Daikin ERGA04EAV3 - 14 Troubleshooting; 14.2 Precautions when troubleshooting

14 | Troubleshooting
Installer reference guide
256
ERGA04~08EA + EHVH04+08SU18+23EA
Daikin Altherma 3 R F
4P629090-1A – 2021.11
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 .................................................................................................................................................... 256
14.2 Precautions when troubleshooting ........................................................................................................................................ 256
14.3 Solving problems based on symptoms................................................................................................................................... 257
14.3.1 Symptom: The unit is NOT heating or cooling as expected .................................................................................. 257
14.3.2 Symptom: Hot water does NOT reach the desired temperature ......................................................................... 258
14.3.3 Symptom: The compressor does NOT start (space heating or domestic water heating) .................................... 258
14.3.4 Symptom: The system is making gurgling noises after commissioning................................................................ 258
14.3.5 Symptom: The pump is making noise (cavitation) ................................................................................................ 259
14.3.6 Symptom: The pressure relief valve opens ........................................................................................................... 259
14.3.7 Symptom: The water pressure relief valve leaks................................................................................................... 260
14.3.8 Symptom: The space is NOT sufficiently heated at low outdoor temperatures .................................................. 260
14.3.9 Symptom: The pressure at the tapping point is temporarily unusually high ....................................................... 261
14.3.10 Symptom: Decoration panels are pushed away due to a swollen tank................................................................ 261
14.3.11 Symptom: Tank disinfection function is NOT completed correctly (AH-error) .................................................... 261
14.4 Solving problems based on error codes................................................................................................................................. 262
14.4.1 To display the help text in case of a malfunction .................................................................................................. 262
14.4.2 Error codes: Overview............................................................................................................................................ 263
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
WARNING
▪ When carrying out an inspection on the switch box of the unit, ALWAYS make
sure that the unit is disconnected from the mains. Turn off the respective circuit
breaker.
▪ When a safety device was activated, stop the unit and find out why the safety
device was activated before resetting it. NEVER shunt safety devices or change
their values to a value other than the factory default setting. If you are unable to
find the cause of the problem, call your dealer.
DANGER: RISK OF ELECTROCUTION