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Daikin Super Multi NX FTXS20G2V1B, Service Manual

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Daikin Super Multi NX FTXS20G2V1B Service Manual Download Page 183

Indoor Unit

SiENBE04-808_A

171

Removal Procedure

6. Remove the display PCB.

„

The display PCB is 
positioned on the rear side 
of the signal receiver unit.

1

The figure 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

SiENBE04-808_A.pdf   183

21/02/2011   13:20:06

Summary of Contents for Super Multi NX FTXS20G2V1B

Page 1: ...SiENBE04 808_A Service Manual Inverter Pair Wall Mounted Type G Series Applied Models z Inverter Pair Cooling only z Inverter Pair Heat Pump...

Page 2: ...SiENBE04 808_A Service Manual Inverter Pair Wall Mounted Type G Series Applied Models z Inverter Pair Cooling only z Inverter Pair Heat Pump...

Page 3: ...2V1B RKS25G2V1B9 RKS35G2V1B RKS35G2V1B9 RKS42G2V1B RKS50G2V1B zHeat Pump Indoor Units FTXS20G2V1B ATXS20G2V1B FTXS25G2V1B ATXS25G2V1B FTXS35G2V1B ATXS35G2V1B FTXS42G2V1B ATXS42G2V1B FTXS50G2V1B ATXS50...

Page 4: ...m 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 Inve...

Page 5: ...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...

Page 6: ...l of Electrical Box 192 2 3 Removal of Thermistors 196 2 4 Removal of PCB 198 2 5 Removal of Reactor Partition Plate 201 2 6 Removal of Sound Blanket 203 2 7 Removal of Four Way Valve 204 2 8 Removal...

Page 7: ...286 1 Trial Operation 287 2 Field Settings 289 2 1 Model Type Setting 289 2 2 When 2 Units are Installed in 1 Room 289 2 3 Standby Electricity Saving 290 2 4 Facility Setting Jumper and Switch cooling...

Page 8: ...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 su...

Page 9: ...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...

Page 10: ...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...

Page 11: ...ent 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 o...

Page 12: ...e 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 C...

Page 13: ...SiENBE04 808_A 1 List of Functions Part 1 List of Functions 1 Functions 2 1 1 Cooling Only 2 1 2 Heat Pump 3...

Page 14: ...ter 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 U...

Page 15: ...y 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...

Page 16: ...o 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...

Page 17: ...SiENBE04 808_A 5 Specifications Part 2 Specifications 1 Specifications 6 1 1 Cooling Only 6 1 2 Heat Pump 9...

Page 18: ...le 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 2...

Page 19: ...emovable 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...

Page 20: ...ble 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...

Page 21: ...ir 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 2...

Page 22: ...ter 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 1...

Page 23: ...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...

Page 24: ...movable 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 3...

Page 25: ...er 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...

Page 26: ...ter 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 1...

Page 27: ...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...

Page 28: ...movable 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 3...

Page 29: ...E04 808_A 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 Uni...

Page 30: ...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 289 for detail JB Fan speed...

Page 31: ...d Circuit Board Connector Wiring Diagram SiENBE04 808_A 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 2P20...

Page 32: ...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 L...

Page 33: ...3 Varistor 1 S10 Connector 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...

Page 34: ...ing 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 S9...

Page 35: ...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 f...

Page 36: ...rd Connector Wiring Diagram 24 PCB Detail PCB 1 Filter PCB PCB 2 Main PCB PCB 3 Forced Operation Button PCB HR1 HL2 3P254234 1 FU1 HN2 S FU3 AC2 E1 E2 AC1 S11 V3 V2 S50 on main PCB S10 J5 J4 S90 FU2 S...

Page 37: ...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...

Page 38: ...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 2P20...

Page 39: ...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 E...

Page 40: ...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...

Page 41: ...eration 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 Changi...

Page 42: ...ted 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 inver...

Page 43: ...ce the set temperature is reached the energy saving operation enables to maintain the room temperature at low power Frequency Limits The following functions regulate the minimum and maximum frequency...

Page 44: ...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 e...

Page 45: ...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 t...

Page 46: ...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 a...

Page 47: ...ion 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...

Page 48: ...eturns 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 tempe...

Page 49: ...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...

Page 50: ...NO button When this function is activated the maximum capacity also decreases The remote control can send the ECONO command when the unit is in COOL HEAT DRY or AUTO operation This function can only b...

