Daikin BSVQ36MVJU Service Manual Download

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SiUS30-604

Troubleshooting by Indication on the Remote Controller

Troubleshooting

193

2.27

“

”

Outside Unit:

Malfunction of Suction Pipe Pressure Sensor

Remote
Controller
Display

Applicable
Models

RWEYQ60, 72, 84MTJU

Method of
Malfunction
Detection

Malfunction is detected from pressure detected by low pressure sensor.

Malfunction
Decision
Conditions

When the suction pipe pressure sensor is short circuit or open circuit.

Supposed
Causes

Defect of low pressure sensor system

Connection of high pressure sensor with wrong connection.

Defect of outside unit PC board.

Summary of Contents for BSVQ36MVJU

Page 1: ...SiUS30 604 Water Cooled Inverter Series Heat Pump Heat Recovery 60Hz ...

Page 2: ...Units 11 4 Combination of Outside Units 12 5 Capacity Range 13 Part 2 Specifications 15 1 Specifications 16 1 1 Outside Units 16 1 2 BS Units 23 1 3 Indoor Units 24 Part 3 Refrigerant Circuit 37 1 Refrigerant Circuit 38 1 1 RWEYQ60MTJU RWEYQ72MTJU RWEYQ84MTJU 38 1 2 BSVQ36 60M 40 2 Functional Parts Layout 41 2 1 RWEYQ60MTJU RWEYQ72MTJU RWEYQ84MTJU 41 3 Refrigerant Flow for Each Operation Mode 43 3...

Page 3: ... Protection Control 70 6 2 Low Pressure Protection Control 71 6 3 Discharge Pipe Protection Control 73 6 4 Inverter Protection Control 74 6 5 Cooling Fan Control 75 7 Special Operation 76 7 1 Oil Return Operation 76 7 2 Oil Return Operation of Water Heat Exchanger 78 7 3 Pump down Residual Operation Control 79 7 4 Refrigerant Drift Prevention 81 8 Other Control 82 8 1 Outside Unit Rotation 82 9 Ou...

Page 4: ...9 Indoor Unit Malfunction of Moving Part of Electronic Expansion Valve Y1E 164 2 7 AF Indoor Unit Drain Level above Limit 166 2 8 AJ Indoor Unit Malfunction of Capacity Determination Device 167 2 9 C4 Indoor Unit Malfunction of Thermistor R2T for Heat Exchanger 168 2 10 C5 Indoor Unit Malfunction of Thermistor R3T for Gas Pipes 169 2 11 C9 Indoor Unit Malfunction of Thermistor R1T for Suction Air ...

Page 5: ...antaneous Failure 210 2 40 U3 Check Operation not Executed 212 2 41 U4 Malfunction of Transmission between Indoor Units 213 2 42 U5 Malfunction of Transmission between Remote Controller and Indoor Unit 215 2 43 U7 Malfunction of Transmission between Outside Units 216 2 44 U8 Malfunction of Transmission between Master and Slave Remote Controllers 218 2 45 U9 Malfunction of Transmission between Indo...

Page 6: ...f Switch Box 256 1 1 Procedure for Dismounting 256 1 2 Procedure for Mounting 256 Part 8 Appendix 259 1 Piping Diagrams 260 1 1 Outside Units 260 1 2 Indoor Unit 261 1 3 BS Unit 263 2 Wiring Diagrams 264 2 1 Outside Unit 264 2 2 Outside Unit Field Wiring 265 2 3 Indoor Unit 267 2 4 BS Unit 271 3 List of Electrical and Functional Parts 272 3 1 Outside Unit 272 3 2 Indoor Side 273 4 Option List 276 ...

Page 7: ...SiUS30 604 vi Table of Contents Index i Drawings Flow Charts v ...

Page 8: ... plug socket before disassembling the equipment for a repair Working on the equipment that is connected to a power supply can cause an electrical shock If it is necessary to supply power to the equipment to conduct the repair or inspecting the circuits do not touch any electrically charged sections of the equipment If the refrigerant gas discharges during the repair work do not touch the dischargi...

Page 9: ...Use the welder in a well ventilated place Using the welder in an enclosed room can cause oxygen deficiency Warning Be sure to use parts listed in the service parts list of 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 or fire When relocating the ...

Page 10: ...cessively high pressure results causing equipment damage and injury If the refrigerant gas leaks be sure to locate the leak and repair it before charging the refrigerant After charging refrigerant make sure that there is no refrigerant leak If the leak cannot be located and the repair work must be stopped be sure to perform pump down and close the service valve to prevent the refrigerant gas from ...

Page 11: ...tion platform or frame can cause the unit to fall resulting in injury Check the grounding and repair it if the equipment is not properly grounded Improper grounding can cause an electrical 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 drainage of the indo...

Page 12: ...water cooled VRV 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 their needs This service manual contains information regarding the servicing of water cooled VRV System January 2007 After Sales Service Division ...

Page 13: ...Introduction SiUS30 604 xii ...

Page 14: ... Design flexibility 3 1 2 Easy installation 5 1 3 Energy saving 6 1 4 Enhanced usability 7 1 5 Outside unit lineup 8 2 Model Names 9 2 1 Water Cooled System 9 3 External Appearance 10 3 1 Indoor Units 10 3 2 Outside Units 11 4 Combination of Outside Units 12 5 Capacity Range 13 ...

Page 15: ...ipe less internal structure Heat exchanger Evaporating condensing ability Reluctance DC scroll compressor By adoption of the Sine Wave which smoothes rotation of motor operation efficiency is improved sharply Smooth sine wave DC Inverter Reluctance DC motor Scrolling High thrust mechanism A water cooled intelligent individual air conditioning system suitable for tall multistoried buildings Water p...

Page 16: ...ly suitable for tall multistory or large buildings because the system can tolerate up to 284 2psi water pressure Furthermore if the currently installed heat source water temperature is between 50 F and 113 F it may be possible to use the existing water pipe work and heat source This alone makes it an ideal system solution for building refurbishment projects Prior consultation is necessary about th...

Page 17: ...g If the VRV WII is above indoor units 131 ft if the VRV WII is below indoor units Total heating capacity Outside air temperature CDB 14 7 100 60 80 12 6 10 5 9 5 8 5 7 0 5 0 3 0 0 0 3 0 5 0 Refrigerant piping Water piping VRV WII VRV WII Level difference between the VRV WII units up to 6 5 ft Level difference between the VRV WII and indoor units Up to 164 ft if the VRV WII is above Up to 130 ft i...

Page 18: ...er and optimization of the refrigerant control circuit has resulted in the Industry s most compact and lightweight equipment A weight of 0 15 ton and height of 39 3 8 inch make installation possible in buildings with limited space or where no space is available for outside units This makes the system ideal for places that have no area outside such as underground malls Stacked configuration is also...

Page 19: ...ooling operation Heat radiation tendency heat recovery operation mainly cooling part heating operation Heat recovery operation cooling and heating operation Heat absorption tendency heat recovery operation mainly heating part cooling operation Heat absorption operation all heating operation Heat rejected to loop Heat absorption Heat rejected cooling cooling cooling cooling cooling heating cooling ...

Page 20: ...water leakage or corrosion A variety of functions that realize easy installation and improve reliability DTA104A62 Interlocking Control wiring external to external transmission wiring By using one external control adaptor circuit board centralized interlocking input to multiple units within the same water system is possible Easily responds to simultaneous heating and cooling needs By adding suctio...

Page 21: ...Up to 14 12 ton RWEYQ144M 14 ton RWEYQ168M 18 ton RWEYQ216M Up to 22 Up to 22 21 ton RWEYQ252M Up to 32 Up to 32 50 130 of the rated capacity of the VRV WII A lineup of 5 ton to 21 ton models precisely meets wide ranging office space requirements The modular design imparts a simple and smart appearance and makes units easy to install Combination table for VRV WII Numbers of connectable indoor unit...

Page 22: ...m Ceiling Mounted Duct Type FXDQ 07M 09M 12M 18M 24M Ceiling Mounted Built In Type FXSQ 12M 18M 24M 30M 36M 48M Ceiling Mounted Duct Type FXMQ 30M 36M 48M Ceiling Suspended Type FXHQ 12M 24M 36M Wall Mounted Type FXAQ 07M 09M 12M 18M 24M Floor Standing Type FXLQ 12M 18M 24M Concealed Floor Standing Type FXNQ 12M 18M 24M Series Model Name Power Supply Heat Recovery Series BSVQ 36M 60M VJ Series Mod...

Page 23: ...iling mounted duct type FXDQ07MVJU FXDQ09MVJU FXDQ12MVJU FXDQ18MVJU FXDQ24MVJU Wall mounted type FXAQ07MVJU FXAQ09MVJU FXAQ12MVJU FXAQ18MVJU FXAQ24MVJU Ceiling mounted built in type FXSQ12MVJU FXSQ18MVJU FXSQ24MVJU FXSQ30MVJU FXSQ36MVJU FXSQ48MVJU Floor standing type FXLQ12MVJU FXLQ18MVJU FXLQ24MVJU Ceiling mounted duct type FXMQ30MVJU FXMQ36MVJU FXMQ48MVJU Concealed floor standing type FXNQ12MVJU...

Page 24: ...SiUS30 604 External Appearance General Information 11 3 2 Outside Units 5 6 7 ton 12 14 ton 18 21 ton RWEYQ144MTJU RWEYQ168MTJU RWEYQ216MTJU RWEYQ252MTJU RWEYQ60MTJU RWEYQ72MTJU RWEYQ84MTJU ...

Page 25: ...n system an optional Daikin Multi Connection Piping Kit for Outside Unit is required System Capacity Number of units Module Multi Connection Piping Kit for Outside Unit Option 5ton 6ton 7ton 5ton 1 6ton 1 7ton 1 12ton 2 BHFP22MA56U BHFP26MA56U 14ton 2 BHFP22MA56U BHFP26MA56U 18ton 3 BHFP22MA84U BHFP26MA84U 21ton 3 BHFP22MA84U BHFP26MA84U ...

Page 26: ...187 84 218 108 280 126 327 5 Capacity Range 0 6ton 0 8ton 1ton 1 5ton 2ton 2 5ton 3ton 4ton Capacity Index 7 5 9 5 12 18 24 30 36 48 Ceiling Mounted Cassette Type Multi Flow FXFQ 12M 18M 24M 30M 36M Slim ceiling Mounted Duct Type FXDQ 07M 09M 12M 18M 24M Ceiling Mounted Built in Type FXSQ 12M 18M 24M 30M 36M 48M Ceiling Mounted Duct Type FXMQ 30M 36M 48M Ceiling Suspended Type FXHQ 12M 24M 36M Wal...

Page 27: ...Capacity Range SiUS30 604 14 General Information ...

Page 28: ...SiUS30 604 Specifications 15 Part 2 Specifications 1 Specifications 16 1 1 Outside Units 16 1 2 BS Units 23 1 3 Indoor Units 24 ...

Page 29: ...hite 5Y7 5 1 Dimensions H W D in 39 3 8 30 3 4 21 11 16 Heat Exchanger Stainless Steel Plate Type Comp Type Hermetically Sealed Scroll Type Piston Displacement m h 9 21 Number of Revolutions r p m 4 350 Motor Output Number of Units kW 3 2 Starting Method Soft Start Connecting Pipes Liquid Pipe in 3 8 in C1220T Flare Connection Suction Gas Pipe in 3 4 in C1220T Brazing Connection 3 Discharge Gas Pi...

Page 30: ...sions H W D in 39 3 8 30 3 4 21 11 16 Heat Exchanger Stainless Steel Plate Type Comp Type Hermetically Sealed Scroll Type Piston Displacement m h 11 18 Number of Revolutions r p m 5 280 Motor Output Number of Units kW 3 6 Starting Method Soft Start Connecting Pipes Liquid Pipe in 3 8 in C1220T Flare Connection Suction Gas Pipe in 3 4 in C1220T Brazing Connection 3 Discharge Gas Pipe in 4 5 8 in C1...

Page 31: ... 1 Dimensions H W D in 39 3 8 30 3 4 21 11 16 Heat Exchanger Stainless Steel Plate Type Comp Type Hermetically Sealed Scroll Type Piston Displacement m h 13 66 Number of Revolutions r p m 6 450 Motor Output Number of Units kW 4 0 Starting Method Soft Start Connecting Pipes Liquid Pipe in 3 8 in C1220T Flare Connection Suction Gas Pipe in 7 8 in C1220T Brazing Connection 3 Discharge Gas Pipe in 4 3...

Page 32: ...olor Ivory White 5Y7 5 1 Dimensions H W D in 39 3 8 30 3 4 21 11 16 2 Heat Exchanger Stainless Steel Plate Type Comp Type Hermetically Sealed Scroll Type Piston Displacement m h 11 18 2 Number of Revolutions r p m 5 280 2 Motor Output Number of Units kW 3 6 2 Starting Method Soft Start Connecting Pipes Liquid Pipe in 1 2 in C1220T Flare Connection Main Line Suction Gas Pipe in 1 1 8 in C1220T Braz...

Page 33: ...lor Ivory White 5Y7 5 1 Dimensions H W D in 39 3 8 30 3 4 21 11 16 2 Heat Exchanger Stainless Steel Plate Type Comp Type Hermetically Sealed Scroll Type Piston Displacement m h 13 66 2 Number of Revolutions r p m 6 450 2 Motor Output Number of Units kW 4 0 2 Starting Method Soft Start Connecting Pipes Liquid Pipe in 5 8 in C1220T Flare Connection Main Line Suction Gas Pipe in 1 1 8 in C1220T Brazi...

Page 34: ...Color Ivory White 5Y7 5 1 Dimensions H W D in 39 3 8 30 3 4 21 11 16 3 Heat Exchanger Stainless Steel Plate Type Comp Type Hermetically Sealed Scroll Type Piston Displacement m h 11 18 3 Number of Revolutions r p m 5 280 3 Motor Output Number of Units kW 3 6 3 Starting Method Soft Start Connecting Pipes Liquid Pipe in 5 8 in C1220T Flare Connection Main Line Suction Gas Pipe in 1 3 8 in C1220T Bra...

