Daikin VRV II-Q RQYQ8-48PY1B Service Manual Download Page 143

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SiBE341027

Troubleshooting by Remote Controller

Service Diagnosis

133

Note:

*1. Voltage measurement point

Refer to P.191

Outdoor unit PCB (A1P)

+5V

GND

Micro-computer
A/D input

Make measurement of DC
voltage between these wires.

X31A

(4)

(3)

(2)

(1)

Red

Black

White

res

sure

nsor

Connector for low
pressure sensor

CHECK 12

Summary of Contents for VRV II-Q RQYQ8-48PY1B

Page 1: ...Heat Pump R 410A 50Hz RQYQ8 48PY1B SiBE341027...

Page 2: ...door Units 6 4 Capacity Range 7 5 Features 9 5 1 Introduction 9 5 2 Benefits of System Replacement 10 5 3 Procedure of Reuse of Existing Piping 12 5 4 Guidelines for Reuse of Existing Refrigerant Pipi...

Page 3: ...Motor Overcurrent Lock 112 2 8 Outdoor Unit Fan Motor Abnormality 113 2 9 Electronic Expansion Valve Coil Abnormality Y1E Y3E 116 2 10 Abnormal Discharge Pipe Temperature 118 2 11 Humidity Alarm 120 2...

Page 4: ...rror between Main and Sub Remote Controllers 166 2 37 Transmission Error between Indoor and Outdoor Units in the Same System 167 2 38 Improper Combination of Indoor and Outdoor Units Indoor Units and...

Page 5: ...er 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 shock If it is necessary to supp...

Page 6: ...ctrical shock Do not clean the air conditioner by splashing water Washing the unit with water may cause an electrical shock Be sure to provide the grounding when repairing the equipment in a humid or...

Page 7: ...at 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 ter...

Page 8: ...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 9: ...sure 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 onl...

Page 10: ...Q 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 t...

Page 11: ...ir Treatment Equipment 3 2 External Appearance 4 2 1 Indoor Units 4 2 2 Outdoor Units 5 2 3 Air Treatment Equipment 5 3 Combination of Outdoor Units 6 4 Capacity Range 7 5 Features 9 5 1 Introduction...

Page 12: ...Capacity index 20 25 31 25 40 50 62 5 80 100 125 140 200 250 Ceiling Mounted Cassette Type Round Flow FXFQ 25P9 32P9 40P9 50P9 63P9 80P9 100P9 125P9 VEB Ceiling Mounted Cassette Compact Multi Flow Ty...

Page 13: ...e 220 240 220V 50 60Hz V1 1 phase 220 240V 50Hz Series Model Name Power Supply Heat Pump RQYQ 8P 10P 12P 14P 16P 18P 20P Y1B 22P 24P 26P 28P 30P 32P 34P 36P 38P 40P 42P 44P 46P 48P Series Model name P...

Page 14: ...CQ80M8V3B FXCQ125M8V3B Wall mounted type FXAQ20PV1 FXAQ25PV1 FXAQ32PV1 FXAQ40PV1 FXAQ50PV1 FXAQ63PV1 Ceiling mounted cassette corner type FXKQ25MAVE FXKQ32MAVE FXKQ40MAVE FXKQ63MAVE Floor standing typ...

Page 15: ...th DX coil and humidifier GM HRV units VAM series VAM150FAVE VAM250FAVE VAM350FAVE VAM500FAVE VAM650FAVE VAM800FAVE VAM1000FAVE VAM1500FAVE VAM2000FAVE 8 10 12HP 14 16HP 18 20 22 24HP 26 28HP 30 32HP...

Page 16: ...nal Daikin Outdoor Unit Multi Connection Piping Kit is required System Capacity Number of units Module Outdoor Unit Multi Connection Piping Kit Option 8 10 12 14 16 8HP 1 10HP 1 12HP 1 14HP 1 16HP 1 1...

Page 17: ...HP Capacity index Model name Combination Outdoor unit multi connection piping kit 1 Total capacity index of connectable indoor units 2 3 Maximum number of connectable indoor units Combination 50 100 1...

Page 18: ...QYQ8PY1B 50 130 13 10 250 RQYQ10PY1B 16 12 300 RQYQ12PY1B 19 14 350 RQYQ14PY1B 22 16 400 RQYQ16PY1B 26 Double outdoor units 18 450 RQYQ18PY1B 29 20 500 RQYQ20PY1B 32 22 550 RQYQ22PY1B 35 24 600 RQYQ24...

Page 19: ...mooth replacement of air conditioning with less effect on operations and users in the building Installation process for replacement with Refrigerant recovery and units removal Refrigerant recovery and...

Page 20: ...e Installation space Compact design enables the effective use of space taken up by existing machinery Significantly more compact outdoor unit enables the effective use of limited space Design flexibil...

Page 21: ...ple to deploy even in long wide buildings with many small rooms Pipe size 28 6 12 7 Pipe size 28 6 12 7 Before replacement After replacement 10 HP VRV III Q for replacement use enables the system capa...

Page 22: ...ster oil Check whether the pipe size piping length actual equivalent length height difference design pressure of local piping 3 3MPa or more are within the range of operational conditions Also check t...

Page 23: ...wire with 0 75 to 1 25 mm2 for the cool heat selector New wiring work is needed Check the voltage the number of phases and breaker capacity of the existing power supply When using the existing power s...

Page 24: ...Use the insulation of both liquid and gas pipes When replacing K A series or previous version please confirm piping is insulation of both liquid and gas pipes Refrigerant oil SUNISO MS HAB Barrel Fre...

Page 25: ...r grade O type 1 2H type in the table indicate the material types specified in JIS H3300 In case of bending O material set the round bending to 3xD or more D Outer Diameter 1 2H materials are calculat...

Page 26: ...X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X...

Page 27: ...SiBE341027 Specifications 17 Part 2 Specifications 1 Specifications 18 1 1 Outdoor Units 18...

Page 28: ...otor Output Number of Units kW 4 5 1 1 4 4 5 1 Starting Method Soft Start Soft Start Fan Type Propeller Fan Propeller Fan Motor Output kW 0 75 1 0 75 1 Airflow Rate m min 180 185 Drive Direct Drive Di...

