Table of Contents
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Table of contents
Installer and user reference guide
2
Table of contents
1.1
About this document ......................................................................................................................................................
1.2
Meaning of warnings and symbols.................................................................................................................................
2.1
For the installer ...............................................................................................................................................................
2.1.1
General ...........................................................................................................................................................
2.1.2
Installation site ...............................................................................................................................................
2.1.3
Refrigerant - in case of R410A or R32..........................................................................................................
2.1.4
Electrical ......................................................................................................................................................... 10
3.1
Instructions for equipment using R32 refrigerant ......................................................................................................... 14
3.1.1
Installation space requirements..................................................................................................................... 15
4.1
General............................................................................................................................................................................ 17
4.2
Instructions for safe operation ....................................................................................................................................... 18
5.1
System layout.................................................................................................................................................................. 23
5.2
Information requirements for fan coil units................................................................................................................... 24
8.1
Operation range.............................................................................................................................................................. 27
8.2
About operation modes.................................................................................................................................................. 27
8.2.1
Basic operation modes ................................................................................................................................... 27
8.2.2
Special heating operation modes................................................................................................................... 28
8.2.3
Adjusting the airflow direction....................................................................................................................... 28
8.3
To operate the system.................................................................................................................................................... 29
10.1
Precautions for maintenance and service...................................................................................................................... 31
10.2
Cleaning the unit exterior, air filter and suction grille ................................................................................................... 32
10.2.1
To clean the exterior ...................................................................................................................................... 32
10.2.2
To clean the air filter ...................................................................................................................................... 32
10.2.3
To clean the suction grille .............................................................................................................................. 33
10.3
Maintenance before a long stop period......................................................................................................................... 34
10.4
Maintenance after a long stop period............................................................................................................................ 35
10.5
About the refrigerant...................................................................................................................................................... 35
10.5.1
About the refrigerant leakage sensor ............................................................................................................ 36
11.1
Symptoms that are NOT system malfunctions............................................................................................................... 39
11.1.1
Symptom: The system does not operate....................................................................................................... 39
11.1.2
Symptom: The fan speed does not correspond to the setting...................................................................... 39
11.1.3
Symptom: The fan direction does not correspond to the setting................................................................. 39
11.1.4
Symptom: White mist comes out of a unit (Indoor unit) .............................................................................. 40
11.1.5
Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)........................................................ 40
11.1.6
Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes.......... 40
11.1.7
Symptom: Noise of air conditioners (Indoor unit)......................................................................................... 40
11.1.8
Symptom: Noise of air conditioners (Indoor unit, outdoor unit) .................................................................. 40
11.1.9
Symptom: Dust comes out of the unit........................................................................................................... 40
11.1.10 Symptom: The units can give off odours ....................................................................................................... 40
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FXHA-A
VRV system air conditioner
4P673749-1A - 2022.11
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Troubleshooting
