Name: Daikin RXYQ8U7Y1B
Brand: Daikin
Rating: 4 (1 reviews)

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Service manual

VRV IV+ Heat Pump

English

Service manual

VRV IV+ Heat Pump

RYYQ8U7Y1B*

RYYQ10U7Y1B*

RYYQ12U7Y1B*

RYYQ14U7Y1B*

RYYQ16U7Y1B*

RYYQ18U7Y1B*

RYYQ20U7Y1B*

RYMQ8U7Y1B*

RYMQ10U7Y1B*

RYMQ12U7Y1B*

RYMQ14U7Y1B*

RYMQ16U7Y1B*

RYMQ18U7Y1B*

RYMQ20U7Y1B*

RXYQ8U7Y1B*

RXYQ10U7Y1B*

RXYQ12U7Y1B*

RXYQ14U7Y1B*

RXYQ16U7Y1B*

RXYQ18U7Y1B*

RXYQ20U7Y1B*

https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin

Table of Contents4
General Operation7
Troubleshooting9
To Access Push Buttons and 7-Segment Display9
Via Service Checker Type 39
Via the Indoor Unit Remote Controller BRC1H9
Via the Outdoor Unit10
Via the Wired Remote Control BRC1E10
Via the Wireless Controller BRC4/711
Via the Wired Remote Control BRC1D11
Error Based Troubleshooting12
E1-01 - Outdoor Unit Main PCB A1P Error12
E1-02 - Outdoor Unit Main PCB A1P Error12
E2-01-02-03 - Current Leak Detection12
E2-06-07-08 - Open Circuit on Earth Leakage13
Detection Core13
E3-01-03-05 - Actuation of High Pressure Switch13
E3-02-04-06 - High Pressure Error14
E3-07 - High Pressure Switch Reset Error14
E3-13-14-15 - Liquid Stop Valve Check Error14
E3-18 - Actuation of High Pressure Switch During Test Run15
E3-20-21-22 - Jumper Open on Main PCB15
E4-01-02-03 - Low Pressure Error15
E5-01-02-03 - Compressor Overload Error16
E5-07-08-09 - Compressor Overload Error17
E6-17-19-21 - Inverter Overcurrent Error17
E6-18-20-22 - Inverter Overcurrent Error18
E7-01-13-25 - Outdoor Unit Fan Motor M1F Error18
E7-02-14-26 - Outdoor Unit Fan Motor M2F Error19
E7-05-17-29 - Outdoor Unit Fan Motor M1F19
Overcurrent Error19
E7-06-18-30 - Outdoor Unit Fan Motor M2F19
E7-09-21-33 - Fan Inverter PCB A4P19
Power Module) Overheated19
E7-10-22-34 - Fan Inverter PCB A7P (Integrated Power Module) Overheated20
E9-01-05-08 - Expansion Valve Y1E Abnormality20
E9-03-06-09 - Expansion Valve Y2E Abnormality21
E9-04-07-10 - Expansion Valve Y3E Abnormality21
E9-20-21-22 - Failure Detection on Y1E22
E9-23-24-25 - Failure Detection on Y2E22
E9-26-27-28 - Expansion Valve Y4E Abnormality23
E9-48-49-50 - Expansion Valve Overcurrent Error23
E9-51-52-53 - Expansion Valve Thermal Cutting Error24
E9-54-55-56 - Expansion Valve Defective Circuit24
F3-01-03-05 - Compressor Discharge Temperature too High25
F3-20-21-22 - Compressor Body Temperature too High25
F4-01 - Wet Operation Caution26
F6-02 - Refrigerant Overcharge Detection During Test-Run26
A3P27
A6P27
H9-01-02-03 - Ambient Temperature Thermistor R1T Abnormality27
Defrost Fail Alarm28
J3-16-22-28 - Discharge Thermistor R21T Open Circuit28
J3-17-23-29 - Discharge Thermistor R21T Short Circuit28
J3-18-24-30 - Discharge Thermistor R22T Open Circuit28
J3-19-25-31 - Discharge Thermistor R22T Short Circuit29
J3-38-42-44 - Compressor Body Thermistor R9T Open Circuit29
J3-39-43-45 - Compressor Body Thermistor R9T Short Circuit29
J3-47-49-51 - Compressor Body Thermistor R8T Open Circuit30
J3-48-50-52 - Compressor Body Thermistor R8T Short Circuit30
J3-56-57-58 - High Discharge Temperature30
J3-59-60-61 - Discharge Thermistor Crosswired31
J5-01-03-05 - Suction Thermistor R3T Abnormality31
J6-01-02-03 - De-Icer Thermistor R7T Abnormality31
J7-06-07-08 - Liquid Thermistor R5T Abnormality32
J8-01-02-03 - Outdoor Heat Exchanger Thermistor R4T Abnormality32
J9-01-02-03 - Gas Thermistor R6T Abnormality32
JA-06-08-10 - High Pressure Sensor S1NPH Abnormality32
JA-07-09-11 - High Pressure Sensor S1NPH Malfunction33
JC-06-08-10 - Low Pressure Sensor S1NPL Abnormality33
