Daikin VRV IV+ User manual
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
Disclaimer
Service manual
2
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
Disclaimer
The present publication is drawn up by way of information only and does not constitute an offer binding upon Daikin Europe N.V.. Daikin
Europe N.V. has compiled the content of this publication to the best of its knowledge. No express or implied warranty is given for the
completeness, accuracy, reliability or fitness for particular purpose of its content and the products and services presented therein.
Specifications are subject to change without prior notice. Daikin Europe N.V. explicitly rejects any liability for any direct or indirect damage, in
the broadest sense, arising from or related to the use and/or interpretation of this publication. All content is copyrighted by Daikin Europe N.V..
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
Version log
Service manual
3
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
Version log
Version code Description Date
ESIE18-14 Document release July 2019
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
Table of contents
Service manual
4
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
Table of contents
1 General operation 7
2 Troubleshooting 9
2.1 To access push buttons and 7-segment display ....................... 9
2.2 To check the error history.......................................................... 9
2.2.1 Via service checker type 3 .......................................... 9
2.2.2 Via the indoor unit remote controller BRC1H.............. 9
2.2.3 Via the outdoor unit..................................................... 10
2.2.4 Via the wired remote control BRC1E .......................... 10
2.2.5 Via the wireless controller BRC4/7 ............................. 11
2.2.6 Via the wired remote control BRC1D .......................... 11
2.3 Error based troubleshooting ...................................................... 12
2.3.1 E1-01 – Outdoor unit main PCB A1P error................. 12
2.3.2 E1-02 – Outdoor unit main PCB A1P error................. 12
2.3.3 E2-01-02-03 – Current leak detection......................... 12
2.3.4 E2-06-07-08 – Open circuit on earth leakage
detection core ............................................................. 13
2.3.5 E3-01-03-05 – Actuation of high pressure switch ....... 13
2.3.6 E3-02-04-06 – High pressure error ............................. 14
2.3.7 E3-07 – High pressure switch reset error ................... 14
2.3.8 E3-13-14-15 – Liquid stop valve check error .............. 14
2.3.9 E3-18 – Actuation of high pressure switch during test
run............................................................................... 15
2.3.10 E3-20-21-22 – Jumper open on main PCB................. 15
2.3.11 E4-01-02-03 – Low pressure error.............................. 15
2.3.12 E5-01-02-03 – Compressor overload error ................. 16
2.3.13 E5-07-08-09 – Compressor overload error ................. 17
2.3.14 E6-17-19-21 – Inverter overcurrent error .................... 17
2.3.15 E6-18-20-22 – Inverter overcurrent error .................... 18
2.3.16 E7-01-13-25 – Outdoor unit fan motor M1F error ....... 18
2.3.17 E7-02-14-26 – Outdoor unit fan motor M2F error ....... 19
2.3.18 E7-05-17-29 – Outdoor unit fan motor M1F
overcurrent error ......................................................... 19
2.3.19 E7-06-18-30 – Outdoor unit fan motor M2F
overcurrent error ......................................................... 19
2.3.20 E7-09-21-33 – Fan inverter PCB A4P (integrated
power module) overheated ......................................... 19
2.3.21 E7-10-22-34 – Fan inverter PCB A7P (integrated
power module) overheated ......................................... 20
2.3.22 E9-01-05-08 – Expansion valve Y1E abnormality ...... 20
2.3.23 E9-03-06-09 – Expansion valve Y2E abnormality ...... 21
2.3.24 E9-04-07-10 – Expansion valve Y3E abnormality ...... 21
2.3.25 E9-20-21-22 – Failure detection on Y1E..................... 22
2.3.26 E9-23-24-25 – Failure detection on Y2E..................... 22
2.3.27 E9-26-27-28 – Expansion valve Y4E abnormality ...... 23
2.3.28 E9-48-49-50 – Expansion valve overcurrent error ...... 23
2.3.29 E9-51-52-53 – Expansion valve thermal cutting error. 24
2.3.30 E9-54-55-56 – Expansion valve defective circuit ........ 24
2.3.31 F3-01-03-05 – Compressor discharge temperature
too high ....................................................................... 25
2.3.32 F3-20-21-22 – Compressor body temperature too
high ............................................................................. 25
2.3.33 F4-01 – Wet operation caution.................................... 26
2.3.34 F6-02 – Refrigerant overcharge detection during
test-run........................................................................ 26
2.3.35 H3-02-04-06 – Transmission error on inverter PCB
A3P ............................................................................. 27
2.3.36 H3-03-05-07 – Transmission error on inverter PCB
A6P ............................................................................. 27
2.3.37 H9-01-02-03 – Ambient temperature thermistor R1T
abnormality ................................................................. 27
2.3.38 HA-00 – Defrost fail alarm........................................... 28
2.3.39 J3-16-22-28 – Discharge thermistor R21T open
circuit........................................................................... 28
2.3.40 J3-17-23-29 – Discharge thermistor R21T short
circuit........................................................................... 28
2.3.41 J3-18-24-30 – Discharge thermistor R22T open
circuit............................................................................ 28
2.3.42 J3-19-25-31 – Discharge thermistor R22T short
circuit............................................................................ 29
2.3.43 J3-38-42-44 – Compressor body thermistor R9T
open circuit................................................................... 29
2.3.44 J3-39-43-45 – Compressor body thermistor R9T
short circuit................................................................... 29
2.3.45 J3-47-49-51 – Compressor body thermistor R8T
open circuit................................................................... 30
2.3.46 J3-48-50-52 – Compressor body thermistor R8T
short circuit................................................................... 30
2.3.47 J3-56-57-58 – High discharge temperature ................. 30
2.3.48 J3-59-60-61 – Discharge thermistor crosswired .......... 31
2.3.49 J5-01-03-05 – Suction thermistor R3T abnormality ..... 31
2.3.50 J6-01-02-03 – De–icer thermistor R7T abnormality..... 31
2.3.51 J7-06-07-08 – Liquid thermistor R5T abnormality........ 32
2.3.52 J8-01-02-03 – Outdoor heat exchanger thermistor
R4T abnormality........................................................... 32
2.3.53 J9-01-02-03 – Gas thermistor R6T abnormality........... 32
2.3.54 JA-06-08-10 – High pressure sensor S1NPH
abnormality .................................................................. 32
2.3.55 JA-07-09-11 – High pressure sensor S1NPH
malfunction................................................................... 33
2.3.56 JC-06-08-10 – Low pressure sensor S1NPL
abnormality .................................................................. 33
2.3.57 JC-07-09-11 – Low pressure sensor S1NPL
abnormality .................................................................. 33
2.3.58 L1-01-07-11 – Inverter PCB A3P abnormality ............. 34
2.3.59 L1-02-08-12 – Inverter PCB A3P current detection
primary circuit............................................................... 34
2.3.60 L1-03-09-13 – Inverter PCB A3P current detection
secondary circuit .......................................................... 34
2.3.61 L1-04-10-14 – Power transistor error on inverter
PCB A3P...................................................................... 35
2.3.62 L1-05-15-16 – Inverter PCB A3P hardware fault ......... 35
2.3.63 L1-17-22-42 – Inverter PCB A6P abnormality ............. 36
2.3.64 L1-18-23-43 – Inverter PCB A6P current detection
primary circuit............................................................... 36
2.3.65 L1-19-24-44 – Inverter PCB A6P current detection
secondary circuit .......................................................... 36
2.3.66 L1-20-25-45 – Power transistor error on inverter
PCB A6P...................................................................... 37
2.3.67 L1-21-26-46 – Inverter PCB A6P hardware fault ......... 37
2.3.68 L1-28-32-34 – Fan inverter PCB A4P Eeprom error.... 37
2.3.69 L1-29-33-35 – Fan inverter PCB A7P Eeprom error.... 38
2.3.70 L1-36-38-40 – Inverter PCB A3P Eeprom error........... 38
2.3.71 L1-37-39-41 – Inverter PCB A6P Eeprom error........... 38
2.3.72 L1-47-49-51 – Inverter PCB A3P 16 V DC abnormal .. 39
2.3.73 L1-48-50-52 – Inverter PCB A6P 16 V DC abnormal .. 39
2.3.74 L2-01-02-03 – Power supply abnormality during test
run................................................................................ 39
2.3.75 L2-04-05-06 – Power supply abnormality during
normal operation .......................................................... 40
2.3.76 L4-01-02-03 – Inverter PCB A3P high fin
temperature.................................................................. 40
2.3.77 L4-06-18-20 – Fan inverter PCB A4P high fin
temperature.................................................................. 40
2.3.78 L4-07-19-21 – Fan inverter PCB A7P high fin
temperature.................................................................. 41
2.3.79 L4-09-10-11 – Inverter PCB A6P high fin
temperature.................................................................. 41
2.3.80 L5-03-05-07 – Output overcurrent detection on
inverter PCB A3P......................................................... 42
2.3.81 L5-14-15-16 – Output overcurrent detection on
inverter PCB A6P......................................................... 42
2.3.82 L8-03-06-07 – Overcurrent on inverter PCB A3P
except start-up ............................................................. 42
2.3.83 L8-11-12-13 – Overcurrent on inverter PCB A6P
except start-up ............................................................. 43
2.3.84 L9-01-05-06 – Stall prevention by inverter PCB A3P... 43
2.3.85 L9-10-11-12 – Stall prevention by inverter PCB A6P... 44
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
Table of contents
Service manual
5
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
