Troubleshooting; Overview: Troubleshooting; Precautions When Troubleshooting - Daikin ETVH16UE6V7 Installer's Reference Manual

14 Troubleshooting

In this chapter

14.1 Overview: Troubleshooting

14.2 Precautions when troubleshooting

EPRA14~18D + ETVH16SU18+23E
Daikin Altherma 3 H HT F
4P644738-1D - 2023.10
INFORMATION
This unit is a heating only model. Therefore, all references to cooling in this
document are NOT applicable.
14.1 Overview: Troubleshooting .................................................................................................................................................... 253
14.2 Precautions when troubleshooting........................................................................................................................................ 253
14.3 Solving problems based on symptoms................................................................................................................................... 254
14.3.1 Symptom: The unit is NOT heating or cooling as expected .................................................................................. 254
14.3.2 Symptom: Hot water does NOT reach the desired temperature ......................................................................... 255
14.3.3 Symptom: The compressor does NOT start (space heating or domestic water heating) .................................... 255
14.3.4 Symptom: The system is making gurgling noises after commissioning................................................................ 256
14.3.5 Symptom: The pump is blocked............................................................................................................................. 256
14.3.6 Symptom: The pump is making noise (cavitation) ................................................................................................ 257
14.3.7 Symptom: The pressure relief valve opens ........................................................................................................... 257
14.3.8 Symptom: The water pressure relief valve leaks................................................................................................... 258
14.3.9 Symptom: The space is NOT sufficiently heated at low outdoor temperatures .................................................. 258
14.3.10 Symptom: The pressure at the tapping point is temporarily unusually high ....................................................... 259
14.3.11 Symptom: Tank disinfection function is NOT completed correctly (AH-error) .................................................... 259
14.4 Solving problems based on error codes................................................................................................................................. 260
14.4.1 To display the help text in case of a malfunction.................................................................................................. 260
14.4.2 To check the malfunction history .......................................................................................................................... 260
14.4.3 Error codes of the unit ........................................................................................................................................... 260
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.
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING/SCALDING
14 Troubleshooting
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Installer reference guide
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