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Daikin LRYEQ16AY1, Service Manual, Page: 195 / 335

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Daikin LRYEQ16AY1 Service Manual Download Page 195

SiBE811001EB

Troubleshooting

CONVENI-PACK

194

8.4.20 Low Pressure Sensor Abnormality

Error Code

E4

Applicable 
Models

LRYEQ16AY1

Method of Error 
Detection

Abnormality is detected by the pressure value with the low pressure sensor.

Error Decision 
Conditions

Error is generated when the low pressure is dropped under compressor operation.
Operating pressure: -0.015MPa

Supposed 
Causes

„

Abnormal drop of low pressure

„

Defective low pressure sensor

„

Defective outdoor unit PCB

„

Stop valve is not opened.

„

Refrigerant shortage

„

Moisture choke

Summary of Contents for LRYEQ16AY1

Page 1: ...Service Manual CONVENI PACK SiBE811001EB LRYEQ16AY1 E LCBKQ3AV1 E ...

Page 2: ...0 4 Description of Functions and Operation 31 4 1 Operating Mode 31 4 2 Operation Zones and Operation Mode No 32 4 3 Operation Modes and Frequency of Occurrence 32 4 4 Refrigerant Flow for Each Operation Mode 33 5 Test Operation 46 5 1 Preparations Prior to Test Operation 46 5 1 1 Charging Additional Refrigeration Oil 46 5 1 2 Additional Refrigerant Charging 48 5 2 Test Operation 51 5 2 1 Test Ope...

Page 3: ...vercurrent Lock 172 8 4 6 Swing Flap Motor MA Abnormality 173 8 4 7 Power Supply Voltage Abnormality 175 8 4 8 Electronic Expansion Valve Error Dust Clogging 176 Electronic Expansion Valve Coil Abnormality 178 8 4 9 Humidifier Unit Defect 179 8 4 10 Capacity Determination Device Abnormality 180 8 4 11 Error Transmission Between Indoor Unit PCB and Fan PCB 181 8 4 12 Indoor Unit Thermistors Abnorma...

Page 4: ... 57 Address Duplication of Central Remote Controller 246 8 4 58 Transmission Error between Indoor Unit and Central Remote Controller 247 8 4 59 System is not Set yet 249 8 4 60 System Abnormality and Refrigerant System Address Undefined 250 8 5 Troubleshooting Booster Unit 251 8 5 1 PCB Defect 251 8 5 2 Earth Leakage 252 8 5 3 High Pressure Switch Abnormality 253 8 5 4 Low Pressure Sensor Abnormal...

Page 5: ...ler Bulb 320 9 1 4 Methods of Fixing Insulating and Antisweat Covering of Feeler Bulb 323 9 1 5 Type and Principle of Electronic Expansion Valve 324 9 1 6 Mounting Position of Expansion Valve 326 9 1 7 Cautions in Construction 326 9 2 Precautions for Electronic Expansion Valve Selection 327 9 3 References 331 9 3 1 Comparison with Conventional Model 331 9 3 2 Comparison of Controls with Convention...

Page 6: ...ions under or in the vicinity of this symbol provide the specific descriptions of prohibited acts This symbol alerts you to mandatory acts or instructions Sections under or in the vicinity of this symbol provide the specific descriptions of instructions I Precautions for Construction and Repair WARNING 1 To overhaul the equipment be sure to turn OFF all power supplies 2 If a refrigerant gas belche...

Page 7: ...not the refrigerating cycle part gets hot and then repair the equipment Not doing so may result in a burn 13 Use a welder in well ventilated areas Using the welder in an enclosed room may result in lack of oxygen II Precautions for Equipment after Construction and Repair WARNING 14 To repair the equipment be sure to use parts listed in the List of Service Parts for the applicable model and proper ...

Page 8: ...shock or a fire Putting heavy things on heating or pulling the power supply cord will result in damage to it 20 Do not cause anything other than the specified refrigerant e g air to get mixed in the refrigerant system Doing so will cause the refrigerant system to have abnormally high internal pressure thus resulting in damage to the equipment or bodily injury Doing so will cause the refrigerant sy...

Page 9: ...g conditions of parts as well as the connections of soldered parts and crimp style terminals are all normal 30 After the completion of repair be sure to make measurement of insulation resistance to prove that it is not less than 1MΩ Insulation failures may result in an electric shock If any of these items is abnormal an electric shock heat generation or a fire may result 28 If the installation bas...

Page 10: ...t Q R 410A Compressor type E Intermediate INJ type Y Refrigeration Heat Pump Product category L Low temperature air conditioner R Outdoor unit E 16 Y L CB K Q 3 A V1 Anti corrosion type Power supply symbol V1 1φ 220 240V 50Hz Indicates major design category Capacity indication 3 3HP Refrigerant Q R 410A Compressor type K KHK type CB Booster unit Product category L Low temperature air conditioner K...

Page 11: ... LRYEQ16AY1 Booster unit LCBKQ3AV1 Modem Defrost signal Inside temperature AIRNET DIII net ELB for defrost heater ELB for refrigerator 200V ELB for freezer 200V Abnormal contact Monitoring center Public line Instruction for refrigeration Freezer showcase A single showcase interface makes it possible to monitor a maximum of 3 units of showcases Wiring for adaptor of a unified remote controller Inst...

Page 12: ...temperature 20 C Evaporating temperature 35 C Double pipe heat exchanger Plate type heat exchanger Intermediate pressure a 0 C 20 C 35 C b d f e g c Pressure MPa Enthalpy kcal kg Condensing temperature 40 C Compressor for freezer Performs cooling of liquid refrigerant from 35 C c to 20 C b with this evaporating heat Performs cooling of liquid refrigerant from 20 C b to 0 C a with this evaporating ...

Page 13: ... performance coefficient decreases with the decline in refrigerant capacity due to the reduction of circulated refrigerant volume to the evaporator Economizer Cycle z This performs subcooling of the liquid refrigerant going to the evaporator by expanding part of the high pressure refrigerant from the condenser in the intercooler with auxiliary electronic expansion valve z The refrigerant capacity ...

Page 14: ...it for less than 4 HP when using heating cooling operations The indoor unit for air conditioning does not operate until the capacity of the indoor unit for air conditioning of CONVENI PACK exceeds 3 HP on heating For this reason do not connect the remote controller individually to the indoor unit for less than 3 HP when operating the heating only machine Set up the indoor unit for the air conditio...

Page 15: ...l 2 5Y6 5 1 5 Dimensions H W D mm 1680 1240 765 Heat Exchanger Cross fin coil Compressor Type Hermetically sealed scroll type Piston Displacement m3 h 13 34 10 53 10 53 Number of Revolutions r p m 6300 2900 2900 Motor Output Number of Units kW 2 5 3 6 4 5 1 Starting Method Direct on line Inverter system Fan Type Propeller fan Motor Output kW 0 75 2 Airflow Rate m3 min 230 Drive Direct drive Connec...

Page 16: ...evolutions r p m 6540 Motor Output Number of Units kW 1 3 Starting Method Direct on line Inverter system Fan Type Propeller fan Airflow Rate m3 min 1 6 Drive Direct drive Connecting Pipes Liquid pipe For outdoor unit φ6 4 C1220T Brazing connection To indoor unit φ6 4 C1220T Brazing connection Gas pipe For indoor unit φ15 9 C1220T Brazing connection To outdoor unit φ9 5 C1220T Brazing connection Ma...

Page 17: ...ti corrosion PC0511 12 A9P Standard PC0511 2 Anti corrosion PC0511 12 PCB for operation input A6P Standard EB0568 A Anti corrosion EB0569 A PCB for current sensor A7P A8P Standard EB0292 Anti corrosion EB0923 PCB for earth leakage detection A10P Standard EC0726 29 Anti corrosion EC0726 32 Function components Electronic expansion valve Coil Y1E Main UKV A024 DC12V 0 26A Body UKV 32D49 0 480 pls Coi...

Page 18: ...84kΩ Outdoor unit heat exchanger outlet thermistor R6T ST8602A φ6 67 77kΩ Fuse A1P A2P F1U F2U 250V 3 15A Class T Fuse F3U F4U 250V 1 0A Class T Component Electric symbol LRYEQ16AY1 E 0 0 1 0 0 1 0 0 1 Component Electric symbol LCBKQ3AV1 E Compressor M1C 2YC63KXD D Swing compressor Fan motor Output M1F Overcurrent protection device Impedance protect PCB Control Inverter A1P Standard EC08008 Heavy ...

Page 19: ...IC EXPANSION VALVE FOR INJECTION ELECTRONIC EXPANSION VALVE FOR HEATING STOP VALVE FOR MAINTENANCE GAS INJECTION LINE STOP VALVE LIQUID FOR REFRIGERATION STOP VALVE LIQUID FOR AIR CONDITIONER THERMISTOR INTERMEDIATE COMPRESSOR STD2 COMPRESSOR STD1 COMPRESSOR INV THERMISTOR OUTDOOR AIR SERVICE PORT LOW PRESS PRESSURE SENSOR LOW PRESS PRESSURE SENSOR HIGH PRESS FOUR WAY VALVE FAN MOTOR FAN EL COMPO ...

Page 20: ...NSION VALVE FOR LIQUID INJECTION PRESSURE CONTROL VALVE ELECTRONIC EXPANSION VALVE FOR SUB COOLING PRESSURE SENSOR LOW COMPRESSOR INV HIGH PRESSURE SWITCH OIL SEPARATOR SERVICE PORT STOP VALVE LIQUID INLET SIDE STOP VALVE DISCHARGE GAS SIDE EL COMPO BOX DOUBLE TUBE HEAT EXCH FAN FOR INVERTER COOLING ...

Page 21: ...ANGE FOR PULL DOWN OPERATION TO BE MORE THAN 3 C HOUR THAT THE TEMPERATURE OF INDOOR UNIT DROPS DO NOT OPEN THE DOOR AND DO NOT ENTER THE GOODS IN PULL DOWN OPERATION AS POSSIBLE REFRIGERATION Outdoor air temperature CDB Outdoor air temperature CDB Outdoor air temperature CWB Air conditioner cooling Indoor temperature CWB Evaporating temperature C Indoor temperature CDB Refrigeration Air condition...

Page 22: ... SHOWS POSSIBLE RANGE OF SHORT TIME OPERATION DO NOT SELECT THE MODEL IN THE RANGE FOR PULL DOWN OPERATION TO BE MORE THAN 3 C HOUR THAT THE TEMPERATURE OF INDOOR UNIT DROPS DO NOT OPEN THE DOOR AND DO NOT ENTER THE GOODS IN PULL DOWN OPERATION AS MUCH AS Outdoor air temperature CDB Evaporating temperature C Range for continuous operation 4D067032 Range for pull down operation ...

Page 23: ...E TURNING ON POWER SUPPLY REFER TO TECHNICAL GUIDE FOR THE OPERATION TIMING DIAGRAM 6 HOW TO USE BS1 5 AND DS1 2 SWITCH REFER TO SERVICE PRECAUTION LABEL ON EL COMPO BOX COVER 7 WHEN OPERATING DON T SHORTCIRCUIT THE PROTECTION DEVICE S1PH S3PH S1PL 8 BE NOTED THAT THE CAPACITY OF CONTACT IS AC220 240V 110 120VA TOTAL OF CAUTION OUTPUT WARNING OUTPUT 9 BE NOTED THAT THE CAPACITY OF CONTACT IS AC220...

Page 24: ...MANUAL 4 BE NOTED THAT THE CAPACITY OF CONTACT IS AC220 240V 100VA 5 COLORS BLK BLACK RED RED BLU BLUE WHT WHITE PNK PINK BRN BROWN ORG ORANGE GRY GRAY GRN GREEN 6 WHEN OPERATING DON T SHORTCIRCUIT THE PROTECTION DEVICE S1PH 7 AT THE TIME OF FACTORY SHIPMENT SETTING OF OFF WHEN OPERATING SETTING OF ON OR REMOTE THE POINT OF CONTACT OF THE INPUT MUST USE THE ONE FOR A SLIGHT CURRNET FOR THE REMOTE ...

Page 25: ...20T STOP VALVE WITH SERVICE PORT φ7 9 FLARE CONNECTION STOP VALVE WITH SERVICE PORT φ7 9 FLARE CONNECTION STOP VALVE WITH SERVICE PORT φ7 9 FLARE CONNECTION STOP VALVE WITH SERVICE PORT φ7 9 FLARE CONNECTION ELECTRONIC EXPANSION VALVE DOUBLE TUBE HEAT EXCH PLATE TYPE HEAT EXCHANGER ELECTRONIC EXPANSION VALVE SOLENOID VALVE FUSIBLE PLUG SOLENOID VALVE PRESSURE REGULATING VALVE CAPILLARY TUBE CAPILL...

Page 26: ...TION TO GAS PIPE φ15 9 C1220T REFRIGERATION TO LIQUID PIPE φ6 4 C1220T OUTDOOR UNIT TO LIQUID PIPE φ6 4 C1220T STOP VALVE WITH SERVICE PORT φ7 9 FLARE CONNECTION STOP VALVE WITH SERVICE PORT φ7 9 FLARE CONNECTION CAPILLARY TUBE PRESSURE SENSOR LOW PRESS LCBKQ3AV1 BOOSTER UNIT ELECTRONIC EXPANSION VALVE ELECTRONIC EXPANSION VALVE HIGH PRESSURE SWITCH PRESSURE REGULATING VALVE DOUBLE TUBE HEAT EXCH ...

Page 27: ...e at the needle part of the electronic expansion valve resulting in clogging this drier is provided 12 Electronic expansion valve Main Y1E Used to keep the suction superheated degree SH constant when the outdoor unit heat exchanger is used as an evaporator 13 Electronic expansion valve Subcooling Y2E Controls injection refrigerant for freezing subcooling 14 Electronic expansion valve Oil return Y3...

Page 28: ...e STD compressor 1 M2C and control this compressor M2C for protection 38 Thermistor discharge pipe R33T Used to detect the discharge pipe temperature of the STD compressor 2 M3C and control this compressor M3C for protection 39 Thermistor plate type heat exchanger outlet R4T Used to detect the liquid refrigerant temperature and control subcooling 40 Thermistor outdoor unit heat exchanger outlet R6...

Page 29: ...CE PORT φ7 9 FLARE CONNECTION STOP VALVE WITH SERVICE PORT φ7 9 FLARE CONNECTION STOP VALVE WITH SERVICE PORT φ7 9 FLARE CONNECTION ELECTRONIC EXPANSION VALVE DOUBLE TUBE HEAT EXCH PLATE TYPE HEAT EXCHANGER ELECTRONIC EXPANSION VALVE SOLENOID VALVE FUSIBLE PLUG SOLENOID VALVE PRESSURE REGULATING VALVE CAPILLARY TUBE CAPILLARY TUBE CAPILLARY TUBE CHECK VALVE CHECK VALVE CHECK VALVE OIL SEPARATOR OI...

Page 30: ...Releases liquid refrigerant to prevent liquid sealing 6 Electronic expansion valve Liquid injection Y1E Used to keep the discharge pipe temperature at freezer side constant 7 Electronic expansion valve Subcooling Y2E Controls injection refrigerant for freezing storage subcooling 8 Pressure sensor Low pressure S1NPL Used to detect low pressure and control the compressor of the booster unit 9 High p...

Page 31: ...E811113 Series Condensing unit for refrigeration system Remark Model Option name LRYEQ16AY1 LRYEQ16AY1E Digital pressure gauge kit BHGP26A1 BHGP26A1E Snowbreak hood Kit Inlet Outlet KPS26C504 KPS26C504E Note 1 Air outlet KPS26C504T KPS26C504TE Note 1 Left side air inlet KPS26C504L KPS26C504LE Note 1 Right side air inlet KPS26C504R KPS26C504RE Note 1 Back side air inlet KPS26C504B KPS26C504BE Note ...

Page 32: ...Cooling Refrigeration Cooling Refrigeration Heating only Heating Refrigeration Heating Refrigeration Heating Refrigeration 100 Heat recovery Heating surplus INV Compressor 3 Refrigeration Refrigeration Refrigeration Refrigeration Refrigeration Refrigeration Refrigeration Refrigeration Refrigeration STD Compressor 1 4 Air conditioning Loads fluctuate Air conditioning Air conditioning Refrigeration ...

Page 33: ...n very rare occasion example if thermostat ON is requested while in standby mode and while in back up operation Air conditioning load Refrigeration load When an air conditioner is in cooling operation When an air conditioner is in heating operation Refrigeration load high Refrigeration load zero Air conditioning load zero Air conditioning load high Air conditioning load Refrigeration load Refriger...

