Symptom: Hot Water Does Not Reach The Desired Temperature; Symptom: The Compressor Does Not Start (Space Heating Or Domestic Water Heating); Symptom: The System Is Making Gurgling Noises After Commissioning - Daikin EPRA14DAW1 Installer's Reference Manual

13 | Troubleshooting

13.3.2 Symptom: Hot water does NOT reach the desired temperature

13.3.3 Symptom: The compressor does NOT start (space heating or domestic water heating)

13.3.4 Symptom: The system is making gurgling noises after commissioning

Installer reference guide
220
Possible causes
One of the tank temperature sensors is
broken.
Possible causes
The compressor cannot start if the
water temperature is too low. The unit
will use the backup heater to reach the
minimum water temperature (12°C),
after which the compressor can start.
The preferential kWh rate power supply
settings and electrical connections do
NOT match
The preferential kWh rate signal was
sent by the electricity company
Possible cause
There is air in the system.
Various malfunctions.
(a)
We recommend to purge air with the air purge function of the unit (to be performed by
the installer). If you purge air from the heat emitters or collectors, mind the following:
Corrective action
See the service manual of the unit for
the corresponding corrective action.
Corrective action
If the backup heater doesn't start
either, check and make sure that:
▪ The power supply to the backup
heater is correctly wired.
▪ The backup heater thermal protector
is NOT activated.
▪ The backup heater contactors are
NOT broken.
If the problem persists, contact your
dealer.
This should match with the connections
as explained in:
▪ "8.3.1 To connect the main power
4
supply" [ 102]
▪ "8.1.4 About preferential kWh rate
4
power supply" [ 90]
▪ "8.1.5 Overview
connections except
4
actuators" [ 91]
In the user interface of the unit, go to
[8.5.B] Information > Actuators >
Forced off contact.
If Forced off contact is On, the
unit is operating under the preferential
kWh rate. Wait for the power to return
(maximum 2 hours).
Corrective action
Purge air from the system.
Check if or is displayed on the
home screen of the user interface. See
"13.4.1 To display the help text in case
4
of a malfunction" [ 224] for more
information about the malfunction.
EPRA14~18DAV3+W1 + ETVH/X16S18+23DA6V+9W(G)
of electrical
external
(a)
Daikin Altherma 3 H HT F
4P587502-1A – 2020.01