Page 29: ...ut Number of Units kW 3 3 4 5 1 1 6 4 5 4 5 1 Starting Method Soft Start Soft Start Fan Type Propeller Fan Propeller Fan Motor Output kW 0 75 1 0 35 2 Airflow Rate m min 200 233 Drive Direct Drive Dir...

Page 30: ...aled Scroll Type Displacement m h 13 34 10 53 10 53 Number of Revolutions r min 6300 2900 2900 Motor Output Number of Units kW 2 7 4 5 4 5 1 Starting Method Soft Start Fan Type Propeller Fan Motor Out...

Page 31: ...r min 7980 6300 2900 7980 6300 2900 Motor Output Number of Units kW 4 5 1 1 4 4 5 1 4 5 1 3 3 4 5 1 Starting Method Soft Start Soft Start Fan Type Propeller Fan Propeller Fan Motor Output kW 0 75 1 0...

Page 32: ...min 6300 2900 6300 2900 6300 2900 6300 2900 Motor Output Number of Units kW 1 4 4 5 1 3 3 4 5 1 3 3 4 5 1 3 3 4 5 1 Starting Method Soft Start Soft Start Fan Type Propeller Fan Propeller Fan Motor Ou...

Page 33: ...in 6300 2900 6300 2900 2900 6300 2900 6300 2900 2900 Motor Output Number of Units kW 1 4 4 5 1 2 7 4 5 4 5 1 3 3 4 5 1 2 7 4 5 4 5 1 Starting Method Soft Start Soft Start Fan Type Propeller Fan Propel...

Page 34: ...6300 2900 2900 6300 2900 2900 6300 2900 2900 6300 2900 2900 Motor Output Number of Units kW 1 6 4 5 4 5 1 2 7 4 5 4 5 1 2 7 4 5 4 5 1 2 7 4 5 4 5 1 Starting Method Soft Start Soft Start Fan Type Prop...

Page 35: ...0 2900 6300 2900 6300 2900 2900 6300 2900 6300 2900 6300 2900 2900 Motor Output Number of Units kW 1 4 4 5 1 1 4 4 5 1 1 6 4 5 4 5 1 1 4 4 5 1 1 4 4 5 1 2 7 4 5 4 5 1 Starting Method Soft Start Soft S...

Page 36: ...0 2900 6300 2900 6300 2900 2900 6300 2900 6300 2900 6300 2900 2900 Motor Output Number of Units kW 1 4 4 5 1 3 3 4 5 1 2 7 4 5 4 5 1 3 3 4 5 1 3 3 4 5 1 2 7 4 5 4 5 1 Starting Method Soft Start Soft S...

Page 37: ...2900 6300 2900 2900 6300 2900 2900 6300 2900 6300 2900 2900 6300 2900 2900 Motor Output Number of Units kW 1 4 4 5 1 2 7 4 5 4 5 1 2 7 4 5 4 5 1 3 3 4 5 1 2 7 4 5 4 5 1 2 7 4 5 4 5 1 Starting Method...

Page 38: ...900 2900 6300 2900 2900 6300 2900 2900 6300 2900 2900 6300 2900 2900 6300 2900 2900 Motor Output Number of Units kW 1 6 4 5 4 5 1 2 7 4 5 4 5 1 2 7 4 5 4 5 1 2 7 4 5 4 5 1 2 7 4 5 4 5 1 2 7 4 5 4 5 1...

Page 39: ...ant Circuit 1 Refrigerant Circuit 30 1 1 RQYQ8PY1B 30 1 2 RQYQ10 12PY1B 32 1 3 RQYQ14 16PY1B 34 2 Functional Parts Layout 36 2 1 RQYQ8PY1B 36 2 2 RQYQ10 12PY1B 37 2 3 RQYQ14 16PY1B 38 3 Refrigerant Fl...

Page 40: ...ssure sensor Used to detect low pressure 22 S1PH High pressure switch For INV In order to prevent the increase of high pressure when a malfunction occurs this switch is activated at high pressure of 4...

Page 41: ...SOLENOID VALVE CHECK VALVE CHECK VALVE SOLENOID VALVE PRESSURE SENSOR HIGH LIQUID PIPE FUSIBLE PLUG REFRIGERANT REGULATOR SOLENOID VALVE CHECK VALVE CHECK VALVE CHECK VALVE SOLENOID VALVE SOLENOID VAL...

Page 42: ...re of liquid pipe 22 S1NPL Low pressure sensor Used to detect low pressure 23 S1PH High pressure switch For INV In order to prevent the increase of high pressure when an error occurs this switch is ac...

Page 43: ...ALVE HIGH PRESSURE SENSOR SOLENOID VALVE CHECK VALVE ELECTRONIC EXPANSION VALVE PRESSURE REGULATING VALVE ABSOLUTE PRESSURE TYPE SOLENOID VALVE FUSIBLE PLUG ELECTRONIC EXPANSION VALVE DOUBLE PIPE HEAT...

Page 44: ...pressure 25 S1PH High pressure switch For INV In order to prevent the increase of high pressure when an error occurs this switch is activated at high pressure of 4 0 MPa or more to stop the compresso...

Page 45: ...HECK VALVE SOLENOID VALVE OIL SEPARATOR OIL SEPARATOR OIL SEPARATOR HIGH PRESSURE SWITCH HIGH PRESSURE SWITCH HIGH PRESSURE SWITCH SOLENOID VALVE SOLENOID VALVE HIGH PRESSURE SENSOR CAPILLARY TUBE PIP...

Page 46: ...changer outlet R5T Solenoid valve Receiver gas vent Y8S Inverter fan M1F Four way valve Heat exchanger Y3S Thermistor Receiver liquid level R2T Solenoid valve Bypass Y2S High pressure sensor Liquid pi...

Page 47: ...valve Hot gas Y1S Thermistor Refrigerant regulator liquid pipe R4T High pressure switch For STD 1 S2PH Thermistor Outdoor air R1T High pressure switch For INV S1PH Crankcase heater E2HC Standard comp...

