Daikin Altherma 3 H HT - Troubleshooting; 14.1 Overview: Troubleshooting; 14.2 Precautions when troubleshooting

14 | Troubleshooting
Installer reference guide
236
EPRA14~18D + ETVZ16S18+23E
Daikin Altherma 3 H HT F
4P644739-1A – 2022.03
14 Troubleshooting
INFORMATION
This unit is a heating only model. Therefore, all references to cooling in this
document are NOT applicable.
In this chapter
14.1 Overview: Troubleshooting .................................................................................................................................................... 236
14.2 Precautions when troubleshooting ........................................................................................................................................ 236
14.3 Solving problems based on symptoms................................................................................................................................... 237
14.3.1 Symptom: The unit is NOT heating or cooling as expected .................................................................................. 237
14.3.2 Symptom: Hot water does NOT reach the desired temperature ......................................................................... 238
14.3.3 Symptom: The compressor does NOT start (space heating or domestic water heating) .................................... 238
14.3.4 Symptom: The system is making gurgling noises after commissioning................................................................ 239
14.3.5 Symptom: The pump is blocked............................................................................................................................. 239
14.3.6 Symptom: The pump is making noise (cavitation) ................................................................................................ 240
14.3.7 Symptom: The pressure relief valve opens ........................................................................................................... 240
14.3.8 Symptom: The water pressure relief valve leaks................................................................................................... 241
14.3.9 Symptom: The space is NOT sufficiently heated at low outdoor temperatures .................................................. 241
14.3.10 Symptom: The pressure at the tapping point is temporarily unusually high ....................................................... 242
14.3.11 Symptom: Tank disinfection function is NOT completed correctly (AH-error) .................................................... 242
14.4 Solving problems based on error codes................................................................................................................................. 243
14.4.1 To display the help text in case of a malfunction .................................................................................................. 243
14.4.2 Error codes of the unit ........................................................................................................................................... 243
14.1 Overview: Troubleshooting
This chapter describes what you have to do in case of problems.
It contains information about:
▪ Solving problems based on symptoms
▪ Solving problems based on error codes
Before troubleshooting
Carry out a thorough visual inspection of the unit and look for obvious defects such
as loose connections or defective wiring.
14.2 Precautions when troubleshooting
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING/SCALDING