Daikin Altherma 3 R W - Symptom: the Pump Is Blocked; Symptom: the Pump Is Making Noise (Cavitation)

15 | Troubleshooting
Installer reference guide
273
ERLA11~16D + EBBH/X11+16D
Daikin Altherma 3 R W
4P643603-1B – 2022.05
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.
Depending on the pump type, do one of
the following:
▪ Use a Philips No. 2 screwdriver to
push the deblocking screw of the
rotor in (0.5 cm). Then turn the
deblocking screw back and forth until
the rotor is deblocked.
(a)
Note: Do NOT use excessive force.
2
2
1
▪ 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255]) or use the
automatic air purge function (see "To
perform an automatic air
purge"[4255]).