Page 48: ...ator liquid pipe Y12S Solenoid valve Oil regulator outlet Y9S High pressure sensor S1NPH Low pressure sensor S1NPL High pressure switch For STD 2 S3PH Thermistor Outdoor air R1T High pressure switch F...

Page 49: ...R ABSOLUTEPRESSURETYPE PRESSUREREGULATINGVALVE M FAN SV HEAT EXCHANGER M FAN LIQUID PIPE LIQUID PIPE FOUR WAY VALVE S4PH S1NPH SV CHECKVALVE CHECK VALVE CHECK VALVE FILTER FILTER FILTER FILTER SV S3PH...

Page 50: ...WAY VALVE S4PH S1NPH SV CHECKVALVE CHECK VALVE CHECK VALVE FILTER FILTER FILTER FILTER SV S3PH S2PH S1PH FILTER FILTER FILTER SV SV S1NPL COMPRESSOR COMPRESSOR COMPRESSOR STD2 INV STD1 GAS PIPE FILTER...

Page 51: ...HEAT EXCHANGER M FAN LIQUID PIPE LIQUID PIPE FOUR WAY VALVE S4PH S1NPH SV CHECKVALVE CHECK VALVE CHECK VALVE FILTER FILTER FILTER FILTER SV S3PH S2PH S1PH FILTER FILTER FILTER SV SV S1NPL COMPRESSOR C...

Page 52: ...art 4 Function 1 Function General 43 1 1 Operation Mode 43 2 Detailed Control Functions 44 2 1 Stop Operation 44 2 2 Standby 44 2 3 Startup Control 45 2 4 Normal Operation 46 2 5 Protection Control 51...

Page 53: ...rmal Operation 2 Compressor PI Control 4 Compressor Step Control 5 Electronic Expansion Valve PI Control 6 Step Control of Outdoor Unit Fans 3 Outdoor Unit Rotation 1 Oil Return Operation 2 Defrost Op...

Page 54: ...and piping switch retain the condition before they were stopped 2 2 Standby 2 2 1 Restart Standby Used to forcedly stop the compressor for a period of 5 minutes in order to prevent the frequent ON OF...

Page 55: ...l in Heating Operation Ending conditions OR A lapse of 130 sec Tc 48 C Pe 0 54Pa Pc Pe 0 4MPa 0 Hz 0 pls Step 4 52 Hz 0 pls 10 sec Ta 20 C OFF Ta 20 C Step 4 1 Step 15 sec when Pc 2 2 MPa 1 Step 15 se...

Page 56: ...oid valve Receiver gas vent Y8S Y8S Y8S OFF OFF Solenoid valve Circuit of oil return Y5S Y5S Y5S ON ON Solenoid valve Close liquid pipe for stopped outdoor unit Y6S Y6S Y6S OFF ON Solenoid valve Main...

Page 57: ...operating frequency etc On multi outdoor unit systems this control is made according to values of the first priority unit which is detected with the pressure sensor Heating operation Controls compress...

Page 58: ...section are the names for installation They are determined in installation work and not changed thereafter These names are different from master unit and slave unit for control The outdoor unit conne...

Page 59: ...Hz ON 28 104Hz ON 29 116Hz ON 30 124Hz ON 31 133Hz ON 32 143Hz ON 33 158Hz ON 34 177Hz ON 35 189Hz ON 36 202Hz ON 37 210Hz ON RQYQ14 16PY1B STEP No INV STD1 STD2 1 52Hz OFF OFF 2 57Hz OFF OFF 3 62Hz O...

Page 60: ...re or capacity precedence mode Control at a low outdoor temperature during cooling Secure the liquid pressure and circulating rate in the indoor unit through high pressure control with the outdoor fan...

Page 61: ...FF INV compressor 52 Hz Pc 3 64 MPa Restart standby 2 times per 30 minutes at max Stop due to error E3 displayed HPS 4 0 MPa is activated INV compressor 3 step down INV compressor 1 step up Pc 3 47 MP...

Page 62: ...erformed in the entire system Normal operation All STD compressors stop Solenoid valve hot gas Y1S ON Restart standby 3 times per 60 minutes at max Stop due to error E4 displayed Pe 0 34 MPa 1 0 20 MP...

Page 63: ...ressor 2 OFF STD compressor 1 OFF Solenoid valve hot gas Y1S ON Restart standby 3 times per 60 minutes at max Stop due to error E4 displayed Low pressure standby 4 times per 60 minutes at max Pe 0 12...

Page 64: ...C HTdi 120 C continues for 10 minutes Normal operation INV compressor 1 step down Compressor 62Hz ON OFF Compressor 62Hz OFF OFF Restart standby 10 minutes 2 times per 100 minutes at max Stop due to e...

Page 65: ...the following sequence INV Comp 1 step down INV Comp 1 step up INV current value 26 5 A After 15 sec INV current value 27 6A continues for 260 seconds Restart standby 3 times per 60 min at max 4 time...

Page 66: ...ontrol is used to prevent abnormal heating due to overcurrent to the compressor resulting from failures of STD compressor such as locking STD compressor ON CT detection current value 28 8A Demand to o...

Page 67: ...unit fan M1F M1F M1F M2F Fan control in normal cooling Heat exchanging mode Four way valve Y3S Y3S Y3S OFF Electronic expansion valve Main Y1E Y1E Y1E 480 pls Electronic expansion valve Main 2 Y2E El...

Page 68: ...expansion valve Main Y1E Y1E Y1E 480 pls Electronic expansion valve Main 2 Y2E Electronic expansion valve Subcooling Y2E Y2E Y3E 0 pls Solenoid valve Hot gas Y1S Y1S Y1S ON Solenoid valve Receiver ga...

Page 69: ...way valve Y3S Y3S Y3S OFF Electronic expansion valve Main Y1E Y1E Y1E 480 pls Electronic expansion valve Main 2 Y2E Electronic expansion valve Subcooling Y2E Y2E Y3E 0 pls Solenoid valve Hot gas Y1S Y...