2.3.86 L9-13-14-15 – Inverter PCB A3P output phase
abnormality ................................................................. 44
2.3.87 L9-16-17-18 – Inverter PCB A6P output phase
abnormality ................................................................. 44
2.3.88 LC-01 – Transmission abnormality ............................. 45
2.3.89 LC-14-15-16 – Transmission abnormality main PCB/
inverter PCB A3P........................................................ 45
2.3.90 LC-19-20-21 – Transmission abnormality main PCB/
fan inverter PCB A4P.................................................. 45
2.3.91 LC-24-25-26 – Transmission abnormality main PCB/
fan inverter PCB A7P.................................................. 46
2.3.92 LC-30-31-32 – Transmission abnormality main PCB/
inverter PCB A6P........................................................ 46
2.3.93 P1-01-02-03 – Open phase or unbalanced power
supply detection by inverter PCB A3P ........................ 47
2.3.94 P1-07-08-09 – Open phase or unbalanced power
supply detection by inverter PCB A6P ........................ 47
2.3.95 P2-00 – Refrigerant auto-charge interrupted .............. 47
2.3.96 P4-01-04-05 – Fin thermistor abnormality on inverter
PCB A3P..................................................................... 48
2.3.97 P4-02-15-17 – Fin thermistor abnormality on fan
inverter PCB A4P........................................................ 48
2.3.98 P4-03-16-18 – Fin thermistor abnormality on fan
inverter PCB A7P........................................................ 48
2.3.99 P4-06-07-08 – Fin thermistor abnormality on inverter
PCB A6P..................................................................... 49
2.3.100 P8-00 – Freeze-up during refrigerant auto-charge ..... 49
2.3.101 P9-00 – Refrigerant auto-charge finished normally .... 49
2.3.102 PA-00 – No refrigerant in refrigerant cylinder during
auto-charge................................................................. 50
2.3.103 PE-00 – Refrigerant auto-charge in last stage............ 50
2.3.104 PF-00 – Long test run failed........................................ 50
2.3.105 PJ-04-05-06 – Capacity setting mismatch for inverter
PCB A3P..................................................................... 50
2.3.106 PJ-09-15-16 – Capacity setting mismatch for fan
inverter PCB A4P........................................................ 50
2.3.107 PJ-10-17-18 – Capacity setting mismatch for fan
inverter PCB A7P........................................................ 51
2.3.108 PJ-12-13-14 – Capacity setting mismatch for inverter
PCB A6P..................................................................... 51
2.3.109 U0-05 – Refrigerant shortage detection...................... 51
2.3.110 U0-06 – Refrigerant shortage detection...................... 52
2.3.111 U0-08-09-10 – Refrigerant shortage detection by
high pressure sensor .................................................. 52
2.3.112 U1-01-05-07 – Reverse phase detection .................... 53
2.3.113 U1-04-06-08 – Reverse phase detection .................... 53
2.3.114 U2-01-08-11 – Inverter circuit power supply
abnormality - inverter PCB A3P abnormal voltage ..... 53
2.3.115 U2-02-09-12 – Inverter circuit power supply
abnormality - inverter PCB A3P phase loss................ 54
2.3.116 U2-03-10-13 – Inverter circuit power supply
abnormality - inverter PCB A3P DC circuit not
charging ...................................................................... 54
2.3.117 U2-22-25-28 – Inverter circuit power supply
abnormality - inverter PCB A6P abnormal voltage ..... 55
2.3.118 U2-23-26-29 – Inverter circuit power supply
abnormality - inverter PCB A6P phase loss................ 55
2.3.119 U2-24-27-30 – Inverter circuit power supply
abnormality - inverter PCB A6P DC circuit not
charging ...................................................................... 56
2.3.120 U3-02 – Test run interrupted manually ....................... 56
2.3.121 U3-03 – Test run not performed yet............................ 57
2.3.122 U3-04 – Test run ended abnormally ........................... 57
2.3.123 U3-05 – Test run aborted on initial transmission ........ 57
2.3.124 U3-06 – Test run aborted on normal transmission...... 57
2.3.125 U3-07 – Transmission abnormality on test run ........... 58
2.3.126 U3-08 – Transmission abnormality on test run ........... 58
2.3.127 U4-01 – Communication error on Q1-Q2
transmission line ......................................................... 58
2.3.128 U4-03 – Communication error on F1-F2 transmission
line .............................................................................. 58
2.3.129 U4-15 – Unable to start test run.................................. 59
2.3.130 U7-01 – Transmission abnormality between systems
- DTA104A61,62 error.................................................. 59
2.3.131 U7-02 – Transmission abnormality between systems
- DTA104A61,62 error.................................................. 59
2.3.132 U7-03 – Transmission abnormality between main
outdoor unit and sub 1 outdoor unit ............................. 60
2.3.133 U7-04 – Transmission abnormality between main
outdoor unit and sub 2 outdoor unit ............................. 60
2.3.134 U7-05 – Multi system abnormality................................ 60
2.3.135 U7-06 – Multi system address abnormality.................. 61
2.3.136 U7-07 – More than 3 outdoor units on Q1-Q2
transmission................................................................. 61
2.3.137 U7-11 – Excess indoor units detected on test run ....... 61
2.3.138 U7-24 – Duplication of address setting on multiple
DTA104A61,62 installation .......................................... 61
2.3.139 U9-01 – Other indoor unit has error ............................. 61
2.3.140 UA-00 – Combination abnormality ............................... 62
2.3.141 UA-03 – Combination abnormality - Mix of R22,
R407C and R410A type units detected........................ 62
2.3.142 UA-16 – Combination abnormality - More than 64
indoor units detected on same system ........................ 62
2.3.143 UA-17 – Combination abnormality - Local setting
abnormality .................................................................. 62
2.3.144 UA-18 – Combination abnormality - Outdoor unit not
compatible with indoor units (refrigerant type) ............. 63
2.3.145 UA-19 – Combination abnormality - Local set alarm ... 63
2.3.146 UA-20 – Combination abnormality - Non-compatible
outdoor unit in multi-combination ................................. 63
2.3.147 UA-21 – Combination abnormality - BPMK units
detected ....................................................................... 63
2.3.148 UA-31 – Combination abnormality - Multi
combination abnormality .............................................. 63
2.3.149 UA-38 – Combination abnormality - Altherma hydro
unit detected ................................................................ 64
2.3.150 UA-39 – Combination abnormality - Incorrect
combination.................................................................. 64
2.3.151 UA-49 – Combination abnormality - Wrong unit
combination.................................................................. 64
2.3.152 UF-01 – Wiring and piping mismatch - Auto address
inconsistency on F1-F2 transmission........................... 64
2.3.153 UF-05 – Wiring and piping mismatch - Stop valves
closed or incorrect........................................................ 64
2.3.154 UF-11 – Wiring and piping mismatch - Excess
connection ratio............................................................ 65
2.3.155 UH-01-02 – Auto-address failure ................................. 65
2.3.156 E-1 – Refrigerant leak check is not possible................ 65
2.3.157 E-2 – Refrigerant leak check cannot be performed -
indoor air temperature is out of range.......................... 66
2.3.158 E-3 – Refrigerant leak check cannot be performed -
outdoor air temperature is out of range........................ 66
2.3.159 E-4 – Refrigerant leak check is interrupted - too low
pressure is detected..................................................... 66
2.3.160 E-5 – Refrigerant leak check cannot be performed -
a unit which is not compatible with leak detection
function is installed....................................................... 66
2.3.161 NG – Refrigerant leak check function detects
refrigerant leak ............................................................. 66
2.3.162 OK – Refrigerant leak check function detects no
refrigerant leak ............................................................. 67
2.3.163 Indoor unit related error codes..................................... 68
2.3.164 Overview of error codes............................................... 69
2.4 Symptom based troubleshooting................................................ 73
2.4.1 Normal operating conditions ........................................ 73
2.4.2 Symptom: The system does not operate ..................... 73
2.4.3 Symptom: Cool/Heat cannot be changed over ............ 73
2.4.4 Symptom: Fan operation is possible, but cooling and
heating do not work...................................................... 73
2.4.5 Symptom: The fan speed does not correspond to the
setting .......................................................................... 73
2.4.6 Symptom: The fan direction does not correspond to
the setting .................................................................... 73
2.4.7 Symptom: White mist comes out of a unit (Indoor
unit) .............................................................................. 73
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
Table of contents
Service manual
6
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
2.4.8 Symptom: White mist comes out of a unit (Indoor
unit, heat exchanger unit) ........................................... 73
2.4.9 Symptom: The user interface display reads "U4" or
"U5" and stops, but then restarts after a few minutes. 73
2.4.10 Symptom: Noise of air conditioners (Indoor unit)........ 73
2.4.11 Symptom: Noise of air conditioners (Indoor unit,
outdoor unit)................................................................ 74
2.4.12 Symptom: Noise of air conditioners (Outdoor unit) ..... 74
2.4.13 Symptom: Dust comes out of the unit ......................... 74
2.4.14 Symptom: The units can give off odours..................... 74
2.4.15 Symptom: The outdoor unit fan does not spin ............ 74
2.4.16 Symptom: The display shows "88".............................. 74
