Daikin Altherma 3 H HT F - Troubleshooting; Overview: Troubleshooting; Precautions When Troubleshooting

14 | Troubleshooting
Installer reference guide
251
EPRA14~18D + ETVH16SU18+23E
Daikin Altherma 3 H HT F
4P644738-1A – 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 .................................................................................................................................................... 251
14.2 Precautions when troubleshooting ........................................................................................................................................ 251
14.3 Solving problems based on symptoms................................................................................................................................... 252
14.3.1 Symptom: The unit is NOT heating or cooling as expected .................................................................................. 252
14.3.2 Symptom: Hot water does NOT reach the desired temperature ......................................................................... 253
14.3.3 Symptom: The compressor does NOT start (space heating or domestic water heating) .................................... 253
14.3.4 Symptom: The system is making gurgling noises after commissioning................................................................ 254
14.3.5 Symptom: The pump is blocked............................................................................................................................. 254
14.3.6 Symptom: The pump is making noise (cavitation) ................................................................................................ 255
14.3.7 Symptom: The pressure relief valve opens ........................................................................................................... 255
14.3.8 Symptom: The water pressure relief valve leaks................................................................................................... 256
14.3.9 Symptom: The space is NOT sufficiently heated at low outdoor temperatures .................................................. 256
14.3.10 Symptom: The pressure at the tapping point is temporarily unusually high ....................................................... 257
14.3.11 Symptom: Tank disinfection function is NOT completed correctly (AH-error) .................................................... 257
14.4 Solving problems based on error codes................................................................................................................................. 258
14.4.1 To display the help text in case of a malfunction .................................................................................................. 258
14.4.2 Error codes of the unit ........................................................................................................................................... 258
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