Page 70: ...t Operation Part 5 Test Operation 1 Test Operation 61 1 1 Procedure and Outline 61 1 2 Check Operation 64 1 3 Checking in Normal Operation 67 2 Field Setting from Outdoor Unit 68 2 1 Field Setting fro...

Page 71: ...aken against decreased insulation resistance in the compressor If the compressor is left to stand for an extended period of time after the refrigerant charge with the stop valve open and the power sup...

Page 72: ...door unit capacity Model A B kg C kg 100 100 RQYQ 8PY1B 1 00 6 8kg 0 0kg 0 0kg 10PY1B 7 9kg 12PY1B 9 3kg 14 16PY1B 14 1kg R Total length of 22 2 mm liquid pipe 0 37 Total length of 9 5 mm liquid pipe...

Page 73: ...ield settings with outdoor unit PCB LED display Default status before delivery Micro computer operation monitor MODE HAP l l l l l H1P h h h h h H2P h h h h h H3P k k h h h H4P h h h h h H5P h h h h h...

Page 74: ...tting mode 1 verify that LED H2P is off normal If H2P is on error use the remote control to check the details of the error and correct the trouble The system is checking for indoor unit errors If H2P...

Page 75: ...LED display is normal press the TEST button BS4 again h l h h k k h h l h h k k k h l h k h h h Waits for conditions to stabilize after restart Contamination operation 30 60 minutes Up to 1 hour may...

Page 76: ...r unit system has been connected in a multi outdoor unit system Change to individual piping and disconnect the wiring from the multi outdoor unit terminals Q1 Q2 U9 There is trouble at another indoor...

Page 77: ...hen checking normal operation If any abnormal noise occurs due to liquid compression in the compressor or another cause stop operation immediately Then energize the crankcase heater for a sufficient p...

Page 78: ...ing to ON with No 29 B The low noise operation aforementioned is enabled in low night noise operation mode Start time Possible to select in the range of 20 00 to 24 00 hours End time Possible to selec...

Page 79: ...etting mode 2 to NONE 7 Emergency operation If the compressor has a failure used to prohibit the operation of compressor s concerned or outdoor unit s concerned and to conduct emergency operation of t...

Page 80: ...se of a Cool Heat selector equipped with the outdoor unit OFF Factory setting of spare PCB COOL HEAT select setting is not made with the use of a Cool Heat selector equipped with the outdoor unit DS1...

Page 81: ...dify the operating status and to set program addresses etc Usually used in servicing the system e Monitor mode H1P blinks Used to check the program made in Setting mode 2 Mode changing procedure 1 LED...

Page 82: ...press the MODE BS1 button to set the system to Setting mode 1 Normally Setting mode 1 is set In case of other status press MODE BS1 button one time and set to Setting mode 1 Check the system for each...

Page 83: ...Refrigerantrecovery vacuuming mode setting Sets to refrigerant recovery or vacuuming mode 22 Low night noise setting Sets automatic low night noise operation in a simple way The operating time is base...

Page 84: ...ny defective part in multi outdoor unit system Since the comfortable environment is extremely impaired prompt replacement of the part is required 39 Emergency operation Setting for the slave unit 1 an...

Page 85: ...k h h h Low Level L khhh hhk Normal Level M khhh hkh High khhh hkk High khhh khh High Level H khhh khk High khhh kkh High khhh kkk 9 Tc setting k h h k h h k Low khhh hhk Normal khhh hkh High khhh khh...

Page 86: ...acity priority setting k h k k k h k OFF khhh hhk ON khhh hkh 30 Demand setting 1 k h k k k k h 60 demand khhh hhk 70 demand khhh hkh 80 demand khhh khh 32 Normal demand setting k k h h h h h OFF khhh...

Page 87: ...l h h h k k h 7 Number of connected zone units Fixed to 0 l h h h k k k 8 Number of outdoor units 2 l h h k h h h 11 Number of zone units l h h k h k k 12 Number of terminal units 3 l h h k k h h Low...

Page 88: ...ws The No 1 cool heat unified address is expressed as a binary number consisting of the lower 6 digits 0 63 In c the address is 010110 binary number which translates to 16 4 2 22 base 10 number In oth...

Page 89: ...ultaneously in accordance with unified master outdoor unit by cool heat select remote controller g Set cool heat at all outdoor unit systems simultaneously for each outdoor unit external control adapt...

Page 90: ...not there is outdoor outdoor unit wiring Set outdoor unit PCB DS1 1 to OUT factory setting Set C H select to IND individual for Setting mode 1 factory setting MODE C H SELECT IND MASTER TEST DEMAND L...

Page 91: ...control adaptors for outdoor unit are used and cool heat is selected for each external control adaptor for outdoor unit use setting mode 2 and set DS1 and DS2 on the external control adaptors for outd...

Page 92: ...is selected for each external control adaptor for outdoor unit use setting mode 2 and set DS1 and DS2 on the external control adaptors for outdoor unit and the unified cool heat address on the outdoor...

Page 93: ...0 Outdoor unit unified slave No 0 External control adaptor for outdoor unit No 2 C H unified address Outdoor unit unified master No 2 Outdoor unit unified slave No 2 Outdoor unit unified slave No 2 Ex...

Page 94: ...l adaptor for outdoor unit C H SELECT C H SELECT C H SELECTOR IND MASTER SLAVE MODE TEST L N O P DEMAND CENTRAL C H SELECTOR OFF ON BOTH C H DE FUNCTION CENTRAL NO TERMINAL ADDRESS C H OUT MULTI OUT I...

Page 95: ...rmal operation mode B When the low noise operation is carried out automatically at night The external control adaptor for outdoor unit is not required 1 While in Setting mode 2 select the setting cond...

Page 96: ...d out Use of the external control adaptor for outdoor unit is not required 1 While in Setting mode 2 make setting of the set item No 32 Setting of alternate demand to ON 2 While in Setting mode 2 sele...

Page 97: ...ted Operation procedure c In setting mode 2 with units in stop mode set Refrigerant recovery Vacuuming mode to ON The respective expansion valve of indoor and outdoor units are fully opened and some o...