Page 51: ...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 se...

Page 52: ...ift 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 righ...

Page 53: ...s 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 targ...

Page 54: ...0 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 rp...

Page 55: ...s while the unit is not operating Refer to Forced operation mode on page 60 for detail Note When the ON OFF button is pressed for 10 seconds or more the forced operation is stopped 1 12 4 Titanium Apa...

Page 56: ...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 d...

Page 57: ...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 Op...

Page 58: ...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...

Page 59: ...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 accordi...

Page 60: ...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...

Page 61: ...sor 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...

Page 62: ...m going up further 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...

Page 63: ...compressor 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...

Page 64: ...ng 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...

Page 65: ...mines the 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 1...

Page 66: ...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 o...

Page 67: ...tes for 6 minutes More than 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...

Page 68: ...trol 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 elect...

Page 69: ...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 1...

Page 70: ...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 Disch...

Page 71: ...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 t...

Page 72: ...not in the 3 minute standby mode 2 The outdoor unit is not operating The forced operation is allowed when the above both conditions are met Start 1 Press the forced operation ON OFF button SW1 on the...

Page 73: ...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 control 8...

Page 74: ...lever method of using it In order to meet this expectation of the users giving sufficient explanations taking enough time can be said to reduce about 80 of the requests for servicing However good the...

Page 75: ...tton once to start operation Press once again to stop it 6 TEMPERATURE adjustment buttons It changes the temperature setting 7 MODE selector button It selects the operation mode AUTO DRY COOL HEAT FAN...

Page 76: ...n mode Each pressing of the button advances the mode setting in sequence AUTO DRY COOL HEAT FAN Cooling only model Heat pump model 2 Press ON OFF button The OPERATION lamp lights up To stop operation...

Page 77: ...pacity In that case the system switches into defrosting operation to take away the frost During defrosting operation hot air does not flow out of indoor unit A pinging sound may be heard during defros...

Page 78: ...is displayed on the LCD and the flaps will begin to swing 2 When the flaps have reached the desired position press SWING button once more The flaps will stop moving disappears from the LCD To adjust...

Page 79: ...imensional 3 D Airflow 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 pr...

Page 80: ...h time the COMFORT SENSOR button is pressed a different setting option is displayed on the LCD To cancel operation 2 Press COMFORT SENSOR button Press the button to select Blank 1 2 Blank Display Oper...

Page 81: ...he flaps will move upward while cooling so that the airflow will be directed upward The flaps will move downward while heating so that the airflow will be directed downward Cooling operation Heating o...

Page 82: ...NT EYE functions simultaneously When both of them are in use the air conditioner will not direct the airflow towards the people Sensor may not detect moving objects further than 5m away Check the appl...

Page 83: ...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 runni...

Page 84: ...ayed on the LCD To cancel OUTDOOR UNIT QUIET operation 2 Press QUIET button again disappears from the LCD Notes on OUTDOOR UNIT QUIET operation This function is available in COOL HEAT and AUTO modes T...

Page 85: ...in ECONO mode vary with the connecting outdoor unit Notes on ECONO operation ECONO Operation can only be set when the unit is running Pressing the OFF button causes the setting to be canceled and the...

Page 86: ...e setting by 10 minutes Holding down either button changes the setting rapidly 3 Press OFF TIMER button again The TIMER lamp lights up To cancel the OFF TIMER operation 4 Press CANCEL button The TIMER...

Page 87: ...the time setting by 10 minutes Holding down either button changes the setting rapidly 3 Press ON TIMER button again The TIMER lamp lights up To cancel the ON TIMER operation Press CANCEL button The ti...

Page 88: ...mple makes it possible to schedule operating mode and set temperature changes Furthermore by using OFF OFF OFF OFF settings only the turn OFF time of each day can be set This will turn OFF the air con...

Page 89: ...n to select the desired mode Pressing the SELECT button changes ON or OFF setting in sequence In case the reservation has already been set selecting blank deletes the reservation Go to STEP 9 if blank...

Page 90: ...f the week Refer to Copy mode Notes on WEEKLY TIMER operation Do not forget to set the clock on the remote control first The day of the week ON OFF TIMER mode time and set temperature only for ON TIME...

