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Daikin Super Multi NX FDKS50CVMB, Service Manual

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Daikin Super Multi NX FDKS50CVMB Service Manual Download Page 80

Troubleshooting

SiENBE07-618_C

68

Service Diagnosis

4.8

Outdoor Unit PCB Abnormality

Remote Control 
Display

E1

Method of 
Malfunction 
Detection

„

Detection within the program of the microcomputer

Malfunction 
Decision 
Conditions

„

The program of the microcomputer is in abnormal running order.

Supposed 
Causes

„

Defective outdoor unit PCB

„

Noise

„

Momentary fall of voltage

„

Momentary power failure

Troubleshooting

(R7183)

Caution

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

YES

NO

NO

YES

Turn on the power again.

Check to see if the unit is 
grounded.

Replace the outdoor unit 
PCB.

Ground the system.

Error again?

Grounded?

The cause can be external 
factors other than 
malfunction.Investigate the 
cause of noise.

SIENBE07-618_C_FRONT.pdf   80

9/02/2011   9:25:07

Summary of Contents for Super Multi NX FDKS50CVMB

Page 1: ...SiENBE07 618_C Service Manual Inverter Pair Duct Connected Type C Series Applied Models z Inverter Pair Cooling only z Inverter Pair Heat Pump...

Page 2: ...SiENBE07 618_C Service Manual Inverter Pair Duct Connected Type C Series Applied Models z Inverter Pair Cooling only z Inverter Pair Heat Pump...

Page 3: ...d Type C Series zCooling Only Indoor Unit FDKS50CVMB FDKS60CVMB Outdoor Unit RKS50E2 3 V1B RKS50F2V1B RKS50G2V1B RKS60E2 3 V1B RKS60F2 3 V1B zHeat Pump Indoor Unit FDXS50CVMB FDXS60CVMB Outdoor Unit R...

Page 4: ...for Indoor Units 20 1 4 Program Dry Operation 21 1 5 Automatic Operation 22 1 6 Thermostat Control 23 1 7 NIGHT SET Mode 24 1 8 HOME LEAVE Operation 25 1 9 Inverter POWERFUL Operation 26 1 10 Other F...

Page 5: ...ndoor Unit 65 4 6 Signal Transmission Error between Indoor Unit and Outdoor Unit 66 4 7 Unspecified Voltage between Indoor Unit and Outdoor Unit 67 4 8 Outdoor Unit PCB Abnormality 68 4 9 OL Activatio...

Page 6: ...onic Expansion Valve 121 1 8 Removal of Compressor 122 Part 8 Trial Operation and Field Settings 125 1 Trial Operation 126 2 Field Settings 127 2 1 When 2 Units are Installed in 1 Room 127 2 2 Facilit...

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 su...

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...

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 t...

Page 10: ...vent 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...

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...

Page 12: ...Introduction SiENBE07 618_C x...

Page 13: ...SiENBE07 618_C List of Functions 1 Part 1 List of Functions 1 Functions 2...

Page 14: ...urability Auto Restart after Power Failure 3 D Airflow Self Diagnosis Digital LED Display Comfort Control Auto Fan Speed Wiring Error Check Indoor Unit Quiet Operation Anti Corrosion Treatment of Outd...

Page 15: ...to Restart after Power Failure 3 D Airflow Self Diagnosis Digital LED Display Comfort Control Auto Fan Speed Wiring Error Check Indoor Unit Quiet Operation Anti Corrosion Treatment of Outdoor Heat Exc...

Page 16: ...ty Durability Auto Restart after Power Failure 3 D Airflow Self Diagnosis Digital LED Display Comfort Control Auto Fan Speed Wiring Error Check Indoor Unit Quiet Operation Anti Corrosion Treatment of...

Page 17: ...SiENBE07 618_C Specifications 5 Part 2 Specifications 1 Specifications 6 1 1 Cooling Only 6 1 2 Heat Pump 9...

Page 18: ...Proof Removable Washable Mildew Proof Running Current Rated A 0 64 0 74 Power Consumption Rated W 140 160 Power Factor 95 1 94 0 Temperature Control Microcomputer Control Microcomputer Control Dimensi...

Page 19: ...ashable Mildew Proof Running Current Rated A 0 64 0 74 Power Consumption Rated W 140 160 Power Factor 95 1 94 0 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 200...

