Symptom: The System Is Making Gurgling Noises After Commissioning; Symptom: The Pump Is Blocked - Daikin ETVH16UE6V7 Installer's Reference Manual

14 | Troubleshooting

14.3.4 Symptom: The system is making gurgling noises after commissioning

14.3.5 Symptom: The pump is blocked

Installer reference guide
256
Possible cause
There is air in the system.
Incorrect hydraulic balance.
Various malfunctions.
(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
▪
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.
Possible causes
If the unit has been powered off for a
long time, lime might block the rotor of
the pump.
(a)
If you cannot deblock the rotor of the pump with this method, you will need to
disassemble the pump and turn the rotor by hand.
Purge air from the system.
To be performed by the installer:
1 Perform hydraulic balancing to
assure that the flow is correctly
distributed between the emitters.
2 If hydraulic
sufficient,
limitation settings ([9-0D] and [9-0E]
if applicable).
Check if
home screen of the user interface. See
"14.4.1 To display the help text in case
of a malfunction" [
information about the malfunction.
or is displayed on the home screen of the user interface.
Remove the screw of the stator housing
and use a screwdriver to turn back and
forth the ceramic shaft of the rotor until
the rotor is deblocked.
Note: Do NOT use excessive force.
1
3
2
Corrective action
(a)
balancing is
change the
or is displayed on the
4
260] for more
Corrective action
(a)
2
EPRA14~18D + ETVH16SU18+23E
Daikin Altherma 3 H HT F
4P644738-1D – 2023.10
not
pump