Page 91: ...f the week will be copied To continue copying the settings to other days of the week repeat STEP 4 and STEP 5 6 Press button to complete the setting is displayed on the LCD and WEEKLY TIMER operation...

Page 92: ...goes off To reactivate the WEEKLY TIMER operation press the WEEKLY button again If a reservation deactivated with WEEKLY button is activated once again the last reservation mode will be used To delet...

Page 93: ...hanges the temperature setting 6 ON OFF button Press this button once to start operation Press once again to stop it 7 MODE selector button It selects the operation mode AUTO DRY COOL HEAT FAN 8 QUIET...

Page 94: ...select a operation mode Each pressing of the button advances the mode setting in sequence AUTO DRY COOL HEAT FAN 2 Press ON OFF button The OPERATION lamp lights up To stop operation 3 Press ON OFF bu...

Page 95: ...apacity In that case the system switches into defrosting operation to take away the frost During defrosting operation hot air does not flow out of indoor unit A pinging sound may be heard during defro...

Page 96: ...is displayed on the LCD and the flaps will begin to swing 2 When the flaps have reached the desired position press SWING button once more The flaps will stop moving disappears from the LCD To adjust t...

Page 97: ...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 ATTENTION Always use a r...

Page 98: ...IGENT EYE operation To cancel COMFORT AIRFLOW operation 2 Press COMFORT SENSOR button Press the button to select Blank Note on the angles of the flaps The flap position will change preventing air from...

Page 99: ...oner will be in COMFORT AIRFLOW operation combined with INTELLIGENT EYE operation To cancel the INTELLIGENT EYE operation 2 Press COMFORT SENSOR button Press the button to select Blank 1 2 Blank EX So...

Page 100: ...operatipon will not go on during powerful operation NIGHT SET MODE will not go on during use of INTELLIGENT EYE operation 1 Press COMFORT SENSOR button and select on the LCD Each time the COMFORT SEN...

Page 101: ...AIRFLOW operation 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...

Page 102: ...ed on the LCD To cancel OUTDOOR UNIT QUIET operation 2 Press QUIET button again disappears from the LCD Note on OUTDOOR UNIT QUIET operation This function is available in COOL HEAT and AUTO modes This...

Page 103: ...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 function which enables efficient operation by l...

Page 104: ...reases the time setting by 10 minutes Holding down either button changes the setting rapidly 3 Press OFF TIMER button again The TIMER lamp lights up To cancel the OFF TIMER operation 4 Press CANCEL bu...

Page 105: ...he time setting by 10 minutes Holding down either button changes the setting rapidly 3 Press ON TIMER button again The TIMER lamp lights up To cancel the ON TIMER operation 4 Press CANCEL button The t...

Page 106: ...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 Disc...

Page 107: ...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 th...

Page 108: ...ating 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 control indication 10...

Page 109: ...sequence 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 re...

Page 110: ...the figure until you hear the sound of beep or pi pi 3 Diagnose by the sound H pi The figure of the ten s place does not accord with the error code H pi pi The figure of the ten s place accords with t...

Page 111: ...p The 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 Refe...

Page 112: ...own 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 control...

Page 113: ...nd change the figure until you hear the sound of beep or pi pi 3 Diagnose by the sound H pi The figure of the ten s place does not accord with the error code H pi pi The figure of the ten s place acco...

Page 114: ...ep The 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 Ref...

Page 115: ...lity 109 Outdoor Unit E1 Outdoor unit PCB abnormality 112 E5H OL activation compressor overload 114 E6H Compressor lock 115 E7 DC fan lock 116 E8 Input overcurrent detection 117 EA Four way valve abno...

Page 116: ...on 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 r...

Page 117: ...ing 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 Free...

Page 118: ...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 accumu...

Page 119: ...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 m...

Page 120: ...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 Tur...

Page 121: ...mpressor 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 temp...

Page 122: ...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 distu...

Page 123: ...iring 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 numb...

Page 124: ...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...

Page 125: ...y 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 th...

Page 126: ...tive 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...

Page 127: ...un for about 5 minutes without any other error Supposed Causes Compressor locked Compressor harness disconnected Troubleshooting Turn off the power Disconnect the harnesses U V and W R8399 Caution NO...

Page 128: ...her 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 152 R11708 Caution YES Y...

Page 129: ...e 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...

Page 130: ...ditions 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...

