Daikin VRVIII-S Service Manual Download Page 255

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RXYSQ4 · 5 · 6 P7Y1B

SiENBE34-703

244

Removal Procedure

Step

Procedure

Points

Removing heat
exchanger cover
Remove the heat
exchanger cover after
releasing its three
hooks with a minus
driver.

Remove the ambient air
temperature thermistor
after pulling it to the
near side and sliding to
the right.

10 The figure in the right is

of rear side view.

Ambient air
temperature
thermistor
(RIT)

Summary of Contents for VRVIII-S

Page 1: ...SiENBE34 703 Basic Training Manual R 410A Heat Pump 50Hz Service Manual...

Page 2: ...33 1 List of Electrical and Functional Parts 34 1 1 Outdoor Unit 34 Part 4 Refrigerant Circuit 35 1 Refrigerant Circuit 36 1 1 RXYSQ4 5 6P 36 2 Functional Parts Layout 38 2 1 RXYSQ4 5 6P 38 Part 5 Fu...

Page 3: ...NSPECTION TEST Button 108 2 2 Self diagnosis by Wired Remote Control 109 2 3 Self diagnosis by Infrared Remote Control 110 2 4 Operation of the remote control s Inspection Test Operation Button 112 2...

Page 4: ...l 159 3 33 L8 Outdoor Unit Inverter Current Abnormal 160 3 34 L9 Outdoor Unit Inverter Start up Error 161 3 35 LC Outdoor Unit Malfunction of Transmission between Inverter and Control PC Board 162 3 3...

Page 5: ...Wiring 203 2 3 Indoor Unit 204 3 Option List 218 3 1 Option List of Controllers 218 3 2 Option List of Outdoor Unit 220 4 Example of Connection 222 5 Thermistor Resistance Temperature Characteristics...

Page 6: ...plug socket before disassembling the equipment for a repair Working on the equipment that is connected to a power supply can cause an electrical shook If it is necessary to supply power to the equipme...

Page 7: ...the applicable model and appropriate tools to conduct repair work Never attempt to modify the equipment The use of inappropriate parts or tools can cause an electrical shock excessive heat generation...

Page 8: ...rvice valve to prevent the refrigerant gas from leaking into the room The refrigerant gas itself is harmless but it can generate toxic gases when it contacts flames such as fan and other heaters stove...

Page 9: ...cal shock Be sure to measure the insulation resistance after the repair and make sure that the resistance is 1 Mohm or higher Faulty insulation can cause an electrical shock Be sure to check the drain...

Page 10: ...S series Heat Pump System Daikin offers a wide range of models to respond to building and office air conditioning needs We are confident that customers will be able to find the models that best suit...

Page 11: ...Introduction SiENBE34 703 x...

Page 12: ...SiENBE34 703 General Information 1 Part 1 General Information 1 Model Names of Indoor Outdoor Units 2 2 External Appearance 3 2 1 Indoor Units 3 3 Capacity Range 4...

Page 13: ...V1 Ceiling Mounted Cassette Corner Type FXKQ 25MA 32MA 40MA 63MA VE Slim Ceiling Mounted Duct Type FXDQ P 20P 25P 32P FXDQ NA 20NA 25NA 32NA 40NA 50NA 63NA FXDQ M8 20M8 25M8 V3 Ceiling Mounted Built...

Page 14: ...ti Flow FXZQ20M8 FXZQ25M8 FXZQ32M8 FXZQ40M8 FXZQ50M8 Wall Mounted Type FXAQ20MA FXAQ25MA FXAQ32MA FXAQ40MA FXAQ50MA FXAQ63MA Ceiling Mounted Cassette Corner Type FXKQ25MA FXKQ32MA FXKQ40MA FXKQ63MA Fl...

Page 15: ...25P7 32P7 40P7 50P7 63P7 80P7 100P7 125P7 600 600 Ceiling Mounted Cassette Type Multi Flow FXZQ 20M8 25M8 32M8 40M8 50M8 Ceiling Mounted Cassette Corner Type FXKQ 25MA 32MA 40MA 63MA Slim Ceiling Moun...

Page 16: ...SiENBE34 703 Specifications 5 Part 2 Specifications 1 Specifications 6 1 1 Outdoor Units 6 1 2 Indoor Units 8...

Page 17: ...ng Method Direct on line Direct on line Fan Type Propeller Fan Propeller Fan Motor Output W 70 2 70 2 Air Flow Rate C H m min 106 102 106 105 Drive Direct Drive Direct Drive Connecting Pipes Liquid Pi...

Page 18: ...p m 6 480 Motor Output Number of Units kW 3 5 1 Starting Method Direct on line Fan Type Propeller Fan Motor Output W 70 2 Air Flow Rate C H m min 106 105 Drive Direct Drive Connecting Pipes Liquid Pi...

Page 19: ...ion these values are normally somewhat higher as a result of ambient conditions Model FXCQ20M8V3 FXCQ25M8V3 FXCQ32M8V3 FXCQ40M8V3 H1 Cooling Capacity 19 5 CWB kcal h Btu h kW H2 Cooling Capacity 19 0...

Page 20: ...se values are normally somewhat higher as a result of ambient conditions Model FXCQ50M8V3 FXCQ63M8V3 FXCQ80M8V3 FXCQ125M8V3 H1 Cooling Capacity 19 5 CWB kcal h Btu h kW H2 Cooling Capacity 19 0 CWB kW...

Page 21: ...values are normally somewhat higher as a result of ambient conditions Model FXFQ20P7VE FXFQ25P7VE FXFQ32P7VE FXFQ40P7VE H1 Cooling Capacity 19 5 CWB kcal h Btu h kW H2 Cooling Capacity 19 0 CWB kW H3...

Page 22: ...se values are normally somewhat higher as a result of ambient conditions Model FXFQ50P7VE FXFQ63P7VE FXFQ80P7VE FXFQ100P7VE H1 Cooling Capacity 19 5 CWB kcal h Btu h kW H2 Cooling Capacity 19 0 CWB kW...

Page 23: ...ues are normally somewhat higher as a result of ambient conditions Model FXFQ125P7VE H1 Cooling Capacity 19 5 CWB kcal h Btu h kW H2 Cooling Capacity 19 0 CWB kW H3 Heating Capacity kcal h Btu h kW Ca...

Page 24: ...tion these values are normally somewhat higher as a result of ambient conditions Model FXZQ20M8V1 FXZQ25M8V1 FXZQ32M8V1 H1 Cooling Capacity 19 5 CWB kcal h Btu h kW H2 Cooling Capacity 19 0 CWB kW H3...

Page 25: ...operation these values are normally somewhat higher as a result of ambient conditions Model FXZQ40M8V1 FXZQ50M8V1 H1 Cooling Capacity 19 5 CWB kcal h Btu h kW H2 Cooling Capacity 19 0 CWB kW H3 Heatin...