Page 34: ...sure sensor Sight glass Electronic expansion valve Solenoid valve Four way valve Pressure regulating valve Drier Field supply Capillary tube Check valve Service port Stop valve Y2E Y6S HPS Y1R Y2R Y3R LPS1 Heat Pump indoor unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply HPS HPS RC INV HPS Four way valve Y1R OFF Y2R OFF Y3R ON STD1 STD2 INV ...

Page 35: ...ion 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS HPS HPS Four way valve Y1R OFF Y2R OFF Y3R OFF STD1 STD2 INV HPS Y2E Y6S Y1R Y2R Y3R LPS1 STD1 STD2 INV Heat Pump indoor unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS HPS HPS Four way valve Y1R OFF Y2R OFF Y3R ON HPS ...

Page 36: ...eat Pump indoor unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS HPS HPS Four way valve Y1R OFF Y2R OFF Y3R ON HPS Y2E Y6S Y1R Y2R Y3R LPS1 STD1 STD2 INV Heat Pump indoor unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS HPS HPS Four way valve Y1R OFF Y2R OFF Y3R OFF HPS ...

Page 37: ...OFF Y3R OFF Y2E Y6S Y1R Y2R Y3R LPS1 STD1 STD2 INV Heat Pump indoor unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS HPS HPS HPS Four way valve Y1R OFF Y2R OFF Y3R ON Y2E Y6S Y1R Y2R Y3R LPS1 STD1 STD2 INV Heat Pump indoor unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS ...

Page 38: ... Pump indoor unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS HPS HPS Four way valve Y1R OFF Y2R OFF Y3R OFF HPS Y2E Y6S Y1R Y2R Y3R LPS1 STD1 STD2 INV Heat Pump indoor unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS HPS HPS Four way valve Y1R OFF Y2R OFF Y3R ON HPS ...

Page 39: ... indoor unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS HPS HPS Four way valve Y1R OFF Y2R OFF Y3R OFF HPS Y2E Y6S Y1R Y2R Y3R LPS1 STD1 STD2 INV Heat Pump indoor unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS HPS HPS Four way valve Y1R OFF Y2R OFF Y3R OFF HPS ...

Page 40: ... unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS HPS HPS Four way valve Y1R ON Y2R OFF Y3R ON HPS Y2E Y6S Y1R Y2R Y3R LPS1 STD1 STD2 INV Heat Pump indoor unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS HPS HPS Four way valve Y1R ON Y2R OFF Y3R OFF HPS ...

Page 41: ...mp indoor unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS HPS HPS Four way valve Y1R ON Y2R OFF Y3R ON HPS Y2E Y6S Y1R Y2R Y3R LPS1 STD1 STD2 INV Heat Pump indoor unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS HPS HPS Four way valve Y1R ON Y2R OFF Y3R ON HPS ...

Page 42: ...Heat Pump indoor unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS HPS HPS Four way valve Y1R ON Y2R OFF Y3R OFF HPS Y2E Y6S Y1R Y2R Y3R LPS1 STD1 STD2 INV Heat Pump indoor unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS HPS HPS Four way valve Y1R ON Y2R OFF Y3R OFF HPS ...

Page 43: ... Heat Pump indoor unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS HPS HPS Four way valve Y1R ON Y2R OFF Y3R ON HPS Y2E Y6S Y1R Y2R Y3R LPS1 STD1 STD2 INV Heat Pump indoor unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS HPS HPS Four way valve Y1R ON Y2R OFF Y3R OFF HPS ...

Page 44: ...door unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS HPS HPS Four way valve Y1R ON Y2R OFF Y3R OFF HPS Y2E Y6S Y1R Y2R Y3R LPS1 STD1 STD2 INV Heat Pump indoor unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS HPS HPS Four way valve Y1R ON Y2R OFF Y3R OFF HPS ...

Page 45: ...oor unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS HPS HPS Four way valve Y1R ON Y2R OFF Y3R OFF HPS Y2E Y6S Y1R Y2R Y3R LPS1 STD1 STD2 INV Heat Pump indoor unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS HPS HPS Four way valve Y1R ON Y2R ON Y3R OFF HPS ...

Page 46: ...r unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS HPS HPS Four way valve Y1R ON Y2R ON Y3R OFF HPS Y2E Y6S Y1R Y2R Y3R LPS1 STD1 STD2 INV Heat Pump indoor unit Refrigeration 5 C Refrigeration 5 C Freezer 30 C Y3E Y4E Y5E Y1E Y2E Y1S Y1E Field supply RC INV HPS HPS HPS Four way valve Y1R ON Y2R ON Y3R OFF HPS ...

Page 47: ... to expose the refrigeration oil to air Any leftover oil should be disposed of appropriately as waste Piping and other fittings must be R 410A specific Procedure for charging oil No of connected units When 3 booster units are connected Piping length Less than 50 m 1 0 liter 1 can 50 m or more 1 5 liters 2 cans are required Refrigeration oil φ6 4 piping Flare nut Service port connection adaptor Out...

Page 48: ...rged 2 Evacuate from the liquid stop valve on the refrigeration side of the outdoor unit 3 Charge oil from the liquid stop valve of the booster unit In case of the outdoor unit is placed below 1 Confirm the liquid piping capacity is greater than the volume of refrigeration oil to be charged 2 Evacuate from the liquid stop valve of the booster unit 3 Charge oil from the refrigeration side liquid st...

Page 49: ... 0 kg 3 5 kg Over 30 kW less than 35 kW 8 2 kg 4 1 kg Over 35 kW less than 40 kW 9 7 kg 4 9 kg Over 40 kW 11 0 kg 5 5 kg P A B C A 0 18 0 12 0 059 0 022 B 3 5 kg according to LRYEQ16AY1 C Additional charging amount Liquid piping portion Outdoor unit portion Connection unit portion Liquid piping portion Outdoor unit portion Connection unit portion Total length of φ15 9 liquid pipe Refrigeration sho...

Page 50: ...service manual of R410A conveni pack SiBE811001_A P 48 C4 becomes the following 3 Other limitation conditions There is no change to other limitation conditions The minimum air conditioning total capacity 8HP The maximum air conditioning total capacity 12HP The maximum indoor unit connection number 6 or less Prohibition of individual driving and control with less than 4HP Install the indoor unit fo...

Page 51: ...less than or equal to P C 0 1 A Volume of onsite additional refrigerant amount calculated according to the piping and units Once the designated refrigerant amount has been charged turn the operation switch OFF on the outdoor unit The outdoor unit fan may continue to spin for a while after running has stopped Fully open the gas and liquid stop valves immediately the pipes can be damaged by a build ...

Page 52: ...n showcase refrigeration unit cooler freezer showcase booster unit Set the operation switch to ON via the inspection door of the outdoor unit booster unit Run by pressing the ON OFF button on the indoor unit air conditioner remote controller Confirm the following details for each unit Air conditioner Remote controller Outdoor unit Liquid open Gas open Booster unit Freezer showcase Refrigeration sh...

Page 53: ... additional 5 minutes turn the power of the indoor unit for air conditioner OFF This is because of the residual operation of the drain pump When conducting Step there are times when the EV of the indoor unit for air conditioner is open This is to prevent an accumulation of refrigerant in the indoor unit for air conditioner when the unit is OFF for long periods of time and therefore preventing pote...

Page 54: ...ce of 50 mm or more from each other Good No good Ground wire Visual check To be connected B U outdoor unit Good No good Refrigerant piping Mounting of sight glass Visual check To be mounted to liquid piping Good No good To be mounted to riser or horizontal piping Good No good Mounting of drier filter Visual check To be mounted to liquid piping Good No good Outdoor unit piping Visual check Must be ...

Page 55: ...urrent A Current leakage mA Inverter compatible Booster unit Overcurrent A Current leakage mA Inverter compatible Power supply wiring connection terminals connectors and the like Check screws for power supply terminals for tightening and insertion visually No screws shall come off or loosen Outdoor unit Good No good Booster unit Good No good Operating data Power supply voltage Measure voltages bet...

Page 56: ...e compressor starts up measure this pressure in stable conditions using a PC or pressure gauge On air conditioning side Cooling 0 7 1 0MPa Outdoor unit MPa On air conditioning side Heating 0 2 0 7MPa Outdoor unit Refrigeration MPa On refrigeration side 0 2 0 9MPa Normal Operation Booster unit MPa 0 05 0 3MPa Discharge pipe temperature Heat source high pressure 2 6 3 2MPa B U high pressure 0 05 0 3...

Page 57: ...eplenishment Refer to CHECKS AFTER WORK COMPLETION and the label of instructions on refrigerant replenishment on the cover surface of the control box Important information regarding the refrigerant used This product contains fluorinated greenhouse gases covered by the Kyoto Protocol Do not vent gases into the atmosphere Refrigerant type R 410A GWP 1 value 1975 1 GWP global warming potential Values...

Page 58: ...gerant oil and the generation of scale is considered If the indoor unit or outdoor unit is disconnected from the piping for a long time The intrusion of water and dust into the piping is considered The copper pipe is corroded The refrigerant of the CONVENI PACK previously used was other than R 410A e g R 404A R 507 or R 407C The contamination of the refrigerant with heterogeneity is considered If ...

Page 59: ... can exceed the size of any upstream piping φ9 5 0 8 O type φ12 7 0 8 O type φ12 7 0 8 O type φ6 4 0 8 O type φ9 5 0 8 O type φ15 9 1 0 1 2H type φ19 1 1 0 1 2H type φ22 2 1 0 1 2H type φ25 4 1 0 1 2H type φ25 4 1 0 1 2H type φ28 6 1 2 1 2H type Total capacity of indoor units after branching Less than 6 0 kW 6 0 kW or over and less than 9 9 kW 9 9 kW or over and less than 14 5 kW 14 5 kW or over a...

Page 60: ...o the indoor unit 5 3 4 Operation Method of Stop Valves Follow the instructions below when operating each stop valve Caution Do not open the stop valve until the steps specified in Checking of Device and Installation Conditions is completed Do not leave the stop valve opened without turning the power ON otherwise refrigerant may be condensed in the compressor and the insulation of the main power s...

Page 61: ...e nut use to the sealing part Be sure to tighten the valve cover securely after operating the valve Refer to Operation Method of Stop Valves for the tightening torque of the valve Handling Precautions for Service Port Work on the service port with a charge hose provided with a pushing rod At the time of mounting the cap apply a screw lock agent to the screw thread Do not apply a screw lock agent f...

Page 62: ... will prevent the stay of refrigerant oil in the indoor unit not in operation Use a T joint for the gas refrigerant branch and connect from the top of the main piping Make sure that the horizontal portion of the gas piping slants downward to the outdoor unit see the illustration above If the outdoor unit is located above make a trap on the gas pipe at 5 m intervals from outdoor unit This will ensu...

Page 63: ...rcuit breaker When using residual current operated circuit breakers be sure to use a high speed type 1 second or less 200mA rated residual operating current Use copper conductors only Use insulated wire for the power cord Select the power supply cable type and size in accordance with relevant local and national regulations Specifications for local wiring are in compliance with IEC60245 Use wire ty...

Page 64: ...tput wiring to the X2M terminal block and clamp as indicated by the following diagram X2M wire specifications Remote operating switch wiring connections When installing a remote operating switch clamp as indicated by the following diagram X3M wire specifications Caution For Remote switch use non voltage contact for microcurrent not more than 1mA 12VDC If the remote operating switch will be used to...

Page 65: ...ir leaks Vacuum drying Operate the vacuum pump for more than 3 hours from the service port of both the liquid pipe and the gas pipe 2 to evacuate to 100 7 kPa or less After that 1 pressurize the outdoor unit with nitrogen gas to 0 2 MPa or more and after leaving the outdoor unit for 10 minutes 2 operate the vacuum pump for more than 1 hour to evacuate to 100 7 kPa or less Repeat the steps 1 and 2 ...

Page 66: ...eakage Consult the following chart as a general guide when selecting the insulation thickness Liquid pipe arrival minimum temperature 20 C Air conditioning side 5 C Refrigeration side Gas pipe arrival minimum temperature 0 C Air conditioning side 20 C Refrigeration side Reinforce the insulation material for the refrigerant piping according to the environment of thermal installation Otherwise the s...

Page 67: ...ower Supply Wiring 2 Has the insulation of the main power circuit deteriorated Measure the insulation and check the insulation is above regular value in accordance with relevant local and national regulations For those doing pipe work 1 Make sure piping size is correct See Selection of Piping Material 2 Make sure insulation work is done See Thermal Insulation Work 3 Make sure there is no defective...

Page 68: ...h any live parts since this operation must be performed with the power ON Check the LED indicators on the PCB A1P of the outdoor unit through the inspection hole on the right hand side of the control box lid after the outdoor unit is turned ON see the illustration The compressor will not operate for approximately 10 minutes after the outdoor unit and air conditioning indoor unit are turned ON H2P ...

Page 69: ... be filled take the following steps to operate the system and continue refrigerant replenishment a Open the gas stop valve all the way and adjust the opening of the liquid stop valve 1 b Warning Electric Shock Warning Turn ON the outdoor unit c Warning Electric Shock Warning Turn ON the RUN switch of the outdoor unit and replenish refrigerant while the outdoor unit is in operation d Turn OFF the R...

Page 70: ...est Operation For test operation operators Do not operate the outdoor unit alone on a trial basis When you connect a booster unit refer to the installation manual attached to the booster unit before a test operation Test operation procedure Use the following procedure to perform a test operation after installation work is complete for the entire system 1 Fully open the stop valves on the gas and l...

Page 71: ...sulating rod See the right figure Refer to the Service Manual for other error codes Caution Do not disconnect the power supply for 1 minute after setting the operating switch to ON Electric leak detection is performed for several seconds after the operating switch is set to ON and each compressor starts operating so disconnecting the power supply during that time will result in a false detection R...

Page 72: ...or unit Checking of water leaks Check by operating the indoor unit in cooling mode for a period of 20 minutes or pouring water on the drain pan No water leaks Indoor unit A Good No good Indoor unit B Good No good Swing Visual check of the operation using the indoor unit remote controller To operate normally Indoor unit A Good No good Indoor unit B Good No good Error history Visual check of the ind...

Page 73: ...C C Serial No Discharge air temperature C C Suction air temperature C C Air velocity at air curtain section 0 5 m s or less m s Type of expansion valve Mechanical expansion valve Checking of expansion valve For R 410A use To be of external equalizer or internal equalizer type 1 Do not put too much in 2 SH must be 5 C or more There must be no significant uncontrolled fluctuation Type of solenoid va...

Page 74: ...much in 2 SH must be 5 C or more There must be no significant uncontrolled fluctuation Type of solenoid valve Checking of solenoid valve For R 410A use Operating current Reference value A Reference value Freezer showcase Manufacturer Temperature setting C C Audible alarm over abnormally high temperature C C Type Audible alarm over abnormally low temperature C C Serial No Antisweat controller Check...

Page 75: ...iser or horizontal piping Good No good Mounting of drier filter Visual check To be mounted to liquid piping Good No good B U piping Visual check The piping lengths both on the discharge piping and suction piping are to be within 30 m Good No good The difference of elevation for the installation of B Us is to be 10 m or less from the floor level on which the S C is installed Good No good Internal r...

Page 76: ...sor U A V A W A Inverter Hz Standard compressor OC 13 20A Standard compressor U A V A W A Standard compressor U A V A W A Booster unit inverter electronic thermal relay 0 1 6A Booster unit compressor L A N A Inverter Hz High pressure discharge pressure Cooling Outdoor air temperature 25 C 35 C Heating Indoor suction air temperature 25 C 30 C After a lapse of 20 minutes or more since the compressor...

Page 77: ...r STD current sensor STD1 STD2 Protection device Outdoor air thermistor Startup control for air conditioning Startup control for refrigeration Refrigerant and oil recovery Discharge pipe temperature control Outdoor subcooling control Oil return control and control of Y3E to Y5E Receiver liquid pressure control Overheat protection control High pressure protection control Low pressure protection con...

Page 78: ...1PH S2PH S3PH HPS1 HPS2 HPS3 Low Pressure Switch S1PL LPS1 Pressure Sensor High Pressure S1NPH1 HP HP Pressure Sensor Intermediate Pressure S1NPH2 MP MP Pressure Sensor Low Pressure S1NPL1 LP1 LP1 Pressure Sensor Low Pressure S1NPL2 LP2 LP2 Thermistor Outdoor Air R1T Ta Ta Thermistor Suction_Air conditioning R21T Ti1 Ti1 Thermistor Suction_Refrigeration R22T Ti2 Ti2 Thermistor Discharge_INV R31T T...