2.4.17 Symptom: The compressor in the outdoor unit does
not stop after a short heating operation ...................... 74
2.4.18 Symptom: The inside of an outdoor unit is warm
even when the unit has stopped ................................. 74
2.4.19 Symptom: Hot air can be felt when the indoor unit is
stopped ....................................................................... 74
2.4.20 Symptom: Unit operation problems............................. 75
2.4.21 Other symptoms.......................................................... 76
3 Components 77
3.1 4-way valve ............................................................................... 77
3.1.1 Main 4-way valve ........................................................ 77
3.1.2 Sub 4-way valve.......................................................... 80
3.2 Compressor............................................................................... 82
3.2.1 Checking procedures .................................................. 82
3.2.2 Repair procedures ...................................................... 84
3.3 Crankcase heater ...................................................................... 87
3.3.1 Checking procedures .................................................. 87
3.3.2 Repair procedures ...................................................... 87
3.4 Current sensor........................................................................... 88
3.4.1 Checking procedures .................................................. 88
3.4.2 Repair procedures ...................................................... 88
3.5 Expansion valve ........................................................................ 89
3.5.1 Checking procedures .................................................. 89
3.5.2 Repair procedures ...................................................... 90
3.6 Fan inverter PCB....................................................................... 92
3.6.1 Single fan outdoor unit................................................ 92
3.6.2 Double fan outdoor unit............................................... 95
3.7 High pressure switch ................................................................. 97
3.7.1 Checking procedures .................................................. 97
3.7.2 Repair procedures ...................................................... 98
3.8 Inverter PCB.............................................................................. 99
3.8.1 Checking procedures .................................................. 99
3.8.2 Repair procedures ...................................................... 103
3.9 Main PCB .................................................................................. 106
3.9.1 Checking procedures .................................................. 106
3.9.2 Repair procedures ...................................................... 108
3.10 Noise filter PCB ......................................................................... 110
3.10.1 Checking procedures .................................................. 110
3.10.2 Repair procedures ...................................................... 112
3.11 Oil return valve .......................................................................... 112
3.11.1 Checking procedures .................................................. 112
3.11.2 Repair procedures ...................................................... 114
3.12 Outdoor unit fan motor .............................................................. 115
3.12.1 Single fan outdoor unit ................................................ 115
3.12.2 Double fan outdoor unit............................................... 116
3.13 Plate work.................................................................................. 118
3.13.1 To access the switch box on single fan units.............. 118
3.13.2 To access the switch box on double fan units ............ 119
3.13.3 To remove the plate work on single fan units ............. 119
3.13.4 To remove the plate work on double fan units ............ 121
3.14 Reactor ...................................................................................... 123
3.14.1 Checking procedures .................................................. 123
3.14.2 Repair procedures ...................................................... 124
3.15 Refrigerant high pressure sensor .............................................. 124
3.15.1 Checking procedures .................................................. 124
3.15.2 Repair procedures ...................................................... 125
3.16 Refrigerant low pressure sensor ............................................... 126
3.16.1 Checking procedures ...................................................126
3.16.2 Repair procedures .......................................................127
3.17 Thermistors ................................................................................ 128
3.17.1 Refrigerant side thermistors.........................................128
3.17.2 Other thermistors .........................................................130
4 Third party components 130
4.1 Electrical circuit ..........................................................................130
4.1.1 Checking procedures ...................................................130
4.1.2 Repair procedures .......................................................133
4.2 Refrigerant circuit ....................................................................... 133
4.2.1 Checking procedures ...................................................133
4.2.2 Repair procedures .......................................................136
4.3 External factors ..........................................................................138
4.3.1 Checking procedures ...................................................138
4.3.2 Repair procedures .......................................................139
5 Maintenance 140
5.1 Maintenance shedule ................................................................. 140
5.2 Maintenance procedures for outdoor units................................. 140
5.2.1 To check the general status of the unit........................140
5.2.2 To clean the cover plates.............................................140
5.2.3 To clean the outdoor unit heat exchanger ...................141
5.3 Maintenance procedures for indoor units ................................... 142
5.3.1 To check the general status of the unit........................142
5.3.2 To clean the cover plates.............................................142
5.3.3 To clean the indoor unit heat exchanger......................142
Direct expansion: Maintenance – VRV.......................................143
6 Technical data 145
6.1 Detailed information setting mode.............................................. 145
6.1.1 Detailed information setting mode: Outdoor unit..........145
6.1.2 Detailed information setting mode: Remote controller .145
6.2 Wiring diagram ........................................................................... 146
6.2.1 Wiring diagram: Outdoor unit .......................................146
6.3 Piping diagram ...........................................................................148
6.3.1 Piping diagram: Outdoor unit .......................................148
6.3.2 Refrigerant flow diagram: Outdoor unit ........................151
6.4 Component overview..................................................................164
6.4.1 Component overview: RXYQ8~12U units....................164
6.4.2 Component overview: RXYQ14~16U units..................166
6.4.3 Component overview: RXYQ18~20U units..................168
6.4.4 Component overview: RYMQ8~12U units ...................170
6.4.5 Component overview: RYMQ14~16U units .................172
6.4.6 Component overview: RYMQ18~20U units .................174
6.4.7 Component overview: RYYQ8~12U units....................176
6.4.8 Component overview: RYYQ14~16U units..................178
6.4.9 Component overview: RYYQ18~20U units..................180
6.5 Switchbox overview.................................................................... 182
6.5.1 Single fan units ............................................................182
6.5.2 Double fan units ...........................................................182
6.6 Safety devices ............................................................................ 183
6.7 Field information report ..............................................................184
6.8 Service tools............................................................................... 187
6.9 Field settings .............................................................................. 188
6.9.1 To access mode 1 or 2 ................................................188
6.9.2 To use mode 1 .............................................................188
6.9.3 To use mode 2 .............................................................188
6.9.4 Mode 1: Field settings..................................................189
6.9.5 Mode 2: Field settings..................................................191
6.9.6 Overview of field settings for indoor units ....................194
6.9.7 Field settings as per type of indoor unit .......................197
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
1 General operation
Service manual
7
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
1 General operation
The VRV IV+ hp outdoor unit is a heat pump used for cooling or
heating in commercial applications.
Outdoor units
The outdoor unit consists of:
▪ 1 or 2 inverter compressor(s)
▪ A switchbox containing necessary PCBs
▪ A liquid cooling circuit to cool down inverter switchbox
▪ An air cooled heat-exchanger
▪ 3 expansion valves (main, sub-cool and liquid cooling)
▪ 1 or 2 fan motor(s)
▪ Two refrigerant piping connections: gas and liquid.
There are 3 types of outdoor units:
▪ RXYQ-U: VRV IV+ hp, non-continuous Heating
▪ RYYQ-U: VRV IV+ hp, continuous Heating
▪ RYMQ-U: VRV IV+ hp, continuous Heating
RYYQ-U units can ONLY be used as stand-alone units and not in
multi combinations.
RYMQ-U units can ONLY be used in multi combinations and not as
stand-alone units.
Non-continuous heating and continuous heating type units CANNOT
be used together in multi combination.
VRV IV+ hp U-series and T-series cannot be used together in multi
combination.
Up to 3 modules of VRV IV+ hp outdoor units can be connected
using refnet BHFQ22P.
Field piping must be thermally insulated copper piping.