Page 26: ...nection 6 4 Flare Connection 6 4 Flare Connection 9 5 Flare Connection Gas Pipes mm 12 7 Flare Connection 12 7 Flare Connection 12 7 Flare Connection 15 9 Flare Connection Drain Pipe mm VP25 External...

Page 27: ...te H L m min 9 5 7 5 9 5 7 5 10 5 8 5 External Static Pressure Pa 44 15 H5 44 15 H5 44 15 H5 Drive Direct Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and...

Page 28: ...w Rate H L m min 10 5 8 5 12 5 10 0 16 5 13 0 External Static Pressure Pa 44 15 H5 44 15 H5 44 15 H5 Drive Direct Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cool...

Page 29: ...the conversion values in anechoic chamber In practice the sound tend to be larger than the specified values due to ambient noise or reflections When the place of suction is changed to the bottom sucti...

Page 30: ...ured at a point 1 5m downward from the unit center These values are normally somewhat higher during actual operation as a result of ambient conditions Model FXSQ20M8V3 FXSQ25M8V3 FXSQ32M8V3 H1 Cooling...

Page 31: ...easured at a point 1 5m downward from the unit center These values are normally somewhat higher during actual operation as a result of ambient conditions Model FXSQ40M8V3 FXSQ50M8V3 FXSQ63M8V3 H1 Cool...

Page 32: ...a point 1 5m downward from the unit center These values are normally somewhat higher during actual operation as a result of ambient conditions Model FXSQ80M8V3 FXSQ100M8V3 FXSQ125M8V3 H1 Cooling Capac...

Page 33: ...r Flow Rate H L m min 14 11 5 14 11 5 14 11 5 19 5 16 cfm 494 406 494 406 494 406 688 565 External Static Pressure 50 60Hz Pa 157 157 118 108 H4 157 157 118 108 H4 157 157 118 108 H4 157 160 108 98 H4...

Page 34: ...nized Steel Plate Dimensions H W D mm 390 1 110 690 390 1 110 690 Coil Cross Fin Coil Rows Stages Fin Pitch mm 3 16 2 0 3 16 2 0 Face Area m 0 319 0 319 Fan Model 2D11 2D3AG1VE 2D11 2D3AF1VE Type Siro...

Page 35: ...8 Drive Direct Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Coo...

Page 36: ...8 5 9 5 5 cfm 265 159 282 177 318 194 Drive Direct Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heat...

Page 37: ...9 15 12 19 14 cfm 424 318 530 424 671 494 Drive Direct Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and...

Page 38: ...6 cfm 247 212 247 212 282 212 Drive Direct Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Micro...

Page 39: ...1 16 12 cfm 388 300 494 388 565 424 Drive Direct Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating...

Page 40: ...7 6 8 6 cfm 247 212 247 212 282 212 Drive Direct Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heatin...

Page 41: ...8 5 14 11 16 12 cfm 388 300 494 388 565 424 Drive Direct Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling an...

Page 42: ...Turbo Fan Turbo Fan Motor Output Number of Units W 45 1 90 1 90 1 Air Flow Rate H L m min 19 14 29 21 32 23 cfm 671 494 1 024 741 1 130 812 Drive Direct Drive Direct Drive Direct Drive Temperature Con...

Page 43: ...Liquid Pipes 9 5mm Flare Connection 9 5mm Flare Connection 9 5mm Flare Connection Gas Pipes 15 9mm Flare Connection 15 9mm Flare Connection 15 9mm Flare Connection Outdoor Unit Liquid Pipes 9 5mm Fla...

Page 44: ...SiENBE34 703 List of Electrical and Functional Parts 33 Part 3 List of Electrical and Functional Parts 1 List of Electrical and Functional Parts 34 1 1 Outdoor Unit 34...

Page 45: ...1P X25A Solenoid valve Hot gas Y2S TEV1620DQ2 A1P X26A Solenoid valve Unload circuit Y3S TEV1620DQ2 A1P X27A Pressure related parts Pressure switch INV S1PH ACB 4UB10 OFF 4 0 0 0 15MPa ON 3 0 0 15MPa...

Page 46: ...SiENBE34 703 Refrigerant Circuit 35 Part 4 Refrigerant Circuit 1 Refrigerant Circuit 36 1 1 RXYSQ4 5 6P 36 2 Functional Parts Layout 38 2 1 RXYSQ4 5 6P 38...

Page 47: ...e to stop the compressor operation S Fusible plug In order to prevent the increase of pressure when abnormal heating is caused by fire or others the fusible part of the plug is molten at a temperature...

Page 48: ...eat exchanger Filter Heat exchanger Four way valve Service port High pressure sensor Pressure regulating valve Stop valve With service port on field piping side 7 9mm flare connection Filter Filter Ca...

Page 49: ...1E ELECTRONIC EXPANSION VALVE CONNECTOR COLOR WHITE R7T THERMISTOR LIQUID PIPE Y3E ELECTRONIC EXPANSION VALVE MARKING COLOR BLUE CRANKCASE HEATER LEAD WIRE E1HC CONNECTOR COLOR GRAY HIGH VOLTAGE THERM...

Page 50: ...Operation 51 4 Protection Control 52 4 1 High Pressure Protection Control 52 4 2 Low Pressure Protection Control 53 4 3 Discharge Pipe Protection Control 54 4 4 Inverter Protection Control 55 5 Other...

Page 51: ...or thermostat OFF Malfunction Standby Indoor unit stop or thermostat OFF Normal operation Compressor PI control Electronic expansion valve PI control Protection control Cooling or heating operation M...

Page 52: ...Four way valve OFF Main electronic expansion valve EV1 480 pls Subcooling electronic expansion valve EV3 PI control Hot gas bypass valve SVP OFF This valve turns on with low pressure protection contro...

Page 53: ...setting TcS Target Tc value Varies depending on Tc setting operating frequency etc L M Normal factory setting H 43 46 49 STn INV Fullload INV Unload STn INV Fullload INV Unload STn INV Fullload INV Un...

Page 54: ...ing on the discharge pipe superheated degree of inverter compressor Subcooling Electronic Expansion Valve EV3 Control Makes PI control of the electronic expansion valve Y3E to keep the superheated deg...

Page 55: ...un in Step 5 or higher When outdoor temperature 12 C it will run in Step 1 or higher Fan Steps Cooling STEP0 STEP1 STEP2 STEP3 STEP4 STEP5 STEP6 STEP7 STEP8 M1F 0rpm 250rpm 400rpm 285rpm 360rpm 445rpm...

Page 56: ...Pc Pe 0 39MPa is achieved Outdoor unit fan STEP7 Ta 20 C OFF Ta 20 C STEP4 1 step 15 sec when Pc 2 16MPa 1 step 15 sec when Pc 1 77MPa Four way valve 20S1 Holds OFF OFF Main electronic expansion valve...

Page 57: ...oor unit actuator Oil return preparation operation Oil return operation Post oil return operation Compressor Take the current step as the upper limit 52 Hz Full load Low pressure constant control Same...