Page 98: ...ess the SET button BS2 19 times 3 Press the RETURN button BS3 once 4 Press the SET button BS2 once 5 Press the RETURN button BS3 twice 6 Press the MODE button BS1 once In order to set the STD 2 compre...

Page 99: ...DE button BS1 for a period of 5 seconds or more 2 Press the SET button BS2 38 times 3 Press the RETURN button BS3 once 4 Press the SET button BS2 once 5 Press the RETURN button BS3 twice 6 Press the M...

Page 100: ...or Abnormality 132 2 20 Inverter PCB Abnormality 134 2 21 Inverter Radiation Fin Temperature Rise 136 2 22 Momentary Overcurrent of Inverter Compressor 137 2 23 Overcurrent Abnormal of Inverter Compre...

Page 101: ...1027 Service Diagnosis 91 2 40 Transmission Error between Centralized Controller and Indoor Unit 173 2 41 System is not Set yet 176 2 42 System Error Refrigerant System Address Undefined 177 2 43 Chec...

Page 102: ...These symptoms indicate that the system is controlled so as not to put unreasonable loads on the system Normal operation The system will automatically start operation after a lapse of five minutes Pr...

Page 103: ...L 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 Normal operation 9...

Page 104: ...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 Dus...

Page 105: ...used operation to stop Refer to P 99 for error code and error contents Note 1 Pressing the INSPECTION TEST button will blink the check indication 2 While in service mode holding down the ON OFF button...

Page 106: ...rective action Operation Status Display Abnormal shutdown The system stops operating The operation lamp green starts to blink The message Error Press Menu button will appear and blink at the bottom of...

Page 107: ...til a buzzer remains ON The continuous buzzer indicates that the error code is confirmed Continuous beep No abnormality 3 Press the MODE selector button The left 0 upper digit indication of the error...

Page 108: ...ressed 1 Press INSPECTION TEST button If no button is pressed for 1 minute equipment returns to normal status When MODE selector button is pressed or no button is pressed for 1 minute equipment return...

Page 109: ...mality 130 JC l Low pressure sensor abnormality 132 L1 l Inverter PCB abnormality 134 L4 l Inverter radiation fin temperature rise 136 L5 l Momentary overcurrent of inverter compressor 137 L8 l Overcu...

Page 110: ...er compressor motor lock INV compressor lock detected E5 STD compressor motor overcurrent Lock STD 1 E6 STD 2 Outdoor unit fan motor abnormality Defective fan motor 1 E7 Defective fan motor 2 Electron...

Page 111: ...h l l k h h h h h l k k h h l k h h h h h l k k h l l k h h h h h l k k l h F3 l l h h l h l l h k h h l l l k h h h h h l k k h h F6 l h k h l l h l k h h h h h l k k h h l l H3 l l h h l h h 1 H7 l...

Page 112: ...B INV transmission data abnormality LC INV transmission abnormality Inverter over ripple protection Unbalanced INV power supply voltage P1 INV radiation fin thermistor and related abnormality INV fin...

Page 113: ...h h U0 l l h l h h h l h k h h h h l k h h h h h l k k h h l l U1 l h k h h h l l k h h h h h l k k h h l l l k h h h h h l k k h h l l U2 l h k h h l h l k h h h h h l k k h h l l l k h h h h h l k k...

Page 114: ...ion between the indoor unit and the outdoor unit are not normal Supposed Causes Defective outdoor unit PCB A1P Defective connection of inside outside relay wires Troubleshooting Caution Be sure to tur...

Page 115: ...witch 4 0MPa Operating pressure of pressure switch 3 3MPa Supposed Causes Defective high pressure sensor Defective connection of connector for high pressure switch or pressure switch Defective high pr...

Page 116: ...nd pressure switch Error Decision Conditions When the contact of the high pressure switch or pressure switch opens Reference Operating pressure of high pressure switch Operating pressure 4 0MPa Reset...

Page 117: ...eration using the remote controller and then restart the operation NO NO NO NO NO YES YES NO NO YES YES YES YES Rectify defective points if any Replace the high pressure switch and pressure switch Rep...

Page 118: ...etection Abnormality is detected by the pressure value of the low pressure sensor with the outdoor unit main PCB A1P Error Decision Conditions Error is generated when the low pressure is dropped under...

Page 119: ...1 Mount a pressure gauge on the low pressure service port 2 Reset the operation using the remote controller and then restart the operation Are the characteristics of the low pressure sensor normal 1...

Page 120: ...om UVW line connected between the inverter and compressor and the error is detected when any abnormality is observed in the phase current waveform Error Decision Conditions This error will be output w...

Page 121: ...pressure not less than 0 5 MPa CHECK 4 Is the power transistor normal NO YES NO YES NO YES NO YES YES NO YES YES NO NO NO YES YES YES NO NO YES NO Local factor Open the stop valve Replace the relay w...

Page 122: ...ering due to rough MgS contact 2 Abnormal case The current sensor value is 0 during STD compressor operation The current sensor value is more than 15 0A during STD compressor stop Is the stop valve op...

Page 123: ...cted by hole IC during the fan motor operation Error Decision Conditions Overcurrent is detected for inverter PCB A4P or fan inverter PCB A5P or A7P System down is caused by 4 times of detection In th...

Page 124: ...t PCB Check in the monitor mode Turn OFF the power supply and wait for 10 minutes Fan motor1 relay connector X1A X2A or X1A X2A of compressor INV PCB Fan motor1 2 relay connector X3A X4A or X1A X2A of...

Page 125: ...ses of fan motorisoutofbalance or short circuit between UVW phases CHECK 3 Check fan motor connector signal wire The signal wire short circuits between Vcc and GND and between UVW and GND Put the powe...

Page 126: ...licable Models RQYQ PY1B Method of Error Detection Check the continuity of electronic expansion valve coil Y1E Error Decision Conditions No current is detected in the common COM when power supply is O...

Page 127: ...monitor mode When confirmation of error 3 and 4 shows as follows Electronic expansion valve for main Y1E When confirmation of error 3 and 4 shows as follows Electronic expansion valve for refrigerant...