Page 35: ...olor Ivory White 5Y7 5 1 Dimensions H W D in 39 3 8 30 3 4 21 11 16 3 Heat Exchanger Stainless Steel Plate Type Comp Type Hermetically Sealed Scroll Type Piston Displacement m h 13 66 3 Number of Revolutions r p m 6 450 3 Motor Output Number of Units kW 4 0 3 Starting Method Soft Start Connecting Pipes Liquid Pipe in 3 4 in C1220T Flare Connection Main Line Suction Gas Pipe in 1 3 4 in C1220T Braz...

Page 36: ... in 7 1 4 12 1 4 11 7 1 4 12 1 4 11 Sound Absorbing Thermal Insulation Material Flame and Heat Resistant Foamed Polyethylene Flame and Heat Resistant Foamed Polyethylene Piping Connection Indoor Unit Liquid Pipes φ 3 8 Flare Connection 1 φ 3 8 Flare Connection Gas Pipes φ 5 8 Flare Connection 1 φ 5 8 Flare Connection Outside Unit Liquid Pipes φ 3 8 Flare Connection 1 φ 3 8 Flare Connection Suction...

Page 37: ...r Cooling and Heating Sound Absorbing Thermal Insulation Material Foamed Polystyrene Foamed Polyethylene Foamed Polystyrene Foamed Polyethylene Foamed Polystyrene Foamed Polyethylene Piping Connections Liquid Pipes in φ1 4 Flare Connection φ1 4 Flare Connection φ3 8 Flare Connection Gas Pipes in φ1 2 Flare Connection φ1 2 Flare Connection φ5 8 Flare Connection Drain Pipe in VP25 External Dia 1 1 4...

Page 38: ...Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Sound Absorbing Thermal Insulation Material Foamed Polystyrene Foamed Polyethylene Foamed Polystyrene Foamed Polyethylene Piping Connections Liquid Pipes in φ3 8 Flare Connection φ3 8 Flare Connection Gas Pipes in φ5 8 Flare Connection φ5 8 Flare Connect...

Page 39: ...Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Sound Absorbing Thermal Insulation Material Foamed Polyethylene Foamed Polyethylene Foamed Polyethylene Air Filter Removal Washable Mildew Proof Removal Washable Mildew Proof Removal Washable Mildew Proof Piping Connections Liquid...

Page 40: ...rocco Fan Sirocco Fan Motor Output HP 0 17 0 17 Air Flow Rate H L cfm 440 350 H L 580 460 H L External Static Pressure 4 Pa 44 15 44 15 Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Sound Absorbing Thermal Insulation Material Foamed Polyethylene Foamed Polyethylene Air Filter Removal Washable ...

Page 41: ...perature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Sound Absorbing Thermal Insulation Material Glass Fiber Glass Fiber Glass Fiber Air Filter Resin Net with Mold Resistant Resin Net with Mold Resistant Resin Net with Mold Resistant Piping Connections Liquid Pipes in φ1 4 Flare Connec...

Page 42: ...ntrol Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Sound Absorbing Thermal Insulation Material Glass Fiber Glass Fiber Glass Fiber Air Filter Resin Net with Mold Resistant Resin Net with Mold Resistant Resin Net with Mold Resistant Piping Connections Liquid Pipes in φ3 8 Flare Connection φ3 8 F...

Page 43: ...43 Fan Model D11 2D3AA1VE 2D11 2D3AG1VE 2D11 2D3AF1VE Type Sirocco Fan Sirocco Fan Sirocco Fan Motor Output HP 0 21 0 36 0 58 Air Flow Rate H L cfm 690 565 1 020 810 1 270 1 020 External Static Pressure 4 in Aq 0 66 0 43 0 71 0 43 1 0 0 72 Drive Direct Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Hea...

Page 44: ...t Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Sound Absorbing Thermal Insulation Material Glass Wool Glass Wool Glass Wool Air Filter Resin Net with Mold Resistant Resin Net with Mold Resistant Resin Net with Mold Resistant Piping Connections Liquid Pipes in φ1 4 Flar...

Page 45: ...80 Drive Direct Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Sound Absorbing Thermal Insulation Material Foamed Polystyrene Foamed Polyethylene Foamed Polystyrene Foamed Polyethylene Foamed Polystyrene Foamed Polyethylene Air Filter Resin Net ...

Page 46: ... 29 2 29 Fan Model QCL9686 QCL9686 Type Cross Flow Fan Cross Flow Fan Motor Output HP 0 058 0 058 Air Flow Rate H L cfm 500 400 635 470 Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Sound Absorbing Thermal Insulation Material Foamed Polystyrene Foamed Polyethylene Foamed Polystyrene Foamed Pol...

Page 47: ... Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Sound Absorbing Thermal Insulation Material Glass Fiber Urethane Foam Glass Fiber Urethane Foam Glass Fiber Urethane Foam Air Filter Resin Net with Mold Resistant Resin Net with Mold Resistant Resi...

Page 48: ...rect Drive Direct Drive Direct Drive Temperature Control Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Microprocessor Thermostat for Cooling and Heating Sound Absorbing Thermal Insulation Material Glass Fiber Urethane Foam Glass Fiber Urethane Foam Glass Fiber Urethane Foam Air Filter Resin Net with Mold Resistant Resin Net with Mold Resistant ...

Page 49: ...Specifications SiUS30 604 36 Specifications ...

Page 50: ...TJU 38 1 2 BSVQ36 60M 40 2 Functional Parts Layout 41 2 1 RWEYQ60MTJU RWEYQ72MTJU RWEYQ84MTJU 41 3 Refrigerant Flow for Each Operation Mode 43 3 1 In Case of Heat Pump Connection 43 3 2 In Case of Heat Recovery Connection One Outside Unit Installation 45 3 3 In Case of Heat Recovery Connection 3 Outside units Connection 49 ...

Page 51: ... multiple outside unit system P Y7S 4 way selector valve Sub 20S2 Changes the water heat exchanger into condenser or evaporator Q S1NPH High pressure sensor Used to detect high pressure R S2NPL Low pressure sensor Used to detect low pressure S S1PH HP pressure switch For INV compressor In order to prevent the increase of high pressure when a malfunction occurs this switch is activated at high pres...

Page 52: ...SiUS30 604 Refrigerant Circuit Refrigerant Circuit 39 RWEYQ60MTJU RWEYQ72MTJU RWEYQ84MTJU 4D055410 O W 7 G K 8 V E I 6 P M J Q S 3 A R H 2 ...

Page 53: ...id pipe Super cools liquid refrigerant in the heating operation unit during cooling heating simultaneous operation in order to prevent capacity reducing in cooling operation unit caused by flash gas generated in the liquid pipe B Y3S Solenoid valve 20RH Used to changeover the cooling and heating operation of indoor units 4D045338 B A ...

Page 54: ...ensor S1NPL Receiver Plate heat exch assy Electronic expansion valve Y1E Solenoid valve Y2S Stop valve Discharge gas side Stop valve Liquid side Stop valve Suction gas side Electronic expansion valve Y3E Solenoid valve Y6S Solenoid valve Y3S 4way Valve 20S2 Y7S High Pressure Sensor S1NPH High Pressure Switch S1PH Solenoid valve Y1S Oil separator Compressor Gauge port 4way Valve 20S1 Y5S ...

Page 55: ...04 42 Refrigerant Circuit 2 1 2 Sensors R4T Thermistor Heat exchanger gas pipe R3T Thermistor M1C Discharge pipe R6T Thermistor Receiver liquid pipe R2T Thermistor Suction pipe R5T Thermistor Sub cooling heat exchanger Plan Front View ...

Page 56: ...t OFF Heat exchanger Fan Electronic expansion valve Filter Filter Indoor unit Thermostat ON Fan ON Indoor unit ON Heat exchanger Fan Electronic expansion valve Filter Filter High temperature high pressure gas High temperature high pressure liquid Low temperature low pressure liquid or gas Indoor unit operation Suction gas pipe No pipe connection Discharge gas pipe Liquid pipe E3 control ON OFF con...

Page 57: ... Filter Indoor unit OFF Heat exchanger Fan Electronic expansion valve Filter Filter Indoor unit Thermostat ON Fan ON Indoor unit ON Heat exchanger Fan Electronic expansion valve Filter Filter High temperature high pressure gas High temperature high pressure liquid Low temperature low pressure liquid or gas Indoor unit operation Suction gas pipe No pipe connection Discharge gas pipe Liquid pipe E3 ...

Page 58: ...lectronic expansion valve Operation OFF Heat exchanger Electronic expansion valve Capillary tube Three way valve Capillary tube Solenoid valve Check valve Filter Capillary tube Three way valve Capillary tube Solenoid valve Check valve Filter Three way valve Capillary tube Solenoid valve Check valve Filter Capillary tube Indoor unit Thermostat OFF Fan ON Indoor unit To other indoor units ON Cooling...

Page 59: ... valve Capillary tube Solenoid valve Check valve Filter Capillary tube Three way valve Capillary tube Solenoid valve Check valve Filter Capillary tube Three way valve Capillary tube Solenoid valve Check valve Filter Indoor unit Thermostat ON Fan ON To other indoor units ON Cooling Cooling Heating Heat exchanger Fan Electronic expansion valve Filter Filter Indoor unit Thermostat ON Fan ON ON Heat e...

Page 60: ...sing control Capillary tube Three way valve Capillary tube Solenoid valve Check valve Filter Indoor unit Thermostat ON Fan ON To other indoor units ON Cooling Heating Heating Heat exchanger Fan Electronic expansion valve Filter Filter Indoor unit Thermostat ON Fan ON ON Heat exchanger Fan Electronic expansion valve Filter Filter Indoor unit Thermostat ON Fan ON ON Heat exchanger Fan Electronic exp...

Page 61: ...Refrigerant Flow for Each Operation Mode SiUS30 604 48 Refrigerant Circuit ...

Page 62: ... way valve Capillary tube Solenoid valve Check valve Filter Capillary tube Three way valve Capillary tube Solenoid valve Check valve Filter Outside unit 1 Indoor unit Thermostat ON Fan ON Indoor unit To other indoor units ON Cooling Operation Cooling Heat exchanger Fan Electronic expansion valve Filter Filter Indoor unit Fan OFF Indoor unit OFF Heat exchanger Fan Electronic expansion valve Filter ...

Page 63: ...illary tube Solenoid valve Check valve Filter Outside unit 1 Indoor unit Thermostat ON Indoor unit To other indoor units ON Cooling Cooling Heating Heat exchanger Fan Electronic expansion valve Filter Filter Indoor unit Thermostat ON Indoor unit ON Heat exchanger Fan Electronic expansion valve Filter Filter Indoor unit Thermostat ON Indoor unit ON Heat exchanger Fan Electronic expansion valve Filt...

Page 64: ...Solenoid valve Check valve Filter Outside unit 1 Indoor unit Thermostat ON To other indoor units ON Cooling Cooling Heating Heat exchanger Fan Electronic expansion valve Filter Filter Indoor unit Thermostat OFF ON Heat exchanger Fan Electronic expansion valve Filter Filter Indoor unit Thermostat ON ON Heat exchanger Fan Electronic expansion valve Filter Filter Indoor unit operation Bs unit Bs unit...

Page 65: ...be Solenoid valve Check valve Filter Capillary tube Outside unit 1 Indoor unit Thermostat ON Fan ON To other indoor units ON Heating Cooling Heat exchanger Fan Electronic expansion valve Filter Filter Indoor unit Thermostat OFF Fan ON ON Heat exchanger Fan Electronic expansion valve Filter Filter Indoor unit Thermostat ON Fan ON Heat exchanger Fan Electronic expansion valve Filter Filter Bs unit B...

Page 66: ...tection Control 70 6 1 High Pressure Protection Control 70 6 2 Low Pressure Protection Control 71 6 3 Discharge Pipe Protection Control 73 6 4 Inverter Protection Control 74 6 5 Cooling Fan Control 75 7 Special Operation 76 7 1 Oil Return Operation 76 7 2 Oil Return Operation of Water Heat Exchanger 78 7 3 Pump down Residual Operation Control 79 7 4 Refrigerant Drift Prevention 81 8 Other Control ...

Page 67: ...SiUS30 604 54 Function 9 8 Heater Control 90 9 9 List of Swing Flap Operations 91 9 10 Freeze Prevention 92 ...

Page 68: ...id valve for discharging gas from receiver SVL Y3S Solenoid valve for gas charging to receiver SVE Y2S Solenoid valve for oil collection from water heat exchanger SVP Y1S Solenoid valve for hot gas bypass SVSL Y6S Solenoid valve for non operating unit liquid pipe closing Tc High pressure equivalent saturation temperature TcS Target temperature of Tc Condensing temperature Te Low pressure equivalen...

Page 69: ...g operation 1 3 Cooling Heating simultaneous operation 1 3 BS unit Indoor unit operation 1 4 Slave unit stopping function 2 1 Compressor control 5 1 Electronic expansion valve control 5 2 Heat exchanger mode control 5 3 High pressure protection control 6 1 Low pressure protection control 6 2 Discharge pipe protection control 6 3 Inverter protection control 6 4 Refrigerant drift prevention 7 4 Rest...

Page 70: ...exchanger electronic exp valve EV1 Y1E Heat exchanger mode control In case of cooling operation Heat exchanger mode control In case of heating and simultaneous cooling heating operation Sub cooling electronic exp valve EV3 Y3E EV3 control EV3 control Hot gas bypass solenoid valve SVP Y1S Protection control Protection control Water heat exchanger oil return solenoid valve SVE Y2S OFF Water heat exc...