Page 20: ...le Washable Mildew Proof Running Current Rated A 0 64 0 74 Power Consumption Rated W 140 160 Power Factor 95 1 94 0 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm...

Page 21: ...vable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 64 0 64 0 74 0 74 Power Consumption Rated W 140 140 160 160 Power Factor 95 1 95 1 94 0 94 0 Temperature Control M...

Page 22: ...ashable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 64 0 64 0 74 0 74 Power Consumption Rated W 140 140 160 160 Power Factor 95 1 95 1 94 0 94 0 Temperature Control Microcom...

Page 23: ...le Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 64 0 64 0 74 0 74 Power Consumption Rated W 140 140 160 160 Power Factor 95 1 95 1 94 0 94 0 Temperature Control Micr...

Page 24: ...E07 618_C 12 Printed Circuit Board Connector Wiring Diagram Part 3 Printed Circuit Board Connector Wiring Diagram 1 Printed Circuit Board Connector Wiring Diagram 13 1 1 Indoor Unit 13 1 2 Outdoor Uni...

Page 25: ...heat exchanger thermistor 6 H1 H2 H3 Connector for terminal board 7 GND Connector for terminal board earth 8 JA Address setting jumper Refer to page 127 for detail JB Fan speed setting when compressor...

Page 26: ...r Wiring Diagram SiENBE07 618_C 14 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB 1 Control PCB PCB 2 Display PCB S1 H2 S7 S26 S32 JC JB JA S21 2P131149 1 LED A FU1 H1 H3 V1 GND S1 LED3...

Page 27: ...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 HR1 HR2 Co...

Page 28: ...Circuit Board Connector Wiring Diagram PCB Detail PCB 1 Main PCB PCB 2 Service Monitor PCB V3 V11 AC1 E1 E2 FU2 3 15A HR1 HR2 FU3 3 15A 2P169046 1 2P169046 5 2P169046 7 S40 S20 S70 S90 S51 W V U S10...

Page 29: ...ter POWERFUL Operation 26 1 10 Other Functions 27 2 Function of Thermistor 28 3 Control Specification 29 3 1 Mode Hierarchy 29 3 2 Frequency Control 30 3 3 Controls at Mode Changing Start up 32 3 4 Di...

Page 30: ...tion The target frequency is set by the following 2 parameters coming from the operating indoor unit The load condition of the operating indoor unit The difference between the room thermistor temperat...

Page 31: ...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 32: ...ration the step SL is not available The airflow rate is automatically controlled within this range when the FAN setting button is set to automatic Cooling The following drawing explains the principle...

Page 33: ...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 34: ...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 35: ...eing 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...

Page 36: ...he 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 Target temperature...

Page 37: ...cated on the display of the remote control The indoor unit is operated according to the set temperature and airflow rate for HOME LEAVE which were pre set in the memory of the remote control The LED r...

Page 38: ...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 30 C FAN H tap 50 rpm...

Page 39: ...button once to start operation Press once again to stop it This button is useful when the remote control is missing or the battery has run out The operation mode refers to the following table Forced...

Page 40: ...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 41: ...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 42: ...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 43: ...ume 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 20 seconds and the frequency is adjusted according to...

Page 44: ...to eliminate the switching sound when the heating is stopped as the four way valve coil switches from ON to OFF the OFF delay switch of the four way valve is carried out after the operation stopped D...

Page 45: ...charge pipe temperature rises above a certain level the upper limit of frequency is set to keep this temperature from going up further Detail Hz Frequency Sec Time TCG1 R10540 TCG2 TCG3 FCG 3 FCG 1 FC...

Page 46: ...s zone the compressor is stopped Drooping zone The upper limit of the compressor frequency is defined as operation frequency 2 Hz After this the output frequency is pulled down by 2 Hz every second un...

Page 47: ...eat exchanger temperature determines the frequency upper limit to prevent abnormal high pressure Detail R4561 Return from stop Reset zone Up zone Keep zone Drooping zone Stop zone 0 C 3 C 5 C 7 C 13 C...

Page 48: ...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 49: ...re and the outdoor heat exchanger temperature The system is in heating operation The compressor operates for 6 minutes 44 minutes of accumulated time pass since the start of the operation or ending of...

Page 50: ...alve 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 t...

Page 51: ...minimum opening of the electronic expansion valve are limited Detail The electronic expansion valve is fully closed when cooling is stopped and is opened at fixed degree during defrosting 3 11 4 Start...

