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Daikin ALTHERMA HT EKBUHAA6 V3, Service Manual

The Daikin ALTHERMA HT EKBUHAA6 V3 is an efficient and reliable heating system. To assist you in optimizing its performance, we provide a comprehensive Service Manual. This manual contains essential instructions, troubleshooting tips, and maintenance guidelines that users can download for free from manualshive.com.

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ESIE09-08A

Basic Control

Function

55

2. Basic Control

2.1

Normal Operation

Heating Operation Outdoor Unit

Heating operation is not functional at an outdoor air temperature of field setting [9-02]. Default [20°C - 24°C].

Heating Operation Indoor Unit

Actuator

Operation

Remarks

Compressor

Compressor PI control

Used for high pressure protection control, low pressure 
protection control, discharge pipe temperature 
protection control, and compressor operating frequency 
upper limit control with inverter protection control.

Outdoor unit fan

STEP 7 or 8

All steps possible, mainly STEP 7 OR 8

Four way valve

ON

Main electronic expansion valve (EV1)

PI control

Subcooling electronic expansion valve 
(EV3)

PI control

Hot gas bypass valve (SVP)

OFF

This valve turns on with low pressure protection control.

Actuator

Operation

Remarks

Compressor

Compressor PI control

Used for high pressure protection control, low pressure 
protection control, discharge pipe temperature 
protection control, and compressor operating frequency 
upper limit control with inverter protection control.

Four way valve (Y1R)

OFF

Only activated during defrost.

Two way valve (K2S) = solenoid valve

CLOSED

Only open during defrost.

Electronic expansion valve (K1E)

PI control

Electronic expansion valve (K2E)

PI control

DC inverter pump

PI control

Summary of Contents for ALTHERMA HT EKBUHAA6 V3

Page 1: ...ESIE09 08A Service Manual Daikin ALTHERMA HT ERSQ 011 014 016 AA V1 Y1 ERRQ 011 014 016 AA V1 Y1 EKHBRD 011 014 016 AA AB AC V1 Y1 R 410A R 134a EKHTS U 200 260 A AB AC EKBUHAA6 V3 W1 ...

Page 2: ......

Page 3: ...ERSQ 011 014 016 AAV1 17 2 2 ERRQ 011 014 016 AAY1 ERSQ 011 014 016 AAY1 19 2 3 EKHBRD 011 014 016 AA V1 Y1 21 2 4 EKHBRD 011 014 016 AB AC V1 Y1 23 2 5 EKHTS 200 260 A AB AC 24 2 6 EKHTSU 200 260 A AB AC 26 Part 4 Electrical Circuit 29 1 Switch Box Layout Indoor Unit EKHBRD 30 2 PCB Layout for EKHBRD 011 014 016 AA AB AC V1 Y1 34 2 1 Main PCB A1P 34 2 2 Control PCB A3P 36 2 3 Inverter PCB A4P 38 ...

Page 4: ...t Test and Vacuum Drying 80 1 3 Additional Refrigerant Charge 81 1 4 Operation when Power is Turned On 85 2 Outdoor Unit PC Board Layout 86 3 Field Setting 87 3 1 Field Setting from remote control 87 3 2 Field Setting from Outdoor Unit 115 Part 7 Troubleshooting 127 1 Symptom based Troubleshooting 129 2 Troubleshooting by Remote Control 131 2 1 The INSPECTION TEST Button 131 2 2 Self diagnosis by ...

Page 5: ...77 3 27 J3 Indoor Unit Malfunction of Discharge Pipe Thermistor R6T 178 3 28 J5 Outdoor Unit Malfunction of Thermistor R3T R5T for Suction Pipe 1 2 179 3 29 J5 Indoor Unit Malfunction of Thermistor R7T for Liquid R 134a 180 3 30 J6 Outdoor Unit Malfunction of Thermistor R6T for Outdoor Unit Heat Ex changer181 3 31 J7 Outdoor Unit Malfunction of Thermistor R7T for Outdoor Unit Liquid Pipe182 3 32 J...

Page 6: ...Unit 216 3 62 UF System is not Set yet 217 3 63 UH Malfunction of System Refrigerant System Address Undefined 218 Part 8 Appendix 223 1 Piping Diagrams 224 1 1 Outdoor Unit 224 1 2 Indoor Unit 226 1 3 Switch Box Layout 229 2 Wiring Diagrams 233 2 1 Outdoor Unit 233 2 2 Field Wiring Connection Diagram 237 2 3 Indoor Unit 238 3 Thermistor Resistance Temperature Characteristics 251 4 Pressure Sensor ...

Page 7: ...ESIE09 08A Table of Contents v 1 3 Service Tools 283 Index i Drawings Flow Charts iii ...

Page 8: ...orking on the equipment that is connected to a power supply can cause an electrical shock If it is necessary to supply power to the equipment to conduct the repair or inspecting the circuits do not touch any electrically charged sections of the equipment Be careful as the capacitors top surfaces can hold up to 220V If the refrigerant gas discharges during the repair work do not touch the dischargi...

Page 9: ...mpt to modify the equipment The use of inappropriate parts or tools can cause an electrical shock excessive heat generation or fire When relocating the equipment make sure that the new installation site has sufficient strength to withstand the weight of the equipment If the installation site does not have sufficient strength and if the installation work is not conducted securely the equipment can ...

Page 10: ...install the equipment in a place where there is a possibility of combustible gas leaks If a combustible gas leaks and remains around the unit it can cause a fire Be sure to install the packing and seal on the installation frame properly If the packing and seal are not installed properly water can enter the room and wet the furniture and floor For integral units only Warning Check to make sure that...

Page 11: ... the indoor unit after the repair Faulty drainage can cause the water to enter the room and wet the furniture and floor Caution Icon Type of Information Description Note Note A note provides information that is not indispensable but may nevertheless be valuable to the reader such as tips and tricks Caution Caution A caution is used when there is danger that the reader through incorrect manipulatio...

Page 12: ...high temperature air to water heat pump Daikin offers a wide range of models to respond to the residential heating market We are confident that customers will be able to find the models that best suit their needs This service manual contains information regarding the servicing of Daikin Altherma HT R 410A R 134a Heat Pump System August 2009 After Sales Service Division ...

Page 13: ...ESIE09 08A General Information 1 Part 1 General Information 1 Model Names of Indoor Outdoor Units Tanks 2 ...

Page 14: ...es of Indoor Outdoor Units Tanks Indoor Units Outdoor Units Type Model Name Version Power Supply EKHBRD 011 AA AB AC V1 014 016 EKHBRD 011 AA AB AC Y1 014 016 Type Model Name Version Power Supply ERRQ 011 AA V1 014 016 ERRQ 011 AA Y1 014 016 ERSQ 011 AA V1 014 016 ERSQ 011 AA Y1 014 016 ...

Page 15: ...ESIE09 08A Model Names of Indoor Outdoor Units Tanks General Information 3 Tank Model Name Version EKHTS 200 AA AB AC EKHTS 260 EKHTSU 200 AA AB AC EKHTSU 260 ...

Page 16: ...Model Names of Indoor Outdoor Units Tanks ESIE09 08A 4 General Information ...

Page 17: ...ESIE09 08A Specifications 5 Part 2 Specifications 1 Specifications 6 1 1 Outdoor Units 6 1 2 Indoor Unit 8 ...

Page 18: ...45 1345 1345 Width mm 900 900 900 Depth mm 320 320 320 Packing Height mm 1524 1524 1524 Width mm 980 980 980 Depth mm 420 420 420 Weight Unit kg 120 120 120 Packed Unit kg 130 130 130 Packing Material Cardboard Wood EPS Cardboard Wood EPS Cardboard Wood EPS Weight kg 8 8 8 Heat Exchanger Specifications Length mm 857 857 857 Nr of Rows 2 2 2 Fin Pitch mm 2 2 2 Nr of Passes 10 10 10 Face Area m 1 13...

Page 19: ...evices inverter Inverter overload protector Inverter overload protector Inverter overload protector Safety Devices pcb PC board fuse PC board fuse PC board fuse Standard Accessories Item Installation manual Installation manual Installation manual Quantity 1 1 1 Design pressure high pressure side bar 40 40 40 Notes 1 for details see operation range TW drawing Power Supply Name ER S R Q 011 014 016 ...

Page 20: ...W 70 C LW 80 C ΔT 10 C Ambient conditions 7 CDB 6 CWB Condition 3 EW 30 C LW 35 C ΔT 5 C Ambient conditions 7 CDB 6 CWB Remark This data is only valid in combination of indoor unit with ER R S Q outdoor unit Indoor units EKHBRD011AA AB AC V1 Y1 EKHBRD014AA AB AC V1 Y1 EKHBRD016AA AB AC V1 Y1 AA AB AC AA AB AC AA AB AC Casing Colour Metallic Grey Metallic Grey Metallic Grey Material pre coated shee...

Page 21: ... Water circuit Piping connections diameter inch G 1 1 4 female G 1 1 4 female G 1 1 4 female Piping inch 1 1 1 Safety valve bar 3 3 3 Manometer Y N Y Y Y Drain valve Fill valve Y N Y Y Y Shut off valve Y N Y Y Y Air purge valve Y N Y Y Y Heating water system minimum water volume l 20 20 20 Heating water system maximum water volume l 400 400 400 Refrigerant Circuit Gas side diameter mm 15 9 15 9 15...

Page 22: ...r unit Quantity 2 Remark F1 F2 Power Supply Intake Both indoor unit and outdoor unit Notes 1 European International Technical Standard setting the limits for harmonic currents produced by equipment connected to public low voltage systems with input current 16A and 75A per phase 2 In accordance with EN IEC 61000 3 11 6 it may be necessary to consult the distribution network operator to ensure that ...

Page 23: ...2 1 1 Outdoor Unit 12 1 2 Indoor Unit 14 2 Functional Parts Layout 17 2 1 ERRQ 011 014 016 AAV1 ERSQ 011 014 016 AAV1 17 2 2 ERRQ 011 014 016 AAY1 ERSQ 011 014 016 AAY1 19 2 3 EKHBRD 011 014 016 AA V1 Y1 21 2 4 EKHBRD 011 014 016 AB AC V1 Y1 23 2 5 EKHTS 200 260 A AB AC 24 2 6 EKHTSU 200 260 A AB AC 26 ...

Page 24: ...H HP pressure switch For INV compressor In order to prevent the increase of high pressure when a malfunction occurs this switch is activated at high pressure of 4 0 MPa or more to stop the compressor operation K Pressure regulating valve 1 Receiver to discharge pipe This valve opens at a pressure of 4 0 MPa for prevention of pressure increase thus resulting in no damage of functional parts due to ...

Page 25: ...T R7T ACCUMULATOR HEATING STOP VALVE WITH SERVICE PORT ON FIELD PIPING SIDE ø 7 9MM FLARE CONNECTION DEFROST FANS M1F M2F SP p SERVICE PORT 4 WAY VALVE Y1S CAPILLARY TUBE CAPILLARY TUBE HIGH PRESSURE SENSOR S1NPH HIGH PRESSURE SWITCH S1PH SOLENOID VALVE Y2S SOLENOID VALVE Y3S DOUBLE PIPE HEAT EXCHANGER PRESSURE REGULATING VALVE SV SV SP COMPRESSOR M1C Low pressure sensor S1NPL A B C D K G H I F J ...

Page 26: ...during defrost operation G K1E Electronic expansion valve Used to regulate the refrigerant flow of R 410A H K2E Electronic expansion valve Used to regulate the refrigerant flow of R 134a I E1HC Crankcase heater Used to prevent migration when the unit is OFF and condensation of refrigerant in the crankcase of compressor J M1P DC inverter pump Used to regulate water flow to achieve a constant ΔT K Q...

Page 27: ...ECK VALVE M1C E1HC R6T Y1R M K1S R5T Q2L R4T M1P K2S K1E K2E R3T R7T B1PL B1PH S1PH ACCUMULATOR CHECK VALVE KHTS 200 270 G 1 1 4 female WATER OUTLET STANDARD WATER SIDE 3 WAY VALVE REFRIGERANT SIDE OUTDOOR UNIT SERVICE PORT 5 16 SERVICE PORT 5 16 R Q011 016 FIELD INSTALLATION DELIVERED WITH OPTION DOMESTIC HOT WATER TANK G 1 1 4 female AIR PURGE SHUT OFF VALVE SHUT OFF VALVE FIELD PIPING ø15 9 C 1...

Page 28: ...Refrigerant Circuit ESIE09 08A 16 Refrigerant Circuit EKHBRD 011 014 016 AB AC V1 Y1 ...

Page 29: ... heater Standard for ERRQ Optional for ERSQ Y2S S1NPL Solenoid valve S1NPH High pressure sensor Y1S 4 way valve Service port Accumulator Service port liquid Service port gas Compressor Oil separator Low pressure sensor R2T Discharge thermistor Y1E Electric expansion valve Y3E Electric expansion valve E1HC Crankcase heater S1HP High pressure switch Y3S Solenoid valve ...

Page 30: ...out ESIE09 08A 18 Refrigerant Circuit Back view R6T Subcool thermistor R3T Suction 1 thermistor R8T Liquid pipe 2 thermistor R4T Coil thermistor R7T Liquid pipe 1 thermistor R1T Ambient thermistor R5T Suction 2 thermistor ...

Page 31: ...d for ERRQ Optional for ERSQ Y2S S1NPH Solenoid valve Y3S Solenoid valve S1NPL Low pressure sensor Y1S 4 way valve Y1E Electronic expansion valve Y3E Electronic expansion valve Service port Accumulator Service port gas Oil separator Service port liquid Compressor High pressure sensor S1PH High pressure switch R2T Discharge thermistor E1HC Crankcase heater ...

Page 32: ...Functional Parts Layout ESIE09 08A 20 Refrigerant Circuit Back view R3T R6T Suction thermistor R1T Ambient thermistor R8T Liquid pipe thermistor Subcool gas pipe thermistor R7T Liquid pipe thermistor ...

Page 33: ...ESIE09 08A Functional Parts Layout Refrigerant Circuit 21 2 3 EKHBRD 011 014 016 AA V1 Y1 Front view Top view 1 2 A 3 4 5 6 10 15 14 13 12 11 9 8 7 16 19 20 18 17 E ...

