kΩ 150 100...

Page 160: ...e outdoor heat exchanger very dirty Change the installation location or direction Change the installation location or direction Clean the outdoor heat exchanger Change the installation location or direction Check the outdoor temperature The outdoor temperature should be 46 C or lower R11718 Not dirty YES YES Dirty NO NO NO YES Is the air filter or indoor outdoor heat exchanger dirty Is the connect...

Page 161: ...orm disturbance near the zero cross sections circled in Fig 2 5 1 9 Inverter Units Refrigerant System Check Check No 11 R7159 YES YES NO NO Outdoor fan system is functioning Check the outdoor fan system Go to Check No 15 Outdoor fan running Fan motor lead wire connector disconnected Reconnect the connector Fig 1 Fig 2 Refrigerant system check Check for refrigerant leakage See the service diagnosis...

Page 162: ...from the outdoor unit PCB To disengage the connector press the protrusion on the connector Follow the procedure below to measure resistance between the terminals of the DB1 and the terminals of the compressor with a multi tester Evaluate the measurement results for a judgment OL lead wire Thermistor lead wire Fan motor lead wire Compressor lead wire Reactor lead wire Four way valve lead wire Elect...

Page 163: ...er off Step 2 Install the inverter checker instead of a compressor Note Make sure the charged voltage of the built in smoothing electrolytic 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 f...

Page 164: ...ts Diagnose method Diagnose according to 6 LEDs lighting status 1 When all the LEDs are lit uniformly the compressor is defective Replace the compressor 2 When the LEDs are not lit uniformly check the power module Refer to Check No 13 3 If NG in Check No 13 replace the power module control PCB If OK in Check No 13 check if there is any solder cracking on the filter PCB 4 If any solder cracking is ...

Page 165: ...motor is rotated 1 turn by 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 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 RK X S20 35G2V1B9 ARXS20 35G3V1B 1 Check that the voltage between the pins 10 11 is 15 VDC 2 Check if the Hall IC ge...

Page 166: ...ance between the pins of the DB1 as below If the resistance is or less than 1 kΩ short circuit occurs on the main circuit 20 25 35 class 42 class terminal of the tester in case of digital terminal 2 3 4 2 3 1 terminal of the tester in case of digital terminal 4 2 3 1 2 3 Resistance in OK several kΩ several MΩ several kΩ several MΩ Resistance in NG 0 Ω or 0 0 0 Ω or R12035 Tester 1 2 3 4 R12266 Tes...

Page 167: ...0 35G2V1B9 ARXS20 35G3V1B 211 3 1 Removal of Outer Panels Fan Motor 211 3 2 Removal of Electrical Box 220 3 3 Removal of PCB 223 3 4 Removal of Reactor Partition Plate 231 3 5 Removal of Sound Blanket 233 3 6 Removal of Four Way Valve 235 3 7 Removal of Compressor 238 4 Outdoor Unit RK X S42G2V1B ARXS42G2V1B 240 4 1 Removal of Outer Panels 240 4 2 Removal of Electrical Box 242 4 3 Removal of PCB 2...

Page 168: ... pressed for 5 seconds the forced cooling operation is performed for about 15 minutes 2 Remove the air filter 1 Hold the both sides of the front panel and open the panel to the position where it stops 2 Slightly push up the center knob of the air filter and release the hooks The air filter is not marked for difference between the right and left sides The air filter can be set easily by inserting i...

Page 169: ...rifying filter is not marked for difference between the right and left sides 2 Remove the Titanium apatite photocatalytic air purifying filter ASSY by bending the air filter and unfastening the projections from the air filter frame 3 Remove the Titanium apatite photocatalytic air purifying filter from its frame at 5 positions by bending it Step Procedure Points R7904 Air filter Titanium apatite ph...

Page 170: ...r supplies before disassembling work Step Procedure Points 1 Hold the both sides of the front panel and open the panel over the position where it stops 2 Slide the left rotary shaft to the right and release it 3 Slide the right rotary shaft to the left and release it 4 Remove the front panel R7906 Front panel R7907 Rotary shaft R7909 Rotary shaft R7910 ...

Page 171: ...e front panel make sure that the shaft is fitted in the guide before closing the panel Caution on Mounting When mounting the front panel fit the right and left rotary shafts one by one into the grooves and fully push them in position Step Procedure Points R7908 Shaft ...

Page 172: ...r supplies before disassembling work Step Procedure Points 1 Remove the service cover 1 Remove the screw of the service cover Preparation Remove the front panel according to the Removal of Front Panel 2 Pull out the service cover diagonally down in the direction of the arrow 3 The figure shows the appearance of the inside R7911 Service cover R8077 R7913 ...

Page 173: ... 162 2 Remove the front grille 1 Remove the 2 screws one each at the right and left 2 The front grille has 3 hooks at the top 3 Unfasten the left hook 4 Unfasten the center hook Step Procedure Points R12267 R8076 Hooks R7917 Front grille R7918 ...

Page 174: ...the right hook 6 Pull the upper part of the front grille out and lift the lower part up and then remove the front grille Caution on Mounting When mounting the front grille make sure that the 3 hooks are fastened as they were Step Procedure Points R8078 R12268 ...

Page 175: ...o the upper side and the small horizontal blade to the lower side Do not put them in the wrong place 2 Unfasten the center shaft while bending the horizontal blade large slightly 3 Unfasten the left shaft 4 Unfasten the key alignment shaft at the right side Caution on Mounting There is a key alignment at the right shaft When mounting insert the right shaft first while turning After inserting the r...

Page 176: ...ing the horizontal blade small slightly 2 Unfasten the left shaft 3 Unfasten the key alignment shaft at the right side 3 Remove the fan guard 1 Unfasten the hooks at the lower part of the fan guard with a flat screwdriver 2 Remove the fan guard Step Procedure Points R7925 Horizontal blade small R7926 R7927 Key R7928 R8079 ...

Page 177: ...ock rod 3 Unfasten the hooks at the upper 3 positions by pressing them with a flat screwdriver 4 Remove the vertical blade ASSY A vertical blade ASSY has 5 fins It is impossible to replace only one fin The vertical blade ASSY is not marked for difference between right and left Step Procedure Points R12270 Vertical blade ASSY Pivot Interlock shaft R10302 Interlock rod R10303 R12269 Hook ...

Page 178: ...ep Procedure Points 1 The figure shows the connections of wire harnesses Preparation Remove the front grille according to the Removal of Front Grille 2 Remove the screw of the wire fixture 3 Remove the screws on the terminal board to disconnect the connecting wires 4 Disconnect the connector for fan motor S1 R7931 Electrical box R7932 Wire fixture R7933 Terminal board Connecting wires R7934 S1 ...

Page 179: ...Release the harness for swing motors from the hook 7 Pull out the indoor heat exchanger thermistor Be careful not to lose the clip of the thermistor 8 Remove the screw and detach the earth wire Step Procedure Points R7935 S41 R7936 R7937 Indoor heat exchanger thermistor Clip R11268 R7938 Earth wire ...

Page 180: ... at the upper far side by pressing it from above and pulling the electrical box toward yourself 11 Lift up the electrical box and pull it out There is a hook also at the lower part of the back When mounting the electrical box make sure that it is securely fastened Step Procedure Points R3939 R8081 Hook R8082 ...