Page 52: ...6 C indoor heat exchanger temperature Adjustment when the thermistor is disconnected When the disconnection is ascertained the compressor continues operation for 9 minutes and then stops When the comp...

Page 53: ...If the inverter current exceeds 20 A the system shuts down the compressor 3 12 3 Refrigerant Shortage Control Outline I Detecting by power consumption If the power consumption is below the specified...

Page 54: ...utdoor unit is not operating The forced operation is allowed when the above both conditions are met Start Press the forced operation ON OFF button SW1 on the indoor unit for 5 seconds Command frequenc...

Page 55: ...Operation Manual 1 System Configuration 44 2 Operation Manual 45 2 1 Remote Control 45 2 2 AUTO DRY COOL HEAT FAN Operation 46 2 3 POWERFUL Operation 48 2 4 OUTDOOR UNIT QUIET Operation 49 2 5 HOME L...

Page 56: ...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 57: ...POWERFUL button POWERFUL operation 5 TEMPERATURE adjustment buttons It changes the temperature setting 6 ON OFF button Press this button once to start operation Press once again to stop it 7 MODE sel...

Page 58: ...a operation mode Each pressing of the button advances the mode setting in sequence AUTO DRY COOL HEAT FAN FDKS FDXS 2 Press ON OFF button The OPERATION lamp lights up To stop operation 3 Press ON OFF...

Page 59: ...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 sy...

Page 60: ...When using POWERFUL operation there are some functions which are not available is displayed on the LCD To cancel POWERFUL operation 2 Press POWERFUL button again disappears from the LCD 1 2 Notes on...

Page 61: ...played 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...

Page 62: ...r HOME LEAVE operation When using HOME LEAVE operation for the first time please set the temperature and air flow rate for HOME LEAVE operation Record your preferred temperature and air flow rate 1 Pr...

Page 63: ...n you will be welcomed by a comfortably air conditioned room Push the HOME LEAVE Operation button again and the air conditioner will adjust capacity to the set temperature for normal operation Set the...

Page 64: ...g 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 lamp go...

Page 65: ...ng 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 TIMER lamp goe...

Page 66: ...and Outdoor Unit 67 4 8 Outdoor Unit PCB Abnormality 68 4 9 OL Activation Compressor Overload 69 4 10 Compressor Lock 70 4 11 DC Fan Lock 71 4 12 Input Overcurrent Detection 72 4 13 Four Way Valve Ab...

Page 67: ...of the indoor unit or the outdoor unit is activated or when the thermistor malfunctions 2 When a signal transmission error occurs between the indoor unit and the outdoor units In either case conduct t...

Page 68: ...ating operation cannot be used when the outdoor temperature is 18 C or higher and cooling operation cannot be used when the outdoor temperature is below 10 C Diagnose with remote control indication 60...

Page 69: ...ow 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 is lef...

Page 70: ...d 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 accor...

Page 71: ...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 72: ...Room temperature thermistor or related abnormality 65 Outdoor Unit E1 Outdoor unit PCB abnormality 68 E5H OL activation compressor overload 69 E6H Compressor lock 70 E7 DC fan lock 71 E8 Input overcu...

Page 73: ...n 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 re...

Page 74: ...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 75: ...ean 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 accumul...

Page 76: ...P 100 NO NO NO Check No 16 Check Hall IC NO NO NO YES YES YES YES YES YES R11411 Caution Replace the fan motor or the indoor unit PCB Replace the fan motor Replace the indoor unit PCB Replace the capa...

Page 77: ...mpressor operation Supposed Causes Disconnection of connector Defective thermistor Defective indoor unit PCB Troubleshooting Check No 06 Refer to P 96 C4 Indoor heat exchanger thermistor C9 Room tempe...

Page 78: ...ooting Check No 10 Refer to P 98 Check No 10 Check the power 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...

Page 79: ...iring of connection 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 80: ...ing order Supposed Causes Defective outdoor unit PCB Noise Momentary fall of voltage Momentary power failure Troubleshooting R7183 Caution Be sure to turn off the power switch before connecting or dis...

Page 81: ...ective stop valve Troubleshooting Check No 04 Refer to P 94 Check No 05 Refer to P 95 Check No 06 Refer to P 96 Check No 11 Refer to P 98 R11971 Caution YES NG Discharge pipe thermistor NO OK OK NG Re...

