12 Troubleshooting
Installer reference guide
80
ERGA04~08DAV3(A) + 08S18+23DA +
08S18+23DJ
Daikin Altherma 3 R F
4P495249-1B – 2019.06
Possible causes
Corrective action
The preferential kWh rate signal
was sent by the electricity
company
Wait for the power to return (2
hours max.).
12.3.3
Symptom: The system is making gurgling
noises after commissioning
Possible cause
Corrective action
There is air in the system.
Purge air from the system.
(a)
Various malfunctions.
Check if
or
is displayed
on the home screen of the user
interface. See
the help text in case of a
malfunction" on page 81
for
more information about the
malfunction.
(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:
WARNING
Air purging heat emitters or collectors.
Before you
purge air from heat emitters or collectors, check if
or
is displayed on the home screen of the user interface.
▪ If not, you can purge air immediately.
▪ If yes, make sure that the room where you want to
purge air is sufficiently ventilated.
Reason:
Refrigerant
might leak into the water circuit, and subsequently into
the room when you purge air from the heat emitters or
collectors.
12.3.4
Symptom: The pump is making noise
(cavitation)
Possible causes
Corrective action
There is air in the system
Purge air manually on both
zones (see
) or use the
automatic air purge function on
both zones (see
automatic air purge" on page 73
The water pressure at the pump
inlet is too low
Check and make sure that:
▪ The water pressure is >1 bar.
▪ The water pressure sensor is
not broken.
▪ The expansion vessel is NOT
broken.
▪ The valve (if equipped) of the
water
circuit
towards
the
expansion vessel is open.
▪ The pre-pressure setting of the
expansion vessel is correct
(see
pressure of the expansion
vessel" on page 23
12.3.5
Symptom: The pressure relief valve opens
Possible causes
Corrective action
The expansion vessel is broken
Replace the expansion vessel.
The valve (if equipped) of the
water circuit towards the
expansion vessel is closed.
Open the valve.
Possible causes
Corrective action
The water volume in the
installation is too high
Make sure that the water volume
in the installation is below the
maximum allowed value (see
"6.4.3 To check the water volume
and flow rate" on page 22
and
"6.4.4 Changing the pre-pressure
of the expansion vessel" on
page 23
).
The water circuit head is too high The water circuit head is the
difference in height between the
indoor unit and the highest point
of the water circuit. If the indoor
unit is located at the highest
point of the installation, the
installation height is considered
0 m. The maximum water circuit
head is 10 m.
Check the installation
requirements.
12.3.6
Symptom: The water pressure relief valve
leaks
Possible causes
Corrective action
Dirt is blocking the water
pressure relief valve outlet
Check whether the pressure
relief valve works correctly by
turning the red knob on the valve
counterclockwise:
▪ If you do NOT hear a clacking
sound, contact your dealer.
▪ If the water keeps running out
of the unit, close both the
water inlet and outlet shut-off
valves first and then contact
your dealer.
12.3.7
Symptom: The space is NOT sufficiently
heated at low outdoor temperatures
Possible causes
Corrective action
The backup heater operation is
not activated
Check the following:
▪ The backup heater operation
mode is enabled. Go to:
▪ [9.3.8]:
Installer
settings
>
Backup heater
>
Operation
[4‑00]
▪ The backup heater overcurrent
circuit breaker is on. If not, turn
it back on.
▪ The thermal protector of the
backup
heater
is
NOT
activated. If it has, check the
following, and then press the
reset button in the switch box:
▪ The water pressure
▪ Whether there is air in the
system
▪ The air purge operation