Page 34: ...tor R 134a 7 Solenoid valve 24 Drain 8 Expansion vessel 12 l 25 Electronic expansion valve R 134a 9 DC inverter pump 26 Electronic expansion valve R 410A 10 Pressure relief valve 27 Refrigerant gas connection R 410A 11 Manometer 28 Refrigerant liquid connection R 410A 12 High pressure service port R 134a A R6T Discharge thermistor 13 Low pressure service port R 134a B R7T Liquid thermistor R 134a ...

Page 35: ...eat exchangers 16 Service ports R134a 5 Refrigerant liquid connection R410A 17 Compressor R 134a 6 Refrigerant gas connection R410A 18 Accumulator 7 Shut off valves 19 3 way valve option with EKHTS tank 8 Water inlet connection 20 4 way valve 9 Water outlet connection 21 2 way valve 10 Drain valve 22 Thermal cut out 11 Water filter 23 Electronic expansion valve 12 Expansion vessel 12l 24 T piece o...

Page 36: ...rts Layout ESIE09 08A 24 Refrigerant Circuit 2 5 EKHTS 200 260 A AB AC Front view Bottom view Tank sensor Tank sensor Hot water out Cold water in Coil in from EKHBRD Coil out towards EKHBRD Recirculation connection ...

Page 37: ...ESIE09 08A Functional Parts Layout Refrigerant Circuit 25 Top view Worm s eye view Recirculation connection Bottom adaptor Tank sensor Cold water in Coil out to EKHBRD Hot water out Coil in from EKHBRD ...

Page 38: ...Functional Parts Layout ESIE09 08A 26 Refrigerant Circuit 2 6 EKHTSU 200 260 A AB AC Front view Tank sensor ...

Page 39: ...oil in from EKHBRD Recirculation connection Pressure relief connection Coil out towards EKHBRD Recirculation pipe Recirculation connection Hot water out connection Pressure relief connection Anode Heat exchanger Cold water in connection Coil out connection towards EKHBRD Hot water pipe Coil in connection from EKHBRD ...

Page 40: ...Functional Parts Layout ESIE09 08A 28 Refrigerant Circuit ...

Page 41: ...B Layout for EKHBRD 011 014 016 AA AB AC V1 Y1 34 2 1 Main PCB A1P 34 2 2 Control PCB A3P 36 2 3 Inverter PCB A4P 38 2 4 Filter PCB A6P 41 2 5 QA PCB A5P 43 2 6 Inverter Control PCB Three Phase A4P 44 2 7 Inverter PCB Three Phase A5P 46 2 8 Digital I O PCB Option PCB A7P 48 2 9 Demand PCB Option PCB A8P 50 ...

Page 42: ...Switch Box Layout Indoor Unit EKHBRD ESIE09 08A 30 Refrigerant Circuit 1 Switch Box Layout Indoor Unit EKHBRD EKHBRD 011 014 016 AAV1 EKHBRD 011 014 016 AAY1 ...

Page 43: ...I O PCB A7P Optional 8 Demand PCB A8P Optional 9 Terminal block X1M Main power supply 10 Terminal block X2M AC connections 11 Terminal block X3M DC connections 12 DC connector X1Y 13 Pump connector X2Y 14 AC connectory X3Y 15 Cable tie mountings 16 Power wiring entry 17 AC field wiring entry 18 DC field wiring entry 19 Compressor cable entry 20 Interface relay K1A 21 Wiring bridges 22 Fuse F1 Only...

Page 44: ...Switch Box Layout Indoor Unit EKHBRD ESIE09 08A 32 Refrigerant Circuit EKHBRD 011 014 016 AB AC V1 EKHBRD 011 014 016 AB AC Y1 ...

Page 45: ...I O PCB A7P Optional 8 Demand PCB A8P Optional 9 Terminal block X1M Main power supply 10 Terminal block X3M DC connections 11 Terminal block X2M AC connections 12 DC connector X1Y 13 Pump connector X2Y 14 AC connectory X3Y 15 Cable tie mountings 16 Power wiring entry 17 AC field wiring entry 18 DC field wiring entry 19 Compressor cable entry 20 Interface relay K1A 21 Wiring bridges 22 Fuse F1 Only...

Page 46: ...lack X25A white X65A X20A X38A SS1 X70A X30A white X23A blue X15A white X24A black X18A red X12A yellow X17A yellow X16A white X36A red white X7A white X50A white X85A yellow X6A white X33A white X35A white X19A blue X60A Fuse green 3 15A 250V white white white yellow X27A X23A X30A X15A X18A X16A X36A X24A X12A X70A X20A X38A X65A X60AX19AX35A SS1 NORMAL EMG X33A X6A X85A X50A X17A X7A X25A ...

Page 47: ...2A R4T returning water thermistor Yellow X15A White X16A White X17A R5T leaving water thermistor Yellow X18A R3T liquid thermistor R 410A Red X19A White X20A M1P DC inverter pump White X23A Blue X24A Black X25A White X27A X803A of PCB A5P Black X30A X3M 3 4 F1 F2 7 8 P1 P2 White X33A X2A of PCB A7P White X35A X10A of PCB A3P White X36A Red X38A White X50A White X60A Blue X65A White X70A X15A of PC...

Page 48: ...single phase Control PCB A3P X11A yellow X12A blue X25A white X13A white X14A white X15A X1A blue white X23A green X8A pink X7A black X5A yellow X4A orange X3A white X21A black X16A yellow X10A white X9A white Fuse 3 15A 250V X11A X21A X10A X9A EB0750 Fuse 3 15A 250V X3A X4A X5A X7A X8A X23A X1A X12A X25A X13A X14A ...

Page 49: ... Connector Color Connected to X1A Blue X3A Orange X2M 12 13 X4A Yellow X5A Black X2M 3 4 X7A Pink 2 way valve R 410A X8A Green Bridge with filter capacitors X9A White X10A White X35A of PCB A1P 16V power supply X11A Yellow R2T 1 X12A Blue X13A White X14A White X3M 7 8 2 X15A Black X15A of PCB A1P X16A Yellow Bridge X21A White X23A White X2M 14 15 16 X25A White ...

Page 50: ...ite X32A red X17A blue X18A blue X12A white X11A white X13A white X21A white X5A white X9A white X6A X106A red X41A blue X107A white X111A white LE white P orange Fuse 1 5A 250V for 111F 112F X25A blue X27A pink X28A grey X77A yellow LD orange X51A blue HAP LED Fuse 2 6 3A 250V for Y1S ECHC red LC blue NC red U white V blue W grey N ...

Page 51: ...11A White X12A Blue R6T by connector X1Y 13 14 R7T by connector X1Y 15 16 Discharge liquid R 134a thermistor X13A White X17A Red B1PH by connector X1Y 17 18 19 High pressure sensor X18A Blue B1PL by connector X1Y 20 21 22 Low pressure sensor X21A White K2E by connector X1Y 25 26 27 28 29 30 Electronic expansion valve X25A Blue Y1R by connector X3Y 7 8 4 way valve X27A Pink M1F M2F Switch box cooli...

Page 52: ...1PH Q2L X106A Red X107A White X111A White R8T Fin thermistor HAP LED Indication power supply Fuse 1 5A 250V for M1F M2F Fuse 2 6 3A 250V for Y1S ECHC LC Red LB of PCB A6P Filter PCB LD Orange R1L by connector X4Y 1 2 Reactor LE White NC Blue NB of PCB A6P N Grey C1 Capacitor C1 P Orange C1 U Red U of M1C Compressor V White V of M1C W Blue W of M1C ...

Page 53: ...ut for EKHBRD 011 014 016 AA AB AC V1 Y1 Refrigerant Circuit 41 2 4 Filter PCB A6P Filter PCB single phase LB blue LA red earth green cable white connector Connector of LF NF white NB blue LB red LF NF 6 3A 250V Fuse F1U ...

Page 54: ...frigerant Circuit Filter PCB A6P Legend NB LB NA LA E LF NF F1U Connector Color Connected to function LA Red X1M L N Power supply 1 230V NA Blue LB Red LC NC Inverter PCB NB Blue LF Red X2M 10 11 via V5C NF Blue E Green cable white connector Earth F1U 6 3A 250V fuse ...

Page 55: ...A5P QA PCB single phase QA PCB A5P Legend white X809A X801A white Fuse F3U 6 3A 250V Green black X803A X809A X801A X803A F3U E3 Connector Color Connected to function X801A White X2M 8 9 by V5C X803A Black X27A of main PCB A1P X809A White X9A of invertor PCB A4P F3U Fuse 6 3A 250V E3 Green Earth ...

Page 56: ... Y1 ESIE09 08A 44 Refrigerant Circuit 2 6 Inverter Control PCB Three Phase A4P Inverter control PCB three phase X6A X21A X11A X12A X41A X13A X17A X5A X4A X9A F4U F3U X8A L21A L11A F1U F2U F5U N1A L31A X25A X28A X27A X77A NA L3A L2A L1A X803A X18A ...

Page 57: ...A L31B filter PCB N1A N1B filter PCB X4A Ivory Inverter PCB X104A X5A White Inverter PCB X105A X6A White X8A White Inverter PCB X108A X9A Orange Inverter PCB X109A X11A Ivory R1T X12A Blue R2T R3T R4T and R5T X13A Ivory R6T X17A Red S1NPH X18A Blue S1NPL X21A Ivory EV Y1E X25A Blue Y1S X27A Pink Y3S X28A Grey E1HC X41A Blue X77A Yellow ENE 200V X803A Black F1U F2U Fuse 31 5A 250V F3U F4U Fuse 6 3A...

Page 58: ...KHBRD 011 014 016 AA AB AC V1 Y1 ESIE09 08A 46 Refrigerant Circuit 2 7 Inverter PCB Three Phase A5P Inverter PCB three phase X105A X111A X142A X141A TP1 TP2 X107A X106A X108A X32A X104A L12A L32A L22A X191A X109A U V W ...

Page 59: ... 2 L32A Reactor phase 3 U Compressor phase U V Compressor phase V W Compressor phase W X32A White HPS X104A Ivory Control PCB X4A X105A White Control PCB X5A X106A Red Fan motor M1F X107A Ivory Fan motor M2F X108A White Control PCB X8A X109A Orange Control PCB X9A X111A White Fin thermistor X141A White X142A White X191A Blue Fan reactor T1 Test pin DC T2 Test pin DC ...

Page 60: ...AB AC V1 Y1 ESIE09 08A 48 Refrigerant Circuit 2 8 Digital I O PCB Option PCB A7P Digital I O PCB option PCB A7P Digital I O PCB option PCB A7P X1 X2A CN2 X2 X3 X4 YC X1A Y1 X1A X1M X2M F1U ON YC Y1 Y2 Y3 Y4 OFF SS1 F2U X2A CN2 X1 X2 X3 X4 ...

Page 61: ...nt Circuit 49 Legend Connector Color Connected to function X1A White X2M 6 7 X2A White X33A of main PCB A1P X1 Cooling heating ON OFF output optional power supply X2 X3 Alarm output optional power supply X4 Y1 YC Domestic hot water mode ON OFF output Y3 YC Solar priority ...

Page 62: ...tation 1 used in combina tion with 5 mixing station 2 used in combina tion with 5 used together with 1 2 3 and or 4 X80A Connector Color Connected to function X80A White X85A of main PCB A1P 1 5 2 core cable for EKRTW on X1M H COM of PCB A10P 1 5 2 core cable for EKRTR on X1M H COM of PCB A11P X2M 6 7 to X2M L N of A11P X1M 1 3 of A10P to R2T 2 5 2 core cable for BUH 3 5 2 core cable for mixing st...

Page 63: ...ESIE09 08A PCB Layout for EKHBRD 011 014 016 AA AB AC V1 Y1 Refrigerant Circuit 51 ...

Page 64: ...PCB Layout for EKHBRD 011 014 016 AA AB AC V1 Y1 ESIE09 08A 52 Refrigerant Circuit ...

Page 65: ...g Operation 59 3 3 Pump down Residual Operation 60 3 4 Stopping Operation 61 4 Protection Control 62 4 1 High Pressure Protection Control 62 4 2 Low Pressure Protection Control 64 4 3 Discharge Pipe Protection Control 66 4 4 Inverter Protection Control 67 5 Other Control 69 5 1 Heating Operation Prohibition 69 5 2 Inverter Fan Control Switch Box Fan 69 5 3 Crankcase Heater 69 6 Outline of Control ...

Page 66: ...to startup Restart standby Compressor stop Indoor unit stop or thermostat OFF Pump down residual operation Malfunction Standby Heating startup control Indoor unit stop or thermostat OFF Electronic expansion valve PI control Heating operation Malfunction Standby Defrost IN conditions are met Operation mode change In the event indoor unit stops or the thermostat turns OFF while in defrosting operati...

Page 67: ...All steps possible mainly STEP 7 OR 8 Four way valve ON Main electronic expansion valve EV1 PI control Subcooling electronic expansion valve EV3 PI control Hot gas bypass valve SVP OFF This valve turns on with low pressure protection control Actuator Operation Remarks Compressor Compressor PI control Used for high pressure protection control low pressure protection control discharge pipe temperatu...

Page 68: ...116 0Hz 27 175 0Hz 8 62 0Hz 71 0Hz 18 122 0Hz 28 180 0Hz 9 68 0Hz 78 0Hz 19 128 0Hz 29 185 0Hz 10 74 0Hz 20 134 0Hz 30 190 0Hz STEP INV STEP INV STEP INV 1 40 0Hz 11 98 0Hz 21 158 0Hz 2 46 0Hz 12 104 0Hz 22 164 0Hz 3 52 0Hz 13 110 0Hz 23 170 0Hz 4 57 0Hz 14 116 0Hz 24 174 0Hz 5 62 0Hz 15 122 0Hz 25 182 0Hz 6 68 0Hz 16 128 0Hz 26 188 0Hz 7 74 0Hz 17 134 0Hz 27 194 0Hz 8 80 0Hz 18 138 0Hz 28 200 0Hz...

Page 69: ...ooling heat exchanger Electronic Expansion Valve K1E Control Indoor Unit Carries out the electronic expansion valve K1E PI control to maintain the condensor outlet subcooled degree SC at constant during heating operation to make maximum use of the indoor unit heat exchanger condensor 2 4 Electronic Expansion Valve PI Control R 134a circuit Electronic Expansion Valve K2E Control Indoor Unit Carries...

