16 Configuration
Installation and operation manual
30
RK RKXYQ8T7Y1B
VRV IV compressor unit for indoor installation
4P499900-1B – 2021.12
Model
Display
5 HP
7‑LEDs display:
▪ H1P: Shows the mode
▪ H2P~H7P: Shows the settings and values,
represented in binary code
(H8P: NOT used for field settings, but used during
initialisation)
8 HP
7‑segments display (
)
Example:
H1P H2P H3P H4P H5P H6P H7P
-
+
+
+
+
+
[
H1P
32 16
8
4
2
1]
Description
(H1P OFF)
Default situation
(H1P flashing)
Mode 1
(H1P ON)
Mode 2
+
+
+
+
+
0
0
8
0
0
0
(H2P~H7P = binary 8)
Setting 8
(in mode 2)
+
+
+
+
+
0
0
0
4
0
0
(H2P~H7P = binary 4)
Value 4
(in mode 2)
16.1.4
To access mode 1 or 2
After the units are turned ON, the display goes to its default
situation. From there, you can access mode 1 and mode 2.
Initialisation: default situation
NOTICE
Be sure to turn ON the power 6 hours before operation in
order to have power running to the crankcase heater and
to protect the compressor.
Turn on the power supply of the compressor unit, heat exchanger
unit, and all indoor units. When the communication between the
compressor unit, heat exchanger unit, and indoor units is established
and normal, the display indication state will be as below (default
situation when shipped from factory).
1~2 min
8~10 min
10~12 min
5 HP
8 HP
b
c
b
a
a
a
Power ON
b
Default situation
c
LED indication when there is a malfunction
If the default situation is not displayed after 10~12 minutes, check
the malfunction code on the indoor unit user interface (and in case of
8 HP on the compressor unit 7‑segment display). Solve the
malfunction code accordingly. First, check the communication wiring.
Switching between modes
Use BS1 to switch between the default situation, mode 1 and
mode 2.
BS1 [5 s]
BS1
BS1
BS1
a
c
b
BS1 [5 s]
BS1
BS1
BS1
a
b
c
5 HP
8 HP
a
Default situation (H1P OFF)
b
Mode 1 (H1P flashing)
c
Mode 2 (H1P ON)
BS1
Press BS1.
BS1 [5 s]
Press BS1 for at least 5 s.
INFORMATION
If you get confused in the middle of the process, press BS1
to return to the default situation.
16.1.5
To use mode 1 (and default situation)
In mode 1 (and in default situation) you can read out some
information. How to do this differs depending on the model.
Example: 7‑LEDs display – Default situation
(in case of 5 HP)
You can read out the status of low noise operation as follows:
#
Action
Button/display
1
Make sure the LEDs are
showing the default situation.
(H1P OFF)
2
Check the status of LED
H6P.
H6P OFF: Unit is currently
not operating under low noise
restrictions.
H6P ON: Unit is currently
operating under low noise
restrictions.
Example: 7‑LEDs display – Mode 1
(in case of 5 HP)
You can read out setting [1‑5] (= the total number of connected units
(heat exchanger unit + indoor units)) as follows:
#
Action
Button/display
1
Start from the default
situation.
2
Select mode 1.
BS1 [1×]
3
Select setting 5.
("X×" depends on the setting
that you want to select.)
BS2 [X×]
(= binary 5)
4
Display the value of setting 5.
(there are 8 units connected)
BS3 [1×]
(= binary 8)