Page 58: ...1 minute to reduce noise on changing of the four way valve Outdoor Unit Actuator Oil return preparation operation Oil return operation Post oil return operation Compressor Upper limit control 140 Hz...

Page 59: ...t the compressor stops for 1 minute to reduce noise on changing of the four way valve Outdoor unit actuator Defrost preparation operation Defrost operation Post Defrost operation Compressor Upper limi...

Page 60: ...down Residual Operation in Heating Operation Actuator Pump down residual operation Step 1 Pump down residual operation Step 2 Compressor 124 Hz Full load 52 Hz Full load Outdoor unit fan Fan control...

Page 61: ...f and to equalize pressure in the refrigerant system Actuator Operation Remarks Compressor OFF Outdoor unit fan Ta 30 C STEP4 Ta 30 C OFF Four way valve Keep former condition Main electronic expansion...

Page 62: ...is cleared up 3 6 1 When System is in Stop Mode Actuator Operation Compressor OFF Outdoor unit fan OFF Four way valve Keep former condition Main electronic expansion valve EV1 0 pls Subcooling electr...

Page 63: ...limit frequency 1 step up from current compressor frequency After 15 sec Pc 3 23MPa Pc 3 47MPa After 10 sec INV upper limit frequency 3 step down from current compressor frequency High pressure limit...

Page 64: ...n occurring 3 times within 30 min the malfunction code E4 is output 36Hz Unload Pe 0 07MPa Low pressure standby Ts Teg 8deg Pe 0 06MPa INV upper limit frequency 3 step down from current compressor fre...

Page 65: ...er 30 sec HTdi 100 C Tp 110 C Discharge pipe temperature standby HTdi 135 C HTdi 120 C for 10 min or more or 36 Hz Unload After 20 sec HTdi 130 C HTdi 120 C for 90 sec or more or or HTdi Value of INV...

Page 66: ...2A continues for 3 min Without conditions Not limited Inverter current 12A Inverter current12A INV upper limit frequency max Hz Inverter current 12A Status quo 10 sec Matching of frequency Limited Inv...

Page 67: ...t with this mode additional setting of Continuous Demand Setting Demand 1 setting H Other protection control functions have precedence over the above operation 5 2 Heating Operation Prohibition Heatin...

Page 68: ...the fin of the indoor unit heat exchanger when the thermostat goes off during cooling operation 6 1 2 When the Float Switch is Tripped while the Cooling Thermostat is OFF ON ON ON OFF OFF OFF 5 min 5...

Page 69: ...ote If the float switch is tripped five times in succession a drain malfunction is determined to have occurred AF is then displayed as operation continues ON OFF ON OFF ON 5 min 5 min OFF ON OFF 5 sec...

Page 70: ...lti flow and corner types P0 P1 P2 P4 P3 P0 P1 P2 P4 P3 P0 P0 P1 P2 P4 P4 P2 P1 P0 P4 P4 P3 P2 P1 P0 P3 Posici n de prevenci n de corrientes Standard position Prohibited Prohibited P0 P0 P0 P1 P2 P2 P...

Page 71: ...F This example also assumes there are several other air conditioners the VRV system is off and that temperature changes even when the thermostat sensor is off Body thermostat sensor is used for tempe...

Page 72: ...24 C and the suction temperature has changed from 18 C to 28 C A D This example also assumes there are several other air conditioners the VRV system is off and that temperature changes even when the t...

Page 73: ...in accordance with the following conditions and is also set in accordance with the conditions given below Conditions for starting freeze prevention Temperature is 1 C or less for total of 40 min or t...

Page 74: ...irection LL Level Level Level Halt Swinging OFF Level Level Level Setting the wind direction OFF Level Level Level Cooling Thermostat of microcomputer dry is on Swinging L 1 Swinging Swinging Swinging...

Page 75: ...after the completion of defrosting in heating operation the indoor unit fan is controlled to prevent cold air from blasting out and ensure startup capacity Detail of operation When either the start c...

Page 76: ...Test Operation 1 Test Operation 66 1 1 Procedure and Outline 66 1 2 Operation when Power is Turned On 69 2 Outdoor Unit PC Board Layout 70 3 Field Setting 71 3 1 Field Setting from remote control 71 3...

Page 77: ...s than 380 415V circuit Are the setscrews of wiring not loose Is the electrical component box covered with an insulation cover completely Is pipe size proper The design pressure of this product is 4 0...

Page 78: ...valve Insufficient refrigerant Check if the additional refrigerant charge has been finished correctly Recalculate the required amount of refrigerant from the piping length and add an adequate amount o...

Page 79: ...that the indoor outdoor units can be operated normally When an abnormal noise due to liquid compression by the compressor can be heard stop the unit immediately and turn on the crankcase heater to hea...

Page 80: ...he addition cannot be recognized In this case the unit cannot be run for up to 12 minutes to automatically set the address indoor outdoor address etc Status Outdoor unit Test lamp H2P Blinks Can also...

Page 81: ...oise Error Demand Individual Test Page LED indicator status The LED indicator status shown at left indicates the status at factory set Turn off Turn on Turn on or off Flicker Changeover between coolin...

Page 82: ...of four seconds and the FIELD SET MODE is entered 2 Select the desired MODE NO with the button 2 3 During group control when setting by each indoor unit mode No 20 22 and 23 have been selected push t...

Page 83: ...d mode No with the button 3 Pushing the button select the first code No 4 Pushing the button select the second code No 5 Push the timer button and check the settings 6 Push the button to return to the...

Page 84: ...and 23 have been selected push the BS8 4 BUTTON unit No and select the INDOOR UNIT NO to be set This operation is unnecessary when setting by group 5 Push the BS9 BUTTON 5 set A and select FIRST CODE...

Page 85: ...ter sign is not to be displayed Display No display 12 22 0 Optional accessories output selection field selection of output for adapter for wiring Indoor unit turned ON by thermostat Operationoutput Ma...

Page 86: ...Floor standing type Ceiling suspended cassette type Multi flow Double flow 600 600 Multi flow Corner type FXFQ FXCQ FXZQ FXKQ FXDQ FXSQ FXMQ FXHQ FXAQ FXLQ FXNQ FXUQ Filter sign Ultra long life filte...

Page 87: ...thermostat is OFF Since there is concern about draft if using fan speed up when thermostat is OFF you should take the setup location into consideration Setting Table Filter Specs Setting Standard Long...

Page 88: ...equently the user might be surprised with question for the reason why 2 In the service work for example turning off the main power switch during the unit is in operation and turning on the switch agai...

Page 89: ...t to 01 Setting Table Setting of Air Flow Direction Adjustment Only the model FXKQ has the function When only the front flow is used sets yes no of the swing flap operation of down flow Setting Table...

Page 90: ...parts high performance filter etc is installed sets to change fan speed for securing air flow rate Follow the instruction manual for the optional parts to enter the setting numbers Setting of the stat...