Page 70: ... A thermostat ON demand will activate the outdoor fan followed by the outdoor compressor and finally indoor compressor Outdoor Thermostat ON Pressure equalization control prior to startup Startup control STEP1 STEP2 Compressor 0 Hz 57 Hz Unload 57 Hz Unload 2 steps 20 sec until Pc Pe 0 39MPa is achieved Outdoor unit fan From starting 1 min STEP 7 1 3 min STEP 3 3 5 min OFF STEP8 STEP8 Four way val...

Page 71: ... defrost operation is started referring following conditions Outdoor heat exchanger heat transfer co efficient Temperature of heat exchange Tb Tdef Timer 25 min the minimum In addition outdoor heat exchanger co efficient is derived from Tc Te and the compressor load Tdef can vary but is at least 10 C Fan defrosting When compressor stops 80 sec at low RPM At start up compressor 30 sec at 950 RPM st...

Page 72: ...ity Therefore the pump down residual operation is performed to collect the refrigerant in the heat exchanger when the compressor is down 3 3 1 Pump down Residual Operation in Heating Operation R 410A Actuator Pump down residual operation Compressor 124 Hz Full load Outdoor unit fan STEP7 Four way valve ON Main electronic expansion valve EV1 0 pls Subcooling electronic expansion valve EV3 0 pls Hot...

Page 73: ...ve Keep former condition Main electronic expansion valve EV1 0 pls Subcooling electronic expansion valve EV3 0 pls Hot gas bypass valve SVP OFF Ending conditions Request for space heating OR hot water production Actuator Operation Compressor OFF 4 way valve Keep former condition Pump OFF Electronic expansion valve K1E R 410A 0 pls Electronic expansion valve K2E R 134a 0 pls Ending conditions Reque...

Page 74: ...g operation R 410A High pressure drop Pc 3 04MPa After 10 sec Pc 3 04MPa Pc 2 94MPa Pc 3 64MPa Keeping the current step After 60 sec High pressure not limited High pressure limited Pc HP pressure sensor detection value Pc 2 89MPa INV upper limit frequency 1 step down from current compressor frequency INV upper limit frequency 1 step up from current compressor frequency High pressure standby When o...

Page 75: ...pressure limited INV upper limit frequency 1 step up from current compressor frequency Pc HP pressure sensor detection value INV upper limit frequency 1 step down from current compressor frequency When occurring 3 times within 60 minutes HPS is activated without high pressure standby thus outputting the malfunction code E3 Pc 2 7MPa during defrost compressor stop Pc 2 85MPa High pressure standby o...

Page 76: ...MPa or After 10 sec Pe 0 17MPa Pe 0 17MPa Pe 0 20MPa Pe 0 07MPa Current step limited After 15 sec Low pressure not limited Low pressure limited Pe 0 12MPa Pe 0 17MPa Hot gas SVP OFF Hot gas SVP ON Pe LP pressure sensor detection value INV upper limit frequency 3 step down from current compressor frequency INV upper limit frequency 1 step up from current compressor frequency Low pressure standby Wh...

Page 77: ...sure not limited Low pressure limited Pe 0 13MPa INV 20 RPS Pe LP pressure sensor detection value INV upper limit frequency 3 step down from current compressor frequency INV upper limit frequency 1 step up from current compressor frequency INV max upper limit frequency 3 step up from current compressor frequency Low pressure standby When occurring 3 times within 30 min the malfunction code E4 is o...

Page 78: ...pper limit frequency 1 step up from current compressor frequency Discharge pipe temperature standby When occurring 3 times within 100 minutes the malfunction code F3 is output Discharge pipe protection control not limited HTdi 115 C HTdi min frequency frequency match HTdi 115 C or HTdi 135 C HTdi 120 C for 10 min or more or HTdi 100 C within 10 min after defrosting and After 30 sec After 20 sec or...

Page 79: ...t frequency 1 step down from current compressor frequency Inverter current 12A Inverter current ⱕ 12A continues for 3 min INV upper limit frequency 1 step up from current compressor frequency When occurring 4 times within 60 min the malfunction code L8 is output Not limited Limited Inverter current see table Inverter current 13 1A continues for 260 sec and compressor stop 10 sec Matching of freque...

Page 80: ...ntinues for 3 min When occurring 4 times within 60 min the malfunction code L4 is output INV upper limit frequency 1 step up from current compressor frequency Not limited Limited Tfin see value H in table INV upper limit frequency max Hz and H L 10 sec Matching of frequency and or 15 sec Status quo Without conditions Tfin see value L in table INV upper limit frequency 1 step down from current comp...

Page 81: ...ng is possible Heating for domestic hot water is possible till 35 C ambient temperature For more details see chapter of settings 5 2 Inverter Fan Control Switch Box Fan 5 3 Crankcase Heater Cooling fan OFF Cooling fan ON Compressor ON Tfin 50 C Tfin 30 C Compressor OFF Crankcase heater OFF Crankcase heater ON Compressor OFF Tdi 70 C Tdi 75 C Compressor ON OR OR AND Tdi error ...

Page 82: ...y active when the unit is in thermo OFF condition Start condition AND OR Outdoor ambient temperature 4 C Leaving or return water temperature 7 C AND OR depending of setting 8 04 for further details see chapter of setting Operation Pump will operate and if leaving OR return water 5 C for 5 minutes the unit will start up the freeze up prevention function to prevent too low temperatures ...

Page 83: ...nction can only be activated by the schedule timer button and this icon should be led Remote controller leaving water temperature control When the reheat temperature is reached the further heat up till storage temperature of the domestic hot water tank will be decided by the running timers which are programmed by the installer 1 Reheat operation When requesting space heating and domestic water hea...

Page 84: ... system goes back to space heating mode H Domestic hot water reheat minimum temperature b 00 J Domestic hot water reheat maximum temperature b 01 M Simultaneous demand N ONLY space heating request ON ON OFF OFF A Operation Space heating Domestic water heating B Domestic hot water storage thermo on request C Domestic hot water tank temperature D Leaving water thermo on request F Domestic hot water ...

Page 85: ... position then space heating will start again During the reheat operation the system does not take care about the room temperature This means that during simultaneous demand the reheat operation has priority over the room temperature A Operation Space heating Domestic water heating B Domestic hot water reheat thermo on request C Domestic hot water tank temperature D Room temperature thermo on requ...

Page 86: ...off the room temperature This means that during simultaneous demand the space only will be heated during the intervals of domestic water production A Operation Space heating Domestic water heating B Domestic hot water storage thermo on request C Domestic hot water tank temperature D Room temperature thermo on request E Remote controller room temperature F Domestic hot water lower limit temperature...

Page 87: ...ay valve will switch back to original position then space heating will start again During the reheat operation the system does not take care about the room temperature This means that during simultaneous demand the reheat operation has priority over the room temperature A Operation Space heating Domestic water heating B Domestic hot water reheat thermo on request C Domestic hot water tank temperat...

Page 88: ...d when room temperature is more than 0 5 C lower as set point and set point J is reached A Operation Space heating Domestic water heating B Domestic hot water storage thermo on request C Domestic hot water tank temperature D Room temperature thermo on request E Remote controller room temperature F Domestic hot water lower limit temperature G Domestic hot water upper limit temperature maximum possi...

Page 89: ...Procedure and Outline 78 1 2 Air Tight Test and Vacuum Drying 80 1 3 Additional Refrigerant Charge 81 1 4 Operation when Power is Turned On 85 2 Outdoor Unit PC Board Layout 86 3 Field Setting 87 3 1 Field Setting from remote control 87 3 2 Field Setting from Outdoor Unit 115 ...

Page 90: ... conduct the initial test operation after installation 1 1 1 Check Work Prior to Turn Power Supply On Check on refrigerant piping V3180 Check on amount of refrigerant charge Check air tight test and vacuum drying Check on water piping Check the below items Power wiring Control transmission wiring between units Earth wire ...

Page 91: ...s before starting operation to protect compressors Close outside panels of the outdoor unit Wait until initialization period is over up to 12 min Can be known by checking leds on outdoor PCB see Field Settings from Outdoor unit for details Car ry out the test run as desc ribed in the installation manual of the indoor unit Carry out field setting if necessary ...

Page 92: ...will freeze when the piping gets cold and or lead to corrosion of flared joints soap water may contain ammonia which causes a corrosive effect between the brass flare nut and the copper flare 3 Discharge all nitrogen gas Pressurize the liquid and gas pipes to 4 0 MPa 40 bar do not pressurize more than 4 0 MPa 40 bar If the pressure does not drop within 24 hours the system passes the test If the pr...

Page 93: ... slowly Always use protective gloves and protect your eyes when charging refrigerant When performing service on the unit requiring the refrigerant system to be opened refrigerant must be evacuated according to local regulations When the power is on please close the front panel when leaving the unit To avoid compressor breakdown Do not charge the refrigerant more than the specified amount This outd...

Page 94: ...rging port e g onto the inside of the service cover 1 3 2 Procedures for adding refrigerant How to connect the tank Caution Automatic refrigerant charging is NOT POSSIBLE Make sure to turn ON the power 6 hours before starting the operation This is necessary to warm the crankcase by the electric heater total refrigerant charge outdoor unit Contains fluorinated greenhouse gases covered by the Kyoto ...

Page 95: ...t of the unit Do NOT use the service ports located on the stop valve since vacuum drying can not be performed properly from these ports Outdoor units have 1 port on the piping It is between the heat exchanger and the 4 way valve Table Total charging amount unit kg 2 After the vacuum drying is finished open valve A 5 and charge the additional refrigerant in its liquid state through the service port...

Page 96: ...z button 4 times so the t icon will be displayed 3 Perform the test as follows when no action is performed the user interface will return to normal mode after 10 seconds or by pressing the z button once To test the space heating operation push the y button to start the test run operation 4 The test run operation will end automatically after 30 minutes or when reaching the set temperature The test ...

Page 97: ...d In this case the unit cannot be run for up to 12 minutes to automatically set the address indoor outdoor address etc Status Outdoor unit Test lamp H2P H8P Blinks Can also be set during operation described above Indoor unit If ON button is pushed during operation described above the UH malfunction indicator blinks Returns to normal when automatic setting is complete Outdoor unit Test lamp H2P H8P...

Page 98: ... ON OFF RETURN Test Error Changeover between cooling and heating Individual Batch master Batch slave Demand Low noise DIP switches DS1 1 and DS1 2 Sets the address again when the wiring is changed or an indoor unit is added Used at field set Changes the set mode The LED indicator status shown at left indicates the status at factory set LED indicator status Turn off Turn on Flicker Turn on or off H...

Page 99: ...l EKRUAHTA BRC21A51 EKRUAHTB BRC21A52 To change one or more field settings proceed as follows 1 Press the z button for a minimum of 5 seconds to enter FIELD SET MODE The icon c will be displayed The current selected field setting code is indicated b with the set value displayed to the right a 2 Press the bi button to select the appropriate field setting first code 8 3 Press the bj button to select...

Page 100: ...etting 8 00 the other field settings of group 8 8 01 8 02 8 03 8 04 will be saved as well 3 Before shipping the set values have been set as shown in the field settings table 4 When exiting FIELD SET MODE 88 may be displayed on the remote controller LCD while the unit initializes itself 5 When running through the field settings you may notice that there are some more field settings as mentioned in ...

Page 101: ...n start time 23 00 0 00 23 00 1 00 hour 02 Setback operation stop time 5 00 0 00 23 00 1 00 hour 3 Weather dependent set point 00 Low ambient temperature Lo_A 10 20 5 1 C 01 High ambient temperature Hi_A 15 10 20 1 C 02 Set point at low ambient temperature Lo_Ti 70 25 80 1 C 03 Set point at high ambient temperature Hi_Ti 45 25 80 1 C 4 Disinfection function 00 Status disinfection operation 1 ON 0 ...

Page 102: ...mpensation value 0 5 5 0 5 C 02 Thermo ON OFF admission 0 5 5 0 5 C A Option setup 00 Not applicable Do not change the default value 0 0 2 1 01 Not applicable Do not change the default value 0 0 2 1 02 Set point required temperature difference for leaving and returning water 10 5 15 1 C 03 Set point multiple set point 1 required temperature value 35 25 80 1 C 04 Set point multiple set point 2 requ...

Page 103: ...nt minimum time for domestic water heating 10 5 20 1 01 Set point maximum time for domestic water heating 30 10 60 5 02 Set point interval minimum stop time of domestic water heating 15 5 30 5 E Service mode 00 Vacuum mode 0 0 1 01 Not applicable Do not change the default value 0 OFF 0 1 02 Not applicable Do not change the default value 0 OFF 0 1 03 Not applicable Do not change the default value 1...

Page 104: ... temperature Lo_A 10 20 5 1 C 01 High ambient temperature Hi_A 15 10 20 1 C 02 Set point at low ambient temperature Lo_Ti 70 25 80 1 C 03 Set point at high ambient temperature Hi_Ti 45 25 80 1 C 4 Disinfection function 00 Status disinfection operation 1 ON 0 1 01 Disinfection operation day selection Fri Mon Sun 02 Disinfection operation start time 23 00 0 00 23 00 1 00 hour 5 Automatic setback and...

Page 105: ...mperature 45 35 75 1 C 02 Status weather dependent domestic water heating 1 ON 0 1 03 Set point storage temperature 70 45 75 1 C 04 Automatic maximum domestic hot water storage temperature 70 55 75 1 C C Leaving water temperature limits 00 Set point leaving water maximum temperature 80 37 80 1 C 01 Set point leaving water minimum temperature 25 25 37 1 C 02 Not applicable Do not change the default...

Page 106: ...me thermistor value of the unit by a correction value This can be used as countermeasure for thermistor tolerances or capacity shortage The compensated temperature measured temperature plus compensation value is then used for controlling the system and will be displayed in the temperature read out mode See also 9 Automatic temperature compensation setting for compensation values for leaving water ...

Page 107: ...t continuously When pushing the y button The schedule timer for space heating will stop and will not start again The controller will be switched off operation LED will stop working However the schedule timer icon will stay displayed which means that the domestic water heating stays enabled When pushing the r p button The schedule timer for space heating and domestic water heating along with the qu...

