Symptom: The Pump Is Blocked; Symptom: The Pump Is Making Noise (Cavitation) - Daikin EPRA18DAV3 Installer's Reference Manual

13.3.5 Symptom: The pump is blocked

13.3.6 Symptom: The pump is making noise (cavitation)

EPRA14~18DAV3+W1 + ETVH/X16S18+23DA6V+9W(G)
Daikin Altherma 3 H HT F
4P587502-1B – 2020.12
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.
Possible causes
There is air in the system
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
Purge air manually (see
manual air
automatic air purge function (see
perform an automatic air
4
purge" [ 203]).
13 Troubleshooting
|
Corrective action
(a)
2
Corrective action
"To perform a
4
purge" [ 202]) or use the
"To
Installer reference guide
221