Table of contents
Installer reference guide
4
EWAA011~016DA + EWYA009~016DA
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P620242-1 – 2020.06
12 Commissioning 185
12.1 Overview: Commissioning .............................................................................................................................................. 185
12.2 Precautions when commissioning .................................................................................................................................. 186
12.3 Checklist before commissioning ..................................................................................................................................... 186
12.4 Checklist during commissioning ..................................................................................................................................... 187
12.4.1 Minimum flow rate......................................................................................................................................... 187
12.4.2 Air purge function........................................................................................................................................... 188
12.4.3 Operation test run.......................................................................................................................................... 189
12.4.4 Actuator test run ............................................................................................................................................ 190
12.4.5 Underfloor heating screed dryout ................................................................................................................. 191
13 Hand-over to the user 195
14 Maintenance and service 196
14.1 Maintenance safety precautions .................................................................................................................................... 196
14.2 Yearly maintenance ........................................................................................................................................................ 196
14.2.1 Yearly maintenance outdoor unit: overview ................................................................................................. 196
14.2.2 Yearly maintenance outdoor unit: instructions............................................................................................. 197
15 Troubleshooting 198
15.1 Overview: Troubleshooting ............................................................................................................................................ 198
15.2 Precautions when troubleshooting ................................................................................................................................ 198
15.3 Solving problems based on symptoms........................................................................................................................... 199
15.3.1 Symptom: The unit is NOT heating or cooling as expected........................................................................... 199
15.3.2 Symptom: The compressor does NOT start................................................................................................... 200
15.3.3 Symptom: The system is making gurgling noises after commissioning ........................................................ 200
15.3.4 Symptom: The pump is blocked..................................................................................................................... 201
15.3.5 Symptom: The pump is making noise (cavitation)......................................................................................... 201
15.3.6 Symptom: The pressure relief valve opens.................................................................................................... 202
15.3.7 Symptom: The water pressure relief valve leaks........................................................................................... 202
15.3.8 Symptom: The space is NOT sufficiently heated at low outdoor temperatures........................................... 203
15.4 Solving problems based on error codes ......................................................................................................................... 203
15.4.1 To display the help text in case of a malfunction .......................................................................................... 203
15.4.2 Error codes of the unit ................................................................................................................................... 204
16 Disposal 208
16.1 To recover refrigerant..................................................................................................................................................... 208
16.1.1 To open the stop valves ................................................................................................................................. 209
16.1.2 To manually open the electronic expansion valves....................................................................................... 209
16.1.3 Recovery mode — In case of 3N~ models (7-segments display) .................................................................. 210
16.1.4 Recovery mode — In case of 1N~ models (7-LEDs display) .......................................................................... 213
17 Technical data 215
17.1 Service space: Outdoor unit ........................................................................................................................................... 216
17.2 Piping diagram: Outdoor unit ......................................................................................................................................... 218
17.3 Wiring diagram: Outdoor unit ........................................................................................................................................ 219
18 Glossary 226
19 Field settings table 227
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