Page 108: ...led the previous programmed command 13 00 and will remain active until the next programmed command 19 00 occurs So in order to know the actual setting one should consult the last programmed command It is clear that the last programmed command may date from the day before Refer to the operation manual The controller will be switched off operation LED will stop working However the schedule timer ico...

Page 109: ...d only increase if you feel that the domestic hot water supply temperature is not sufficient for your needs this depends on your water using pattern 2 Make sure the domestic hot water is not heated unnecessary Start with activating automatic storage during night default setting If it seems that the domestic hot water night storage operation is not sufficient for your needs an additional storage du...

Page 110: ...ch setback is started 2 02 Stop time time at which setback is stopped Setback operation for room temperature control Setback operation for leaving water control Notes 1 In setback operation for room temperature control immediately a setback temperature is set 2 In setback operation for leaving water control a shift down value is chosen This value should be lowered from the normal set point First c...

Page 111: ...instead of showing the water temperature set point the controller shows the shift value which can be set by the user 3 00 Low ambient temperature Lo_A low outdoor temperature 3 01 High ambient temperature Hi_A high outdoor temperature 3 02 Set point at low ambient temperature Lo_Ti the target outgoing water temperature when the outdoor temperature equals or drops below the low ambient temperature ...

Page 112: ...e de activated and there is no reheat function active the disinfection function will operate if a domestic hot water tank is installed and field setting 4 00 is set to ON The disinfection function field settings must be configured by the installer according to national and local regulations Refer to 5 Automatic setback and disinfection set point on page 102 for temperature set points Note This fun...

Page 113: ...eaving water setback temperature 5 03 Room setback temperature Note More details about setback function can be found in setting 2 First code Second code Setting name Default value Range Step Unit 5 Automatic setback and disinfection set point 00 Set point disinfection operation temperature 70 60 75 5 C 01 Disinfection operation time duration 10 5 60 5 min 02 Leaving water setback temperature 5 0 1...

Page 114: ...tomatic weather dependent set point operation Note By using an external room thermostat the smart logic of the standard remote controller is overruled 6 02 Heater kit Once installed you can activate the heater kit by changing field setting 6 02 1 From that moment on the heat pump system will take the heater kit into account whilst deciding operation When the heater is actually operating the heater...

Page 115: ...equest Therefor multiple set point pattern A can be configured to allow simultaneous domestic water and space heating without intermission Multi set point control according pattern B The basic setup of multiple set point pattern B is the same as a normal classic design so AGAIN no domestic water heating and space heating is possible simultaneously Multiple set point pattern B is focussed on space ...

Page 116: ...be activated when power returns to the unit after a power supply failure Press the pr button to enable the schedule timer again For EKHBRD AB AC 8 01 Backup heater optional setting 8 01 0 default During benefit kWh rate power supply mode the backup heater will not operate No autmatic heat pump operation stop is performed at lower ambient temperatures 8 01 1 During benefit kWh rate power supply mod...

Page 117: ...ault no prevention 8 04 1 prevention level 1 8 04 2 prevention level 2 The freeze up prevention is only active when the unit is in thermo OFF condition If prevention level 1 is enabled the freeze up prevention will start if the outdoor ambient temperature 4 C and if leaving or return water temperature 7 C For prevention level 2 the freeze up prevention will start as soon as the ambient temperature...

Page 118: ...N OFF admission By changing this value the operation range for space heating operation can be modified If the ambient temperature becomes higher than 24 C the value of 9 02 no space heating is possible Space heating can be requested as long as the ambient temperature is lower than 20 C the value of 9 02 Example 9 02 2 C First code Second code Setting name Default value Range Step Unit 9 Automatic ...

Page 119: ...ure A 04 Multi set point 2 temperature Notes 1 When temperature reducing devices are installed the system can be configured to use multi set points also the demand PCB option is needed 2 The selected values for multiple set point should be lower than the value from remote controller reference temperature or domestic hot water temperature pattern A 3 Daikin does not offer any temperature reducing d...

Page 120: ... always possible to cancel the operation by pushing the w button once 3 Pushing the y button has no influence on the domestic water heating Domestic hot water heating is only switched on or off by means of the w button and or disabling the storage schedule timer First code Second code Setting name Default value Range Step Unit B Domestic hot water set points 00 Set point reheat minimum temperature...

Page 121: ...n this way with a lower domestic hot water tank temperature setting the comfort level can be kept the same but with a lower energy consumption For EKHBRD AA Fixed at 70 C For EKHBRD AB AC b 04 Note The temperatures for weather dependent domestic water heating see figure are fixed and can not be changed b 03 Set point storage temperature see figure above Note If weather dependent domestic water hea...

Page 122: ...ible to limit the set points C 00 Set point leaving water maximum temperature C 01 Set point leaving water minimum temperature First code Second code Setting name Default value Range Step Unit C Leaving water temperature limits 00 Set point leaving water maximum temperature 80 37 80 1 C 01 Set point leaving water minimum temperature 25 25 37 1 C ...

Page 123: ...stic water heating Changing the timer values can have an impact on space heating and domestic water heating heat up timers The default values are proposed but can be changed depending on the complete system installation For a detailed explanation about simultaneous request of space heating and domestic water heating see control chapter First code Second code Setting name Default value Range Step U...

Page 124: ...nhance the air removal from the circuit The pump can operate at different speed E 04 0 normal operation of the unit default E 04 1 low pump speed operation pump only unit is not operating E 04 2 high pump speed operation pump only unit is not operating Notes 1 If you select E 04 1 or 2 and 6 00 1 the unit will activate the domestic hot water 3 way valve This function is a helpful feature to get al...

Page 125: ...ESIE09 08A Field Setting Test Operation 113 ...

Page 126: ...ing setting Please Attach the Capacity Setting Adapter corresponding to Capacity Class ex 112 140 160 in connector X51A See Below Capacity Setting Adapter 1 2 3 Capacity Class 4 112 5 140 6 160 CAPACITY SETTING ADAPTER for 11kW J112 CAPACITY SETTING ADAPTER for 14kW J140 CAPACITY SETTING ADAPTER for 16kW J160 Position of Attaching the Capacity Setting Adapter ERRQ 011 014 016 AAY1 ERSQ 011 014 016...

Page 127: ... A1P to spare parts PC Board please carry out the following setting Please Attach the Capacity Setting Adapter corresponding to Capacity Class ex 112 140 160 in connector X23A See Below Capacity Setting Adapter 1 2 3 Capacity Class 011 112 014 140 016 160 CAPACITY SETTING ADAPTER for 011 J112 CAPACITY SETTING ADAPTER for 014 J140 CAPACITY SETTING ADAPTER for 016 J160 Note X23A ...

Page 128: ...n Used to modify the operating status and to set program addresses etc Usually used in servicing the system Monitor mode H1P blinks Used to check the program made in Setting mode 2 Mode changing procedure Mode changing procedure H1P H2P H3P H4P H5P H6P H7P H8P LED indication c c H1P H2P H3P H4P H5P H6P H7P LED indication BS1 MODE BS2 SET BS3 RETURN BS4 TEST BS5 RESET V2760 Setting mode 1 Monitor m...

Page 129: ...n step Press BS1 MODE button V2762 Press BS1 MODE button Press 1 time BS3 button to enter setting Press 1 time BS2 button to change setting Press 1 time BS3 button to confirm setting Press 1 time BS3 button to activate setting Setting mode 1 Initial condition Press BS3 RETURN button Press BS3 RETURN button Press BS1 to leave mode MODE button Press BS1 MODE button for more than 5 sec to activate se...

Page 130: ...hould the system be set to any mode other than that push the MODE BS1 button to set the system to Setting mode 1 Normally Setting mode 1 is set In case of other status push MODE BS1 button one time and set to Setting mode 1 Check the system for each condition through LED displays Refer to information in table on the right Pushing the RETURN BS3 button will bring the system to the initial state of ...

Page 131: ...eld piping and indoor unit in the outdoor unit b Setting mode 2 Selection of setting items Selection of setting conditions Push and hold the MODE BS1 button for 5 seconds and set to Setting mode 2 Push the SET BS2 button and set the LED display to a setting item shown in the table on the right Push the RETURN BS3 button and decide the item The present setting condition is blinked Push the SET BS2 ...

Page 132: ... settings No Setting item display Setting condition display Setting item MODE H1P TEST H2P C H selection Low noise H6P Demand H7P IND H3P Master H4P Slave H5P Factory set 21 Refrigerant recovery vacuuming mode setting of R 410A circuit Refrigerant recovery vacuuming OFF Refrigerant recovery vacuuming ON 61 Automatic pump down operation Pump down OFF Pump down ON ...

Page 133: ...Contents of retry the latest 21 Contents of retry 1 cycle before 22 Contents of retry 2 cycle before 25 Normal judgment of outdoor units PC board c Lower 2 digits Abnormal Normal Unjudgment c Monitor mode Selection of setting item Confirmation on setting contents To enter the monitor mode push the MODE BS1 button when in Setting mode 1 Push the SET BS2 button and set the LED display to a setting i...

Page 134: ...ata such as addresses and number of units is expressed as binary numbers the two ways of expressing are as follows The No 1 cool heat unified address is expressed as a binary number consisting of the lower 6 digits 0 63 In the address is 010110 binary number which translates to 16 4 2 22 base 10 number In other words the address is 22 9 797997 16 4 1 32 8 2 ...

Page 135: ...uming mode setting 21 to ON The respective expansion valve of indoor and outdoor units are fully opened TEST OPERATION and UNDER CENTRALIZED CONTROL are displayed on the remote control and the indoor outdoor unit operation is prohibited After setting do not cancel Setting Mode 2 until completion of refrigerant recovery operation Collect the refrigerant using a refrigerant recovery unit See the ope...

Page 136: ...ting Mode 2 3 2 3 Setting of Automatic Pump Down Operation When carrying out the automatic pump down operation follow below operation procedure Operating procedure Turn on the main power supply Make sure the liquid stop valve is closed and the gas stop valve is open and that the low pressure switch is working In Setting Mode 2 set Automatic Pump Down setting 61 to ON After setting do not cancel Se...

Page 137: ... Sensor in Remote Controller 154 3 12 E1 Outdoor Unit PC Board Defect 155 3 13 E1 Indoor Unit PC Board Defect 156 3 14 E3 Outdoor Unit Actuation of High Pressure Switch 157 3 15 E3 Indoor Unit Actuation of High Pressure Switch 159 3 16 E4 Outdoor Unit Actuation of Low Pressure Sensor 162 3 17 E4 Indoor Unit Actuation of Low Pressure Sensor 164 3 18 E5 Outdoor Unit Inverter Compressor Motor Lock 16...

Page 138: ...door Unit Malfunction of Transmission between Inverter and Control PC Board198 3 48 LC Indoor Unit Malfunction of Transmission between Inverter and Control PC Board199 3 49 LH Indoor Unit Converter Error 200 3 50 P1 Outdoor Unit High Voltage of Capacitor in Main Inverter Circuit 201 3 51 P1 Indoor Unit High Voltage of Capacitor in Main Inverter Circuit 202 3 52 PJ Indoor Unit Faulty Combination of...

Page 139: ... the water circuit are completely open Check if the water filter needs cleaning Make sure there is no air in the system purge air Make sure that the expansion vessel is not broken Check the water pressure on the manometer 0 3 bar 4 The system does not operate The system stops and immediately restarts operation If the OPERATION lamp on the remote control turns ON the system will be normal These sym...

Page 140: ...ust be 0 3 bar Check that the manometer is not broken Check that the expansion vessel is not broken Check if the pressure of the expansion vessel is correct 7 Outdoor unit fan does not rotate In operation The reason is that fan revolutions are controlled to put the operation to the optimum state Normal operation 8 LCD display 88 appears on the remote control Immediately after turning ON the power ...

Page 141: ...n 4 seconds Press Inspection Test Operation button once Press Inspection Test Operation button once Or after 30 minutes Service data can be obtained Malfunction code history Service settings can be made Depress Inspection Test Operation button for more than 4 seconds Local setting mode Service mode Normal mode Inspection mode Test operation mode Thermostat is forcibly turned on Space heating see t...

Page 142: ...and malfunction contents Note 1 Pressing the INSPECTION TEST button will blink the check indication 2 While in check mode pressing and holding the ON OFF button for a period of five seconds or more will clear the failure history indication shown above In this case on the codes display the malfunction code will blink twice and then change to 00 Normal the Unit No will change to 0 and the operation ...

Page 143: ...alfunction occurs Alternating malfunction code possible indication for refrigerant type IU OU Unit Malfunction code Inspection Inspection mode Push the button Inspection test operation Push the button Inspection test operation Push the button Inspection test operation Push the button Inspection test operation Push the button 0 L 0 Indoor unit model code display 1 1 2 L 3 1 Outdoor unit model code ...

Page 144: ... Remote Control Service Mode How to Enter the Service Mode Service Mode Operation Method 1 Select the mode No Only Mode 40 can be set Normal operation mode Field set mode Push the button for 4 seconds or longer Push the button for 4 seconds or longer Service mode VF020 ...

Page 145: ...ubcode we can distinguish if the error is related to the R 410A or R 134a circuit Mode No Function Contents and operation method Remote control display example 40 Malfunction hysteresis display Display malfunction hysteresis The history No can be changed with the button Hystory No 1 5 1 Latest Unit 1 Malfunction code 2 U4 Malfunction code 40 VE007 ...

Page 146: ...peration lamp malfunction code and display of malfunctioning unit No let you know the contents and location of the malfunction When there is a stop due to malfunction the contents of the malfunction given below can be diagnosed by a combination of operation lamp INSPECTION display of the liquid crystal display and display of malfunction code It also lets you know the unit No during group control I...

Page 147: ...sconnection short circuit failure 177 J5 c Malfunction of thermistor R3T R5T R7T for suction pipe loose connection disconnection short circuit failure 179 J6 c Malfunction of thermistor R6T for heat exchanger loose connection disconnection short circuit failure 181 J7 c Malfunction of thermistor R7T for outdoor unit liquid pipe 182 J9 c Malfunction of subcooling heat exchanger gas pipe thermistor ...

