8 | Troubleshooting
User reference guide
54
EWAA004~008D + EWYA004~008D
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P688016-1A – 2022.09
Possible cause Corrective action
Unit is damaged. See "8.1To display the help text in case
of a malfunction"[452].
INFORMATION
When the backup heater takes over the heat load, electricity consumption will be
considerably higher.
8.5 Symptom: The system is making gurgling noises after commissioning
Possible cause Corrective action
There is air in the system. Purge air from the system.
(a)
Incorrect hydraulic balance. To be performed by the installer:
1 Perform hydraulic balancing to
assure that the flow is correctly
distributed between the emitters.
2 If hydraulic balancing is not
sufficient, change the pump
limitation settings ([9-0D] and [9-0E]
if applicable).
Various malfunctions.
Check if or is displayed on the
home screen of the user interface. See
"8.1To display the help text in case of a
malfunction"[452] for more
information about the malfunction.
(a)
We recommend to purge air with the air purge function of the unit (to be performed by
the installer). If you purge air from the heat emitters or collectors, mind the following:
WARNING
Air purging heat emitters or collectors. Before you purge air from heat emitters or
collectors, check if or is displayed on the home screen of the user interface.
▪ If not, you can purge air immediately.
▪ If yes, make sure that the room where you want to purge air is sufficiently
ventilated. Reason: Refrigerant might leak into the water circuit, and
subsequently into the room when you purge air from the heat emitters or
collectors.
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