Daikin Altherma 3 H HT ECH2O Service Manual page 379

To check if the field installed air purge valves are installed on the correct locations
To check for an external heat source
To check if a by-pass is installed in the water circuit
EPRA14~18D + ETSH/X(B)16P30+50E
Daikin Altherma 3 H HT ECH₂O
ESIE22-11A – 2023.06
All valves are open?
Yes
No
1 Check the installation outside the unit. All highest points of the installation
MUST have air purge valves installed. The air purge valves MUST NOT be
installed on other locations.
All air purge valves are installed on the
correct locations?
Yes
No
1 Inspect the installation outside the unit and check for the presence of an
external heat source. This may have an impact on the water temperature
inside the unit.
An external heat source was found in
the installation?
Yes
No
1 A by‑pass MUST be installed in the water circuit outside the unit. This is
needed to make sure that water can still flow through the circuit even when
all loops (underfloor heating, radiators, ...) are shut‑off (e.g. for anti‑freeze
function).
e
d
a By‑pass
b Underfloor heating (cooling) circuit
c Radiators circuit
d Indoor or outdoor unit
5 Third party components
|
Action
Return to the troubleshooting of the
specific error and continue with the
next procedure.
Open the specific valve(s) of the water
circuit, see "5.3.2 Repair
4
procedures" [ 381].
Action
Return to the troubleshooting of the
specific error and continue with the
next procedure.
Install the specific air purge valve(s) on
the correct location(s) in the water
circuit, see "5.3.2 Repair
4
procedures" [ 381].
Action
Remove the external heat source from
the installation, see
4
procedures" [ 381].
Return to the troubleshooting of the
specific error and continue with the
next procedure.
a
b c
"5.3.2 Repair
Service manual
379