JC-07-09-11 - Low Pressure Sensor S1NPL Abnormality33
L1-01-07-11 - Inverter PCB A3P Abnormality34
L1-02-08-12 - Inverter PCB A3P Current Detection Primary Circuit34
L1-03-09-13 - Inverter PCB A3P Current Detection Secondary Circuit34
L1-04-10-14 - Power Transistor Error on Inverter PCB A3P35
L1-05-15-16 - Inverter PCB A3P Hardware Fault35
L1-17-22-42 - Inverter PCB A6P Abnormality36
L1-18-23-43 - Inverter PCB A6P Current Detection Primary Circuit36
L1-19-24-44 - Inverter PCB A6P Current Detection Secondary Circuit36
L1-20-25-45 - Power Transistor Error on Inverter PCB A6P37
L1-21-26-46 - Inverter PCB A6P Hardware Fault37
L1-28-32-34 - Fan Inverter PCB A4P Eeprom Error37
L1-29-33-35 - Fan Inverter PCB A7P Eeprom Error38
L1-36-38-40 - Inverter PCB A3P Eeprom Error38
L1-37-39-41 - Inverter PCB A6P Eeprom Error38
L1-47-49-51 - Inverter PCB A3P 16 V DC Abnormal39
L1-48-50-52 - Inverter PCB A6P 16 V DC Abnormal39
L2-01-02-03 - Power Supply Abnormality During Test Run39
L2-04-05-06 - Power Supply Abnormality During Normal Operation40
L4-01-02-03 - Inverter PCB A3P High Fin Temperature40
L4-06-18-20 - Fan Inverter PCB A4P High Fin Temperature40
L4-07-19-21 - Fan Inverter PCB A7P High Fin Temperature41
L4-09-10-11 - Inverter PCB A6P High Fin Temperature41
L5-03-05-07 - Output Overcurrent Detection on Inverter PCB A3P42
L5-14-15-16 - Output Overcurrent Detection on Inverter PCB A6P42
L8-03-06-07 - Overcurrent on Inverter PCB A3P Except Start-Up42
L8-11-12-13 - Overcurrent on Inverter PCB A6P Except Start-Up43
L9-01-05-06 - Stall Prevention by Inverter PCB A3P43
L9-10-11-12 - Stall Prevention by Inverter PCB A6P44
L9-13-14-15 - Inverter PCB A3P Output Phase Abnormality44
L9-16-17-18 - Inverter PCB A6P Output Phase44
Transmission Abnormality45
LC-14-15-16 - Transmission Abnormality Main PCB45
LC-19-20-21 - Transmission Abnormality Main PCB45
LC-24-25-26 - Transmission Abnormality Main PCB46
LC-30-31-32 - Transmission Abnormality Main PCB46
P1-01-02-03 - Open Phase or Unbalanced Power Supply Detection by Inverter PCB A3P47
P1-07-08-09 - Open Phase or Unbalanced Power Supply Detection by Inverter PCB A6P47
P2-00 - Refrigerant Auto-Charge Interrupted47
P4-01-04-05 - Fin Thermistor Abnormality on Inverter PCB A3P48
P4-02-15-17 - Fin Thermistor Abnormality on Fan Inverter PCB A4P48
P4-03-16-18 - Fin Thermistor Abnormality on Fan Inverter PCB A7P48
P4-06-07-08 - Fin Thermistor Abnormality on Inverter PCB A6P49
P8-00 - Freeze-Up During Refrigerant Auto-Charge49
P9-00 - Refrigerant Auto-Charge Finished Normally49
No Refrigerant in Refrigerant Cylinder During Auto-Charge50
Refrigerant Auto-Charge in Last Stage50
2.3.104 PF-00 - Long Test Run Failed50
PJ-04-05-06 - Capacity Setting Mismatch for Inverter PCB A3P50
PJ-09-15-16 - Capacity Setting Mismatch for Fan Inverter PCB A4P50
PJ-10-17-18 - Capacity Setting Mismatch for Fan51
Inverter PCB A7P51
PJ-12-13-14 - Capacity Setting Mismatch for Inverter51
Pcb A6P51
2.3.109 U0-05 - Refrigerant Shortage Detection51
2.3.110 U0-06 - Refrigerant Shortage Detection52
U0-08-09-10 - Refrigerant Shortage Detection by High Pressure Sensor52
2.3.112 U1-01-05-07 - Reverse Phase Detection53
2.3.113 U1-04-06-08 - Reverse Phase Detection53
U2-01-08-11 - Inverter Circuit Power Supply Abnormality - Inverter PCB A3P Abnormal Voltage53
U2-02-09-12 - Inverter Circuit Power Supply Abnormality - Inverter PCB A3P Phase Loss54
U2-03-10-13 - Inverter Circuit Power Supply Abnormality - Inverter PCB A3P DC Circuit Not Charging54
U2-22-25-28 - Inverter Circuit Power Supply Abnormality - Inverter PCB A6P Abnormal Voltage55
