Specifications

Installation and operation manual
38
RXYQQ8~20T7Y1B
VRV IV System Air Conditioner
4P345099-1 – 2013.04
15.2.2. Mode 2
Mode 2 is used to change the field settings of the system. Consulting
the current field setting value and changing the current field setting
value is possible.
In general, normal operation can be resumed without special
intervention after changing field settings.
Some field settings are used for special operation (e.g., 1 time
operation, recovery/vacuuming setting, manual adding refrigerant
setting, etc.). In such a case, it is required to abort the special
operation before normal operation can restart. It will be indicated in
below explanations.
[2-0]= Cool/Heat selection setting
Cool/Heat selection setting is used in case the optional
Cool/Heat selector (KRC19-26A and BRP2A81) is
used. Depending on the outdoor unit setup (single
outdoor unit setup or multi outdoor unit setup), the
correct setting should be chosen. More details on how
to use the Cool/Heat selector option can be found in the
manual of the Cool/Heat selector.
Default value=0.
 0=Each individual outdoor unit can select
Cool/Heat operation (by Cool/Heat selector if
installed), or by defining master indoor user
interface (see "6.4. Setting the master user
interface" on page 55).
 1=Master unit decides Cool/Heat operation when
outdoor units are connected in multiple system
combination
(a)
 2=Slave unit for Cool/Heat operation when outdoor
units are connected in multiple system
combination
(a)
Change [2-0]=0, 1 or 2 in function of required
functionality.
[2-8]= T
e
target temperature during cooling operation
Default value=0
Change [2-8]=0, 2~7 in function of required operation
method during cooling.
For more information and advice about the impact of
these settings, see "15.3. Energy saving and optimum
operation" on page 40.
[2-9]= T
c
target temperature during heating operation
Default value=0
Value
[2-8]
T
e
target
0 Auto (default)
26
37
48
59
610
711
Value
[2-9]
T
c
target
0 Auto (default)
141
343
646
Change [2-9]=0, 1, 3 or 6 in function of required
operation method during heating.
For more information and advice about the impact of
these settings, see "15.3. Energy saving and optimum
operation" on page 40.
[2-12]= Enable the low noise function and/or power
consumption limitation via external control adaptor
(DTA104A61/62)
If the system needs to be running under low noise
operation or under power consumption limitation
conditions when an external signal is sent to the unit,
this setting should be changed. This setting will only be
effective when the optional external control adaptor
(DTA104A61/62) is installed.
Default value=0.
To activate this function change [2-12]=1.
[2-18]= Fan high static pressure setting
In order to increase the static pressure the outdoor unit
fan is delivering, this setting should be activated. For
details about this setting, see technical specifications.
Default value=0.
To activate this function change [2-18]=1.
[2-20]= Manual additional refrigerant charge
In order to add the additional refrigerant charge amount
in a manual way (without automatic refrigerant charging
functionality), following setting should be applied.
Further instructions regarding the different ways to
charge additional refrigerant into your system can be
found in chapter "14.4. Method for adding refrigerant"
on page 32.
Default value=0.
To activate this function change [2-20]=1.
To stop the manual additional refrigerant charge
operation (when the required additional refrigerant
amount is charged), push BS3. If this function was not
aborted by pushing BS3, the unit will stop its operation
after 30 minutes. If 30 minutes was not sufficient to add
the needed refrigerant amount, the function can be
reactivated by changing the field setting again.
[2-21]= Refrigerant recovery/vacuuming mode
In order to achieve a free pathway to reclaim refrigerant
out of the system or to remove residual substances or to
vacuum the system it is necessary to apply a setting
which will open required valves in the refrigerant circuit
so the reclaim of refrigerant or vacuuming process can
be done properly.
Default value=0.
To activate function change [2-21]=1.
To stop the refrigerant recovery/vacuuming mode, push
BS3. If BS3 is not pushed, the system will remain in
refrigerant recovery/vacuuming mode.
[2-22]= Automatic low noise setting and level during night time
By changing this setting, you activate the automatic low
noise operation function of the unit and define the level
of operation. Depending on the chosen level, the noise
level will be lowered (3: Level 3<2: Level2<1: Level1).
The start and stop moments for this function are defined
under setting [2-26] and [2-27].
Default value=0.
To activate function change [2-22]=1, 2 or 3.