Page 181: ...ation Remove the electrical box according to the Removal of Electrical Box 2 Unfasten the hooks at the upper 2 positions of the shield plate 3 Unfasten the hook at the side of the shield plate 4 Lift up the shield plate to unfasten the lower hooks and remove it 2 Remove the terminal board 1 Remove the screw to remove the terminal board R8083 Signal receiver PCB Control PCB Shield plate INTELLIGENT...

Page 182: ...e the signal receiver unit 1 Unfasten the 3 hooks 2 Unfasten the book on the opposite side and lift up the signal receiver unit 3 Remove the signal receiver unit Step Procedure Points R12277 Signal receiver unit R8262 R12278 Hook R8088 Signal receiver unit ...

Page 183: ...NT EYE sensor PCB 2 Disconnect the connector S26 from the INTELLIGENT EYE sensor PCB 5 Remove the signal receiver PCB 1 Unfasten the 3 hooks and remove the signal receiver PCB 2 Disconnect the connector S48 from the signal receiver PCB Step Procedure Points R8092 INTELLIGENT EYE sensor PCB R8093 S26 R8090 Signal receiver PCB R8091 S48 ...

Page 184: ...ure shows the connection of wire harness for the display PCB 2 Unfasten the 4 hooks and remove the display PCB 3 Disconnect the connector S49 from the display PCB 7 Remove the control PCB 1 Unfasten the lower 2 hooks of the control PCB Step Procedure Points R8094 Display PCB R10318 Hook R8096 LED 3 Green LED 1 Green S49 LED 2 Yellow R8097 Hook Control PCB ...

Page 185: ...igures show the names of the PCB component parts S1 DC fan motor S21 HA connector S25 INTELLIGENT EYE sensor PCB S26 control PCB S32 indoor heat exchanger thermistor S41 swing motors S46 display PCB S47 signal receiver PCB S48 S49 control PCB Refer to page 19 20 for detail Step Procedure Points R8098 R8099 S32 S1 S21 S47 S25 S46 S41 R8100 S48 S49 S26 LED2 Yellow LED3 Green LED1 Green ...

Page 186: ...air may be sucked in to generate an over pressure in refrigeration cycle thus resulting in pipe rupture or accidental injury 3 Lift up the indoor unit slightly and pull out the drain hose The illustration is for the case of left piping Place a plastic sheet under the drain pan to prevent from wetting the floor with remaining drain If the drain hose is embedded in the wall disconnect the drain hose...

Page 187: ...out the pipe 2 Widen the auxiliary pipe by about 10 20 degrees Caution When dismounting or mounting the indoor heat exchanger be sure to wear gloves or wrap it with cloth before proceeding You may be injured by the fins 3 Remove the 2 screws on the left side 4 Unfasten the lower hook on the right side with a flat screwdriver Step Procedure Points R10622 Piping fixture R10543 Unbending angle 10 20 ...

Page 188: ...nfastening the lower hooks lift up the indoor heat exchanger by its right side When mounting the indoor heat exchanger make sure that the hook right is fastened 6 Remove the indoor heat exchanger Step Procedure Points R10327 Indoor heat exchanger Hook R10328 ...

Page 189: ...before disassembling work Step Procedure Points 1 Remove the swing motor for vertical blade 1 Lift the indoor unit with a wooden base 2 Remove the screw behind the drain hose and disconnect the drain hose 3 Remove the screw at the rear and remove the screws on the right and the left side of the swing motors R10323 R10329 Drain hose R10330 Swing motors ...

Page 190: ...screwdriver 5 Remove the swing motor unit 6 Detach the interlock shaft from the swing motor with a flat screwdriver 7 Remove the vertical blade interlock with a flat screwdriver Step Procedure Points R12270 Vertical blade ASSY Pivot Interlock shaft R8126 Swing motor unit R8127 Interlock shaft R10331 Vertical blade interlock ...

Page 191: ...BE04 808_B Indoor Unit Removal Procedure 180 8 Remove the 2 screws 9 Remove the swing motor for vertical blade 10 Disconnect the connector Connector green Step Procedure Points R10332 Screws R10333 R10334 ...

Page 192: ...posite the horizontal blades do not move smoothly or the noise may be heard 1 Set the motor for the upper blade first connector white 2 Then set the motor for the lower blade connector red 3 Fix the both motors with a screw 1 Remove the screw and remove the swing motors for horizontal blades 2 Disconnect the harnesses from the motors Step Procedure Points R8131 Connector for lower blade red Connec...

Page 193: ... least 10 min before disassembling work Step Procedure Points 1 Remove the right side panel Preparation Remove the indoor heat exchanger according to the Removal of Indoor Heat Exchanger 1 Remove the 2 screws and remove the right side panel 2 Release the fan motor wire harness from the hook R8112 R8113 Right side panel R8114 R8115 ...

Page 194: ... screws of the fan motor fixing plate 4 Unfasten the hook of the fan motor fixing plate and remove the plate 2 Remove the fan rotor 1 Dislocate the fan rotor by sliding it to the right Step Procedure Points R8116 Fan motor fixing plate R8117 R8118 R8119 Fan rotor ...

Page 195: ...th approx 5 mm left 2 Tighten the screw until it stops Then turn the screw in one scroll 3 Move the fan rotor and confirm the fan motor and the fan rotor are installed appropriately 4 Tighten the screw completely if appropriate 5 If not appropriate go back to 1 3 Press the bearing ASSY from outside 4 Remove the bearing Step Procedure Points R8120 Lock screw Fan motor R2808 Side face of rotor Side ...

Page 196: ... power supplies before disassembling work Step Procedure Points 1 Appearance features Take care not to cut your finger by the fins of the outdoor heat exchanger 2 Remove the panels The stop valve cover is united with the shield plate When reassembling make sure to fit the 5 hooks 1 Remove the screw of the stop valve cover Pull down the stop valve cover and remove it DAIKIN INVERTER R7186 R11890 St...

Page 197: ...the 2 screws and lift the top panel 3 Remove the drip proof plate 4 Remove the 4 screws and remove the discharge grille The discharge grille has 4 hooks Step Procedure Points DAIKIN INVERTER Top panel R7190 DAIKIN INVERTER R7191 Drip proof plate DAIKIN INVERTER R7192 Discharge grille R7193 ...

Page 198: ...20 35G2V1B SiBE04 808_B 187 Removal Procedure 5 Remove the 8 screws of the front panel 6 Unfasten the hooks Pull and remove the front panel The front panel has 4 hooks Step Procedure Points DAIKIN INVERTER R7194 Front panel R7195 Hooks ...

Page 199: ...n motor The screw has reverse winding Nut size M6 1 Remove the washer fitted nut of the outdoor fan 2 Remove the outdoor fan When reassembling align mark of the outdoor fan with D cut section of the motor shaft 3 Cut the clamp Step Procedure Points R7196 Outdoor fan 10 mm R12236 D cut R7197 R7198 ...