Page 148: ...tion of DC fan 2 motor lock Malfunction of electronic expansion valve EV1 E9 EV3 Faulty sensor of outdoor air temperature Faulty Ta sensor short H9 Abnormal discharge pipe temperature Abnormal Td F3 Abnormal heat exchanger temperature Refrigerant over charge F6 Faulty sensor of discharge pipe temperature Faulty Tdi sensor short J3 Faulty sensor of suction pipe temperature Faulty Ts1 sensor short J...

Page 149: ...c c c c c c c c c c c E9 c c c c c c c c H9 c c c c c 1 F3 c c c c c c c c 1 F6 c c c c c c c J3 c c c c c c c c 1 J5 c c c c c c c c J6 c c c c c J7 c c c c c c J9 c c c c c JA c c c c c JC c c c c c L1 c c c c c c c c c c c c c c c c c c c c c c c c c c c c c L4 c c c c 1 L5 c c c c c L8 c c c c c c c c c c c c c L9 c c c c c c c c c c c LC c c c c c c 1 Master c Slave1 c Slave2 c c System Displ...

Page 150: ...Open phase Power supply imbalance Imbalance of inverter power supply voltage P1 Faulty temperature sensor of inverter radiation fin Faulty thermistor of inverter fin P4 Refrigerant shortage Refrigerant shortage alarm U0 Abnormal power supply voltage Insufficient Inverter voltage U2 Faulty charge of capacitor in main inverter circuit Malfunction due to SP PAM overvoltage Malfunction due to P N shor...

Page 151: ...4P H5P H6P H7P P1 c c c c c c 1 P4 c c c c U0 c c c c c c c c U2 c c c c 1 c c c c c c c c U3 c c c c c c c c c c c c U4 c c c c c c c c c c c U7 c c c c c c c c U9 c c c c c c c UA c c c c c c c c c c c c c c c c c c c c c c c c c c c c UH c c c c c c c c UF c c c c c c c c c 1 Master c Slave1 c Slave2 c c System Display of contents of malfunction first digit Display of contents of malfunction se...

Page 152: ...onditions When data could not be correctly received from the E PROM E PROM Type of nonvolatile memory Maintains memory contents even when the power supply is turned off Supposed Causes Defect of indoor unit PC board Troubleshooting Turn power supply OFF then power ON again Does the system return to normal YES Caution External factor other than malfunction for example noise etc Replace the indoor u...

Page 153: ... Troubleshooting Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged Connect the wiring and turn on again Fix the wiring and turn on again YES NO NO NO NO NO YES YES Replace the indoor unit PC board Replace the pump motor V2779 Is the wiring from the pump securely connected to connectors X20A on the indoor unit PC board A1P Wiring be...

Page 154: ...le bad wire Troubleshooting V2781 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred After connecting turn the power supply off and then back on X7A 1 2 3 4 5 6 Replace the moving part of the electronic expansion valve YES YES NO NO Replace the connecting cable If you turn the power supply off and turn on again and it still does not help...

Page 155: ...electronic expansion valve Discount the electronic expansion valve from the PC board and check the continuity between the connector pins Normal Continuity No continuity Pin No 1 White 2 Yellow 3 Orange 4 Blue 5 Red 6 Brown 1 White Approx 300 Approx 150 2 Yellow Approx 300 Approx 150 3 Orange Approx 150 4 Blue Approx 150 5 Red 6 Brown ...

Page 156: ... Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred The water circuit has a too high ESP compared to the maximum allowed ESP see technical specs Consider installing an additional pump with higher external static pressure in combination with a balancing bottle Make sure that all valves are open water pressure is OK 0 3bar P 3bar all air i...

Page 157: ...Malfunction Decision Conditions Operation and 1 When the capacity code is not contained in the PC board s memory and the capacity setting adapter is not connected 2 When a capacity that doesn t exist for that unit is set Supposed Causes You have forgotten to install the capacity setting adapter Defect of indoor unit PC board A4P Troubleshooting V2783 Caution Install a capacity setting adapter Repl...

Page 158: ...unction Detection Check the condition of transmission between indoor PC board A1P and PC board for control A3P using computer Malfunction Decision Conditions When normal transmission is not conducted for certain duration Supposed Causes Connection defect of the connecter between indoor PC board A1P and PC board for control A3P communication problem Malfunction of indoor PC board A1P Malfunction of...

Page 159: ...tion of transmission on indoor PC board using local installation mode C1 Malfunction breaks out again YES Replace PC board for control A3P Connect it and operate possible cause is instantaneous blackout Is the connector between indoor PC board A1P X35A X70A and PC board for control A3P X10A X15A accurately connected 1 NO Connect the connector accurately NO YES Connect the connecter X70A and turn o...

Page 160: ...ng Supposed Causes Defect of thermistor R3T for liquid pipe Defect of indoor unit PC board A1P Troubleshooting Refer to thermistor resistance temperature characteristics table on P251 V2784 Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged Replace the indoor unit PC board A1P Connect the thermistor and turn on again Bad wiring conn...

Page 161: ...tor R2T Defect of indoor unit PC board A3P Troubleshooting Refer to thermistor resistance temperature characteristics table on P251 V2785 Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged Replace the indoor unit PC board A3P Connect the thermistor and turn on again NO NO Replace the thermistor R2T Faulty thermistor value 90 C Bad w...

Page 162: ...g Supposed Causes Defect of indoor unit thermistor R4T for water return Defect of indoor unit PC board A1P Troubleshooting Refer to thermistor resistance temperature characteristics table on P251 Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged Replace the indoor unit PC board A1P Connect the thermistor and turn on again Faulty th...

Page 163: ...s running Supposed Causes Defect of indoor unit thermistor for leaving water R5T Defect of indoor unit PC board A1P Troubleshooting Refer to thermistor resistance temperature characteristics table on P251 Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged Replace the indoor unit PC board A1P Connect the thermistor and turn on again ...

Page 164: ...e thermistor becomes disconnected or shorted while the unit is running Supposed Causes Defect of remote control thermistor Defect of remote control PC board Defect of indoor PC board A1P Troubleshooting Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged V2787 Turn power supply OFF then power ON again Is C J displayed on theremote co...

Page 165: ... When data could not be correctly received from the E PROM E PROM Type of nonvolatile memory Maintains memory contents even when the power supply is turned off Supposed Causes Defect of outdoor unit PC board A1P Troubleshooting Turn off the power once and turn on again Return to normal YES Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be ...

Page 166: ...ata could not be correctly received from the E PROM E PROM Type of nonvolatile memory Maintains memory contents even when the power supply is turned off Supposed Causes Defect compressor main PC board A4P Troubleshooting Turn off the power once and turn on again Return to normal YES Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged...

Page 167: ...e contact of the high pressure protection switch opens Malfunction Decision Conditions Error is generated when the HPS activation count reaches the number specific to the operation mode Reference Operating pressure of high pressure switch Operating pressure 4 0MPa Reset pressure 3 0MPa Supposed Causes Actuation of outdoor unit high pressure switch Defect of High pressure switch Defect of outdoor u...

Page 168: ...ure sensor Is the pressure detected with the PC board normal See 2 Replace the main PC board The high pressure sensor is normal and the pressure detected with the PC board is also normal The high pressure has really become high CHECK 1 1 Make a comparison between the voltage of the pressure sensor 4 and that read by the pressure gauge As to the voltage of the pressure sensor make measurement of vo...

Page 169: ...on Conditions Error is generated when the HPS activation count reaches the number specific to the operation mode Reference Operating pressure of high pressure switch Operating pressure 3 8MPa Reset pressure 2 7MPa Supposed Causes Actuation of indoor unit high pressure switch Defect of High pressure switch Defect of Indoor unit PC board A4P Faulty high pressure sensor Refrigerant blockage Water blo...

Page 170: ...ure service port Connect the Service Tool Reset the operation using the remote control put power off for 10 seconds and then restart the operation YES YES Check for the points shown below Are all water vaves open Is water flow possible Is water filter clean Is the water circuit filled with water Is all air removed from the water circuit Does the stop due to malfunction E3 12 recur Is the HPS opera...

Page 171: ...essure sensor make measurement of voltage at the connector and then convert it to pressure 2 3 Make measurement of voltage of the pressure sensor Connector for high pressure sensor Red Make measurement of DC voltage between these wires 4 Red Black White Micro controller A D input High pressure sensor Make a comparison between the high pressure value checked with the Service Tool and the voltage of...

Page 172: ... Method of Malfunction Detection Abnormality is detected by the pressure value with the low pressure sensor Malfunction Decision Conditions Error is generated when the low pressure is dropped under specific pressure Operating pressure 0 07MPa Supposed Causes Abnormal drop of low pressure Lower than 0 07MPa Defect of low pressure sensor Defect of outdoor unit PC board A1P Stop valve is not opened ...

Page 173: ...also normal The low pressure has really become low Refer to remove the causes by which the low pressu re has become low 1 Make acomparison between thevoltage of the p ressu re sensor 4 and that read by the pressu re gauge Asto the voltage of the pressure sensor make measurement of voltage at the connector and and thenconvert it to pressure 2 Make a comparison between the low pressu re value checke...

Page 174: ...by the pressure value with the low pressure sensor Malfunction Decision Conditions Error is generated when the low pressure is dropped under specific pressure Operating pressure 0 07MPa Supposed Causes Abnormal drop of low pressure Lower than 0 07MPa Defect of low pressure sensor Defect control PC board A4P Stop valve is not opened Troubleshooting Warning CAPACITOR SHOCK HAZARD The capacitors top ...

Page 175: ...is also normal The low pressure has really become low Refer to remove the causes by which the low pressure has become low 1 Make a comparison between the voltage of the pressure sensor 4 and that read by the pressure gauge As to the voltage of the pressure sensor make measurement of voltage at the connector and then convert it to pressure 2 Make a comparison between the low pressure value checked ...

Page 176: ...auses Compressor lock High differential pressure 0 5MPa or more Incorrect UVW wiring Faulty inverter PC board Stop valve is left in closed Troubleshooting Check the installation conditions Is the stop valve open NO Is the UVW wiring normal NO NO NO NO Is high differential pressure starting 0 5MPa or more YES YES YES Check and see whether compressor is short circuited or ground YES YES Are inverter...

Page 177: ... pressure 0 5MPa or more Incorrect UVW wiring Faulty inverter PC board Stop valve is left in closed Troubleshooting Warning CAPACITOR SHOCK HAZARD The capacitors top surfaces can hold up to 220V Use correct precautions when servicing Check the installation conditions Is the stop valve open NO Is the UVW wiring normal NO NO NO NO Is high differential pressure starting 0 5MPa or more YES YES YES Che...

Page 178: ...ll IC when the fan motor runs Malfunction Decision Conditions When the fan runs with speed less than a specified one for 6 seconds or more when the fan motor running conditions are met When malfunction is generated 4 times the system shuts down Supposed Causes Malfunction of fan motor The harness connector between fan motor and PC board is left in disconnected or faulty connector Fan does not run ...

Page 179: ...be occurred Has eitherthefuse F4UonthecontrolPCboard A1P orthefuseF1UontheinverterPC board A2P blownout NO NO Connect the connector Remove the obstacle Correct the power supply voltage If L1 and N phases are open replace the switch box YES NO Replace outdoor unit PC board If the F4U has blown out replace the fuse If the F1U has blown out replace the inverter PC board assy Replace the fan motor Are...

Page 180: ...n valve Defect of outdoor unit PC board A1P Defect of connecting cable Troubleshooting V3067 YES Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged Return to normal Turn power supply off and turn power supply on again Electronic expansion valve is connected to X21A and X22A of outdoor unit PC board A1P The connecting cable is short ...

Page 181: ... Disconnect the electronic expansion valve from the PC board and check the continuity between the connector pins Normal Continuity No continuity V3067 Orange 1 Red 2 Yellow 3 Black 4 Gray 5 White 6 Pin No 1 Orange 2 Red 3 Yellow 4 Black 5 Gray 6 White 1 Orange Approx 100 Approx 50 2 Red Approx 100 Approx 50 3 Yellow Approx 50 4 Black Approx 50 5 Gray 6 White ...

Page 182: ...ve Defect of indoor unit PC board A4P Defect of connecting cable Troubleshooting Normal when coil check of the moving part of the electronic expansion valve is checked V3067 YES Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged Return to normal Turn power supply off and turn power supply on again Electronic expansion valve is conne...

Page 183: ...isconnect the electronic expansion valve from the PC board and check the continuity between the connector pins Normal Continuity No continuity V3067 White 1 Yellow 2 Orange 3 Blue 4 Red 5 Brown 6 Pin No 1 White 2 Yellow 3 Orange 4 Blue 5 Red 6 Brown 1 White Approx 300 Approx 150 2 Yellow Approx 300 Approx 150 3 Orange Approx 150 4 Blue Approx 150 5 Red 6 Brown ...

Page 184: ...ensor Faulty connection of discharge pipe temperature sensor Faulty outdoor unit PC board Troubleshooting Refer to Thermistor Resistance Temperature Characteristics table on P251 V3068 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Discharge pipe temperature is 120 C or higher when the unit stop by malfunction Pull out the discharge ...

Page 185: ...es Faulty discharge pipe temperature sensor R6T Faulty connection of discharge pipe temperature sensor Faulty indoor unit PC board Troubleshooting Refer to Thermistor Resistance Temperature Characteristics table on page 251 Caution Be sure to turn off power switch before connect or disconnect connector or parts may be damaged Discharge pipe temperature is 120 C or higher when the unit stop by malf...

Page 186: ...rcuit or open circuit Supposed Causes Defect of thermistor R1T for outdoor air Defect of outdoor unit PC board A1P Troubleshooting Refer to Thermistor Resistance Temperature Characteristics table on page 251 V3070 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Resistance is normal when measured after disconnecting the thermistor R1T ...

Page 187: ...ature thermistor is detected Supposed Causes Defect of thermistor R2T for outdoor unit discharge pipe Defect of outdoor unit PC board A1P Troubleshooting Refer to thermistor resistance temperature characteristics table on P252 V3072 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Resistance is normal when measured after disconnecting ...

Page 188: ...etected Supposed Causes Defect of thermistor R6T for indoor unit discharge pipe Defect of indoor unit PC board A4P Troubleshooting Refer to thermistor resistance temperature characteristics table on P252 Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged Resistance is normal when measured after disconnecting the thermistor R6T from ...

