Daikin Altherma 3 H MT ECH2O, Руководство по установке для специалистов

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14 | Troubleshooting
Installer reference guide
253
EPRA08~W1 + ETSH/X(B)12P30+50EF
Daikin Altherma 3 H MT ECH₂O
4P663478-1 – 2021.07
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
(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
237]) or use the
automatic air purge function (see "To
perform an automatic air
purge"
[
4
238]).
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 valve (if equipped) of the water
circuit towards the expansion vessel is
open.
▪ The pre-pressure setting of the
expansion vessel is correct.