Table of contents
Installer and user reference guide
2
FXMQ-A
VRV system air conditioner
4P701548-1 – 2022.07
Table of contents
1 About the documentation 4
1.1 About this document ...................................................................................................................................................... 4
1.2 Meaning of warnings and symbols................................................................................................................................. 4
2 General safety precautions 6
2.1 For the installer............................................................................................................................................................... 6
2.1.1 General ........................................................................................................................................................... 6
2.1.2 Installation site ............................................................................................................................................... 7
2.1.3 Refrigerant — in case of R410A or R32.......................................................................................................... 7
2.1.4 Electrical ......................................................................................................................................................... 9
3 Specific installer safety instructions 11
For the user 13
4 User safety instructions 14
4.1 General............................................................................................................................................................................ 14
4.2 Instructions for safe operation ....................................................................................................................................... 15
5 About the system 19
5.1 System layout.................................................................................................................................................................. 19
5.2 Information requirements for fan coil units................................................................................................................... 20
6 User interface 21
7 Before operation 22
8 Operation 23
8.1 Operation range.............................................................................................................................................................. 23
8.2 About operation modes.................................................................................................................................................. 23
8.2.1 Basic operation modes................................................................................................................................... 23
8.2.2 Special heating operation modes................................................................................................................... 24
8.3 To operate the system.................................................................................................................................................... 24
9 Energy saving and optimum operation 25
10 Maintenance and service 26
10.1 Precautions for maintenance and service...................................................................................................................... 26
10.2 Cleaning the air filter and air outlet ............................................................................................................................... 27
10.2.1 To clean the air filter ...................................................................................................................................... 27
10.2.2 To clean the air outlet .................................................................................................................................... 27
10.3 Maintenance before a long stop period......................................................................................................................... 28
10.4 Maintenance after a long stop period............................................................................................................................ 28
10.5 About the refrigerant...................................................................................................................................................... 28
11 Troubleshooting 30
11.1 Symptoms that are NOT system malfunctions............................................................................................................... 31
11.1.1 Symptom: The system does not operate....................................................................................................... 31
11.1.2 Symptom: White mist comes out of a unit (Indoor unit) .............................................................................. 32
11.1.3 Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)........................................................ 32
11.1.4 Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes.......... 32
11.1.5 Symptom: Noise of air conditioners (Indoor unit)......................................................................................... 32
11.1.6 Symptom: Noise of air conditioners (Indoor unit, outdoor unit) .................................................................. 32
11.1.7 Symptom: Dust comes out of the unit........................................................................................................... 32
11.1.8 Symptom: The units can give off odours ....................................................................................................... 32
12 Relocation 33
13 Disposal 34
For the installer 35
14 About the box 36
14.1 Indoor unit ...................................................................................................................................................................... 36
14.1.1 To unpack and handle the unit ...................................................................................................................... 36
14.1.2 To remove the accessories from the indoor unit .......................................................................................... 36
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