13
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Troubleshooting
Installer reference guide
219
EPRA14~W1 + ETVH/9W(G)
Daikin Altherma 3 H HT F
4P587502-1 – 2019.07
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.
13.3.5 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.
13.3.6 Symptom: The pump is making noise (cavitation)
Possible causes
Corrective action
There is air in the system
Purge air manually (see
200]) or use the
automatic air purge function (see