To split the refrigerant circuit between outdoor units and indoor units
(expansion valve kit in case air handling unit and BP branch selector
box in case Split or Sky air units), KHRQ22M refnet branches are
used.
The VRV IV+ hp comes in two different types of outdoor unit casing:
Small casing (8/10/12 HP) Large casing (14/16/18/20 HP)
Heating mode
The compressor capacity step is defined by the condensing
temperature, which is calculated through the high pressure sensor
read-out.
In normal operation, the outdoor unit fan is set to "fan step 7" for
nominal fan speed.
In defrost or oil return operation the heat exchanger functions as a
condenser, while its fan motor(s) and the fan motors of the
operational VRV indoor units are stopped.
Cooling mode
The compressor capacity step is defined by the evaporation
temperature, which is calculated through the low pressure sensor
read-out.
In normal operation the fan step is defined by the condensing
temperature, which is calculated through the high pressure sensor
read-out and ambient temperature thermistor read-out.
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
1 General operation
Service manual
8
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
Indoor Units
The below illustration does not reflect allowed combinations or compatibility. The intention is to give an overview on piping installation for
different types of units.
a
b
a
ccccc
d e f h j k
g
i
aVRV IV+ hp outdoor unit
bRefnet BHFQ22P for Outdoor multi connection
cRefnet KHRQ22M
dVRV indoor unit
eLow temperature Hydrobox
fExpansion valve kit
gAir handling unit
hBranch selector box (BP unit is mandatory if Split/Sky air unit is to be connected)
iSplit/Sky air unit
jHeat reclaim ventilator with DX coil
kAir curtain
VRV systems have combination limits for different types of indoor units and also limits for piping length and connection ratio for each indoor unit
combination pattern. Refer to the Engineering Databook.
The list below is only for reference of compatible units. Always refer to Engineering Databook for compatibility.
Round flow
cassette FXFQ
Floor standing
FXLQ
Fully flat
cassette FXZQ
AHU kit EKEXV
+ EKEQM -
EKEQF
2 Way cassette
FXCQ
Low
temperature
Hydrobox - HXY
Corner cassette
FXKQ
Heat recovery
ventilator VKM
Concealed
ceiling FXDQ
Air curtain
CYVS, CYVM,
CYVL
Concealed
ceiling with
medium ESP -
FXSQ
Concealed
ceiling with high
ESP - FXMQ
Wall mounted
FXAQ
Ceiling
suspended
FXHQ
4 Way ceiling
suspended –
FXUQ
Concealed floor
standing -
FXNQ
Branch selector
box BPMKS
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
2 Troubleshooting
Service manual
9
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
2 Troubleshooting
2.1 To access push buttons and 7-
segment display
1Remove the service plate, see "3.13Plate work"on page118.
Result: The push buttons and 7-segment display are located on
A1P behind the service plate.
b
a
aPush buttons
b7-segment display
2.2 To check the error history
2.2.1 Via service checker type 3
With the service checker, it is possible to monitor not only error
codes but also some common retries and stepping down controls:
▪ Unit error
▪ Error code
▪ High pressure retry
▪ Low pressure retry
▪ Discharge pipe retry
▪ Inverter retry
▪ High pressure stepping down control
▪ Low pressure stepping down control
▪ Over current stepping down control
▪ Fin temperature stepping down control
▪ Compressor discharging stepping down control
2.2.2 Via the indoor unit remote controller
BRC1H
To indicate a system error, the controller displays on the
messages zone (a) of the home screen.
1Press the middle button (b) to enter the main menu from the
home screen.
Result: An error screen (c) is displayed.
b
a
c
2Press the middle button (b) to return to the home screen.
Active error codes are also accessible through the Madoka Assistant
for BRC1H.
The active error (d) is shown on the home screen (e).
e gd f
3Tap the error message (d).
Result: The detail(s) of the error(s) (f) are shown on the
notifications screen (g).
To check the error history with the Madoka Assistant for BRC1H:
4Tap the settings icon (h).
Result: The “Unit settings” screen appears.
h i
5Choose “Errors and warnings” (i).
6The “Errors and warnings” screen appears.
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
2 Troubleshooting
Service manual
10
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
kj
7Choose “Error history” (j).
Result: The “Error history” screen (k) appears.
For more details on the Madoka Assistant please refer to the BRC1H
training course material which is available on the Daikin Business
Portal.
2.2.3 Via the outdoor unit
Error codes and/or retry descriptions are accessible on “Mode 1:
Monitor Mode”.
The table below shows which setting shows the error codes that led
to an outdoor unit forced stop and/or retry.
▪ When an error is generated, the unit performs a forced off until the
error is retrieved.
▪ On retry, the system attempts to stay in operation. Depending on
the type of root cause, after a certain amount of retry attempts, the
unit generates an error.
Retry cause is also visible as an item on the service checker.
Mode Setting Description
Mode 1: Monitor
mode
17 Error code last forced off
18 Error code 2nd last forced off
19 Error code 3rd last forced off
23 Error code last retry
24 Error code 2nd last retry
25 Error code 3rd last retry
Please follow the procedure described below to access the
regarding error code for outdoor unit forced stop and/or retry
description:
Action Result Display
Make sure the 7-
segment display
indication is as during
normal operation.
To enter “Mode 1”,
push the (BS1) button
one time
Mode 1 is accessed.
Push the (BS2)
button as many times
as the setting you
want to go to.
The setting is
accessed (e.g. 17,
Error code last forced
off)
Press the RETURN
(BS3) Button.
Malfunction/Retry
item will appear on
display.
Action Result Display
Press the SET (BS2)
Button.
Detailed Malfunction/
Retry sub-code will
appear on display.
Press SET (BS2)
once again to return
to main Malfunction/
Retry display.
Main Malfunction/
Retry item will appear
on display.
Press the RETURN
(BS3) Button to return
to Home Screen for
“Monitoring Mode”.
Home Screen for
“Monitoring Mode”
will appear on
display.
Press the MODE
(BS1) Button to return
to “Normal Mode”.
Back in normal mode.
2.2.4 Via the wired remote control BRC1E
In case of an error or warning, the operation lamp on the ON/OFF
Button (a) will blink and an error message (b) or warning (c) will be
displayed at the bottom of the screen.
a
d
e
b
c
1Press the Menu/Enter button (d) to see the content of the error/
warning.
Result: The error code (f) appears on the screen.
f
To check the error history with the wired remote control BRC1E:
g
e
2Press and hold the cancel button (e) for 4 seconds or longer
while the backlight of the screen (g) is lit.
Result: The “Service Settings” screen (h) appears.
h
d
3Scroll down to “Error History” and press the Menu/Enter button
(d).
Result: The “Error History” screen (i) appears.
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
2 Troubleshooting
Service manual
11
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
i
d
4Choose “RC Error History” or “Indoor Unit Error History” and
confirm with the Menu/Enter button (d).
j k
Result: RC Error History shows (j) history for all units in case of
group control.
Result: Indoor Unit Error history (k) shows history for the
selected unit.
2.2.5 Via the wireless controller BRC4/7
e
c
d
b
a
g
f
1Press and hold inspection/TEST
button (a) for 5 seconds.
Result: The “unit indication” is
displayed on screen and UNIT No.
(b) is displayed as “0”, blinking.
2Set the UNIT No. via UP/DOWN
buttons (c and d) until a buzzer
sound* is generated from the indoor
unit.
Result: Possible buzzer sounds*:
▪ 3 short beeps; conduct all items of
the following procedure.
▪ 1 short beep; conduct steps 3 & 4.
Continue the operation in step 4 until
the buzzer sounds continuously.
▪ Continuous buzzer; indicates the
error code is confirmed.
3Press the Mode button (e).
Result: The left digit (f) of the error code on display will blink.
4Press UP/DOWN button (c or d) to change the left digit (f) of the
error code.
Result: The left digit (f) changes as indicated below.
“UP” button
“DOWN” button
5Continue to change until the matching buzzer sound** is
generated.
Result: Possible buzzer sounds**:
▪ Continuous buzzer; both digits (f and g) match with the error
code.
▪ 2 short beeps; left digit (f) matches with the error code.
▪ 1 short beep; right digit (g) matches with the error code.
6Press the MODE button (e).
Result: The right digit (g) of the error code on display will blink.
7Press UP/DOWN button (c or d) to change the right digit (g) of
the error code.
Result: The right digit (g) changes as indicated below.
“UP” button
“DOWN” button
8Continue to change until the matching buzzer sound*** is
generated.
Result: Possible buzzer sounds***:
▪ Continuous buzzer; both digits (f and g) match with the error
code.
