Actuator test run ............................................................................................................................................ 248

12.4.5

Underfloor heating screed dryout ................................................................................................................. 249

13 Hand-over to the user

14 Maintenance and service

14.1

Maintenance safety precautions.................................................................................................................................... 254

14.2

Yearly maintenance ........................................................................................................................................................ 255

14.2.1

Yearly maintenance outdoor unit: overview ................................................................................................. 255

14.2.2

Yearly maintenance outdoor unit: instructions............................................................................................. 255

14.2.3

Yearly maintenance indoor unit: overview.................................................................................................... 255

14.2.4

Yearly maintenance indoor unit: instructions ............................................................................................... 255

14.3

To drain the domestic hot water tank............................................................................................................................ 258

14.4

To inspect the inside of the domestic hot water tank ................................................................................................... 259

14.5

About cleaning the water filter in case of trouble ......................................................................................................... 260

14.5.1

To remove the water filter ............................................................................................................................. 260

14.5.2

To clean the water filter in case of trouble.................................................................................................... 261

14.5.3

To install the water filter ................................................................................................................................ 262

15 Troubleshooting

15.1

Overview: Troubleshooting ............................................................................................................................................ 263

15.2

Precautions when troubleshooting ................................................................................................................................ 263

15.3

Solving problems based on symptoms........................................................................................................................... 264

15.3.1

Symptom: The unit is NOT heating or cooling as expected........................................................................... 264

15.3.2

Symptom: Hot water does NOT reach the desired temperature.................................................................. 264

15.3.3

Symptom: The compressor does NOT start (space heating or domestic water heating) ............................ 265

15.3.4

Symptom: The system is making gurgling noises after commissioning ........................................................ 265

15.3.5

Symptom: The pump is blocked..................................................................................................................... 266

15.3.6

Symptom: The pump is making noise (cavitation)......................................................................................... 266

15.3.7

Symptom: The pressure relief valve opens.................................................................................................... 267

15.3.8

Symptom: The water pressure relief valve leaks........................................................................................... 267

15.3.9

Symptom: The space is NOT sufficiently heated at low outdoor temperatures........................................... 268

15.3.10 Symptom: The pressure at the tapping point is temporarily unusually high................................................ 269

15.3.11 Symptom: Tank disinfection function is NOT completed correctly (AH-error)............................................. 269

15.4

Solving problems based on error codes ......................................................................................................................... 269

15.4.1

To display the help text in case of a malfunction .......................................................................................... 270

15.4.2

Error codes: Overview .................................................................................................................................... 270

16 Disposal

16.1

To recover refrigerant..................................................................................................................................................... 275

16.1.1

To open the stop valves ................................................................................................................................. 276

16.1.2

To manually open the electronic expansion valves....................................................................................... 276

16.1.3

Recovery mode - In case of 3N~ models (7-segments display) .................................................................. 277

16.1.4

Recovery mode - In case of 1N~ models (7-LEDs display) .......................................................................... 280

17 Technical data

17.1

Service space: Outdoor unit ........................................................................................................................................... 283

17.2

Piping diagram: Outdoor unit ......................................................................................................................................... 285

17.3

Piping diagram: Indoor unit ............................................................................................................................................ 286

17.4

Wiring diagram: Outdoor unit ........................................................................................................................................ 287

17.5

Wiring diagram: Indoor unit ........................................................................................................................................... 288

17.6

ESP curve: Indoor unit..................................................................................................................................................... 294

17.7

Technical specifications: Domestic hot water tank........................................................................................................ 294

17.7.1

Test results in accordance with EN12897 (2016) .......................................................................................... 294

17.7.2

Warning label.................................................................................................................................................. 295

18 Glossary

19 Field settings table

Table of contents

253

254

263

275

282

296

297

Installer reference guide

Table of Contents