Page 128: ...detected according to the temperature detected by the discharge pipe temperature sensor Error Decision Conditions When the discharge pipe temperature rises to an abnormally high level 135 C or more Wh...

Page 129: ...ormal Actually the temperature of discharge pipe is high CHECK 3 Remove the factor of overheat operation Connect the service checker to compare the temperature of discharge pipe by using service check...

Page 130: ...etected by the temperature and pressure of any part during the cooling operation Error Decision Conditions When the following humidity condition continues for 30 minutes Supposed Causes Defective suct...

Page 131: ...Replace the suction pipe thermistor Replace the discharge pipe thermistor Check if high pressure sensor property is normal The liquid pipe temperature is low equivalent to the evaporating temperature...

Page 132: ...arge Disconnection of outdoor air thermistor Disconnection of heat exchanger deicer thermistor Disconnection of liquid pipe thermistor Troubleshooting Refer to P 189 Caution Be sure to turn off power...

Page 133: ...ure to turn off power switch before connect or disconnect connector or parts damage may be occurred Wait for 10 minutes after unit stops then check the following Is there continuity at the lead wire R...

Page 134: ...ay H7 Applicable Models RQYQ PY1B Method of Error Detection Detection of abnormal signal from fan motor Error Decision Conditions In case of detection of abnormal signal at starting fan motor Supposed...

Page 135: ...lows Fan motor 1 M1F When confirmation of error 3 shows as follows Fan motor M2F Explanation for Master unit Slave unit 1 Slave unit 2 System Turn OFF the power supply Is the signal wire connector for...

Page 136: ...A R1T X18A R1T X18A J3 Discharge pipe thermistor R3T X29A R31T X29A R31T X29A R32T R32T R33T J5 Suction pipe thermistor R8T X11A R8T X11A R8T X11A J6 Heat exchanger deicer thermistor R9T X12A R9T X12A...

Page 137: ...code Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Replace the outdoor unit sub PCB A2P Replace the high pressure sensor YES NO Replac...

Page 138: ...SiBE341027 128 Service Diagnosis 2 Voltage measurement point Refer to P 191 Outdoor unit PCB A1P Connector for high pressure sensor Red Red Black White GND Micro computer A D input Measure DC voltage...

Page 139: ...ensor mounted on the T phase A6P and R phase A8P wire Are the current sensors inversely connected to two STD compressors Is the connector for current sensor connected to X25A X26A on outdoor unit PCB...

Page 140: ...ection Error is detected from the pressure detected by the high pressure sensor Error Decision Conditions When the high pressure sensor is short circuit or open circuit Not less than 4 22MPa or 0 01MP...

Page 141: ...high pressure gauge 2 Connect the checker for VRV IfthePCB pressuredetection normal Makea comparison betweenthechecker pressure dataand the voltage characteristics 2 Reset the operation and then rest...

Page 142: ...ive connection of low pressure sensor Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Arethecharacteristicsofthelow pres...

Page 143: ...iagnosis 133 Note 1 Voltage measurement point Refer to P 191 Outdoor unit PCB A1P 5V GND Micro computer A D input Make measurement of DC voltage between these wires X31A 4 3 2 1 Red Black White Low pr...

Page 144: ...t before compressor startup Detect error by current sensor value during synchronized operation at the time of startup Error Decision Conditions When over current is detected at the time of waveform ou...

Page 145: ...d that the error results from external causes other than failures e g exogenous noises or thunder Is the individual system applied to the outdoor unit Multi system Individual system While in monitor m...

Page 146: ...ulty radiation from the power unit Blocked air suction port Stained radiation fin High outdoor air temperature NO NO YES NO YES The radiation fin of the inverter PCB concerned exceeded a temperature o...

Page 147: ...Y1B Method of Error Detection Error is detected from the current flowing in the power transistor Error Decision Conditions When an excessive current 59 1A flows in the power transistor Instantaneous o...

Page 148: ...ressor lead wires normal Are the wiring and connection to the compressor normal Is the insulation resistance of the compressor 100 k or less Compressor coils are disconnected CHECK 4 Is the power tran...

Page 149: ...Method of Error Detection Error is detected from the current flowing in the power transistor Error Decision Conditions When the inverter secondary current value is below 1 33 5A and over continues for...

Page 150: ...ssor coils are disconnected CHECK 4 Is the power transistor normal Error code L8 is displayed again Power OFF NO NO NO YES YES NO YES NO Open the stop valve Replace the compressor lead wires Correct t...

Page 151: ...sure to turn off power switch before connect or disconnect connector or parts damage may be occurred YES Go on to the next page Starting failure due to aged operation NO Is it the initial time to sta...

Page 152: ...al NO Cancel the melting state of refrigerant Refrigerant is melting in refrigerant oil The unit is out of power supply for more than 6 hours Is the insulation resistance of the compressor 100k or mor...

Page 153: ...state between inverter PCB and main PCB by micro computer Error Decision Conditions When the transmission is not carried out in a specified period of time or longer Supposed Causes Incorrect transmis...

Page 154: ...S NO NO NO YES The LC error recurs Not the LC error Check the error code again Replace the main PCB A1P Replace the inverter PCB A4P YES Are the connectors of the main PCB and inverter PCB all securel...

Page 155: ...y voltage is detected in PCB Error Decision Conditions When the amplitude of the ripple exceeding 6V is detected Error is not decided while the unit operation is continued P1 will be displayed by pres...

Page 156: ...are many cases where it gets unbalanced during night time around 6 00PM to 10 00PM Using a device capable of constant recording of power supply voltage record power supply voltage between 3 phases R S...

Page 157: ...ng the inspection button Supposed Causes Defective radiation fin thermistor Defective inverter PCB Defective inverter compressor Defective fan motor Troubleshooting Caution Be sure to turn off power s...

Page 158: ...Defective or no field setting after replacing main PCB Troubleshooting YES Replace the outdoor unit main PCB YES YES YES NO Caution Be sure to turn off power switch before connect or disconnect conne...

