Daikin Altherma EHYHBH05A Series - Troubleshooting; Overview: Troubleshooting; Precautions When Troubleshooting

15 | Troubleshooting
Installer reference guide
215
EVLQ05+08CA + EHYHBH05A + EHYHBH/X08A + EHYKOMB33AA
Daikin Altherma hybrid heat pump
4P355634-1G – 2022.09
15 Troubleshooting
If a malfunction occurs, is displayed on the home pages. You can press to
display more information about the malfunction.
For the symptoms listed below, you can try to solve the problem yourself. For any
other problem, contact your installer. You can find the contact/helpdesk number
via the user interface.
In this chapter
15.1 Overview: Troubleshooting .................................................................................................................................................... 215
15.2 Precautions when troubleshooting........................................................................................................................................ 215
15.3 Solving problems based on symptoms................................................................................................................................... 216
15.3.1 Symptom: The unit is NOT heating or cooling as expected .................................................................................. 216
15.3.2 Symptom: The compressor does NOT start (space heating or domestic water heating) .................................... 217
15.3.3 Symptom: The pump is making noise (cavitation) ................................................................................................ 217
15.3.4 Symptom: The pressure relief valve opens ........................................................................................................... 218
15.3.5 Symptom: The water pressure relief valve leaks................................................................................................... 218
15.3.6 Symptom: The space is NOT sufficiently heated at low outdoor temperatures .................................................. 218
15.3.7 Symptom: The pressure at the tapping point is temporarily unusually high ....................................................... 219
15.3.8 Symptom: Tank disinfection function is NOT completed correctly (AH-error) .................................................... 219
15.3.9 Symptom: Boiler abnormality detection (HJ-11 error).......................................................................................... 220
15.3.10 Symptom: Boiler/hydrobox combination abnormality (UA-52 error) .................................................................. 220
15.3.11 Symptom: The burner does NOT ignite ................................................................................................................. 220
15.3.12 Symptom: The burner ignites noisily ..................................................................................................................... 221
15.3.13 Symptom: The burner resonates ........................................................................................................................... 221
15.3.14 Symptom: No space heating by the gas boiler ...................................................................................................... 222
15.3.15 Symptom: The power is reduced ........................................................................................................................... 222
15.3.16 Symptom: Space heating does NOT reach the temperature ................................................................................ 222
15.3.17 Symptom: Hot water does NOT reach the temperature (no tank installed) ........................................................ 222
15.3.18 Symptom: Hot water does NOT reach the temperature (tank installed) ............................................................. 223
15.4 Solving problems based on error codes................................................................................................................................. 223
15.4.1 Error codes: Overview............................................................................................................................................ 223
15.1 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.
15.2 Precautions when troubleshooting
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING/SCALDING