U2-23-26-29 - Inverter Circuit Power Supply Abnormality - Inverter PCB A6P Phase Loss55
U2-24-27-30 - Inverter Circuit Power Supply Abnormality - Inverter PCB A6P DC Circuit Not Charging56
2.3.120 U3-02 - Test Run Interrupted Manually56
2.3.121 U3-03 - Test Run Not Performed yet57
2.3.122 U3-04 - Test Run Ended Abnormally57
U3-05 - Test Run Aborted on Initial Transmission57
U3-06 - Test Run Aborted on Normal Transmission57
U3-07 - Transmission Abnormality on Test Run58
U3-08 - Transmission Abnormality on Test Run58
U4-01 - Communication Error on58
Transmission Line58
U4-03 - Communication Error on F1-F2 Transmission Line58
U4-15 - Unable to Start Test Run59
U7-01 - Transmission Abnormality between Systems - DTA104A61,62 Error59
U7-02 - Transmission Abnormality between Systems - DTA104A61,62 Error59
U7-03 - Transmission Abnormality between Main60
Outdoor Unit and Sub 1 Outdoor Unit60
U7-04 - Transmission Abnormality between Main60
Outdoor Unit and Sub 2 Outdoor Unit60
2.3.134 U7-05 - Multi System Abnormality60
2.3.135 U7-06 - Multi System Address Abnormality61
U7-07 - more than 3 Outdoor Units on Q1-Q2 Transmission61
U7-11 - Excess Indoor Units Detected on Test Run61
U7-24 - Duplication of Address Setting on Multiple DTA104A61,62 Installation61
2.3.139 U9-01 - Other Indoor Unit Has Error61
2.3.140 UA-00 - Combination Abnormality62
Combination Abnormality - MIX of R22, R407C and R410A Type Units Detected62
Combination Abnormality - more than 64 Indoor Units Detected on same System62
Combination Abnormality - Local Setting Abnormality62
Combination Abnormality - Outdoor Unit Not Compatible with Indoor Units (Refrigerant Type)63
Combination Abnormality - Local Set Alarm63
Combination Abnormality - Non-Compatible Outdoor Unit in Multi-Combination63
Combination Abnormality - BPMK Units Detected63
Combination Abnormality - Multi Combination Abnormality63
Combination Abnormality - Altherma Hydro Unit Detected64
Combination Abnormality - Incorrect Combination64
Combination Abnormality - Wrong Unit Combination64
Wiring and Piping Mismatch - Auto Address64
Inconsistency on F1-F2 Transmission64
Wiring and Piping Mismatch - Stop Valves Closed or Incorrect64
Wiring and Piping Mismatch - Excess Connection Ratio65
2.3.155 UH-01-02 - Auto-Address Failure65
Refrigerant Leak Check Is Not Possible65
Refrigerant Leak Check Cannot be Performed - Indoor Air Temperature Is out of Range66
Refrigerant Leak Check Cannot be Performed - Outdoor Air Temperature Is out of Range66
Refrigerant Leak Check Is Interrupted - too Low Pressure Is Detected66
Refrigerant Leak Check Cannot be Performed - a Unit Which Is Not Compatible with Leak Detection Function Is Installed66
NG - Refrigerant Leak Check Function Detects Refrigerant Leak66
OK - Refrigerant Leak Check Function Detects no Refrigerant Leak67
2.3.163 Indoor Unit Related Error Codes68
2.3.164 Overview of Error Codes69
Symptom Based Troubleshooting73
Normal Operating Conditions73
Symptom: the System Does Not Operate73
Symptom: Cool/Heat Cannot be Changed over73
Symptom: Fan Operation Is Possible, but Cooling and Heating Do Not Work73
Symptom: the Fan Speed Does Not Correspond to the Setting73
Symptom: the Fan Direction Does Not Correspond to the Setting73
Symptom: White Mist Comes out of a Unit (Indoor Unit)73
Symptom: White Mist Comes out of a Unit (Indoor Unit, Heat Exchanger Unit)73
Symptom: the User Interface Display Reads "U4" or "U5" and Stops, but then Restarts after a few Minutes73
Symptom: Noise of Air Conditioners (Indoor Unit, Outdoor Unit)74
