Daikin ETVH16S18EA6V, Installer'S Reference Manual

Page: 240 / 284

14 | Troubleshooting
Installer reference guide
240
EPRA14~W1 + ETVH/9W
Daikin Altherma 3 H HT F
4P644737-1 – 2021.02
Possible cause Corrective action
Various malfunctions. Check if or is displayed on the
home screen of the user interface. See
"14.4.1 To display the help text in case
of a malfunction"
[
4
244] 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.
14.3.5 Symptom: The pump is blocked
Possible causes Corrective action
If the unit has been powered off for a
long time, lime might block the rotor of
the pump. 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.
(a)
Note: Do NOT use excessive force.
2
2
1
3
(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.
14.3.6 Symptom: The pump is making noise (cavitation)
Possible causes Corrective action
There is air in the system Purge air manually (see "To perform a
manual air purge" [
4
221]) or use the
automatic air purge function (see "To
perform an automatic air
purge"
[
4
222]).