Daikin RWEYQ72PTJU Service Manual Download

Page: 210 / 280

Troubleshooting by Indication on the Remote Controller

SiUS30-1301

202

Service Diagnosis

3.30 Momentary Overcurrent of Inverter Compressor

Error Code

Applicable
Models

RWEYQ72P, 84P

Method of Error
Detection

Error is detected from current flowing in the power transistor.

Error Decision
Conditions

When an excessive current flows in the power transistor
(Instantaneous overcurrent also causes activation.)

Supposed
Causes



Defective compressor coil (disconnected, defective insulation)



Compressor startup error (mechanical lock)



Defective inverter PCB

Summary of Contents for RWEYQ72PTJU

Page 1: ...Service Manual SiUS30 1301 Water Cooled Heat Pump Heat Recovery R 410A 60Hz RWEYQ72 252PTJU 9 RWEYQ72 252PYDN...

Page 2: ...ternal Appearance 10 3 1 Indoor Units 10 3 2 Air Treatment Equipment 10 3 3 Condensing Units 11 4 Combination of Condensing Units 12 5 Capacity Range 12 Part 2 Refrigerant Circuit 13 1 Refrigerant Cir...

Page 3: ...trol in Heating 48 4 3 Pressure Equalizing Control 49 5 Normal Control 50 5 1 Compressor Control 50 5 2 Electronic Expansion Valve Control 52 5 3 Heat Exchange Mode in Heating Operation or Simultaneou...

Page 4: ...g from Condensing Unit 104 3 1 Location of DIP Switch and Branch Selector Button 104 3 2 Setting by DIP Switches 105 3 3 Setting by Branch Selector Buttons 106 3 4 Setting Mode 1 107 3 5 Setting Mode...

Page 5: ...normal Discharge Pipe Temperature 190 3 27 Refrigerant Overcharged 191 3 28 Water System Abnormality 193 3 29 Thermistor System Abnormality 195 3 30 High Pressure Sensor Abnormality 196 3 31 Low Press...

Page 6: ...ant System Address Undefined 239 3 54 Check 241 Part 7 Procedure for Mounting Dismounting of Switch Box 252 1 Procedure for Mounting Dismounting of Switch Box 253 1 1 Procedure for Dismounting 253 1 2...

Page 7: ...ult in frostbite Use only pipes flare nuts tools and other materials designed specifically for R410A refrigerant systems Never use tools or materials designed for R22 refrigerant systems on an R410A r...

Page 8: ...r have become deteriorated have them replaced Damaged cable and wires could result in an electrical shock or fire Do not use a joined power cable or an extension cord or share the same power outlet wi...

Page 9: ...n 5 1 3 Energy Saving 6 1 4 Enhanced Usability 7 1 5 Condensing Unit Lineup 8 2 Model Names of Indoor Condensing Units 9 2 1 Indoor Units 9 2 2 Condensing Units 9 3 External Appearance 10 3 1 Indoor U...

Page 10: ...ion of the Sine Wave which smoothes rotation of motor operation efficiency is improved sharply Smooth sine wave DC Inverter Scrolling High thrust mechanism Water pipe less internal structure Heat exch...

Page 11: ...e for tall multistory or large buildings because the system can tolerate up to 284 2 psi water pressure Furthermore if the currently installed heat source water temperature is between 50 F and 113 F i...

Page 12: ...60 80 12 6 10 5 9 5 8 5 7 0 5 0 3 0 0 0 3 0 5 0 Refrigerant piping Water piping VRV W REFNET Joint Standard system Heat Pump type Example only Actual length up to condensing unit branch piping up to...

Page 13: ...nt control circuit has resulted in the Industry s most compact and lightweight equipment A weight of 330 lbs and height of 39 3 8 inch make installation possible in buildings with limited space or whe...

Page 14: ...sible with Heat Recovery performed between indoor units The second stage of Heat Recovery operation is within the water loop where Heat Recovery is performed between the VRV W units This 2 stage Heat...

Page 15: ...2 Interlocking Control wiring external to external transmission wiring By using 1 external control adaptor circuit board centralized interlocking input to multiple units within the same water system i...

Page 16: ...e and smart appearance and makes units easy to install Combination table for VRV W Numbers of connectable indoor units 60Hz An condensing unit multi connection piping kit optional is necessary for con...

Page 17: ...nd High Static Pressure FXMQ 07P 09P 12P 18P 24P 30P 36P 48P Ceiling Mounted Duct Type FXMQ 72M 96M Ceiling Suspended Type FXHQ 12M 24M 36M Wall Mounted Type FXAQ 07P 09P 12P 18P 24P Floor Standing Ty...

Page 18: ...type FXDQ07MVJU FXDQ09MVJU FXDQ12MVJU FXDQ18MVJU FXDQ24MVJU Concealed floor standing type FXNQ12MVJU FXNQ18MVJU FXNQ24MVJU Ceiling mounted duct type Middle and high static pressure FXMQ07PVJU FXMQ09PV...

Page 19: ...nce General Information 11 3 3 Condensing Units 6 7 ton 12 14 ton 18 21 ton RWEYQ144PTJU RWEYQ168PTJU RWEYQ144PYDN RWEYQ168PYDN RWEYQ216PTJU RWEYQ252PTJU RWEYQ216PYDN RWEYQ252PYDN RWEYQ72PTJU RWEYQ84P...

Page 20: ...ton 3 Combination ratio Total capacity index of the indoor units Capacity index of the condensing units Type Ton Capacity index Model name Combination Condensing unit multi connection piping kit 1 To...

Page 21: ...2PTJU RWEYQ84PTJU RWEYQ72PYDN RWEYQ84PYDN 14 1 2 BSVQ36 60 96PVJU 16 2 Functional Parts Layout 17 2 1 RWEYQ72PTJU RWEYQ84PTJU RWEYQ72PYDN RWEYQ84PYDN 17 3 Refrigerant Flow for Each Operation Mode 19 3...

Page 22: ...densing unit system J Y7S Four way valve Sub 20S2 Changes the water heat exchanger intocondensing or evaporator K S1NPH High pressure sensor Detects high pressure L S1NPL Low pressure sensor Detects l...

Page 23: ...ort on on site piping side 5 16in flare connection This thermistor is near the electrical components box Fusible plug Electronic expansion valve Water inlet Plate heat exchanger Capillary tube Capilla...

Page 24: ...ctronic expansion valve EVHS Y2E Opens while in heating or all indoor units are in cooling Max 480 pls 4 Electronic expansion valve EVLS Y3E Opens while in cooling Max 480 pls 5 Electronic expansion v...

Page 25: ...y Electronic expansion valve Main Y1E Solenoid valve Y2S Electronic expansion valve Subcooling Y3E Solenoid valve Y3S Four way valve 20S2 Y7S High pressure sensor S1NPH High pressure switch S1PH Solen...

Page 26: ...erant Circuit 2 1 2 Thermistors Top View Front View Heat exchanger gas pipe thermistor R4T Discharge pipe thermistor R3T Receiver outlet liquid pipe thermistor R6T Subcooling heat exchanger outlet pip...

Page 27: ...sure liquid Low temp Low pressure gas Low temp Low pressure liquid Solenoid valve Heat exchanger pipe Filter Filter Filter Filter Fusible plug Electronic expansion valve Electronic expansion valve Wat...

Page 28: ...tronic expansion valve Electronic expansion valve Water inlet Water outlet Solenoid valve Solenoid valve Solenoid valve Capillary tube Capillary tube Capillary tube Plate heat exchanger Service port F...