Page 79: ... 9 104 52 10 110 55 11 116 58 12 124 62 13 132 66 14 144 72 15 158 79 16 165 82 5 17 176 88 18 188 94 19 202 101 20 210 105 Fan tap 0 1 2 3 4 5 6 7 8 9 10 11 Revolution of outdoor unit fan standard setting rpm 0 300 460 690 460 570 720 800 930 1050 1091 1186 0 0 0 0 395 540 690 770 900 1020 1061 1156 Fan tap 0 1 2 3 4 5 6 7 8 9 10 11 Revolution of outdoor unit fan high static pressure setting rpm ...

Page 80: ...ure detected with low pressure sensor S2NPL Operation SW OFF Remote controller OFF Main DIP SW2 3 Rest refrigeration equipment after forced stop ON Cleaning request from indoor unit exists Cleaning approval from outdoor unit exists All air conditioning indoor unit requires thermostat OFF Total capacity of connectable indoor units for air conditioning 4HP 3HP in heating Cooling LP2 0 343MPa continu...

Page 81: ...rating mode prohibited OR OR OR OR Operation SW ON Compressor re starting standby terminated Main DIP SW2 2 Refrigerating forced OFF OFF Main DIP SW2 2 Refrigerating forced OFF ON Continuous for consecutive 3 hours have passed LP1 Lpm1 0 147MPa LP1 Lpm1 f Tsd Previous time period of thermostat ON for refrigeration is more than 5 min LP1 Lpm1 f Tsd Standby time period for refrigeration is over 3 13...

Page 82: ...setting 10 C 0 47MPa 20 C 0 29MPa 15 C 0 37MPa 5 C 0 56MPa 1 2 3 4 ON OFF 1 2 3 4 ON OFF 1 2 3 4 ON OFF 1 2 3 4 ON OFF DS1 Tsd Lpm1 0 C 0 69MPa 5 C 0 82MPa 10 C 0 98MPa 1 4 3 2 ON OFF 1 2 4 3 ON OFF 1 2 3 4 ON OFF Lpm1 Pressure equivalent evaporative pressure set with DIP switch Evaporative temperature set with DIP switch Tsd LP1 Pressure detected by low pressure sensor S1NPL1 52Hz 15sec 56Hz 15se...

Page 83: ...5 6 7 40 41 42 LP1 1 666MPa Operation SW ON OR Operation clearance OFF to Booster unit Operation clearance ON to Booster unit OR LP2 MP 0 098MPa LP2 0 98MPa continues for consecutive 5 minutes or more HP 2 842MPa HP LP2 0 294MPa continues for consecutive 5 minutes or more Air conditioner stopping time exceeds 180 minutes At HP LP2 0 294MPa 60 minutes Within 7 minutes of the power ON Within 7 minut...

Page 84: ...ration mode 74 75 80 Redundant refrigerant recovery 3 by EV Outdoor unit fan Minimum Outdoor Y1E Closing SV1 OFF Indoor EV Fully open SV0 ON OR Tc Condensing temperature calculated from high pressure R2T Indoor liquid pipe thermistor R3T Indoor gas pipe thermistor Opening degree of EV of all indoor units 0 pls Tc Max R3T 2 C continues for consecutive 20 minutes or more HP 2 94MPa Tc Min R2T 5 C co...

Page 85: ...very 4 Opening degree of outdoor Y1E 1 3 1 8 times the current opening degree OR Operation mode Outdoor evaporative mode More than 60 minutes after the accumulated AC thermostat ON Outdoor Y1E 400 pls continues for consecutive 10 seconds or more SH2 3 C continues for consecutive 1 minute or more Operation mode Except outdoor evaporative mode Oil recovery 4 is more than 3 minutes 2 94MPa 2 989MPa H...

Page 86: ... unit while thermostat ON 7HP LP2 0 3626MPa Capacity of the AC indoor unit while thermostat ON 7 HP Operation mode 5 17 LP2 D MPa continues for consecutive 8 minutes or more Operation mode 5 17 OR INV_STEP 20 Lpm 0 0147MPa Freezing capacity UP 0 0147MPa Lpm 0 0147MPa Lpm LP1 Lpm Ta Outdoor air temperature f Ta Equivalent saturation pressure by outdoor air temperature Lpm_x f Tst Saturation pressur...

Page 87: ...n high and low pressure is smaller than 0 294MPa for oil feeding When INV _STEP 12 Speed increasing with 3 steps every 30 seconds Start up STD1 compressor on the refrigeration when INV _STEP 12 and mode is 30 or 65 Operation mode 41 42 43 46 64 65 70 Increases the number of compressor units in outdoor evaporator mode Reduces the number of compressor units at outdoor evaporator mode Maintains the n...

Page 88: ...cooling control Fan control in cooling Outdoor unit fan UP During normal operation During high pressure increasing is drooping 1 HP B MPa When the above condition is released During normal operation During high pressure increasing is drooping 2 3 283MPa 3 332MPa 3 185MPa 3 234MPa Heating Cooling A HP_ Sudden increasing B HP_Droop 1 Outdoor unit fan UP Maintain outdoor unit fan Outdoor unit fan DOW...

Page 89: ... 744MPa continues for consecutive 5 minutes or more STD compressor stops operation HP 2 548MPa When Min Tset Tr 2 5 C or Max Tset Tr 6 9 C Ta B C B 20 C Mode 64 25 C Mode 65 70 Shift the mode to increase heating capacity Guard timer of heating capacity increasing 3 30 minutes 2 548MPa HP HPn Setting of HPn by set 3 12 MPa Maintain the status HPn MPa HP Min 3 087MPa HPn 0 245MPa MPa Forcible H inst...

Page 90: ...t Tc1 Target Tc2 Target Tc1 Determined by setting temperature of remote controller Target Tc1 Max Tset 20 C Tc1 correction Changeable by service mode 2 29 Target Tc2 Outdoor air temperature and Tc2 correction Changeable by service mode 2 32 OFF Factory setting SET 1 SET 2 SET 3 SET 4 SET 5 Tc1 correction 0 C 2 C 1 C 1 C 2 C 3 C Tc2 correction Formula of Tc2 Formula 1 Formula 2 Formula 3 Formula 4 ...

Page 91: ...ition formation of Td sudden increasing When Td 115 C continues for more than 1 minute Make the Y2E opening degree up down OR Td 60 C continues for consecutive 10 seconds or more Min TdSH TpSH 20 C continues for consecutive 20 seconds or more 5 minutes have passed after startup Intermediate Y2E wet avoiding control Intermediate Y2E overheat avoiding control Intermediate Y2E MP intermediate SH cont...

Page 92: ...E 480pls SV1 OFF Partial Heat Recovery control Operation mode 74 75 80 HP 2 94MPa Y1E 480pls SV1 ON Operation mode 74 75 80 HP 2 94MPa and Y1E_PLS 20pls Y1E 350pls SV1 OFF Operation mode 74 75 80 HP 2 94MPa and Y1E_PLS 20pls Target SC 5 C Changeable by service mode 2 13 SV1 ON or OFF Target SC Set 2 13 OFF Factory setting Set 1 Set 2 5 C 10 C 8 C Outdoor SC f HP Tce f HP High pressure equivalent s...

Page 93: ... Both the refrigeration and air conditioning operate Judgement is made during cooling operation when the refrigeration and air conditioning are operating and high pressure is high Overload operation is judged as being when HP 2 744MPa and is released when HP 2 548MPa Overheat avoiding conditions Td Target Td Control at target intermediate Td 100 C Y3E Y4E Y5E are open Opening degree of Y3E Y4E Y5E...

Page 94: ... unit is in heating mode except for partial Heat Recovery mode HP 2 84 MPa All indoor units are instructed to set fan to H When continuous heating operation is 4 minutes or less unit is in partial Heat Recovery mode HP 1 96 MPa or in defrosting operation All indoor units that have the thermostat ON are instructed to set fan to L released when HP 2 45 MPa When thermostat has switched ON from partia...

Page 95: ...ng degree of indoor EV added Opening degree of indoor EV 0pls instruction above conditions are met Controls LP2 at a constant value when 5 C target SH 10 C OR LP2 0 725MPa Correction Te Changeable by service mode 2 34 Condition A HP 2 646MPa Operation mode 8 to 24 LP2 0 725MPa Correction Te Changeable by service mode 2 34 Condition B Operation mode Heating mode Redundant refrigerant recovery 3 Ope...

Page 96: ...power switch or operation switch and restart it again 15 Low pressure protection control If the pressure drops below 0 00MPa the system will cease operation After 2 to 10 minutes in standby the system will resume operation Also for the refrigeration closing of the suction stop valve will be detected up to 3 hours of cumulative operation of the compressor after start up The air conditioner will abn...

Page 97: ...or air conditioning units Display U9 Backup Refrigeration is capable of continuous operation However if the outdoor unit is turned OFF the system will shut down because it cannot escape from the initialize state Outdoor multi transmission error between outdoor unit main PCB and sub PCB Display U7 System stoppage Indoor outdoor transmission error between booster unit and outdoor air conditioning un...

Page 98: ... Increase in high pressure Dropping electric current Air conditioning low pressure drop Air conditioning ability increase request Air conditioning ability decrease request Increase in high pressure Dropping electric current Air conditioning low pressure drop Air conditioning ability decrease request Increase in high pressure Dropping electric current Air conditioning low pressure drop Refrigeratio...

Page 99: ...crease request Air conditioning ability increase request Air conditioning ability decrease request Increase in high pressure Decline in air conditioning low pressure Dropping electric current Air conditioning ON Recovery of excess refrigerant Air conditioning ability decrease request During H P prohibition Refrigeration ability increase request Oil recovery Refrigeration ability decrease request D...

Page 100: ... conditioning Mode 43 INV refrigeration STD1 air conditioning Mode 46 INV refrigeration STD2 air conditioning Mode 52 INV refrigeration STD1 STD2 air conditioning Mode 64 INV STD1 refrigeration Mode 29 INV STD1 refrigeration Mode 30 INV refrigeration Mode 6 STD2 air conditioning Mode 7 STD1 air conditioning Mode 8 INV refrigeration STD1 air conditioning Mode 0 Mode 0 Mode 0 Mode 29 INV STD1 refrig...

Page 101: ...thermistor INV primary and secondary current INV fin temperature thermistor Protection device Discharge pipe temperature control High pressure protection control Low pressure protection control Overheat protection control Earth leakage detection control Electronic expansion valve Solenoid valve for freezing Startup control Capacity control Oil recovery control Fan control Subcooling control Droop ...

Page 102: ...ressor Step Table Step DC compressor frequency No of revolution Hz rps 0 0 0 1 57 19 2 63 21 3 69 23 4 78 26 5 87 29 6 97 5 32 5 7 109 5 36 5 8 124 5 41 5 9 139 5 46 5 10 156 52 11 168 56 12 183 61 13 192 64 14 204 68 15 216 72 16 228 76 17 237 79 18 246 82 19 255 85 20 265 5 88 5 21 282 94 22 297 99 ...

Page 103: ...mplete Y2E Freezing operation output 15sec 109 5Hz Y1E BU_LP Low pressure of booster unit detected with S1NPL Before reception before thermostat is ON OR OR OR Booster unit Operation switch ON Compressor re starting standby terminated Freezing thermostat ON signal is ON X2M T1 T2 are ON Communication between outdoor unit and booster unit is normal When there is a communication error between outdoo...

Page 104: ...rection setting 2 by the BS button Refer to the Field setting for details Tst_BU Tsd_BU Tsp1_BU Tsp2_BU Tsd_BU Evaporative temperature set by DIP switch Lpmt_BU Pressure conversion of target evaporating temperature A3P side Tsd_BU Lpmd_BU Factory setting 35 C 0 118MPa 45 C 0 029MPa 40 C 0 069MPa 30 C 0 167MPa 1 2 3 4 ON OFF 1 2 3 4 ON OFF 1 2 3 4 ON OFF 1 2 3 4 ON OFF A3P side Tsd_BU Lpmd_BU 25 C ...

Page 105: ...ording to thermostat ON OFF operation Lpm BU_LP Lpmt_BU Freezing capacity DOWN Maintenance of freezing capacity Freezing capacity UP Reduce the speed of the compressor with 1 step for every 30 seconds INV_STEP 1 Lpm 0 0147MPa 0 0147MPa Lpm 0 0147MPa 0 0147MPa Lpm 0 0147MPa BU_LP 0 0294MPa INV_STEP Min_STEP Increase the speed of the compressor with 1 step for every 30 seconds INV_STEP 22 DIP SW A3P...

Page 106: ...P 0 0588MPa 30 sec have passed R2 signal ON BU_LP 0 0784MPa BU_LP 0MPa 60 sec have passed Oil recovery terminated BU_Td 100 C BU_Td rises quickly BU_Td 50 C Y1E_pls 43pls OR Discharge pipe temperature control Droop control via Td rise Y1E control by Td When the conditions on the right are met Compressor operation is stepped down Opening degree of Y1E is added OR BU_Td 105 C continues for 45 consec...

Page 107: ...mal stop Discharge pipe temperature 125 C 10 Droop control 11 Earth leakage detection control Detection during initial power up The system will check for earth leakage while the compressor is running for the first 10 seconds after power up A compressor will stop abnormally if the power breaker is turned OFF or the earth leakage detector PCB is activated during the 10 second period describe above W...

Page 108: ...cting air conditioning equipment Factory setting Refrigeration forced OFF is released Air conditioning forced OFF setting This setting is used only when operating the refrigeration side of this unit Set this DIP switch to OFF when reconnecting refrigeration equipment Caution When operating in air conditioning forced run mode DIP SW2 on the main PCB must be ON Factory setting Air conditioning force...

Page 109: ...in a range of 4K to 4K in 1K increments This can also be used to adjust for suction pressure loss based on the frequency For setting procedures refer to the pages after this page Do not set the target evaporating temperature to 20 C or less Doing so may damage the compressor or cause cooling failures 6 Setting transmission less Use this switch when there are no units for D III indoor outdoor F1 F2...

Page 110: ... on the refrigeration equipment will stop for about 3 minutes In heating mode after operation is stopped from the remote controller for 20 consecutive minutes four way valve A switches The remote controller display continues to indicate heating mode Note this mode only operates in the residual refrigerant recovery 3 cycle and when service mode 2 20 is set to use set 2 or set 3 Sub DS1 Sub DS2 ON O...

Page 111: ...oping control is working due to a high discharge pipe temperature or other reason the compressor does not step up even when the above conditions are met 4 When there is a significant load change during heating operation the frequency may be frequently increased and decreased and that may cause unstable heating capability Setting method The numbers in the No column represent the number of times to ...

Page 112: ...ODE 8 30 74 75 HP 2 74 MPa MODE 43 59 64 65 Target Lpm 0 015 MPa Low pressure Range which can change the amount changed in the current step 1 step range 1 step range Range which slows down with 3 steps or more Hz maintaining range AC17 Field setting 3 41 Range which accelerates with the step amount set in the setting mode Target Lpm Target Lpm 0 015 MPa Target Lpm 0 08 MPa MODE 17 24 ...

Page 113: ...ecification Fan tap 7 is maintained for 1 minute Set 3 k Driving condition of the outdoor unit fan At operation mode 0 At operation mode 64 65 70 k Control specification Fan tap 4 is maintained for 1 minute No Display of setting items Display of setting conditions Setting item H1P H2P H3P H4P H5P H6P H7P 3 42 Setting method of the outdoor unit fan control at snow k k h k h k h Fan tap 0 passes con...

Page 114: ...load of the showcase there No Display of setting items Display of setting conditions Setting item H1P H2P H3P H4P H5P H6P H7P 3 07 Back up output setting when AIRNET is set Output method of Caution output during communication box connection k h h h k k k H1P H2P H3P H4P H5P H6P H7P No output Factory setting k h h h h h k Output k h h h h k h YES NO OR YES NO YES NO H P mode prohibition Setting mod...

Page 115: ...ode 3 59 C Factory setting 0 C Setting mode 3 62 C Factory setting 5 C Guard timer of heating capacity increasing 5 30 minutes Min Tset Tr 1 C Setting mode 3 58 C Factory setting 0 C Setting mode 3 61 C Factory setting 4 C Max Tset Tr 1 C Setting mode 3 59 C Factory setting 0 C Setting mode 3 63 C Factory setting 8 C The number of Thermo ON 3 Setting mode 2 63 HP 1 96MPa Setting mode 3 47 continuo...

