Daikin EWYA006D2V3P Installer's Reference Manual page 199

14 Troubleshooting
In this chapter
14.1 Overview: Troubleshooting
14.2 Precautions when troubleshooting
EWAA004~008D + EWYA004~008D
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P688013-1C – 2023.05
14.1 Overview: Troubleshooting .................................................................................................................................................... 199
14.2 Precautions when troubleshooting........................................................................................................................................ 199
14.3 Solving problems based on symptoms................................................................................................................................... 200
14.3.1 Symptom: The unit is NOT heating or cooling as expected .................................................................................. 200
14.3.2 Symptom: Hot water does NOT reach the desired temperature ......................................................................... 200
14.3.3 Symptom: The compressor does NOT start .......................................................................................................... 201
14.3.4 Symptom: The system is making gurgling noises after commissioning................................................................ 201
14.3.5 Symptom: The pump is blocked............................................................................................................................. 202
14.3.6 Symptom: The pump is making noise (cavitation) ................................................................................................ 203
14.3.7 Symptom: The pressure relief valve opens ........................................................................................................... 203
14.3.8 Symptom: The water pressure relief valve leaks................................................................................................... 203
14.3.9 Symptom: The space is NOT sufficiently heated at low outdoor temperatures .................................................. 204
14.3.10 Symptom: The pressure at the tapping point is temporarily unusually high ....................................................... 204
14.4 Solving problems based on error codes................................................................................................................................. 204
14.4.1 To display the help text in case of a malfunction.................................................................................................. 205
14.4.2 Error codes of the unit ........................................................................................................................................... 205
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
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.
14 Troubleshooting
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Installer reference guide
199