Daikin Altherma 3 M - Symptom: the Pump Is Blocked

2 | Troubleshooting
Service manual
85
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
Root cause category: hardware
Possible failure Root cause Check Repair
Cooling/heating operation
starts, but stops
immediately.
▪ Refrigerant overcharge,
▪ Mixing of air in
refrigerant system.
Check refrigerant. After vacuum drying,
charge correct amount of
refrigerant.
2.4.15 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.