Page 29: ...ressure liquid Condensing Unit Solenoid valve Heat exchanger pipe Filter Filter Filter Filter Fusible plug Electronic expansion valve Electronic expansion valve Water inlet Water outlet Solenoid valve...

Page 30: ...iquid Low temp Low pressure gas Low temp Low pressure liquid Capillary tube Double pipe heat exchanger Capillary tube Double pipe heat exchanger Capillary tube Double pipe heat exchanger To other cond...

Page 31: ...w temp Low pressure liquid Capillary tube Double pipe heat exchanger Capillary tube Double pipe heat exchanger Capillary tube Double pipe heat exchanger To other condensing unit Solenoid valve Heat ex...

Page 32: ...valve Check valve Check valve Check valve Strainer Gauge port S1NPH S1NPL S1PH High pressure sensor High pressure switch Compressor INV Gauge port 1 4 flare connection Low pressure sensor Capillary t...

Page 33: ...ter Filter Filter Fusible plug Electronic expansion valve Electronic expansion valve Water inlet Water outlet Solenoid valve Solenoid valve Solenoid valve Capillary tube Capillary tube Capillary tube...

Page 34: ...on valve Water inlet Water outlet Solenoid valve Solenoid valve Solenoid valve Capillary tube Capillary tube Capillary tube Plate heat exchanger Service port Four way valve Four way valve Check valve...

Page 35: ...cable Models 28 1 2 Names and Functions 28 1 3 MAIN SUB Setting when Using 2 Remote Controllers 30 1 4 Centralized Control Group No Setting 31 2 Wireless Remote Controller 33 2 1 Applicable Models 33...

Page 36: ...buttons on the remote controller otherwise damage may result 1 Operation mode selector button Press this button to select the operation mode of your preference Available modes vary with the indoor un...

Page 37: ...light the next items on the right hand side Each screen is scrolled in the right hand direction 7 Left button Used to highlight the next items on the left hand side Each screen is scrolled in the left...

Page 38: ...remote controller from MAIN to SUB To change a remote controller from MAIN to SUB proceed as follows 1 3 1 BRC1E71 72 The designation of the main and sub remote controllers can be swapped Note that th...

Page 39: ...tallation table Be sure to keep the installation table with the operation manual for maintenance Service settings menu Item 2 Description This menu is used to make group address setting for centralize...

Page 40: ...n Press Cancel button once Select the desired Group Address using the Up Down buttons and then press Menu OK button Service settings menu is displayed Item 2 is displayed Item 2 is displayed Item 2 is...

Page 41: ...ss Remote Controller 2 1 Applicable Models 2 2 Names and Functions 3P107422 11J Model FXFQ P FXZQ M FXDQ M FXMQ P FXMQ M FXHQ M FXAQ P FXLQ M FXNQ M FXTQ PA Wireless Remote Controller BRC7C812 BRC4C82...

Page 42: ...CTOR BUTTON Press this button to select OPERATION MODE FILTER SIGN RESET BUTTON Refer to the section of MAINTENANCE in the operation manual attached to the indoor unit INSPECTION TEST OPERATION BUTTON...

Page 43: ...e Wireless Remote Controller The address for the wireless remote controller is factory setting to 1 To change this setting proceed as follows 1 Hold down the button and the button for at least 4 secon...

Page 44: ...n operation 4 Indoor unit energized time 5 Condensing operating time 6 Condensing unit fan 1 operation 7 Condensing unit fan 2 operation 8 Condensing comp 1 operation 9 Condensing comp 2 operation Ser...

Page 45: ...nsion valve is open pls 5 SV1 Solenoid valve ON OFF VRV 6 Th1 7 Th2 8 Th3 9 Th4 10 Th5 11 Th6 2 5 Error Display 1 Display Warning ON Displays a warning on the screen if an error occurs 2 Display Warni...

Page 46: ...53 6 Protection Control 55 6 1 High Pressure Protection Control 55 6 2 Low Pressure Protection Control 56 6 3 Discharge Pipe Protection Control 57 6 4 Inverter Protection Control 58 6 5 Cooling Fan C...

Page 47: ...In Heating Only 74 9 9 Heater Control Optional PCB KRP1B is required 75 9 10 Heater Control FXTQ 76 9 11 4 Step Thermostat Processing FXTQ 78 9 12 Interlocked with External Equipment FXTQ 79 9 13 List...

Page 48: ...H Evaporator outlet superheat SHS Target evaporator outlet superheat SVG Y4S Solenoid valve for discharging gas from receiver SVL Y3S Solenoid valve for gas charging to receiver SVE Y2S Solenoid valve...

Page 49: ...ressure equalization startup control Cooling operation Heating operation Cooling Heating simultaneous operation Branch Selector unit Indoor unit operation Slave unit stopping function Compressor contr...

Page 50: ...pansion valve Main EV1 Y1E Heat exchanger mode control In case of cooling operation Heat exchanger mode control In case of heating and simultaneous cooling heating operation Electronic expansion valve...

Page 51: ...or unit fan M1F Remote controller setting Remote controller setting OFF Remote controller setting LL OFF Indoor electronic expansion valve Y1E Normal opening degree 0 pulse 0 pulse Normal opening degr...

Page 52: ...at exchanger SVE Y2S OFF Solenoid valve Receiver gas charging SVL Y3S OFF Solenoid valve Receiver gas discharging SVG Y4S OFF Solenoid valve Non operating unit liquid pipe closing SVSL Y6S ON Branch S...

Page 53: ...gas SVP Y1S OFF OFF Solenoid valve Oil return of water heat exchanger SVE Y2S OFF OFF Solenoid valve Receiver gas charging SVL Y3S ON OFF Solenoid valve Receiver gas discharging SVG Y4S OFF OFF Solen...

Page 54: ...ulse Electronic expansion valve Subcooling EV3 Y3E 0 pulse Solenoid valve Hot gas SVP Y1S OFF Solenoid valve Oil return of water heat exchanger SVE Y2S OFF Solenoid valve Receiver gas charging SVL Y3S...

Page 55: ...l Inverter compressor M1C 0 Hz 52Hz 2 steps 20 seconds until Pc Pe 71 05 psi Inverter cooling fan M1F M2F OFF Inverter cooling fan control Four way valve Main 20S1 Y5S Holding OFF Four way valve Sub 2...

Page 56: ...verter cooling fan control Four way valve Main 20S1 Y5S Holding ON Four way valve Sub 20S2 Y7S Holding OFF Electronic expansion valve Main EV1 Y1E 0 pulse 180 pulse Electronic expansion valve Subcooli...

Page 57: ...lizing control Inverter compressor M1C 74Hz Four way valve Main 20S1 Y5S OFF Four way valve Sub 20S2 Y7S OFF Electronic expansion valve Main EV1 Y1E 2000 pulse Electronic expansion valve Subcooling EV...

Page 58: ...mal factory setting H 37 4 42 8 48 2 Controls compressor capacity to adjust Tc to achieve target value TcS Tc High pressure equivalent saturation temperature F Tc setting F TcS Target temperature of T...

Page 59: ...71Hz 74Hz 81Hz 88Hz 96Hz 104Hz 110Hz 112Hz 120Hz 130Hz 141Hz 156Hz 168Hz 177Hz 189Hz 202Hz 210Hz 216Hz 230Hz 52Hz 57Hz 62Hz 65Hz 68Hz 71Hz 74Hz 81Hz 88Hz 96Hz 104Hz 110Hz 112Hz 120Hz 130Hz 141Hz 156Hz...

Page 60: ...r the full use of the subcooling heat exchanger Heating operation To lower the discharge pipe temperature when the discharge pipe temperature is over 203 F makes PI control of the electronic expansion...

