Table of Contents
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Table of contents
Installer and user reference guide
2
Table of contents
1.1
About this document ......................................................................................................................................................
2.1
About the documentation ..............................................................................................................................................
2.1.1
Meaning of warnings and symbols ................................................................................................................
2.2
For the installer ...............................................................................................................................................................
2.2.1
General ...........................................................................................................................................................
2.2.2
Installation site ...............................................................................................................................................
2.2.3
Refrigerant - in case of R410A or R32..........................................................................................................
2.2.4
Electrical .........................................................................................................................................................
3.1
Instructions for equipment using R32 refrigerant ......................................................................................................... 14
3.1.1
Installation space requirements..................................................................................................................... 16
4.1
General............................................................................................................................................................................ 18
4.2
Instructions for safe operation ....................................................................................................................................... 19
5.1
System layout.................................................................................................................................................................. 24
5.2
Information requirements for fan coil units................................................................................................................... 25
8.1
Operation range.............................................................................................................................................................. 28
8.2
About operation modes.................................................................................................................................................. 28
8.2.1
Basic operation modes ................................................................................................................................... 28
8.2.2
Special heating operation modes................................................................................................................... 29
8.3
To operate the system.................................................................................................................................................... 29
10.1
Precautions for maintenance and service...................................................................................................................... 31
10.2
Cleaning the air filter and air outlet ............................................................................................................................... 32
10.2.1
To clean the air filter ...................................................................................................................................... 32
10.2.2
To clean the air outlet .................................................................................................................................... 33
10.3
Maintenance before a long stop period......................................................................................................................... 33
10.4
Maintenance after a long stop period............................................................................................................................ 34
10.5
About the refrigerant...................................................................................................................................................... 34
10.5.1
About the refrigerant leakage sensor ............................................................................................................ 35
11.1
Symptoms that are NOT system malfunctions............................................................................................................... 38
11.1.1
Symptom: The system does not operate....................................................................................................... 38
11.1.2
Symptom: White mist comes out of a unit (Indoor unit) .............................................................................. 39
11.1.3
Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)........................................................ 39
11.1.4
Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes.......... 39
11.1.5
Symptom: Noise of air conditioners (Indoor unit)......................................................................................... 39
11.1.6
Symptom: Noise of air conditioners (Indoor unit, outdoor unit) .................................................................. 39
11.1.7
Symptom: Dust comes out of the unit........................................................................................................... 39
11.1.8
Symptom: The units can give off odours ....................................................................................................... 39
For the installer
4
4
5
5
5
6
6
7
7
9
12
17
18
24
26
27
28
30
31
37
40
41
42
FXMA-A
VRV system air conditioner
4P680920-1 - 2022.01
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Troubleshooting