Page 131: ...nect in position Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged R11710 Refrigerant shortage Water mixed Stop valve Four way valve co...

Page 132: ...peats 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 thermisto...

Page 133: ...e thermistor Refrigerant shortage Four way valve Water mixed Stop valve Check No 06 Check the thermistors Check No 11 Check the refrigerant line Check No 04 Check the electronic expansion valve Replac...

Page 134: ...Conditions The temperature sensed by the outdoor heat exchanger thermistor rises above C The error is cleared when the temperature drops below C Supposed Causes The installation space is not large en...

Page 135: ...Reconnect the connector or fan motor lead wires Change the installation location or direction Clean the outdoor heat exchanger Replace the electronic expansion valve or the coil Replace the outdoor un...

Page 136: ...or 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 su...

Page 137: ...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 P...

Page 138: ...ng 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...

Page 139: ...1380 NO NO NO YES YES NO YES YES Check No 29 Check the short circuit of the diode bridge Check with the inverter checker Turn off the power Disconnect the harnesses U V and W Turn on the power Check t...

Page 140: ...rect the power supply Voltage as rated R11471 NO NO YES NO YES YES Check with the inverter checker Turn off the power Disconnect the harnesses U V and W Turn on the power Check the electrolytic capaci...

Page 141: ...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...

Page 142: ...ing 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...

Page 143: ...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 Replac...

Page 144: ...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...

Page 145: ...e following thermistors Cooling Outdoor heat exchanger temperature Heating Indoor heat exchanger temperature Replace the indoor heat exchanger thermistor Replace the outdoor unit PCB Replace the indoo...

Page 146: ...emperature is above C The error is cleared when the radiation fin temperature drops below C To cool the electrical components the outdoor fan starts when the radiation fin temperature rises above C an...

Page 147: ...in temperature Check No 07 Check the installation condition Radiation fin dirty Above C Check No 09 Check the outdoor fan or related Error again or outdoor fan activated Replace the outdoor unit PCB C...

Page 148: ...leared when the radiation fin temperature drops below C If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Defecti...

Page 149: ...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 f...

Page 150: ...hile 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...

Page 151: ...ck No 07 Check the installation condition 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 aga...

Page 152: ...nds to rise Refrigerant shortage detection III Refrigerant shortage is detected by checking the difference between suction and discharge temperature Malfunction Decision Conditions Refrigerant shortag...

Page 153: ...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...

Page 154: ...e pipe flare or replace the union 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 Complet...

Page 155: ...oltage 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...

Page 156: ...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...

Page 157: ...hen 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 Troublesh...

Page 158: ...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 teste...

Page 159: ...e 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...

Page 160: ...temperature 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...

Page 161: ...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 dir...

Page 162: ...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 syst...

Page 163: ...r 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...

Page 164: ...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 Rep...

Page 165: ...esistance between the pins of the DB1 as below If the resistance is or less than 1 k short circuit occurs on the main circuit 20 25 35 class 42 class terminal of the tester in case of digital terminal...

Page 166: ...0 35G2V1B9 ARXS20 35G3V1B 209 3 1 Removal of Outer Panels Fan Motor 209 3 2 Removal of Electrical Box 218 3 3 Removal of PCB 221 3 4 Removal of Reactor Partition Plate 229 3 5 Removal of Sound Blanket...

Page 167: ...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...

Page 168: ...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 projec...

Page 169: ...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 r...

Page 170: ...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 groove...

Page 171: ...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...

Page 172: ...160 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...

Page 173: ...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 a...

Page 174: ...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 s...

Page 175: ...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 wi...

Page 176: ...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 fi...

Page 177: ...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 th...

Page 178: ...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 P...

Page 179: ...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 mo...

Page 180: ...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...

Page 181: ...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 re...

Page 182: ...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 connect...

Page 183: ...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 t...

Page 184: ...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 S...

Page 185: ...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 illustra...

Page 186: ...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...

Page 187: ...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...

Page 188: ...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...

Page 189: ...crewdriver 5 Remove the swing motor unit 6 Detach the interlock shaft from the swing motor with a flat screw driver 7 Remove the vertical blade interlock with a flat screwdriver Step Procedure Points...

Page 190: ...BE04 808_A Indoor Unit Removal Procedure 178 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 R1...

Page 191: ...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 b...

Page 192: ...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...

Page 193: ...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...

Page 194: ...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 scre...