Page 116: ...of high pressure HP f f Target Tc 0 294MPa Ta 25 C Min Tr 25 C Setting mode 2 42 Min Tset Tr 3 C 1 C is subtracted every 5 minutes Max Tset Tr 7 C 1 C is subtracted every 5 minutes Min Tset Tr 1 C Setting mode 3 58 C Factory setting 0 C Setting mode 3 61 C Factory setting 4 C Max Tset Tr 1 C Setting mode 3 59 C Factory setting 0 C Setting mode 3 63 C Factory setting 8 C It is the batch heating str...

Page 117: ...1 C k h h h h k h Set 2 Correction value 0 2 C k h h h k h h Set 3 Correctionvalue 0 2 5 C k h h k h h h Set 4 Correction value 0 3 C k h k h h h h H1P H2P H3P H4P H5P H6P H7P No limit Factory setting k h h h h h k 32A k h h h h k h 30A k h h h k h h 25A k h h k h h h H1P H2P H3P H4P H5P H6P H7P Fan step 11 k h h h h h k Fan step 9 k h h h h k h Fan step 8 k h h h k h h Fan step 10 k h h k h h h O...

Page 118: ...r more For details refer to the functional description k k h h h h h 38 Temperature difference between the suction air temperature and the set temperature when the outdoor evaporating mode is prohibited Purpose When outdoor evaporating mode is prohibited this setting will prevent from activating outdoor evaporating mode even if the suction air temperature drops below the set temperature Factory se...

Page 119: ...essor step 18 k h h h k h h H1P H2P H3P H4P H5P H6P H7P INV compressor step 20 Factory setting h h h h h h h INV compressor step 20 h h h h h h k INV compressor step 20 h h h h h k h INV compressor step 18 h h h h h k k INV compressor step 17 h h h h k h h INV compressor step 16 h h h h k h k INV compressor step 15 h h h h k k h H1P H2P H3P H4P H5P H6P H7P Target SC 5 C Factory setting k h h h h h...

Page 120: ...correction Purpose It uses it to adjust improvement down of the heating capacity Refer to details to another page k k k k k k k Correction temperature H1P H2P H3P H4P H5P H6P H7P Set 0 factory setting 0 C k h h h h h h Set 1 2 C k h h h h h k Set 2 1 C k h h h h k h Set 3 1 C k h h h h k k Set 4 2 C k h h h k h h Set 5 3 C k h h h k h k Set 6 4 C k h h h k k h Set 7 5 C k h h h k k k Set 8 6 C k h...

Page 121: ...oor unit and booster AIRNET compatible set the R 407C Conveni Pack format to ON Note AIRNET will report malfunctions for both the outdoor unit and booster However time stamp data provided only with malfunctions for the outdoor unit will appear corrupted Use the translation table on the following page to read the time stamps No Display of setting items Display of setting conditions Setting item H1P...

Page 122: ...5P H6P H7P Detecting malfunction for LP2 drop permit factory setting k h h h h h k Mask setting for detecting malfunction for LP2 drop k h h h h k h H1P H2P H3P H4P H5P H6P H7P 30 C factory setting k h h h h h k 28 C k h h h h k h 27 C k h h h k h h 25 C k h h k h h h H1P H2P H3P H4P H5P H6P H7P LP1 0 0294 Minimum Hz LP factory setting k h h h h h k LP1 0 196MPa k h h h h k h LP1 0 245MPa k h h h ...

Page 123: ... Purpose It uses it to adjust improvement down of the heating capacity Refer to details to another page k k k k k h h Heating capacity_ high pressure correction H1P H2P H3P H4P H5P H6P H7P Set 0 factory setting 0MPa k h h h h h k Set 1 0 098MPa k h h h h k h Set 2 0 098MPa k h h h k h h Correction temperature H1P H2P H3P H4P H5P H6P H7P Set 0 factory setting 0 C k h h h h h k Set 1 2 C k h h h h k...

Page 124: ...Set 1 5 C k h h h h h k Set 2 6 C k h h h h k h Set 3 7 C k h h h h k k Set 4 8 C k h h h k h h Set 5 9 C k h h h k h k Set 6 10 C k h h h k k h Set 7 11 C k h h h k k k Set 8 12 C k h h k h h h Set 9 13 C k h h k h h k Set 10 14 C k h h k h k h Set 11 15 C k h h k h k k Set 12 16 C k h h k k h h Set 13 1 C k h h k k h k Set 14 2 C k h h k k k h Set 15 3 C k h h k k k k Heating capacity _ suction ...

Page 125: ...BS5 LED 1 SW H1P H2P H3P H4P H5P BS1 BS2 BS3 BS4 BS5 H6P H7P LED 2 SW H1P H2P H3P H4P H5P H6P H7P LED 3 SW H1P H2P H3P H4P H5P H6P H7P LED 4 SW H1P H2P H3P H4P H5P H6P H7P LED LED 5 SW H1P H2P H3P H4P H5P H6P H7P LED 6 SW H1P H2P H3P H4P H5P H6P H7P SW ON OFF BLINK BS button 1 Page 0 Normal operating condition Press and hold BS1 MODE for 5 seconds 3 Previous setting status blinking Setting status ...

Page 126: ...Ambient temp Tax1 8 k h h h h h k Tay1 Ambient temp Tax2 9 Ambient temp Tay2 11 Set 1 Ambient temp Tax1 9 k h h h h k h Tay1 Ambient temp Tax2 10 Ambient temp Tay2 11 Set 2 Ambient temp Tax1 7 k h h h k h h Tay1 Ambient temp Tax2 8 Ambient temp Tay2 11 Set 3 Ambient temp Tax1 11 k h h k h h h Tay1 Ambient temp Tax2 Ambient temp Tay2 Fan tap 11 Tap 8 9 or 10 Tap 7 8 or 9 Tap Tax1 Tay1 Tax2 Tay2 Tam...

Page 127: ...p Tax2 9 10 Ambient temp Tay2 8 9 Set 2 Ambient temp Tax1 11 11 k h h h k h h Tay1 Ambient temp Tax2 10 11 Ambient temp Tay2 9 10 Set 3 Ambient temp Tax1 11 11 k h h k h h h Tay1 Ambient temp Tax2 Ambient temp Tay2 Fan tap 9 11 Tap 8 11 Tap 8 11 Tap Tax1 Tay1 Tax2 Tay2 Tamb ambient temp C Tax1 Tay1 Tax2 Tay2 H1P H2P H3P H4P H5P H6P H7P 0 C 2 C 5 C 7 C k h h h h h k 5 C 3 C 0 C 2 C k h h h h k h 10...

Page 128: ...S4 BS5 LED 1 SW H1P H2P H3P H4P H5P BS1 BS2 BS3 BS4 BS5 H6P H7P LED 2 SW H1P H2P H3P H4P H5P H6P H7P LED 3 SW H1P H2P H3P H4P H5P H6P H7P LED 4 SW H1P H2P H3P H4P H5P H6P H7P LED LED 5 SW H1P H2P H3P H4P H5P H6P H7P LED 6 SW H1P H2P H3P H4P H5P H6P H7P LED 7 SW H1P H2P H3P H4P H5P H6P H7P SW ON OFF BLINK BS button Press and hold B1 MODE for 5 seconds Press BS2 SET to cycle through the number of fa...

Page 129: ...D 4 SW H1P H2P H3P H4P H5P H6P H7P LED LED 5 SW H1P H2P H3P H4P H5P H6P H7P LED 6 SW H1P H2P H3P H4P H5P H6P H7P LED 7 SW H1P H2P H3P H4P H5P H6P H7P SW ON OFF BLINK BS button 1 Page 0 Normal operating condition Press and hold B1 MODE for 5 seconds 4 Previous setting status flashes Setting status shown at left OFF Press BS2 SET to cycle through the start times Press BS2 SET a few times 21 00 22 00...

Page 130: ...4 SW H1P H2P H3P H4P H5P H6P H7P LED LED 5 SW H1P H2P H3P H4P H5P H6P H7P LED 6 SW H1P H2P H3P H4P H5P H6P H7P LED 7 SW H1P H2P H3P H4P H5P H6P H7P SW ON OFF BLINK BS button 1 Page 0 Normal operating condition Press and hold BS1 MODE for 5 seconds 4 Previous setting status flashes Setting status shown at left OFF Press BS2 SET to cycle through the stop times Press BS2 SET a few times 7 00 8 00 9 0...

Page 131: ...S4 BS5 BS1 BS2 BS3 BS4 BS5 LED 1 SW H1P H2P H3P H4P H5P BS1 BS2 BS3 BS4 BS5 H6P H7P LED 2 SW H1P H2P H3P H4P H5P H6P H7P LED 3 SW H1P H2P H3P H4P H5P H6P H7P LED 4 SW H1P H2P H3P H4P H5P H6P H7P LED LED 5 SW H1P H2P H3P H4P H5P H6P H7P LED 6 SW H1P H2P H3P H4P H5P H6P H7P LED 7 SW H1P H2P H3P H4P H5P H6P H7P SW ON OFF BLINK BS button 1 Page 0 Normal operating condition Press and hold BS1 MODE for ...

Page 132: ...to Figure 2 or connect it to terminal C refer to Figure 3 The terminal connectors must be protected with insulation sleeves By using the Setting Mode 2 11 you can change the amount of evaporating temperature shift that is allowed during the night time evaporating temperature correction The shift amount is factory setting to 1 C Moreover the signal from the external contact will take precedence ove...

Page 133: ...the C BOX Refer to Figure 1 for wiring procedures Note be sure to insulate the terminals with a sleeve or similar material The amount of speed reduction to apply to the night quiet mode can be set in setting mode 2 7 The fan is factory setting to no upper limit Note if both AIRNET and the external contacts are used both settings will be enabled Note Since this wiring is weak electrical ensure the ...

Page 134: ...A When using switches other than for minute electric currents use contact relays for minute electric currents 1 as shown below Field wiring specifications Recommended wire sheathed PVC cord or 2 wire cable of 0 75 1 25mm2 Wiring length Within 100m Separate from the power line to prevent malfunctions zExamples of wire connection and cautions Outdoor unit Booster unit X1A X1M A6P A B C ON OFF REMOTE...

Page 135: ...sing this unit as a condensing unit this switch sets the target evaporating temperature in increments of 5 C Factory setting 35 C This is an upper limit cut off applied to the compressor operating frequency It allows the compressor to run in low noise mode Caution Causes performance loss Performance drops by about 25 Operating noise lowers by about 3 dB Open phase power supply setting This unit ca...

Page 136: ... to protect the compressor The BS button allows you to change the evaporating temperature set at the DIP switch within a range of 4K to 4K in 1K increments This can also be used to adjust for suction pressure loss based on the frequency For setting procedures refer to the pages after this page Do not set the target evaporating temperature to 45 C or less Doing so may damage the compressor or cause...

Page 137: ...46 6 95 2 89 27 C 1 94 1 61 2 57 1 68 3 52 1 76 4 33 2 11 5 53 2 46 6 95 2 89 32 C 1 94 1 61 2 57 1 68 3 52 1 76 4 33 2 11 5 53 2 46 6 95 2 89 38 C 1 86 1 61 2 39 1 68 3 27 1 76 4 04 2 11 5 20 2 46 6 56 2 89 43 C 1 81 1 61 2 30 1 68 3 10 1 76 3 87 2 11 5 00 2 46 6 34 2 89 H1P H2P H3P H4P H5P H6P H7P Tsp1_B 0 C Factory setting k h h h h h h 1 C 0 0196MPa k h h h h h k 2 C 0 0192MPa k h h h h k h 3 ...

Page 138: ...any heat sources e g OA equipment located in a room 4 The system does not operate The system stops and immediately restarts operation If the OPERATION lamp on the remote controller turns ON the system will be normal These symptoms indicate that the system is controlled so as not to put unreasonable loads on the system Normal operation The system will automatically start operation after a lapse of ...

Page 139: ...brought to fan LL operation so that no one gets cold air Furthermore if fan operation mode is selected when other indoor unit is in heating the system will be brought to fan LL operation The fan LL operation is also enabled while in oil return mode in cooling Normal operation 9 The airflow direction is not reproduced according to the setting The airflow direction is not corresponding to that displ...

Page 140: ... changes the operating frequency Normal operation 12 Dust comes out from the system Dust comes out from the system when it restarts after the stop for an extended period of time Dust which has deposited on the inside of indoor unit is blown out from the system Normal operation 13 Odors come out from the system In operation Odors of room cigarettes or else adsorbed to the inside of indoor unit are ...

Page 141: ...ions Setting status list Clock setting Language changeover Basic Screen Operation mode changeover Fan speed control Menu display Confirmation of each setting On Off Cancel Operation lamp Field Setting Menu Test operation ON OFF Register Service Contract Field setting list Group No setting Indoor unit AIRNET No set Outdoor unit AIRNET No set Error record Indoor status display Outdoor status display...

Page 142: ...Troubleshooting SiBE811001EB 141 CONVENI PACK ...

Page 143: ...ller or the operation switch or recycle power 6 Lowpressure error E4 Low pressure sensor for refrigeration equipment LP1 0 025 MPa LPS1 activated 3 sec continuously STD1 only Sensor activated after cooling equipment ran 3 hours continuously after power was turned ON 19 INV compressor stops STD1 compressor stops INV compressor standby time 90 sec STD compressor standby time 5 min Retry counter clea...

Page 144: ...ror 1 F3 retry code 10 F3 output 14 ON if AIRNET not present STD2 compressor stops due to error 20 Wet operation from refrigeration suction pipe F4 Suction thermistor Discharge thermistor High pressure sensor Low pressure sensor These conditions continued for 10 minutes Suction SH 5 K Discharge SH 5 K ON if compressor on refrigeration equipment is running ON if AIRNET not present 1 00 Reset the re...

Page 145: ...0 V for 30 sec or more continuous 32 CT2 sensor error CT2 sensor Stopped A_STD2 40 0 A for 5 sec or more continuous ON if compressor on refrigeration equipment side is running ON if AIRNET not present 1 02 STD2 compressor stops Running A_STD2 2 0 A 400 V for 30 sec or more continuous 33 Td1thermistor error F3 or J3 Td1 thermistor Td1 165 C ON if compressor on refrigeration equipment side is runnin...

Page 146: ...r stops due to error ON if compressor on cooling equipment side is running 1 L4 retry count 8 L4 output 00 L4 output to AIRNET Reset the remote controller or the operation switch or recycle power 9 OFF ON if AIRNET not present 10 INV compressor stops due to error 44 INV compressor momentary overcurrent L5 Inverter PCB Overcurrent 65 A DC flowed through power transistor 7 INV compressor stops STD1 ...

Page 147: ...o AIRNET Reset the remote controller or the operation switch or recycle power 50 Reverse phase error U1 Outdoor unit main PCB Reverse phase or open phase detected when power was turned ON OFF ON 1 00 Tested only when power is turned ON Recycle power 51 INV compressor voltage too low U2 Inverter PCB DC voltage was 190 V or less 7 INV compressor stops STD1 STD2 compressors stop Standby 1 6 min 8th r...

Page 148: ...t 00 EJ Recycle booster power or reset operation switch 14 INV compressor stops BU_Td 90 C standby 1 5 6 min Retry counter decrements 1 when INV compressor runs 10 min or more total 15th retry INV compressor stops due to error R2 signal goes OFF during retry standby 7 Discharge pipe thermistor error F3 or J3 Discharge pipe temperature thermistor Td 165 C After sensor error occurs the substitute va...

Page 149: ...e counter reset when INV compressor runs 1 min or more in total 10th retry INV compressor stops due to error R2 signal goes OFF during retry standby INV compressor stops due to error ON when outdoor unit is running ON if AIRNET not present 1 L9 retry count 10 L9 output 00 EJ Recycle booster power or reset operation switch 17 INV compressor INV to INV transmission error LC Inverter PCB Transmission...

Page 150: ...Troubleshooting SiBE811001EB 149 CONVENI PACK ...

Page 151: ...on specified for the particular model 1 Checking an error or warning Operation Status Display Abnormal shutdown The system stops operating The operation lamp green starts to blink The message Error Press Menu button will appear and blink at the bottom of the screen Warning The system continues its operation The operation lamp green remains on The message Warning Press Menu button will appear and b...

