16 Configuration
Installation and operation manual
35
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546220-1C – 2020.10
a
b
BS1 BS2
DS1 DS2
BS3
X27A
BS1
MODE: For changing the set mode
BS2
SET: For field setting
BS3
RETURN: For field setting
DS1, DS2
DIP switches
a
7‑segment displays
b
Push buttons
16.1.3
To access the field setting components
It is not required to open the complete electronic component box to
access the push buttons on the PCB and read out the 7‑segment
display(s).
To access you can remove the front inspection cover of the front
plate (see figure). Now you can open the inspection cover of the
electrical component box front plate (see figure). You can see the
three push buttons and the three 7‑segment displays and DIP
switches.
2×
a
b
c
a
Front plate
b
Main PCB with 3 7‑segment displays and 3 push buttons
c
Electrical component box service cover
Operate the switches and push buttons with an insulated stick (such
as a closed ball-point pen) to avoid touching of live parts.
Make sure to re-attach the inspection cover into the electronic
component box cover and to close the front plate's inspection cover
after the job is finished. During operation of the unit the front plate of
the unit should be attached. Settings are still possible to be made
through the inspection opening.
NOTICE
Make sure that all outside panels, except for the service
cover on the electrical component box, are closed while
working.
Close the lid of the electrical component box firmly before
turning on the power.
16.1.4
To access mode 1 or 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 outdoor unit and all indoor units.
When the communication between indoor units and outdoor unit(s) is
established and normal, the 7‑segment display indication state will
be as below (default situation when shipped from factory).
Stage
Display
When turning on the power supply: flashing as
indicated. First checks on power supply are
executed (1~2 min).
When no trouble occurs: lighted as indicated
(8~10 min).
Ready for operation: blank display indication as
indicated.
7‑segment display indications:
Off
Blinking
On
In case of malfunction, the malfunction code is displayed on the
indoor unit user interface and the outdoor unit 7‑segment display.
Solve the malfunction code accordingly. The communication wiring
should be checked at first.
Access
BS1 is used to switch between the default situation, mode 1 and
mode 2.
Access
Action
Default situation
Mode 1
Push BS1 one time.
7‑segment display indication changes to:
.
Push BS1 one more time to return to the
default situation.
Mode 2
Push BS1 for at least 5 seconds.
7‑segment display indication changes to:
Push BS1 one more time (shortly) to return to
the default situation.
INFORMATION
If you get confused in the middle of the process, push BS1
to return to the default situation (no indication on
7‑segment displays: blank, refer to
16.1.5
To use mode 1
Mode 1 is used to set basic settings and to monitor the status of the
unit.
What
How
Changing and accessing
the setting in mode 1
Once mode 1 is selected (push BS1
one time), you can select the wanted
setting. It is done by pushing BS2.
Accessing the selected setting's value is
done by pushing BS3 one time.
To quit and return to the
initial status
Press BS1.
16.1.6
To use mode 2
The master unit should be used to input field settings in
mode 2.
Mode 2 is used to set field settings of the outdoor unit and system.