Page 71: ...ol Indoor unit control Thermostat OFF Fan 20RH OFF OFF OFF OFF 20RT OFF OFF OFF OFF Indoor Fan Depend on remote controller Depend on remote controller Depend on remote controller Depend on remote controller Indoor EV 0 pulse 0 pulse 0 pulse 0 pulse Stopping 20RH 20RT Indoor Fan Indoor EV OFF OFF OFF 0 pulse OFF OFF OFF 0 pulse OFF OFF OFF 0 pulse OFF OFF OFF 0 pulse Heating Thermostat ON 20RH ON O...

Page 72: ... oil return solenoid valve SVE Y2S OFF Receiver gas charging solenoid valve SVL Y3S OFF Receiver gas discharge solenoid valve SVG Y4S OFF Non operation unit liquid pipe stop solenoid valve SVSL Y6S ON Ending conditions Indoor unit thermostat ON Parts name Symbol Electrical symbol Mode A operation 1 Mode B operation 1 Compressor M1C OFF OFF Inverter cooling fan M1 2F OFF OFF 4 way valve Main 20S1 Y...

Page 73: ...pulse 0 pulse Hot gas bypass solenoid valve SVP Y1S OFF OFF Water heat exch oil return solenoid valve SVE Y2S OFF OFF Receiver gas charging solenoid valve SVL Y3S ON OFF Receiver gas discharge solenoid valve SVG Y4S OFF OFF Non operation unit liquid pipe stop solenoid valve SVSL Y6S OFF ON Mode transition conditions To Mode B when No gas shortage signal is sent from indoor unit To Mode A when gas ...

Page 74: ...t exchanger electronic exp valve EV1 Y1E 0 pulse Sub cooling electronic exp valve EV3 Y3E 0 pulse Hot gas bypass solenoid valve SVP Y1S OFF Water heat exch oil return solenoid valve SVE Y2S OFF Receiver gas charging solenoid valve SVL Y3S OFF Receiver gas discharge solenoid valve SVG Y4S OFF Non operation unit liquid pipe stop solenoid valve SVSL Y6S ON Indoor cooling unit fan M1 2F Remote control...

Page 75: ...g fan M1 2F OFF Inverter cooling fan control 4 way valve Main 20S1 Y5S Holding OFF 4 way valve for heat exchanger 20S2 Y7S Holding OFF Main heat exchanger electronic exp valve EV1 Y1E 0 pulse 2000 pulse Sub cooling electronic exp valve EV3 Y3E 0 pulse 0 pulse Hot gas bypass solenoid valve SVP Y1S OFF ON Water heat exch oil return solenoid valve SVE Y2S OFF OFF Receiver gas charging solenoid valve ...

Page 76: ...xchanger 20S2 Y7S Holding OFF Main heat exchanger electronic exp valve EV1 Y1E 0 pulse 180 pulse Sub cooling electronic exp valve EV3 Y3E 0 pulse 0 pulse Hot gas bypass solenoid valve SVP Y1S OFF ON Water heat exch oil return solenoid valve SVE Y2S OFF OFF Receiver gas charging solenoid valve SVL Y3S OFF OFF Receiver gas discharge solenoid valve SVG Y4S OFF OFF Non operation unit liquid pipe stop ...

Page 77: ...ol Compressor M1C 74Hz 4 way valve Main 20S1 Y5S OFF 4 way valve for heat exchanger 20S2 Y7S OFF Main electronic expansion valve EV1 Y1E 2000 pulse Sub cooling electronic expansion valve EV3 Y3E 0 pulse Hot gas bypass solenoid valve SVP Y1S ON Water heat exch oil return solenoid valve SVE Y2S OFF Receiver gas charging solenoid valve SVL Y3S OFF Receiver gas SVG Y4S OFF Non operation unit liquid pi...

Page 78: ... M Normal factory setting H 37 4 42 8 48 2 Controls compressor capacity to adjust Tc to achieve target value TcS Tc High pressure equivalent saturation temperature F Tc setting TcS Target Tc value Varies depending on Tc setting operating frequency etc L M Normal factory setting H 109 4 114 8 120 2 Controls compressor capacity to adjust Te to achieve target value TeS and Tc to achieve target value ...

Page 79: ...Hz 88Hz 96Hz 104Hz 110Hz 112Hz 120Hz 130Hz 141Hz 156Hz 168Hz 177Hz 189Hz 202Hz 210Hz 216Hz 230Hz 52Hz 57Hz 62Hz 65Hz 68Hz 71Hz 74Hz 81Hz 88Hz 96Hz 104Hz 110Hz 112Hz 120Hz 130Hz 141Hz 156Hz 168Hz 177Hz 189Hz 202Hz 210Hz 216Hz 230Hz 52Hz 57Hz 62Hz 65Hz 68Hz 71Hz 74Hz 81Hz 88Hz 96Hz 104Hz 110Hz 112Hz 120Hz 130Hz 141Hz 156Hz 168Hz 177Hz 189Hz 202Hz 210Hz 216Hz 230Hz Step No Master Slave 1 Slave 2 B 2 ...

Page 80: ...r the full use of the sub cooling heat exchanger Heating operation To lower the discharge temperature when the discharge temperature is over 203 F makes PI control of the electronic expansion valve Y3E to keep the superheated degree of the outlet gas pipe on the evaporator side for the full use of the sub cooling heat exchanger When the discharge temperature is lower than 203 F EV3 opening is 0 pu...

Page 81: ...aster unit OFF Condenser Slave unit 1 OFF Condenser Four way changeover valve for heat exchanger Y7S For the application of heat exchanger Content of the control of electronic expansion valve Y1E Control of heat exchange capacity balance Control of heat exchange capacity balance Master unit OFF Condenser Slave unit 1 ON Evaporator Four way changeover valve for heat exchanger Y7S For the applicatio...

Page 82: ...F Condenser Slave unit 1 ON Evaporator Four way changeover valve for heat exchanger Y7S For the application of heat exchanger Content of the control of electronic expansion valve Y1E Control of heat exchange capacity balance Control of heat exchange capacity balance Slave unit 2 ON Evaporator Control of heat exchange capacity balance ON Evaporator Slave unit 1 OFF Condenser Four way changeover val...

Page 83: ...malfunction code E3 Normal operation Pc 427 7psi Pc 397 3psi Pc 468 3psi Comp upper limit 216 Hz Pc 507 5psi INV upper limit frequency 216 Hz Comp upper limit down 3 steps 10 sec INV upper limit up 1 step 30 sec Pc 507 5psi Frequency control Pc 526 3psi Comp 52Hz Less than 2 times within 30 min Pc HP pressure sensor detection value for each outside unit High pressure standby When occurring 3 times...

Page 84: ... Pe 56 5psi 1 Pe LP pressure sensor detection value for master unit 2 This frequency control is carried out in whole system Less than 3 times within 60 min Pe 49 3psi Pe 34 8psi Compressor 52Hz Hot gas solenoid valve Y1S ON Hot gas solenoid valve Y1S OFF Normal control Low pressure standby Pe 10 1psi When occurring 4 times within 60 min the malfunction code E4 is output Pe 91 3psi Pe 79 7psi Pe 10...

Page 85: ...psi Comp upper limit down 3 steps 10 sec Compressor 52 Hz Compressor upper limit frequency 216Hz Pe 10 1psi When occurring 4 times within 60 min the malfunction code E4 is output 1 Pe LP pressure sensor detection value for each outside unit 2 This frequency control is carried out in each outside unit Less than 3 times within 60 min Pe 71 0psi Pe 49 3psi Comp upper limit up 1 step 20 sec Pe 63 8psi...

Page 86: ...tside unit INV compressor HTdi Value of INV compressor discharge pipe temperature Tdi compensated with outdoor air temperature Discharge pipe temp control standby HTdi 275 F HTdi 248 F for 10 min or more or HTdi 266 F HTdi 248 F for 5 min or HTdi 212 F HTdi 230 F HTdi 239 F HTdi 239 F When occurring 3 times within 100 minutes the malfunction code F3 is output Normal operation Compressor upper limi...

Page 87: ...c 220V unit 220 V unit Ia 26 5 A When occurring 3 times within 60 min the malfunction code L8 is output Comp upper limit down 1 step 15 sec Comp upper limit up 1 step 20 sec Inverter current Ia Inverter current Ia continues for 3 min or more Invertercurrent Ia Less than 2 times within 60 min Normal operation Tfin 122 F Tfin 86 F Fin temp standby Tfin 174 2 F Compressor up limit frequency 230 Hz Tf...

Page 88: ...ntrol of the cooling fan to cool the inverter This cooling fan operates only when the temperature of the inverter fan is high in order to reduce the operating time of the fan Details Control the cooling fan by each outside unit Cooling fan OFF Cooling fan ON 52C1 ON T fin 122 F 52C1 OFF T fin 86 F OR ...

Page 89: ... valve Main 20S1 Y5S 4 way valve for heat exchanger 20S2 Y7S EV1 Y1E EV3 Y3E SVP Y1S SVE Y2S SVL Y3S SVG Y4S SVSL Y6S M1 2F Same as normal cooling operation Normal control Thermostat off EV Y1E Stop thermostat off Normal control 200 pls Thermostat ON Indoor unit control M1 2F EV Y1E BS 20RH ON OFF OFF BS 20RT 20RT Y1S OFF OFF OFF Ending condition 20 sec Max 3 min Max 3 min Max 3min 30sec Thermosta...

Page 90: ...x 2 min Max 4 min Max 3 min Indoor heating unit expansion valve EV Y1E Normal control 320 pulse EV1 Y1E 20S2 OFF 2000 pulse 20S2 ON 180 pulse Sub cooling electronic expansion valave EV3 Y3E 0 pulse Main heat exchanger electronic expansion valve 104 Hz 4 way valve 1 20S1 Y5S ON 4 way valve 2 20S2 Y7S Heat exchanger mode SVP Y1S ON SVE Y2S OFF SVL Y3S OFF EV Y1E 320 pulse Normal control Indoor cooli...

Page 91: ...rical symbol Water heat exchanger oil return control Compressor M1C 20S1 Y5S 20S2 Y7S 52 Hz ON OFF EV1 Y1E EV3 Y3E SVP Y1S SVE Y2S SVL Y3S SVG Y4S SVSL Y6S M1 2F EV Y1E 20RH Y3S BS 20RH BS 20RT 20RT Y1S Receiver gas charging solenoid EV Y1E Indoor heating unit expansion valve Receiver gas discharge solenoid valve Non operation unit liquid pipe stop solenoid valve Indoor cooling unit fan Indoor coo...

Page 92: ... Current step OFF Inverter cooling fan M1 2F Inverter cooling fan control Inverter cooling fan control 4 way valve Main 20S1 Y5S OFF OFF 4 way valve for heat exchanger 20S2 Y7S OFF OFF Main heat exchanger electronic exp valve EV1 Y1E 2000 pulse 0 pulse Sub cooling electronic exp valve EV3 Y3E 0 pls 0 pulse Hot gas bypass solenoid valve SVP Y1S ON OFF Water heat exch oil return solenoid valve SVE Y...

Page 93: ...0 pulse 0 pulse Sub cooling electronic exp valve EV3 Y3E 0 pulse 0 pulse Hot gas bypass solenoid valve SVP Y1S ON OFF Water heat exch oil return solenoid valve SVE Y2S OFF OFF Receiver gas charging solenoid valve SVL Y3S OFF OFF Receiver gas discharge solenoid valve SVG Y4S OFF OFF Non operation unit liquid pipe stop solenoid valve SVSL Y6S OFF ON Indoor cooling unit fan M1 2F No instruction Indoo...

Page 94: ...lenoid valve SVG for venting receiver gas of the outside units that are running out of gas 2 In case of cooling heating simultaneous connection When the superheated degree at the evaporator outlet is large open the solenoid valve SVG for venting receiver gas of the outside units that are running out of gas and the solenoid valve SVL for pressurizing the receiver of the excessively charged outside ...

Page 95: ...diagram shows outside unit rotation in combination of 3 outside units Master unit slave unit 1 and slave unit 2 in this 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 outside unit connected the control wires F1 and F2 for the indoor unit should be designated as mast...

Page 96: ... button 1 4 given in the figure below 9 1 1 When the Float Switch is Tripped While the Cooling Thermostat is ON 1 The objective of residual operation is to completely drain any moisture adhering to the fin of the indoor unit heat exchanger when the thermostat goes off during cooling operation 9 1 2 When the Float Switch is Tripped During Cooling OFF by Thermostat ...

Page 97: ...reset even after the 5 minutes operation 5 seconds stop 5 minutes operation cycle ends operation continues until the switch is reset 9 1 4 When the Float Switch is Tripped and AF is Displayed on the Remote Controller Note 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 ...

Page 98: ...ow multi 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 Existing position Draft prevention position Standard Setting position Ceiling soiling prevention position Not for Multi flow type Draft prevention position Standard position Prohibited Prohibited Dirt prevention position P0 P0 P0 P1 P2 P2 P1 P3 P3 P4 P4 P1 P2 P3 P4 Same as existing position...

Page 99: ...et temperature Ex When cooling Assuming the preset temperature in the figure above is 75 F and the suction temperature has changed from 64 F to 86 F A 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 temperatures from 64 F to 73 F A C Remote controller th...

Page 100: ...an be used so that suction temperature is higher than the preset temperature Ex When heating Assuming the preset temperature in the figure above is 75 F and the suction temperature has changed from 64 F to 82 F A D 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 us...

Page 101: ...formation on page onward 9 5 Thermostat Control in Dry Operation While in dry operation the thermostat control is conducted according to a suction temperature at the time of starting the dry operation Assuming that the suction air temperature at the time of starting the dry operation is Tro and the suction air temperature in operation is Tr Furthermore while in dry operation mode fans operate at L...

Page 102: ... 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 condition 1 or the start condition 2 is established the operations shown below will be conducted Cooling SH TH1 TH2 SH Evaporator outlet superheated degree Heating SC TC TH1 TH1 Temperature F detected with t...