Page 61: ...ain the target value Master unit OFF Condenser Slave unit 1 OFF Condenser Four way valve for heat exchanger Y7S For the application of heat exchanger Content of the control of electronic expansion val...

Page 62: ...Four way valve for heat exchanger Y7S For the application of heat exchanger Content of the control of electronic expansion valve Y1E Control of heat exchange capacity balance Control of heat exchange...

Page 63: ...Pc 397 3 psi Pc 468 3 psi Comp upper limit 216 Hz Pc 507 5 psi INV upper limit frequency 216 Hz INV upper limit up 1 step 30 sec Pc 507 5 psi Frequency control Pc 526 3 psi Comp 52 Hz Less than 2 time...

Page 64: ...nit Note 1 This frequency control is carried out in each condensing unit Normal operation Low pressure standby Pe 10 1 psi Pe 49 3 psi Pe 34 8 psi Pe 56 5 psi Less than 3 times within 60 minutes Pe 49...

Page 65: ...ated with outdoor air temperature Low pressure standby Normal operation Pe 63 8 psi Compressor 52 Hz Pe 10 1 psi When occurring 4 times within 60 minutes the error code E4 is displayed Less than 3 tim...

Page 66: ...is displayed Inverter current A Less than 2 times within 60 minutes Inverter current A Compressor upper limit down 1 step 15 seconds Inverter current A continues for 3 minutes Compressor upper limit u...

Page 67: ...ng fan to cool the inverter This cooling fan operates only when the temperature of the inverter fan is high in order to reduce the operating time of the fan Tfin Radiation fin temperature Details Cont...

Page 68: ...ts Name Preparation Inverter compressor Four way valve Main Normal control Normal control Ending condition 20 seconds Max 8 minutes Max 3 minutes Electric Symbol During Oil Return Operation After Oil...

Page 69: ...ng Indoor unit fan Heating Indoor unit electronic expansion valve Heating During Oil Return Operation After Oil Return Operation Same as normal heating operation Thermostat ON OFF Indoor unit control...

Page 70: ...resulting in the dilution of the refrigerating oil in the compressor and the degradation of lubricating capacity Therefore before the compressor stops pump down residual operation is performed to coll...

Page 71: ...or unit electronic expansion valve Cooling EV Y1E All 0 pulse Ending condition Max 5 minutes Parts Name Symbol Electric Symbol Master Unit Operation Slave Unit Operation Inverter compressor M1C Curren...

Page 72: ...e is large open the solenoid valve Y4S for venting receiver refrigerant of the condensing units that are refrigerant shortage 7 4 2 In case of cooling heating simultaneous connection When the evaporat...

Page 73: ...of the startup control Example The following diagram shows condensing unit rotation in combination of 3 condensing units Note Master unit slave unit 1 and slave unit 2 in this section are the names fo...

Page 74: ...normal stop in 5 minutes if the float switch is turned OFF while the cooling thermo is ON 9 1 2 When the Float Switch is Tripped while the Cooling Thermostat is OFF Note 1 Error residual The remote co...

Page 75: ...on a drain error is determined to have occurred AF is then displayed as operation continues 3 Error residual The remote controller will display A3 and the air conditioner will come to an abnormal stop...

Page 76: ...2 types Note The factory setting position of FXFQ model only round flow is draft prevention position P0 P1 P2 P4 P3 P0 P1 P2 P4 P3 P0 P0 P1 P2 P4 P4 P2 P1 P0 P4 P4 P3 P2 P1 P0 P3 Existing position Dr...

Page 77: ...on of the user when the suction air temperature in indoor unit is near the set temperature Ex When cooling Assuming the set temperature in the figure is 75 F or more and the suction air temperature ha...

Page 78: ...he remote controller thermistor to ensure the lower part of the room is not cold Ex When heating Assuming the set temperature in the figure is 75 F or more and the suction air temperature has changed...

Page 79: ...s on the changing procedure refer to information on page onward 9 5 Thermostat Control in Dry Operation While in dry operation the thermostat control is conducted according to a suction air temperatur...

Page 80: ...t cooling temp Heating mode Cooling mode Control temp Differential value set to 35 6 F 75 2 F 82 4 F Heating mode Cooling mode Control temp Differential value set to 37 4 F 74 3 F Heating mode Cooling...

Page 81: ...ower As T Remote controller set temp Suction air temp becomes smaller SHS becomes higher Subcooling degree control in heating operation This function is used to adjust the opening of the electronic ex...

Page 82: ...ature detected with the gas thermistor TC High pressure equivalent saturated temperature Defrost ending or oil return ending or Thermostat ON The fan is not OFF before initiating the hot start LL The...

Page 83: ...by converting the heater temperature into the condensing pressure equivalent saturated temperature Tc according to the temperature detection through the high pressure sensor S1NPH of the condensing u...

Page 84: ...at Pump Fan normal operation Continues for 5 minutes Continues for 5 minutes Continues for 5 minutes Timer clear Timer clear Timer clear Fan H tap 120 seconds 2 Fan H tap 120 seconds 2 Thermostat OFF...

Page 85: ...OFF conditions for this electrical heater are shown below Thermostat OFF Stop operation Thermostat step 1 H P Fan Normal operation Timer count 5 minutes Timer count 5 minutes Timer count 5 minutes Tim...

Page 86: ...tep 1 ON Not during fan residual operation Electrical heater setting 01 Electrical heater setting 03 Elimination of Condition A Indoor unit error Stop due to error Indoor unit error Abnormal stop Indo...

Page 87: ...3P 1 Refer to 2 4 Setting Contents and Code No for Indoor Units P 92 Factory setting Remote control operation ON including thermostat OFF When the external input changes from ON to OFF Remote control...

Page 88: ...input ON is an input signal to the X11A terminal on the PCB A3P 3 To stop the compressor while the economizer is in operation to save energy 4 Remote control ON signal Contact output which shows the o...

Page 89: ...m thermostat OFF mode for prevention of cold air Swing LL Horizontal Horizontal Horizontal Airflow direction set LL Horizontal Horizontal Horizontal Stop Swing OFF Horizontal Horizontal Totally closed...

Page 90: ...r more for 10 minutes continuously Conditions for starting when airflow direction is two way or three way Conditions for starting Temperature is 33 8 F or less for a total of 15 minutes or 32 F or les...

Page 91: ...g Contents and Code No for Indoor Units 92 3 Field Setting from Condensing Unit 104 3 1 Location of DIP Switch and Branch Selector Button 104 3 2 Setting by DIP Switches 105 3 3 Setting by Branch Sele...

Page 92: ...mpressor is left to stand for an extended period of time after the refrigerant charge with the stop valve open and the power supply OFF the refrigerant may be melted in the compressor thus decreasing...

Page 93: ...ave1 l h h h h h h h l Slave2 l h h h h h h h h Condensing unit Test lamp H2P Blinks Can also be set during operation described above Indoor unit If ON button is pressed during operation described abo...

Page 94: ...former T1R in switch box together Check Setting mode 1 If the LED H1P turns OFF the system is set to Setting mode 1 If the H1P turns ON or blinks pressing the MODE button BS1 will set the system to Se...

Page 95: ...f this test operation check the individual indoor unit for any errors while in normal operation mode using the remote controller While in check operation mode the indoor units as well as the condensin...

Page 96: ...he stop valve Check referring to the table in Additional refrigerant charge U1 The phases of the power to the condensing units are reversed Exchange 2 of the 3 phases L1 L2 L3 to make a positive phase...