▪ 2 short beeps; left digit (f) matches with the error code.
▪ 1 short beep; right digit (g) matches with the error code.
INFORMATION
It is not possible to acces the error history with the wireless
controller BRC4/7.
2.2.6 Via the wired remote control BRC1D
If operation stops due to a malfunction, the remote controller’s
operation LED (a) will blink and an error code (b) will be displayed.
The error code will stay available at inspection mode even after
forced off operation or after the error is reset.
The inspection display (c) and error code (b) blink while an error is
active.
a
d
e
c
b
f
To access the error code while in normal operation; follow the
procedure below.
1Press TEST button (d) once.
Result: Error Code (b) for corresponding Unit No (e) will be
displayed.
2Press TEST button (d).
Result: Indoor unit model code will be displayed.
3Press TEST button (d).
Result: Outdoor unit model code will be displayed.
4Press TEST button (d).
Result: Test operation will be displayed.
5Press TEST button (d) for the last time to return to home
screen.
Result: The home screen appears.
To check the malfunction history, you will need to access Mode 40
on the BRC1D. Mode 40 stands for malfunction history display.
6While in home screen, press TEST button (d) for 5 seconds.
Result: Field settings mode is accessed.
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
2 Troubleshooting
Service manual
12
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
7While in field settings mode, press TEST button (d) for 5
seconds.
Result: Mode 40 is accessed.
8Push the temperature set button (f) to change the History No.
(g).
No 1 stands for the latest error.
Result: The History No. (g) and error code (h) are displayed.
gh
9Press TEST button (d) to return to the home screen.
2.3 Error based troubleshooting
2.3.1 E1-01 – Outdoor unit main PCB A1P error
Trigger Effect Reset
Main PCB fails
reading/writing
memory (EEPROM
error).
Unit will stop
operating.
Manual reset via user
interface.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1Perform a check of the main PCB. See "3.9 Main PCB" on
page106.
Possible cause: Faulty main PCB.
2Check if the power supply is conform with the regulations. See
"4.1Electrical circuit"on page130.
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance
>10%),
▪ Power drop,
▪ Short circuit.
3Check the F1‑F2 transmission line between the indoor units and
outdoor unit. See "4.1Electrical circuit"on page130.
Possible cause: Faulty or interruption in transmission line
between indoor units and outdoor unit.
4Perform a power reset. If the error disappears and is raised
again after a while, check for the presence of an external
source causing electrical noise. See "4.3 External factors" on
page138.
Possible cause: External source may cause interference.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.2 E1-02 – Outdoor unit main PCB A1P error
Trigger Effect Reset
Defected main PCB. Unit will stop
operating.
Manual reset via user
interface.
To solve the error code
1Perform a check of the main PCB. See "3.9 Main PCB" on
page106.
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.3 E2-01-02-03 – Current leak detection
Main error code Sub error code Unit
E2 01 Main
02 Sub 1
03 Sub 2
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple
outdoor unit configurations. Main outdoor unit is the unit to
which F1‑F2 IN transmission line is connected. Main, Sub
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger Effect Reset
Main PCB detects
earth leakage through
current sensor
>safety value, see
"6.6Safety
devices"on
page183.
Unit will stop
operating.
Manual reset via user
interface.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1Perform a check of the current sensor. See "3.4 Current
sensor"on page88.
Possible cause: Faulty current sensor.
2Check if the power supply is conform with the regulations. See
"4.1Electrical circuit"on page130.
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance
>10%),
▪ Power drop,
▪ Short circuit.
3Perform a check of the main PCB. See "3.9 Main PCB" on
page106.
Possible cause: Faulty main PCB.
4Using a megger device, check the solenoid valve coils, 4‑way
valve coil, fan motors and compressors if any earth leakage is
found. Replace the component(s) that generate earth leakage.
5Check if the refrigerant circuit is correctly charged. See
"4.2Refrigerant circuit"on page133.
Possible cause: Refrigerant overcharge.
6Check for the presence of humidity in the refrigerant circuit. See
"4.2Refrigerant circuit"on page133.
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
2 Troubleshooting
Service manual
13
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
Possible cause: Humidity in the refrigerant circuit.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.4 E2-06-07-08 – Open circuit on earth
leakage detection core
Main error code Sub error code Unit
E2 06 Main
07 Sub 1
08 Sub 2
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple
outdoor unit configurations. Main outdoor unit is the unit to
which F1‑F2 IN transmission line is connected. Main, Sub
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger Effect Reset
Main PCB detects
open circuit on
connector X101A.
Unit will stop
operating.
Manual reset via user
interface.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1Check that connector X101A is correctly connected to the main
PCB. See "3.9Main PCB"on page106.
Possible cause: Open circuit on connector X101A.
2Perform a check of the current sensor. See "3.4 Current
sensor"on page88.
Possible cause: Faulty current sensor.
3Perform a check of the main PCB. See "3.9 Main PCB" on
page106.
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.5 E3-01-03-05 – Actuation of high pressure
switch
Main error code Sub error code Unit
E3 01 Main
03 Sub 1
05 Sub 2
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple
outdoor unit configurations. Main outdoor unit is the unit to
which F1‑F2 IN transmission line is connected. Main, Sub
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger Effect Reset
High pressure switch
opens due to high
pressure >safety
value, "6.6Safety
devices"on
page183.
Unit will stop
operating.
If field setting 2-15=1
(default): When
pressure drops below
the reset value and
then via the indoor
unit remote controller,
cycle OFF & ON.
If field setting 2-15=0:
When pressure drops
below the reset value
and then pressing
BS3 on main PCB on
outdoor unit, and then
via indoor unit remote
controller, cycle OFF
& ON.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1Check that all stop valves of the refrigerant circuit are open.
See "4.2Refrigerant circuit"on page133.
Possible cause: Closed stop valve in the refrigerant circuit.
2Check the required space around the outdoor unit heat
exchanger. See "4.3External factors"on page138.
Possible cause: Insufficient air flow or air by‑pass due to
required space specifications not met.
3Clean the outdoor heat exchanger. See "5 Maintenance" on
page140.
Possible cause: Dirty outdoor heat exchanger.
4Perform a check of the high pressure switch. See "3.7 High
pressure switch"on page97.
Possible cause: Faulty high pressure switch.
5Check if the refrigerant circuit is correctly charged. See
"4.2Refrigerant circuit"on page133.
Possible cause: Refrigerant overcharge.
6Check for the presence of non‑condensables and/or humidity in
the refrigerant circuit. See "4.2Refrigerant circuit"on page133.
Possible cause: Non‑condensables and/or humidity in the
refrigerant circuit.
7Check if the refrigerant circuit is clogged. See "4.2Refrigerant
circuit"on page133.
Possible cause: Clogged refrigerant circuit.
8Perform a check of the condenser side expansion valve. See
"3.5Expansion valve"on page89.
Possible cause: Faulty condenser side expansion valve.
9Perform a check of the main PCB. See "3.9 Main PCB" on
page106.
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
2 Troubleshooting
Service manual
14
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
2.3.6 E3-02-04-06 – High pressure error
Main error code Sub error code Unit
E3 02 Main
04 Sub 1
06 Sub 2
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple
outdoor unit configurations. Main outdoor unit is the unit to
which F1‑F2 IN transmission line is connected. Main, Sub
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger Effect Reset
High pressure control
(by sensor) active
due to pressure
>safety value certain
times within certain
minutes, see
"6.6Safety
devices"on
page183.
Unit will stop
operating.
If field setting 2-15=1
(default): Via the
indoor unit remote
controller, cycle OFF
& ON.
If field setting 2-15=0:
Press BS3 on main
PCB on outdoor unit,
and then via indoor
unit remote controller,
cycle OFF & ON.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1Check that all stop valves of the refrigerant circuit are open.
See "4.2Refrigerant circuit"on page133.
Possible cause: Closed stop valve in the refrigerant circuit.
2Check the required space around the outdoor unit heat
exchanger. See "4.3External factors"on page138.
Possible cause: Insufficient air flow or air by‑pass due to
required space specifications not met.
3Clean the outdoor heat exchanger. See "5 Maintenance" on
page140.
Possible cause: Dirty outdoor heat exchanger.
4Perform a check of the refrigerant high pressure sensor. See
"3.15Refrigerant high pressure sensor"on page124.
Possible cause: Faulty refrigerant high pressure sensor.
5Check if the refrigerant circuit is correctly charged. See
"4.2Refrigerant circuit"on page133.
Possible cause: Refrigerant overcharge.
6Check for the presence of non‑condensables and/or humidity in
the refrigerant circuit. See "4.2Refrigerant circuit"on page133.