Page 91: ...em to Field Setting Mode 2 Select the MODE No 00 with the button 3 Use the button to select the group No for each group Group numbers increase in the order of 1 00 1 01 1 15 2 00 4 15 4 Press to set t...

Page 92: ...Group No Setting Example Caution When turning the power supply on the unit may often not accept any operation while 88 is displaying after all indications were displayed once for about 1 minute on the...

Page 93: ...rature and operation mode setting by remote control can be set and displayed by operation modes 0 through 19 ON OFF control impossible by remote control Used when you want to turn on off by central re...

Page 94: ...ied operation individual operation by central remote control or operation controlled by timer Unified OFF individual stop by central remote control or timer stop ON OFF control impossible by remote co...

Page 95: ...accessory to the terminals A B and C on the outdoor X2M Terminal board A B and C 2 Set the cool heat selector switch DS1 1 from OFF which is selected at the factory before shipment to ON Dipswitch Set...

Page 96: ...tting Please Attach the Capacity Setting Adapter corresponding to Capacity Class ex 112 140 160 in connector X51A See Below Capacity Setting Adapter 1 2 3 A1P Note X51A X51A Position of Attaching the...

Page 97: ...2 BS3 BS4 BS5 RESET V2760 MODE SET RETURN TEST Setting mode 1 Monitor mode H1P H1P Setting mode 2 H1P Push and hold the BS1 MODE button for 5 seconds V2761 Off MODE On MODE Push the BS1 MODE button on...

Page 98: ...MODE BS1 button to set the system to Setting mode 1 Normally Setting mode 1 is set In case of other status push MODE BS1 button one time and set to Setting mode 1 Check the system for each condition...

Page 99: ...se signal is input from outside 26 Night time low noise operation start setting Sets starting time of nighttime low noise operation Night time low noise setting is also required 27 Night time low nois...

Page 100: ...rmal factory setting 8777787 Low 8777778 9 Tc setting 8 7 7 8 7 7 8 High 8777877 Normal factory setting 8777787 Low 8777778 10 Defrost changeover setting 8 7 7 8 7 8 7 Quick defrost 8777877 Normal fac...

Page 101: ...r 8777787 Level 3 outdoor fan with 4 step or lower 8777877 26 Night time low noise operation start setting 8 7 8 8 7 8 7 About 20 00 8777778 About 22 00 factory setting 8777787 About 24 00 8777877 27...

Page 102: ...able Refer to page 118 119 15 Contents of malfunction 1 cycle before 8 7 7 8 8 8 8 16 Contents of malfunction 2 cycle before 8 7 8 7 7 7 7 20 Contents of retry the latest 8 7 8 7 8 7 7 21 Contents of...

Page 103: ...er which translates to 16 4 2 22 base 10 number In other words the address is 22 The number of terminal blocks for No 12 and 13 is expressed as an 8 digit binary number which is the combination of fou...

Page 104: ...g operation mode In the case of wired remote controls After the check operation CHANGEOVER UNDER CONTROL is flashing in all connected remote controls Select an indoor unit to be used as the master uni...

Page 105: ...tdoor unit wiring Set outdoor unit PC board DS1 1 to OUT factory set Set cool heat switching to IND individual for Setting mode 1 factory set I O O O O A B C F1 F1 F2 F2 F1 F2 Q1 Q2 I H1P H2P H3P H4P...

Page 106: ...ise operation Use the end time as a guide since it is estimated according to outdoor temperatures 4 If necessary while in Setting mode 2 set the setting condition for set item No 29 Setting of capacit...

Page 107: ...select the set item No 30 Setting of Demand 1 level and then set the setting condition to targeted mode Image of operation Set item Condition Content Demand Mode 1 The compressor operates at approx 60...

Page 108: ...H1P on In setting 1 push and hold the BS1 MODE button for more than 5 seconds Setting mode 2 is entered and H1P lights Push the BS2 SET button several times and match the LED display with the Setting...

Page 109: ...ory setting Mode 1 9 Mode 2 9 Mode 3 9 9 26 Night time low noise start setting PM 8 00 9 PM 10 00 Factory setting 9 PM 0 00 9 27 Night time low noise end setting AM 6 00 9 AM 7 00 9 AM 8 00 Factory se...

Page 110: ...additionally charging the refrigerant In the stopped status set to ON the refrigerant additional charging operation A in set mode 2 H1P Turn on The operation is automatically started The LED indicato...

Page 111: ...B Refrigerant Recovery Vacuuming mode to ON The respective expansion valve of indoor and outdoor units are fully opened TEST OPERATION and UNDER CENTRALIZED CONTROL are displayed on the remote control...

Page 112: ...any trouble in the period of installation at site the system is provided with a test operation mode enabling check for incorrect wiring stop valve left in closed coming out or misplacing with suction...

Page 113: ...Field Setting SiENBE34 703 102 Test Operation...

Page 114: ...alfunction of Thermistor R2T for Heat Exchanger 133 3 10 C5 Indoor Unit Malfunction of Thermistor R3T for Gas Pipes 134 3 11 C9 Indoor Unit Malfunction of Thermistor R1T for Suction Air 135 3 12 CA In...

Page 115: ...nction of Transmission between remote control and Indoor Unit 171 3 42 U8 Malfunction of Transmission between Main and Sub remote controls 172 3 43 U9 Malfunction of Transmission between Indoor and Ou...

Page 116: ...ndows In cooling Too many persons staying in a room In cooling Too many heat sources e g OA equipment located in a room 4 The system does not operate The system stops and immediately restarts operatio...

Page 117: ...ght to fan LL operation so that no one gets cold air Furthermore if fan operation mode is selected when other indoor unit is in heating operation the system will be brought to fan LL operation The fan...

Page 118: ...is that the compressor changes the operating frequency Normal operation 12 Dust comes out from the system Dust comes out from the system when it restarts after the stop for an extended period of time...

Page 119: ...ained Malfunciton code history Temperature data of various sections Service settings can be made Forced fan ON Air flow direction volume setting Service mode Press Inspection Test Operation button onc...

Page 120: ...unction code and malfunction contents Note 1 Pressing the INSPECTION TEST button will blink the check indication 2 While in check mode pressing and holding the ON OFF button for a period of five secon...

Page 121: ...owing operations 1 short beep Conduct steps 3 and 4 Continue the operation in step 4 until a buzzer remains ON The continuous buzzer indicates that the malfunction code is confirmed Continuous beep No...

Page 122: ...Enters inspection mode from normal status when the INSPECTION TEST button is pressed If no button is pressed for 1 minute equipment returns to normal status When mode selector button is pressed for 1...

Page 123: ...tion test operation Inspection test operation Inspection test operation Inspection test operation 0 L 0 0 7 1 F C J A A 1 Test operation Capacity code Indoor unit system code Indoor unit type code Pro...

Page 124: ...ime mode For infrared remote control button 3 Make the settings required for each mode Modes 41 44 45 In case of Mode 44 45 push button to be able to change setting before setting work LCD code blinks...