Page 152: ...rresponding data will be displayed For details refer to the table below Basic screen Field setting mode Service mode Press and hold Cancel button for 4 seconds or more Press and hold Cancel button for 4 seconds or more Service Menu Item 2 Remarks 1 Model Name Display 1 Unit No Select the Unit No you want to check 2 Indoor unit 3 Outdoor unit 2 Operating Hours Display 1 Unit No Select the Unit No y...

Page 153: ...kyAir VRV 6 Th1 Outdoor air thermistor 7 R2T Heat exchanger thermistor 8 R3T Discharge pipe thermistor 5 Forced Defrost SkyAir only 1 Forced defrost ON Enables the forced defrost operation 2 Forced defrost OFF Disables the forced defrost operation 6 Error Display Selection 1 Warning display ON Displays a warning on the screen if an error occurs 2 Warning display OFF No warning is displayed 3 Error...

Page 154: ...n function OFF Note The test operation function will turn off automatically 30 minutes after the test operation function is turned ON Select Test operation ON OFF and press Menu Enter button To start a test operation press the On Off button within 10 seconds after this screen is displayed Test operation will be displayed Service settings menu is displayed Basic screen is displayed Basic screen is ...

Page 155: ...e action Operation Status Display Abnormal shutdown The system stops operating The operation lamp green starts to blink The message Error Press Menu button will appear and blink at the bottom of the screen Warning The system continues its operation The operation lamp green remains on The message Warning Press Menu button will appear and blink at the bottom of the screen Press the Menu Enter button...

Page 156: ...d set program addresses Usually used in servicing the system H1P ON Used to check the contents set in Setting mode 2 H1P Blink Mode changing procedure Using the MODE button the modes can be changed follows BS1 MODE BS2 SET BS3 RETURN BS4 BS5 RESET TEST Setting mode 1 Monitor mode H1P Press the BS1 MODE button once MODE Blink MODE MODE OFF H1P Setting mode 2 MODE ON H1P Press and hold the BS1 MODE ...

Page 157: ... Defective the electronic expansion valve Y3E k h h k h h h Defective the electronic expansion valve Y4E k h k h h h h Defective the electronic expansion valve Y5E Data k h h h h h k Defective the low pressure sensor for refrigeration S1NPL1 k h h h h k h Defective the low pressure sensor for air conditioning S1NPL2 k h h h k h h Defective the high pressure sensor S1NPH1 k h h k h h h Defective th...

Page 158: ... h l l l h EH Communication error outdoor units Booster unit l k h l h l l EJ Defective refrigeration Booster unit alarm l k h l l h l F3 Defective the discharge pipe temperature Td error l h k h l h l l k h h h l l F4 Wet operation from refrigeration suction pipe l k h h k h h F5 Wet operation from injection pipe l k h h k h k H0 Defective 3 sensors l h k h l h h l k h h h h h H3 Defective high p...

Page 159: ...or l k h l h h h L9 Inverter compressor starting failure l k h l h h l LC Defective transmission between inverter and main PCB l k h l l h h P1 Inverter over ripple protection l h k l h h h l k h h h h l P4 Defective inverter radiating fin temperature rise sensor l k h h l h h PJ Defective field setting after replacing outdoor unit main PCB or faulty combination of PCB l k h l l h l U1 Reverse pha...

Page 160: ...F Setting mode 2 Used to modify the operation states and set program addresses Usually used in servicing the system H1P ON Monitoring mode Used to check the contents set in Setting mode 2 H1P Blink Mode changing procedure Using the MODE button the modes can be changed follows BS1 MODE BS2 SET BS3 RETURN BS4 BS5 RESET TEST Setting mode 1 Monitor mode H1P MODE Blink MODE OFF H1P Setting mode 2 MODE ...

Page 161: ...on of setting item Confirmation on setting contents Press the RETURN BS3 button and switches to the initial status of the Monitor mode Press the MODE BS1 button and returns to Setting mode 1 Press the RETURN BS3 button to display different data of set items SET BS2 Date Data k h h h h k h Detect the earth leakage in the inverter system Data k h h h h h k Defective the electronic expansion valve Y1...

Page 162: ...current of inverter compressor l k h l h h h L9 Inverter compressor starting failure l k h l h h l LC Defective transmission between inverter and control PCB l k h l l h h P4 Defective inverter radiating fin temperature rise sensor l h k l h h h l k h h l h h PJ Faulty field setting after replacing main pcb or faulty combination of PCB l k h l l h l U0 Refrigerant shortage alert Refrigerant shorta...

Page 163: ...uses Actuation of external protection device Improper field setting Defective indoor unit PCB Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged External protection device is connected to terminals T1 and T2 of the indoor unit terminal strip YES YES NO NO The setting position is set to 03 Check the setting state of the...

Page 164: ...atile memory Maintains memory contents even when the power supply is turned OFF Supposed Causes External factor Noise etc Defective indoor unit PCB Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Turn power supply OFF then power ON again The indoor unit PCB is normal External factor other than error for example nois...

Page 165: ... Error Detection By float switch OFF detection Error Decision Conditions When rise of water level is not a condition and the float switch goes OFF Supposed Causes 200V power supply is not provided Defective float switch or short circuit connector Defective drain pump Drain clogging upward slope etc Defective indoor unit PCB Loose connection of connector ...

Page 166: ...ndoor unit PCB The drain pump works when the power supply is reset for the indoor unit The voltage of terminals Y1 and Y2 or X25A is 200V within 5 minutes of resetting the power supply A short circuit connector is connected to X8A NO NO Becomes normal when X8A of the indoor unit PCB is short circuited YES YES NO YES The float switch functions normally Connect either a short circuit connector or fl...

Page 167: ...upposed Causes Broken wires in short circuit of or disconnection of connectors from the fan motor harness Defective fan motor Broken wires or defective insulation Abnormal signal output from the fan motor Defective circuit Defective PCB Instantaneous disturbance in the power supply voltage Fan motor lock Due to motor or external causes The fan does not rotate due to foreign matters blocking the fa...

Page 168: ...onnect the connector from the fan motor and then make measurement of resistance between pins 2 Is the resistance between the pins not less than the judgement criteria Remove the foreign matters Properly connect the connector Replace the fan motor Replace the fan motor Replace the indoor unit PCB FXFQ 1 2 3 FG 4 Vsp 5 Vcc Vdc 1 GND 2 3 Judgement Criteria Measuring point Criteria FG GND Not less tha...

Page 169: ... indoor unit fan motor Broken wires Defective contact Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Are the X4A and X27A connectors securely connected Is the power of approx 12VDC supplied between the Pins1 and 3 when the X27A is disconnected and the power supply turns ON NO YES YES NO Properly connect the connect...

Page 170: ... the current flow on the fan PCB when the fan motor starting operation Error Decision Conditions An overcurrent flows The RPM is less than a certain level for 6 seconds A position error in the fan rotor continues for 5 seconds or more Supposed Causes The clogging of a foreign matter The disconnection of the fan motor connectors X1A and X2A The disconnection of the connectors between the indoor uni...

Page 171: ...ctors between the indoor unit PCB A1P and the fan PCB A2P are disconnected The fuse F2U white on the fan PCB A2P has no continuity The fan can be moved lightly by hand after the fan motor connector of the fan PCB A2P is removed The resistance between the power wire terminals of the fan motor and motor frame metal part is 1 MΩ or below Remove the power wire connector from the fan motor and measure ...

Page 172: ...r Replace the fan PCB A2P Replace the fan motor 1 Measurement of power wire connector Remove the X1A connector from the fan PCB A2P and measure the resistance between the U and V V and W and W and U phases of the motor connector with 5 conductors and check that each phase are balanced within a permissible dispersion range of 20 2 Measurement of signal wire connector Remove the X2A connector and me...

Page 173: ...ation Supposed Causes Defective power supply for indoor unit fan motor Clogging drain piping Actuation of indoor unit fan protection device Poor fan wiring contact Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Is the power supply for indoor unit fan connected correctly Restart Operation is normal NO YES YES NO Con...

Page 174: ...ror Decision Conditions When ON OFF of the micro switch for positioning cannot be reversed even though the swing flap motor is energized for a specified amount of time about 30 seconds Error code is displayed but the system operates continuously Supposed Causes Defective swing motor Defective connection cable power supply and limit switch Defective airflow direction adjusting flap cam Defective in...

Page 175: ...m apart reassemble and turn ON again Is power supply 200V provided The swing motor works when the power supply is turned OFF and then restart The connector is connected to X9A of the indoor unit PCB The limit switch functions normally The relay cable is short circuited or disconnected After turning the swing flap ON and then stopping with the remote controller the voltage of X6A of the indoor unit...

Page 176: ... Instantaneous blackout others Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged NO YES YES Check and correct each wiring There are problems on the condition of power supply described above A8 Reoccurrence of error Check the condition of the power supply Check if power supply voltage is 200V 10 Check if there is power...

Page 177: ...y by using micro computer Error Decision Conditions Pin input for electronic expansion valve coil is abnormal when initializing micro computer Either of the following conditions is seen caused occurs while the unit stops operation z Temperature of suction air R1T temperature of liquid pipe of heat exchanger R2T 8 C z Temperature of liquid pipe of heat exchanger R2T shows fixed degrees or below Sup...

Page 178: ...ort circuit or disconnected YES 1 How to check the coil of electronic expansion valve drive Remove the connector for electronic expansion valve X7A from PCB Measure the resistance value between pins and check the continuity to judge the condition White 1 Red 5 Orange 3 φ1 φ3 M φ2 φ4 Yellow 2 Brown 6 Blue 4 1 White 2 Yellow 3 Orange 4 Blue 5 Red 6 Brown When restarting the operation after shutting ...

Page 179: ...on valve Replace the relay cables When restarting the operation after shutting the power supply OFF does not work replace the indoor unit PCB Electronic expansion valve is connected to X7A of indoor unit PCB Coil check 1 of electronic expansion valve drive indicates normal Relay cables short circuit or disconnected 1 How to check the coil of electronic expansion valve drive Remove the connector fo...

Page 180: ...on operation Error code is displayed but the system operates continuously Supposed Causes Humidifier unit optional accessory leaking Defective drain piping upward slope etc Defective indoor unit PCB Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged NO YES Modify the drain piping NO YES Check if the humidifier unit is ...

Page 181: ...the capacity code is not saved to the PCB and the capacity setting adaptor is not connected When a capacity that does not exist for that unit is set Supposed Causes The capacity setting adaptor was not installed Defective indoor unit PCB Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged NO Replace the indoor unit PCB ...

Page 182: ...eck the condition of transmission between indoor unit PCB A1P and fan PCB A2P using computer Error Decision Conditions When normal transmission is not conducted for certain duration Supposed Causes Connection defect of the connecter between indoor unit PCB A1P and fan PCB A2P Defective indoor unit PCB A1P Defective fan PCB A2P External factor such as instantaneous blackout ...

Page 183: ...X70A back to original condition Determination 01 Normal Other than 01 Transmission defect on indoor unit PCB Connect the connector accurately NO Replace the indoor unit PCB A1P NO Replace the fan PCB A2P YES Connect it and operate It is possible to have a cause such as instantaneous blackout NO Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may ...

Page 184: ...d thermistor Refer to P 293 Error code Thermistor Electric symbol C4 Heat exchanger liquid pipe thermistor R2T C5 Heat exchanger gas pipe thermistor R3T C9 Suction air thermistor R1T NO Is the operation normal Remove the thermistor from the indoor unit PCB and then make resistance measurement of the thermistor using a multiple meter Is it normal 5 kΩ to 90 kΩ Replace the indoor unit PCB YES Normal...

Page 185: ...an PCB A2P Connection defect of capacity setting adaptor Setting mistake on site Troubleshooting Replace it with correct fan PCB A2P NO Install correct capacity setting adaptor NO NO After establishing transmission for indoor and outdoor diagnose the operation again YES Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Is the type of...

Page 186: ...hermistor Defective indoor unit PCB Troubleshooting Refer to P 293 Remove the discharge air thermistor R4T from the indoor unit PCB and then insert it again NO Is the operation normal Is it normal 5 kΩ to 90 kΩ Remove the thermistor from the indoor unit PCB and then make resistance measurement of the thermistor using a multiple meter Replace the thermistor R4T NO Normal The error is caused by defe...

Page 187: ...t is running Error code is displayed but the system operates continuously Supposed Causes Defective remote controller thermistor Defective remote controller PCB Troubleshooting Note 1 How to delete the record of error codes Press the Operate Stop button for 4 seconds and more while the error code is displayed in the inspection mode Clear the malfunction code history 1 Is CJ displayed on the remote...

Page 188: ... of Error Detection Detects the overcurrent with current sensor CT Error Decision Conditions Error is decided when the detected current value exceeds 15 0A for 2 seconds Supposed Causes Stop valve is not opened Obstacles at the air outlet Improper power voltage Defective magnetic switch Defective compressor Defective current sensor A7P A8P ...

Page 189: ...orrect the power supply voltage NO Replace the magnetic switch NO Correct wiring NO Replace the corresponding current sensor A7P or A8P NO Replace the compressor YES Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Is the stop valve open Obstacle exists around the air outlet Is the power supply voltage normal Is the magnetic switch ...

Page 190: ...or unit and the outdoor unit are not normal Supposed Causes Defective outdoor unit PCB A1P Defective connection of inside outside relay wires Troubleshooting External factor other than error for example noise etc YES Connect the inside outside relay wires correctly YES Replace the outdoor unit main PCB A1P NO Caution Be sure to turn off the power switch before connecting or disconnecting connector...

Page 191: ... Conditions When there is a earth leakage breaker ON OFF Within 10 seconds after the power is turned ON When there is a earth leakage leakage detector PCB If the high pressure switch is activated but the pressure is not very high Supposed Causes Compressor or the complete product has defective insulation High pressure switch connection failure Defective leakage detector PCB No continuity in high p...

Page 192: ... to temporary liquid return or refrigerant slugging Earth leakage is possible in the event of power failure during operation or prolonged power shutoff YES Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged YES YES YES YES YES YES More than 10 seconds passed since power ON Shut OFF power Remove the compressor lead wire No defective in...

Page 193: ...neous power failure Defective high pressure sensor Troubleshooting Are the 3 points above OK 1 Mount a pressure gauge on the high pressure service port 2 Reset the operation using the remote controller and then restart the operation YES Replace the high pressure switch NO Rectify the defective points if any NO Replace the high pressure sensor NO Caution Be sure to turn off the power switch before ...

Page 194: ...rvice checker to compare the high pressure value and the actual measurement value by pressure sensor Refer to 1 by using the service checker Check if the high pressure value and the actual measurement value by pressure sensor are the same YES The high pressure sensor is normal and the pressure detected with the PCB is also normal The high pressure has really become high CHECK 1 Referring to inform...

Page 195: ...ity is detected by the pressure value with the low pressure sensor Error Decision Conditions Error is generated when the low pressure is dropped under compressor operation Operating pressure 0 015MPa Supposed Causes Abnormal drop of low pressure Defective low pressure sensor Defective outdoor unit PCB Stop valve is not opened Refrigerant shortage Moisture choke ...

Page 196: ...CB A1P NO Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged YES YES YES 1 Mount a pressure gauge on the low pressure service port 2 Reset the operation using the remote controller and then restart the operation Service Checker Connect the service checker to compare the low pressure value and the actual measurement value by pressure s...

Page 197: ...ing secondary side unit electronic expansion valve Oil not returned due to defective local piping setting Liquid pack due to defective operation signal connection Troubleshooting Check if the stop valve is open Check if the relay wires to the compressor are correct Check if the connection of UVW phase order is correct Check if the wiring is the same as in the wiring diagram The insulation resistan...

Page 198: ...ity of instantaneous power failure etc NO Continue the operation NO Replace the inverter compressor The inverter PCB is not error Return the inverter PCB to original position YES YES YES A Restart and check the operation Check if the condition occurs again Check if the start mode is in the high differential pressure more than 0 5 MPa Power ON Conclude the work There is a possibility of defect of p...

Page 199: ...uring the fan motor operation Error Decision Conditions In the condition of fan motor rotation the number of rotation is below the fixed number for more than 6 seconds System down is caused by 4 times of detection Supposed Causes Failure of fan motor Defect or connection error of the connectors harness between the fan motor and PCB The fan can not rotate due to any foreign substances entangled Cle...

Page 200: ...olor of relay connectors k Fan motor 1 Both power supply wire and signal wire are all white k Fan motor 2 Both power supply wire and signal wire are red in the PCB side and white in the motor side NO NO Cut the power supply OFF and wait for 10 minutes Check if any foreign substances around the fan Check if any connector is disconnected Relay connectors have any connection error A Remove the foreig...

