General Symptoms - Rotex RKHBRD011AAV1 Guia De Instalacion

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.
Switch off all power supply – also outdoor unit power
supply, etc., ... – before removing the switch box
service 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.
2x
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.
Installation manual
32
5x
C C
A
C
A
A
B
5x
A
B

General symptoms

Symptom 1: The unit is turned on (y LED is lit) but the unit is not
heating as expected
P
OSSIBLE CAUSES
The temperature setting is not
correct.
The water flow is too low.
The water volume in the installation
is too low.
Capacity shortage
Symptom 2: Pump is making noise (cavitation)
P
OSSIBLE CAUSES
There is air in the system.
Water pressure at pump inlet is too
low.
Symptom 3: The water pressure relief valve opens
P
OSSIBLE CAUSES
The expansion vessel is broken.
The water volume in the installation
is too high.
Symptom 4: The water pressure relief valve leaks
P
OSSIBLE CAUSES
Dirt is blocking the water pressure
relief valve outlet.
Symptom 5: The user interface displays "n
certain buttons
P
OSSIBLE CAUSES
The current permission level is set to
a level that prevents using the
pressed button.
Indoor unit for air to water heat pump system
C
ORRECTIVE ACTION
Check the controller set point.
• 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.
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).
Check if the cooling fans at the rear
of the switch box are working
properly.
C
ORRECTIVE ACTION
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).
• 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).
C
ORRECTIVE ACTION
Replace the expansion vessel.
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).
C
ORRECTIVE ACTION
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.
n " when pressing n
n
C
ORRECTIVE ACTION
Change the "user permission level"
field setting ([0-00], see "Field
settings" in the operation manual.
RKHBRD011~016AAV1+Y1
4PW55786-1