Page 97: ...up total setting 1 Press and hold Cancel button for 4 seconds or more Service settings menu is displayed 2 Select Field Settings in the Service Settings menu and press Menu OK button Field settings sc...

Page 98: ...g confirmation screen 6 7 Press Menu OK button Setting confirmation 6 Press Menu OK button Setting confirmation screen is displayed 7 Select Yes and press Menu OK button Setting details are determined...

Page 99: ...d 23 have been selected press the BS8 Q BUTTON unit No and select the INDOOR UNIT NO to be set This operation is unnecessary when setting by group 5 Press the BS9 BUTTON R set A and select FIRST CODE...

Page 100: ...F input from condensing Set when ON OFF is to be controlled from outside Forced OFF ON OFF control External protection device input 2 Thermostat differential changeover Set when remote sensor is to be...

Page 101: ...n returning to the normal mode 5 If the setting mode to Equipped heat reclaim ventilator fan conducts the fan residual operation by linking to indoor unit 6 Only for FXTQ 7 For FXTQ Factory setting is...

Page 102: ...en the Second Code No is set to 03 room temperature is controlled by the room temperature thermistor in remote controller Mode No First Code No Second Code No Standard Filter Long Life Filter Ultra Lo...

Page 103: ...odel 01 Controls ON OFF of the heater in accordance with the thermostat step 03 Without heater Optional Output Switching Using this setting operation output signal and abnormal output signal can be pr...

Page 104: ...ting makes it possible to change differential values for mode selection while in automatic operation mode The automatic operation mode setting is made by the use of the Operation Mode Selector button...

Page 105: ...f Normal Airflow Make the following setting according to the ceiling height The second code No is set to 01 at the factory In the Case of FXAQ FXHQ In the Case of FXFQ12 30 Caution 1 The air condition...

Page 106: ...No Setting Ceiling height 4 way Outlets 3 way Outlets 2 way Outlets 13 23 0 01 Standard N Lower than 10 1 2 ft Lower than 11 12 18 ft Lower than 13 25 32 ft 02 High Ceiling H Lower than 11 12 18 ft L...

Page 107: ...n Pump This is used to interlock the humidifier with the drain pump When water is drained out of the unit this setting is unnecessary Individual Setting of Ventilation This is set to perform individua...

Page 108: ...ventilator and wiring adaptor for other air conditioners etc refer to the installation manual attached NOTICE Enter the group No and installation place of the indoor unit into the attached installati...

Page 109: ...mal mode Group No Setting Example Caution When turning the power supply ON the unit may often not accept any operation while 88 is displaying after all indications were displayed once for about 1 minu...

Page 110: ...ture and operation mode setting by remote controller can be set and displayed by operation modes 0 through 19 ON OFF control impossible by remote controller Used when you want to turn ON OFF by centra...

Page 111: ...y OFF control possible by remote controller Acceptance Rejection Acceptance 2 Rejection 12 Acceptance Acceptance 3 Rejection 13 Centralized Acceptance Rejection Acceptance 4 Rejection 14 Acceptance Ac...

Page 112: ...curs 2 Set mode display LED LEDs display mode according to the setting 3 Branch Selector button Used to change mode 4 DIP switch Used to make field settings BS1 MODE SET RETURN TEST RESET BS2 BS3 BS4...

Page 113: ...ettings OFF Factory setting DS2 1 4 ON Not used Do not change the factory settings OFF Factory setting Caution DIP switch setting after changing the condensing unit main PCB A1P to spare PCB When you...

Page 114: ...r mode H1P blinks Used to check the program made in Setting mode 2 Mode changing procedure Using the MODE button the modes can be changed as follows H1P H2P H3P H4P H5P H6P H7P H8P Master unit h h k h...

Page 115: ...h Error h k k h h h h Preparing Test operation h l k h h h h Normal h h k h h h h During demand operation h h k h h h k H3P to H5P LED display changes depending on setting No 2 3 4 Selection of setti...

Page 116: ...Changes target value of power consumption when demand control 1 is input 32 Normal demand setting Normally enables demand control 1 without external input Effective to prevent a problem that circuit b...

Page 117: ...ration khhhhkh 8 Te setting k h h k h h h Low L tap khhhhhk Normal M tap khhhhkh High N khhhhkk High O khhhkhh High P H tap khhhkhk High Q khhhkkh High R khhhkkk 9 Tc setting k h h k h h k Low khhhhhk...

Page 118: ...rgency operation Master unit with multi condensing unit system is inhibited to operate k k h h k k h OFF khhhhhk Master unit operation Inhibited khhhhkh 39 Emergency operation Slave unit 1 with multi...

Page 119: ...one units excluding condensing and Branch Selector units l h h k h k k Lower 6 digits 3 12 Number of terminal blocks l h h k k h h Lower 4 digits upper 4 13 Number of terminal blocks l h h k k h k Low...

Page 120: ...there is condensing condensing unit wiring Set condensing unit PCB DS1 1 to IN factory setting Set cool heat switching to IND individual for Setting mode 1 factory setting 3 Data such as addresses and...

Page 121: ...there is condensing condensing unit wiring Set condensing unit PCB DS1 1 to OUT factory setting Set cool heat switching to IND individual for Setting mode 1 factory setting MODE TEST MALFNC C H SELECT...

Page 122: ...ors are used and cool heat is selected for each external control adaptor use setting mode 2 and set DS1 and DS2 on the external control adaptors and the unified heat cool address on the condensing uni...

Page 123: ...or each external control adaptor use setting mode 2 and set DS1 and DS2 on the external control adaptors and the unified heat cool address on the condensing unit main PCB to the same address No For de...

Page 124: ...densing unit group master No 1 Condensing unit group slave No 1 External control adaptor No 3 Condensing unit group master No 3 Condensing unit group slave No 3 Condensing unit group slave No 0 Extern...

Page 125: ...LAVE C H SELECT C H SELECT MODE TEST L N O P DEMAND OUT O C H SELECTOR I O O O OUT MULTI IN I MASTER IND SLAVE C H SELECT C H SELECT MODE TEST L N O P DEMAND OUT O C H SELECTOR I O O O OUT MULTI To in...

Page 126: ...No No 0 No 0 No 0 No 0 No 1 No 2 No 3 No 3 Terminal No No 0 No 1 No 2 No 3 No 4 No 5 No 6 No 7 as same as same Condensing unit main PCB LED Set with setting mode 2 0 0 0 1 0 2 0 3 1 4 2 5 3 6 3 7 Cent...

Page 127: ...ting transmission wiring Connect the transmission wirings as shown in the Fig 1 ON OFF DS1 1 2 X1M A B C COOL HEAT selector F2 B C A F2 F1 F1 F2 F1 Condensing unit TOIN DUNIT TOOUT DUNIT F1 F2 F1 F2 F...

Page 128: ...external control adaptor for condensing unit is not required 1 While in Setting mode 2 make setting of the set item No 32 Setting of alternate demand to ON 2 While in Setting mode 2 select the set it...

Page 129: ...etting When the Normal demand setting is set to ON OFF has been set at factory the power consumption can be set with the Demand 1 level setting 70 of rated power consumption has been set at factory Po...

Page 130: ...ET button several times and match the LED display with the setting content as shown below you want 4 Press the BS3 RETURN button twice Returns to 1 5 Press the BS1 MODE button once Returns to the sett...

Page 131: ...lowing page for detail Confirm discharge suction and liquid stop valves closed Is all refrigerant charged Is all refrigerant charged YES NO YES NO Turn OFF the power Charge through service port of liq...

Page 132: ...connection for the amount to be added Additional refrigerant charge procedure 1 normally Charge the refrigerant to the liquid pipe in its liquid state Since R 410A is a mixed refrigerant its composit...