Page 103: ...erting the heater temperature into the condensing pressure equivalent saturated temperature Tc according to the temperature detection through the high pressure sensor SINPH of the outside unit Fan residual operation While the heater turns OFF in order to prevent the activation of the thermal protector the fan conducts residual operation for a given period of time after the heater turns OFF This op...

Page 104: ...OFF mode for prevention of cold air Swing LL Horizontal Horizontal Horizontal Wind direction set LL Horizontal Horizontal Horizontal Stop Swing OFF Horizontal Horizontal Totally closed Wind direction set OFF Horizontal Horizontal Totally closed Cooling Thermostat ON in dry operation using micro computer Swing L 1 Swing Swing Swing Wind direction set L 1 Set Set Set Thermostat OFF in dry operation ...

Page 105: ...e unit enters freeze prevention operation in accordance with the following conditions and is also set in accordance with the conditions given below Conditions for starting freeze prevention Temperature is 30 F or less for total of 40 min or temperature is 23 F or less for total of 10 min Conditions for stopping freeze prevention Temperature is 45 F or more for 10 min continuously Ex Case where tem...

Page 106: ...peration 93 Part 5 Test Operation 1 Test Operation 94 1 1 Procedure and Outline 94 2 Outside Unit PC Board Layout 98 3 Field Setting 99 3 1 Field Setting from Remote Controller 99 3 2 Field Setting from Outside Unit 110 ...

Page 107: ... installation manual Special care is required for multi outside unit installation Is the air tight test and vaccume drying carried out as per installation manual Is refrigerant charged up to the specified amount If insufficient charge the refrigerant from the service port of stop valve on the liquid side with outside unit in stop mode after turning power on If the specified amount of refrigerant c...

Page 108: ...D display Factory set Micro computer normal monitor MODE TEST CH selection Low noise Demand Multi IND Master Slave HAP H1P H2P H3P H4P H5P H6P H7P H8P 1 outside unit installation 9 1 1 8 1 1 1 1 1 outside unit multi installation master 9 1 1 8 1 1 1 1 8 slave1 9 1 1 1 1 1 1 1 9 slave2 9 1 1 1 1 1 1 1 1 Outside unit Test lamp H2P Blinks Can also be set during operation described above Indoor unit I...

Page 109: ...the switch box While in the test operation operating sounds such as refrigerant passing sounds or solenoid valve switching sounds may become louder In the case of multi outside unit system make setting on the master unit PC board Setting with the slave unit is disabled Check Setting mode 1 If the LED H1P turns OFF the system is set to Setting mode 1 If the H1P turns ON or OFF pressing the PAGE FEE...

Page 110: ...7 7 OFF 9 9 Blink H1P H7P H8P Factory set Master Slave 1 Slave 2 77 7777777 7777 7 7777777 7777777 9 9 7777777 7 7777777 7 Malfunction code Installation error Remedial action E3 E4 F3 F6 UF U2 The shutoff valve of an outside unit is left closed The cooling water is not provided Open the shutoff valve Check the operation of cooling water pump etc U1 The phases of the power to the outside units are ...

Page 111: ...de Outside unit 2 Set mode display LED 3 Mode setting switch 4 Local setting switch Connection terminal for transmission use DS1 DS2 DS3 1 Microcomputer normal monitor HAP V3054 1 Microcomputer normal monitor This monitor blinks while in normal operation and turns on or off when a malfunction occurs 2 Set mode display LED LEDs display mode according to the setting 3 Mode setting switch Used to cha...

Page 112: ...mode push the button for 4 seconds or more and operation then enters the field set mode 2 Select the desired mode No with the button 3 During group control and you want to set by each individual indoor unit when mode No 20 21 22 23 25 has been selected push the time mode button and select the indoor unit No to be set Note This operation is not required when setting as a group 4 Push the button and...

Page 113: ...he field set mode 2 Select the desired 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 normal mode Example When setting the filter sign time to Filter Dirtiness High in all group unit setting set the Mode No to 10 Mode setting No to 0 and setting po...

Page 114: ...r the FIELD SET MODE 3 Select the mode No 00 with BS2 BUTTON temperature setting and BS3 BUTTON temperature setting 4 Select the group No with BS9 BUTTON set A and BS10 BUTTON set B Group Nos increase in the order of 1 00 1 01 1 15 2 00 4 15 However the unified ON OFF controller displays only group No set within the range of control 5 Press BS7 BUTTON set cancel to set group No 6 Press BS6 BUTTON ...

Page 115: ...ter calculation Set when filter sign is not to be displayed Display No display 12 22 0 Optional accessories output selection field selection of output for adaptor for wiring Indoor unit turned ON by thermostat Operationoutput Malfunction output 1 ON OFF input from outside Set when ON OFF is to be controlled from outside Forced OFF ON OFF control External protection device input 2 Thermostat differ...

Page 116: ... duct type Ceiling Suspended type Wallmounted type Floor standing type Concealed Floor standing type Multi flow FXFQ FXSQ FXMQ FXHQ FXAQ FXLQ FXNQ Filter sign Ultra long life filter sign Remote controller thermostat sensor Set fan speed when thermostat OFF Air flow adjustment Ceiling height Air flow direction Air flow direction adjustment Down flow operation Air flow direction adjustment range Fie...

Page 117: ...ower failure reset or the main power supply turned on again return to the same operation condition as that of before power failure For the above reasons when the unit is set enabling to utilize Auto restart function after power failure reset utmost care should be paid for the occurrence of the following situation F2 T1 T2 Forced stop Input A Mode No Setting Switch No Setting Position No Operation ...

Page 118: ...arts 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 Mode No Setting Switch No Setting Position No Setting 13 23 0 01 Wall mounted type Standard 02 Wall mounted type Slight increase 03 Wall mounted type Normal increase Mode No First code No Second code No Setting Ceiling h...

Page 119: ...ton to inspect the group No display 4 Set the group No for each group with the button The group No increases in the manner of 1 00 1 01 1 15 2 00 4 15 However the unified ON OFF controller displays only the group No within the range selected by the switch for setting each address 5 Push the timer button to define the selected group No 6 Push the button to return to the normal mode Even if not usin...

Page 120: ...e normal mode BRC7C Type 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 liquid crystal display This is not an operative fault Centralized Remote Controller F1 F2 F1 F2 F1 F2 F1 F2 P1 P2 RC RC RC RC RC F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 ...

Page 121: ...ation mode setting by remote controller can be set and displayed by operation modes 0 through 19 ON OFF control impossible by remote controller Used when you want to turn ON OFF by central remote controller only Cannot be turned on off by remote controller OFF control only possible by remote controller Used when you want to turn on by central remote controller only and off by remote controller onl...

Page 122: ...de Operation Stop Temperature control Operation mode setting Unified operation individual operation by central remote controller or operation controlled by timer Unified stop individual stop by central remote controller or timer stop ON OFF control impossible by remote controller Rejection Example Rejection Example Rejection Example Rejection Acceptance 0 Rejection 10 Acceptance Example Acceptance...

Page 123: ...sed Do not change the factory settings OFF Factory set DS3 1 2 ON Not used Do not change the factory settings OFF Factory set Caution DIP switch Setting after changing the main P C Board A1P to spare parts P C B When you change the main P C Board A1P to spare parts P C B please carry out the following setting DIP Switch Detail DS No Item Contents DS1 1 DS1 2 Domestic Overseas setting ON Domestic J...

Page 124: ...tting mode 2 Mode changing procedure H1P H2P H3P H4P H5P H6P H7P H8P Master unit 7 7 8 7 7 7 7 8 Slave unit 1 7 7 7 7 7 7 7 9 Slave unit 2 7 7 7 7 7 7 7 7 BS1 MODE BS2 SET BS3 RETURN BS4 TEST BS5 RESET V2760 Setting mode 1 Monitor mode H1P Push the BS1 MODE button one time Blinking MODE MODE Off H1P Setting mode 2 MODE On H1P Push and hold the BS1 MODE button for 5 seconds Push the BS1 MODE button...

Page 125: ...al 7 7 8 7 7 7 7 During demand operation 7 7 8 7 7 7 8 H3P to H5P LED display changes depending on setting No 2 3 4 8 ON 7 OFF 9 Blinking a Setting mode 1 Selection of setting items Push the SET button BS2 and set LED display to a setting item you want z Regarding setting item No 1 5 only the present status is displayed For the respective description refer to the table shown on lower right z The c...

Page 126: ...eck after disconnection of compressor wires Used for trouble diagnosis of DC compressor Since the waveform of inverter is output without wiring to the compressor it is convenient to probe whether the trouble comes from the compressor or PC board 30 Demand setting 1 Changes target value of power consumption when demand control 1 is input 32 Normal demand setting Normally enables demand control 1 wi...

Page 127: ...e applicable outside unit from operating should there be any faulty part in multi outside 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 operation prohibition in multi outside unit system 40 Emergency operation Setting for the slave unit 2 operation prohibition in multi outside unit ...

Page 128: ...eration 8777778 Indoor forced operation 8777787 8 Te setting 8 7 7 8 7 7 7 High 8777877 Normal 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 setting 8 7 7 8 7 8 7 Quick defrost 8777877 Normal factory setting 8777787 Slow defrost 8777778 12 External low noise demand setting 8 7 7 8 8 7 7 External low noise demand NO...

Page 129: ...mand 8777877 32 Continuous demand setting 8 8 7 7 7 7 7 OFF 8777778 ON 8777787 38 Emergency operation Master unit with multi outside unit system is inhibited to operate 8 8 7 7 8 8 7 OFF 8777778 Master unit operation Inhibited 8777787 39 Emergency operation Slave unit 1 with multi outside unit system is inhibited to operate 8 8 7 7 8 8 8 OFF 8777778 Slave unit 1 operation Inhibited 8777787 40 Emer...

Page 130: ...9 7 7 7 8 8 7 7 Number of connected zone units excluding outdoor and BS unit 9 7 7 7 8 8 8 8 Number of outside units 2 9 7 7 8 7 7 7 9 Number of connected BS units 3 9 7 7 8 7 7 8 Lower 4 digits upper 10 Number of connected BS units 3 9 7 7 8 7 8 7 Lower 4 digits lower 11 Number of zone units excluding outdoor and BS unit 9 7 7 8 7 8 8 Lower 6 digits 12 Number of indoor units 4 9 7 7 8 8 7 7 Lower...

Page 131: ...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 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 four upper and four lower digits for No 12 and 13 respectively 0 128 ...

Page 132: ...ted before turning power supply ON NOTE 1 2 1 2 F2 B C A F2 F1 F1 F2 F1 Outside unit TOIN DUNIT TOOUT DUNIT F1 F2 F1 F2 F1 F2 F1 F2 IN D OUT D BS REMOTE CONTROLLER BS unit A F1 F2 F1 F2 IN D OUT D BS BS unit B COOL HEAT selector Branch wiring Use 2 core wires There is no polarity B C A REMOTE CONTROLLER COOL HEAT selector Cool heat selector remote control wiring Use 3 core wires Keep in mind the p...

Page 133: ...te controllers After the check operation CHANGEOVER UNDER CONTROL is flashing in all connected remote controllers Select an indoor unit to be used as the master unit in accordance with the request from the customer It is recommended to select an indoor unit which will be used most often as the master unit Press the operation mode selector button in the remote controller of the indoor unit selected...

Page 134: ...at Separately for Each Outdoor Unit System by Cool Heat Selector It does not matter whether or not there is outdoor outdoor 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 ...

Page 135: ...dapter on either the outside unit outside unit indoor outside or transmission line Set outside unit PC board DS1 1 to Indoor factory set In setting mode 1 set the outside unit you want to give cool heat selection permission to as the group master and set the other outside units as group slave units Set the outside unit external control adapter SS1 to Unified factory set or Cool and SS2 to No facto...

Page 136: ...change the following items to e Install cool heat switching remote controller on the group master outside unit Set SS1 on the group master outside unit PC board Supplementation on e and f When switching cool heat for each adapter PC board with the use of more than one adapter PC board set the address of the adapter PC board DS1 and DS2 so that it matches the unified cool heat address of outside un...

Page 137: ...umber No 0 to No 31 Address No Outside unit PCB LED Set with setting mode 2 Adapter PCB No 0 No 1 No 2 No 3 No 4 No 30 No 31 DS2 DS1 87 77777 87 77778 87 77787 87 77788 87 77877 87 88887 87 88888 0 1 2 3 4 30 31 0 1 2 3 4 30 31 8ON 7OFF Upper position ON Lower position OFF The shaded part shows knob V2724 ...

Page 138: ...tional setting of Normal Demand Setting or external input by external control adapter is required Demand 1 setting Demand 2 setting Other protection control functions have precedence over the above operation Setting Standard for upper limit of power consumption Demand 1 setting 1 Approx 60 Demand 1 setting 2 factory setting Approx 70 Demand 1 setting 3 Approx 80 Setting Standard for upper limit of...

Page 139: ...unit 1 While in Setting mode 2 set the setting condition for set item No 12 Setting of external low noise demand operation to YES 2 If necessary while in Setting mode 2 select the set item No 30 Setting of Demand 1 level and then set the setting condition to targeted mode B When the normal demand operation is carried out Use of the external control adapter for outside unit is not required 1 While ...

Page 140: ... is set to ON OFF has been set at factory the power consumption can be set with the Demand 1 level setting 70 of rated power consumption has been set at factory Power consumption Rated power consumption 80 of rated power consumption 70 of rated power consumption 60 of rated power consumption 40 of rated power consumption Forced thermostat OFF Fan operation V3083 The power consumption set with Dema...

Page 141: ... match the LED display with the setting content as shown below you want f Push the BS3 RETURN button two times Returns to c g Push the BS1 MODE button one time Returns to the setting mode 1 and turns H1P off c d e Setting No Setting contents Setting No indication Setting No indication Setting contents Setting contents indication Initial setting H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H...