Page 200: ...put the fan motor lead wire through the back of the fan motor so as not to be entangled with the outdoor fan 7 Remove the 4 screws and remove the fan motor Be sure to remove the lower screws first If the upper screws are removed first the fan motor the center of gravity of which is toward the front may tilt down or fall getting you injured Step Procedure Points R9332 S70 Fan motor lead wire R7200 ...

Page 201: ...X S20 35G2V1B ARXS20 35G2V1B Removal Procedure 190 8 Remove the screw and remove the fan motor fixing frame When reassembling fit the lower hooks into the bottom frame Step Procedure Points R7204 Fan motor fixing frame R7205 R7206 ...

Page 202: ..._B 191 Removal Procedure 4 Remove the right side panel 1 Remove the 2 screws on the rear side 2 Release the outdoor temperature thermistor 3 Lift up the guard net and remove it Step Procedure Points R7207 R7208 Outdoor temperature thermistor Guard net R7209 ...

Page 203: ...808_B Outdoor Unit RK X S20 35G2V1B ARXS20 35G2V1B Removal Procedure 192 4 Remove the 4 screws on the right side panel 5 Remove the screw near the stop valves Step Procedure Points R7210 Right side panel R7211 ...

Page 204: ...B SiBE04 808_B 193 Removal Procedure 6 Unfasten the hook on the rear side When reassembling make sure to fit the hook 7 Lift up the right side panel and remove it When reassembling make sure to fit the hook Step Procedure Points R7212 R7213 Hook ...

Page 205: ...s before disassembling work Step Procedure Points 1 Disconnect the 2 connectors for the reactor Preparation Remove the panels and disconnect the connector for the fan motor according to the Removal of Outer Panels Fan Motor 2 Cut the clamps at 2 locations 3 Disconnect the connector for the compressor S30 When reassembling coil the excessive lead wire and hang the loop on the hook R9338 R9339 R9340...

Page 206: ...or the magnetic relay S50 and for the thermistors S90 5 Disconnect the connectors for the filter PCB S10 and for the overload protector S40 6 Disconnect the connectors for the electronic expansion valve coil S20 and for the four way valve coil S80 Step Procedure Points R9341 S90 S50 R9342 S40 S10 R9343 S80 S20 ...

Page 207: ...B ARXS20 35G2V1B Removal Procedure 196 7 Disconnect the connectors for the filter PCB HL3 HN3 8 Remove the wire harness for standby electricity saving 9 Cut the clamps at 2 locations Step Procedure Points R9344 HN3 HL3 R9345 Wire harness R9346 ...

Page 208: ...Outdoor Unit RK X S20 35G2V1B ARXS20 35G2V1B SiBE04 808_B 197 Removal Procedure 10 Lift and remove the electrical box Step Procedure Points R9348 Electrical box ...

Page 209: ...g off all power supplies before disassembling work Step Procedure Points 1 Release the discharge pipe thermistor Be careful not to lose the clip for the thermistor 2 Cut the clamp 3 Pull out the outdoor heat exchanger thermistor Be careful not to lose the clip for the thermistor R0267 Discharge pipe thermistor R12279 Clip R7221 R7222 Outdoor heat exchanger thermistor Clip ...

Page 210: ...Outdoor Unit RK X S20 35G2V1B ARXS20 35G2V1B SiBE04 808_B 199 Removal Procedure 4 Feature of the thermistors Step Procedure Points R9356 ...

Page 211: ...ng off all power supplies before disassembling work Step Procedure Points 1 Remove the main PCB You can remove the main PCB when you disconnect the lead wires on the terminal board without removing the electrical box 1 Feature of the main PCB 2 Remove the screw on the terminal board 3 Release the 2 earth terminals R9357 R7256 Terminal board R9358 Earth terminals ...

Page 212: ...it RK X S20 35G2V1B ARXS20 35G2V1B SiBE04 808_B 201 Removal Procedure 4 Remove the 4 screws 5 Unfasten the 3 hooks on the upper side 6 Lift and pull out the main PCB Step Procedure Points R9359 Screws R9360 R9361 ...

Page 213: ...ture of the main PCB Refer to page 22 for detail S10 HL3 HN3 filter PCB S20 electronic expansion valve coil S30 compressor S40 overload protector S50 magnetic relay S70 fan motor S80 four way valve coil S90 thermistors Step Procedure Points R12189 S10 S40 S90 S50 S70 S20 S80 HL3 HN3 S30 ...

Page 214: ...ng off all power supplies before disassembling work Step Procedure Points 1 Remove the reactor Preparation Remove the outer panels according to the Removal of Outer Panels Fan Motor Remove the electrical box according to the Removal of Electrical Box 1 Remove the screw and remove the reactor 2 Remove the partition plate 1 Remove the 2 screws R7224 Reactor R7225 R7226 Partition plate ...

Page 215: ...35G2V1B ARXS20 35G2V1B Removal Procedure 204 2 The partition plate has a hook on the lower side Lift and pull the partition plate to remove When reassembling fit the lower hook into the bottom frame Step Procedure Points R7227 R7228 Hook ...

Page 216: ...e string and open the sound blanket outer Preparation Remove the outer panels according to the Removal of Outer Panels Fan Motor Remove the electrical box according to the Removal of Electrical Box 2 Lift and remove the sound blanket outer Since the piping ports are torn easily remove the sound blanket carefully 3 Remove the sound blanket top 4 Pull the sound blanket inner out R7229 Sound blanket ...

Page 217: ...ure to wait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Pull out the electronic expansion valve coil 2 Remove the terminal cover 3 Disconnect the lead wires of the compressor R7233 Electronic expansion valve coil R7234 Terminal cover V W U R7235 Red U Yellow V Blue W ...

Page 218: ...by non oxidation brazing 2 It is required to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat Keep below 120 C For the sake of this wrap the four way valve with wet cloth and provide water so that the cloth does not dry In case of difficulty with gas brazing machine 1 Disconnect the brazed part where is easy to disconnect and rest...

Page 219: ...saw for cutting pipes by all means because the sawdust comes into the circuit When withdrawing the pipes be careful not to pinch them firmly with pliers The pipes may get deformed Provide a protective sheet or a steel plate so that the brazing flame cannot influence peripheries Step Procedure Points R7250 ...

Page 220: ...of global environment protection do not discharge the refrigerant gas in the atmosphere Make sure to collect all the refrigerant gas Cautions for restoration 1 Restore the piping by non oxidation brazing 2 It is required to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat Keep below 120 C For the sake of this wrap the four way val...

Page 221: ...e sawdust comes into the circuit When withdrawing the pipes be careful not to pinch them firmly with pliers The pipes may get deformed Provide a protective sheet or a steel plate so that the brazing flame cannot influence peripheries Be careful so as not to burn the compressor terminals the name plate the heat exchanger fin 4 Lift the compressor up and remove it Step Procedure Points R12032 Suctio...

Page 222: ...power supplies before disassembling work Step Procedure Points 1 Appearance features Take care not to cut your finger by the fins of the outdoor heat exchanger 2 Remove the panels The stop valve cover is united with the shield plate When reassembling make sure to fit the 5 hooks 1 Remove the screw of the stop valve cover Pull down the stop valve cover and remove it DAIKIN INVERTER R7186 R11890 Sto...