Page 125: ...fan ON by each unit When you want to search for the unit No By selecting the unit No with the button you can turn the fan of each indoor unit on forced ON individually 44 Individual setting Set the f...

Page 126: ...code and display of malfunctioning unit No let you know the contents and location of the malfunction When there is a stop due to malfunction the contents of the malfunction given below can be diagnos...

Page 127: ...mpressor motor lock 143 E6 9 9 9 Standard compressor lock or over current E7 9 9 9 Malfunction of outdoor unit fan motor 144 E9 9 9 9 Malfunction of moving part of electronic expansion valve Y1E Y2E 1...

Page 128: ...or units and remote control 175 UC 8 8 8 Address duplication of central remote control 176 UE 9 9 9 Malfunction of transmission between central remote control and indoor unit 177 UF 9 9 9 Refrigerant...

Page 129: ...tion of DC fan 2 motor lock Malfunction of electronic expansion valve EV1 E9 EV3 Faulty sensor of outdoor air temperature Faulty Ta sensor short H9 Abnormal discharge pipe temperature Abnormal Td F3 A...

Page 130: ...7 7 7 7 9 7 7 9 9 J3 9 7 9 9 7 9 7 7 9 9 9 7 7 7 7 9 7 7 1 J5 9 7 9 7 9 9 7 7 7 7 9 7 7 9 7 7 7 7 9 7 9 J6 9 7 9 9 7 9 7 7 7 7 9 7 7 J7 9 7 9 9 9 9 7 7 7 7 9 7 7 J9 9 9 7 7 9 9 7 7 7 7 9 7 7 JA 9 9 7...

Page 131: ...tents of malfunction Malfunction code Open phase Power supply imbalance Imbalance of inverter power supply voltage P1 Faulty temperature sensor of inverter radiation fin Faulty thermistor of inverter...

Page 132: ...7 7 7 9 7 7 9 9 U2 9 7 7 9 7 9 7 7 7 7 9 7 7 1 9 7 7 7 7 7 9 9 7 7 7 7 9 7 7 9 7 9 7 7 7 7 9 7 7 7 9 U3 9 7 7 9 9 9 7 7 7 7 9 7 7 9 9 9 7 7 7 7 9 7 9 9 9 U4 9 7 9 7 7 9 7 7 7 7 9 7 7 9 9 9 7 7 7 7 9...

Page 133: ...protection device Improper field set Defect of indoor unit PC board Troubleshooting V2776 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurr...

Page 134: ...e correctly received from the E PROM E PROM Type of nonvolatile memory Maintains memory contents even when the power supply is turned off Supposed Causes Defect of indoor unit PC board Troubleshooting...

Page 135: ...Q FXMQ FXHQ Option FXAQ Option Method of Malfunction Detection By float switch OFF detection Malfunction Decision Conditions When rise of water level is not a condition and the float switch goes OFF S...

Page 136: ...nection of connector YES Provide 220 240V power supply Is power supply 220 240V provided The float switch is connected to X8A or X15A of the indoor unit PC board A short circuit connector is connected...

Page 137: ...en output voltage to the fan is maximum Supposed Causes Fan motor lock Disconnected or faulty wiring between fan motor and PC board Troubleshooting Be sure to turn off power switch before connect or d...

Page 138: ...etection Utilizes ON OFF of the limit switch when the motor turns Malfunction Decision Conditions When ON OFF of the microswitch for positioning cannot be reversed even though the swing flap motor is...

Page 139: ...X9A and turn on again Replace indoor unit PC board Replace swing motor V2780 The swing motor works when the power supply is turned off and then back on The connector is connected to X9A or X15A of th...

Page 140: ...leshooting V2781 Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Caution After connecting turn the power supply off and then back on Replace the...

Page 141: ...ectronic expansion valve Discount the electronic expansion valve from the PC board and check the continuity between the connector pins Normal Continuity No continuity Pin No 1 White 2 Yellow 3 Orange...

Page 142: ...e float switch changes from ON to OFF while the compressor is in non operation Supposed Causes Humidifier unit optional accessory leaking Defect of drain pipe upward slope etc Defect of indoor unit PC...

Page 143: ...the capacity code is not contained in the PC board s memory and the capacity setting adapter is not connected 2 When a capacity that doesn t exist for that unit is set Supposed Causes You have forgot...

Page 144: ...cted or shorted while the unit is running Supposed Causes Defect of thermistor R2T for liquid pipe Defect of indoor unit PC board Troubleshooting Refer to thermistor resistance temperature characteris...

Page 145: ...ted while the unit is running Supposed Causes Defect of indoor unit thermistor R3T for gas pipe Defect of indoor unit PC board Troubleshooting Refer to thermistor resistance temperature characteristic...

Page 146: ...nnected or shorted while the unit is running Supposed Causes Defect of indoor unit thermistor R1T for air inlet Defect of indoor unit PC board Troubleshooting Refer to thermistor resistance temperatur...

Page 147: ...comes disconnected or shorted while the unit is running Supposed Causes Defect of indoor unit thermistor for air outlet Defect of indoor unit PC board Troubleshooting Refer to thermistor resistance te...

Page 148: ...becomes disconnected or shorted while the unit is running Supposed Causes Defect of remote control thermistor Defect of remote control PC board Troubleshooting Note In case of remote control thermisto...

Page 149: ...rectly received from the E PROM E PROM Type of nonvolatile memory Maintains memory contents even when the power supply is turned off Supposed Causes Defect of outdoor unit PC board A1P Troubleshooting...

Page 150: ...t of the high pressure protection switch opens Malfunction Decision Conditions Error is generated when the HPS activation count reaches the number specific to the operation mode Reference Operating pr...

Page 151: ...lly become high CHECK 1 Refer to information on P 193 remove the causes by which the high pressure has become high 1 Make a comparison between the voltage of the pressure sensor 4 and that read by the...

Page 152: ...thod of Malfunction Detection Abnormality is detected by the pressure value with the low pressure sensor Malfunction Decision Conditions Error is generated when the low pressure is dropped under speci...

Page 153: ...fer to information on P 194 remove the causes by which the low pressure has become low 1 Make a comparison between the voltage of the pressure sensor 4 and that read by the pressure gauge As to the vo...

Page 154: ...pressor lock High differential pressure 0 5MPa or more Incorrect UVW wiring Faulty inverter PC board Stop valve is left in closed Troubleshooting Check the installation conditions Is the stop valve op...

Page 155: ...L1 and N phases are open replace the switch box Replace outdoor unit PC board If the F4U has blown out replace the fuse If the F1U has blown out replace the inverter PC board assy Replace the fan mot...

Page 156: ...trol Display E9 Applicable Models RXYSQ4 6P Method of Malfunction Detection Check disconnection of connector Check continuity of expansion valve coil Malfunction Decision Conditions Error is generated...

Page 157: ...e may be occurred Return to normal Turn power supply off and turn power supply on again Electronic expansion valve is connected to X21A and X22A of outdoor unit PC board A1P Normal when coil check 1 o...