Page 142: ...O Turn off the power Charge through Service port of LIQ Stop valve Open DISCHARGE GAS LIQUID SUCTION GAS Stop valve Open LIQUID Stop valve Disconnect charge hose END of charge method STOP refrigerant charge model STEP 1 Additional charge without Compressor operation Start additional refrigerant charge mode Setting Mode 2 Refer operation procedure detail on next page Open DISCHARGE SUCTION GAS Stop...

Page 143: ...or the amount to be added Additional refrigerant charge procedure 1 normally Charge the refrigerant to the liquid pipe in its liquid state Since R 410A is a mixed refrigerant its composition changes if charged in a state of gas and normal system operation would no longer be assured Make sure to use installation tools you exclusively use on R 410A installations to withstand the pressure and to prev...

Page 144: ...tem is charged with a specified amount of refrigerant press the RETURN button BS3 on the PC board A1P in the outside unit to stop the additional refrigerant charge operation 4 Immediately open both liquid side and gas side stop valve If do not open the stop valve immediately liquid seal may cause the pipe to burst Note If the refrigerant cylinder is siphonal set it upright while charging additiona...

Page 145: ...er of service port without fail by specified torque When loosening a flare nut always use two wrenches in combination When connecting the piping always use a spanner and torque wrench in combination to tighten the flare nut When connecting a flare nut coat the flare inner and outer faces with ether oil or ester oil and hand tighten the nut 3 to 4 turns as the initial tightening Do not forget to op...

Page 146: ...uction attached to the refrigerant recovery unit for more detal e Press Mode button BS1 once and reset Setting Mode 2 3 2 7 Setting of Vacuuming Mode In order to perform vacuuming operation at site fully open the expansion valves of indoor and outside units to turn on some solenoid valves Operating procedure c With Setting Mode 2 while the unit stops set B Refrigerant recovery Vacuuming mode to ON...

Page 147: ...rized valve Unit stopping Press the TEST button for 5 seconds 10 sec to 10 minutes LED display H1P H7P 8 ON 9 BLINKING 3 OFF 3383333 3933338 Pressure equalizing Step 1 3 5 minutes 10 minutes 3 minutes 10 sec 5 minutes 3933383 Cooling start control Step 2 3933388 3938333 3938338 3383333 3883333 Stability waiting operation Step 3 Pump down residual operation Step 7 5 minutes Standby for restarting C...

Page 148: ...the operative compressor or outside unit 3 2 11 Restrictions for Emergency Operation If the emergency operation is set while the outside unit is in operation the outside unit stops once after pump down residual operation a maximum of 5 minutes elapsed 3 2 12 In the Case of Multi Outside Unit System Automatic backup operation With multi outside unit system if a certain outside unit system malfuncti...

Page 149: ...DE button BS1 once To inhibit the slave unit 2 from operating Set setting mode 2 from No 40 to No 2 Procedure 1 Press and hold the MODE button BS1 for 5 sec or more 2 Press the SET button BS2 40 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 the case of multi outside unit system when the above Inhibit...

Page 150: ...function of Thermistor R2T for Heat Exchanger 168 2 10 C5 Indoor Unit Malfunction of Thermistor R3T for Gas Pipes 169 2 11 C9 Indoor Unit Malfunction of Thermistor R1T for Suction Air 170 2 12 CJ Indoor Unit Malfunction of Thermostat Sensor in Remote Controller 171 2 13 E1 Outside Unit PC Board Defect 172 2 14 E3 Outside Unit Actuation of High Pressure Switch 173 2 15 E4 Outside Unit Actuation of ...

Page 151: ...r Unit 215 2 43 U7 Malfunction of Transmission between Outside Units 216 2 44 U8 Malfunction of Transmission between Master and Slave Remote Controllers 218 2 45 U9 Malfunction of Transmission between Indoor and Outside Units in the Same System 219 2 46 UA Indoor Outside Units and Remote Controller Combination Failure 221 2 47 UC Address Duplication of Centralized Controller 223 2 48 UE Malfunctio...

Page 152: ...roper Setting 242 5 Troubleshooting OP Unified ON OFF Controller 243 5 1 Operation Lamp Blinks 243 5 2 Display Under Host Computer Integrate Control Blinks Repeats Single Blink 245 5 3 Display Under Host Computer Integrate Control Blinks Repeats Double Blink 248 ...

Page 153: ...tion button for more than 4 seconds Press Inspection Test Operation button once Press Inspection Test Operation button once Or after 30 minutes After 10 seconds Press Inspection Test Operation button once Press Inspection Test Operation button once Indoor unit settings can be made Filter sign time Air flow direction Others Following codes can be checked Malfunction codes Indoor model code Outdoor ...

Page 154: ...o malfunction the remote controller s operation LED blinks and malfunction code is displayed Even if stop operation is carried out malfunction contents are displayed when the inspection mode is entered The malfunction code enables you to tell what kind of malfunction caused operation to stop See page 148 for malfunction code and malfunction contents ...

Page 155: ...nduct all of the following 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 abnormality 3 Press the MODE selector button The left 0 upper digit indication of the malfunction code flashes 4 Malfunction code upper digit diagnosis Press the UP or DOWN butto...

Page 156: ...SiUS30 604 Troubleshooting by Remote Controller Troubleshooting 143 The lower digit of the code changes as shown below when the UP and DOWN buttons are pressed ...

Page 157: ... Outdoor or outside unit model code Model RSXYP RXYP RSEYP RSXYP L RXYQ M REYQ M RWEYQ M Unit Malfunction code Inspection Normal display No display 0 L 0 Malfunction code blinks when a malfunction occurs Unit Malfunction code Inspection Inspection mode Push the button Inspection test operation Push the button Inspection test operation Push the button Inspection test operation Push the button Inspe...

Page 158: ...or group control only Select the indoor unit No to be set with the time mode For wireless remote controller 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 For details refer to the table in next page 4 Define the setting contents Modes 44 45 Define by pushing the timer button After d...

Page 159: ...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 fan speed and air flow direction by each unit Select the unit No with the time mode button Set the fan speed with the button Set the air flow direction with the button 45 Unit No transfer Transfer unit No Select the unit No wit...

Page 160: ... If a malfunction occurs during operation the operation lamp malfunction 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 diagnosed by a combination of operation lamp INSPECTION display of the liquid crystal display and display of malfunction code It also l...

Page 161: ...of moving part of electronic expansion valve Y1E 3E 179 F3 9 9 9 Abnormal discharge pipe temperature 181 F6 9 9 9 Refrigerant overcharged 182 HJ 9 9 9 Water system defect 184 J3 9 9 9 Malfunction of discharge pipe thermistor R3T loose connection disconnection short circuit failure 186 J4 9 9 9 Malfunction of heat exchanger gas pipe thermistor R4T 187 J5 9 9 9 Malfunction of thermistor R2T for suct...

Page 162: ...ress duplication of central remote controller 223 UE 9 9 9 Malfunction of transmission between central remote controller and indoor unit 224 235 UF 9 9 9 Refrigerant system not set incompatible wiring piping 226 UH 9 9 9 Malfunction of system refrigerant system address undefined 227 Centralized Control and Schedule Timer M1 8 or 7 9 9 PC board defect 229 237 M8 8 or 7 9 9 Malfunction of transmissi...

Page 163: ...ormality in water system HJ Abnormal discharge pipe temperature Abnormal Td F3 Abnormal heat exchanger temperature Refrigerant over charge F6 Faulty sensor of discharge pipe temperature Faulty Tdi sensor J3 Faulty sensor of heat exchanger gas pipe thermistor Faulty Tg sensor J4 Faulty sensor of suction pipe temperature Faulty Ts sensor J5 Faulty sensor of receiver temperature Faulty Tl sensor J7 F...

Page 164: ... 7 9 9 7 9 8 8 7 7 J3 9 7 8 7 9 9 7 9 8 7 7 7 9 9 9 8 8 7 9 J4 9 8 7 7 8 7 7 9 8 8 7 9 J5 9 8 7 7 9 7 9 9 8 8 7 7 J7 9 8 7 7 9 9 9 9 8 8 7 7 J9 9 8 7 9 7 7 9 9 8 8 7 7 JA 9 8 7 9 7 9 7 9 8 8 7 7 JC 9 8 7 9 9 7 7 9 8 8 7 7 L1 9 7 8 7 9 9 9 9 8 7 7 7 7 9 9 8 8 7 7 9 8 7 7 7 7 9 9 8 8 7 9 9 8 7 7 7 7 9 9 8 8 9 7 9 8 7 7 7 7 9 9 8 8 9 9 L4 9 7 8 7 9 9 7 9 8 7 7 9 7 7 9 8 8 7 7 L5 9 8 7 7 9 7 9 9 8 8 7...

Page 165: ...page Contents of malfunction Malfunction code Gas shortage Gas shortage alarm U0 Reverse phase Reverse phase error U1 Abnormal power supply voltage Insufficient inverter voltage U2 Inverter open phase phase T Charging error of capacitor in inverter main circuit No implementation of test run U3 Transmission error between indoor and outdoor unit I O transmission error U4 Transmission error between o...

Page 166: ... 7 8 9 7 7 9 9 8 7 7 7 7 7 9 8 8 7 7 U1 9 8 7 7 7 7 9 9 8 8 7 7 U2 9 8 7 7 7 9 7 9 8 8 7 9 U3 9 8 7 7 7 9 9 9 8 8 7 7 U4 9 8 7 7 9 7 7 9 8 8 7 7 U7 9 8 7 7 9 9 9 9 8 8 7 7 U9 9 8 7 9 7 7 9 9 8 8 7 7 UA 9 8 7 9 7 9 7 9 8 8 7 7 UH 9 8 7 9 7 9 9 9 8 8 7 7 UJ UF 9 9 8 8 7 7 9 9 9 9 7 9 9 9 9 9 8 8 8 8 7 7 7 7 Malfunction code 1st digit display section Malfunction code 2nd digit display section 8 ON 9 ...

Page 167: ...nals with the remote controller set to external ON OFF terminal Supposed Causes Actuation of external 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 occurred Indoor unit PC board replacement Actuation of external protection device Change the second code ...

Page 168: ...t be 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 Turn power supply OFF then power ON again Does the system return to normal YES Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Exter...

Page 169: ...Q FXSQ FXMQ FXHQ FXAQ 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 Supposed Causes 208 230V power supply is not provided Defect of float switch or short circuit connector Defect of drain pump Drain clogging upward slope etc Defect of indoor unit PC board Loose connection of co...

Page 170: ...oor unit PC board Loose connection of connector NO NO NO YES YES NO NO YES NO YES NO NO The float switch is connected to X8A of the indoor unit PC board NO The drain pump works when the power supply is reset for the indoor unit The drain pump is connected to X25A or terminals Y1 and Y2 of the indoor unit PC board The voltage of terminals Y1 and Y2 or X25A is 208 230 V within 5minutes of resetting ...

Page 171: ...when output voltage to the fan is maximum Supposed Causes Fan motor lock Disconnected or faulty wiring between fan motor and PC board Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Connect the wiring and turn on again Fix the wiring and turn on again YES NO NO NO YES YES Replace the indoor unit PC board Replace the fa...

Page 172: ...Decision Conditions When fan rotation does not increase Supposed Causes Disconnected short circuited fan motor harnesses or disconnected connectors Faulty fan motor Disconnection and insulation failure Abnormal signal from the fan motor Circuit breakdown Faulty PCB Instantaneous disturbance of power supply voltage Fan motor lock Caused by the motor or external factors Fan does not rotate because f...

Page 173: ...he fan motor NO YES NO YES NO YES NO Are there foreign particles around the fan Are the harness from the fan motor and the harness of A1P fan motor fixed to X20A connected properly Can the fan be removed from the junction connector between the fan motor and A1P and rotated easily with hands YES Turn off the power supply Check the fan motor connector Does the resistance between pins satisfy the jud...

Page 174: ...upply cable 1 Turn off the power supply Measure the resistance between phases of U V W at the motor side connectors three core wire to check that the values are balanced and there is no short circuiting while connector or relay connector is disconnected Red White Black U V W Measure the resistance values between phases U V W ...

Page 175: ...ion 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 energized for a specified amount of time about 30 seconds Supposed Causes Defect of swing motor Defect of connection cable power supply and limit switch Defect of air flow direction adjusting flap cam Defe...

Page 176: ...n again Replace indoor unit PC board NO NO YES NO YES NO YES YES NO Indoor unit is a model equipped with a swing flap function The swing motor works when the power supply is turned off and then back on When the air flow direction flap s cam mechanism is disconnected from the swing motor operation is normal when turned on again The connecting cable has no continuity After turning the swing flap ON ...

Page 177: ...electronic expansion valve Defect of indoor unit PC board Defect of connecting cable Troubleshooting V2781 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred After connecting turn the power supply off and then back on Replace the moving part of the electronic expansion valve YES YES NO NO Replace the connecting cable If you turn the powe...

Page 178: ...ion 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 4 Blue 5 Red 6 Brown 1 White Approx 300Ω Approx 150Ω 2 Yellow Approx 300Ω Approx 150Ω 3 Orange Approx 150Ω 4 Blue Approx 150Ω 5 Red 6 Brown M White 1 Yellow 2 Blue 4 Brown 6 Red 5 Orange 3 φ1 φ2 φ4 φ3 1 White 2 Yellow 3 Orange 4 Blue 5 Red 6 Brown ...

Page 179: ...he 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 board Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Defect of indoor unit PC board Modify the drain piping YES NO NO...

Page 180: ...hen the capacity code is not contained in the PC board s memory and the capacity setting adaptor is not connected 2 When a capacity that doesn t exist for that unit is set Supposed Causes You have forgotten to install the capacity setting adaptor Defect of indoor unit PC board Troubleshooting V2783 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may ...

Page 181: ...ed or shorted while the unit is running Supposed Causes Defect of thermistor R2T for liquid pipe Defect of indoor unit PC board Troubleshooting 2 Refer to thermistor resistance temperature characteristics table on P278 V2784 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Replace the indoor unit PC board Connect the connector and turn...