Page 223: ... the 2 screws and lift the top panel 3 Remove the drip proof plate 4 Remove the 4 screws and remove the discharge grille The discharge grille has 4 hooks Step Procedure Points DAIKIN INVERTER Top panel R7190 DAIKIN INVERTER R7191 Drip proof plate DAIKIN INVERTER R7192 Discharge grille R7193 ...

Page 224: ...20 35G3V1B SiBE04 808_B 213 Removal Procedure 5 Remove the 8 screws of the front panel 6 Unfasten the hooks Pull and remove the front panel The front panel has 4 hooks Step Procedure Points DAIKIN INVERTER R11825 Front panel R11826 Hooks ...

Page 225: ...inding Nut size M6 1 Remove the washer fitted nut of the outdoor fan 2 Remove the outdoor fan When reassembling align mark of the outdoor fan with D cut section of the motor shaft 3 Release the outdoor temperature thermistor Step Procedure Points R11827 Outdoor fan 10 mm R12236 R11828 D cut R11829 Outdoor temperature thermistor ...

Page 226: ...9 ARXS20 35G3V1B SiBE04 808_B 215 Removal Procedure 4 Cut the clamp 5 Disconnect the connector for the fan motor S70 6 Release the fan motor lead wire from the hook Step Procedure Points R11830 R11831 S70 R11832 Fan motor lead wire ...

Page 227: ... S20 35G2V1B9 ARXS20 35G3V1B Removal Procedure 216 7 Remove the screw and remove the fan motor fixing frame When reassembling fit the lower hooks into the bottom frame Step Procedure Points R11833 Fan motor fixing frame R12314 R7206 ...

Page 228: ... wire When reassembling put the fan motor lead wire through the back of the fan motor so as not to be entangled with the outdoor fan 9 Remove the 4 screws and remove the fan motor 4 Remove the right side panel 1 Remove the 2 screws on the rear side Step Procedure Points R11835 R3249 Lead wire Outdoor fan R12311 Fan motor R12162 ...

Page 229: ...G3V1B Removal Procedure 218 2 Remove the 4 screws on the right side panel 3 Remove the screw near the stop valves 4 Unfasten the hook on the rear side When reassembling make sure to fit the hook Step Procedure Points R12163 Right side panel R11839 R11842 ...

Page 230: ...B9 ARXS20 35G3V1B SiBE04 808_B 219 Removal Procedure 5 Lift up the right side panel and remove it When reassembling make sure to fit the hook 6 Lift up the guard net and remove it Step Procedure Points R12272 Hook R11841 Guard net ...

Page 231: ...ll power supplies before disassembling work Step Procedure Points 1 Disconnect the connector for the overload protector S40 Preparation Remove the panels and disconnect the connector for the fan motor according to the Removal of Outer Panels Fan Motor 2 Disconnect the connector for the four way valve coil S80 3 Disconnect the 2 connectors for the reactor R11846 S40 R11848 S80 R11844 ...

Page 232: ...onnector for the compressor 5 Disconnect the connector for the electronic expansion valve coil S20 6 Cut the clamp 7 Pull out the outdoor heat exchanger thermistor Be careful not to lose the clip for the thermistor Step Procedure Points R11845 R11847 S20 R11850 R11851 Outdoor heat exchanger thermistor Clip ...

Page 233: ...20 35G3V1B Removal Procedure 222 8 Release the discharge pipe thermistor Be careful not to lose the clip for the thermistor 9 Lift and remove the electrical box Step Procedure Points Discharge pipe thermistor R11849 R12279 Clip R11852 Electrical Box ...

Page 234: ...ng off all power supplies before disassembling work Step Procedure Points 1 Remove the main PCB You can remove the main PCB when you disconnect the lead wires on the terminal board without removing the electrical box 1 Feature of the main PCB 2 Remove the screw on the terminal board 3 Release the 2 earth terminals R11853 R11854 Terminal board R11855 Earth terminal ...

Page 235: ...orced operation button PCB Disconnect the connector S110 to remove the forced operation button PCB Be careful of a sharp protrusion at the back of the forced operation button PCB 5 Disconnect the relay connector 6 Cut the clamp Step Procedure Points Forced operation button PCB R11856 R11857 R11858 ...

Page 236: ... S20 35G2V1B9 ARXS20 35G3V1B SiBE04 808_B 225 Removal Procedure 7 Release the harness 8 Cut the clamps at the 2 locations 9 Disconnect the connector for the filter PCB S10 Step Procedure Points R11859 R11860 R11861 S10 ...

Page 237: ...nnectors for the magnetic relay S50 and for the forced operation button PCB S100 11 Disconnect the connector for the filter PCB HL3 HN3 12 Release the harnesses from the hook 13 Release the harness for the outdoor temperature thermistor Step Procedure Points R11862 S100 S50 HL3 HN3 R11863 R11864 R11865 ...

Page 238: ...ks and remove the main PCB Refer to page 24 for detail S10 HL3 HN3 filter PCB S20 electronic expansion valve coil S40 overload protector S50 magnetic relay S70 fan motor S80 four way valve coil S90 thermistors S100 forced operation button PCB Step Procedure Points R11866 R11867 R11868 S50 S100 S90 S10 HN3 HL3 S80 S20 S40 S70 ...

Page 239: ...t RK X S20 35G2V1B9 ARXS20 35G3V1B Removal Procedure 228 2 Remove the filter PCB 1 Release the harnesses from the hook 2 Cut the clamp 3 Release the harnesses from the hook Step Procedure Points R11869 Filter PCB R11871 R11872 ...

Page 240: ...B9 ARXS20 35G3V1B SiBE04 808_B 229 Removal Procedure 4 Release the harnesses from the hooks 5 Remove the screw 6 Unfasten the 2 hooks 7 Lift and pull out the filter PCB Step Procedure Points R11873 R11874 R11876 Filter PCB R11877 ...

Page 241: ...SiBE04 808_B Outdoor Unit RK X S20 35G2V1B9 ARXS20 35G3V1B Removal Procedure 230 8 Feature of the filter PCB Refer to page 24 for detail Step Procedure Points R11878 ...

Page 242: ...g off all power supplies before disassembling work Step Procedure Points 1 Remove the reactor Preparation Remove the outer panels according to the Removal of Outer Panels Fan Motor Remove the electrical box according to the Removal of Electrical Box 1 Remove the screw and remove the reactor 2 Remove the partition plate 1 Remove the 2 screws R11879 Reactor R11880 R12273 Partition plate ...

Page 243: ... 35G2V1B9 ARXS20 35G3V1B Removal Procedure 232 2 The partition plate has a hook on the lower side Lift and pull the partition plate to remove When reassembling fit the lower hook into the bottom frame Step Procedure Points R12280 R11883 ...

Page 244: ...es or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the sound blanket top Since the piping ports are torn easily remove the sound blanket carefully 2 Untie the string and open the sound blanket outer 3 Lift and remove the sound blanket outer R11884 Sound blanket top R11885 Sound blanket outer R11886 ...

Page 245: ...Outdoor Unit RK X S20 35G2V1B9 ARXS20 35G3V1B Removal Procedure 234 4 Pull the sound blanket inner out 5 Pull the sound blanket bottom out Step Procedure Points R11887 Sound blanket inner Sound blanket bottom R11888 ...