Page 158: ...ensor Faulty connection of discharge pipe temperature sensor Faulty outdoor unit PC board Troubleshooting Refer to Thermistor Resistance Temperature Characteristics table on P225 V3068 Be sure to turn...

Page 159: ...igerant overcharge Misalignment of the thermistor for heat exchanger Defect of the thermistor for heat exchanger Troubleshooting Refer to Thermistor Resistance Temperature Characteristics table on P22...

Page 160: ...rcuit or open circuit Supposed Causes Defect of thermistor R1T for outdoor air Defect of outdoor unit PC board A1P Troubleshooting Refer to Thermistor Resistance Temperature Characteristics table on P...

Page 161: ...ure thermistor is detected Supposed Causes Defect of thermistor R2T for outdoor unit discharge pipe Defect of outdoor unit PC board A1P Troubleshooting Refer to thermistor resistance temperature chara...

Page 162: ...cted Supposed Causes Defect of thermistor R3T R5T for outdoor unit suction pipe Defect of outdoor unit PC board A1P Troubleshooting Refer to thermistor resistance temperature characteristics table on...

Page 163: ...e thermistor is detected Supposed Causes Defect of thermistor R6T for outdoor unit heat exchanger Defect of outdoor unit PC board A1P Troubleshooting Refer to thermistor resistance temperature charact...

Page 164: ...thermistor is detected Supposed Causes Defect of thermistor R7T for outdoor unit liquid pipe Defect of outdoor unit PC board A1P Troubleshooting Refer to thermistor resistance temperature characteris...

Page 165: ...circuited or open Supposed Causes Faulty subcooling heat exchanger gas pipe thermistor R4T Faulty outdoor unit PC board Troubleshooting Refer to Thermistor Resistance Temperature Characteristics tabl...

Page 166: ...Troubleshooting 1 Voltage measurement point 2 Refer to Pressure Sensor pressure voltage characteristics table on P227 V2806 Be sure to turn off power switch before connect or disconnect connector or...

Page 167: ...hooting 1 Voltage measurement point 2 Refer to Pressure Sensor pressure voltage characteristics table on P227 V2808 Be sure to turn off power switch before connect or disconnect connector or parts dam...

Page 168: ...In case of overcurrent OCP during waveform output When the current sensor malfunctions during synchronized operation In case of IGBT malfunction Supposed Causes Faulty outdoor PC board A1P IPM failure...

Page 169: ...istor Troubleshooting Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Caution Faulty heat radiation of power unit Air suction opening blocked Di...

Page 170: ...age than actual is displayed when the inverter output voltage is checked by tester V2812 Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Compres...

Page 171: ...put current check Caution Inverter output voltage check Inverter output voltage is not balanced Normal if within 5V Must be measured when frequency is stable Compressor overload Inspection of the comp...

Page 172: ...ch before connect or disconnect connector or parts damage may be occurred Inverter output voltage check Inverter output voltage is not balanced Normal if within 5V Must be measured when frequency is s...

Page 173: ...fore connect or disconnect connector or parts damage may be occurred Are the connectors of the inverter PC board and the control PC board securely connected Replace the inverter PC board A2P or the co...

Page 174: ...er supply open phase Supposed Causes Defect of main circuit capacitor Improper main circuit wiring Defect of outdoor unit PC board A2P Imbalance of phase to phase voltages Open phase Troubleshooting B...

Page 175: ...tion Detection Short of gas malfunction is detected by discharge pipe temperature thermistor and low pressure saturation temperature Malfunction Decision Conditions Microcomputer judge and detect if t...

Page 176: ...ystem Replace the thermistor Replace the outdoor unit PC board A1P Out of gas closing of stop valve or refrigerant system is clogged Requires check of refrigerant system Replace main outdoor unit PC b...

Page 177: ...lfunction Detection Detection of voltage of main circuit capacitor built in the inverter and power supply voltage Malfunction Decision Conditions When the abnormal voltage of main circuit capacitor bu...

Page 178: ...y due to faulty compressor Consequently even if the PC board is replaced it may get faulty again To avoid that recheck the compressor for grounding and for any broken wires Furthermore even after repl...

Page 179: ...Malfunction is decided when the unit starts operation without check operation Supposed Causes Check operation is not executed Troubleshooting V3052 Has the check operation performed on Outdoor unit P...

Page 180: ...nction Detection Microcomputer checks if transmission between indoor and outdoor units is normal Malfunction Decision Conditions When transmission is not carried out normally for a certain amount of t...

Page 181: ...r unit PC boardmicrocomputer monitor HAP blinks Operation ready lamp H2P is blinking Lamp does not go off for 12 minutes or more The fuse F3U on the outdoor unit s PC board is burnt Check No 3 Check f...

Page 182: ...PC board Defect of remote control PC board Malfunction of transmission caused by noise Troubleshooting Be sure to turn off power switch before connect or disconnect connector or parts damage may be o...

Page 183: ...ontinue for specified period Supposed Causes Malfunction of transmission between main and sub remote control Connection between sub remote controls Defect of remote control PC board Troubleshooting Be...

Page 184: ...splay U9 Applicable Models AII indoor unit models Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Malfunction of transmission within or outside of other system Malfunct...

Page 185: ...inutes or more Refer to failure diagnosis for U4 malfunction code U9 has been displayed for 2 minutes or more Turn on all indoor units Refer to failure diagnosis for A1 malfunction code The A1 display...

Page 186: ...outdoor unit system depends on the type of outdoor unit Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred V3169 Caution The total of indoor units...

Page 187: ...posed Causes Address duplication of centralized remote control Defect of indoor unit PC board Troubleshooting Be sure to turn off power switch before connect or disconnect connector or parts damage ma...

Page 188: ...nction Detection Microcomputer checks if transmission between indoor unit and centralized remote control is normal Malfunction Decision Conditions When transmission is not carried out normally for a c...

Page 189: ...ired incorrectly Is the master controller s connector for setting master control disconnected Set the group No correctly Replace indoor unit PC board Fix the wiring correctly Fix the wiring correctly...

Page 190: ...peration Defect of indoor unit PC board Stop valve is left in closed Troubleshooting Note Wiring check operation may not be successful if carried out after the outdoor unit has been off for more than...

Page 191: ...V2831 Caution After fixing incorrect wiring push and hold the RESET button on the master outdoor unit PC board for 5 seconds Normal Is electricity being introduced for the first time after installatio...

Page 192: ...ote control Defect of indoor unit PC board Troubleshooting Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Caution Is the power supply turned on...

Page 193: ...leshooting 4 2 M1 PC Board Defect remote control Display M1 Applicable Models Centralized remote control Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Defect of centr...

Page 194: ...ion Is transmission wiring disconnected or wired incorrectly The PC board of one of the optional controllers for centralized control is defective Try turning on off using each optional controllers for...

Page 195: ...Centralized Control remote control Display MA Applicable Models Centralized remote control Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Improper combination of opti...

