Daikin FXFQ20BVEB Installer And User Reference Manual page 3
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- Installation and operation manual (20 pages) ,
- Installation and operation manual (24 pages)
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FXFQ20~125BVEB
VRV system air conditioner
4P561452-1B - 2021.07
8.3
Checklist before commissioning..................................................................................................................................... 43
8.4
To perform a test run...................................................................................................................................................... 43
8.5
Error codes when performing a test run........................................................................................................................ 45
11.1
Piping diagram: Indoor unit ............................................................................................................................................ 48
11.2
Wiring diagram................................................................................................................................................................ 48
11.2.1
Unified wiring diagram legend ....................................................................................................................... 48
12.1
System layout.................................................................................................................................................................. 53
12.2
Information requirements for fan coil units................................................................................................................... 54
15.1
Operating the system ..................................................................................................................................................... 57
15.1.1
About operating the system........................................................................................................................... 57
15.1.2
About cooling, heating, fan only, and automatic operation ......................................................................... 57
15.1.3
About the heating operation.......................................................................................................................... 57
15.1.4
To operate the system ................................................................................................................................... 58
15.2
Using the dry program.................................................................................................................................................... 58
15.2.1
About the dry program................................................................................................................................... 58
15.2.2
To use the dry program.................................................................................................................................. 58
15.3
Adjusting the air flow direction ...................................................................................................................................... 58
15.3.1
About the air flow flap.................................................................................................................................... 58
15.4
Active circulation airflow ................................................................................................................................................ 59
15.4.1
To start the active circulation airflow ............................................................................................................ 59
17.1
Precautions for maintenance and service...................................................................................................................... 62
17.2
Cleaning the air filter, suction grille, air outlet and outside panels............................................................................... 62
17.2.1
To clean the air filter ...................................................................................................................................... 63
17.2.2
To clean the suction grille .............................................................................................................................. 64
17.2.3
To clean the air outlet and outside panels .................................................................................................... 65
17.3
Maintenance after a long stop period............................................................................................................................ 65
17.4
Maintenance before a long stop period......................................................................................................................... 66
17.5
About the refrigerant...................................................................................................................................................... 66
17.6
After-sales service and warranty .................................................................................................................................... 66
17.6.1
Warranty period ............................................................................................................................................. 66
17.6.2
Recommended maintenance and inspection ................................................................................................ 66
17.6.3
Recommended maintenance and inspection cycles ..................................................................................... 67
17.6.4
Shortened maintenance and replacement cycles ......................................................................................... 68
18.1
Symptoms that are NOT system malfunctions............................................................................................................... 70
18.1.1
Symptom: The system does not operate....................................................................................................... 70
18.1.2
Symptom: The fan speed does not correspond to the setting...................................................................... 70
18.1.3
Symptom: The fan direction does not correspond to the setting................................................................. 70
18.1.4
Symptom: White mist comes out of a unit (Indoor unit) .............................................................................. 70
18.1.5
Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)........................................................ 70
18.1.6
Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes.......... 71
18.1.7
Symptom: Noise of air conditioners (Indoor unit)......................................................................................... 71
18.1.8
Symptom: Noise of air conditioners (Indoor unit, outdoor unit) .................................................................. 71
18.1.9
Symptom: Noise of air conditioners (Outdoor unit)...................................................................................... 71
18.1.10 Symptom: Dust comes out of the unit........................................................................................................... 71
18.1.11 Symptom: The units can give off odours ....................................................................................................... 71
18.1.12 Symptom: The outdoor unit fan does not spin.............................................................................................. 71
18.1.14 Symptom: The compressor in the outdoor unit does not stop after a short heating operation ................. 72
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Installer and user reference guide
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