Daikin EKHVMYD50ABV1 [58/64] Draining the system

Daikin EKHVMYD50ABV1 [58/64] Draining the system
Installation manual
56
EKHVMRD50+80ABV1 + EKHVMYD50+80ABV1
Daikin Altherma indoor unit
4P404420-1 2015.04
12.3. Draining the system
For EKHVMRD
If draining is needed, connect the drain hose (2) to the drain valve (1)
as described in the gure below and open the drain valve (1).
For EKHVMYD
For draining of the system, connect the drain hose (3) to the drain
pan (2) as described in the gure below. Open the drain taps (1) and
let the water ow into the drain pan (2).
12.4. General symptoms
Symptom 1: The unit is turned on ( LED is lit) but the unit is not
heating as expected
Symptom 2: Pump is making noise (cavitation)
Symptom 3: The water pressure relief valve opens
Symptom 4: The water pressure relief valve leaks
Symptom 5: The user interface displays " " when pressing
certain buttons
2
1
1
1
3
2
POSSIBLE CAUSES CORRECTIVE ACTION
The temperature setting is not
correct.
Check the controller set point.
The water ow is too low. Check that all shut-off valves of
the water circuit are completely
open.
Check if the water lter needs
cleaning.
Make sure there is no air in the
system (purge air).
Check on the manometer that
there is sufcient water pressure.
The water pressure must be
>0.3 bar (water is cold), >>0.3 bar
(water is hot).
Make sure that the expansion
vessel is not broken.
The water volume in the installation
is too low.
Make sure that the water volume in
the installation is above the minimum
required value (refer to "Checking
the water volume and expansion
vessel pre-pressure" on page 25).
Capacity shortage Check if the cooling fan at the rear
of the switch box is working
properly.
Check if the unit is not installed in
a too hot location (>30°C).
POSSIBLE CAUSES CORRECTIVE ACTION
There is air in the system. Purge air.
Water pressure at pump inlet is too
low.
Check on the manometer that
there is sufcient water pressure.
The water pressure must be
>0.3 bar (water is cold), >>0.3 bar
(water is hot).
Check that the manometer is not
broken.
Check that the expansion vessel is
not broken.
Check that the setting of the
pre-pressure of the expansion
vessel is correct (refer to "Setting
the pre-pressure of the expansion
vessel" on page 26).
POSSIBLE CAUSES CORRECTIVE ACTION
The expansion vessel is broken. Replace the expansion vessel.
The water volume in the installation
is too high.
Make sure that the water volume in
the installation is under the
maximum allowed value (refer to
"Checking the water volume and
expansion vessel pre-pressure" on
page 25).
POSSIBLE CAUSES CORRECTIVE ACTION
Dirt is blocking the water pressure
relief valve outlet.
Check for correct operation of the
pressure relief valve by turning the
red knob on the valve counter
clockwise:
If you do not hear a clacking
sound, contact your local dealer.
In case the water keeps running
out of the unit, close both the
water inlet and outlet shut-off
valves rst and then contact your
local dealer.
POSSIBLE CAUSES CORRECTIVE ACTION
The current permission level is set to
a level that prevents using the
pressed button.
Change the "user permission level"
eld setting [0-00], see "Field
settings" in the operation manual.

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