Page 195: ...ff all 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 valv...

Page 196: ...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...

Page 197: ...35G2V1B SiENBE04 808_A 185 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 INV...

Page 198: ...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 m...

Page 199: ...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...

Page 200: ...X S20 35G2V1B ARXS20 35G2V1B Removal Procedure 188 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...

Page 201: ..._A 189 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 R...

Page 202: ...808_A Outdoor Unit RK X S20 35G2V1B ARXS20 35G2V1B Removal Procedure 190 4 Remove the 4 screws on the right side panel 5 Remove the screw near the stop valves Step Procedure Points R7210 Right side pa...

Page 203: ...SiENBE04 808_A 191 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 th...

Page 204: ...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...

Page 205: ...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 val...

Page 206: ...B ARXS20 35G2V1B Removal Procedure 194 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 Po...

Page 207: ...Outdoor Unit RK X S20 35G2V1B ARXS20 35G2V1B SiENBE04 808_A 195 Removal Procedure 10 Lift and remove the electrical box Step Procedure Points R9348 Electrical box...

Page 208: ...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 outdo...

Page 209: ...Outdoor Unit RK X S20 35G2V1B ARXS20 35G2V1B SiENBE04 808_A 197 Removal Procedure 4 Feature of the thermistors Step Procedure Points R9356...

Page 210: ...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 th...

Page 211: ...RK X S20 35G2V1B ARXS20 35G2V1B SiENBE04 808_A 199 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...

Page 212: ...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 co...

Page 213: ...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 electri...

Page 214: ...35G2V1B ARXS20 35G2V1B Removal Procedure 202 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 S...

Page 215: ...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...

Page 216: ...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 Dis...

Page 217: ...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...

Page 218: ...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...

Page 219: ...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 braz...

Page 220: ...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 f...

Page 221: ...ll 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 co...

Page 222: ...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 pane...

Page 223: ...35G3V1B SiENBE04 808_A 211 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 INV...

Page 224: ...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 outdoo...

Page 225: ...ARXS20 35G3V1B SiENBE04 808_A 213 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...

Page 226: ...S20 35G2V1B9 ARXS20 35G3V1B Removal Procedure 214 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...

Page 227: ...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 s...

Page 228: ...G3V1B Removal Procedure 216 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...

Page 229: ...ARXS20 35G3V1B SiENBE04 808_A 217 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 Point...

Page 230: ...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...

Page 231: ...connector 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 fo...

Page 232: ...20 35G3V1B Removal Procedure 220 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 th...

Page 233: ...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 th...

Page 234: ...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 rela...

Page 235: ...20 35G2V1B9 ARXS20 35G3V1B SiENBE04 808_A 223 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...

Page 236: ...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 fo...

Page 237: ...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 ther...

Page 238: ...t RK X S20 35G2V1B9 ARXS20 35G3V1B Removal Procedure 226 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 R1186...

Page 239: ...ARXS20 35G3V1B SiENBE04 808_A 227 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 R1...

Page 240: ...SiENBE04 808_A Outdoor Unit RK X S20 35G2V1B9 ARXS20 35G3V1B Removal Procedure 228 8 Feature of the filter PCB Refer to page 24 for detail Step Procedure Points R11878...

Page 241: ...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 electric...

Page 242: ...35G2V1B9 ARXS20 35G3V1B Removal Procedure 230 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...

Page 243: ...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...

Page 244: ...Outdoor Unit RK X S20 35G2V1B9 ARXS20 35G3V1B Removal Procedure 232 4 Pull the sound blanket inner out 5 Pull the sound blanket bottom out Step Procedure Points R11887 Sound blanket inner Sound blanke...

Page 245: ...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 Disc...

Page 246: ...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...

Page 247: ...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...

Page 248: ...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...

Page 249: ...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...

Page 250: ...g 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...

Page 251: ...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...

Page 252: ...isconnect the connecting 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 powe...

Page 253: ...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 Outdo...

Page 254: ...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 connect...

Page 255: ...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...

Page 256: ...SiENBE04 808_A Outdoor Unit RK X S42G2V1B ARXS42G2V1B Removal Procedure 244 14 Remove the screw in front of the electrical box 15 Lift and remove the electrical box Step Procedure Points R0263 R0264...

Page 257: ...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 Rem...

Page 258: ...ocedure 246 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 Proced...