Page 246: ...e sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Pull out the electronic expansion valve coil 2 Remove the terminal cover 3 Disconnect the lead wires of the compressor R7233 Electronic expansion valve coil R7234 Terminal cover V W U R7235 Red U Yellow V Blue W ...

Page 247: ...by non oxidation brazing 2 It is required to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat Keep below 120 C For the sake of this wrap the four way valve with wet cloth and provide water so that the cloth does not dry In case of difficulty with gas brazing machine 1 Disconnect the brazed part where is easy to disconnect and rest...

Page 248: ...saw for cutting pipes by all means because the sawdust comes into the circuit When withdrawing the pipes be careful not to pinch them firmly with pliers The pipes may get deformed Provide a protective sheet or a steel plate so that the brazing flame cannot influence peripheries Step Procedure Points R7250 ...

Page 249: ...lobal environment protection do not discharge the refrigerant gas in the atmosphere Make sure to collect all the refrigerant gas Cautions for restoration 1 Restore the piping by non oxidation brazing 2 It is required to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat Keep below 120 C For the sake of this wrap the four way valve w...

Page 250: ...y all means because the sawdust comes into the circuit When withdrawing the pipes be careful not to pinch them firmly with pliers The pipes may get deformed Provide a protective sheet or a steel plate so that the brazing flame cannot influence peripheries Be careful so as not to burn the compressor terminals the name plate the heat exchanger fin 4 Lift the compressor up and remove it R12032 Suctio...

Page 251: ... Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Appearance features 2 Remove the panels 1 Remove the 2 screws to remove the top panel and 8 screws to remove the front panel The front panel has 4 hooks DAIKIN INVERTER R7186 R12281 R9363 Top panel Hooks Hooks Discharge grille Front panel ...

Page 252: ...nd remove the discharge grille When reassembling make sure to fit the 4 hooks 3 Remove the screw and remove the stop valve cover The stop valve cover is united with the shield plate When reassembling make sure to fit the 5 hooks Step Procedure Points R9364 R8139 Stop valve cover R12213 Shield plate ...

Page 253: ...onnecting wires When reassembling fasten the wires with screws on the terminal board 1 Remove the 3 screws to remove the wiring fixture Then remove the all screws to disconnect the power supply cables and the connecting wires 2 Remove the electrical box 1 Release the outdoor temperature thermistor 2 Lift up the guard net and remove it R12192 Wiring fixture Power supply cable Connecting wire Termin...

Page 254: ...ews and remove the right side panel 4 Remove the screw of the terminal board 5 Disconnect the connector for the fan motor S70 For removal procedure of the fan motor lead wire refer to Removal of Outdoor Fan Fan Motor Step Procedure Points R12217 Right side panel R12218 Terminal board R0254 S70 ...

Page 255: ... the connector for the overload protector S40 7 Disconnect the connector for the electronic expansion valve coil S20 8 Disconnect the connector for the four way valve coil S80 9 Disconnect the connector for the thermistors S90 Step Procedure Points R0255 S40 R0256 S20 R0257 S80 R0258 S90 ...

Page 256: ...r the compressor 11 Disconnect the 2 connectors for the reactor 12 Release the discharge pipe thermistor Be careful not to lose the clip for the thermistor 13 Detach the clamp for the thermistors from the electrical box Step Procedure Points R0259 R0260 R12197 Discharge pipe thermistor R12279 Clip R0262 R12196 ...

Page 257: ...SiBE04 808_B Outdoor Unit RK X S42G2V1B ARXS42G2V1B Removal Procedure 246 14 Remove the screw in front of the electrical box 15 Lift and remove the electrical box Step Procedure Points R0263 R0264 ...

Page 258: ... work Step Procedure Points 1 Remove the screw and remove the electrical box cover Preparation Remove the panels according to the Removal of Outer Panels Remove the electrical box according to the Removal of Electrical Box 2 Detach the insulation sheet The trimmed part goes front 3 Remove the 2 screws of the earth terminals R12274 Electrical box cover R8156 R8157 Insulation sheet Earth terminals R...

Page 259: ...ocedure 248 4 Release the earth wire from the hook 5 Remove the 2 screws and detach the 1 clip to remove the radiation shield plate 6 Cut off the 5 clamps and disconnect the wire harnesses Step Procedure Points R8159 R12198 Radiation shield plate Clip R8161 R8162 ...

Page 260: ... 7 Remove the 8 screws in total to remove the PCB 8 Lift up the back side slightly and unfasten the hooks of the front When reassembling make sure that the hooks of the electrical box are placed on the PCB 9 Lift up the PCB Step Procedure Points R8163 R8164 R8166 Hooks R8167 ...

Page 261: ...ure 250 10 Remove the PCB 11 Detach the terminals from the terminal board Refer to page 26 for detail S20 electronic expansion valve coil S40 overload protector S70 fan motor S80 four way valve coil S90 thermistors Step Procedure Points R8168 R8169 S70 S40 S90 S20 S80 ...

Page 262: ...Outdoor Unit RK X S42G2V1B ARXS42G2V1B SiBE04 808_B 251 Removal Procedure 12 Remove the screw of the radiation fin Step Procedure Points R12214 Radiation fin R8171 ...

Page 263: ...ter turning off all power supplies before disassembling work Step Procedure Points 1 Remove the partition plate When reassembling fit the lower hook into the bottom frame 1 Remove the 2 screws 2 The partition plate has hooks on the lower side Lift and pull the partition plate to remove R12282 Partition plate R8174 R8175 Remove the screw to remove the reactor ...

Page 264: ... the blanket carefully 1 Untie the string open the sound blanket outer and pull it out 2 Remove the sound blanket top upper 3 Remove the sound blanket top lower 4 Open the sound blanket inner and pull it out Step Procedure Points R12199 Sound blanket outer R8180 R12200 Sound blanket top upper R8178 Sound blanket top lower R12201 Sound blanket inner ...

Page 265: ...ies before disassembling work Step Procedure Points 1 Remove the outdoor fan The screw has reverse winding Nut size M6 1 Remove the washer fitted nut of the outdoor fan 2 Remove the outdoor fan When reassembling align mark of the outdoor fan with D cut section of the motor shaft 2 Remove the fan motor 1 Disconnect the connector for the fan motor S70 R8181 10 mm R12236 R8182 D cut R8183 R8184 S70 ...

Page 266: ... 808_B 255 Removal Procedure 2 The figure shows the arrangement of the fan motor lead wire 3 Remove the 1 screw of the fan motor fixing frame 4 Remove the fan motor fixing frame Step Procedure Points R8185 R12202 Fan motor fixing frame R8187 R8188 ...

Page 267: ...f the fan motor lead wire 6 Release the fan motor lead wire When reassembling put the fan motor lead wire through the back of the fan motor so as not to be entangled with the outdoor fan 7 Remove the 4 screws and 4 rubber vibration isolators to remove the fan motor Step Procedure Points R8189 R7627 Lead wire Outdoor fan R12215 R8190 R8191 ...

