13
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Troubleshooting
Installer reference guide
217
EPRA14~W1 + ETVH/9W(G)
Daikin Altherma 3 H HT F
4P587502-1 – 2019.07
WARNING
Prevent hazards due to inadvertent resetting of the thermal cut-out: power to this
appliance MUST NOT be supplied through an external switching device, such as a
timer, or connected to a circuit that is regularly turned ON and OFF by the utility.
DANGER: RISK OF BURNING
13.3 Solving problems based on symptoms
13.3.1 Symptom: The unit is NOT heating or cooling as expected
Possible causes
Corrective action
The temperature setting is NOT correct Check the temperature setting on the
remote controller. Refer to the
operation manual.
The water flow is too low
Check and make sure that:
▪
All shut-off valves of the water circuit
are completely open.
▪
The water filter is clean. Clean if
necessary.
▪
There is no air in the system. Purge air
if necessary. You can purge air
manually (see
200]) or use the
automatic air purge function (see
201]).
▪
The water pressure is >1 bar.
▪
The expansion vessel is NOT broken.
▪
The valve (if equipped) of the water
circuit towards the expansion vessel is
open.
▪
The resistance in the water circuit is
NOT too high for the pump (see the
ESP curve in the "Technical data"
chapter).
If the problem persists after you have
conducted all of the above checks,
contact your dealer. In some cases, it is
normal that the unit decides to use a
low water flow.
The water volume in the installation is
too low
Make sure that the water volume in the
installation is above the minimum
required value (see