Page 182: ... while the unit is running Supposed Causes Defect of indoor unit thermistor R3T for gas pipe Defect of indoor unit PC board Troubleshooting 2 Refer to thermistor resistance temperature characteristics table on P278 V2785 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Replace the indoor unit PC board Connect the connector and turn on ...

Page 183: ...ected 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 2 Refer to thermistor resistance temperature characteristics table on P278 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Replace the indoor unit PC board Connect the connector a...

Page 184: ...ecomes disconnected or shorted while the unit is running Supposed Causes Defect of remote controller thermistor Defect of remote controller PC board Troubleshooting Note In case of remote controller thermistor malfunction unit is still operable by suction air thermistor on indoor unit 2 Refer to thermistor resistance temperature characteristics table on P278 Turn power supply OFF then power ON aga...

Page 185: ...osed Causes Faulty main PCB Faulty communication part photo coupler on the main PCB Troubleshooting Turn off the power supply once and then turn it on again Foreign particles electrically conductive are attached on the terminal X1M of the main PCB YES YES Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Does it return normally Remove t...

Page 186: ...ive property of the high pressure switch with the protector circuit Malfunction Decision Conditions When the protector circuit is partially opened For reference Working pressure for the high pressure switch Working pressure 580psi Return pressure 413psi Supposed Causes High pressure switch operation Faulty high pressure switch Faulty main PCB Temporal power failure Faulty high pressure sensor Insu...

Page 187: ...he high pressure sensor is normal and the main PCB pressure detection is also normal In fact high pressure is rising CHECK 1 Refer to page 249 to eliminate the causes of high pressure rise 1 Compare the pressure sensor voltage measurements with pressure gauge readings For the pressure sensor voltage is measured at the connector and converted to pressure in accordance with page 280 2 Compare high p...

Page 188: ... Method of Malfunction Detection Judge the pressure detected by a low pressure sensor with the main PCB Malfunction Decision Conditions When low pressure drops while the compressor is in operation Working pressure 10 1psi Retry 3 times Supposed Causes Abnormal low pressure drop Faulty low pressure sensor Faulty main PCB The stop valve left closed Insufficient heat source water Dirty water heat exc...

Page 189: ...ure sensor characteristics normal 1 Is PCB detector pressure normal 2 Replace the main PCB Replace the low pressure sensor Open the stop valve 1 Compare the pressure sensor voltage measurements with pressure gauge readings For the pressure sensor voltage is measured at the connector and converted to pressure in accordance with page 280 2 Compare low pressure measured with the Service Checker with ...

Page 190: ...B from the UVWN line connected between the inverter and the compressor and detect location signal pattern Malfunction Decision Conditions In normal operation location signal for a triple cycle of frequency applied while in locked operation it is a double cycle and they are detected Retry twice 60 minutes Supposed Causes Inverter compressor lock High differential pressure 72 5psi or more Incorrect ...

Page 191: ...k mode setting using Setting Mode 2 on the outside unit PCB Measure inverter output voltage Note Take measurements while frequency is stable Eliminate the causes The hot gas bypass valve may not be opened Check it NO YES The inverter compressor operates normally Replace the compressor NO Replace the inverter PCB YES Replace the inverter compressor Open the stop valve 1 Difference in pressure betwe...

Page 192: ...board A1P Defect of connecting cable Troubleshooting V3067 YES Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Return to normal Turn power supply off and turn power supply on again Electronic expansion valve is connected to X26A and X28A of outside unit PC board A1P Normal when coil check 1 of the moving part of the electronic expansi...

Page 193: ...ion 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 4 Blue 5 Red 6 Brown 1 White Approx 300Ω Approx 150Ω 2 Yellow Approx 300Ω Approx 150Ω 3 Orange Approx 150Ω 4 Blue Approx 150Ω 5 Red 6 Brown M White 1 Yellow 2 Blue 4 Brown 6 Red 5 Orange 3 φ1 φ2 φ4 φ3 1 White 2 Yellow 3 Orange 4 Blue 5 Red 6 Brown ...

Page 194: ...eshooting Connect the Service Checker Restart operation after resetting operation 1 Compare the resistance values of the discharge pipe thermistor with measurements of a surface thermometer For temperature and resistance characteristics of a thermistor refer to page 278 279 2 Compare the discharge pipe temperature checked by the Service Checker with the resistance of the thermistor refer to 1 The ...

Page 195: ... of refrigerant using suction pipe temperature and subcooling heat exchanger outlet temperature during check operation Malfunction Decision Conditions When the suction pipe temperature and the subcooling heat exchanger outlet temperature during check operation drop and become below the evaporation temperature Supposed Causes Excessive refrigerant charging Suction pipe thermistor removed Subcooling...

Page 196: ... to eliminate the causes of wet operation CHECK 4 Mount the thermistor properly before operation Replace the thermistor if it functions abnormally before operation Continue operation Is the thermistor mounted properly Check the mounting condition of the suction pipe thermistor and the subcooling heat exchanger outlet thermistor temperature sensor mounted to piping Remove the suction pipe thermisto...

Page 197: ...as Detect turned off interlock circuit When interlock setting is provided Malfunction Decision Conditions When temperature on the heat exchanger gas side R4T drops remarkably with the smallest operation step 52 Hz of the compressor With interlock setting provided when interlock circuit is turned off Supposed Causes Clogged water piping system Insufficient heat exchanger water Dirty heat exchanger ...

Page 198: ... the thermistor sensor if any of its characteristics are abnormal Is the heat exchanger dirty YES Clean the heat exchanger YES NO Is the connection between the thermistor on the heat exchanger gas side R4T and the low pressure sensor S1NPL proper Disconnect the connection between the compressor and the inverter and turn on the power transistor check mode setting using Setting Mode 2 on the outside...

Page 199: ...open circuit in the discharge pipe temperature thermistor is detected Supposed Causes Defect of thermistor R3T for outside unit discharge pipe Defect of outside unit PC board A1P Troubleshooting V3072 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Resistance is normal when measured after disconnecting the thermistor R3T from the outs...

Page 200: ... or open Supposed Causes Faulty heat exchanger gas pipe thermistor R4T Faulty outside unit PC board Troubleshooting 2 Refer to thermistor resistance temperature characteristics table on P 278 V3075 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Is the resistance measured after removing the thermistor R4T from outside unit PC board no...

Page 201: ...temperature thermistor is detected Supposed Causes Defect of thermistor R2T for outside unit suction pipe Defect of outside unit PC board A1P Troubleshooting 2 Refer to thermistor resistance temperature characteristics table on P278 V3073 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Resistance is normal when measured after disconne...

Page 202: ...pen Supposed Causes Faulty liquid pipe thermistor R6T Faulty outside unit PC board Troubleshooting 2 Refer to thermistor resistance temperature characteristics table on P278 V3075 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Is the resistance measured after removing the thermistor R6T from outside unit PC board normal 3 5 kΩ to 360...

Page 203: ...or is short circuited or open Supposed Causes Faulty receiver gas pipe thermistor R5T Faulty outside unit PC board Troubleshooting 2 Refer to thermistor resistance temperature characteristics table on P278 V3075 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Is the resistance measured after removing the thermistor R5T from outside un...

Page 204: ...cable Models RWEYQ60 72 84MTJU Method of Malfunction Detection Malfunction is detected from the pressure detected by the high pressure sensor Malfunction Decision Conditions When the discharge pipe pressure sensor is short circuit or open circuit Supposed Causes Defect of high pressure sensor system Connection of low pressure sensor with wrong connection Defect of outside unit PC board ...

Page 205: ...wer switch before connect or disconnect connector or parts damage may be occurred The relationship between the 1 VH and high pressure is normal see 2 when voltage is measured between X46A pins 1 and 3 of outside unit PC board A1P see 1 Replace the high pressure sensor Connect the high pressure sensor and turn on again NO NO Replace outside unit PC board A1P YES YES The high pressure sensor is conn...

Page 206: ...Applicable Models RWEYQ60 72 84MTJU Method of Malfunction Detection Malfunction is detected from pressure detected by low pressure sensor Malfunction Decision Conditions When the suction pipe pressure sensor is short circuit or open circuit Supposed Causes Defect of low pressure sensor system Connection of high pressure sensor with wrong connection Defect of outside unit PC board ...

Page 207: ...switch before connect or disconnect connector or parts damage may be occurred The relationship between the 1 VH and low pressure is normal see 2 when voltage is measured between X45A pins 2 and 3 of outside unit PC board A1P see 1 Replace the low pressure sensor Connect low pressure sensor property and restart system NO NO Replace outside unit PC board A1P YES YES The low pressure sensor is connec...

Page 208: ...functions during synchronized operation In case of IPM malfunction Supposed Causes Faulty outdoor PC board A2P IPM failure Current sensor failure Failure of drive circuit Troubleshooting YES NO Turn OFF the power supply once and then turn it ON again Does it return normally It is believed that external factors noise etc other than failure caused the malfunction Replace the compressor and the compr...

Page 209: ...Causes Actuation of fin thermal Actuates above 98 C Defect of inverter PC board Defect of fin thermistor Troubleshooting 2 Refer to thermistor resistance temperature characteristics table on P278 V2811 Resistance check of the radiator fin thermistor Defect of power unit radiation Intake port is clogged Radiator fin is dirty Outdoor temperature is high NO Replace the thermistor YES Abnormal Is rese...

Page 210: ...ction Higher voltage than actual is displayed when the inverter output voltage is checked by tester V2812 Caution Be sure to turn off power switch 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 of power supply voltage Must be measured when frequency is stable Replace the compressor Com...

Page 211: ... Remote Controller Display L8 Applicable Models RWEYQ60 72 84MTJU Method of Malfunction Detection Malfunction is detected by current flowing in the power transistor Malfunction Decision Conditions When overload in the compressor is detected Supposed Causes Compressor overload Compressor coil disconnected Defect of inverter PC board ...

Page 212: ...measured when frequency is stable Compressor overload Inspection of the compressor and refrigerant system is required Compressor inspection Inspect according to the diagnosis procedure for odd noises vibration and operating status of the compressor NO Replace the inverter PC board YES NO Reset and restart NO The secondary current of the inverter is higher than 25 1 A for each phase Replace the com...

Page 213: ...hecked by tester Inverter output voltage check Inverter output voltage is not balanced Normal if within 5V of power supply Must be measured when frequency is stable Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Unsatisfactory pressure equalization Check refrigerant system Compressor inspection Inspect according to the diagnosis proc...

Page 214: ...unction Detection Check the communication state between inverter PC board and control PC board by micro computer Malfunction Decision Conditions When the correct communication is not conducted in certain period Supposed Causes Malfunction of connection between the inverter PC board and outside unit control PC board Defect of outside unit control PC board transmission section Defect of inverter PC ...

Page 215: ...nitor green on the inverter P C B is blinking The voltage between two pins of L1A L2A and L3A on the inverter unit is 208 230 V Defect of outside unit main PC board or defect of inverter PC board Check the noise filter Z1F for disconnection and check the power supply wiring of the inverter PC board Replace inverter PC board When the LC malfunction occur again replace control PC board YES NO YES NO...

Page 216: ...voltage is detected in PC board Malfunction Decision Conditions When the resistance value of thermistor becomes a value equivalent to open or short circuited status Malfunction is not decided while the unit operation is continued P1 will be displayed by pressing the inspection button Supposed Causes Open phase Voltage imbalance between phases Defect of main circuit capacitor Defect of inverter PC ...

Page 217: ...ly voltage record power supply voltage between 3 phases L1 L2 L2 L3 L3 L1 for about one continuous week Open phase Normalize field cause Power supply voltage imbalance Explanation for users Fix power supply voltage imbalance YES YES NO Imbalance in supplied voltage is in excess of 10V 1 Open phase When voltage monitoring is possible 1 Measure voltage at the X1M power supply terminal block 2 Measur...

Page 218: ...atus Malfunction is not decided while the unit operation is continued P4 will be displayed by pressing the inspection button Supposed Causes Defect of radiator fin temperature sensor Defect of inverter PC board Troubleshooting 2 Refer to thermistor resistance temperature characteristics table on P278 V2818 After resetting restart YES YES Is the resistance of thermistor correct Is the resetting pos...

Page 219: ... not the field setting or the type of the PC board is correct through the communication date is judged Supposed Causes Faulty or no field setting after replacing main PC board Mismatching of type of PC board Troubleshooting YES Reset and then restart YES YES Note Type of PC board mismatching includes Main PC board Inverter PC board for compressor Fan driver PC board NO NO NO Caution Be sure to tur...

Page 220: ...ficient gas using low pressure or difference in temperature between the suction pipe and the heat exchanger Malfunction Decision Conditions In cooling Low pressure of 36 2psi or less continues for 30 minutes In heating Suction gas superheated degree of 36 F or more continues for 60 minutes Abnormality is not confirmed and operation is continued Supposed Causes Insufficient gas or clogged refrigera...

Page 221: ... pressure measured by the Service Checker with pressure sensor measurements refer to 1 CHECK 2 Refer to page 250 to eliminate the causes of low pressure drop In cooling NO NO Connect the Service Checker After resetting operation with a remote controller restart operation Is PCB detection temperature normal 4 Replace the main PCB Replace the thermistor 3 Compare the thermistor resistance with surfa...

Page 222: ... made between phases Supposed Causes Power supply reverse phase Power supply open phase Defect of outside PC board A1P Troubleshooting V2820 Operation is normal if one place of power supply line phase is replaced Fix the open phase Requires inspection of field power supply section Reverse phase Counter measure of the problem is completed by phase replacement Replace outside unit PC board A1P YES Y...

Page 223: ...of Malfunction Detection Detection of voltage of main circuit capacitor built in the inverter and power supply voltage Malfunction Decision Conditions When the capacitor above only has a voltage of 190V or less Supposed Causes Abnormal power supply voltage Instantaneous power failure Open phase Faulty inverter PCB Faulty control PCB Faulty compressor Faulty wiring in the main circuit Faulty connec...

