To drain the domestic hot water tank............................................................................................................................ 230

13.5

To inspect the inside of the domestic hot water tank ................................................................................................... 231

13.6

About cleaning the water filter in case of trouble ......................................................................................................... 232

13.6.1

To remove the water filter ............................................................................................................................. 232

13.6.2

To clean the water filter in case of trouble.................................................................................................... 233

13.6.3

To install the water filter ................................................................................................................................ 234

14 Troubleshooting

14.1

Overview: Troubleshooting ............................................................................................................................................ 235

14.2

Precautions when troubleshooting ................................................................................................................................ 235

14.3

Solving problems based on symptoms........................................................................................................................... 236

14.3.1

Symptom: The unit is NOT heating or cooling as expected........................................................................... 236

14.3.2

Symptom: Hot water does NOT reach the desired temperature.................................................................. 237

14.3.3

Symptom: The compressor does NOT start (space heating or domestic water heating) ............................ 237

14.3.4

Symptom: The system is making gurgling noises after commissioning ........................................................ 237

14.3.5

Symptom: The pump is making noise (cavitation)......................................................................................... 238

14.3.6

Symptom: The pressure relief valve opens.................................................................................................... 238

14.3.7

Symptom: The water pressure relief valve leaks........................................................................................... 239

14.3.8

Symptom: The space is NOT sufficiently heated at low outdoor temperatures........................................... 239

14.3.9

Symptom: The pressure at the tapping point is temporarily unusually high................................................ 240

14.3.10 Symptom: Decoration panels are pushed away due to a swollen tank ........................................................ 240

14.3.11 Symptom: Tank disinfection function is NOT completed correctly (AH-error)............................................. 240

14.4

Solving problems based on error codes ......................................................................................................................... 241

14.4.1

To display the help text in case of a malfunction .......................................................................................... 241

14.4.2

Error codes: Overview .................................................................................................................................... 242

15 Disposal

15.1

Overview: Disposal.......................................................................................................................................................... 246

15.2

To pump down ................................................................................................................................................................ 246

15.3

To start and stop forced cooling..................................................................................................................................... 247

16 Technical data

16.1

Piping diagram: Outdoor unit ......................................................................................................................................... 249

16.2

Piping diagram: Indoor unit ............................................................................................................................................ 251

16.3

Wiring diagram: Outdoor unit ........................................................................................................................................ 252

16.4

Wiring diagram: Indoor unit ........................................................................................................................................... 254

16.5

Table 1 - Maximum refrigerant charge allowed in a room: indoor unit ....................................................................... 260

16.6

Table 2 - Minimum floor area: indoor unit.................................................................................................................... 261

16.7

Table 3 - Minimum venting opening area for natural ventilation: indoor unit ............................................................ 261

16.8

ESP curve: Indoor unit..................................................................................................................................................... 263

16.9

Technical specifications: Domestic hot water tank........................................................................................................ 263

16.9.1

Test results in accordance with EN12897 (2016) .......................................................................................... 263

16.9.2

Warning label.................................................................................................................................................. 264

17 Glossary

18 Field settings table

Table of contents

235

246

249

265

266

Installer reference guide

Table of Contents