Page 159: ...nger Error Decision Conditions In cooling mode Low pressure becomes 0 1MPa or less In heating mode The degree of superheat of suction gas becomes 20 degrees or more SH Ts1 Te Ts1 Temperature detected...

Page 160: ...changer thermistor R9T normal 3 Is the low pressure 0 1MPa or less 1 Is the characteristics of low pressure sensor normal 2 Replace the low pressure sensor Replace the outdoor unit main PCB A1P Cautio...

Page 161: ...e Supposed Causes Power supply reverse phase T phase open phase Defective outdoor unit PCB A1P Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts...

Page 162: ...of voltage of main circuit capacitor built in the inverter PCB and power supply voltage Error Decision Conditions When the voltage aforementioned is not less than 190V Supposed Causes Power supply in...

Page 163: ...compressor is not more 100k The insulation resistance of fan motor is not more 1M CHECK 4 Has the inverter PCB caused damage Check the condition of the power supply Check if power supply voltage is 3...

Page 164: ...stantaneous power failure open phase noises or else YES YES YES NO NO NO Stop standby when the compressor startup The U2 error recurs Stop standby before the fan rotates Turn ON the power supply and s...

Page 165: ...ded when the unit starts operation without check operation Supposed Causes Check operation is not executed Troubleshooting Performs the check operation again and completes the check operation Has the...

Page 166: ...d when the micro computer detects that the transmission between the indoor and outdoor unit is not normal Error Decision Conditions When transmission is not carried out normally for a certain amount o...

Page 167: ...voltage between R S terminals on the outdoor unit PCB 400V Is the fuse on the outdoor unit PCB blown Does the normal condition monitor for the micro computer HAP on the outdoor unit PCB blink Does th...

Page 168: ...m the previous page YES In Confirmation of error 4 LED lamp indicates as follows Start operation of all the indoor units Do all the units indicate U9 Did more than 2 minutes pass since U9 was indicate...

Page 169: ...Transmission error caused by noise Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred NO NO NO YES NO Replace the indoor u...

Page 170: ...cision Conditions When transmission is not carried out normally for a certain amount of time Supposed Causes Connection error in connecting wires between outdoor unit and external control adaptor for...

Page 171: ...esponding to the error code U7 and for Confirmation of error 4 in the monitor mode Confirmation of error 3 Confirmation of error 4 Confirmation of error 3 Confirmation of error 4 Confirmation of error...

Page 172: ...NO YES NO Correct the connecting wiring with the external control adaptor for outdoor unit Diagnosis Flow 1 Supply the power to the outdoor unit Check if power is supplied to the outdoor units Check...

Page 173: ...n are duplicated Set the address again Replace the outdoor unit main PCB Supply the power to the outdoor unit Replace the outdoor unit main PCB Connect the power supply wire for the external control a...

Page 174: ...heck if the outdoor unit is connected to multi system Confirmation of error 3 Check the connection status of connecting wires of the outdoor multi to SLAVE 1 Check if the wiring is disconnected or is...

Page 175: ...Correct the connecting wires of the outdoor multi and then reset the power supply Replace the outdoor unit main PCB Diagnosis Flow 7 Diagnosis Flow 8 Check the connection status of one of the connect...

Page 176: ...of time Supposed Causes Transmission error between main and sub remote controller Connection among sub remote controllers Defective remote controller PCB Troubleshooting Caution Be sure to turn off po...

Page 177: ...her system Defective electronic expansion valve in indoor unit of other system Defective PCB of indoor unit in other system Improper connection of transmission wiring between indoor and outdoor unit T...

Page 178: ...rence occurs in data by the refrigerant type between indoor and outdoor units The number of indoor units is out of the allowable range Error Decision Conditions The error decision is made as soon as e...

Page 179: ...rmation of error 4 in the monitor mode To Diagnosis Flow 2 To Diagnosis Flow 3 Confirmation of error 3 Confirmation of error 4 Confirmation of error 3 Confirmation of error 4 Confirmation of error 3 C...

Page 180: ...types of the outdoor unit and the indoor unit Confirmation of error 3 Confirmation of error 4 Confirmation of error 3 Confirmation of error 4 Diagnosis Flow 1 Diagnosis Flow 2 The number of indoor un...

Page 181: ...oor unit main PCB Check the model of the outdoor unit Replace the spare PCB Check if the unit is not connected to outdoor units of different models Check if the outdoor unit PCB is replaced with spare...

Page 182: ...ress as that of its own on any other indoor unit Error Decision Conditions The error decision is made as soon as the abnormality aforementioned is detected Supposed Causes Address duplication of centr...

Page 183: ...ion Micro computer checks if transmission between indoor unit and centralized controller is normal Error Decision Conditions When transmission is not carried out normally for a certain amount of time...

Page 184: ...h numbers types of cables and wires number of units connected and others If no problems replace the indoor unit PCB NO YES Continued to A on the following page YES Check the indoor unit for which UE i...

Page 185: ...tion A NO YES Disconnect the transmission wiring of the main centralized controller and then check the voltage between the transmission terminals F1 and F2 of the master unit transmission equipment us...

Page 186: ...of transmission wiring between indoor outdoor units and outdoor outdoor units Failure to execute check operation Defective indoor unit PCB Stop valve is not opened Troubleshooting Caution Be sure to t...

Page 187: ...of indoor unit RQYQ PY1B Method of Error Detection Detect an indoor unit with no auto address setting Error Decision Conditions The error decision is made as soon as the abnormality aforementioned is...

Page 188: ...CB for 5 seconds The unit will not run for up to 12 minutes Normal NO Is electricity being introduce for the first time after installation or after an indoor or outdoor unit PCB has been replaced Is i...

Page 189: ...PCB Short circuit High outdoor air temperature Short circuit High outdoor air temperature Check to be sure the stop valve is open Conduct visual checks for pipe conditions Is there any temperature di...

Page 190: ...perature Is the pressure value checked with the Service Checker corresponding to the measurement of the pressure sensor Is the pressure value checked with the Service Checker corresponding to the meas...

Page 191: ...ective service monitor PCB Check if coil resistance and insulation are normal Check if coil resistance and insulation are normal Check if the voltage property is normal Check if the connector is conne...

