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Installer and user reference guide

Inverter outdoor unit for AHU option kit

and aircurtains

ERA100A7V1B

ERA125A7V1B

ERA140A7V1B

ERA100A7Y1B

ERA125A7Y1B

ERA140A7Y1B

Table of contents

Installer and user reference guide

ERA100~140A7V/Y1B

Inverter outdoor unit for AHU option kit and aircurtains

4P780152-1 – 2024.10

Table of contents

1 About this document 5

1.1 Meaning of warnings and symbols ................................................................................................................................ 5

2 General safety precautions 7

2.1 For the installer .............................................................................................................................................................. 7

2.1.1 General........................................................................................................................................................... 7

2.1.2 Installation site............................................................................................................................................... 8

2.1.3 Refrigerant — in case of R410A or R32......................................................................................................... 8

2.1.4 Electrical......................................................................................................................................................... 10

3 Specific installer safety instructions 12

3.1 Instructions for equipment using R32 refrigerant......................................................................................................... 15

For the user 16

4 User safety instructions 17

4.1 General ........................................................................................................................................................................... 17

4.2 Instructions for safe operation ...................................................................................................................................... 18

5 About the system 22

5.1 System layout ................................................................................................................................................................. 22

6 User interface 24

7 Operation 25

7.1 Before operation ............................................................................................................................................................ 25

7.2 Operation range ............................................................................................................................................................. 25

7.3 Operating the system..................................................................................................................................................... 26

7.3.1 About operating the system.......................................................................................................................... 26

7.3.2 About cooling, heating, fan only, and automatic operation......................................................................... 26

7.3.3 About the heating operation......................................................................................................................... 26

7.3.4 To operate the system (WITHOUT cool/heat changeover remote control switch)..................................... 27

7.3.5 To operate the system (WITH cool/heat changeover remote control switch) ............................................ 27

8 Energy saving and optimum operation 29

8.1 Available main operation methods................................................................................................................................ 29

8.2 Available comfort settings.............................................................................................................................................. 30

9 Maintenance and service 31

9.1 Precautions for maintenance and service ..................................................................................................................... 31

9.2 About the refrigerant ..................................................................................................................................................... 31

9.3 After-sales service .......................................................................................................................................................... 32

9.3.1 Recommended maintenance and inspection ............................................................................................... 32

9.3.2 Recommended maintenance and inspection cycles..................................................................................... 32

9.3.3 Shortened maintenance and replacement cycles......................................................................................... 33

10 Troubleshooting 34

10.1 Error codes: Overview.................................................................................................................................................... 36

10.2 Symptoms that are NOT system malfunctions .............................................................................................................. 38

10.2.1 Symptom: The system does not operate ...................................................................................................... 38

10.2.2 Symptom: Cool/Heat cannot be changed over............................................................................................. 38

10.2.3 Symptom: Fan operation is possible, but cooling and heating do not work................................................ 38

10.2.4 Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)....................................................... 38

10.2.5 Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes......... 38

10.2.6 Symptom: Noise of air conditioners (Indoor unit) ........................................................................................ 38

10.2.7 Symptom: Noise of air conditioners (Indoor unit, outdoor unit) ................................................................. 39

10.2.8 Symptom: Noise of air conditioners (Outdoor unit) ..................................................................................... 39

10.2.9 Symptom: Dust comes out of the unit .......................................................................................................... 39

10.2.10 Symptom: The units can give off odours....................................................................................................... 39

10.2.11 Symptom: The outdoor unit fan does not spin............................................................................................. 39

10.2.12 Symptom: The compressor in the outdoor unit does not stop after a short heating operation................. 39

10.2.13 Symptom: The inside of an outdoor unit is warm even when the unit has stopped................................... 39

11 Relocation 40

12 Disposal 41