Page 82: ...sor harness Troubleshooting Turn off the power Disconnect the harnesses U V and W R8065 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damag...

Page 83: ...s 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 100 R11708 Caution YES YES NO YES NO NO YES NO T...

Page 84: ...onnecting 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 ex...

Page 85: ...function Decision Conditions A following condition continues over 1 minute after operating for 10 minutes Cooling Dry room thermistor temp indoor heat exchanger temp 5 C Heating indoor heat exchanger...

Page 86: ...e 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 Refrigerant shortage Water m...

Page 87: ...emperature thermistor Defective electronic expansion valve or coil Refrigerant shortage Defective four way valve Water mixed in refrigerant Defective stop valve Defective outdoor unit PCB Troubleshoot...

Page 88: ...thermistor Defective outdoor unit PCB Troubleshooting Check No 04 Refer to P 94 Check No 06 Refer to P 96 Check No 07 Refer to P 97 Check No 08 Refer to P 97 Check No 09 Refer to P 98 R11897 Caution R...

Page 89: ...operly R7174 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 o...

Page 90: ...r running condition through the position detection circuit Malfunction Decision Conditions If the error repeats 8 times the system is shut down Reset condition Continuous run for about 5 minutes witho...

Page 91: ...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 capacitor v...

Page 92: ...uency and CT detected input current Malfunction Decision Conditions The compressor running frequency is more than Hz and the CT input current is below A If the error repeats 4 times the system is shut...

Page 93: ...and restart operation 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...

Page 94: ...V with the power on J3 error is judged if the discharge pipe temperature is lower than the outdoor heat exchanger temperature Supposed Causes Disconnection of the connector for the thermistor Defectiv...

Page 95: ...following thermistors Outdoor temperature thermistor Discharge pipe thermistor Outdoor heat exchanger thermistor Cooling Outdoor heat exchanger temperature Heating Indoor heat exchanger temperature R...

Page 96: ...unction Decision Conditions With the compressor off the radiation fin temperature is above C The error is cleared when the radiation fin temperature drops below C To cool the electrical components the...

Page 97: ...fin temperature rises above C and stops when it drops below C R11409 YES NO Slightly dirty NG Too dirty OK NO YES Turn off the power and turn it on again Check the radiation fin temperature Check No...

Page 98: ...on fin temperature with the compressor on is above C The error is cleared when the radiation fin temperature drops below C If the error repeats the system is shut down Reset condition Continuous run f...

Page 99: ...o start the system Check the radiation fin temperature Check No 07 Check the installation condition NO YES YES Radiation fin dirty Above C Check No 09 Check the outdoor fan or related Error displayed...

Page 100: ...urs 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 e...

Page 101: ...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 again...

Page 102: ...ortage detection I The following conditions continue for 7 minutes DC current Output frequency Output frequency Refrigerant shortage detection II The following conditions continue for 80 seconds Targe...

Page 103: ...Repair the 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...

Page 104: ...sor stops if the error occurs and restarts automatically after 3 minute standby Supposed Causes Supply voltage is not as specified Defective DC voltage detection circuit Defective over voltage detecti...

Page 105: ...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 R...

Page 106: ...e 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 a...

Page 107: ...the power and turn it on again Disconnect the four way valve coil from the connector and check the continuity Start heating operation Four way valve coil Cooling Dry No continuity Heating Continuity R...

Page 108: ...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 109: ...location or direction Check the allowable dimensions of the air suction and discharge area Is the airflow blocked by obstacles or winds blowing in the opposite direction R12221 NG YES YES YES Is the d...

Page 110: ...orm disturbance near the zero cross sections circled in Fig 2 5 1 8 Inverter Units Refrigerant System Check Check No 11 R7159 YES YES NO NO Outdoor fan system is functioning Check the outdoor fan syst...

Page 111: ...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 compres...

Page 112: ...ed 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...

Page 113: ...1 Removal of Outer Panels 102 1 2 Removal of Outdoor Fan Fan Motor 106 1 3 Removal of Electrical Box 110 1 4 Removal of PCB 115 1 5 Removal of Sound Blanket Thermistors 118 1 6 Removal of Four Way Val...

Page 114: ...g 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 t...

Page 115: ...ischarge 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...

Page 116: ...ft 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...

Page 117: ...ocedure 105 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 Procedur...