Page 268: ...rocedure Points 1 Release the discharge pipe thermistor Be careful not to lose the clip for the thermistor 2 Cut the clamp and pull out the outdoor heat exchanger thermistor 3 The thermistors for outdoor temperature discharge pipe outdoor heat exchanger are united as one assembly 4 The figure shows the arrangement of the thermistors R8192 Discharge pipe thermistor R12279 Clip R8193 Outdoor heat ex...

Page 269: ...all power supplies before disassembling work Step Procedure Points 1 Remove the peripheries Preparation Remove the sound blanket Detach the four way valve coil and the 2 clamps and then detach the wire harnesses 1 Remove the screw and remove the four way valve coil 2 Pull out the electronic expansion valve coil 3 Remove the putty 4 Remove the terminal cover R7703 R8203 R8204 R8205 R8195 Terminal c...

Page 270: ... refrigerant gas Cautions for restoration 1 Restore the piping by non oxidation brazing 2 It is required to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat Keep below 120 C For the sake of this wrap the four way valve with wet cloth and provide water so that the cloth does not dry In case of difficulty with gas brazing machine 1 ...

Page 271: ... for cutting pipes by all means because the sawdust comes into the circuit When withdrawing the pipes be careful not to pinch them firmly with pliers The pipes may get deformed Provide a protective sheet or a steel plate so that the brazing flame cannot influence peripheries Step Procedure Points R8209 ...

Page 272: ... 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the terminal cover 2 Disconnect the lead wires of the compressor 3 Unfasten the hooks with a flat screwdriver to remove the overload protector R8195 Terminal cover R8196 Red U Yellow V Blue W U W V R8197 U W V R8198 U W V ...

Page 273: ...it may happen that the refrigerant oil in the compressor catches fire prepare wet cloth so as to extinguish fire immediately Caution From the viewpoint of global environment protection do not discharge the refrigerant gas in the atmosphere Make sure to collect all the refrigerant gas Before working make sure that the refrigerant gas is empty in the circuit Be sure to apply nitrogen replacement whe...

Page 274: ...s not dry In case of difficulty with gas brazing machine 1 Disconnect the brazed part where is easy to disconnect and restore 2 Cut pipes on the main unit with a tube cutter in order to make it easy to disconnect Note Do not use a metal saw for cutting pipes by all means because the sawdust comes into the circuit When withdrawing the pipes be careful not to pinch them firmly with pliers The pipes ...

Page 275: ...nutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the panels Take care not to cut your finger by the fins of the outdoor heat exchanger 1 Remove the 4 screws and lift the top panel 2 Remove the 4 screws and remove the discharge grille Slide the discharge grille upwards and remove it Top panel R12283 R12315 Discharge grille R5245 ...

Page 276: ...ocedure The discharge grille has 4 hooks 3 Remove the 6 screws of the front panel 4 Push the front panel and lift the shield plate to unfasten the hooks Step Procedure Points Front panel R12284 Shield plate R5248 1 Push the front panel 2 Lift the shield plate upwards ...

Page 277: ...fasten the left side hooks and then the right side hook Remove the front panel Lift the front panel while pushing the left side panel inwards Lift the front panel and unfasten the right side hook When reassembling fit the right side of the front panel first Step Procedure Points ...

Page 278: ..._B 267 Removal Procedure 2 Remove the stop valve cover 1 Remove the screw of the stop valve cover 2 Pull down the stop valve cover to unfasten the hooks and remove it The stop valve cover has 6 hooks Step Procedure Points Stop valve cover R5252 R5254 ...

Page 279: ...ork Step Procedure Points 1 Remove the electrical box cover Preparation Remove the top panel and the front panel according to the Removal of Outer Panels This procedure is not necessary to remove the outdoor fan only 1 Remove the screw of the shield plate 2 Unfasten the 2 hooks and remove the shield plate 3 Unfasten the 4 hooks of the electrical box cover and remove it R5255 Shield plate Hook R120...

Page 280: ...XS50G2V1B SiBE04 808_B 269 Removal Procedure 2 Remove the fan motor 1 Disconnect the connector for the fan motor S70 2 Release the fan motor lead wire from the 7 hooks Step Procedure Points R5258 S70 R5259 Fan motor lead wire R5260 ...

Page 281: ...the outdoor fan with D cut section of the motor shaft 4 Remove the lower 2 screws from the fan motor first Be sure to remove the lower screws first If the upper screws are removed first the fan motor the center of gravity of which is toward the front may tilt down or fall getting you injured 5 Then remove the upper 2 screws Step Procedure Points R5262 Outdoor fan 10 mm R12236 R5263 R5264 Fan motor...

Page 282: ...l Procedure 6 Release the fan motor lead wire from the 2 hooks and pull the fan motor out When reassembling put the fan motor lead wire through the back of the fan motor so as not to be entangled with the outdoor fan Step Procedure Points R5265 Fan motor lead wire ...

Page 283: ...ies before disassembling work Step Procedure Points 1 Remove the 2 screws of the shield plate Preparation Remove the top panel and the front panel according to the Removal of Outer Panels 2 Slide the shield plate upward to unfasten the 1 hook on the bottom left and then remove the shield plate 3 Disconnect the 2 power supply cables and the 1 earth wire R5266 Shield plate R5267 R5268 Earth wire ...

Page 284: ... ARXS50G2V1B SiBE04 808_B 273 Removal Procedure 4 Disconnect the 2 earth wires 5 Remove the 3 screws of the right side panel 6 Remove the screw of the electrical box Step Procedure Points Earth wires R5269 R5270 Right side panel ...

Page 285: ...mbling insert the 2 hooks of the lower part and the 1 hook of the upper back 8 Disconnect the connectors of the front side S20 electronic expansion valve coil S40 overload protector S80 four way valve coil S90 thermistors 9 Disconnect the relay connector for the compressor Step Procedure Points R5272 Hook R5273 Hooks R5275 S40 S20 S90 S80 ...

Page 286: ... Procedure 10 Release the clamp of the compressor relay harness with pliers 11 Detach the clamp and release the thermistor lead wires from the hook 12 Remove the screw Step Procedure Points R5277 Compressor relay harness R5278 Thermistor lead wire Hook Clamp R12316 ...

Page 287: ...oor Unit RK X S50G2V1B ARXS50G2V1B Removal Procedure 276 13 Release the harness of the outdoor temperature thermistor from the hook 14 Lift and remove the electrical box Step Procedure Points R9403 R5279 Electrical box ...

Page 288: ...supplies before disassembling work Step Procedure Points 1 Disconnect the connectors from the service monitor PCB S52 S102 Preparation Remove the electrical box according to the Removal of Electrical Box 2 Detach the 4 clamps with pliers 3 Remove the screws of the terminal board and the earth wire R5280 Service monitor PCB S52 S102 Clamps R5281 R12285 Terminal board Earth wire ...

Page 289: ...dure 278 4 Unfasten the hook on the right 5 Open the terminal board 6 Disconnect the harnesses 1 Black 2 White 3 Red L1 Black L2 Brown N1 White N2 Blue 7 Disconnect the 2 connectors for the reactor HR1 HR2 Step Procedure Points R5285 N2 N1 L1 3 2 1 L2 R11473 HR2 HR1 ...