Page 201: ...or 2 NO NO NO NO NO NO A No continuity of fuse F1U on the fan inverter PCB Unable to rotate the fan manually with ease when removing the connector of the fan motor Resistance value between the power supply wire terminal of fan motor and the motor frame metal is 1MΩ and below The resistance value between UVW phases of fan motor is out of balance or short circuit between UVW phases The signal wire s...

Page 202: ...eck disconnection of connector To be detected based on continuity existence of electronic expansion valve coil Error Decision Conditions No current is detected in the common COM when power supply is ON Supposed Causes Disconnection of connectors for electronic expansion valve Y1E Y5E Defective electronic expansion valve coil Defective outdoor unit main PCB or sub PCB ...

Page 203: ...PCB A1P or A2P YES Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Turn power supply OFF and turn power supply ON again Return to normal Check the electronic expansion valve corresponding to the error code E9 in the monitor mode NO YES The connector of outdoor unit PCB A1P for electronic expansion valve is connected The coil resist...

Page 204: ...booster unit Error Decision Conditions LP Td Tg Tl sensors go OFF during abnormalities Supposed Causes Refer to the back of each sensor on the booster unit Troubleshooting Replace the thermistor sensor concerned Is the booster unit abnormal LED H2P is blinking or ON Replace the booster unit PCB YES NO Caution Be sure to turn off the power switch before connecting or disconnecting connectors or par...

Page 205: ...ting temperature setting is 20 degree or less by communication box Supposed Causes The target evaporating temperature setting is 20 degree or less by communication box Troubleshooting The target evaporating temperature setting of outdoor unit by communication box is 20 C or less The target evaporating temperature setting of outdoor unit is 20 C or more Turn DS2 4 of main PCB A1P OFF NO YES Caution...

Page 206: ...ormally for a certain amount of time Supposed Causes Outdoor unit to booster unit transmission wiring F1 F2 disconnection short circuit or wrong wiring Booster unit power supply is OFF Troubleshooting The booster s power supply was turned OFF Transmission wire between outdoor unit and booster unit is break Restore the transmission wire YES Turn ON the power supply for the booster unit Replace the ...

Page 207: ...ion failure between outdoor and booster units Supposed Causes Broken of connection wire between the outdoor and booster unit Booster unit system down Troubleshooting Is the connection wire between the outdoor and booster units normal Is the LED display on the booster unit abnormal Conduct error diagnosis for the booster unit YES Repair connection wire Replace the booster unit PCB NO NO YES Caution...

Page 208: ...erature 110 C Electronic expansion valve Y2E 450 pls Electronic expansion valve Y3E continues for consecutive 60 sec or more Check if discharge pipe thermistor property is normal Replace the discharge pipe thermistor NO Replace the outdoor unit main PCB A1P NO Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged YES YES Connect the serv...

Page 209: ...fective thermal insulation or defective resistance value Defective valve body at the electronic expansion valves Y1E Y2E of the booster unit disconnected coil or defective coil YES Repair the defective parts Repair the defective parts YES YES Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged YES NO NO NO Defective expansion valve at ...

Page 210: ...ischarge pipe temperature 60 C Wrong wiring of electronic expansion valves Y2E Y5E defective electronic expansion valve body Y2E Y5E defective coil or disconnected coil Disconnected plate type heat exchanger outlet thermistor R4T defective thermal insulation or defective resistance value YES Repair the defective parts Repair the defective parts Check whether charging amount of refrigerant onsite i...

Page 211: ...r R21T X30A Suction pipe thermistor R22T Plate type heat exchanger outlet thermistor R4T Liquid temperature thermistor outdoor unit heat exchanger outlet R6T High pressure sensor S1NPH1 X32A Low pressure sensor Refrigeration S1NPL1 X31A Low pressure sensor Air conditioning S1NPL2 X31A Sub PCB Intermediate pressure sensor S1NPH2 X32A Sub PCB Properly connect it NO Replace the relevant sensor NO Rep...

Page 212: ... pressure switch Defective connection of the connector of high pressure switch Defective compressor Defective outdoor unit PCB Broken wire in lead wire Troubleshooting Replace the lead wire NO Replace the high pressure switch having no continuity in it Normal resistance Not more than 10Ω NO Properly connect it NO Replace the outdoor unit PCB YES Caution Be sure to turn off the power switch before ...

Page 213: ...ch Low pressure switch connector connection failure Defective compressor Defective outdoor unit PCB Broken lead wire Four way valve Y3R action failure Troubleshooting Is the protective HPS connector connected to the outdoor unit PCB correctly Is there continuity in the control or protection HPS Is there continuity in the lead wire Stop the device for 10 minutes before moving on to the next check Y...

Page 214: ...s LRYEQ16AY1 Method of Error Detection Detection of abnormal signal from fan motor Error Decision Conditions In case of detection of abnormal signal at starting fan motor Supposed Causes Abnormal fan motor signal circuit error Broken short or disconnection connector of fan motor connection cable Fan Inverter PCB error A5P A9P ...

Page 215: ...CB A9P YES Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Cut the power supply OFF Check the fan motor corresponding to the error code H7 in the monitor mode Check the connector of the fan motor 1 YES Check if signal wire connector for the corresponding fan motor is normal Check if the resistance of the fan motor lead wire between...

Page 216: ...ective thermistor connection Defective outdoor air thermistor Defective outdoor unit PCB A1P Troubleshooting Refer to P 293 YES Check if connector is connected to X18A of outdoor unit PCB A1P Resistance is measured with a tester after disconnecting the thermistor from the outdoor unit PCB Is it normal Is the resistance normal Connect correctly NO Replace the outdoor air thermistor R1T NO Replace t...

Page 217: ...Detection Error is detected from pressure detected by high pressure sensor Error Decision Conditions When the sensor is short circuit or open circuit more than 4 22MPa or less than 0 01MPa Supposed Causes Defective high pressure sensor Connection of low pressure sensor with wrong connection Defective outdoor unit PCB Defective connection of high pressure sensor ...

Page 218: ... Replace the outdoor unit main PCB or sub PCB YES Replace the high pressure sensor Are the characteristics of the high pressure sensor normal Make a comparison between the voltage characteristics 1 and the gauge pressure NO YES Replace the outdoor unit main PCB or sub PCB Is the PCB pressure detection normal Make a comparison between the checker pressure data and the voltage characteristics 2 NO Y...

Page 219: ...cted from pressure detected by low pressure sensor Error Decision Conditions When the sensor is short circuit or open circuit more than 1 77MPa or less than 0 01MPa Supposed Causes Defective low pressure sensor Connection of high pressure sensor with wrong connection Defective outdoor unit PCB Defective connection of low pressure sensor Mismatched connection with piping ...

Page 220: ...r normal NO Replace the outdoor unit main PCB or sub PCB YES Replace the low pressure sensor Are the characteristics of the low pressure sensor normal Make a comparison between the voltage characteristics 1 and the gauge pressure NO YES Replace the outdoor unit main PCB or sub PCB Is the PCB pressure detection normal Make a comparison between the checker pressure data and the voltage characteristi...

Page 221: ...nector and operate unit again NO YES Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Check the current sensor corresponding to the error code J2 in the monitor mode YES Is the connector connection for current sensor normal Correct the connections between the current sensors and the STD compressors YES Are the current sensors invers...

Page 222: ...J9 Applicable Models LRYEQ16AY1 Method of Error Detection Error is detected from the temperature by each thermistor Error Decision Conditions When a thermistor disconnection or short circuit occurs during operation Supposed Causes Defective connection of thermistor Defective thermistor Defective outdoor unit PCB ...

Page 223: ...changer outlet thermistor R6T J9 Plate type heat exchanger outlet thermistor R4T There are multiple corresponding thermistors Use the outdoor unit PCB monitor mode to check which thermistor is affected Check the connector connection 1 Disconnect the thermistor from the outdoor unit PCB and use a tester to measure the resistance value YES Replace the thermistor Is the resistance normal NO Is the er...

Page 224: ...it failure Troubleshooting Refer to P 291 Turn OFF the power supply once and then turn ON the power supply again Does the power supply normally restart Check if the power transistor is normal Check if the power transistor of the fan driver is normal Check if insulation resistance of the compressor is 100kΩ or more CHECK 4 CHECK 4 NO YES Replace the compressor inverter PCB A4P NO Replace the compre...

Page 225: ...he compressor inverter PCB YES Continue the operation z It is supposed that the radiation fin temperature became high due to some field factors In this connection check the following points Stained radiation fin Airflow obstructed with dirt or foreign matters Damage to fan impellers Too high outdoor air temperature NO Caution Be sure to turn off the power switch before connecting or disconnecting ...

Page 226: ...n Check if the compressor lead wires are normal Check if the wiring and connection to the compressor are normal Insulation resistance of the compressor is 100 kΩ or less Compressor coils are disconnected Failure occurs again after restarting the unit Failure occurs again after restarting the unit YES YES YES YES YES NO NO Check if the power transistor is normal Open the stop valve NO Replace compr...

Page 227: ...Error Detection Error is detected from the current flowing in the power transistor Error Decision Conditions When inverter secondary current is below 1 19 0A or more continues for 5 seconds 2 16 1A or more continues for 260 seconds Supposed Causes Compressor overload Compressor coil disconnected Defective inverter PCB Disconnection wire of compressor ...

Page 228: ...ssure difference between high pressure and low pressure before restarting is 0 2MPa or less Error code L8 is displayed again YES YES YES YES YES NO NO Check if the power transistor is normal Open the stop valve NO Replace the compressor lead wires NO Correct the wiring and connection Replace the inverter compressor Replace the inverter compressor NO Replace the compressor inverter PCB A4P NO Defec...

Page 229: ...of Error Detection Detect the failure based on the signal waveform of the compressor Error Decision Conditions Starting the compressor does not complete Supposed Causes Failure to open the stop valve Defective compressor Wiring connection error to the compressor Large pressure difference before starting the compressor Defective inverter PCB ...

Page 230: ...it is the first time to start after installation Is the individual system applied to the outdoor unit Correct the wiring then supply the power to restart NO NO YES Charge a right amount of refrigerant Check if a right amount of refrigerant is charged NO YES Cancel the melting state of refrigerant Check if the insulation resistance of the compressor is more than 100kΩ NO YES Fix the compressor lead...

Page 231: ...he compressor refrigerant circuit NO YES Continued from the previous page Start failure due to aged operation YES Replace the inverter compressor Check if the insulation resistance of the compressor is 100kΩ or more NO YES Replace the compressor inverter PCB A4P Check if the power transistor is normal NO Replace the inverter compressor Broken inside the compressor YES NO CHECK 4 CHECK 4 ...

Page 232: ...tween inverter PCB and outdoor unit main PCB by micro computer Error Decision Conditions When the correct communication is not conducted in certain period Supposed Causes Defective connection between the inverter PCB and outdoor unit main PCB Defective outdoor unit main PCB transmission section Defective inverter PCB Defective noise filter External factor noise etc Defective inverter compressor De...

Page 233: ...re connecting or disconnecting connectors or parts may be damaged YES Replace the INV compressor M1C The INV compressor has insulation resistance of not more than 100kΩ YES NO Not the LC error Check the error code again The micro computer normal monitor green of the outdoor unit main PCB A1P is blinking NO YES Replace the compressor inverter PCB A4P Has the compressor inverter PCB A4P caused damag...

Page 234: ...cting connectors or parts may be damaged NO Part or wiring defect After turning the power supply OFF check and repair the main circuit wiring or parts 1 Loose or disconnected wiring between power supply and inverter 2 K1M contact disposition fusion or contact is poor 3 Loose or disconnected noise filter Is the voltage imbalance applied to the inverter in excess of 6 V 2 YES When voltage monitoring...

Page 235: ...tion button Supposed Causes Defective radiator fin temperature thermistor Defective inverter PCB Defective inverter compressor Defective fan motor Troubleshooting Replace the inverter PCB Is the thermistor resistance value normal Continue operation NO NO Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Measure resistance value of th...

Page 236: ...acing outdoor unit main PCB Troubleshooting 1 PC0509 2 2 PC0511 12 Is the type of the compressor inverter PCB A4P correct 1 Is the type of the fan inverter PCB A5P A9P correct 2 Does the preparation indication lamp H2P on the outdoor unit main PCB turn OFF Is the setting of DIP switches when replace the outdoor unit main PCB correct Replace it with the correct compressor inverter PCB NO Replace it...

Page 237: ...es Power supply reverse phase T phase open phase Defective outdoor unit PCB Troubleshooting Fix the open phase Requires inspection of field power supply section There is an open phase at the power supply T phase terminal section X1M of the outdoor unit Replace the outdoor unit PCB A1P YES Reverse phase Counter measure of the problem is completed by phase replacement Operation is normal if one plac...

Page 238: ...uit wiring Defective fan motor Defective connection of signal cable Troubleshooting There are problems on the condition of power supply described above The insulation resistance of compressor is not more 100kΩ The insulation resistance of fan motor is not more 1MΩ Check the condition of the power supply Check if power supply voltage is 200V 10 Check if there is open phase or defective wiring Check...

Page 239: ...A4P If the inverter PCB is badly damaged recheck the compressor YES Check the harness YES Continue the operation Causes Instantaneous power failure open phase noises or else NO CHECK 4 Has the inverter PCB caused damage Remove and insert the connectors shown below X4A A4P X20A A1P X6A A4P X28A A1P NO YES Is the power transistor normal Replace the inverter PCB A4P NO Replace the inverter PCB A4P If...

Page 240: ... between indoor unit and outdoor unit is correctly executed using micro computer Error Decision Conditions When transmission is not carried out normally for a certain amount of time Supposed Causes Indoor to outdoor outdoor to outdoor transmission wiring F1 F2 disconnection short circuit or wrong wiring Outdoor unit power supply is OFF System address does not match Defective outdoor unit PCB A1P D...

Page 241: ...the outdoor unit main PCB of the outdoor unit Keep pressing for 5 seconds or more NO Correct the relay wires NO Replace the outdoor unit main PCB YES Check if the normal condition monitor for the micro computer HAP on the outdoor unit PCB blinks Check if the indoor outdoor outdoor outdoor relay wires are normal Check if the operation is normal with 1 circuit after outdoor outdoor relay wires are d...

Page 242: ...transmission caused by noise Troubleshooting SS1 of both remote controllers is set to MAIN Operation returns to normal when the power is turned OFF momentarily NO YES YES NO Set one remote controller to SUB turn the power supply OFF once and then restart YES Change to 2 core wiring YES Replace the indoor unit PCB NO Caused by either a defective remote controller PCB or a defective indoor unit PCB ...

Page 243: ...b PCB DIP switch 2 1 of sub PCB are ON Troubleshooting Fix the outdoor units multi connection transmission wiring and reset power Is there any broken wire or erroneous wire connection in the communication wiring of multi outdoor unit system NO Turn DS2 1 of sub PCB A2P OFF DS2 1 of sub PCB A2P is ON YES Wiring between inside outside F1 F2 to outdoor unit main PCB A1P Wired between indoor outdoor F...

Page 244: ...sed Causes Defective transmission between main and sub remote controller Connection between sub remote controllers Defective remote controller PCB Troubleshooting Using 2 remote controllers control SS1 of both remote controllers is set to SUB SS1 of remote controller PCBs is set to MAIN NO Set SS1 to MAIN the power supply OFF once and then restart NO Turn the power OFF and then restart If a malfun...

Page 245: ...e electronic expansion valve in indoor unit of other system Defective PCB of indoor unit in other system Improper connection of transmission wiring between indoor and outdoor unit Troubleshooting All the units are indicating U9 U9 has been displayed for 2 minutes or more YES Continue operation NO Re diagnose by display after passage of 2 minutes or more NO The outdoor unit PCB indicated by the err...

Page 246: ...xcess of connected indoor units Defective outdoor unit PCB Troubleshooting The total of indoor units displaying UA and indoor units connected to the same refrigerant system is within connectable number of unit Does the error reoccur Press the RESET button of outdoor unit PCB for 5 sec YES The number of indoor units that can be connected to a single outdoor unit system is excess of allowable range ...

Page 247: ...centralized address of target indoor units is detected on another indoor unit Supposed Causes Address duplication of central remote controller Defective indoor unit PCB Troubleshooting Make setting change so that the centralized address will not be duplicated Equipment related to centralization is connected to an indoor unit Replace the indoor unit PCB YES NO Caution Be sure to turn off the power ...