Symptom: Noise of Air Conditioners (Outdoor Unit)74
Symptom: Dust Comes out of the Unit74
Symptom: the Units Can Give off Odours74
Symptom: the Outdoor Unit Fan Does Not Spin74
Symptom: the Display Shows "8874
Symptom: the Compressor in the Outdoor Unit Does Not Stop after a Short Heating Operation74
Symptom: the Inside of an Outdoor Unit Is Warm Even When the Unit Has Stopped74
Symptom: Hot Air Can be Felt When the Indoor Unit Is Stopped74
Symptom: Unit Operation Problems75
Other Symptoms76
Components77
4-Way Valve77
Main 4-Way Valve77
Sub 4-Way Valve80
Compressor82
Checking Procedures82
Repair Procedures84
Crankcase Heater87
Checking Procedures87
Repair Procedures87
Current Sensor88
Checking Procedures88
Repair Procedures88
Expansion Valve89
Checking Procedures89
Repair Procedures90
Fan Inverter PCB92
Single Fan Outdoor Unit92
Double Fan Outdoor Unit95
High Pressure Switch97
Checking Procedures97
Repair Procedures98
Inverter PCB99
Checking Procedures99
Repair Procedures103
Main PCB106
Checking Procedures106
Repair Procedures108
Noise Filter PCB110
Checking Procedures110
Repair Procedures112
Oil Return Valve112
Checking Procedures112
Repair Procedures114
Outdoor Unit Fan Motor115
Single Fan Outdoor Unit115
Double Fan Outdoor Unit116
Plate Work118
To Access the Switch Box on Single Fan Units118
To Access the Switch Box on Double Fan Units119
To Remove the Plate Work on Single Fan Units119
To Remove the Plate Work on Double Fan Units121
Reactor123
Checking Procedures123
Repair Procedures124
Refrigerant High Pressure Sensor124
Checking Procedures124
Repair Procedures125
Refrigerant Low Pressure Sensor126
Checking Procedures126
Repair Procedures127
Thermistors128
Refrigerant Side Thermistors128
Other Thermistors130
Third Party Components130
Electrical Circuit130
Checking Procedures130
Repair Procedures133
Refrigerant Circuit133
Checking Procedures133
Repair Procedures136
External Factors138
Checking Procedures138
Repair Procedures139
Maintenance140
Maintenance Shedule140
Maintenance Procedures for Outdoor Units140
To Check the General Status of the Unit140
To Clean the Cover Plates140
To Clean the Outdoor Unit Heat Exchanger141
Maintenance Procedures for Indoor Units142
To Check the General Status of the Unit142
To Clean the Cover Plates142
To Clean the Indoor Unit Heat Exchanger142
Direct Expansion: Maintenance - VRV143
Technical Data145
Detailed Information Setting Mode145
Detailed Information Setting Mode: Outdoor Unit145
Detailed Information Setting Mode: Remote Controller145
Wiring Diagram146
Wiring Diagram: Outdoor Unit146
Piping Diagram148
Piping Diagram: Outdoor Unit148
Refrigerant Flow Diagram: Outdoor Unit151
Component Overview164
Component Overview: RXYQ8~12U Units164
Component Overview: RXYQ14~16U Units166
Component Overview: RXYQ18~20U Units168
Component Overview: RYMQ8~12U Units170
Component Overview: RYMQ14~16U Units172
Component Overview: RYMQ18~20U Units174
Component Overview: RYYQ8~12U Units176
Component Overview: RYYQ14~16U Units178
Component Overview: RYYQ18~20U Units180
Switchbox Overview182
Single Fan Units182
Double Fan Units182
Safety Devices183
Field Information Report184
Service Tools187
Field Settings188
To Access Mode 1 or 2188
To Use Mode 1188
To Use Mode 2188
Mode 1: Field Settings189
Mode 2: Field Settings191
Overview of Field Settings for Indoor Units194
Field Settings as Per Type of Indoor Unit197

Model	RXYQ8U7Y1B
Category	Heat Pump
Cooling Capacity	8.0 kW
Refrigerant	R-32
Power Supply	50Hz
Noise Level (Outdoor Unit)	56 dB

Daikin RXYQ8U7Y1B Service Manual

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