Troubleshooting; Overview: Troubleshooting; Precautions When Troubleshooting - Daikin Altherma EHFH03S18D 3V Series Installer's Reference Manual

14 Troubleshooting

In this chapter

14.1 Overview: Troubleshooting

14.2 Precautions when troubleshooting

ERLA03D + EHFH03S18D
Daikin Altherma 3 R F
4P596806-1C - 2022.09
INFORMATION
This unit is a heating only model. Therefore, all references to cooling in this
document are NOT applicable.
14.1 Overview: Troubleshooting .................................................................................................................................................... 181
14.2 Precautions when troubleshooting........................................................................................................................................ 181
14.3 Solving problems based on symptoms................................................................................................................................... 182
14.3.1 Symptom: The unit is NOT heating or cooling as expected .................................................................................. 182
14.3.2 Symptom: The compressor does NOT start (space heating or domestic water heating) .................................... 183
14.3.3 Symptom: The system is making gurgling noises after commissioning................................................................ 183
14.3.4 Symptom: The pump is blocked............................................................................................................................. 184
14.3.5 Symptom: The pump is making noise (cavitation) ................................................................................................ 184
14.3.6 Symptom: The pressure relief valve opens ........................................................................................................... 185
14.3.7 Symptom: The water pressure relief valve leaks................................................................................................... 185
14.3.8 Symptom: The space is NOT sufficiently heated at low outdoor temperatures .................................................. 186
14.3.9 Symptom: The pressure at the tapping point is temporarily unusually high ....................................................... 187
14.3.10 Symptom: Decoration panels are pushed away due to a swollen tank................................................................ 187
14.3.11 Symptom: Tank disinfection function is NOT completed correctly (AH-error) .................................................... 187
14.4 Solving problems based on error codes................................................................................................................................. 187
14.4.1 Error codes: Overview............................................................................................................................................ 188
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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