Page 133: ...the stop valve immediately liquid seal may cause the pipe to burst Stop valve operation procedure Do not open the stop valve until checking of device and installation conditions are completed If the s...

Page 134: ...3 to 4 turns as the initial tightening Do not forget to open the stop valve before starting operation Operation state Compressor frequency Normal cooling PI control upper limit 177Hz Y5S Y7S four way...

Page 135: ...the instruction attached to the refrigerant recovery unit for more detail 3 Press Mode button BS1 once and reset Setting Mode 2 3 7 6 Setting of Vacuuming Mode In order to perform vacuuming operation...

Page 136: ...isconnecting the wiring of compressor After the completion of checks return the system to the previous mode and wait for 30 seconds or more until the discharge of capacitor is completed Then conduct a...

Page 137: ...ossible to perform emergency operation automatically However in the event any of the following errors occurs automatic backup operation can be performed Errors under which automatic backup operation c...

Page 138: ...5 Press the RETURN button BS3 twice 6 Press the MODE button BS1 once To inhibit the slave unit 2 from operating Set setting mode 2 from No 40 to No 2 Procedure 1 Press and hold the MODE button BS1 fo...

Page 139: ...166 3 10 Electronic Expansion Valve Coil Abnormality Dust Clogging 167 3 11 Electronic Expansion Valve Coil Abnormality 168 3 12 Drain Level above Limit 169 3 13 Capacity Determination Device Abnormal...

Page 140: ...en Phase 215 3 43 Power Supply Insufficient or Instantaneous Failure 216 3 44 Check Operation is not Executed 218 3 45 Transmission Error between Indoor Units and Condensing Units 219 3 46 Transmissio...

Page 141: ...conditioning load In cooling Too many heat sources e g OA equipment located in a room 4 The system does not operate The system stops and immediately restarts operation If the OPERATION lamp on the re...

Page 142: ...oor unit is 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 T...

Page 143: ...compressor changes the operating frequency Normal operation 12 Dust comes out from the system Dust comes out from the system when it restarts after the stop for an extended period of time Dust which h...

Page 144: ...utton once Press Cancel button for 4 seconds or more Press Cancel button once Press Cancel button once Press Menu OK button once Service Settings Test Operation Maintenance Contact Field Settings Ener...

Page 145: ...action specified for the particular model 1 Checking an error or warning Screen Operation lamp Operation Status Display Abnormal shutdown The system stops operating The operation lamp green starts to...

Page 146: ...beeps Conduct all of the following operations 1 short beep Conduct steps 3 and 4 Continue the operation in step 4 until a buzzer remains ON The continuous buzzer indicates that the error code is confi...

Page 147: ...mode from normal status when the INSPECTION TEST button is pressed 2 1 Press INSPECTION TEST button If no button is pressed for 1 minute equipment returns to normal status When MODE selector button i...

Page 148: ...ng corrective action Screen Operation lamp Operation Status Display Abnormal shutdown The system stops operating The operation lamp green starts to blink The message Error Press Menu button will appea...

Page 149: ...STD compressor 1 OC activated Slave 1 E6 04 STD compressor 2 OC activated Slave 1 E6 05 STD compressor 1 OC activated Slave 2 E6 06 STD compressor 2 OC activated Slave 2 E7 01 Fan motor 1 lock Master...

Page 150: ...o the left J2 02 Faulty current sensor Master STD compressor 2 J2 03 Faulty current sensor Slave 1 STD compressor 1 J2 04 Faulty current sensor Slave 1 STD compressor 2 J2 05 Faulty current sensor Sla...

Page 151: ...04 IGBT error Master Inverter PCB The inverter PCB may be faulty or a PCB other than the specified one is mounted Refer to the L1 flow chart of each manual and make a diagnosis of the relevant unit ba...

Page 152: ...PCB and main PCB Slave 2 P1 01 Unbalanced power supply voltage Master Refer to the P1 flow chart of each manual and make a diagnosis of the relevant unit based on the Error code shown to the left P1 0...

Page 153: ...Remote Controller Abnormality 178 condensing Unit E1 l PCB Abnormality 179 E2 l Ground Leakage by Leak Detection PCB Assy 180 E3 l Actuation of High Pressure Switch 182 E4 l Actuation of Low Pressure...

Page 154: ...s 222 U8 l Transmission Error between Main and Sub Remote Controllers 228 U9 l Transmission Error between Indoor and Condensing Units in the Same System 229 UA l Improper Combination of Indoor Branch...

Page 155: ...pipe temperature Abnormal Td F3 Abnormal heat exchanger temperature Refrigerant overcharge F6 Defective sensor of discharge pipe temperature Defective Tdi sensor J3 Defective sensor of heat exchanger...

Page 156: ...l l h l k k h h J3 l h k h l l h l k h h h l l l k k h l J4 l k h h k h h l k k h l J5 l k h h l h l l k k h h J7 l k h h l l l l k k h h J9 l k h l h h l l k k h h JA l k h l h l h l k k h h JC l k h...

Page 157: ...s of error Error code Refrigerant shortage Refrigerant shortage alarm U0 Reverse phase Reverse phase error U1 Abnormal power supply voltage Insufficient inverter voltage U2 Inverter open phase phase T...

Page 158: ...k l h h l l k h h h h h l k k h h U1 l k h h h h l l k k h h U2 l k h h h l h l k k h l U3 l k h h h l l l k k h h U4 l k h h l h h l k k h h U7 l k h h l l l l k k h h U9 l k h l h h l l k k h h UA l...

Page 159: ...inal Supposed Causes Actuation of external protection device Improper field setting Defective of indoor unit PCB Troubleshooting ON OFF input from condersing unit mode No 12 first code No 1 has been s...

Page 160: ...Type of nonvolatile memory Maintains memory contents even when the power supply is turned off Supposed Causes Defective of indoor unit PCB External factor Noise etc Troubleshooting Turn the power supp...

Page 161: ...ption FXHQ Option FXAQ Option Method of 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 Cause...

Page 162: ...forming a short circuit continuity check with X8A or X15A disconnected Becomes normal when X8A or X15A of the indoor unit PCB is short circuited Is power supply 208 230V provided Caution Be sure to tu...

Page 163: ...utions do not increase Supposed 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 sign...

Page 164: ...the indoor unit PCB the fan can be lightly rotated by hand Replace the fan motor NO Replace the fan motor NO YES Are there any foreign matters around the fan YES Is the resistance between the pins mor...

Page 165: ...pply cable Turn OFF the power supply Measure the resistance between phases of U V W at the motor side connectors 3 core wire to check that the values are balanced and there is no short circuiting whil...

Page 166: ...fan Supposed Causes Defective indoor fan motor Broken wires Defective contact Troubleshooting NO YES YES Is the X4A connector securely connected NO Is the power of approx 12VDC supplied between the Pi...

Page 167: ...on signal of the fan motor Error from 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 se...

Page 168: ...an PCB A2P NO Replace the fan motor YES NO YES The fan can be moved lightly by hand after the fan motor connector of the fan PCB A2P is removed Replace the fan motor NO YES NO YES There is a foreign m...

Page 169: ...Hv or Hu terminals are short circuited Replace the fan motor YES Replace the fan PCB A2P YES NO The resistance among U V and W are unbalanced or short circuited NO The HAP lamp of the indoor unit PCB...

Page 170: ...nd there is no short circuiting while connector or relay connector is disconnected 2 Measurement of signal wire connector Remove the X2A connector and measure the resistance between GND and VCC HW HV...