Page 290: ...S50G2V1B SiBE04 808_B 279 Removal Procedure 8 Remove the 3 screws of the main PCB 9 Unfasten the 4 hooks 10 Lift up and remove the main PCB Refer to page 28 for detail Step Procedure Points Main PCB R5287 R5288 Hooks Main PCB R5289 ...

Page 291: ...10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the sound blanket back 2 Remove the sound blanket outer Since the piping ports are torn easily remove the sound blanket carefully 3 Remove the sound blanket top upper Sound blanket back R5293 Sound blanket outer R5294 Sound blanket top upper ...

Page 292: ...et inner 6 Release the discharge pipe thermistor Be careful not to lose the clip for the thermistor 7 Cut the clamp and pull out the outdoor heat exchanger thermistor Step Procedure Points Sound blanket top lower R11398 Sound blanket inner R5296 R12286 Discharge pipe thermistor R12287 Clip Outdoor heat exchanger thermistor R5292 Clamp ...

Page 293: ...or restoration 1 Restore the piping by non oxidation brazing 2 It is required to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat Keep below 120 C For the sake of this wrap the four way valve with wet cloth and provide water so that the cloth does not dry Note Do not use a metal saw for cutting pipes by all means because the sawdu...

Page 294: ...ated by the gas brazing machine Warning If the refrigerant gas leaks during work ventilate the room If the refrigerant gas is exposed to flames toxic gas may be generated Caution From the viewpoint of global environment protection do not discharge the refrigerant gas in the atmosphere Make sure to collect all the refrigerant gas Before working make sure that the refrigerant gas is empty in the cir...

Page 295: ...val of Compressor Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the terminal cover 2 Disconnect the lead wires of the compressor Terminal cover R5302 R12204 Yellow V Red U Blue W ...

Page 296: ... gas is exposed to flames toxic gas may be generated Warning Since it may happen that the refrigerant oil in the compressor catches fire prepare wet cloth so as to extinguish fire immediately Caution From the viewpoint of global environment protection do not discharge the refrigerant gas in the atmosphere Make sure to collect all the refrigerant gas Before working make sure that the refrigerant ga...

Page 297: ...part where is easy to disconnect and restore 2 Cut pipes on the main unit with a tube cutter in order to make it easy to disconnect Note Do not use a metal saw for cutting pipes by all means because the sawdust comes into the circuit When withdrawing the pipes be careful not to pinch them firmly with pliers The pipes may get deformed Provide a protective sheet or a steel plate so that the brazing ...

Page 298: ...Mode 289 3 Trial Operation 291 4 Field Settings 293 4 1 Model Type Setting 293 4 2 When 2 Units are Installed in 1 Room 293 4 3 Standby Electricity Saving 294 4 4 Facility Setting Jumper and Switch cooling at low outdoor temperature 295 4 5 Jumper and Switch Settings 296 5 Application of Silicon Grease to a Power Transistor and a Diode Bridge 297 ...

Page 299: ...t Detail 1 Remove the valve caps from the liquid stop valve and the gas stop valve 2 Carry out forced cooling operation 3 After 5 to 10 minutes close the liquid stop valve with a hexagonal wrench 4 After 2 to 3 minutes close the gas stop valve and stop the forced cooling operation Refer to page 289 for forced cooling operation Gas stop valve Valve cap Close Liquid stop valve Service port R13628 He...

Page 300: ... cooling operation ON OFF button SW1 on the outdoor unit Command frequency RK X S20 35G2V1B ARXS20 35G2V1B 68 Hz RK X S20 35G2V1B9 ARXS20 35G3V1B 58 Hz RK X S42G2V1B ARXS42G2V1B 47 Hz RK X S50G2V1B ARXS50G2V1B 66 Hz End 1 The operation ends automatically after 15 minutes 2 Press the forced cooling operation ON OFF button SW1 on the indoor unit again 3 Press the ON OFF button on the remote controll...

Page 301: ... 35G2V1B9 ARXS20 25 35G3V1B Outdoor Unit RK X S50G2V1B ARXS50G2V1B Note 42 class models have no forced operation ON OFF button on the outdoor unit PCB Carry out forced cooling operation from indoor unit 1 2 3 Push here Screwdriver R13824 LED A SW4 ON A B CD S102 SW1 S2 R14176 Forced operation ON OFF switch ...

Page 302: ...tem then restarts operation with the previous mode when the circuit breaker is restored In cooling mode select the lowest programmable temperature in heating mode select the highest programmable temperature Trial operation may be disabled in either mode depending on the room temperature After trial operation is complete set the temperature to a normal level 26 C to 28 C in cooling mode 20 C to 24 ...

Page 303: ... the TEMP button and the MODE button at the same time 3 Press the MODE button twice T appears on the display to indicate that trial operation is selected 4 Press the MODE button and select operation mode 5 Trial operation terminates in approx 30 minutes and switches into normal mode To quit a trial operation press the ON OFF button 2 1 5 3 2 3 4 R9663 ...

Page 304: ...mp model Set the DIP switch to H P Cooling only model Set the DIP switch to C O 4 2 When 2 Units are Installed in 1 Room When 2 indoor units are installed in 1 room 1 of the 2 pairs of indoor unit and wireless remote controller can be set for different address Both the indoor unit PCB and the wireless remote controller need alteration Indoor Unit PCB 1 Remove the front grille 2 screws 2 Remove the...

Page 305: ...procedure is required for turning ON the function 1 Check that the main power supply is turned OFF Turn OFF if it has not been turned OFF 2 Remove the stop valve cover 3 Disconnect the selective connector for standby electricity saving 4 Turn ON the main power supply Caution Before connecting or disconnecting the selective connector for standby electricity saving make sure that the main power supp...

Page 306: ...utting jumper or turning on switch on the outdoor unit PCB If the outdoor temperature falls to 20 C or lower the operation stops If the outdoor temperature rises the operation starts again RKS20 35G2V1B RKS20 35G2V1B9 RKS42G2V1B 1 2 3 S90 PCB S50 S20 S10 S1 J4 J8 J9 Cut the jumper J8 R12206 1 2 3 S70 S40 S2 S90 J5 J4 J3 R12187 Cut the jumper J4 Top panel Notch PCB J3 J4 J5 PCB Hook Fan motor lead ...

Page 307: ...ing pages Indoor unit page 19 Outdoor unit page 22 24 26 For the location of the switch refer to page 28 LED A SW4 ON A B CD S102 SW1 S2 R12186 Turn on the switch SW4 B Jumper Function When connected factory set When cut JB on indoor unit PCB Fan speed setting when compressor stops for thermostat OFF effective only at cooling operation Fan speed setting Remote controller setting Fan rpm is set to ...

Page 308: ...or encouraging the heat radiation of the power transistor and the diode bridge Applying the paste should be implemented in accordance with the following instruction Remark There is the possibility of failure with smoke in case of bad heat radiation Wipe off the old silicon grease completely on a radiation fin Apply the silicon grease evenly to the whole Do not leave any foreign object such as sold...

Page 309: ...SiBE04 808_B Appendix 298 Part 9 Appendix 1 Piping Diagrams 299 1 1 Indoor Unit 299 1 2 Outdoor Unit 300 2 Wiring Diagrams 304 2 1 Indoor Unit 304 2 2 Outdoor Unit 304 ...