Page 196: ...the power supply for all optional controllers for centralized control simultaneously Arrange so that the connector for setting master control is connected to one controller for centralized control an...

Page 197: ...ion Decision Conditions Supposed Causes Address duplication of centralized remote control Troubleshooting Be sure to turn off power switch before connect or disconnect connector or parts damage may be...

Page 198: ...splay Operation lamp blinks Applicable Models All models of indoor units Unified ON OFF control Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Malfunction of transmiss...

Page 199: ...tting master controller disconnected Set the group No correctly Replace indoor unit PC board Fix the wiring correctly Fix the wiring correctly Connect the connector correctly Replace the central PC bo...

Page 200: ...licable Models Unified ON OFF control Central controller Schedule timer Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Address duplication of central remote control Im...

Page 201: ...ntrol or schedule timer Fix the wiring correctly Set reset switch to normal Is the power supply turned on for all optional controllers for centralized control Reset power supply simultaneously for all...

Page 202: ...l simultaneously Arrange so that the connector for setting master control is connected to one control for centralized control and reset the power supply for all optional controls for centralized contr...

Page 203: ...transmission wiring Troubleshooting Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred V2844 Caution Is the transmission wiring disconnected or wi...

Page 204: ...suction air temperature of the condenser In heating High suction air temperature of outdoor unit Short circuit High ambient temperature Is the suction air temperature not more than 46 C Is the outdoo...

Page 205: ...temperature of the evaporator In heating Low suction air temperature of indoor unit Short circuit Is the suction air temperature not less than 14 C Is the indoor temperature not less than 14 C Low amb...

Page 206: ...ower supply off 2 With the fan motor connector on motor side disconnected measure the resistance between each pin then make sure that the resistance is more than the value mentioned in the following t...

Page 207: ...Troubleshooting by Indication on the Unified ON OFF Control SiENBE34 703 196 Troubleshooting...

Page 208: ...2 2 1 Outdoor Unit 202 2 2 Field Wiring 203 2 3 Indoor Unit 204 3 Option List 218 3 1 Option List of Controllers 218 3 2 Option List of Outdoor Unit 220 4 Example of Connection 222 5 Thermistor Resist...

Page 209: ...Service port Accumulator Stop valve With service port on field piping side 7 9mm flare connection Service port Four way valve Capillary tube Capillary tube Solenoid valve Solenoid valve Electronic exp...

Page 210: ...ain function 1 Electronic expansion valve Y1E Used for gas superheated degree control while in cooling operation or subcooled degree control while in heating operation 2 Suction air temperature thermi...

Page 211: ...03 200 Appendix FXDQ Refrigerant pipe connection port diameters 4D043864H Gas side Liquid side Filter Fan Indoor heat exchanger Filter Electronic expansion valve mm Model Gas Liquid FXDQ20 25 32 40 50...

Page 212: ...D037995F Indoor heat exchanger To outdoor unit Indoor unit Filter Field piping 9 5C1220T 0 Field piping 15 9C1220T 0 4D034127B Electronic expansion valve Liquid piping connection port Liquid piping co...

Page 213: ...n Operation Pilot Lamp Service monitor green Magnetic contactor Magnetic relay Y1S Magnetic relay Y2S Magnetic relay Y3S Magnetic relay E1HC Magnetic relay Reactor Motor Compressor Motor Fan Power sup...

Page 214: ...m 4 Install circuit breaker for safety 5 All field wiring and components must be provided by licensed electrician 6 Unit shall be grounded in compliance with the applicable local and national codes 7...

Page 215: ...Wiring Diagrams SiENBE34 703 204 Appendix 2 3 Indoor Unit FXCQ20 25 32 63M8...

Page 216: ...SiENBE34 703 Wiring Diagrams Appendix 205 FXCQ40 50 80 125M8V3...

Page 217: ...Wiring Diagrams SiENBE34 703 206 Appendix FXFQ25 32 40 50 63 80 100 125P7VE...

Page 218: ...SiENBE34 703 Wiring Diagrams Appendix 207 FXZQ20 25 32 40 50M8V1...

Page 219: ...ectrical appendices Indoor unit Wired remote control POWER SUPPLY Notes 1 Terminal block Connector Terminal 2 Field wiring 3 In case using central remote control connect it to the unit in accordance w...

Page 220: ...trical appendices Note 5 Input from outside transmission wiring central remote control Wired remote control POWER SUPPLY CONTROL BOX Connector for optional parts Notes 1 Terminal block Connector 2 Fie...

Page 221: ...Wiring Diagrams SiENBE34 703 210 Appendix FXDQ20 25M8V3...

Page 222: ...SiENBE34 703 Wiring Diagrams Appendix 211 FXSQ20 25 32 40 50 63 80 100 125M8V3...

Page 223: ...yellow ORG orange BLU blue BLK Black RED red BRN brown 7 Use copper conductors only Note 4 Input from outside Note 3 transmission wiring central remote control POWER SUPPLY Connector for optional par...

Page 224: ...ELECTRIC PARTS BOX Receiver display unit attached to wireless remote control Optional parts WIRED REMOTE CONTROL OPTIONAL ACCESSORY Connector for optional parts INDOOR UNIT Wired remote control Light...

Page 225: ...n manual and engineering data etc 8 X24A is connected when the wireless remote control kit is being used NOTE 5 INPUT FROM OUTSIDE TRANSMISSION WIRING CENTRAL REMOTE CONTROL POWER SUPPLY SIDE FRONT CO...

Page 226: ...how as follows PNK pink WHT white YLW yellow ORG orange BLU blue BLK black RED red BRN brown 6 Use copper conducters only NOTE 4 INPUT FROM OUTSIDE TRANSMISSION WIRING CENTRAL REMOTE CONTROL POWER SUP...

Page 227: ...et Connector Wireless remote control Connector Interface adapter for sky air series Connector Group control adapter Printed circuit board Printed circuit board Transformer 220 240V 16V Capacitor M1F L...

Page 228: ...or unit s wiring diagram when installing optional parts for the indoor unit 5 Only one indoor unit may be connected to the BEV unit 6 Always use the sky air connection adapter for the indoor unit when...

Page 229: ...chedule timer DST301BA61 12 External control adapter for outdoor unit Must be installed on indoor units DTA104A61 DTA104A62 DTA104A61 DTA104A53 DTA104A61 DTA104A62 DTA104A61 DTA104A61 13 Interface ada...

Page 230: ...1 3 H2 Interface for use in BACnet DMS502B51 Interface unit to allow communications between VRV and BMS Operation and monitoring of air conditioning systems through BACnet communications 3 1 Optional...

Page 231: ...RXYSQ4P7Y1B RXYSQ5P7Y1B RXYSQ6P7Y1B Cool Heat Selector KRC19 26A Fixing box KJB111A Distributive Piping Refnet header KHRP26M22H KHRP26M33H MAX 4 branch MAX 8 branch Refnet joint KHRP26M22T Central dr...

Page 232: ...SiENBE34 703 Option List Appendix 221...