Page 118: ...edure 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 o...

Page 119: ...door Unit Removal Procedure 107 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 mot...

Page 120: ...an 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...

Page 121: ...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...

Page 122: ...sassembling 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...

Page 123: ...Outdoor Unit Removal Procedure 111 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 R...

Page 124: ...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 the...

Page 125: ...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...

Page 126: ...r Unit SiENBE07 618_C 114 Removal Procedure 13 Release the harness of the outdoor temperature thermistor from the hook 14 Lift and remove the electrical box Step Procedure Points R9403 R5279 Electrica...

Page 127: ...re 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...

Page 128: ...fasten 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 Pr...

Page 129: ...oor Unit Removal Procedure 117 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 16 for detail Step Procedure Points Main PCB R5287 R5288 Ho...

Page 130: ...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 remov...

Page 131: ...lease 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...

Page 132: ...n 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...

Page 133: ...as 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 envir...

Page 134: ...ssor 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 wir...

Page 135: ...ed 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 view...

Page 136: ...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 co...

Page 137: ...Field Settings 1 Trial Operation 126 2 Field Settings 127 2 1 When 2 Units are Installed in 1 Room 127 2 2 Facility Setting Switch cooling at low outdoor temperature 128 2 3 Jumper and Switch Settings...

Page 138: ...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 temperat...

Page 139: ...stalled in 1 room 1 of the 2 pairs of indoor unit and infrared remote control can be set for different addresses Both the indoor unit PCB and the infrared remote control need alteration Indoor Unit PC...

Page 140: ...Do not place humidifiers or other items which might raise the humidity in rooms where facility settings are being used A humidifier might cause dew jumping from the indoor unit outlet vent 4 Use the i...

Page 141: ...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 142: ...SiENBE07 618_C 130 Appendix Part 9 Appendix 1 Piping Diagrams 131 1 1 Indoor Unit 131 1 2 Outdoor Unit 132 2 Wiring Diagrams 133 2 1 Indoor Unit 133 2 2 Outdoor Unit 134...

Page 143: ...1 1 Indoor Unit FDKS50 60CVMB FDXS50 60CVMB FIELD PIPING FIELD PIPING CuT 6 4CuT INDOOR UNIT SIROCCO FAN 6 4CuT CuT FAN MOTOR M REFRIGERANT FLOW HEAT EXCHANGER COOLING HEATING 12 7 FDXS50CVMB FDXS60C...

Page 144: ...AS STOP VALVE WITH SERVICE PORT LIQUID STOP VALVE MUFFLER WITH FILTER MOTOR OPERATED VALVE MUFFLER WITH FILTER OUTDOOR AIR TEMPERATURE THERMISTOR CAPILLARY TUBE 2 CAPILLARY TUBE 3 3D051636N OUTDOOR UN...

Page 145: ...V1TR S1W X1M Z1C H1P H3P R1T R2T PCB1 PCB2 S1 S32 RTH1 GND H2 H3 H1 FAN MOTOR PRINTED CIRCUIT BOARD NOISE FILTER FERRITE CORE PHASE CONTROL CIRCUIT TERMINAL BLOCK OPERATION SWITCH THERMAL PROTECTOR M...

Page 146: ...RED 3 15A 30A BLK MRM20 X1M BLU S51 W WHT RED BLU S20 W X2M 5 X12A 1 BLK SW1 ORG AC2 Y1E S70 R3T SA2 5 Z2C RED TERMINAL STRIP FIXED PLATE t t t OUTDOOR DISCHARGE CONDENSER 3D056145A outdoor indoor FIE...

Page 147: ...RONIC EXPANSION VALVE COIL VARISTOR SURGE ARRESTER FUSE CONNECTOR MRC W OUTDOOR DISCHARGE CONDENSER 3D065097A outdoor SA2 FIELD WIRING YLW GRN SHEET METAL X1M indoor 4 WHT 5 E2 BLK S90 3 15A BLU 1 U B...

Page 148: ...AN MOTOR REACTOR OVERLOAD PROTECTOR POWER MODULE PRINTED CIRCUIT BOARD REVERSING SOLENOID VALVE COIL TERMINAL STRIP FIXED PLATE 3D050706K L1R GRN GRN YLW Z1C WHT WHT X1M HR2 GRN HR1 E1 Z5C E2 L SA2 MR...

Page 149: ...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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