Page 224: ...e power supply and then set the RUN switch to ON Replace the inverter PCB A2P If the inverter PCB is significantly damaged check for the compressor Check for every wire connection Continue the compressor operation It is supposed that the faulty power supply results from external causes such as instantaneous power failure YES YES NO NO YES Check for the power supply conditions Does the voltage fall...

Page 225: ...ditions 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 Outside unit P C B Press the BS4 on P C board on the master outside unit for 5 seconds or more to execute check operation Replace the main P C board on the outside unit NO YES Caution Be sure to turn off pow...

Page 226: ...ion Detection Microcomputer checks if transmission between indoor and outside units is normal Malfunction Decision Conditions When transmission is not carried out normally for a certain amount of time Supposed Causes Indoor to outdoor outside to outside unit transmission wiring F1 F2 disconnection short circuit or wrong wiring Outside unit power supply is OFF System address doesn t match Defect of...

Page 227: ... indoor outside unit transmission wiring YES NO NO YES Has the indoor or outside unit PC board been replaced or has the indoor outside or outside outside unit transmission wiring been modified All indoor unit remote controllers of the same refrigerant system display U4 NO Outside unit PC board microcomputer monitor HAP blinks NO NO NO Operation ready lamp H2P is blinking Lamp does not go off for 1...

Page 228: ...unit PC board Defect of remote controller PC board Malfunction of transmission caused by noise Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred V2823 NO YES YES NO Replace indoor unit PC board Set one remote controller to SLAVE turn the power supply off once and then back on There is possibility of malfunction caused by...

Page 229: ...function Decision Conditions When transmission is not carried out normally for a certain amount of time Supposed Causes Improper connection of transmission wiring between outside unit and external control adaptor for outdoor unit Improper cool heat selection Improper cool heat unified address outside unit external control adaptor for outdoor unit Defect of outside unit PC board A1P Defect of exter...

Page 230: ...ECT to IND YES Fix the outside units multi connection transmission wiring and reset power NO Is the outside units multi connection transmission wiring normal Is the indoor outside unit transmission wiring normal NO YES Fix the indior outside unit transmission wiring The cool heat unified address for outside units in outside outside unit transmission is duplicated Set the address correctly YES NO N...

Page 231: ...ntinue for specified period Supposed Causes Malfunction of transmission between main and sub remote controller Connection between sub remote controllers Defect of remote controller PC board Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred V2825 SS1 of both remote controllers is set to SUB Set SS1 to MAIN the power suppl...

Page 232: ...Detect the malfunction signal of any other indoor unit within the system concerned Malfunction Decision Conditions When the malfunction decision is made on any other indoor unit within the system concerned Supposed Causes Malfunction of transmission within or outside of other system Malfunction of electronic expansion valve in indoor unit of other system Defect of PC board of indoor unit in other ...

Page 233: ...nutes or more NO NO Refer to failure diagnosis for U4 malfunction code YES YES U9 has been displayed for 2 minutes or more NO Turn on all indoor units Refer to failure diagnosis for A1 malfunction code NO YES The A1 display blinks on the remote controllers of other units within the same refrigerant system Refer to failure diagnosis for UA malfunction code YES The UA display blinks on the remote co...

Page 234: ...the remote controller using the outside unit PCB Malfunction Decision Conditions When any of the followings is detected failure is instantly confirmed When there is a problem in the combination of the indoor and outside units When there is a problem in the combination of the indoor unit and the remote controller Supposed Causes Excess of connected indoor units Defect of outside unit PC board A1P M...

Page 235: ...splaying UA and indoor units connected to the same refrigerant system is within connectable number of unit Normal NO NO There are too many indoor units within the same refrigerant system Push and hold the RESET button on the outside unit PC board for 5 seconds YES Is the outside P C board replaced to spare parts P C board YES The refrigerant classification has not been set yet NO YES Does a malfun...

Page 236: ... Conditions The malfunction decision is made as soon as the abnormality aforementioned is detected Supposed Causes Address duplication of centralized remote controller Defect of indoor unit PC board Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred V2828 Replace indoor unit PC board Address duplication of central remote ...

Page 237: ...of Malfunction Detection Microcomputer checks if transmission between indoor unit and centralized controller is normal Malfunction Decision Conditions When transmission is not carried out normally for a certain amount of time Supposed Causes Malfunction of transmission between optional controllers for centralized control and indoor unit Connector for setting master controller is disconnected Failu...

Page 238: ... wired incorrectly Is the master controller s connector for setting 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 board Reset power supply simultaneously for all optional controllers for centralized control NO YES NO YES YES NO NO Turn indoor unit s powe...

Page 239: ...door unit Failure to execute wiring check operation Defect of indoor unit PC board Troubleshooting Note Test operation may not be successful if carried out after the outside unit has been off for more than 12 hours or if it is not carried out after running all connected indoor units in the fan mode for at least an hour Caution Be sure to turn off power switch before connect or disconnect connector...

Page 240: ...door units RWEYQ60 72 84MTJU Method of Malfunction Detection Detect an indoor unit with no auto address setting Malfunction Decision Conditions The malfunction decision is made as soon as the abnormality aforementioned is detected Supposed Causes Improper connection of transmission wiring between outside unit and outside unit outside control adaptor Defect of indoor unit PC board Defect of outside...

Page 241: ...on or after an indoor or outside unit PC board has been replaced Is indoor outside and outside outside unit transmission wiring normal YES Normal NO Does a malfunction occur NO Does a UH malfunction occur for all indoor units in the system YES NO Does a malfunction occur even after 12 minutes elapses from the time when electricity is introduced to indoor and outside units YES Replace indoor unit P...

Page 242: ...ontroller Display M1 Applicable Models Central remote controller Method of Malfunction Detection Detect an abnormality in the DIII NET polarity circuit Malfunction Decision Conditions When polarity and polarity are detected at the same time Supposed Causes Defect of central remote controller PC board Troubleshooting Replace the central remote controller ...

Page 243: ...ection Detect the malfunction according to DIII NET transmission data The system will be automatically reset Malfunction Decision Conditions When no master controller is present at the time of the startup of slave controller When the centralized controller which was connected once shows no response Supposed Causes Malfunction of transmission between optional controllers for centralized control Def...

Page 244: ...ntralized control and replace the PC board of the one that is unable to control the indoor unit NO NO Fix the wiring correctly YES YES Has a once connected optional controller for centralized control been disconnected or its address changed Turn on power supply for all optional controllers for centralized control Reset power supply simultaneously for all optional controllers for centralized contro...

Page 245: ...ect the malfunction according to DIII NET transmission data Malfunction Decision Conditions When the schedule timer is set to individual use mode other central component is present When multiple master controller are present When the remote control adapter is present Supposed Causes Improper combination of optional controllers for centralized control More than one master controller is connected De...

Page 246: ...that the connector for setting master controller is connected to one controller for centralized control and reset the power supply for all optional controllers for centralized control simultaneously Disconnect the connector for setting master controller from the master controller connect to another optional controller for centralized control and simultaneously reset all optional controllers for ce...

Page 247: ...onditions Two units are both set to master controller mode or slave controller mode Supposed Causes Address duplication of centralized remote controller Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Are two or more central remote controllers connected Disconnect all central remote controllers except one and reset the...

Page 248: ... Malfunction Detection Microcomputer checks if transmission between indoor unit and centralized controller is normal Malfunction Decision Conditions When transmission is not carried out normally for a certain amount of time Supposed Causes Malfunction of transmission between central remote controller and indoor unit Disconnection of connector for setting master controller or individual combined sw...

Page 249: ...d incorrectly Is the master controller s connector for setting 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 board Reset power supply simultaneously for all optional controllers for centralized control NO YES NO YES YES NO NO Turn indoor unit s power sup...

Page 250: ...circuit Malfunction Decision Conditions When polarity and polarity are detected at the same time Supposed Causes Defect of schedule timer PC board Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Reset power supply Does the system return to normal YES NO External factor other than equipment malfunction noise etc Replace...

Page 251: ...unction according to DIII NET transmission data The system will be automatically reset Malfunction Decision Conditions When no master controller is present at the time of the startup of slave controller When the optional controllers for centralized control which was connected once shows no response Supposed Causes Malfunction of transmission between optional controllers for centralized control Def...

Page 252: ...zed control and replace the PC board of the one that is unable to control the indoor unit YES NO Fix the wiring correctly YES NO Has a once connected optional controller for centralized control been disconnected or its address changed Turn on power supply for all optional controllers for centralized control Reset power supply simultaneously for all optional controllers for centralized control YES ...

Page 253: ...ection Detect the malfunction according to DIII NET transmission data Malfunction Decision Conditions When the schedule timer is set to individual use mode other central component is present When multiple master controller are present Supposed Causes Improper combination of optional controllers for centralized control More than one master controller is connected Defect of PC board of optional cont...

Page 254: ... the connector for setting master controller when the malfunction is cleared is defective and must be replaced Reset the power supply for all optional controllers for centralized control simultaneously YES YES NO Is the schedule timer connected Are there two or more optional controllers for centralized control connected with the connector for setting master controller YES Is the schedule timer s i...

Page 255: ...on Decision Conditions When two or more schedule timers are connected Supposed Causes Address duplication of optional controller for centralized control Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred V2840 Are two or more centralized controller connected Reset the power supply for the centralized controller Disconnect...

Page 256: ...l models of indoor units Unified ON OFF controller Method of Malfunction Detection Detect the malfunction according to DIII NET transmission data Malfunction Decision Conditions Supposed Causes Malfunction of transmission between optional controller and indoor unit Connector for setting master controller is disconnected Defect of unified ON OFF controller Defect of indoor unit PC board Malfunction...

Page 257: ...ster 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 board Reset power supply for all optional controllers for centralized control simultaneously NO YES NO YES YES NO YES Turn the power supply of the indoor unit on YES NO NO YES NO YES NO Has a once connected ind...

Page 258: ...itions When the centralized controller which was connected once shows no response The control ranges are overlapped When multiple master central controller are present When the schedule timer is set to individual use mode other central controller is present When the wiring adaptor for electrical appendices is present Supposed Causes Address duplication of central remote controller Improper combina...

Page 259: ...or schedule timer NO YES YES NO NO Fix the wiring correctly Set reset switch to normal NO NO YES YES YES Is the power supply turned on for all optional controllers for centralized control Reset power supply simultaneously for all optional controllers for centralized control NO YES Has a once connected optional controller for centralized control been disconnected or its address changed Is the centr...

Page 260: ...imultaneously Arrange so that the connector for setting master control is connected to one controller for centralized control and reset the power supply for all optional controllers for centralized control simultaneously Disconnect the connector for setting master control from the master controller connect to another optional controller for centralized control and simultaneously reset all optional...

Page 261: ...trol address group No is not set for indoor unit Improper address setting Improper wiring of transmission wiring Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred V2844 Is the switch for setting each address set correctly Is the transmission wiring disconnected or wired incorrectly Replace the PC board of the unified ON ...

Page 262: ...ore than 113 F Does the water pump function normally Is the strainer or the like clogged Is the suction air temperature not more than 80 6 F Is air or else mixed in the refrigerant system Is the indoor temperature not more than 80 6 F Is the connector properly connected Are the thermistor resistance characteristics normal Can the fan motor be rotated with hands Are the motor coil resistance and in...

Page 263: ...stics normal Does the pressure value of the Service Checker match the reading of the pressure sensor Check for the thermistor resistance and connection Check for the thermistor resistance and connection Does the pressure value of the Service Checker match the reading of the pressure sensor Are the coil resistance and insulation normal Are the voltage characteristics normal Check for the thermistor...

Page 264: ... F or more Discharge gas superheated degree 113 F or more excluding when it is immediately after startup under drop control or other specific conditions The values above must be used only for reference purposes Even it is operated within the range above operation may be normal in other conditions CHECK 3 Check for causes of overheat operation Referring to the Fault Tree Analysis FTA shown below id...

Page 265: ... 5 Are the coil resistance and insulation normal Is the connector properly connected Are the thermistor resistance characteristics normal Is the connector properly connected Are the thermistor resistance characteristics normal Are the coil resistance and insulation normal Are the voltage characteristics normal Is the connector properly connected Are the thermistor resistance characteristics normal...

Page 266: ...hin the range where the receiver is capable of absorbing Low pressure rises due to decreased compressor output CHECK 5 Check for excessive refrigerant charging In case of the VRV judgment must be made based on operation conditions in relation to pressure control and electronic expansion valve control Refer to the following criteria to make such decisions Diagnosis of excessive refrigerant charging...

Page 267: ...ischarges pipe or low pressure droop control Any one of electronic expansion valves opens fully The open degree of the indoor unit electronic expansion valve increases CHECK 6 Check for inadequate refrigerant quantity In case of the VRV judgment must be made based on operation conditions in relation to pressure control and electronic expansion valve control Refer to the following criteria to make ...

Page 268: ...e for Mounting Dismounting of Switch Box 255 Part 7 Procedure for Mounting Dismounting of Switch Box 1 Procedure for Mounting Dismounting of Switch Box 256 1 1 Procedure for Dismounting 256 1 2 Procedure for Mounting 256 ...

Page 269: ...m the top plate the stop valve mounting plate and the bottom frame in a total of 6 places 4 With attention paid not to make the switch box support leg into contact with the side panel rotate the switch box to pull out it while referring to Figure on the right In order to pull out the switch box check to be sure no wirings get stuck with the switch box Procedure for Mounting Dismounting of Switch B...

Page 270: ...SiUS30 604 Procedure for Mounting Dismounting of Switch Box Procedure for Mounting Dismounting of Switch Box 257 Connect Disconnect the wirings Screw Unscrew the mounting screws A1P ...

Page 271: ...Procedure for Mounting Dismounting of Switch Box SiUS30 604 258 Procedure for Mounting Dismounting of Switch Box ...