Page 189: ...cted Supposed Causes Defect of thermistor R3T R5T for outdoor unit suction pipe Defect of outdoor unit PC board A1P Troubleshooting Refer to thermistor resistance temperature characteristics table on P251 V3073 Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged Resistance is normal when measured after disconnecting the thermistor R3...

Page 190: ...auses Defect of thermistor R7T for liquid R134a Defect of indoor unit PC board A4P Troubleshooting Refer to thermistor resistance temperature characteristics table on P251 Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged Resistance is normal when measured after disconnecting the thermistor R7T from the indoor unit PC board 3 5k 36...

Page 191: ...ange thermistor is detected Supposed Causes Defect of thermistor R6T for outdoor unit heat exchanger Defect of outdoor unit PC board A1P Troubleshooting Refer to thermistor resistance temperature characteristics table on P251 Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged NO NO Replace the thermistor R6T YES YES Connect the ther...

Page 192: ...thermistor is detected Supposed Causes Defect of thermistor R7T for outdoor unit liquid pipe Defect of outdoor unit PC board A1P Troubleshooting Refer to thermistor resistance temperature characteristics table on P251 V3074 Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged NO NO Replace the thermistor R7T YES YES Connect the thermi...

Page 193: ...hort circuited or open Supposed Causes Faulty subcooling heat exchanger gas pipe thermistor R4T Faulty outdoor unit PC board Troubleshooting Refer to Thermistor Resistance Temperature Characteristics table on P251 V3075 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Is the resistance measured after removing the thermistor R4T from ou...

Page 194: ...rd Troubleshooting 1 Voltage measurement point 2 Refer to Pressure Sensor pressure voltage characteristics table on P254 V2806 Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged The relationship between the 1 VH and high pressure is normal see 2 when voltage is measured between X17A pins 1 and 3 of indoor unit PC board A1P see 1 Rep...

Page 195: ...ection Defect of indoor unit PC board A4P Troubleshooting 1 Voltage measurement point 2 Refer to Pressure Sensor pressure voltage characteristics table on P254 V2806 Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged Caution Replace the high pressure sensor NO NO Replace indoor unit PC board A4P YES YES Bad wire connection Value 0 1 bar ove...

Page 196: ... pressure sensor with wrong connection Defect of outdoor unit PC board Troubleshooting 1 Voltage measurement point 2 Refer to Pressure Sensor pressure voltage characteristics table on P254 V2808 Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged Replace the low pressure sensor Connect low pressure sensor property and restart system ...

Page 197: ...nt point 2 Refer to Pressure Sensor pressure voltage characteristics table on P254 Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged The relationship between the 1VL and low pressure is normal see 2 when voltage is measured between X18A pins 2 and 3 indoor unit PC board A4P see 1 Replace the low pressure sensor Connect low pressure...

Page 198: ...In case of overcurrent OCP during waveform output When the current sensor malfunctions during synchronized operation In case of IGBT malfunction Supposed Causes Faulty outdoor PC board A1P Over current Current sensor failure Failure of IGBT or drive circuit Troubleshooting YES NO Turn OFF the power supply once and then turn it ON again Does it return normally It is believed that external factors n...

Page 199: ... case of overcurrent OCP during waveform output When the current sensor malfunctions during synchronized operation In case of IGBT malfunction Supposed Causes Faulty indoor PC board A4P 1ø or A5P 3ø Over current Current sensor failure Failure of IGBT or drive circuit Troubleshooting YES NO Turn OFF the power supply once and then turn it ON again Does it return normally It is believed that external...

Page 200: ...PC board A2P Defect of fin thermistor Troubleshooting Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged Faulty heat radiation of power unit Air suction opening blocked Dirty radiator fin High outdoor temperature Check heat conductive paste NO YES The radiator fin temperature is supposed to have risen to 84 C or more Properly connec...

Page 201: ...Defect of fin thermistor R8T Troubleshooting Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged Faulty heat radiation of power unit Air suction or discharge opening blocked Dirty radiator fin High water discharge temperature Check heat conductive paste Continue operation NO YES Replace the inverter PC board assy YES The radiator fin...

Page 202: ...verter PC board A2P Overcurrent Troubleshooting Higher voltage than actual is displayed when the inverter output voltage is checked by tester V2812 Compressor inspection Caution Inverter output voltage check Inverter output voltage is not balanced Normal if within 5VMust be measured when frequency is stable Replace the compressor NO Replace the inverter PC board assembly A2P YES Correct power supp...

Page 203: ...bleshooting Higher voltage than actual is displayed when the inverter output voltage is checked by tester Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Compressor inspection Inverter output voltage check Inverter output voltage is not balanced Normal if within 5V Must be measured when frequency is stable Replace the compressor Compr...

Page 204: ... occurred Output current check Inverter output voltage check Inverter output voltage is not balanced Normal if within 5V Must be measured when frequency is stable Compressor overload Inspection of the compressor and refrigerant system is required Compressor inspection Inspect according to the diagnosis procedure for odd noises vibration and operating status of the compressor NO Replace the inverte...

Page 205: ...rter output voltage check Inverter output voltage is not balanced Normal if within 5V Must be measured when frequency is stable Compressor overload Inspection of the compressor and refrigerant system is required Compressor inspection Inspect according to the diagnosis procedure for odd noises vibration and operating status of the compressor NO Replace the inverter PC board assy A4P ø or A5P ø YES ...

Page 206: ... power switch before connect or disconnect connector or parts damage may be occurred Inverter output voltage check Inverter output voltage is not balanced Normal if within 5V Must be measured when frequency is stable Unsatisfactory pressure equalization Check refrigerant system Compressor inspection Inspect according to the diagnosis procedure for odd noises vibration and operating status of the c...

Page 207: ...turn off power switch before connect or disconnect connector or parts damage may be occurred Inverter output voltage check Inverter output voltage is not balanced Normal if within 5V Must be measured when frequency is stable Unsatisfactory pressure equalization Check refrigerant system Compressor inspection Inspect according to the diagnosis procedure for odd noises vibration and operating status ...

Page 208: ...lfunction of connection between the inverter microcomputer and outdoor control microcomputer Defect of outdoor unit PC board A1P or inverter PC board A2P External factor Noise etc Troubleshooting Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged Are the connectors of the inverter PC board and the control PC board securely connected...

Page 209: ...Causes Malfunction of connection between the inverter microcomputer and indoor control microcomputer Defect of indoor unit PC board A4P 1ø or A5P 3ø External factor Noise etc Troubleshooting Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged Are the connectors of the inverter PC board and the control PC board securely connected Repl...

Page 210: ...trol Display LH Subcode 2 Applicable Models All indoor units Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Inverter PC board problem Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connector otherwise parts may be damaged Replace the inverter PC board ...

Page 211: ...power supply open phase Supposed Causes Defect of main circuit capacitor Improper main circuit wiring Defect of outdoor unit PC board A2P Imbalance of phase to phase voltages Open phase Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Have the power supply voltages of three phases fallen within the range of rated voltag...

Page 212: ...y open phase Supposed Causes Defect of main circuit capacitor Improper main circuit wiring Defect of indoor unit inverter PC board A4P 1ø or A5P 3ø Imbalance of phase to phase voltages Open phase Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Have the power supply voltages of three phases fallen within the range of ra...

Page 213: ...is malfunction is detected according to communications with the inverter Malfunction Decision Conditions Make judgment according to communication data on whether or not the type of the inverter PCB is correct Supposed Causes Mismatching of type of PCB Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connector otherwise parts may be damaged Replace the...

Page 214: ...n Detection Short of gas malfunction is detected by discharge pipe temperature thermistor and low pressure saturation temperature Malfunction Decision Conditions Microcomputer judge and detect if the system is short of refrigerant Malfunction is not decided while the unit operation is continued Supposed Causes Out of gas or refrigerant system clogging incorrect piping Defect of pressure sensor Def...

Page 215: ...ystem Replace the thermistor R3T Replace the outdoor unit PC board A1P YES YES NO NO Out of gas closing of stop valve or refrigerant system is clogged Requires check of refrigerant system Replace main outdoor unit PC board A1P YES YES Is the low pressure sensor correct Replace the low pressure sensor NO NO Cooling Low pressure is 0 25 MPa or less The voltage of X18A pins 2 and 3 on main outdoor un...

Page 216: ...011 016 Method of Malfunction Detection Detection of voltage of main circuit capacitor built in the inverter and power supply voltage Malfunction Decision Conditions When the abnormal voltage of main circuit capacitor built in the inverter and abnormal power supply voltage are detected Supposed Causes Power supply insufficient Instantaneous power failure Defect of outdoor inverter PC board A2P ...

Page 217: ... A2P Check for the PC board conditions In case of significant failure the PC board may have got faulty due to faulty compressor Consequently even if the PC board is replaced it may get faulty again To avoid that recheck the compressor for grounding and for any broken wires Furthermore even after replacing the PC board carry out inspections on the compressor Correct the power supply voltages If L2 ...

Page 218: ...n of voltage of main circuit capacitor built in the inverter and power supply voltage Malfunction Decision Conditions When the abnormal voltage of main circuit capacitor built in the inverter and abnormal power supply voltage are detected Supposed Causes Power supply insufficient Instantaneous power failure Defect of indoor inverter PC board A4P 1ø or A5P 3ø Converting problem Troubleshooting Warn...

Page 219: ...for the PC board conditions In case of significant failure the PC board may have got faulty due to faulty compressor Consequently even if the PC board is replaced it may get faulty again To avoid that recheck the compressor for grounding and for any broken wires Furthermore even after replacing the PC board carry out inspections on the compressor Correct the power supply voltages If L2 or Phase N ...

Page 220: ...ls ER Q 011 016 Method of Malfunction Detection Microcomputer checks if transmission between indoor and outdoor unit is normal Malfunction Decision Conditions When transmission is not carried out normally for a certain amount of time Supposed Causes Indoor to outdoor transmission wiring F1 F2 disconnection short circuit or wrong wiring Outdoor unit power supply is OFF Defect of outdoor unit PC boa...

Page 221: ...ansmission wiring been modified Indoor unit remote controller displays U4 NO Outdoor unit PC board microcomputer monitor HAP blinks NO NO NO Operation ready lamp H2P is blinking Lamp does not go off for 12 minutes or more Is indoor outdoor unit transmission wiring normal YES The fuse F3U on the outdoor unit s PC board is burnt Replace outdoor unit PC board A1P YES YES Has either the fuse F4U on th...

Page 222: ... QA communication of indoor unit Malfunction Decision Conditions When transmission is not carried out normally for a certain amount of time Supposed Causes Wrong wiring between indoor unit PC boards A4P 1ø or A5P 3ø and A1P Troubleshooting Caution Replace indoor unit PC board Correct the wiring YES NO Is the wiring 1 2 3 communication and upwiring normal Be sure to turn off power switch before con...

Page 223: ...A1P Defect of remote control PC board Malfunction of transmission caused by noise Troubleshooting Refer to information on P221 Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged V2823 NO YES YES NO Replace indoor unit PC board A1P Set one remote control to SUB turn the power supply off once and then back on There is possibility of m...

Page 224: ...unit Improper cool heat selection Improper cool heat unified address outdoor unit external control adaptor for outdoor unit Defect of outdoor unit PC board A1P Defect of external control adaptor for outdoor unit Troubleshooting Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged V2824 C H SELECT is set to IND Replace the outdoor unit...

Page 225: ... continue for specified period Supposed Causes Malfunction of transmission between main and sub remote control Connection between sub remote controls Defect of remote control PC board Troubleshooting Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged V2825 SS1 of both remote controls is set to SUB Set SS1 to MAIN the power supply of...

Page 226: ...of the type of indoor and outdoor unit Setting of outdoor PC board was not conducted after replacing to spare parts PC board Troubleshooting Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged V3169 Normal NO Push and hold the RESET button on the outdoor unit PC board for 5 seconds Is the outdoor PC board replaced to spare parts PC b...

Page 227: ...ny erroneous connection of unit Supposed Causes Improper connection of transmission wiring between indoor outdoor unit QA wiring problem Defect of indoor unit PC board Troubleshooting Note Wiring check operation may not be successful if carried out after the outdoor unit has been off for more than 12 hours Caution Be sure to turn off power switch before connecting or disconnecting connector otherw...

Page 228: ... board A1P Troubleshooting Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged V2831 NO YES Fix incorrect wiring push and hold the RESET button on the master outdoor unit PC board for 5 seconds Normal NO Is electricity being introduce for the first time after installation or after an indoor or outdoor unit PC board has been replaced ...

Page 229: ...emperature of indoor unit High ambient temperature Is the suction air temperature not more than 27 C Is the indoor temperature not more than 27 C Faulty suction air thermistor of indoor unit High suction air temperature of outdoor unit Faulty outdoor temperature thermistor of outdoor unit Is the connector properly connected Are the thermistor resistance characteristics normal Is the outdoor temper...

Page 230: ...d pipe Cloggingofforeignparticles Stop valve closed Does the piping length fall in the permissible range Conduct visual checks for pipe conditions Is there any temperature difference caused before and after the filter or branch pipe Check to be sure the stop valve is open Less circulation quantity of refrigerant Degradation in condensing capacity Inadequate refrigerant quantity Refer to P 189 Mois...

Page 231: ...er supply off 2 With the fan motor connector on motor side disconnected measure the resistance between each pin then make sure that the resistance is more than the value mentioned in the following table Measurement point Judgment 1 4 1M or more 2 4 100k or more 3 4 100 or more 4 7 100k or more GND 1 White 2 Orange 3 Brown 4 Blue 5 6 7 Red ...

Page 232: ...Troubleshooting by Indication on the Remote Controller ESIE09 08A 222 Troubleshooting ...

Page 233: ...erter s Power Transistors Modules 255 6 External Backup Heater Kit 258 6 1 Model Name 258 6 2 Main Components 259 6 3 Technical Specifications 261 6 4 Detailed Explanation of Setting Modes 262 6 5 External Backup Heater Control 263 6 6 Troubleshooting by Indication on the Remote Controller 265 6 7 Troubleshooting General Symptoms 266 6 8 Switch Box Layout 267 6 9 Wiring Diagrams 269 7 3 Way Valve ...