Page 248: ...omputer to check whether or not normal transmission is accomplished between the indoor unit and the central remote controller Error Decision Conditions When no normal transmission is accomplished for a fixed period of time Supposed Causes Defective transmission between central remote controller and indoor unit Disconnection of connector for settings of main controller Defective PCB of central remo...

Page 249: ...any broken wires or wrong wire connections in transmission wiring with the main controller Is the connector for main control settings on the main controller disconnected Make setting of the group No properly NO NO Reset power supplies to all centralized control equipment simultaneously YES Turn power supply to indoor unit ON NO Fix the wiring properly NO Fix the wiring properly NO Connect the conn...

Page 250: ...ay not be successful if carried out after the outdoor 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 Are the stop valves opened NO Open the stop valve Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged YES Is the check operation carried...

Page 251: ...S YES Normal NO NO After fixing the incorrect wiring press and hold the RESET button on the master outdoor unit PCB for 5 seconds The unit will not run for up to 12 minutes NO Normal NO Replace the indoor unit PCB Replace the outdoor unit PCB YES YES Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Is electricity being introduce for...

Page 252: ...case and booster unit are not normal Supposed Causes Defective outdoor unit PCB A1P Defective connection of inside outside relay wires Troubleshooting LED Indications First digit l h k h h l l Second digit l k h h h h l Turn OFF the power once and turn ON again Return to normal Check if inside outside relay wires is disconnected External factor other than error for example noise etc YES Connect th...

Page 253: ...e and Y1E Power failure during operation Prolonged power shut down Within 10 seconds after the power is turned ON Troubleshooting LED Indications First digit l h k h h l l Second digit l k h h h l h More than 10 seconds passed since power ON Shut OFF power Remove the compressor lead wire Defective insulation on compressor Defective insulation on entire product Reset the power with the operation sw...

Page 254: ...actuated Operating pressure 2 2MPa Reset pressure 1 85MPa Supposed Causes Insufficient service space Suction air temperature of booster unit is 43 C or more Defective high pressure switch Wire broken in high pressure switch harness Defective connection of high pressure switch connector Obstacles at the air inlet Defective outdoor unit fan Refrigerant overcharged Stop valve is not opened Defective ...

Page 255: ...e stop valve open Is the high pressure switch connector properly connected to the outdoor unit main PCB Is there continuity in the high pressure switch High pressure level is abnormally high Error code H3 is displayed YES YES YES YES Open the stop valve NO Connect correctly NO Replace the high pressure switch having no continuity in it NO Remedy the high pressure NO Replace the high pressure switc...

Page 256: ...is dropped under compressor operation Supposed Causes Abnormal drop of low pressure Defective low pressure sensor Defective outdoor unit PCB Stop valve is not opened Refrigerant shortage Moisture choke Clogging of electronic expansion valve Dirty filter in showcase Dirty filter in booster unit Defective of defrost in showcase LED Indications First digit l h k h h l l Second digit l k h h l h h Ope...

Page 257: ...he outdoor unit main PCB A1P NO Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged YES YES YES 1 Mount a pressure gauge on the low pressure service port 2 Reset the operation and then restart the operation Service Checker Connect the service checker to compare the low pressure value and the actual measurement value by pressure sensor ...

Page 258: ...his error will be output when the inverter compressor motor does not start up even in forced startup mode Supposed Causes Inverter compressor lock High differential pressure 0 5MPa or more Incorrect UVW wiring Stop valve is not opened Slugging state of refrigerant Leakage of electronic expansion valve defective electronic expansion valve in showcase and leakage of liquid solenoid valve Too frequen...

Page 259: ... differential pressure more than 0 5 MPa U W V Power OFF Power ON Onsite causes Open the stop valve NO Replace the relay wires and ensure right connection of the connector NO Ensure correct connection NO Conclude the work There is a possibility of defective pressure equalizing Check the refrigerant circuit Defective pressure equalizing Check the refrigerant circuit NO Ensure correct connection NO ...

Page 260: ...nce between the connector pins and then make sure the resistance falls in the range of 40 to 50Ω LED Indications First digit l h k h h l l Second digit l k h l h h l External factor other than error for example noise etc YES Ensure correct connection NO Replace the electronic expansion valve coil NO Replace the PCB A1P YES Caution Be sure to turn off the power switch before connecting or disconnec...

Page 261: ...or and the value based on the surface thermometer Refer to P 290 LED Indications First digit l h k h l h l Second digit l k h h h l l OR 120 C or more 110 C or more 15 sec 120 C or more 90 sec Check if discharge pipe thermistor property is normal 1 Replace the discharge pipe thermistor NO Replace the PCB A1P NO Caution Be sure to turn off the power switch before connecting or disconnecting connect...

Page 262: ...igh pressure switch Defective PCB Broken wire in lead wire Troubleshooting LED Indications First digit l h k h l h h Second digit l k h h h l l Replace the lead wire NO Replace the high pressure switch having no continuity in it Normal resistance Not more than 10Ω NO Properly connect it NO Replace the PCB YES Caution Be sure to turn off the power switch before connecting or disconnecting connector...

Page 263: ...J3 J8 J9 First digit l lhhl lhl lhh l lh l lhhl lh Second digit lkhhh l l lkhlhhh lkh lhh l Error code Corresponding thermistor LCBKQ3AV1 Electric symbol Connector J3 Discharge pipe thermistor R2T X12A J8 Double tube heat exchanger inlet thermistor R3T J9 Double tube heat exchanger outlet thermistor R5T Check the connector connection 1 Disconnect the thermistor from the outdoor unit PCB and use a ...

Page 264: ...e sensor Error Decision Conditions When the low pressure sensor is short circuit or open circuit Not less than 1 8MPa or 0 5MPa and below Supposed Causes Defective low pressure sensor Connection of high pressure sensor with wrong connection Defective outdoor unit PCB Defective connection of low pressure sensor Piping with wrong connection LED Indications First digit l l h h l l h Second digit l k ...

Page 265: ...e the low pressure sensor Are the characteristics of the low pressure sensor normal Make a comparison between the voltage characteristics 1 and the gauge pressure NO YES NO Replace the outdoor unit main PCB If the PCB pressure detection normal Make a comparison between the checker pressure data and the voltage characteristics 1 NO YES Caution Be sure to turn off the power switch before connecting ...

Page 266: ...B A1P z IPM 1 failure z Current sensor failure z Defective IGBT or drive circuit Troubleshooting Note 1 IPM IPM is a semiconductor device for electric power incorporating the drive circuit and self protection feature of the power device which controls electric power LED Indications First digit l h k h l l l Second digit l k h h h h l Turn OFF the power supply once and then turn ON the power supply...

Page 267: ...l h k h l l l Second digit l k h h l h h Defective radiation from the power unit Blocked air suction port Stained radiation fin High outdoor air temperature YES Replace the PCB NO Replace the inverter PCB YES Continue the operation z It is supposed that the radiation fin temperature became high due to some field factors In this connection check the following points Stained radiation fin Airflow ob...

Page 268: ...ansistor Error Decision Conditions When an excessive current 36 9A flows in the power transistor Supposed Causes Defective compressor coil Broken wire or insulation failure Compressor startup failure mechanical lock Defective inverter PCB Large differential pressure when compressor startup 0 5 MPa or more Instantaneous fluctuations in power supply voltage LED Indications First digit l h k h l l l ...

Page 269: ...ure occurs again after restarting the unit Failure occurs again after restarting the unit YES YES YES YES YES NO NO Check if the power transistor is normal Open the stop valve NO Replace compressor lead wires NO Correct the wiring and connection Replace the inverter compressor Replace the inverter compressor NO Replace the inverter PCB NO Continue the operation Momentary power failure is possible ...

Page 270: ...he power transistor Error Decision Conditions When inverter secondary current is below Detected value 14 8 A X 260 sec Supposed Causes Stop valve is not opened Compressor overload Broken wire in compressor coil Disconnection of compressor wiring Defective inverter PCB High temperature in showcase Defective electronic expansion valve in showcase LED Indications First digit l h k h l l l Second digi...

Page 271: ...e pressure difference between high pressure and low pressure before restarting is 0 2MPa or less Error code L8 is displayed again YES YES YES YES YES NO NO Check if the power transistor is normal Open the stop valve NO Replace the compressor lead wires NO Correct the wiring and connection Replace the inverter compressor Replace the inverter compressor NO Replace the inverter PCB A2P NO Defective p...

Page 272: ...ssor Error Decision Conditions Starting the compressor does not complete Supposed Causes Stop valve is not opened Defective compressor Erroneous wire connections to compressor Large differential pressure prior to compressor startup 0 5 MPa or more Defective inverter PCB Slugging of refrigerant Too frequent ON OFF operation due to insufficient loading LED Indications First digit l h k h l l l Secon...

Page 273: ... is charged NO YES Cancel the melting state of refrigerant Check if the insulation resistance of the compressor is more than 100kΩ NO YES Fix the compressor lead wire Check if the compressor lead wires are disconnected YES Open the stop valve Check if the stop valve is open NO YES Cancel the melting state of refrigerant Refrigerant is melting The unit is out of power supply for more than 6 hours Y...

Page 274: ...ch before connecting or disconnecting connectors or parts may be damaged Continued from the previous page Start failure due to aged operation YES Replace the inverter compressor Check if the insulation resistance of the compressor is 100kΩ or more NO YES Replace the compressor inverter PCB Check if the power transistor is normal NO Replace the inverter compressor Broken inside the compressor YES N...

Page 275: ...on section External factor noise etc Defective fan motor Troubleshooting LED Indications First digit l h k h l l l Second digit l k h l l h h Is the connector for the fan motor connected to the outdoor unit main PCB Remove the connector for fan motor and the operate The distance is 50mm or more Check the distance between the strong electric line and weak electric line onsite setting Keep the dista...

Page 276: ...sconnecting connectors or parts may be damaged NO Part or wiring defect After turning the power supply OFF check and repair the main circuit wiring or parts 1 Loose or disconnected wiring between power supply and inverter 2 K1M contact disposition fusion or contact is poor 3 Loose or disconnected noise filter Is the voltage imbalance applied to the inverter in excess of 6 V 2 YES When voltage moni...

Page 277: ...ve radiator fin temperature thermistor Defective inverter PCB Defective inverter compressor Defective fan motor Troubleshooting LED Indications First digit l h k l h h h Second digit l k h h l h h Replace the inverter PCB Is the thermistor resistance value normal Continue operation NO NO Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be dama...

Page 278: ...ther or not the type of the inverter PCB is correct Supposed Causes Wrong matching of type of PCB Troubleshooting LED Indications First digit l h k l h h h Second digit l k h l l h l Replace the outdoor unit main PCB YES Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Replace it with the correct compressor inverter PCB Is the type ...

Page 279: ...n valve and filter in showcase Leakage of refrigerant Improper torque of stop valve cover Moisture choke Troubleshooting LED Indications First digit l h k l h h l Second digit l k h h h h h OR Td 120 C Td 110 C continues for 15 sec Td 105 C continues for 90 sec Check the clogging of refrigerant system YES Caution Be sure to turn off the power switch before connecting or disconnecting connectors or...

Page 280: ... inverter and power supply voltage Error Decision Conditions When the voltage aforementioned is less than 170V When the voltage aforementioned is less than 440V Supposed Causes Power supply insufficient Instantaneous power failure Open phase Defective PCB Defective compressor Defective main circuit wiring Defective fan motor Defective connection of signal cable LED Indications First digit l h k l ...

Page 281: ...rn ON the power supply and start operation NO NO NO NO NO YES Is the power transistor normal Correct the fault YES Replace the compressor YES Replace the inverter PCB NO Replace the fan motor If the fan motor is badly damaged replace the inverter PCB YES Replace the noise filter PCB Defective noise filter YES The U2 error recurs Check the harness YES Stop standby when the compressor starts up Repl...

Page 282: ...ster unit is correctly executed using micro computer Error Decision Conditions When transmission is not carried out normally for a certain amount of time Supposed Causes Indoor to outdoor outdoor to outdoor transmission wiring F1 F2 disconnection short circuit or wrong wiring Outdoor unit power supply is OFF System address does not match Defective outdoor unit PCB LED Indications First digit l h k...

Page 283: ...the booster unit PCB blink The fuse on the booster unit PCB is blown Lights do not go out for 10 minutes or more Check if the indoor outdoor outdoor outdoor relay wires are normal Replace the booster unit main PCB NO NO NO Replace the indoor unit PCB YES YES Press the RESET button on the main PCB of the outdoor unit Keep pressing for 5 seconds or more YES Press the RESET button on the main PCB of ...

Page 284: ...tdoor outdoor units Failure to execute check operation Defective booster unit PCB Stop valve is not opened Troubleshooting LED Indications First digit l h k l h h l Second digit l k h l l l l Is indoor outdoor and outdoor outdoor unit transmission wiring normal Is the RESET button pressed for 5 seconds YES Replace the indoor unit PCB NO After fixing the incorrect wiring press and hold the RESET bu...

Page 285: ...d digit l k h l h l l NO YES YES YES Normal NO NO After fixing the incorrect wiring press and hold the RESET button on the master outdoor unit PCB for 5 seconds The unit will not run for up to 12 minutes NO Normal NO Replace the booster unit PCB Replace the outdoor unit PCB YES YES Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Is...

Page 286: ...tion normal Are the electrical characteristics normal Are the coil resistance and insulation normal Are the electrical characteristics normal Is the suction air temperature not more than 43 C Is the outdoor air temperature not more than 43 C Is the suction air temperature not more than 27 C Is the indoor temperature not more than 27 C Is the outdoor air temperature not more than 16 CWB Is the heat...

Page 287: ...than 20 C Eliminate moisture by vacuum operation Is the heat exchanger clogged Does the piping length fall in the permissible range Conduct visual checks for pipe conditions Check to be sure the stop valve is open Is there any temperature difference caused before and after the filter or branch pipe Check for the thermistor resistance and connection Check for the thermistor resistance and connectio...

Page 288: ...scuss with the showcase manufacturer Does the piping length fall in the permissible range Conduct visual checks for pipe conditions Check to be sure the stop valve is open Can the fan motor be rotated with hands Are the motor coil resistance and insulation normal Is the air filter clogged Is there any obstacle in the air passage Is the defrost setup correct Is the orientation of the solenoid valve...

Page 289: ...it electronic expansion valve failure In cooling mode If the indoor unit electronic expansion valve is excessively throttled 2 Defective superheated degree control In heading mode If the outdoor unit electronic expansion valve is excessively throttled 3 Outdoor unit electronic expansion valve failure Large resistance of piping Defective thermistor for indoor unit gas pipe Defective thermistor for ...

Page 290: ...orresponds to the actual measurement value of the sensor Defective discharge pipe temperature control Temperature increase of discharge pipe for refrigeration Defective electronic expansion valve control Y3E Y4E Subcooling electronic expansion valve failure Control failure Defective of four way valve operation Superheat due to shaft damage Superheat due to defective compressor Compressor overheat ...

Page 291: ...are normal Check if the voltage property is normal Check if the connector is connected properly Check if the thermistor resistance property is normal Check if the pressure value given by the service checker corresponding to actual measurement value by the sensor Is the temperature difference between the inlet and outlet of the evaporator appropriate Is the fitting position of the thermosensing tub...

Page 292: ... W N3 N3 N3 U V W 1 2 3 4 5 6 7 8 9 10 11 12 P2 P2 P2 U V W U V W N3 N3 N3 PCB and Circuit Diagram 1 Power OFF 2 Remove all the wiring connected to the PCB where power transistors are mounted on To use analog tester Measurement in the resistance value mode in the range of multiplying 1kΩ Due to condenser charge and so on resistance measurement may require some time 15kΩ and above including To use ...

Page 293: ...power supply 2 Measure the resistance between Vcc and each phase of U V W and GND and each phase at the motor side connectors 5 core wire to check that the values are balanced within the range of 20 while connector or relay connector is disconnected Furthermore to use a multiple meter for measurement connect the probe of negative pole to Vcc and that of positive pole to GND CHECK 11 Red U Measure ...

Page 294: ...53 4 53 71 4 5 52 38 54 6 65 54 5 6 53 5 51 09 5 5 49 83 55 6 41 55 5 6 53 6 48 61 6 5 47 42 56 6 18 56 5 6 06 7 46 26 7 5 45 14 57 5 95 57 5 5 84 8 44 05 8 5 42 98 58 5 74 58 5 5 43 9 41 95 9 5 40 94 59 5 14 59 5 5 05 10 39 96 10 5 39 01 60 4 96 60 5 4 87 11 38 08 11 5 37 18 61 4 79 61 5 4 70 12 36 30 12 5 35 45 62 4 62 62 5 4 54 13 34 62 13 5 33 81 63 4 46 63 5 4 38 14 33 02 14 5 32 25 64 4 30 6...