Page 259: ...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 th...

Page 260: ...ure 248 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 S...

Page 261: ...Outdoor Unit RK X S42G2V1B ARXS42G2V1B SiENBE04 808_A 249 Removal Procedure 12 Remove the screw of the radiation fin Step Procedure Points R12214 Radiation fin R8171...

Page 262: ...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 p...

Page 263: ...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...

Page 264: ...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 r...

Page 265: ...808_A 253 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...

Page 266: ...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...

Page 267: ...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 outd...

Page 268: ...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 wir...

Page 269: ...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...

Page 270: ...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 sh...

Page 271: ...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...

Page 272: ...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 discharg...

Page 273: ...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 t...

Page 274: ...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 Remo...

Page 275: ...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 R5248...

Page 276: ...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...

Page 277: ..._A 265 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...

Page 278: ...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...

Page 279: ...50G2V1B SiENBE04 808_A 267 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...

Page 280: ...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...

Page 281: ...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...

Page 282: ...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...

Page 283: ...G2V1B SiENBE04 808_A 271 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...

Page 284: ...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...

Page 285: ...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 Comp...

Page 286: ...oor Unit RK X S50G2V1B ARXS50G2V1B Removal Procedure 274 13 Release the harness of the outdoor temperature thermistor from the hook 14 Lift and remove the electrical box Step Procedure Points R9403 R5...

Page 287: ...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...

Page 288: ...dure 276 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 HR...

Page 289: ...0G2V1B SiENBE04 808_A 277 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 R...

Page 290: ...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...

Page 291: ...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 blank...

Page 292: ...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 Ke...

Page 293: ...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...

Page 294: ...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...

Page 295: ...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...

Page 296: ...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 t...

Page 297: ...Outdoor Unit RK X S50G2V1B ARXS50G2V1B SiENBE04 808_A 285 Removal Procedure...

Page 298: ...2 Field Settings 288 2 1 Model Type Setting 288 2 2 When 2 Units are Installed in 1 Room 288 2 3 Standby Electricity Saving 289 2 4 Facility Setting Jumper and Switch cooling at low outdoor temperatur...

Page 299: ...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 tempe...

Page 300: ...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 m...

Page 301: ...mp model Set the DIP switch to H P Cooling only model Set the DIP switch to C O 2 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...

Page 302: ...ocedure 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 connect...

Page 303: ...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 35G2V...

Page 304: ...owing 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 connecte...

Page 305: ...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...

Page 306: ...SiENBE04 808_A Appendix 294 Part 9 Appendix 1 Piping Diagrams 294 1 1 Indoor Unit 294 1 2 Outdoor Unit 295 2 Wiring Diagrams 299 2 1 Indoor Unit 299 2 2 Outdoor Unit 299...

Page 307: ...SS FLOW FAN 9 5CuT FIELD PIPING 9 5CuT 6 4CuT FIELD PIPING M INDOOR UNIT FAN MOTOR HEAT EXCHANGER 6 4CuT THERMISTOR ON HEAT EXCH REFRIGERANT FLOW COOLING HEATING 4D058897C CROSS FLOW FAN 9 5CuT 6 4CuT...

Page 308: ...MUFFLER WITH FILTER MOTOR OPERATED VALVE LIQUID STOP VALVE GAS STOP VALVE FOURWAY VALVE NORMALLY OFF DISCHARGE PIPE THERMISTOR REFRIGERANT FLOW COOLING 3D059588A 9 5CuT MUFFLER COMPRESSOR 7 0CuT 9 5C...

Page 309: ...FF DISCHARGE PIPE THERMISTOR REFRIGERANT FLOW COOLING 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...

Page 310: ...TER MUFFLER WITH FILTER MOTOR OPERATED VALVE LIQUID STOP VALVE GAS STOP VALVE FOUR WAY VALVE ON HEATING DISCHARGE PIPE THERMISTOR REFRIGERANT FLOW COOLING HEATING 3D059587A 7 9CuT 9 5CuT 7 9CuT 7 0CuT...

Page 311: ...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...

Page 312: ...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 B...

Page 313: ...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 REVER...

Page 314: ...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...

Page 315: ...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...

Page 316: ...ication to the best of its knowledge No express or implied warranty is given for the completeness accuracy reliability or fitness for particular purpose of its content and the products and services pr...

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