Solving Problems Based On Symptoms; Symptom: The Unit Is Not Heating Or Cooling As Expected; Symptom: Hot Water Does Not Reach The Desired Temperature - Daikin EWYA004D2V3P Installer's Reference Manual

15.3 Solving problems based on symptoms

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

15.3.2 Symptom: Hot water does NOT reach the desired temperature

EWAA004~008D + EWYA004~008D
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P688013-1B – 2022.09
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.
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
Possible causes
One of the tank temperature sensors is
broken.
15 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" [ 189]) or use the
automatic air purge function (see
perform an automatic
4
purge" [ 189]).
▪ The water pressure is >1 bar.
▪ The expansion vessel is NOT broken.
▪ The resistance in the water circuit is
NOT too high for the pump (see the
ESP curve).
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
Corrective action
See the service manual of the unit for
the corresponding corrective action.
"To
air
4
rate" [ 61]).
Installer reference guide
199