Page 171: ...ON while in operation Supposed Causes Defective power supply for the indoor unit fan motor Clogged drain piping Actuation of the indoor unit safety device Defective contact in the fan wiring circuit...

Page 172: ...he motor turns Error 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 second...

Page 173: ...d Is power supply 208 230V provided Provide 208 230V power supply YES NO Replace the limit switch relay cable Replace the indoor unit PCB Replace the power supply relay cable Replace the swing motor T...

Page 174: ...al line Defective wiring Instantaneous blackout others Troubleshooting Check the condition of the power supply Check if power supply voltage is 208 230V 10 Check if there is power open phase or defect...

Page 175: ...46 4 F Temperature of liquid pipe of heat exchanger R2T shows fixed degrees or below Supposed Causes Defective of electronic expansion valve coil Defective PCB indoor unit Defective relay cables Trou...

Page 176: ...nsion valve coil Defective PCB indoor unit Defective relay cables Troubleshooting Refer to P 249 NO YES YES Electronic expansion valve is connected to X7A of indoor unit PCB NO YES Coil check of elect...

Page 177: ...the compressor is in non operation Error code is displayed but the system operates continuously Supposed Causes Humidifier unit optional accessory leaking Defective drain pipe upward slope etc Defecti...

Page 178: ...sion Conditions When 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 s...

Page 179: ...unit PCB A1P Defective fan PCB A2P External factor such as instantaneous blackout Troubleshooting Under above field setting mode second code No is 01 NO NO YES Replace the fan PCB A2P YES YES Is the c...

Page 180: ...he power and remove the connecter X70A of indoor unit PCB A1P O Short circuit X70A P After turning ON the power check below numbers under field setting from remote controller Confirmation Second code...

Page 181: ...ing Note 1 Error code and thermistor Refer to P 250 Is the thermistor normal Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged 5 k to 9...

Page 182: ...pposed Causes Defective fan PCB A2P Defective connection of capacity setting adaptor Field setting error Troubleshooting NO Is the type of fan PCB A2P correct Caution Be sure to turn off the power swi...

Page 183: ...thermistor R1T for air inlet Defective indoor unit PCB Troubleshooting Refer to P 250 Is the optional remote sensor is installed Field setting 10 20 2 is set at C3 Connector is connected to X16A of th...

Page 184: ...door unit PCB Troubleshooting Note 1 Error code and thermistor Refer to P 250 Is the thermistor normal Caution Be sure to turn off the power switch before connecting or disconnecting connectors or par...

Page 185: ...conds in the check mode 2 To display the code the INSPECTION TEST Operation button of the remote controller must be pressed and held in the normal mode 3 If CC is displayed even after replacing the hu...

Page 186: ...is running Supposed Causes Defective room temperature thermistor in remote controller Defective remote controller PCB Troubleshooting Note 1 How to delete the history of error codes Press the ON OFF...

Page 187: ...ndoor unit and the condensing unit are not normal Supposed Causes Defective condensing unit PCB A1P Defective connection of inside condensing relay wires Troubleshooting Return to normal Caution Be su...

Page 188: ...o turn off the power switch before connecting or disconnecting connectors or parts may be damaged Check the compressor for insulation using a megger tester Check the whole product for insulation resis...

Page 189: ...en both X3A ends of the ground leakage detection PCB A3P Check whether there is continuity between both ends of high pressure switch Continuity Continuity Turn ON the power supply Normal No continuity...

Page 190: ...ous power failure Defective high pressure sensor Troubleshooting NO YES YES YES Are the 3 points above OK Is the high pressure switch operating value normal i e 580 psi Does the stop due to error E3 r...

Page 191: ...1 Refer to P 251 NO YES Check if the high pressure value and the actual measurement value by pressure sensor are the same Replace the condensing unit main PCB A1P The high pressure sensor is normal an...

Page 192: ...cs of the low pressure sensor normal 1 Open the stop valve Mount a pressure gauge on the low pressure service port Reset the operation using the remote controller and then restart the operation Replac...

Page 193: ...the pressure gauge As to the voltage of the pressure sensor make measurement of voltage at the connector and then convert it to pressure according to information on P 251 2 Make measurement of voltage...

Page 194: ...ore Incorrect UVW wiring Defective inverter PCB Stop valve is not opened Troubleshooting The compressor coil has disconnection of wires Is the wiring the same as in the electric wiring diagram Is the...

Page 195: ...ive Return the inverter PCB to original position Continue the operation Power ON Power ON Power OFF Replace the inverter PCB A Restart and check the operation Check if the condition occurs again Is th...

Page 196: ...stance of electronic expansion valve is normal 1 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged The connector of condensing unit PCB...

Page 197: ...ansion valve from the PCB and check the continuity between the connector pins Normal Continuity No continuity Pin No 1 White 2 Yellow 3 Orange 4 Blue 5 Red 6 Brown 1 White Approx 300 Approx 150 2 Yell...

Page 198: ...the value based on the surface thermometer Refer to P 243 Refer to P 250 NO Check if temperature of discharge pipe by using service checker is the same with actual measurement value of discharge pipe...

Page 199: ...nection of discharge pipe thermistor Troubleshooting Is the thermistor mounted properly Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damag...

Page 200: ...rvice Diagnosis Refer to P 245 Refer to P 250 Error is displayed again YES NO There is a possibility that there are other causes of refrigerant overfilling Remove the causes of wet operation CHECK 5 C...

Page 201: ...mpressor With interlock setting provided when interlock circuit is turned OFF Supposed Causes Clogged water piping system Insufficient heat exchanger water Dirty heat exchanger Disconnected connector...

Page 202: ...eration YES NO Replace the inverter PCB concerned CHECK 4 A Is the coil of compressor broken Are characteristics of the thermistor on the heat exchanger gas side R4T and the low pressure sensor S1NPL...

Page 203: ...or Refer to P 250 Connect correctly Is it normal Replace the condensing unit PCB A1P NO Caution Remove thermistor from condensing unit PCB then measure the resistance using a tester Check connectors f...

Page 204: ...ion of high pressure sensor Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged If the PCB pressure detection normal Make...

Page 205: ...eshooting by Indication on the Remote Controller Service Diagnosis 197 Note 1 Connector code Refer to P 251 Refer to P 251 Model name Connector RWEYQ72 84PTJU X46A RWEYQ72 84PTJU9 X32A RWEYQ72 84PYDN...

Page 206: ...n of low pressure sensor Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged If the PCB pressure detection normal Make a...

Page 207: ...eshooting by Indication on the Remote Controller Service Diagnosis 199 Note 1 Connector code Refer to P 251 Refer to P 251 Model name Connector RWEYQ72 84PTJU X45A RWEYQ72 84PTJU9 X31A RWEYQ72 84PYDN...

Page 208: ...exceeded a temperature of 188 6 F NO Error is displayed again when the power supply turns ON to start the compressor Turn OFF the power supply and then make measurement of resistance of the radiation...

Page 209: ...301 Troubleshooting by Indication on the Remote Controller Service Diagnosis 201 Note 1 Connector code Refer to P 250 Model name Connector RWEYQ72 84PTJU X7A RWEYQ72 84PTJU9 X7A RWEYQ72 84PYDN X111A C...

Page 210: ...WEYQ72P 84P Method of Error Detection Error is detected from current flowing in the power transistor Error Decision Conditions When an excessive current flows in the power transistor Instantaneous ove...

Page 211: ...ance of the compressor 100 k or less Are the wiring and connection to the compressor normal Are the compressor lead wires normal Open the stop valve NO NO NO YES YES NO NO YES YES YES NO NO Power OFF...

