Symptom: The Pump Is Blocked - Daikin Altherma 3 H HT ECH2O Service Manual

Possible failure
Cooling/heating operation
starts, but stops
immediately.

3.6.15 Symptom: The pump is blocked

EPRA14~18D + ETSH/X(B)16P30+50E
Daikin Altherma 3 H HT ECH₂O
ESIE22-11A – 2023.06
Root cause category: hardware
Root cause
▪ Refrigerant overcharge,
▪ Mixing of air
refrigerant system.
Possible causes
If the unit has been powered off for a
long time, lime might block the rotor of
the pump.
(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.
Check
Check refrigerant.
in
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.
Note: Do NOT use excessive force.
1
3
3 Troubleshooting
|
Repair
After vacuum drying,
charge correct amount of
refrigerant.
Corrective action
(a)
2
2
Service manual
107