Solving Problems Based On Symptoms; Symptom: The Unit Is Not Heating Or Cooling As Expected; Symptom: The Compressor Does Not Start (Space Heating Or Domestic Water Heating); Symptom: The Pump Is Making Noise (Cavitation) - Daikin Altherma EDLQ011-016CW1 Installer's Reference Manual

WARNING
Prevent hazards due to inadvertent resetting of the thermal
cut-out: 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
12.3 Solving problems based on
symptoms
12.3.1 Symptom: The unit is NOT heating or
cooling as expected
Possible causes
The temperature setting is NOT
correct
The water flow is too low
The water volume in the
installation is too low
EBLQ+EDLQ011~016CAV3+W1 + EK(2)CB07CAV3 +
EKMBUHCA3V3+9W1
Daikin Altherma low temperature monobloc
4P522034-1 – 2018.01
Corrective action
Check the temperature setting on
the 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 air
purge" on page 78) or use the
automatic air purge function
(see "To perform an automatic
air purge" on page 78).
▪ 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 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
"6.3.3 To check the water volume
and flow rate" on page 27).
12.3.2 Symptom: The compressor does NOT
start (space heating or domestic water
heating)
Possible causes
The unit must start up out of its
operation range (the water
temperature is too low)
The preferential kWh rate power
supply settings and electrical
connections do NOT match
The preferential kWh rate signal
was sent by the electricity
company
12.3.3 Symptom: The pump is making noise
(cavitation)
Possible causes
There is air in the system
The water pressure at the pump
inlet is too low
12 Troubleshooting
Corrective action
If the system contains a
backup heater:
If the water temperature is too
low, the unit uses the backup
heater to reach the minimum
water temperature first (15°C).
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 system does NOT
contain a backup heater:
It may be required to start up with
a small water volume. To do this,
gradually open the heat emitters.
As a result, the water
temperature will gradually rise.
Monitor the inlet water
temperature ([6.1.6] in the menu
structure) and make sure it does
NOT drop below 25°C.
If the problem persists after you
have conducted all of the above
checks, contact your dealer.
This should match with the
connections as explained in
"6.4 Preparing electrical
wiring" on page 29 and "7.8.5 To
connect the main power
supply" on page 41.
Wait for the power to return (2
hours max.).
Corrective action
Purge air manually (see "To
perform a manual air purge" on
page 78) or use the automatic air
purge function (see "To perform
an automatic air purge" on
page 78).
Check and make sure that:
▪ The water pressure is >1 bar.
▪ The manometer is not broken.
▪ The expansion vessel is NOT
broken.
▪ The pre-pressure setting of the
expansion vessel is correct
(see "6.3.4 Changing the pre-
pressure of the expansion
vessel" on page 29).
Installer reference guide
83