Page 233: ...pipe may be used also as the main pipe Actual pipe length Actual pipe length Difference in height Difference in height Equivalent length Total extension length Between outdoor and indoor units Betwee...

Page 234: ...tion to indoor unit must be the same as the connection size of indoor unit Indoor unit connection pipe size Between refrigerant branch kit and indoor unit Piping between refrigerant branch kits oor an...

Page 235: ...Example of Connection SiENBE34 703 224 Appendix...

Page 236: ...94 52 6 65 6 53 3 56 49 55 08 53 6 41 6 53 4 53 71 52 38 54 6 65 6 53 5 51 09 49 83 55 6 41 6 53 6 48 61 47 42 56 6 18 6 06 7 46 26 45 14 57 5 95 5 84 8 44 05 42 98 58 5 74 5 43 9 41 95 40 94 59 5 14...

Page 237: ...14 71 33 92 33 35 121 7 26 7 16 22 228 05 223 08 72 32 78 32 23 122 7 06 6 97 23 218 24 213 51 73 31 69 31 15 123 6 87 6 78 24 208 90 204 39 74 30 63 30 12 124 6 69 6 59 25 200 00 195 71 75 29 61 29...

Page 238: ...sure High Side MPa PL Detected Pressure Low Side MPa VH Output Voltage High Side VDC VL Output Voltage Low Side VDC PH 1 38V 0 69 PL 0 57V 0 28 PH High pressure MPa VL Low pressure MPa V Voltage V Hig...

Page 239: ...board Check the power semiconductors mounted on the inverter PC board by the use of a multiple tester Items to be prepared 1 Multiple tester Prepare the digital type of multiple tester with diode chec...

Page 240: ...ch value variation The following abnormalities are also doubted besides the PC board abnormality 1 Faulty compressor ground fault ground leakage 1 Faulty fan motor ground leakage Tester terminal Crite...

Page 241: ...Method of Replacing the Inverter s Power Transistors Modules SiBE34 703 230 Appendix...

Page 242: ...4 703 Precautions for New Refrigerant R 410A 231 Part 9 Precautions for New Refrigerant R 410A 1 Precautions for New Refrigerant R 410A 232 1 1 Outline 232 1 2 Refrigerant Cylinders 234 1 3 Service To...

Page 243: ...tropic mixture refrigerant mixture of two or more refrigerants having similar boiling points H3 The design pressure is different at each product Please refer to the installation manual for each produc...

Page 244: ...New Refrigerant R 410A 233 Thermodynamic characteristic of R 410A Temperature C Steam pressure kPa Liquid Vapor Density kg m3 Liquid Vapor Specific heat at constant pressure kJ kgK Liquid Vapor Specif...

Page 245: ...ained in high pressure vessels Although those vessels are durable and strong careless handling can cause damage that can lead to unexpected accidents Do not drop vessels let them fall apply impact or...

Page 246: ...fication differs for R 410A and R 407C Charging cylinder 5 2Weighting instrument used for HFCs Gas detector 5 2The same tool can be used for HFCs Vacuum pump pump with reverse flow preventive function...

Page 247: ...a pipe extension margin of 0 to 0 5mm was provided for flaring For R 410A air conditioners perform pipe flaring with a pipe extension margin of 1 0 to 1 5mm For clutch type only Conventional tool with...

Page 248: ...eed Maximum degree of vacuum 50 l min 50Hz Select a vacuum pump which is able to keep 60 l min 60Hz the vacuum degree of the system in excess of 2 Suction port UNF7 16 20 1 4 Flare 100 7 kPa 5 torr 75...

Page 249: ...ydrogen 5 Refrigerant oil Air compal Specifications 2 Contains synthetic oil therefore it can be used for piping work of every refrigerant cycle 2 Offers high rust resistance and stability over long p...

Page 250: ...le with and without hand operate valve that prevents refrigerant from outflow Differences 2 Pressure proof hose 2 Change in service port diameter 2 Use of nylon coated material for HFC resistance 8 Ch...

Page 251: ...k liquid refrigerant charging 2 A manifold with separate ports for HFCs and previous refrigerants is equipped as standard accessories Differences 2 Measurement is based on weight to prevent change of...

Page 252: ...3 Removal Procedure 241 Part 10 Removal Procedure 1 RXYSQ4 5 6 P7Y1B 240 1 1 Procedure to Remove Outside Panels 240 1 2 Procedure to Remove Propeller Fan and Fan Motor 243 1 3 Procedure to Remove Comp...

Page 253: ...e front panel 2 and then remove the panel after pushing it downward to release the hook To remove the front panel for piping cover remove its one screw To remove the side panel for piping cover remove...

Page 254: ...moving its four screws and releasing its four hooks On the rear side of the front panel 1 a reinforce plate is attached Be careful not to lose it while removing the front panel 1 7 Remove the front pa...

Page 255: ...changer cover Remove the heat exchanger cover after releasing its three hooks with a minus driver 9 Remove the ambient air temperature thermistor after pulling it to the near side and sliding to the r...

Page 256: ...r 10 minutes or more elapsed from all power supplies have been turned off Step Procedure Points Preliminary preparation Remove the discharge grill front panel and front panel for piping cover accordin...

Page 257: ...motor lead wires are not fixed by using the clamp material it may always damage the lead wire because the lead wires twined around the fan When mounting the propeller fan make the D cut correspond to...

Page 258: ...s electrical component and compressor fixing panel according to the Procedure to Remove Outside Panels 1 Pull off the lead wire of compressor 1 Open upward the sound insulation for the terminal cover...

Page 259: ...e sound insulation for the compressor 5 Remove the crankcase heater under the compressor Pull the spring to trip the catch 6 Remove the three fixing bolts of the compressor You can see the far side fi...

Page 260: ...er being cut using a pipe cutter before replacing with a new compressor 7 Cut off the suction pipe discharge pipe and unloader pipe of compressor with a pipe cutter three places Suction pipe portion U...

Page 261: ...RXYSQ4 5 6 P7Y1B SiENBE34 703 250 Removal Procedure...

Page 262: ...nd Functional Parts Outdoor Unit 34 Electronic Expansion Valve PI Control 43 Error of External Protection Device 122 Excessive Number of Indoor Units 175 F F3 147 F6 148 Fan Motor M1F Lock Overload 12...

Page 263: ...Board 162 Malfunction of Transmission between Main and Sub Remote Controls 172 Malfunction of Transmission between Optional Controllers for Centralized Control 183 Malfunction of Transmission between...

Page 264: ...urrent abnormal 160 inverter protection control 55 inverter start up error 161 L louver control for preventing ceiling dirt 59 low pressure drop due to refrigerant shortage or electronic expansion val...

Page 265: ...R refrigerant circuit 36 refrigerant overcharged 148 remote control self diagnosis function 115 remote control service mode 113 S self diagnosis by wired remote control 109 self diagnosis by wireless...

Page 266: ...compiled the content of this publication 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...

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