Daikin EHFZ03S18DJ3V, Installer'S Reference Manual

Page: 176 / 212

14 | Troubleshooting
Installer reference guide
176
ERLA EHFZ03S18DJ3V
Daikin Altherma 3 R F
4P596821-1B – 2021.10
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 .................................................................................................................................................... 176
14.2 Precautions when troubleshooting........................................................................................................................................ 176
14.3 Solving problems based on symptoms................................................................................................................................... 177
14.3.1
Symptom: The unit is NOT heating or cooling as expected .................................................................................. 177
14.3.2 Symptom: The compressor does NOT start (space heating or domestic water heating) .................................... 178
14.3.3 Symptom: The system is making gurgling noises after commissioning................................................................ 178
14.3.4 Symptom: The pump is blocked............................................................................................................................. 179
14.3.5 Symptom: The pump is making noise (cavitation) ................................................................................................ 179
14.3.6 Symptom: The pressure relief valve opens ........................................................................................................... 180
14.3.7 Symptom: The water pressure relief valve leaks................................................................................................... 180
14.3.8 Symptom: The space is NOT sufficiently heated at low outdoor temperatures .................................................. 181
14.3.9 Symptom: The pressure at the tapping point is temporarily unusually high ....................................................... 182
14.3.10 Symptom: Decoration panels are pushed away due to a swollen tank................................................................ 182
14.3.11 Symptom: Tank disinfection function is NOT completed correctly (AH-error) .................................................... 182
14.4 Solving problems based on error codes................................................................................................................................. 182
14.4.1
Error codes: Overview............................................................................................................................................ 183
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