Page 272: ...3 Indoor Unit 267 2 4 BS Unit 271 3 List of Electrical and Functional Parts 272 3 1 Outside Unit 272 3 2 Indoor Side 273 4 Option List 276 4 1 Optional Accessories 276 5 Thermistor Resistance Temperature Characteristics 278 6 Pressure Sensor 280 7 Method of Replacing the Inverter s Power Transistors and Diode Modules 281 7 1 Method of Replacing the Inverter s Power Transistors and Diode Modules 28...

Page 273: ...Piping Diagrams SiUS30 604 260 Appendix 1 Piping Diagrams 1 1 Outside Units RWEYQ60MTJU RWEYQ72MTJU RWEYQ84MTJU 4D055410 ...

Page 274: ...4MVJU FXLQ 12M 18M 24MVJU FXNQ 12M 18M 24MVJU R1T Thermistor for suction air temperature R2T Thermistor for liquid line temperature R3T Thermistor for gas line temperature J DU220 602J Heat exchanger Gas piping connection port Liquid piping connection port Fan R3T R1T Electronic expansion valve Filter Filter R2T Capacity GAS Liquid 07 09 12 18M φ1 2 φ1 4 24 30 36 48M φ5 8 φ3 8 ...

Page 275: ...Piping Diagrams SiUS30 604 262 Appendix FXDQ Refrigerant pipe connection port diameters 4D043864H Model Gas Liquid FXDQ07M 09M 12M 18MVJU φ1 2 φ1 4 FXDQ24MVJU φ5 8 φ3 8 ...

Page 276: ...SiUS30 604 Piping Diagrams Appendix 263 1 3 BS Unit BSVQ36MVJU BSVQ60MVJU 4D045338 ...

Page 277: ...Wiring Diagrams SiUS30 604 264 Appendix 2 Wiring Diagrams 2 1 Outside Unit RWEYQ60MTJU RWEYQ72MTJU RWEYQ84MTJU 3D054502A ...

Page 278: ...SiUS30 604 Wiring Diagrams Appendix 265 2 2 Outside Unit Field Wiring RWEYQ60 72 84 144 168 216 252MTJU Operation System Heat Recovery 3D055418 ...

Page 279: ...Wiring Diagrams SiUS30 604 266 Appendix RWEYQ60 72 84 144 168 216 252MTJU Operation System Heat Pump 3D055419 ...

Page 280: ...SiUS30 604 Wiring Diagrams Appendix 267 2 3 Indoor Unit FXFQ12M 18M 24M 30M 36MVJU FXDQ07M 09M 12M 18M 24MVJU 3D042620B 3D050501A ...

Page 281: ...Wiring Diagrams SiUS30 604 268 Appendix FXSQ12M 18M 24M 30M 36M 48MVJU FXMQ30M 36M 48MVJU 3D043177A 3D043176A ...

Page 282: ...SiUS30 604 Wiring Diagrams Appendix 269 FXAQ07M 09M 12M 18M 24MVJU FXHQ12M 24M 36M 3D046039C 3D048116 ...

Page 283: ...Wiring Diagrams SiUS30 604 270 Appendix FXLQ12M 18M 24MVJU FXNQ12M 18M 24MVJU 3D045644A ...

Page 284: ...SiUS30 604 Wiring Diagrams Appendix 271 2 4 BS Unit BSVQ36M 60MVJU 3D045069A ...

Page 285: ...ls Electronic expansion valve Subcool Y2E Fully closed 0pls Fully open 2000pls Pressure protection Highpressure switch For M1C HPS OFF 580 Psi ON 435 21 75Psi Low pressure sensor S1NPL OFF 10 15Psi Fusible plug Open 158 167 F Temperature protection Discharge gas temperature protection Discharge pipe thermistor R3T OFF 275 F Inverter fin temperature protection Radiator fin thermistor R1T OFF 188 6 ...

Page 286: ...r for Heat Exchanger High Temp R3T ST8605 3 φ8 L630 20kΩ 77 F Thermistor Heat Exchanger R2T ST8602A 3 φ6 L630 20kΩ 77 F Others Float Switch S1L FS 0211 Fuse F1U 250V 5A φ5 2 Transformer T1R TR25H25R0 Parts Name Symbol Model Remark FXDQ 07MVJU FXDQ 09MVJU FXDQ 12MVJU FXDQ 18MVJU FXDQ 24MVJU Remote Controller Wired Remote Controller BRC1C71 Option Wireless Remote Controller BRC4C82 Motors Fan Motor ...

Page 287: ...C4C82 Motors Fan Motor M1F 1φ160W 1φ270W 1φ430W Thermal protector 275 F OFF 188 6 F ON Capacitor for Fan Motor C1R 6µF 450V 9µF 450V 8µF 450V Thermistors Thermistor Suction Air R1T ST8601A 5 φ4 L1000 20kΩ 77 F Thermistor for Heat Exchanger High Temp R3T ST8605A 4 φ8 L800 20kΩ 77 F Thermistor Heat Exchanger R2T ST8602A 4 φ6 L800 20kΩ 77 F Others Float switch S1L FS 0211 Fuse F1U 250V 5A φ5 2 250V 1...

Page 288: ...RC1C71 Option Wireless Remote Controller Motors Fan Motor M1F 1φ25W 1φ35W Thermal protector 275 F OFF 248 F ON Capacitor for Fan Motor C1R 0 5µF 450V 1 5µF 450V 2 0µF 450V Thermistors Thermistor Suction Air R1T ST8601 6 φ4 L1250 20kΩ 77 F Thermistor for Heat Exchanger High Temp R3T ST8605 9 φ8 L2500 20kΩ 77 F Thermistor for Heat Exchanger R2T ST8602A 9 φ6 L2500 20kΩ 77 F Others Fuse F1U AC250V 5A ...

Page 289: ...Option List SiUS30 604 276 Appendix 4 Option List 4 1 Optional Accessories Outside Unit 3D055420 ...

Page 290: ...ic Hardware intelligent Touch Controller DCS601C71 Air Conditioning management system that can be controlled by a compact all in one unit Option Software Web DCS004A71 Monitors and controls the air conditioning system using the Internet and Web browser application on a PC Communication Line 2 Interface for use in BACnet DMS502A71 Interface unit to allow communications between VRV and BMS Operation...

Page 291: ... 4 8 44 05 136 4 58 5 74 48 2 9 41 95 138 2 59 5 14 50 0 10 39 96 140 0 60 4 96 51 8 11 38 08 141 8 61 4 79 53 6 12 36 30 143 6 62 4 62 55 4 13 34 62 145 4 63 4 46 57 2 14 33 02 147 2 64 4 30 59 0 15 31 50 149 0 65 4 16 60 8 16 30 06 150 8 66 4 01 62 6 17 28 70 152 6 67 3 88 64 4 18 27 41 154 4 68 3 75 66 2 19 26 18 156 2 69 3 62 68 0 20 25 01 158 0 70 3 50 69 8 21 23 91 159 8 71 3 38 71 6 22 22 8...

Page 292: ... 33 92 249 8 121 7 26 71 6 22 228 05 161 6 72 32 78 251 6 122 7 06 73 4 23 218 24 163 4 73 31 69 253 4 123 6 87 75 2 24 208 90 165 2 74 30 63 255 2 124 6 69 77 0 25 200 00 167 0 75 29 61 257 0 125 6 51 78 8 26 191 53 168 8 76 28 64 258 8 126 6 33 80 6 27 183 46 170 6 77 27 69 260 6 127 6 16 82 4 28 175 77 172 4 78 26 79 262 4 128 6 00 84 2 29 168 44 174 2 79 25 91 264 2 129 5 84 86 0 30 161 45 176...

Page 293: ...L PH Detected Pressure High Side PL Detected Pressure Low Side 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 VL Low pressure V Voltage V Output Voltage VH VL Detected Pressure V3053 psi 652 580 507 435 362 290 217 145 72 0 72 725 ...

Page 294: ...placing the Inverter s Power Transistors and Diode Modules Decision according to continuity check by analog tester Before checking disconnect the electric wiring connected to the power transistor and diode module Inverter PC board A1P X10A L1 P1 Electronic circuit Inverter P C Board P2 IGBT X11A U V W N L1 L2 L3 X10A DM N3 Fasten Tab P3 L2 L3 PC0208 X11A Pin U V W N P2 P1 P3 N3 V2895 ...

Page 295: ...nverter PC Board Decision If other than given above the power unit is defective and must be replaced Note If using a digital tester and continuity may be reversed Diode Module Decision If other than given above the diode module is defective and must be replaced Note If using a digital tester and continuity may be reversed ...

Page 296: ...SiUS30 604 Precautions for New Refrigerant R 410A 283 Part 9 Precautions for New Refrigerant R 410A 1 Precautions for New Refrigerant R 410A 284 1 1 Outline 284 1 2 Service Tools 286 ...

Page 297: ...gerant mixture of two or more refrigerants having similar boiling points 3 The design pressure is different at each product Please refer to the installation manual for each product Reference 1 MPa 10 19716 kgf cm2 1 MPa 145 psi HFC units Units using new refrigerants HCFC units Refrigerant name R 407C R 410A R 22 Composing substances Non azeotropic mixture of HFC32 HFC125 and HFC134a 1 Quasi azeotr...

Page 298: ...New Refrigerant R 410A 285 Thermodynamic characteristic of R 410A Temperature ºC Steam pressure kPa Liquid Vapor Density kg m3 Liquid Vapor Specific heat at constant pressure kJ kgK Liquid Vapor Specific enthalpy kJ kg Liquid Vapor Specific entropy kJ KgK Liquid Vapor ...

Page 299: ... 22 Gauge manifold Charge hose 2Do not use the same tools for R 22 and R 410A 2Thread specification differs for R 410A and R 407C Gas detector 2The same tool can be used for HFCs Vacuum pump pump with reverse flow preventive function 2To use existing pump for HFCs vacuum pump adaptor must be installed Weighting instrument Flaring tool Clutch type 2For R 410A flare gauge is necessary Torque wrench ...

Page 300: ...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 pipe extension margin adjustment can be used Flare gauge Nominal size 1 4 3 8 1 2 5 8 3 4 Tube O D Do 6 35 9 52 12 70 15 88 19 05 Class 2 R 410A 9 1 13 2 16 6 19 7 24 0 Class 1 Conventional 9 0 13 0 ...

Page 301: ...mum 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 14 6 psi 5 torr or 5000 micron or 755 mmHg UNF1 2 20 5 16 Flare with adapter Differences 2 Equipped with function to prevent reverse oil flow 2 Previous vacuum pump can be used by installing adapter Nominal size Class 1 Class 2...

Page 302: ... Since HFCs do not contain chlorine new tester detects hydrogen 5 Refrigerant oil 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 period of time Differences 2 Can be used for R 410A and R 22 units 6 Gauge manifold for R 410A Specifications 2 High pressure gauge 15 to 770 psi 76 cmHg to...

Page 303: ...ssure 3685 psi 259 kg cm2 2 Available 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 Weigher for refrigerant charge Specifications 2 High accuracy TA101A for 10 kg cylinder 2g TA101B for 20 kg cylinder 5g 2 Equipped with pressure resistant sight glass ...

Page 304: ...nt R 410A Precautions for New Refrigerant R 410A 291 Regarding purchasing of service tools please contact following address Daikin U S Corporation Dallas Office 1645 Wallace Dr Ste 110 Carrollton TX 75006 Tel 1 972 245 1510 Fax 1 972 245 1038 ...

Page 305: ...Precautions for New Refrigerant R 410A SiUS30 604 292 Precautions for New Refrigerant R 410A ...

Page 306: ...te Control Blinks Repeats Single Blink 245 Drain Level above Limit 166 Drain Pump Control 83 E E1 172 E3 173 E4 175 E5 177 E9 179 Error of External Protection Device 154 F F3 181 F6 182 Fan Motor M1F Lock Overload 158 Faulty Field Setting after Replacing Main PC Board or Faulty Combination of PC Board 206 Field Setting 99 Field Setting from Outside Unit 110 Setting by dip switches 110 Setting by p...

Page 307: ...r and Outside Units in the Same System 219 Malfunction of Transmission between Indoor Units 213 Malfunction of Transmission between Inverter and Control PC Board 201 Malfunction of Transmission between Master and Slave Remote Controllers 218 Malfunction of Transmission between Optional Controllers for Centralized Control 230 238 Malfunction of Transmission between Outside Units 216 Malfunction of ...

Page 308: ... BS Units 23 Indoor Units 24 Outside Units 16 Standby 61 Startup Control 62 Stop 59 T Test Operation 94 Procedure and Outline 94 Thermistor Resistance Temperature Characteristics 278 Thermostat Sensor in Remote Controller 86 Troubleshooting OP Central Remote Controller 229 Troubleshooting OP Schedule Timer 235 Troubleshooting OP Unified ON OFF Controller 243 U U0 207 U1 209 U2 210 U3 212 U4 213 U5...

Page 309: ...SiUS39 601 iv Index ...

Page 310: ...Unit Setting by dip switches 110 Field Setting from Outside Unit 110 Mode changing procedure 111 Freeze Prevention 92 Functional Parts Layout 41 G Gauge manifold for R 410A 289 H Heater Control 90 Hot Start Control In Heating Operation Only 89 I Improper Combination of Optional Controllers for Centralized Control 232 240 Indoor 221 Inverter Compressor Abnormal 197 Inverter Current Abnormal 198 Inv...

Page 311: ... Unit 261 Outside Units 260 Power Supply Insufficient or Instantaneous Failure 210 Pressure Sensor 280 Procedure for Mounting Dismounting of Switch Box 256 Procedure for Dismounting 256 Procedure for Mounting 256 R Refrigerant oil 289 Refrigerant Overcharged 182 Refrigerant System not Set Incompatible Wiring Piping 226 Remote Controller Self Diagnosis Function 147 Remote Controller Service Mode 14...

Page 312: ...nted in U S A 01 2007 AK 1645 Wallace Drive Suite 110 Carrollton TX75006 info daikinac com www daikinac com AMERICAS Specifications designs and other content appearing in this brochure are current as of January 2007 but subject to change without notice ...

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