Page 212: ...WEYQ72P 84P Method of Error Detection Error is detected by current flowing in the power transistor Error Decision Conditions When overload in the compressor is detected 230V unit 26 1A for 260 sec or...

Page 213: ...again Check if the pressure difference between high pressure and low pressure before restarting is 29 psi or below Compressor coils are disconnected YES Caution Be sure to turn off the power switch b...

Page 214: ...al time to start after installation Is a right amount of refrigerant charged Is the stop valve opened Refrigerant is melting in refrigerant oil The unit is out of power supply for more than 6 hours Is...

Page 215: ...t is out of power supply for more than 6 hours Broken wire inside the compressor Continued from the previous page Starting error due to aged operation Recheck the compressor refrigerant circuit Cancel...

Page 216: ...ate between inverter PCB and condensing unit main PCB by micro computer Error Decision Conditions When the transmission is not carried out in a specified period of time or longer Supposed Causes Incor...

Page 217: ...sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Replace it with a correct PCB Properly connect the connectors Replace the INV compressor M1C Re...

Page 218: ...s 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 K1 K2 contact disposition fus...

Page 219: ...iation fin temperature thermistor Defective inverter PCB Defective inverter compressor Defective fan motor Troubleshooting Refer to P 250 Caution Be sure to turn off the power switch before connecting...

Page 220: ...osed Causes Defective or no field setting after replacing condensing unit main PCB Mis matching of type of PCB Troubleshooting Does the preparation indication lamp H2P on the condensing unit main PCB...

Page 221: ...on pipe and heat exchanger temperature Error Decision Conditions In cooling Low pressure becomes 14 5 psi or less In heating The degree of superheat of suction gas becomes 68 F and over SH Ts1 Te Ts1...

Page 222: ...be damaged NO NO YES YES Check if the property of low pressure sensor is normal 2 Check if the low pressure is 14 5 psi or below 1 Remove the factor of decreasing low pressure by referring to CHECK 2...

Page 223: ...posed Causes Power supply reverse phase T phase open phase Defective condensing unit PCB Troubleshooting Operation is normal if one place of power supply line phase is replaced There is an open phase...

Page 224: ...the inverter PCB and power supply voltage Error Decision Conditions When the voltage aforementioned is not less than 780V or not more than 320V or when the current limiting voltage does not reach 200V...

Page 225: ...e connection wire To diagnosis error code P1 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged NO YES Measure the voltage between termi...

Page 226: ...cided when the unit starts operation without check operation Supposed Causes Check operation is not executed Troubleshooting Has the check operation performed on condensing unit PCB Performs the check...

Page 227: ...Micro computer checks if transmission between indoor and condensing units is normal Error Decision Conditions When transmission is not carried out normally for a certain amount of time Supposed Causes...

Page 228: ...fuse on the condensing unit PCB blown The secondary voltage of the transformer is about 20V only for 230V units Lights do not go out for 12 minutes or more Are the indoor condensing condensing conden...

Page 229: ...ransmission error caused by noise Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Operation returns to normal when th...

Page 230: ...sion is not carried out normally for a certain amount of time Supposed Causes Improper connection of transmission wiring between condensing unit and external control adaptor for condensing unit Improp...

Page 231: ...nosis Flow 4 Abnormal transmission between the master unit and the slave unit 2 Go on to the Diagnosis Flow 6 Erroneous manual address settings of the slave units 1 and 2 Go on to the Diagnosis Flow 7...

Page 232: ...ES Connect the power supply wire for the external control adaptor for condensing unit to 5V supply line Replace the condensing unit main PCB Replace the PCB of the external control adaptor for condens...

Page 233: ...Then check if the error occurs again Check if power is supplied to the condensing unit Check if the normal condition monitor LED for the condensing unit main PCB blinks NO NO YES YES YES YES YES YES...

Page 234: ...e condensing unit main PCB of the SLAVE 2 Diagnosis Flow 3 Diagnosis Flow 4 Check of error 3 Replace the condensing unit main PCB of the SLAVE 1 Correct the relay wires of the condensing multi and the...

Page 235: ...connection status of the condensing multi check if more than 4 condensing units are connected Diagnosis Flow 6 Correct the relay wires of the condensing multi and then reset the power supply Replace t...

Page 236: ...or specified period Supposed Causes Transmission error between main and sub remote controller Connection between sub remote controllers Defective remote controller PCB Troubleshooting Caution Be sure...

Page 237: ...other system Defective electronic expansion valve in indoor unit of other system Defective indoor unit PCB in other system Improper connection of transmission wiring between indoor and condensing uni...

Page 238: ...een indoor Branch Selector and condensing units The number of indoor units is out of the allowable range Signal transmission between indoor Branch Selector and condensing units is abnormal Error Decis...

Page 239: ...error 4 Check of error 3 Check of error 4 Check of error 3 Check of error 4 Check of error 3 Check of error 4 Check of error 3 Check of error 4 To Diagnosis Flow 1 To Diagnosis Flow 6 Caution Be sure...

Page 240: ...the setting of spare PCB correct Check the model of the condensing unit Correct the setting to reset the power NO NO Replace it with correct spare PCB NO NO YES YES Is a correct spare PCB procured YE...

Page 241: ...ck of error 3 Check of error 4 Check of error 3 Check of error 4 Diagnosis Flow 6 Is the wiring between the indoor and Branch Selector unit correct YES NO Connect the model BSVQ P Replace the condensi...

Page 242: ...ress as that of its own on any other indoor unit Error Decision Conditions The error decision is made as soon as the abnormality aforementioned is detected Supposed Causes Address duplication of centr...

Page 243: ...ror Detection Micro computer checks if transmission between indoor unit and centralized control equipment is normal Error Decision Conditions When transmission is not carried out normally for a certai...

Page 244: ...S Make sure there are no hazardous situations and then turn the power ON NO Check whether or not there are no problems with the transmission wiring length branch numbers types of cables and wires numb...

Page 245: ...s section Abnormal Correct the wiring Abnormal Normal Has the main centralized control equipment setting connector been connected Correct the connection of the connector NO Replace the centralized con...

Page 246: ...ion wiring between indoor condensing units and condensing condensing units Failure to execute check operation Defective indoor unit PCB Stop valve is not opened Troubleshooting Is indoor condensing an...

Page 247: ...models RWEYQ72P 84P Method of Error Detection Detect an indoor unit with no auto address setting Error Decision Conditions The error decision is made as soon as the abnormality aforementioned is detec...

Page 248: ...it PCB has been replaced Does an error occur even after 12 minutes elapses from the time when electricity is introduced to indoor and condensing units NO Replace the indoor unit PCB Does a UH error oc...

Page 249: ...tive valve coil Defective valve body Defective high pressure sensor Defective control PCB Defective valve coil Defective valve body Defective high pressure sensor Defective indoor unit liquid pipe the...

Page 250: ...tive control PCB Defective low pressure sensor Defective hot gas solenoid valve Defective control PCB Defective valve coil Defective valve body Defective gas pipe thermistor of indoor unit Defective l...

Page 251: ...collapse Including moisture choke Stop valve is closed Hot gas circuit clogging Defective solenoid valve coil Defective solenoid valve body Defective control PCB Subcooling electronic expansion valve...

Page 252: ...ecommended A tester in the digital system with diode check function will be usable To use analog tester Measurement in the resistance value mode in the range of multiplying 1k To use digital tester Me...

Page 253: ...ive control Defective control Defective valve coil Defective control PCB Defective valve body Defective valve coil Defective valve body Defective power pressure sensor Defective suction pipe thermisto...

