Solving Problems Based On Symptoms; Symptom: The Unit Is Not Heating Or Cooling As Expected - Daikin Altherma 3 H MT W Installer's Reference Manual

14.3 Solving problems based on symptoms

14.3.1 Symptom: The unit is NOT heating or cooling as expected

EPRA08~12EAV3+W1 + ETBH/X12EF6V+9W
Daikin Altherma 3 H MT W
4P634885-1 – 2021.03
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/SCALDING
Possible causes
The temperature setting is NOT correct Check the temperature setting on the
The water flow is too low
The water volume in the installation is
too low
14 Troubleshooting
|
Corrective action
remote controller. Refer to the
operation manual.
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 "To perform a manual
4
air purge" [ 231]) or use the
automatic air purge function (see
perform an automatic
4
purge" [ 232]).
▪ 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.
Make sure that the water volume in the
installation is above the minimum
required value (see "8.1.3 To check the
water volume and flow
"To
air
4
rate" [ 86]).
Installer reference guide
247