Possible cause: Non‑condensables and/or humidity in the
refrigerant circuit.
7Check if the refrigerant circuit is clogged. See "4.2Refrigerant
circuit"on page133.
Possible cause: Clogged refrigerant circuit.
8Perform a check of the condenser side expansion valve. See
"3.5Expansion valve"on page89.
Possible cause: Faulty condenser side expansion valve.
9Perform a check of the main PCB. See "3.9 Main PCB" on
page106.
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.7 E3-07 – High pressure switch reset error
Trigger Effect Reset
High pressure switch
did not reset and it
stays activated.
Unit will stop
operating.
If field setting 2-15=1
(default): Via the
indoor unit remote
controller, cycle OFF
& ON.
If field setting 2-15=0:
Press BS3 on main
PCB on outdoor unit,
and then via indoor
unit remote controller,
cycle OFF & ON.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1Check that all stop valves of the refrigerant circuit are open.
See "4.2Refrigerant circuit"on page133.
Possible cause: Closed stop valve in the refrigerant circuit.
2Perform a check of the high pressure switch. See "3.7 High
pressure switch"on page97.
Possible cause: Faulty high pressure switch.
3Perform a check of the main PCB. See "3.9 Main PCB" on
page106.
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.8 E3-13-14-15 – Liquid stop valve check
error
Main error code Sub error code Unit
E3 13 Main
14 Sub 1
15 Sub 2
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple
outdoor unit configurations. Main outdoor unit is the unit to
which F1‑F2 IN transmission line is connected. Main, Sub
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger Effect Reset
Pressure builds up
quickly on test run
operation.
Unit will stop test run. Eliminate the cause,
repeat test operation
procedure.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1Check that all stop valves of the refrigerant circuit are open.
See "4.2Refrigerant circuit"on page133.
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
2 Troubleshooting
Service manual
15
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
Possible cause: Closed stop valve in the refrigerant circuit.
2Perform a check of the refrigerant high pressure sensor. See
"3.15Refrigerant high pressure sensor"on page124.
Possible cause: Faulty refrigerant high pressure sensor.
3Check if the refrigerant circuit is correctly charged. See
"4.2Refrigerant circuit"on page133.
Possible cause: Refrigerant overcharge.
4Check for the presence of non‑condensables and/or humidity in
the refrigerant circuit. See "4.2Refrigerant circuit"on page133.
Possible cause: Non‑condensables and/or humidity in the
refrigerant circuit.
5Check if the refrigerant circuit is clogged. See "4.2Refrigerant
circuit"on page133.
Possible cause: Clogged refrigerant circuit.
6Perform a check of the condenser side expansion valve. See
"3.5Expansion valve"on page89.
Possible cause: Faulty condenser side expansion valve.
7Perform a check of the main PCB. See "3.9 Main PCB" on
page106.
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.9 E3-18 – Actuation of high pressure switch
during test run
Trigger Effect Reset
High pressure switch
is activated during
test run.
Unit will stop test run. If field setting 2-15=1
(default): Via the
indoor unit remote
controller, cycle OFF
& ON.
If field setting 2-15=0:
Press BS3 on main
PCB on outdoor unit,
and then via indoor
unit remote controller,
cycle OFF & ON.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1Check that all stop valves of the refrigerant circuit are open.
See "4.2Refrigerant circuit"on page133.
Possible cause: Closed stop valve in the refrigerant circuit.
2Perform a check of the high pressure switch. See "3.7 High
pressure switch"on page97.
Possible cause: Faulty high pressure switch.
3Check if the refrigerant circuit is correctly charged. See
"4.2Refrigerant circuit"on page133.
Possible cause: Refrigerant overcharge.
4Check for the presence of non‑condensables and/or humidity in
the refrigerant circuit. See "4.2Refrigerant circuit"on page133.
Possible cause: Non‑condensables and/or humidity in the
refrigerant circuit.
5Check if the refrigerant circuit is clogged. See "4.2Refrigerant
circuit"on page133.
Possible cause: Clogged refrigerant circuit.
6Perform a check of the condenser side expansion valve. See
"3.5Expansion valve"on page89.
Possible cause: Faulty condenser side expansion valve.
7Perform a check of the main PCB. See "3.9 Main PCB" on
page106.
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.10 E3-20-21-22 – Jumper open on main PCB
Main error code Sub error code Unit
E3 20 Main
21 Sub 1
22 Sub 2
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple
outdoor unit configurations. Main outdoor unit is the unit to
which F1‑F2 IN transmission line is connected. Main, Sub
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger Effect Reset
X4A jumper on main
PCB open.
Unit will stop
operating.
Ensure X4A jumper is
inserted.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1Check that the bridge connector X4A of the main PCB is
correctly connected. See "3.9Main PCB"on page106.
Possible cause: Open jumper X4A on main PCB.
2Perform a check of the high pressure switch. See "3.7 High
pressure switch"on page97.
Possible cause: Faulty high pressure switch.
3Perform a check of the main PCB. See "3.9 Main PCB" on
page106.
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.11 E4-01-02-03 – Low pressure error
Main error code Sub error code Unit
E4 01 Main
02 Sub 1
03 Sub 2
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
2 Troubleshooting
Service manual
16
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple
outdoor unit configurations. Main outdoor unit is the unit to
which F1‑F2 IN transmission line is connected. Main, Sub
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger Effect Reset
Low pressure control
(by sensor) active
due to <safety value
certain times within
certain minutes, see
"6.6Safety
devices"on
page183.
Unit will stop
operating.
Manual reset via user
interface.
Automatic Reset
when Low Pressure
>reset value, see
"6.6Safety
devices"on
page183.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1Check that all stop valves of the refrigerant circuit are open.
See "4.2Refrigerant circuit"on page133.
Possible cause: Closed stop valve in the refrigerant circuit.
2Perform a cross‑wiring check of the F1‑F2 transmission wiring
between the indoor units and outdoor unit. Set field setting 2‑5
of the outdoor unit to 1 to start the indoor units connected to
that outdoor unit on forced fan operation, see "6.9 Field
settings"on page 188. If any other indoor unit (that should be
connected to a different outdoor unit) is operating, this indoor
unit is connected to the wrong outdoor unit (cross‑wired).
Correct the wiring between the indoor unit(s) and outdoor unit.
Possible cause: F1‑F2 transmission wiring is cross‑wired
with another outdoor unit system.
3Check if the refrigerant circuit is correctly charged. See
"4.2Refrigerant circuit"on page133.
Possible cause: Refrigerant shortage.
4Check for the presence of humidity in the refrigerant circuit. See
"4.2Refrigerant circuit"on page133.
Possible cause: Humidity in the refrigerant circuit.
5Check if the refrigerant circuit is clogged. See "4.2Refrigerant
circuit"on page133.
Possible cause: Clogged refrigerant circuit.
6Perform a check of the evaporator side expansion valve. See
"3.5Expansion valve"on page89.
Possible cause: Faulty evaporator side expansion valve.
7Check the required space around the outdoor unit heat
exchanger. See "4.3External factors"on page138.
Possible cause: Insufficient air flow or air by‑pass due to
required space specifications not met.
8Clean the outdoor heat exchanger. See "5 Maintenance" on
page140.
Possible cause: Dirty outdoor heat exchanger.
9Perform a check of the refrigerant low pressure sensor. See
"3.16Refrigerant low pressure sensor"on page126
Possible cause: Faulty refrigerant low pressure sensor.
10 Perform a check of the main PCB. See "3.9 Main PCB" on
page106.
Possible cause: Faulty main PCB.
11 Check the F1‑F2 transmission line between the indoor units and
outdoor unit. See "4.1Electrical circuit"on page130.
Possible cause: Faulty or interruption in transmission line
between indoor units and outdoor unit.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.12 E5-01-02-03 – Compressor overload error
Main error code Sub error code Unit
E5 01 Main
02 Sub 1
03 Sub 2
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple
outdoor unit configurations. Main outdoor unit is the unit to
which F1‑F2 IN transmission line is connected. Main, Sub
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger Effect Reset
Compressor overload
is detected for M1C.
Unit will stop
operating.
Manual reset via user
interface.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1Check that all stop valves of the refrigerant circuit are open.
See "4.2Refrigerant circuit"on page133.
Possible cause: Closed stop valve in the refrigerant circuit.
2Check if the refrigerant circuit is clogged. See "4.2Refrigerant
circuit"on page133.
Possible cause: Clogged refrigerant circuit.
3Perform a check of the oil return valve Y2S. See "3.11Oil return
valve"on page112.
Possible cause: Faulty oil return valve Y2S.
4Perform a check of the oil return valve Y3S. See "3.11Oil return
valve"on page112.