Page 192: ...Judgement Criteria 2 15k Remarks 15k and above including Due to condenser charge and so on resistance measurement may require some time 2 15k 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 10 11 12 10 11 12 P2...

Page 193: ...insulation Does the air filter get clogged Are there any obstacles in the air passage Degraded evaporating capacity Increased resistance in air passage Reduced air quantity Reduced fan output 1 Super...

Page 194: ...K 6 High pressure gradually rises with increase in frequency Subcooled degree becomes higher Liquid connection pipe temperature lowers Low pressure rises due to reduced compressor output The outside u...

Page 195: ...tion under cooling control at low outdoor air temperature i e the fan is hunting at high pressure High pressure drops with decrease in compressor capacity If frequency comes to the minimum level low p...

Page 196: ...less for a period of 1 hour or more and then check to be sure that the vacuum gauge reading does not rise If the reading rises moisture may have remained in the system or refrigerant leakage may have...

Page 197: ...r fails to start up Liquid sealing or defective compressor Excessive oil or refrigerant Defective inverter PCB E5 Inverter compressor lock The compressor is in the locked status does not rotate Defect...

Page 198: ...When imbalance in voltages among three phases comes to 2 or more Power supply voltage error When the power supply voltage falls out of the range of 460VAC 10 230VAC 10 Error codes related to compresso...

Page 199: ...2 5 57 94 52 6 65 52 5 6 53 3 56 49 3 5 55 08 53 6 41 53 5 6 53 4 53 71 4 5 52 38 54 6 65 54 5 6 53 5 51 09 5 5 49 83 55 6 41 55 5 6 53 6 48 61 6 5 47 42 56 6 18 56 5 6 06 7 46 26 7 5 45 14 57 5 95 57...

Page 200: ...78 72 5 32 23 122 7 06 122 5 6 97 23 218 24 23 5 213 51 73 31 69 73 5 31 15 123 6 87 123 5 6 78 24 208 90 24 5 204 39 74 30 63 74 5 30 12 124 6 69 124 5 6 59 25 200 00 25 5 195 71 75 29 61 75 5 29 12...

Page 201: ...rvice Diagnosis 191 Pressure Sensor CHECK 12 PH 1 38VH 0 69 PL 0 57VL 0 28 PH High pressure MPa PL Low pressure MPa VH Output Voltage High Side VDC VL Output Voltage Low Side VDC High Pressure PH Low...

Page 202: ...tinuity 2 Procedure for checking indoor outdoor unit transmission wiring for broken wires for checking the indoor outdoor unit transmission wiring of the Outdoor Unit C for broken wires Turn OFF the p...

Page 203: ...available for combined use 2 The intelligent Touch Controller centralized remote controller and the unified ON OFF controller have been set to Provided with the master unit central setting connector a...

Page 204: ...those described in the list of Setting of master unit central setting connector CHECK 15 1 2 3 4 Pattern 1 00 4 15 Master Slave 5 00 8 15 Master Slave 1 00 4 15 Master Slave 5 00 8 15 Master Slave CR...

Page 205: ...SiBE341027 Appendix 195 Part 7 Appendix 1 Piping Diagrams 196 2 Wiring Diagrams 199 3 Accessories 202 3 1 Optional Accessories 202...

Page 206: ...ESSURE SENSOR HIGH LIQUID PIPE FUSIBLE PLUG SOLENOID VALVE CHECK VALVE CHECK VALVE SOLENOID VALVE SOLENOID VALVE CHECK VALVE SOLENOID VALVE CHECK VALVE REFRIGERANT REGULATOR CHECK VALVE SOLENOID VALVE...

Page 207: ...PLUG REFRIGERANT REGULATOR SOLENOID VALVE CHECK VALVE CHECK VALVE SOLENOID VALVE OIL REGULATOR SOLENOID VALVE SOLENOID VALVE PIPE HEAT EXCHANGER PIPE HEAT EXCHANGER FUSIBLE PLUG SOLENOID VALVE ELECTR...

Page 208: ...HECK VALVE CHECK VALVE SOLENOID VALVE SOLENOID VALVE CHECK VALVE OIL REGULATOR SOLENOID VALVE SOLENOID VALVE FUSIBLE PLUG SOLENOID VALVE PIPE HEAT EXCHANGER PIPE HEAT EXCHANGER ELECTRONIC EXPANSION VA...

Page 209: ...E1HC F1U F1U F2U F400U H1P 8P A1P A2P A3P A4P A5P A9P BS1 5 PRINTED CIRCUIT BOARD MAIN PRINTED CIRCUIT BOARD SUB PRINTED CIRCUIT BOARD NOISE FILTER PRINTED CIRCUIT BOARD INV PRINTED CIRCUIT BOARD FAN...

Page 210: ...NETIC CONTACTOR M1C A4P MAGNETIC CONTACTOR M2C MAGNETIC CONTACTOR M1C A3P MAGNETIC RELAY K2M A1P MAGNETIC RELAY Y5S A2P MAGNETIC RELAY A4P MAGNETIC RELAY Y6S A2P MAGNETIC RELAY Y1S A1P MAGNETIC RELAY...

Page 211: ...K2M K3M K4M K1R K2R K1R K1R K2R K3R K3R K3R K4R K4R PRINTED CIRCUIT BOARD MAIN PRINTED CIRCUIT BOARD SUB PRINTED CIRCUIT BOARD NOISE FILTER PRINTED CIRCUIT BOARD INV PRINTED CIRCUIT BOARD FAN PRINTED...

Page 212: ...1B RQYQ16PY1B RQYQ18PY1B RQYQ20PY1B RQYQ22PY1B KRC19 26A KJB111A KRC19 26A KJB111A KHRP26M22H Max 4 branch KHRP26M33H Max 8 branch KHRP26A22T KHRP26A33T KHRP26M22H Max 4 branch KHRP26M33H Max 8 branch...

Page 213: ...Ask a qualified installer or contractor to install those parts and accessories Use of unauthorised parts and accessories or improper installation of parts and accessories can result in water or refri...

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