Page 310: ...SS FLOW FAN 9 5CuT REFRIGERANT FLOW FIELD PIPING 9 5CuT 6 4CuT FIELD PIPING M COOLING INDOOR UNIT FAN MOTOR HEAT EXCHANGER 6 4CuT HEATING THERMISTOR ON HEAT EXCH 4D058897C CROSS FLOW FAN COOLING 9 5CuT 6 4CuT M INDOOR UNIT 6 4CuT REFRIGERANT FLOW HEATING FAN MOTOR FIELD PIPING HEAT EXCHANGER FIELD PIPING 12 7CuT THERMISTOR ON HEAT EXCH 4D058898C ...

Page 311: ...ILTER MUFFLER WITH FILTER MUFFLER WITH FILTER MOTOR OPERATED VALVE LIQUID STOP VALVE GAS STOP VALVE FOURWAY VALVE NORMALLY OFF DISCHARGE PIPE THERMISTOR 3D059588A 9 5CuT MUFFLER COMPRESSOR 7 0CuT 9 5CuT 9 5CuT HEAT EXCHANGER REFRIGERANT FLOW 4 8CuT 6 4CuT 9 5CuT PROPELLER FAN M FIELD PIPING ACCUMULATOR 9 5CuT 6 4CuT 7 9CuT 6 4CuT 6 4CuT FIELD PIPING MUFFLER 7 0CuT 4 8CuT OUTDOOR UNIT COOLING MUFFL...

Page 312: ...VE FOURWAY VALVE NORMALLY OFF DISCHARGE PIPE THERMISTOR 3D059591 OUTDOOR UNIT 12 7CuT 12 7CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT PROPELLER FAN MUFFLER HEAT EXCHANGER 7 9CuT 7 9CuT M COMPRESSOR 12 7CuT 12 7CuT 7 9CuT 7 9CuT 4 0CuT 4 0CuT CAPILLARY TUBE 4 CAPILLARY TUBE 2 CAPILLARY TUBE 3 CAPILLARY TUBE 1 12 7CuT MUFFLER 12 7CuT 6 4CuT 12 7CuT 6 4CuT 6 4CuT 6 4CuT FIELD PIPING R...

Page 313: ...TOR MUFFLER WITH FILTER MUFFLER WITH FILTER MUFFLER WITH FILTER MOTOR OPERATED VALVE LIQUID STOP VALVE GAS STOP VALVE FOUR WAY VALVE ON HEATING DISCHARGE PIPE THERMISTOR 3D059587A 7 9CuT 9 5CuT 7 9CuT 7 0CuT M HEAT EXCHANGER MUFFLER 6 4CuT FIELD PIPING 9 5CuT HEATING 6 4CuT FIELD PIPING 9 5CuT 6 4CuT MUFFLER 9 5CuT REFRIGERANT FLOW 7 0CuT COOLING φ 4 0 ID 2 0CuT 4 8CuT PROPELLER FAN COMPRESSOR OUT...

Page 314: ...P VALVE FOUR WAY VALVE ON HEATING DISCHARGE PIPE THERMISTOR 3D059590A OUTDOOR UNIT 12 7CuT 12 7CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT PROPELLER FAN MUFFLER HEAT EXCHANGER 7 9CuT 7 9CuT M COMPRESSOR 12 7CuT 12 7CuT 7 9CuT 7 9CuT 4 0CuT 4 0CuT CAPILLARY TUBE 4 CAPILLARY TUBE 2 CAPILLARY TUBE 3 CAPILLARY TUBE 1 9 5CuT MUFFLER 9 5CuT 6 4CuT 12 7CuT 6 4CuT 6 4CuT 6 4CuT 6 4CuT FILT...

Page 315: ...A HR2 HL1 L1 BLK ORG 1 L 1 MRM10 HN1 WHT V2 2 HN3 N 2 DB2 HN2 C5 S BLU RED 3 3 FU2 C118 3 15A V3 HL3 HL2 C6 GRY L FU1 MR30 9 WHT 1 3 15A N BLK W V U GRN YLW V1 BLK SA1 PCB2 BLK E1 S11 S10 BLK BLK BLK BLK 9 1 GRN BLK YLW PCB1 E2 2 S30 MR30_A MR30_B MRCW 1 3 S50 S70 Z2C 1 S90 S20 S40 BLK S80 7 4 2 3 1 1 6 3 1 1 1 2 6 N 2 BLK BRN BRN 4 1 BLU RED YLW outdoor BLU BLK BLK BLK BLK BLK BLK BLU RED BRN RED...

Page 316: ... FAN MOTOR MAGNETIC RELAY NEUTRAL OVERLOAD PROTECTOR SA1 PRINTED CIRCUIT BOARD CONNECTOR THERMISTOR SURGE ARRESTER FORCED OPERATION SWITCH VARISTOR TERMINAL STRIP ELECTRONIC EXPANSION VALVE COIL REVERSING SOLENOID VALVE COIL FERRITE CORE PROTECTIVE EARTH IN CASE OF COOLING ONLY TYPE 3D065704A 1 U YLW M1C Z2C BLK WHT N S E WHT V1 Z4C N 3 RED GRN YLW BLK Q31 3 S40 R1T 2 C94 W BLK FU2 3 15A 3 RED HL1...

Page 317: ... BLK BLACK BLU BLUE BRN BROWN GRN GREEN ORG ORANGE RED RED WHT WHITE YLW YELLOW _ _ _ _ _ _ _ _ t t t POWER SUPPLY 3D059601 outdoor FIELD WIRING indoor S2 BLU BRN FU3 1 3 15A 1 WHT TO INDOOR UNIT BLU 8 POWER SUPPLY YLW BLK BRN BRN FU1 MRM10 S10 1 3 BLU 5 BLU V6 SHEETMETAL 7 V3 YLW RED S40 AC1 BLK Z3C MRM10 MRM20 MRC W MAGNETIC RELAY R1T R3T THERMISTOR S2 S102 CONNECTOR LEDA PILOT LAMP GRN BLU 6 P ...

Page 318: ...2M PCB1 V5 S80 WHT RED BRN M BLU BLK WHT FU1 S70 S52 R2T 1 GRN WHT 3 WHT W BLU W L1R V11 3 RED BLU BLK 1 4 BLK GRN 2 2 5 1 S51 Z1C BLK 7 Y1E MRM10 MRM20 MRC W MAGNETIC RELAY R1T R3T THERMISTOR S2 S102 CONNECTOR LEDA PILOT LAMP M1C COMPRESSOR MOTOR M1F FAN MOTOR L1R REACTOR Q1L OVERLOAD PROTECTOR PM1 POWER MODULE PCB1 2 PRINTED CIRCUIT BOARD SHEET METAL L LIVE N NEUTRAL SW1 FORCED OPERATION ON OFF ...

Page 319: ...l carefully before using this product The User s Manual provides important safety instructions and warnings Be sure to follow these instructions and warnings If you have any enquiries please contact your local importer distributor and or retailer Cautions on product corrosion 1 Air conditioners should not be installed in areas where corrosive gases such as acid gas or alkaline gas are produced 2 I...

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