Possible cause: Faulty oil return valve Y3S.
5Perform a check of the oil return valve Y4S. See "3.11Oil return
valve"on page112.
Possible cause: Faulty oil return valve Y4S.
6Check if there are oil traps in the field piping. See installation
manual for piping rules.
Possible cause: Compressor running without oil will draw
higher current and get locked.
7Perform a check of the compressor. See "3.2 Compressor" on
page82.
Possible cause: Faulty compressor.
8Check liquid back issue. Check expansion valve operation. See
"3.5Expansion valve"on page89.
Possible cause: Expansion valve CANNOT keep minimum
superheat of 3K while running as evaporator.
9Check if the refrigerant circuit is correctly charged. See
"4.2Refrigerant circuit"on page133.
Possible cause: Refrigerant shortage.
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
2 Troubleshooting
Service manual
17
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
10 Perform a check of the 4‑way valve. See "3.1 4-way valve"on
page77.
Possible cause: Faulty 4‑way valve.
11 Perform a check of the discharge pipe thermistor. See
"3.17Thermistors"on page128.
Possible cause: Faulty discharge pipe thermistor or
connector fault.
12 Perform a check of the inverter PCB A3P. See "3.8 Inverter
PCB"on page99.
Possible cause: Faulty inverter PCB A3P.
13 Perform a check of the main PCB. See "3.9 Main PCB" on
page106.
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.13 E5-07-08-09 – Compressor overload error
Main error code Sub error code Unit
E5 07 Main
08 Sub 1
09 Sub 2
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple
outdoor unit configurations. Main outdoor unit is the unit to
which F1‑F2 IN transmission line is connected. Main, Sub
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger Effect Reset
Compressor overload
is detected for M2C.
Unit will stop
operating.
Manual reset via user
interface.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1Check that all stop valves of the refrigerant circuit are open.
See "4.2Refrigerant circuit"on page133.
Possible cause: Closed stop valve in the refrigerant circuit.
2Check if the refrigerant circuit is clogged. See "4.2Refrigerant
circuit"on page133.
Possible cause: Clogged refrigerant circuit.
3Perform a check of the oil return valve Y2S. See "3.11Oil return
valve"on page112.
Possible cause: Faulty oil return valve Y2S.
4Perform a check of the oil return valve Y3S. See "3.11Oil return
valve"on page112.
Possible cause: Faulty oil return valve Y3S.
5Perform a check of the oil return valve Y4S. See "3.11Oil return
valve"on page112.
Possible cause: Faulty oil return valve Y4S.
6Check if there are oil traps in the field piping. See installation
manual for piping rules.
Possible cause: Compressor running without oil will draw
higher current and get locked.
7Perform a check of the compressor. See "3.2 Compressor" on
page82.
Possible cause: Faulty compressor.
8Check liquid back issue. Check expansion valve operation. See
"3.5Expansion valve"on page89.
Possible cause: Expansion valve CANNOT keep minimum
superheat of 3K while running as evaporator.
9Check if the refrigerant circuit is correctly charged. See
"4.2Refrigerant circuit"on page133.
Possible cause: Refrigerant shortage.
10 Perform a check of the 4‑way valve. See "3.1 4-way valve"on
page77.
Possible cause: Faulty 4‑way valve.
11 Perform a check of the discharge pipe thermistor. See
"3.17Thermistors"on page128.
Possible cause: Faulty discharge pipe thermistor or
connector fault.
12 Perform a check of the inverter PCB A6P. See "3.8 Inverter
PCB"on page99.
Possible cause: Faulty inverter PCB A6P.
13 Perform a check of the main PCB. See "3.9 Main PCB" on
page106.
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.14 E6-17-19-21 – Inverter overcurrent error
Main error code Sub error code Unit
E6 17 Main
19 Sub 1
21 Sub 2
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple
outdoor unit configurations. Main outdoor unit is the unit to
which F1‑F2 IN transmission line is connected. Main, Sub
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger Effect Reset
Overcurrent on
Inverter PCB A3P for
Compressor M1C.
Unit will stop
operating.
Manual reset via user
interface.
Actual current value
of the compressor is
abnormally high
compared to nominal
current of the
compressor for at
least 30 minutes.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1Perform a check of the refrigerant high pressure sensor. See
"3.15Refrigerant high pressure sensor"on page124.
Possible cause: Faulty refrigerant high pressure sensor.
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
2 Troubleshooting
Service manual
18
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
2Perform a check of the refrigerant low pressure sensor. See
"3.16Refrigerant low pressure sensor"on page126
Possible cause: Faulty refrigerant low pressure sensor.
3Connect a pressure gauge to both high and low pressure
service ports and read the high and low refrigerant pressure.
Connect the service monitoring tool to the unit and compare the
pressure values to the pressure read on the pressure gauges.
In case the service monitoring tool read‑out does NOT
correspond with the pressures read through the pressure
gauges, the main PCB needs to be replaced, see "3.9 Main
PCB"on page106.
4Perform a check of the main PCB. See "3.9 Main PCB" on
page106.
Possible cause: Faulty main PCB.
5Perform a check of the inverter PCB A3P. See "3.8 Inverter
PCB"on page99.
Possible cause: Faulty inverter PCB A3P.
6Perform a check of the compressor. See "3.2 Compressor" on
page82.
Possible cause: Faulty compressor.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.15 E6-18-20-22 – Inverter overcurrent error
Main error code Sub error code Unit
E6 18 Main
20 Sub 1
22 Sub 2
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple
outdoor unit configurations. Main outdoor unit is the unit to
which F1‑F2 IN transmission line is connected. Main, Sub
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger Effect Reset
Overcurrent on
inverter PCB A6P for
compressor M2C.
Unit will stop
operating.
Manual reset via user
interface.
Actual current value
of the compressor is
abnormally high
compared to nominal
current of the
compressor for at
least 30 minutes.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1Perform a check of the refrigerant high pressure sensor. See
"3.15Refrigerant high pressure sensor"on page124.
Possible cause: Faulty refrigerant high pressure sensor.
2Perform a check of the refrigerant low pressure sensor. See
"3.16Refrigerant low pressure sensor"on page126
Possible cause: Faulty refrigerant low pressure sensor.
3Connect a pressure gauge to both high and low pressure
service ports and read the high and low refrigerant pressure.
Connect the service monitoring tool to the unit and compare the
pressure values to the pressure read on the pressure gauges.
In case the service monitoring tool read‑out does NOT
correspond with the pressures read through the pressure
gauges, the main PCB needs to be replaced, see "3.9 Main
PCB"on page106.
4Perform a check of the main PCB. See "3.9 Main PCB" on
page106.
Possible cause: Faulty main PCB.
5Perform a check of the inverter PCB A6P. See "3.8 Inverter
PCB"on page99.
Possible cause: Faulty inverter PCB A6P.
6Perform a check of the compressor. See "3.2 Compressor" on
page82.
Possible cause: Faulty compressor.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.16 E7-01-13-25 – Outdoor unit fan motor M1F
error
Main error code Sub error code Unit
E7 01 Main
13 Sub 1
25 Sub 2
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple
outdoor unit configurations. Main outdoor unit is the unit to
which F1‑F2 IN transmission line is connected. Main, Sub
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger Effect Reset
Malfunction of
rotation detection for
M1F. Careful, there is
no rpm detection. Fan
judgement is based
on logic by current
drawn.
Unit will stop
operating.
Manual reset via user
interface.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1Perform a check of the fan inverter PCB A4P. See "3.6 Fan
inverter PCB"on page92.
Possible cause: Faulty fan inverter PCB A4P.
2Check if power supply cable to fan motor is NOT loose. Check
connector X1A on fan inverter PCB A4P. See "To check the
wiring of the fan inverter PCB" "3.6 Fan inverter PCB" on
page92. Check wire to fan motor M1F.
Possible cause: Faulty power supply cable to fan motor M1F.
3Perform a check of the outdoor unit fan motor M1F. See
"3.12Outdoor unit fan motor"on page115.
Possible cause: Faulty outdoor unit fan motor M1F.
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
2 Troubleshooting
Service manual
19
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.17 E7-02-14-26 – Outdoor unit fan motor M2F
error
Main error code Sub error code Unit
E7 02 Main
14 Sub 1
26 Sub 2
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple
outdoor unit configurations. Main outdoor unit is the unit to
which F1‑F2 IN transmission line is connected. Main, Sub
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger Effect Reset
Malfunction of
rotation detection for
M2F. Careful, there is
no rpm detection. Fan
judgement is based
on logic by current
drawn.
Unit will stop
operating.