Page 234: ...PA RATOR R8T R1T R4T R2T R5T R3T R6T R7T ACCUMULATOR HEATING STOP VALVE WITH SERVICE PORT ON FIELD PIPING SIDE ø 7 9MM FLARE CONNECTION DEFROST FANS M1F M2F SP p SERVICE PORT 4 WAY VALVE Y1S CAPILLARY TUBE CAPILLARY TUBE HIGH PRESSURE SENSOR S1NPH HIGH PRESSURE SWITCH S1PH SOLENOID VALVE Y3S SOLENOID VALVE Y2S DOUBLE PIPE HEAT EXCHANGER PRESSURE REGULATING VALVE SV SV SP COMPRESSOR M1C Low pressur...

Page 235: ...R4T R2T R5T R3T R6T R7T ACCUMULATOR HEATING STOP VALVE WITH SERVICE PORT ON FIELD PIPING SIDE ø 7 9MM FLARE CONNECTION DEFROST FANS M1F M2F SP p SERVICE PORT 4 WAY VALVE Y1S CAPILLARY TUBE CAPILLARY TUBE HIGH PRESSURE SENSOR S1NPH HIGH PRESSURE SWITCH S1PH SOLENOID VALVE Y3S SOLENOID VALVE Y2S DOUBLE PIPE HEAT EXCHANGER PRESSURE REGULATING VALVE SV SV SP COMPRESSOR M1C Low pressure sensor S1NPL ...

Page 236: ...R 410A R 134a CHECK VALVE M1C E1HC R6T Y1R M K1S R5T Q2L R4T M1P K2S K1E K2E R3T R7T B1PL B1PH S1PH ACCUMULATOR CHECK VALVE KHTS 200 260 G 1 1 4 female WATER OUTLET STANDARD WATER SIDE 3 WAY VALVE REFRIGERANT SIDE OUTDOOR UNIT SERVICE PORT 5 16 SERVICE PORT 5 16 R Q011 016 FIELD INSTALLATION DELIVERED WITH OPTION DOMESTIC HOT WATER TANK G 1 1 4 female AIR PURGE SHUT OFF VALVE SHUT OFF VALVE FIELD ...

Page 237: ...ESIE09 08A Piping Diagrams Appendix 227 EKHBRD 011 014 016 AB AC V1 Y1 ...

Page 238: ...stor R6T Discharge thermistor R7T Liquid thermistor R 134a S1PH High pressure switch B1PL Low pressure sensor B1PH High pressure sensor K1E Electronic expansion valve R 410A K2E Electronic expansion valve R 134a E1HC Crankcase heater Y1R Four way valve K2S 2 way valve K1S 3 way valve Q2L Thermistor protector waterpiping M1C Compressor M1P DC invertor pump ...

Page 239: ...Diagrams Appendix 229 1 3 Switch Box Layout EKHBRD 011 014 016 AA V1 EKHBRD 011 014 016 AB AC V1 A7P X3M Fieldwiring to X3M A8P Fieldwiring to X2M A7P Fieldwiring to X1M X1M X2M C1 X2Y X1Y X3Y A5P A4P A6P A8P A3P A1P K1A ...

Page 240: ...umber Description A1P Main PCB A2P User interface PCB remote controller A3P Control PCB A4P Inverter PCB A5P QA PCB A6P Filter PCB A7P Digital I O PCB A8P Demand PCB A10P Thermostat PCB A11P Receiver PCB C1 Capacitor K1A Interface relay X1M X3M Terminal strip X1Y X3Y Connector ...

Page 241: ...9 08A Piping Diagrams Appendix 231 EKHBRD 011 014 016 AAY1 EKHBRD 011 014 016 AB AC Y1 A7P X3M Fieldwiring to X3M A8P Fieldwiring to X2M A7P Fieldwiring to X1M X1M X2M X2Y X1Y X3Y A8P A3P A1P K1A A6P A4P A5P ...

Page 242: ...umber Description A1P Main PCB A2P User interface PCB remote controller A3P Control PCB A4P Inverter control PCB A5P Inverter PCB A6P Filter PCB A7P Digital I O PCB A8P Demand PCB A10P Thermostat PCB A11P Receiver PCB K1A Interface relay X1M X3M Terminal strip X1Y X3Y Connector ...

Page 243: ... LA LB LC R1 R2 U V W U U V V W W MS POSITION OF COMPRESSOR TERMINAL WIRE ENTRANCE 3 MS 3 MS 3 LD LE C2 C3 C1 K1M V2R V1T X32A S1PH FINTH X111A X11A 1 1 R1T R2T R3T R4T R5T R6T R7T R8T X12A X13A P C4 t t t t t t t t t P ORG GRY N HAP V3R V1R X106A X107A F6U K5R BLU Z3F Z4F PS RED A1P L1R X2A WHT WHT BLU NB NC F4U NA E Z8C N 1 1N 50Hz 220 240V Z 2 F Z6C RED M1F M2F WHT BLU N 1 Z2C M1C N 6 Z3C X25A ...

Page 244: ...or M1C V1T IGBT K1R Magnetic relay Y1S X1M Terminal strip power supply K2R Magnetic relay Y2S X2M Terminal strip control K3R Magnetic relay Y3S X1M Terminal strip C H selector A4P K4R Magnetic relay E1HC Y1E Electronic expansion valve main K5R Magnetic relay Y3E Electronic expansion valve subcool L1R Reactor Y1S Solenoid valve 4 way valve M1C Motor compressor Y2S Solenoid valve hot gas M1F Motor f...

Page 245: ...1M X2M F6U U U U V V W W V W C1 C2 C3 X111A X105A X106A X506A Z7C Z5C Z6C N 1 N 5 N 6 X516A M1F M1C COMPRESSOR TERMINAL POSITION MS 3 MS 3 MS 3 M2F X507A X517A X107A X109A X191A X108A X104A R9T t L1A L11B L12B L22B L32B L21B L31B N1B F1U F2U F4U E GRN E7H F7U F8U GRN E1 F3U F5U F1 1 1 F2 BPH BRN RED X2M X81A X25A X11A X12A X13A K1R K2R K3R K4R Y1S R1T t t t t t t t t R2T R3T R4T R5T R6T R7T R8T Y2...

Page 246: ...r green V3R Diode module H1P 8P A1P Pilot lamp service monitor orange H2P prepare test flickering malfunction detection light up X1M Terminal strip X2M Terminal strip control K1M K2M Magnetic contactor Y1E Expansion valve main K1R A1P Magnetic relay Y1S Y3E Expansion valve subcool K2R A1P Magnetic relay Y2S Y1S 4 way valve K3R A1P Magnetic relay Y3S Y2S Solenoid valve hot gas K4R A1P Magnetic rela...

Page 247: ...ESIE09 08A Wiring Diagrams Appendix 237 2 2 Field Wiring Connection Diagram ERRQ ERSQ 011 014 016 A V1 Y1 in combination with EKHBRD ...

Page 248: ... 1 A1P X85A 1 A1P X85A 2 A1P X85A 3 A1P X85A 4 A1P X85A 5 A1P X85A 6 A1P X33A 2 A1P X33A 3 A1P X33A 4 A1P X33A 5 A1P X33A 6 1 2 1 2 3 4 5 6 X85A 1 2 3 4 5 6 X7A 1 2 3 4 5 6 X20A NE 1 2 3 4 5 6 7 8 X25A X27A L N COMM 1 3 X18A 1 2 X12A 1 1 3 5 2 X70A 5 1 A3P X1A 1 5 2 A3P X1A 3 5 2 5 1 5 1 1 2 X35A 1 2 X17A 1 2 3 WHT YLW ORG BLU BLU BRN RED BLK WHT RED BRN A1P X85A 1 A1P X85A 2 A1P X85A 3 A1P X85A 4...

Page 249: ...T1R T3R T2R R6T K2E M R7T X4Y R8T C1 C2 C3 C1 R1L Z4F TC RC PS Z2F N 2 V2C N 2 V1C N 2 V4C A6P A4P HAP K3R K1R K4R K1A X3Y Y1R Q2L E1HC S1PH P A5P N 1 A3P X1A 1 6 6 A1P X27A 1 6 6 A1P X27A 3 6 6 A1P X27A 5 6 6 NA NB NC LA LF LB LC R1 R2 U V W U V W F1U F4U F3U NF E A3P X1A 3 6 6 L X803A 1 E3 N 3 COMM 5 X801A 1 X809A 1 X111A 1 2 2 3 4 X9A 1 2 3 4 3 1 LD LE P N 2 t V3C M1C MS 3 N 6 M1F M 1 M2F M 1 1...

Page 250: ...Wiring Diagrams ESIE09 08A 240 Appendix EKHBRD 011 014 016 AB AC V1 ...

Page 251: ...ESIE09 08A Wiring Diagrams Appendix 241 ...

Page 252: ...on valve K2E Electronic expansion valve K R A P PCB relay K1S 3 way valve K2S 2 way valve M1C Compressor M1F M2F Switchbox cooling fan M1P DC inverter pump PC A11P Power circuit PHC1 Optocoupler input circuit PS A P Switching power supply Q1DI Q2DI Earth leakage protector Q2L Thermal protector water piping R1 R2 A4P Resistance R1L Reactor RC A P Receiver circuit S1PH High pressure switch S1S Benef...

Page 253: ... A5P QA PCB A6P Filter PCB A7P Digital I O PCB A8P Demand PCB A9P Service PCB A10P Thermostat PCB A11P Receiver PCB R1H EKRTR Humidity sensor R1T EKRTW R Ambient sensor R2T EKHTS Domestic hot water tank thermistor R2T EKRTETS External sensor floor or ambient R3T Liquid thermistor R 410A R4T Returning water thermistor R5T Leaving water thermistor R6T Discharge thermistor R7T Liquid thermistor R 134...

Page 254: ...2 F1 F2 F1 F2 P1 P2 X15A X33A A1P X33A 1 A1P X85A 1 A1P X85A 2 A1P X85A 3 A1P X85A 4 A1P X85A 5 A1P X85A 6 A1P X33A 2 A1P X33A 3 A1P X33A 4 A1P X33A 5 A1P X33A 6 1 2 1 2 3 4 5 6 X85A 1 2 3 4 5 6 X7A 1 2 3 4 5 6 X20A NE 1 2 3 4 5 6 7 8 X25A X27A L N COMM 1 3 X18A 1 2 X12A 1 1 3 5 2 X70A 5 2 A3P X1A 1 5 2 A3P X1A 3 5 2 5 2 5 2 1 2 X35A 1 2 X17A 1 2 3 WHT YLW ORG BLU BLU BRN RED BLK WHT RED BRN A1P X...

Page 255: ...Z1F Z1F Z3F N 5 V6C N 1 V4C N 2 V5C N 2 A5P V7C N 2 V1C N 1 V2C A4P HAP HAP K3R K1R K2R X3Y Y1R E1HC A6P N 1 A3P X1A 1 6 6 A1P X27A 1 6 6 A1P X27A 3 6 6 A1P X27A 5 6 6 NA L3A L2A L1A F1U F2U R1 U V W U V W F4U F6U F3U F5U F2 250V 3 15A F1 250V 3 15A A3P X1A 3 6 6 L X803A 1 E1 E N 3 COMM 5 X108A 1 X111A 1 2 L11A L12B L11B L21B L31B N1B L22B L32B L21A L31A N1A 3 X109A 1 3 X104A 1 2 3 4 X105A 1 2 3 4...

Page 256: ...Wiring Diagrams ESIE09 08A 246 Appendix EKHBRD 011 014 016 AB AC Y1 ...

Page 257: ...ESIE09 08A Wiring Diagrams Appendix 247 ...

Page 258: ...sion valve K1M K2M PCB contactor K R A P PCB relay K1S 3 way valve optional K2S 2 way valve M1C Compressor M1F M2F Switchbox cooling fan M1P DC inverter pump PC A11P Power circuit PHC1 Optocoupler input circuit PS A P Switching power supply Q1DI Q2DI Earth leakage protector Q2L Thermal protector water piping R1 A5P Resistance R1L R3L Reactor RC A P Receiver circuit S1PH High pressure switch S1S Be...

Page 259: ...ital I O PCB optional A8P Demand PCB optional A10P Thermostat PCB optional A11P Receiver PCB optional R1H EKRTR Humidity sensor optional R1T EKRTW R Ambient sensor optional R2T EKHTS Domestic hot water tank thermistor optional R2T EKRTETS External sensor floor or ambient optional R3T Liquid thermistor R 410A R4T Returning water thermistor R5T Leaving water thermistor R6T Discharge thermistor R7T L...

Page 260: ...Wiring Diagrams ESIE09 08A 250 Appendix ...

Page 261: ... 43 57 94 52 6 65 6 53 3 56 49 55 08 53 6 41 6 53 4 53 71 52 38 54 6 65 6 53 5 51 09 49 83 55 6 41 6 53 6 48 61 47 42 56 6 18 6 06 7 46 26 45 14 57 5 95 5 84 8 44 05 42 98 58 5 74 5 43 9 41 95 40 94 59 5 14 5 05 10 39 96 39 01 60 4 96 4 87 11 38 08 37 18 61 4 79 4 70 12 36 30 35 45 62 4 62 4 54 13 34 62 33 81 63 4 46 4 38 14 33 02 32 25 64 4 30 4 23 15 31 50 30 77 65 4 16 4 08 16 30 06 29 37 66 4 ...

Page 262: ...3 14 71 33 92 33 35 121 7 26 7 16 22 228 05 223 08 72 32 78 32 23 122 7 06 6 97 23 218 24 213 51 73 31 69 31 15 123 6 87 6 78 24 208 90 204 39 74 30 63 30 12 124 6 69 6 59 25 200 00 195 71 75 29 61 29 12 125 6 51 6 42 26 191 53 187 44 76 28 64 28 16 126 6 33 6 25 27 183 46 179 57 77 27 69 27 24 127 6 16 6 08 28 175 77 172 06 78 26 79 26 35 128 6 00 5 92 29 168 44 164 90 79 25 91 25 49 129 5 84 5 7...

Page 263: ...ESIE09 08A Thermistor Resistance Temperature Characteristics Appendix 253 Tank Thermistor R2T NTC curve T C Resistance value 20 197 81 k 0 65 84 k 25 20 k ...

