Daikin EKHBRD-AY1, Руководство по установке

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EKHBRD011~Y1
Indoor unit for air to water heat pump system
4PW54465-1C
Installation manual
34
■
To gain access to the indoor unit at the front side, the total switch
box can be removed from the unit.
1 Remove the switch box cover by
loosening the front screws and
then unhitch the cover.
2 Disconnect all field wiring.
3 Put back the switch box cover
and fix it with the appropriate
screws.
4 Loosen the front screws and unhitch the total switch box.
The switch box can now be placed just before the indoor unit.
The compressor cable located at the backside of the unit can be
untied to place the switch box further away from the unit.
General symptoms
Symptom 1: The unit is turned on ( y 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
Switch off all power supply – also outdoor unit power
supply, etc., ... – before removing the switch box
service cover.
■
Make sure to always fix the cover with the screws
when removing the switch box.
■
Parts inside the unit can be hot and burning is
possible.
■
Make sure to switch off all power supplies before
removing the switch box from the unit.
5x
A
A
A
C C
C
B
5x
2x
MAX
15cm
A
B
P
OSSIBLE CAUSES
C
ORRECTIVE ACTION
The temperature setting is not
correct. Check the controller set point.
The water flow is too low. • Check that all shut-off valves of
the water circuit are completely
open.
• Check if the water filter needs
cleaning.
• Make sure there is no air in the
system (purge air).
• Check on the manometer that
there is sufficient 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 11
).
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).
P
OSSIBLE CAUSES
C
ORRECTIVE ACTION
There is air in the system. Purge air.
Water pressure at pump inlet is too
low. • Check on the manometer that
there is sufficient 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 12
).
P
OSSIBLE CAUSES
C
ORRECTIVE 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 11
).
P
OSSIBLE CAUSES
C
ORRECTIVE 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 first and then contact your
local dealer.