General Safety Precautions; About The Documentation; Meaning Of Warnings And Symbols - Daikin VRV IV+ RYYQ12U7Y1B Series Installer And User Manual

9 Maintenance and service
9.1 Overview: Maintenance and service ......................................... 49
9.2 Maintenance safety precautions................................................ 49
9.2.1 To prevent electrical hazards...................................... 49
9.3 About service mode operation................................................... 49
9.3.1 To use vacuum mode ................................................. 49
9.3.2 To recover refrigerant ................................................. 49
10 Troubleshooting
10.1 Overview: Troubleshooting........................................................ 50
10.2 Solving problems based on error codes.................................... 50
10.3 Error codes: Overview............................................................... 50
11 Disposal
12 Technical data
12.1 Overview: Technical data .......................................................... 54
12.2 Service space: Outdoor unit ...................................................... 54
12.3 Piping diagram: Outdoor unit..................................................... 55
12.4 Wiring diagram: Outdoor unit .................................................... 58
For the user
13 About the system
13.1 System layout............................................................................ 60
14 User interface
15 Before operation
16 Operation
16.1 Operation range ........................................................................ 61
16.2 Operating the system ................................................................ 61
16.2.1 About operating the system ........................................ 61
16.2.2 About cooling, heating, fan only, and automatic
operation ..................................................................... 61
16.2.3 About the heating operation........................................ 61
16.2.4 To operate the system (WITHOUT cool/heat
changeover remote control switch) ............................. 62
16.2.5 To operate the system (WITH cool/heat changeover
remote control switch)................................................. 62
16.3 Using the dry program............................................................... 62
16.3.1 About the dry program ................................................ 62
16.3.2 To use the dry program (WITHOUT cool/heat
changeover remote control switch) ............................. 62
16.3.3 To use the dry program (WITH cool/heat changeover
remote control switch)................................................. 62
16.4 Adjusting the air flow direction................................................... 63
16.4.1 About the air flow flap ................................................. 63
16.5 Setting the master user interface .............................................. 63
16.5.1 About setting the master user interface ...................... 63
16.5.2 To designate the master user interface (VRV DX and
Hydrobox) ................................................................... 63
16.5.3 To designate the master user interface (VRV DX and
RA DX)........................................................................ 63
16.6 About control systems ............................................................... 64
17 Energy saving and optimum operation
17.1 Available main operation methods ............................................ 64
17.2 Available comfort settings ......................................................... 64
18 Maintenance and service
18.1 Maintenance after a long stop period ........................................ 65
18.2 Maintenance before a long stop period ..................................... 65
18.3 About the refrigerant.................................................................. 65
18.4 After-sales service and warranty ............................................... 65
18.4.1 Warranty period .......................................................... 65
18.4.2 Recommended maintenance and inspection.............. 65
18.4.3 Recommended maintenance and inspection cycles... 66
18.4.4 Shortened maintenance and replacement cycles ....... 66
19 Troubleshooting
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1 - 2018.09
49 19.1 Error codes: Overview................................................................ 67
19.2 Symptoms that are NOT system malfunctions ........................... 68
19.2.1 Symptom: The system does not operate ..................... 68
19.2.2 Symptom: Cool/Heat cannot be changed over ............ 68
19.2.3 Symptom: Fan operation is possible, but cooling and
heating do not work...................................................... 68
19.2.4 Symptom: The fan speed does not correspond to the
setting .......................................................................... 68
50 19.2.5 Symptom: The fan direction does not correspond to
the setting .................................................................... 68
19.2.6 Symptom: White mist comes out of a unit (Indoor
unit) .............................................................................. 68
19.2.7 Symptom: White mist comes out of a unit (Indoor
unit, outdoor unit) ......................................................... 68
53
19.2.8 Symptom: The user interface display reads "U4" or
54
"U5" and stops, but then restarts after a few minutes.. 68
19.2.9 Symptom: Noise of air conditioners (Indoor unit)......... 68
19.2.10 Symptom: Noise of air conditioners (Indoor unit,
outdoor unit)................................................................. 68
19.2.11 Symptom: Noise of air conditioners (Outdoor unit) ...... 68
19.2.12 Symptom: Dust comes out of the unit .......................... 68
19.2.13 Symptom: The units can give off odours...................... 68
19.2.14 Symptom: The outdoor unit fan does not spin ............. 68
60
19.2.15 Symptom: The display shows "88"............................... 69
19.2.16 Symptom: The compressor in the outdoor unit does
60
not stop after a short heating operation ....................... 69
19.2.17 Symptom: The inside of an outdoor unit is warm
even when the unit has stopped .................................. 69
60
19.2.18 Symptom: Hot air can be felt when the indoor unit is
60
stopped ........................................................................ 69
20 Relocation
61
21 Disposal
22 Technical data
22.1 Information requirements for Eco Design................................... 69
23 Glossary
1

General safety precautions

1.1

About the documentation

▪ The original documentation is written in English. All other
languages are translations.
▪ The precautions described in this document cover very important
topics, follow them carefully.
▪ The installation of the system, and all activities described in the
installation manual and the installer reference guide MUST be
performed by an authorised installer.
1.1.1

Meaning of warnings and symbols

DANGER
64
Indicates a situation that results in death or serious injury.
DANGER: RISK OF ELECTROCUTION
Indicates a situation that could result in electrocution.
64
DANGER: RISK OF BURNING
Indicates a situation that could result in burning because of
extreme hot or cold temperatures.
DANGER: RISK OF EXPLOSION
Indicates a situation that could result in explosion.
66
1 General safety precautions
Installer and user reference guide
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