Page 254: ...ECK 6 Cooling High pressure Low pressure Frequency High pressure gradually rises with increase in frequency Subcooling degree becomes higher Liquid connection pipe temperature lowers Low pressure rise...

Page 255: ...equency comes to the minimum level Fan control is activated for high pressure protection under cooling control at low outdoor air temperature i e the fan is hunting at high pressure High pressure drop...

Page 256: ...psi or less for a period of 1 hour or more and then check to be sure that the vacuum gauge reading does not rise If the reading rises moisture may have remained in the system or refrigerant leakage m...

Page 257: ...and check the continuity to judge the condition The normal products will show the following conditions 1 No continuity between 1 and 2 2 Resistance value between 1 and 3 is approx 300 3 Resistance va...

Page 258: ...2 635 0831 41 49 70 41 50 9947 41 496 5712 50 38 85 50 39 9149 50 391 0070 59 30 61 59 31 4796 59 309 9511 68 24 29 68 25 0060 68 247 2696 77 19 41 77 20 0000 77 198 4674 86 15 61 86 16 1008 86 160 22...

Page 259: ...Side VDC PH 1 38VH 0 69 PL 0 57VL 0 28 PH High pressure PL Low pressure Output Voltage VH VL Detected Pressure psi 652 580 507 435 362 290 217 145 72 0 72 725 CHECK 13 5V 4 3 3 2 1 Connector for high...

Page 260: ...edure for Mounting Dismounting of Switch Box Part 7 Procedure for Mounting Dismounting of Switch Box 1 Procedure for Mounting Dismounting of Switch Box 253 1 1 Procedure for Dismounting 253 1 2 Proced...

Page 261: ...mounting of Switch Box 1 2 Procedure for Mounting Mount the switch box following the procedure for dismounting in reverse After the completion of mounting check to be sure connectors are all properly...

Page 262: ...Procedure for Mounting Dismounting of Switch Box SiUS30 1301 254 Procedure for Mounting Dismounting of Switch Box Screw Unscrew the mounting screws Connect Disconnect the wirings...

Page 263: ...iagrams 256 1 1 Indoor Unit 256 1 2 Branch Selector Unit 258 1 3 Centralized Branch Selector Unit 259 2 Wiring Diagrams for Reference 260 2 1 Condensing Unit 260 2 2 Indoor Unit 263 2 3 Branch Selecto...

Page 264: ...4PVJU FXLQ 12M 18M 24MVJU FXNQ 12M 18M 24MVJU R1T Thermistor for suction air temperature R2T Thermistor for liquid line temperature R3T Thermistor for gas line temperature C DU220 602L Heat exchanger...

Page 265: ...Appendix 257 FXDQ Refrigerant pipe connection port diameters 4D043864N Gas side Liquid side Filter Filter Fan Indoor heat exchanger Electronic expansion valve Model Gas Liquid FXDQ07M 09M 12M 18MVJU...

Page 266: ...on port HP LP gas pipe connection port Suction gas pipe connection port Gas pipe connection port Double pipe heat exchanger Electronic Expansion Valve EVSC Electronic Expansion Valve EVHS Electronic E...

Page 267: ...llary tube Electronic Expansion Valve EVSC Electronic Expansion Valve EVHC Electronic Expansion Valve EVH Electronic Expansion Valve EVLC Electronic Expansion Valve EVL Filter Filter Filter Filter Fil...

Page 268: ...ANSION VALVE MAIN ELECTRONIC EXPANSION VALVE SUBCOOLING SOLENOID VALVE HOT GAS BYPASS SOLENOID VALVE OIL RECOVERY SOLENOID VALVE RECEIVER PRESSURIZATION SOLENOID VALVE RECEIVER GAS PURGE SOLENOID VALV...

Page 269: ...ELECTRONIC EXPANSION VALVE MAIN ELECTRONIC EXPANSION VALVE SUBCOOLING SOLENOID VALVE HOT GAS BYPASS SOLENOID VALVE OIL RECOVERY SOLENOID VALVE RECEIVER PRESSURIZATION SOLENOID VALVE RECEIVER GAS PURGE...

Page 270: ...ON 10 COOL HEAT SELECTOR CAN NOT BE CONNECTED WHEN OPERATING HEAT RECOVERY SYSTEM 11 COLORS BLK BLACK RED RED BLU BLUE WHT WHITE ORG ORANGE GRN GREEN A1P A2P A3P A4P A5P A6P BS1 5 C63 C66 DS1 DS2 E1HC...

Page 271: ...V1TR X1M L1 L2 X18A A1P X12A RED L2 M t t t t X30A BLK Q1M KPR X3A X4A P2 HAP YLW RED GRN YLW R3T WHT X28A M YLW YLW SS1 NOTE 2 BS1 X16A BLK X8A T2 F1 T1 P2 F2 P1 X11A R2T R1T M1F SS1 PNK YLW R1T S1L...

Page 272: ...NUAL ATTACHEDTHE UNIT 4 COLORS BLK BLACK RED RED BLU BLUE WHT WHITE PNK PINKYLW YELLOW BRN BROWN GRY GRAY GRN GREEN ORG ORANGE TRANSMISSION WIRING CENTRAL REMOTE CONTROLLER OPTIONAL ACCESSORY NOTE 2 R...

Page 273: ...A ORG NOTE 7 NOTE 7 F1 A1P BLU P2 X36A X20A X7A BLK P1 A1P X2M X1M X2M P2 ORG RED BLU BRN WHT R1T P1 HAP X1M SIDE X1M MS M MSW HAP FRONT M1S Y1E M1F CONTROL BOX INDOOR UNIT POWER SUPPLY 1 208 230V 60H...

Page 274: ...R ON OFF CONTROL OPERATION CAN BE SELECTED BY REMOTE CONTROLLER IN DETAILS REFER TO THE INSTALLATION MANUAL ATTACHED THE UNIT 6 SYMBOLS SHOW AS FOLLOWS BLU BLUE BLK BLACK ORG ORANGE PNK PINK RED RED W...

Page 275: ...CONNECTING THE INPUT WIRES FROM CONDENSING UNIT FORCED OFF OR O CONTROL OPERATION CAN BE SELECTED BY REMOTE CONTROLLER IN DETAILS RE THE INSTALLATION MANUAL ATTACHED THE UNIT 4 COLORS PNK PINK WHT WH...

Page 276: ...XPANSION VALVE SUB DISCHARGE ELECTRONIC EXPANSION VALVE SUB SUCTION ELECTRONIC EXPANSION VALVE MAIN DISCHARGE ELECTRONIC EXPANSION VALVE MAIN SUCTION NOISE FILTER FERRITE CORE CONNECTOR FOR OPTIONAL P...

Page 277: ...E 3 X2M X4A X8A X5A X6A X7A M M M M M Y5E Y4E Y2E Y3E Y1E TO IN D UNIT 5 5 5 5 5 A3P F1U PS X1A X1M DS2 NOTE 7 F2 F1 DS1 F2 F1 X38A HAP NOTE 3 X2M X4A X8A X5A X6A X7A M M M M M Y5E Y4E Y2E Y3E Y1E TO...

Page 278: ...IS WIRING DIAGRAM APPLIES TO THE CENTRALIZED BS UNIT ONLY 2 TERMINAL STRIP CONNECTOR FIELD WIRING PROTECTIVE GROUND 3 WHEN USING THE COOL HEAT SELECTOR OPTIONAL ACCESSORY CONNECT IT TO TERMINALS A B A...

Page 279: ...SiUS30 1301 Wiring Diagrams for Reference Appendix 271...

Page 280: ...r to install those parts and accessories Use of unauthorized parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage electrical shock fire or...

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