Page 295: ...2 78 72 5 32 23 122 7 06 122 5 6 97 23 218 24 23 5 213 51 73 31 69 73 5 31 15 123 6 87 123 5 6 78 24 208 90 24 5 204 39 74 30 63 74 5 30 12 124 6 69 124 5 6 59 25 200 00 25 5 195 71 75 29 61 75 5 29 12 125 6 51 125 5 6 42 26 191 53 26 5 187 44 76 28 64 76 5 28 16 126 6 33 126 5 6 25 27 183 46 27 5 179 57 77 27 69 77 5 27 24 127 6 16 127 5 6 08 28 175 77 28 5 172 06 78 26 79 78 5 26 35 128 6 00 128...

Page 296: ...ENI PACK Pressure Sensor CHECK 14 High Pressure PH Low Pressure PL PH 1 38VH 0 69 PL 0 57VL 0 28 PH High pressure MPa PL Low pressure MPa VH Output Voltage High Side VDC VL Output Voltage Low Side VDC Output Voltage VH VL Detected Pressure ...

Page 297: ... remote control ON OFF OFF ON 0 1 Outdoor_unit_driving Outdoor operating condition OFF ON 0 1 Thermostat_ON_ref_side_unit Refrigeration side thermostat ON conditions Run stop 1 0 Thermostat_ON_AC_side_unit Air conditioning side thermostat ON conditions Run stop 1 0 Remote_controller_temperature_ control Remote controlled temperature control cooling 1 heating 2 fan 0 Temperature_control_mode Temper...

Page 298: ...ion time in heating mode HP_heat_gard Guard timer for turning the four way valve B OFF 0 1 Turning the four way valve OFF is prohibited Electric wiring diagram Sh1 Suction SH refrigeration side Ta R1T Outdoor air temperature thermistor Sh2 Suction SH air conditioning side Td1 R31T Discharge thermistor INV Tdsh1 Discharge SH INV Td2 R32T Discharge thermistor STD1 Tdsh2 Discharge SH STD 1 Td3 R33T D...

Page 299: ...etry count F3_NON2 STD 2 discharge gas temperature retry count F4_Hp High pressure protection retry count F5_Lp1 Refrigeration side low pressure protection retry count F5_Lp2 Air conditioning side low pressure protection retry count F7_OC1 STD 1 OC retry count F8_OC2 STD 2 OC retry count F9_DCLock INV _E5 lock retry count F10_Start_failure INV _L9 start up failure position inconsistency retry coun...

Page 300: ... below record the values 0 to 9 beside bit 5 The below screen is the outdoor ram monitor model screen 2 Close all ram monitors currently open During_cleaning When the outdoor unit is receiving indoor cleaning request 0 1 Indoor_unit_cleaning_demand Cleaning request from the indoor unit 0 1 Indoor_unit_During_cleaning During cleaning of the indoor unit 0 1 Total_Amp Total current value of the outdo...

Page 301: ...rmation you wish to observe and double click on this file Once the below screen appears select Browse and select program S then click OK 4 Next the below left screen will appear Select the Word Pad program that is able to edit the debug file then click OK After you have clicked OK the below right screen will output ...

Page 302: ... the figure below Once this screen appears in the section that is surrounded by a dotted line add after _s all the values recorded in step 1 Once this is completed save and close the file If the value recorded in step 1 is 0 then no change is required Please make sure you do NOT make any changes outside the section that is surrounded by the dotted line ...

Page 303: ...aving the debug file bring up the ram monitor again then click Modify in the edited debug file as shown in the figure below left Once clicked the screen shown below right appears Change the file type to all Select the saved debug file and click Open O to open the ram monitor Change all from _s to _s 3 ...

Page 304: ...the booster s Y1E display 0 to 240 Pls Y2E 2 Degree of opening in the booster s Y2E display 0 to 240 Pls Td1 Booster discharge pipe temperature Tl Booster double pipe heat exchanger inlet temperature Tg Booster double pipe heat exchanger outlet temperature Teg Booster evaporating temperature Target LP Booster target evaporating temperature equivalent pressure INV frequency 3 times INV rps display ...

Page 305: ...ity current of indoor thermostats that are ON MaxR3T Maximum indoor unit gas pipe temperature MinR2T Minimum indoor unit liquid pipe temperature Min_set_temperature Tr Minimum set temperature suction air temperature IndoorR1T1mMax Maximum value of indoor unit suction air temperature over 1 minute Indoor_unit_R1T Indoor unit suction air temperature thermistor Indoor_unit_R2T Indoor unit liquid temp...

Page 306: ...or unit Error Code Ram monitor display Error code Ram monitor display Error Code Ram monitor display E0 30 H4 44 L5 75 E1 31 H7 47 L8 78 E2 32 H9 49 L9 79 E3 33 J0 60 LC 7C E4 34 J1 61 P1 81 E5 35 J2 62 P4 84 E7 37 J3 63 PJ 8D E9 39 J4 64 U1 91 EC 3C J5 65 U2 92 EE 3E J6 66 U4 94 EH 3B J8 68 U7 97 EJ 3D J9 69 U9 99 F3 53 JA 6A UA 9A F4 54 JC 6C UF 9F F5 55 L1 71 UH 9B H0 40 L4 74 H3 43 ...

Page 307: ...STD1 INV or STD1 or STD2 E3 High pressure High pressure protection control HPT or HPS1 operation INV HPS1 operation INV or HPS2 operation STD1 HPS3 operation STD2 E4 Low pressure Refrigeration side Air conditioning side H3 HPS failure HPS1 operation INV or HPS2 operation STD1 HPS3 operation STD2 E9 EV error Y1E Y2E Y3E Y4E Y5E E7 Fan lock Fan 1 Fan 2 H7 Fan position misaligned Fan 1 Fan 2 JC Refri...

Page 308: ... Mode_complete Flag for the completion of mode change over incomplete complete 0 1 Bu_thermostat_ON Bu thermostat condition ON OFF 1 0 outdoor_unit_thermostat_ON Outdoor thermostat condition transmitted from the outside Comp condition ON OFF 1 0 Bu_driving_permission Displaying the Bu operating permission transmitted from the outside 0 1 LP1 outdoor_unit Low pressure sensor value of the outdoor un...

Page 309: ... speed display Lpm Target evaporating temperature equivalent saturation pressure total_Amp Overall current TgSH Discharge SH InvHz Inverter frequency Inv_1_Amp Inverter primary current Inv_2_Amp Inverter secondary current Error_code Refer to 1 on next page oil_collect_Hz_up Capacity control Signal that forces the increased frequency in oil collection conditions F1 INV discharge gas temperature ret...

Page 310: ... screen 1 Error code displays on the booster unit ram monitor the outdoor unit ram monitor Booster unit Error code Ram monitor display Error code Ram monitor display E1 31 L1 71 E3 33 L4 74 E4 34 L5 75 E5 35 L8 78 E7 37 L9 79 E9 39 LC 7C F3 53 P1 81 H3 43 P4 84 J3 63 U2 92 J8 68 U4 94 J9 69 JC 6C ...

Page 311: ... the oil level decreasing and stop charging just before the oil runs out Evacuate the air after the oil charging is completed Make connections for additional refrigerant charging as shown in the Figure below Evacuate the air between the connecting piping of the outdoor unit and valve C to eliminate any remaining air between the refrigerant tank and valves A and B Open valve B and charge the refrig...

Page 312: ...evacuation via service ports b c and d and maintenance valves A and B At this time if the addition of oil is required fill oil using port a 7 While leaving the operation SW OFF turn the power to the outdoor unit ON Next turn the operation switch of the outdoor unit ON If using a remote switch turn to remote Turn the booster unit power ON then turn the booster operation switch ON If using a remote ...

Page 313: ... pipelines refer to maintenance 7 5 Conduct air tight test 6 Conduct evacuation via service ports b c and d and maintenance valves A B and C2 At this time if the addition of oil is required fill oil using port a If the refrigerant was recovered in liquid form filling of additional refrigerant oil of 5 of the recovery volume is required 7 Place as much refrigerant as can be filled through maintenan...

Page 314: ...alve G and booster discharge maintenance valve F 7 Fill as much refrigerant as possible from maintenance valve G If the booster compressor has been replaced 0 5L of refrigerant oil must be added using the charging cylinder Furthermore if the refrigerant was recovered in liquid form filling of additional refrigerant oil of 5 of the recovery volume is required However if the subject components are Y...

Page 315: ...site liquid pipelines refer to maintenance 7 6 Conduct air tight test 7 Conduct evacuation via stop valve D and H if there is no valve H via C1 8 Fill as much refrigerant as possible from maintenance valve H After evacuation is complete add refrigerant and refrigerant oil using the charging cylinder from H if there is no H from C1 If the refrigerant was recovered in liquid form filling of addition...

Page 316: ...ation via stop valves C2 and E 8 Fill as much refrigerant as possible from C2 There is a possibility that indoor electronic expansion valves are open 9 Turn the outdoor unit and booster unit operation switches OFF Turn the outdoor unit and booster unit power OFF and turn the outdoor unit main DIP switch 2 7 OFF as well 10 Turn the outdoor unit power indoor air conditioner and booster unit power ON...

Page 317: ...se power OFF 2 Recover refrigerant from stop valves A B C1 C2 D and E framed portion Be particularly careful to ensure you do not forget to recover refrigerant from stop valve A and B This is as refrigerant recovery from within the outdoor compressor cannot be conducted if refrigerant is only recovered from C1 and C2 3 Replace the outdoor unit Also replace the dryer at the same time Subject compon...

Page 318: ...nt from the refrigeration side liquid pipe portion 3 Recover refrigerant from stop valve C1 framed portion 4 Conduct air tight test 5 Conduct evacuation via stop valve C1 6 Fill as much refrigerant as possible from C1 7 After evacuation is complete open stop valves C1 D1 if there is a valve H D1 will already be open and H only if H is present 8 Turn the outdoor unit power ON and turn the outdoor u...

Page 319: ...n valve Capillary tube External equalizer pipe Feeler bulb Low pressure liquid refrigerant Evaporator Diaphragm Evaporating pressure To evaporator Refrigerant inlet Condenser P1 P2 P3 Main unit of expansion valve Spring pressure High pressure liquid refrigerant Internal pressure of feeler bulb Diaphragm Evaporating pressure To evaporator Refrigerant inlet This expansion valve introduces the evapor...

Page 320: ...the liquid refrigerant are all vaporized around this area The liquid refrigerant makes up the major portion of the pipe If no feeler bulb is connected left in the air The internal pressure of the feeler bulb will remain high The pressure P1 will remain in a high level thus keeping the valve fully open If the feeler bulb is not mounted in a proper position The feeler valve will be unable to follow ...

Page 321: ...gerant flows thus disabling the feeler bulb to sense accurate temperatures 2 Shape of suction pipe and mounting position of feeler bulb 45º Feeler bulb Suction pipe diameter of φ 22 2 mm or less Suction pipe diameter of φ 25 4 mm or more Feeler bulb Feeler bulb Suction pipe If no appropriate horizontal pipes are available place the feeler bulb with the front end downward and the capillary connecti...

Page 322: ...eler bulb the expansion valve properly operates Showing the case where no trap part is provided and no liquid and oil dwells in the mounting position of the feeler bulb External equalizer pipe Evaporator Short circuit Improper mounting of feeler bulb Proper mounting of feeler bulb If the evaporator has 2 or more paths and the feeler bulb is mounted improperly the valve will only sense part of the ...

Page 323: ...ence on the other feeler expansion valve Mount the feeler bulb and external equalizer pipe as shown in figure on the left Make this distance as short as possible Main suction pipe Make this distance as short as possible External equalizer pipe Feeler bulb Suction pipe Compressor If the equalizer pipe is connected too close to the feeler bulb the expansion valve will be affected with the temperatur...

Page 324: ...quirements for insulating materials Small heat capacity of insulating materials own Low thermal conductivity No water absorption properties Heat resistance provided particularly heat pump unit Specific insulating materials Use Toraypef PP or equal as the insulating materials for the feeler bulb of electronic expansion valve Cautions in connecting the external equalizer pipe If this pipe is connect...

Page 325: ...rive element e g diaphragm External equalizer type A feeler expansion valve which serves as the connection of piping from a control point branched in the evaporator outlet circuit to the pressure sensing side of a control element 2 Equilibrium of internal equalizer type Evaporator Feeler bulb Evaporator outlet External equalizer pipe Feeler bulb Evaporator Evaporator outlet External equalizer pipe...

Page 326: ...mperature of feeler bulb must be equivalent to 0 09 0 4 0 49MPa that is 5 C To raise the pressure equivalent saturation temperature at the Point C from 5 C to 5 C Point B end point of evaporation must be set further upstream side thus bringing the superheated degree to 10 C and reducing the effectively usable area of the evaporator Pressure of feeler bulb PB 0 41MPa Diaphragm Evaporating pressure ...

Page 327: ... diaphragm thus resulting in a failure 3 Be sure to use T joints in order to braze the equalizer pipe and suction pipe The reason is that the unit is of KHK compatible model 4 Take measures so as not to transfer heat to the feeler bulb and capillary part while in brazing work or else Internal equalizer type Proper position UP DOWN Outlet Inlet External equalizer type External equalizer pipe mounti...

Page 328: ... on the subcooling ratio Calculated example The subcooling ratio with evaporative temperature at 10 C and condensing temperature at 45 C becoming 19K liquid refrigerant temperature at 26 C The liquid temperature in the booster unit is further decreased The liquid temperature of the refrigeration showcase inlet is approximately 10 degrees of the target evaporating temperature of the outdoor unit Su...

Page 329: ...eration command Thermo signal To a refrigeration showcase From a refrigeration showcase Booster unit Booster unit Outdoor unit Booster unit Booster unit Outdoor unit Precaution for field wiring in case 2 booster units are operated with 1 relay for freezing operation command Thermo signal Freezing operation command relay Thermo signal If no voltage contacts used for freezing operation command are t...

Page 330: ...A freezer showcase A freezer showcase Outdoor unit Booster unit Booster unit T joint Main pipe 2 Discharge pipe C3 1 Discharge pipe To Outdoor unit Discharge pipe C1 Discharge pipe C2 Discharge pipe C3 3 Suction pipe temp less than 30K SH10K or more Suction pipe temp less than 30K SH10K or more Suction pipe temp less than 20 C in case full load operation SH10K all or more Please connect the connec...

Page 331: ...itioner With the operation switch turned OFF holding the RESET button will result in recognition of indoor unit and boosters with power ON and will allow operation in emergencies However if the indoor unit s power is OFF there is a chance of the expansion valve being open which can lead to damage of the compressor so please take care Also when there is not a single transmitting instrument indoor a...

Page 332: ...rated Bu Indoor Outdoor installation Inv Box Indoor use Bu Inv Box separated Pipes Number of pipes 4 pipe type 3 pipe type Gas pipe size φ25 4 2 φ28 6 2 Liquid pipe size φ9 5 2 φ15 9 Booster discharge pipe size φ9 5 φ9 5 Booster suction pipe size φ15 9 φ15 9 Booster liquid pipe size φ6 4 2 Thermal insulation of suction pipe Air conditioner mm 20 20 Refrigerator mm 30 30 Freezer mm 50 50 Thermal in...

Page 333: ...ble target temperature Tc in heating Yes No Outdoor air temperature shift of target temperature Tc in heating Yes No Low noise operation mode Outdoor air 27 C 32 C 2ch 32 C 1ch AIRNET time Yes Yes External contacts Yes Yes Night time evaporative temperature shift AIRNET time Yes No External contacts Yes No Prohibition of heated air in remote control stopped Yes Yes Prohibition of evaporating mode ...

Page 334: ...ision History Month Year Version Revised contents 04 2010 SiBE811001 09 2012 SiBE811001_A Addition of functional improvement 11 2013 SiBE811001EB Correction from sales division and modification of details ...

Page 335: ...roduct The User s Manual provides important safety instructions and warnings Be sure to follow these instructions and warnings If you have any enquiries please contact your local importer distributor and or retailer Cautions on product corrosion 1 Air conditioners should not be installed in areas where corrosive gases such as acid gas or alkaline gas are produced 2 If the outdoor unit is to be ins...

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