Yearly maintenance ........................................................................................................................................................ 241

13.2.1

Yearly maintenance outdoor unit: overview ................................................................................................. 241

13.2.2

Yearly maintenance outdoor unit: instructions............................................................................................. 241

13.2.3

Yearly maintenance indoor unit: overview.................................................................................................... 241

13.2.4

Yearly maintenance indoor unit: instructions ............................................................................................... 241

13.3

To drain the domestic hot water tank............................................................................................................................ 243

13.4

About cleaning the water filter in case of trouble ......................................................................................................... 244

13.4.1

To remove the water filter ............................................................................................................................. 244

13.4.2

To clean the water filter in case of trouble.................................................................................................... 245

13.4.3

To install the water filter ................................................................................................................................ 246

14 Troubleshooting

14.1

Overview: Troubleshooting ............................................................................................................................................ 247

14.2

Precautions when troubleshooting ................................................................................................................................ 247

14.3

Solving problems based on symptoms........................................................................................................................... 248

14.3.1

Symptom: The unit is NOT heating or cooling as expected........................................................................... 248

14.3.2

Symptom: Hot water does NOT reach the desired temperature.................................................................. 248

14.3.3

Symptom: The compressor does NOT start (space heating or domestic water heating) ............................ 249

14.3.4

Symptom: The system is making gurgling noises after commissioning ........................................................ 249

14.3.5

Symptom: The pump is making noise (cavitation)......................................................................................... 250

14.3.6

Symptom: The pressure relief valve opens.................................................................................................... 250

14.3.7

Symptom: The water pressure relief valve leaks........................................................................................... 251

14.3.8

Symptom: The space is NOT sufficiently heated at low outdoor temperatures........................................... 251

14.3.9

Symptom: The pressure at the tapping point is temporarily unusually high................................................ 252

14.3.10 Symptom: Decoration panels are pushed away due to a swollen tank ........................................................ 252

14.3.11 Symptom: Tank disinfection function is NOT completed correctly (AH-error)............................................. 252

14.4

Solving problems based on error codes ......................................................................................................................... 253

14.4.1

To display the help text in case of a malfunction .......................................................................................... 253

14.4.2

Error codes: Overview .................................................................................................................................... 254

15 Disposal

15.1

Overview: Disposal.......................................................................................................................................................... 258

15.2

To pump down ................................................................................................................................................................ 258

16 Technical data

16.1

Piping diagram: Outdoor unit ......................................................................................................................................... 261

16.2

Piping diagram: Indoor unit ............................................................................................................................................ 262

16.3

Wiring diagram: Outdoor unit ........................................................................................................................................ 263

16.4

Wiring diagram: Indoor unit ........................................................................................................................................... 265

16.5

Table 1 - Maximum refrigerant charge allowed in a room: indoor unit ....................................................................... 271

16.6

Table 2 - Minimum floor area: indoor unit.................................................................................................................... 272

16.7

Table 3 - Minimum bottom opening area for natural ventilation: indoor unit ............................................................ 272

16.8

ESP curve: Indoor unit..................................................................................................................................................... 274

17 Glossary

18 Field settings table

Table of contents

247

258

260

275

276

Installer reference guide

Table of Contents