Page 264: ... 0 57V 0 28 PH High pressure MPa VL Low pressure MPa V Voltage V PH Detected Pressure High Side MPa PL Detected Pressure Low Side MPa VH Output Voltage High Side VDC VL Output Voltage Low Side VDC High Pressure PH Low Pressure PL Detected Pressure V3053 Detected Pressure Output Voltage VH VL ...

Page 265: ...ecking failures in power semiconductors mounted on inverter PC board Check the power semiconductors mounted on the inverter PC board by the use of a multiple tester Items to be prepared Multiple tester Prepare the digital type of multiple tester with diode check function Preparation Turn OFF the power supply Then after a lapse of 10 minutes or more make measurement of resistance To make measuremen...

Page 266: ...Method of Replacing the Inverter s Power Transistors Modules ESIE09 08A 256 Appendix Inverter PC board C C W U V ...

Page 267: ... each value variation The following abnormalities are also doubted besides the PC board abnormality Faulty compressor ground fault ground leakage Faulty fan motor ground leakage Tester terminal Criterion Remark C U Not less than 0 3V including It may take time to determine the voltage due to capacitor charge or else V W U C Not less than 0 3V including V W U C 0 3 to 0 7V including V W C U 0 3 to ...

Page 268: ...External Backup Heater Kit ESIE09 08A 258 Appendix 6 External Backup Heater Kit 6 1 Model Name Model Name EKBUHAA6V3 EKBUHAA6W1 ...

Page 269: ...3 2 1 9 10 8 11 No Name 1 Water IN connection 2 Heater E H 3 Water OUT connection 4 Flow switch S1L 5 Air purge 6 Thermal fuse 122 C F1T 7 Contactors K M 8 Thermal protector manual reset 92 C Q1L 9 Overcurrent fuse F B 10 Electrical connections X M 11 Thermal protector self reset 75 C Q2L Flow direction ...

Page 270: ...reset on the heater of the heater kit by pressing the white button for access remove the cover of the kit Caution The electrical box lid must only be opened by a licensed electrician Switch off the power supply before opening the electrical box lid Pressure relief valve In case valves are installed between the indoor unit and the heater kit and between the outlet and the load a pressure relief val...

Page 271: ... 6 Dimensions H x W x D mm 575 x 415 x 170 Weight kg 12 Connections Water inlet G 1 1 4 male Water outlet G 1 1 4 female Maximum water pressure bar 3 Power supply Phase 1 3N Frequency Hz 50 Voltage range Minimum V 220 380 Maximum V 240 415 Voltage tolerance 10 6 Maximum running current A 26 1 8 7 Recommended field fuse A 32 16 ...

Page 272: ...e heat pump Activation of emergency mode is done by changing field setting 8 02 1 Activating the emergency mode will stop the heat pump operation The pump of the indoor unit will be started but heating itself is done by the heater kit If there are no error conditions in leaving or returning water thermistors the heater kit can start to follow emergency operation Note Before activating emergency op...

Page 273: ...T LWT setpoint Step 1 Step 2 TM2 up LWT LWT setpoint 6 RWT LWT setpoint 10 Step 2 Step 1 or LWT LWT setpoint 2 5 RWT LWT setpoint 6 Step 0 Step 2 20 minutes compressor operation Compressor runs on high frequency Pump speed 2500 rpm with E 03 set to default 1 LWT LWT setpoint 8 NORMAL OPERATION BUH assistance Step 0 no BUH operation Step 1 Step 2 TM 1 TM 1 TM 2 TM 2 Note Timer during normal operati...

Page 274: ...15 LWT 55 C Heat request Step 1 Step 2 LWT LWT setpoint 12 LWT 55 C TM1 up 5 minutes Step 2 Step 1 or LWT LWT setpoint 6 5 LWT 65 C Step 1 2 Step 0 Q2L OFF LWT 70 C LWT LWT setpoint 3 5 No heat request EMERGENCY OPERATION Step 0 no BUH operation Step 1 Step 2 TM 1 TM 1 Note The TM indicate timers these start counting down if they are crossed when going from one step over to another step TM1 5 minu...

Page 275: ... power supply and wrongly configured No heater kit installed Troubleshooting Caution Be sure to turn off power switch before connecting or disconnecting connector otherwise parts may be damaged External backup heater connected Set 6 02 to 0 Is the benefit kWh mode in use NO YES YES Properly configure the wiring NO Has the thermal protector Q1L operated YES Check if the circuit is filled with water...

Page 276: ...ESP Pump speed can be too low due to low ESP 2500 rpm Change minimum required pump speed by changing E 03 to 0 BUH not operating Symbol visible on the remote controller There is not enough water flow Check K1A relay Upper light green indicates the relay is powered and that flow 9l min Check for water blockage in the system and filters There is air in the system Check K1A relay If flow is 9 l min f...

Page 277: ...ion E1H E2H Backup heater elements F1B F2B Fuse backup heater 20A 400V F1U Fuse 5A T 250V F1T Thermal fuse backup heater K1A Time relay on delay K1M K2M Contactor backup heater step K5M K6M Contactor for backup heater all pole disconnection S1L Flowswitch Q1L Thermal protector backup heater manual reset Q2L Thermal protector inlet water automatic reset X1M X2M Terminal strip ...

Page 278: ...kup heater elements F1B Fuse backup heater 20A 400V F1U Fuse 5A T 250V F1T Thermal fuse backup heater K1A Time relay on delay K2A Auxilary relay K1M K2M Contactor backup heater step K5M Contactor for backup heater all pole disconnection S1L Flowswitch Q1L Thermal protector backup heater manual reset Q2L Thermal protector inlet water automatic reset X1M X2M Terminal strip ...

Page 279: ...ESIE09 08A External Backup Heater Kit Appendix 269 6 9 Wiring Diagrams EKBUHAA6V3 Power supply Indoor unit Option demand PCB Common BUH step 1 3kW BUH step 2 6kW ...

Page 280: ...ackup heater step K5M K6M Contactor for backup heater all pole disconnection S1L Flowswitch Q1DI Earth leakage protector Q1L Thermal protector backup heater manual reset Q2L Thermal protector inlet water automatic reset R1 Inline resistor for flowswitch X1M X2M Terminal strip X801M PCB terminal strip 1 X1M Main terminal 2 X2M Field wiring terminal 3 Earth wiring 4 Wire number 15 5 Field supply 6 S...

Page 281: ...ESIE09 08A External Backup Heater Kit Appendix 271 EKBUHAA6W1 Power supply Indoor unit Option demand PCB Common BUH step 1 2kW BUH step 2 6kW ...

Page 282: ...Contactor backup heater step K5M Contactor for backup heater all pole disconnection S1L Flowswitch Q1DI Earth leakage protector Q1L Thermal protector backup heater manual reset Q2L Thermal protector inlet water automatic reset R1 Inline resistor for flowswitch X1M X2M Terminal strip X801M PCB terminal strip 1 X1M Main terminal 2 X2M Field wiring terminal 3 Earth wiring 4 Wire number 15 5 Field sup...

Page 283: ...ESIE09 08A 3 Way Valve Appendix 273 7 3 Way Valve 7 1 Build Up of 3 Way Valve Total assembly Legend Actuator assembly No Name 1 Sleeve 2 Valve motor cover 3 Screw 4 Turn knob ...

Page 284: ... right instead of left position Unit is working in DHW mode but 3 way valve is positioned in space heating mode left instead of right position The 3 way valve motor is incorrectly wired to the indoor unit Jumpers settings on the 3 way valve motor PCB are incorrect Verify if 3 way valve motor is wired and set up correctly see page 276 3 way valve motor does not turn The 3 way valve motor is incorre...

Page 285: ...eparate the 3 way valve motor from the body 1 Check the installed motor position A Middle position factory position in case no power has been applied to the valve yet B Left position space heating C Right position domestic hot water Be sure the knob is pushed in completely 2 Remove the knob without changing the position 3 Unscrew the motor from the body Watch out for not losing the screw ...

Page 286: ...the body position matches with the motor position and correct if necessary by turning the white sleeve to by hand 1 Check if the 3 way valve is connected correctly to X2M Verify that the color code of the N Y L wiring at the X2M terminal corresponds with the color code combination mentioned on the 3 way valve motor and if necessary adjust wiring accordingly 2 Remove the cover of the motor to have ...

Page 287: ...4 5 correspond with reference value in different operation modes If not replace main PCB A1P 2 If wiring is correct and output voltages of X2M are correct but motor does not turn when switching from one operation mode to another replace 3 way valve motor In space heating mode X2M 3 4 0V X2M 3 5 230V X2M 4 5 230V In DHW mode X2M 3 4 230V X2M 3 5 230V X2M 4 5 0V 0V 230V 230V 230V 230V 0V ...

Page 288: ...3 Way Valve ESIE09 08A 278 Appendix ...

Page 289: ...9 08A Precautions for New Refrigerant R 410A 279 Part 9 Precautions for New Refrigerant R 410A 1 Precautions for New Refrigerant R 410A 272 1 1 Outline 272 1 2 Refrigerant Cylinders 274 1 3 Service Tools 275 ...

Page 290: ...tropic mixture refrigerant mixture of two or more refrigerants having similar boiling points 3 The design pressure is different at each product Please refer to the installation manual for each product Reference 1 MPa 10 19716 kgf cm2 HFC units Units using new refrigerants HCFC units Refrigerant name R 407C R 410A R 22 Composing substances Non azeotropic mixture of HFC32 HFC125 and HFC134a 1 Quasi ...

Page 291: ...New Refrigerant R 410A 281 Thermodynamic characteristic of R 410A Temperature C Steam pressure kPa Liquid Vapor Density kg m3 Liquid Vapor Specific heat at constant pressure kJ kgK Liquid Vapor Specific enthalpy kJ kg Liquid Vapor Specific entropy kJ KgK Liquid Vapor ...

Page 292: ...ned in high pressure vessels Although those vessels are durable and strong careless handling can cause damage that can lead to unexpected accidents Do not drop vessels let them fall apply impact or roll them on the ground 3 Storage Although R 410A is not flammable it must be stored in a well ventilated cool and dark place in the same way as any other high pressure gases It should also be noted tha...

Page 293: ...ification differs for R 410A and R 407C Charging cylinder Weighting instrument used for HFCs Gas detector The same tool can be used for HFCs Vacuum pump pump with reverse flow preventive function To use existing pump for HFCs vacuum pump adapter must be installed Weighting instrument Charge mouthpiece Seal material is different between R 22 and HFCs Thread specification is different between R 410A...

Page 294: ...pipe extension margin of 0 to 0 5mm was provided for flaring For R 410A air conditioners perform pipe flaring with a pipe extension margin of 1 0 to 1 5mm For clutch type only Conventional tool with pipe extension margin adjustment can be used Flare gauge Nominal size 1 4 3 8 1 2 5 8 3 4 Tube O D Do 6 35 9 52 12 70 15 88 19 05 Class 2 R 410A 9 1 13 2 16 6 19 7 24 0 Class 1 Conventional 9 0 13 0 16...

Page 295: ...eed Maximum degree of vacuum 50 l min 50Hz Select a vacuum pump which is able to keep 60 l min 60Hz the vacuum degree of the system in excess of Suction port UNF7 16 20 1 4 Flare 100 7 kPa 5 torr 755 mmHg UNF1 2 20 5 16 Flare with adapter Differences Equipped with function to prevent reverse oil flow Previous vacuum pump can be used by installing adapter Nominal size Class 1 Class 2 Previous 1 2 2...

Page 296: ...tions Contains synthetic oil therefore it can be used for piping work of every refrigerant cycle Offers high rust resistance and stability over long period of time Differences Can be used for R 410A and R 22 units 6 Gauge manifold for R 410A Specifications High pressure gauge 0 1 to 5 3 MPa 76 cmHg to 53 kg cm2 Low pressure gauge 0 1 to 3 8 MPa 76 cmHg to 38 kg cm2 1 4 5 16 2min 2 5min No oil is u...

Page 297: ...rences Pressure proof hose Change in service port diameter Use of nylon coated material for HFC resistance 8 Charging cylinder Specifications Use weigher for refrigerant charge listed below to charge directly from refrigerant cylinder Differences The cylinder can not be used for mixed refrigerant since mixing ratio is changed during charging When R 410A is charged in liquid state using charging cy...

Page 298: ...ng A manifold with separate ports for HFCs and previous refrigerants is equipped as standard accessories Differences Measurement is based on weight to prevent change of mixing ratio during charging 10 Charge mouthpiece Specifications For R 410A 1 4 5 16 2min 2 5min Material is changed from CR to H NBR Differences Change of thread specification on hose connection side For the R 410A use Change of s...

Page 299: ...Operation Prohibition 69 High Pressure Protection Control 62 High Voltage of Capacitor in Main Inverter Circuit 201 202 I Indoor Unit 8 Inverter Compressor Abnormal 192 193 Inverter Compressor Motor Lock 166 167 Inverter Current Abnormal 194 195 Inverter Protection Control 67 Inverter Start up Error 196 197 J J3 177 178 J5 179 180 J6 181 J7 182 J9 183 JA 184 185 JC 186 187 L L1 188 189 L4 190 191 ...

Page 300: ... Outdoor Unit PC Board Layout 86 Outdoor Unit Thermistors for Discharge Pipe 252 P P1 201 202 PC Board Defect 142 155 156 PCB Layout for EKHBRD 011 014 016 AAV1 32 PJ 203 Power Supply Insufficient or Instantaneous Failure 206 208 Precautions for New Refrigerant R 410A 280 Pressure Sensor 254 Protection Control 62 Pump Error M1P or Other Water System Error 143 Pump down Residual Operation 60 R Refr...

Page 301: ...nsion valve y1e y3e 170 172 malfunction of outdoor unit fan motor 168 malfunction of system refrigerant system address unde fined 218 malfunction of tank thermistor r3t 151 malfunction of thermistor r1t for outdoor air 176 malfunction of thermistor r3t r5t for suction pipe 1 2 179 malfunction of thermistor r3t liquid thermistor r 410a 150 malfunction of thermistor r4t 183 malfunction of thermistor...

Page 302: ...ESIE09 08A iv Drawings Flow Charts T torque wrench 285 troubleshooting by remote control 131 turn power on 79 W weigher for refrigerant charge 288 wired remote control 87 wiring diagrams 233 ...

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