Before Operation; Maintenance And Service; Precautions For Maintenance And Service; Periodic Check Of The Ventilated Enclosure - Daikin VRV 5 BS4A14AJV1B Installation And Operation Manual

a Heat recovery outdoor unit
b Branch selector (BS)
c Refrigerant piping
d VRV direct expansion (DX) indoor unit
e Remote controller in normal mode
f Remote controller in alarm only mode
g Remote controller in supervisor mode (mandatory in
some situations)
h iTM (optional)
i Option PCB (optional)
5

Before operation

WARNING
This unit contains electrical and hot parts.
WARNING
Before operating the unit, be sure the installation has been
carried out correctly by an installer.
WARNING
The unit is equipped with a refrigerant leak detection
system for safety.
To be effective, the unit MUST be electrically powered at
all times after installation, except for maintenance.
NOTICE
NEVER inspect or service the unit by yourself. Ask a
qualified service person to perform this work.
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.
This operation manual is for the following systems with standard
control. Before initiating operation, contact your dealer for the
operation that corresponds to your system type and mark. If your
installation has a customised control system, ask your dealer for the
operation that corresponds to your system.
6

Maintenance and service

WARNING
The unit is equipped with a refrigerant leak detection
system for safety.
To be effective, the unit MUST be electrically powered at
all times after installation, except for maintenance.
WARNING
NEVER replace a fuse with a fuse of a wrong ampere
ratings or other wires when a fuse blows out. Use of wire
or copper wire may cause the unit to break down or cause
a fire.
CAUTION
After a long use, check the unit stand and fitting for
damage. If damaged, the unit may fall and result in injury.
NOTICE
NEVER inspect or service the unit by yourself. Ask a
qualified service person to perform this work.
BS4~12A14AJV1B
VRV 5 branch selector unit
4P670163-1 – 2022.02
6.1 Precautions for maintenance and
service
CAUTION
instructions" [ 4 8] to acknowledge all
See "3 User safety
related safety instructions.
NOTICE
Maintenance MUST be done by an authorised installer or
service agent.
We recommend performing maintenance at least once a
year. However, applicable legislation might require shorter
maintenance intervals.
NOTICE
NEVER inspect or service the unit by yourself. Ask a
qualified service person to perform this work.
Following symbols may occur on the indoor unit:
Symbol Explanation
Measure the voltage at the terminals of main circuit
capacitors or electrical components before servicing.
6.2 Periodic check of the ventilated
enclosure
In case a ventilated enclosure is used as a safety measure for the
BS unit, it is required to periodically check the airflow rate to confirm
that it is still meeting the legal requirements.
To check the extraction airflow rate, contact your installer to follow
the steps as described in "17.1.5 To perform a BS unit test
run" [ 4 40].
6.3

About the refrigerant

6.3.1

About the refrigerant leakage sensor

WARNING
The R32 refrigerant leakage sensor must be replaced after
every detection or at the end of its lifetime. ONLY
authorised persons may replace the sensor.
NOTICE
Functionality of the safety measures are periodically
automatically checked. In case of malfunction, an error
code will be displayed on the user interface.
NOTICE
The R32 refrigerant leakage sensor is a semiconductor
detector which may incorrectly detect substances other
than R32 refrigerant. Avoid using chemical substances
(e.g. organic solvents,
concentrations, in the close proximity of the BS unit
because this may cause misdetection of the R32
refrigerant leakage sensor.
INFORMATION
The sensor has a lifetime of 10 years. The user interface
displays error "CH-22" 6 months before the end of the
sensor lifetime and error "CH-23" after the end of the
sensor lifetime. For more information, see the reference
guide of the user interface and contact your dealer.
5 Before operation
hair spray, paint) in high
Installation and operation manual
11