Daikin Altherma 3 R F, Installer'S Reference Manual

Page: 266 / 312

15 | Troubleshooting
Installer reference guide
266
ERLA11~W1 + EBVH16SU23DJ
Daikin Altherma 3 R F
4P655196-1 – 2021.09
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.
15.3.5 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.
15.3.6 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
247]) or use the
automatic air purge function (see "To
perform an automatic air
purge"
[
4
247]).
The water pressure at the pump inlet is
too low Check and make sure that:
▪ The water pressure is >1 bar.
▪ The water pressure sensor is NOT
broken.
▪ The expansion vessel is NOT broken.
▪ The pre-pressure setting of the
expansion vessel is correct (see
"8.5.4 Changing the pre-pressure of
the expansion vessel"
[
4
110]).