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15
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Troubleshooting
15.3.6 Symptom: The pump is making noise (cavitation)
15.3.7 Symptom: The pressure relief valve opens
15.3.8 Symptom: The water pressure relief valve leaks
Installer reference guide
240
Possible causes
There is air in the system
The water pressure at the pump inlet is
too low
Possible causes
The expansion vessel is broken
The water volume in the installation is
too high
The water circuit head is too high
Possible causes
Dirt is blocking the water pressure relief
valve outlet
Corrective action
Purge air manually (see
4
manual air
purge" [
226]) or use the
automatic air purge function (see
perform an automatic air
4
purge" [
227]).
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 pre-pressure setting of the
expansion vessel is correct (see
"8.1.4 Changing the pre-pressure of
the expansion
vessel" [
Corrective action
Replace the expansion vessel.
Make sure that the water volume in the
installation is below the maximum
allowed value (see
"8.1.3 To check the
water volume and flow
"8.1.4 Changing the pre-pressure of the
4
expansion
vessel" [
79]).
The water circuit head is the difference
in height between the outdoor unit and
the highest point of the water circuit. If
the outdoor unit is located at the
highest point of the installation, the
installation height is considered 0 m.
The maximum water circuit head is 5 m.
Check the installation requirements.
Corrective action
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.
"To perform a
"To
4
79]).
4
rate" [
76] and
EBLA09~16D + EDLA09~16D
Daikin Altherma 3 M
4P620241-1B – 2022.05
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