Manual reset via user
interface.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1Perform a check of the fan inverter PCB A7P. See "3.6 Fan
inverter PCB"on page92.
Possible cause: Faulty fan inverter PCB A7P.
2Check if power supply cable to fan motor is NOT loose. Check
connector X1A on fan inverter PCB A7P. See "To check the
wiring of the fan inverter PCB" "3.6 Fan inverter PCB" on
page92. Check wire to fan motor M2F.
Possible cause: Faulty power supply cable to fan motor M2F.
3Perform a check of the outdoor unit fan motor M2F. See
"3.12Outdoor unit fan motor"on page115.
Possible cause: Faulty outdoor unit fan motor M2F.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.18 E7-05-17-29 – Outdoor unit fan motor M1F
overcurrent error
Main error code Sub error code Unit
E7 05 Main
17 Sub 1
29 Sub 2
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple
outdoor unit configurations. Main outdoor unit is the unit to
which F1‑F2 IN transmission line is connected. Main, Sub
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger Effect Reset
Overcurrent detected
on outdoor unit fan
motor M1F.
Unit will stop
operating.
Manual reset via user
interface.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1Perform a check of the fan inverter PCB A4P. See "3.6 Fan
inverter PCB"on page92.
Possible cause: Faulty fan inverter PCB A4P.
2Perform a check of the outdoor unit fan motor M1F. See
"3.12Outdoor unit fan motor"on page115.
Possible cause: Faulty outdoor unit fan motor M1F.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.19 E7-06-18-30 – Outdoor unit fan motor M2F
overcurrent error
Main error code Sub error code Unit
E7 06 Main
18 Sub 1
30 Sub 2
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple
outdoor unit configurations. Main outdoor unit is the unit to
which F1‑F2 IN transmission line is connected. Main, Sub
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger Effect Reset
Overcurrent detected
on outdoor unit fan
motor M2F.
Unit will stop
operating.
Manual reset via user
interface.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1Perform a check of the fan inverter PCB A7P. See "3.6 Fan
inverter PCB"on page92.
Possible cause: Faulty fan inverter PCB A7P.
2Perform a check of the outdoor unit fan motor M2F. See
"3.12Outdoor unit fan motor"on page115.
Possible cause: Faulty outdoor unit fan motor M2F.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.20 E7-09-21-33 – Fan inverter PCB A4P
(integrated power module) overheated
Main error code Sub error code Unit
E7 09 Main
21 Sub 1
33 Sub 2
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
2 Troubleshooting
Service manual
20
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple
outdoor unit configurations. Main outdoor unit is the unit to
which F1‑F2 IN transmission line is connected. Main, Sub
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger Effect Reset
Fan inverter PCB
A4P is overheated.
Unit will stop
operating.
Manual reset via user
interface.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1Perform a check of the fan inverter PCB A4P. See "3.6 Fan
inverter PCB"on page92.
Possible cause: Faulty fan inverter PCB A4P.
2Check the required space around the outdoor unit heat
exchanger. See "4.3External factors"on page138.
Possible cause: Insufficient air flow or air by‑pass due to
required space specifications not met.
3Clean the outdoor heat exchanger. See "5 Maintenance" on
page140.
Possible cause: Dirty outdoor heat exchanger.
4Perform a check of the liquid cooling expansion valve. See
"3.5Expansion valve"on page89.
Possible cause: Faulty liquid cooling expansion valve.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.21 E7-10-22-34 – Fan inverter PCB A7P
(integrated power module) overheated
Main error code Sub error code Unit
E7 10 Main
22 Sub 1
34 Sub 2
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple
outdoor unit configurations. Main outdoor unit is the unit to
which F1‑F2 IN transmission line is connected. Main, Sub
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger Effect Reset
Fan inverter PCB
A7P is overheated.
Unit will stop
operating.
Manual reset via user
interface.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1Perform a check of the fan inverter PCB A7P. See "3.6 Fan
inverter PCB"on page92.
Possible cause: Faulty fan inverter PCB A7P.
2Check the required space around the outdoor unit heat
exchanger. See "4.3External factors"on page138.
Possible cause: Insufficient air flow or air by‑pass due to
required space specifications not met.
3Clean the outdoor heat exchanger. See "5 Maintenance" on
page140.
Possible cause: Dirty outdoor heat exchanger.
4Perform a check of the liquid cooling expansion valve. See
"3.5Expansion valve"on page89.
Possible cause: Faulty liquid cooling expansion valve.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.22 E9-01-05-08 – Expansion valve Y1E
abnormality
Main error code Sub error code Unit
E9 01 Main
05 Sub 1
08 Sub 2
INFORMATION
Main, Sub 1 and Sub 2 indications are relevant in multiple
outdoor unit configurations. Main outdoor unit is the unit to
which F1‑F2 IN transmission line is connected. Main, Sub
1 and Sub 2 outdoor units can be identified by field setting
1‑00.
Trigger Effect Reset
Main expansion valve
Y1E malfunction.
Unit will stop
operating.
Power reset at
outdoor unit.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
INFORMATION
When the power is switched ON, the outdoor unit main
PCB checks all expansion valve coil windings by current
check.
1Perform a check of the main PCB. See "3.9 Main PCB" on
page106.
Possible cause: Faulty main PCB.
2Perform a check of the main expansion valve. See
"3.5Expansion valve"on page89.
Possible cause: Faulty main expansion valve.
3Perform a check of all refrigerant side thermistors. See
"3.17Thermistors"on page128.
Possible cause: Faulty refrigerant side thermistor(s).
4Perform a check of the refrigerant low pressure sensor. See
"3.16Refrigerant low pressure sensor"on page126
Possible cause: Faulty refrigerant low pressure sensor.
5Check if the refrigerant circuit is correctly charged. See
"4.2Refrigerant circuit"on page133.
Possible cause: Refrigerant overcharge.
6Check if the power supply is conform with the regulations. See
"4.1Electrical circuit"on page130.
https://daikin-p.ru/catalog/vrv-daikn/naruzhnye-vrv-bloki-daikin
Other manuals for VRV IV+
4
This manual suits for next models
21
Table of contents
Other Daikin Heat Pump manuals
Daikin
Daikin ERQ125A7W1B User manual
Daikin
Daikin Super Multi NX FTXG25JV1BW User manual
Daikin
Daikin FVY71LAVE User manual
Daikin
Daikin RXR28EV1B9 User manual
Daikin
Daikin RXSQ24TAVJU User manual
Daikin
Daikin Altherma F How to use
Daikin
Daikin EHVZ04S18DA6V7 User manual
Daikin
Daikin GYEQ20AN User manual
Daikin
Daikin VRV IV RXYLQ10T7Y1B Series User manual
Daikin
Daikin EKHHE200CV37 Operating instructions
Daikin
Daikin VRV IV+ RXYTQ8U5/U7YF User manual
Daikin
Daikin E Series User manual
Daikin
Daikin DZ16TC0361 User manual
Daikin
Daikin Altherma FWXV15AATV3 User manual
Daikin
Daikin RTSQ10PY1 User manual
Daikin
Daikin LXE10E-A35B Troubleshooting guide
Daikin
Daikin RYYQ10U7Y1B User manual
Daikin
Daikin Si12-992 User manual
Daikin
Daikin ETVX16E6V7 User manual
Daikin
Daikin FVXS71HVMA User manual
Popular Heat Pump manuals by other brands
ICP
ICP WPH324 installation instructions
Airxcel
Airxcel Coleman-Mach 47000 SERIES Installation, operation and maintenance instructions
Enviromax
Enviromax FIREBIRD COMBI C20 manual
Dimplex
Dimplex SIH 40TE Installation and operating instructions
Mitsubishi
Mitsubishi Ecodan installation manual
Vagner Pool
Vagner Pool RAPID Series RM04N Installation and user manual
Jula
Jula 416-067 operating instructions
Carrier
Carrier AQUASNAP JUNIOR 30RA Installation & operation instructions
Panasonic
Panasonic WH-MDF12C6E5 Service manual
Amana
Amana PTH073J35A Installation instructions & owner's manual
Ice-O-Matic
Ice-O-Matic RCA1001 installation manual
Bryant
Bryant 698B Installation and start-up instructions
Carrier
Carrier 50QQ Installation, Start-Up and Service Instructions
Evi
Evi GT-SKR015KBDC-M10 instruction manual
Trane
Trane CONQUEST CGAX Series Installation operation & maintenance
Trane
Trane WCH024C1 Installation operation & maintenance
Immergas
Immergas MAGIS COMBO PLUS 5 Instructions and warnings
Haier
Haier MRVII-S AU282FHERA Design, installation & maintenance instruction