To Connect The Pc Configurator To The Compressor Unit; Commissioning; Precautions When Commissioning; Checklist Before Commissioning - Daikin VRV IV RKXYQ5T8Y1B Series Installation And Operation Manual

17 Commissioning

Setting
[2‑82] (in case of 8 HP)
(= binary [2‑42]) (in case of
5 HP)
Heating comfort setting.
This setting is used in conjunction with setting [2‑9].
16.1.9 To connect the PC configurator to the
compressor unit
5 HP
a b
X41A
2
3
A1P
a PC
b Cable (EKPCCAB*)
X27A Connector
X41A Connector
A1P Compressor unit main PCB
17 Commissioning
After installation and once the field settings are defined, the installer
is obliged to verify correct operation. Therefore a test run MUST be
performed according to the procedures described below.
17.1

Precautions when commissioning

CAUTION
Do not perform the test operation while working on the
indoor units or the heat exchanger unit.
When performing the test operation, not only the
compressor unit will operate, but the heat exchanger unit
and the connected indoor units as well. Working on an
indoor unit or the heat exchanger unit while performing a
test operation is dangerous.
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.
During test operation, the compressor unit, the heat exchanger unit
and the indoor units will start up. Make sure that the preparations of
the heat exchanger unit and all the indoor units are finished (field
piping, electrical wiring, air purge, ...). See installation manual of the
indoor units for details.
Installation and operation manual
36
(8 HP)
0
1 (default)
2
3
8 HP
a b
X27A
4
5
A1P
Value
(5 HP)
(default)
17.2

Checklist before commissioning

After the installation of the unit, first check the items listed below.
Once all checks are fulfilled, the unit must be closed. Power-up the
unit after it is closed.
You read the complete installation and operation
instructions, as described in the installer and user
reference guide.
Installation
Check that the unit is properly installed, to avoid abnormal
noises and vibrations when starting up the unit.
Field wiring
Be sure that the field wiring has been carried out
according to the instructions described in the chapter
Connecting the electrical wiring, according to the wiring
diagrams and according to the applicable legislation.
Power supply voltage
Check the power supply voltage on the local supply panel.
The voltage MUST correspond to the voltage on the
nameplate of the unit.
Earth wiring
Be sure that the earth wires have been connected
properly and that the earth terminals are tightened.
Insulation test of the main power circuit
Using a megatester for 500 V, check that the insulation
resistance of 2 MΩ or more is attained by applying a
voltage of 500 V DC between power terminals and earth.
NEVER use the megatester for the transmission wiring.
Fuses, circuit breakers, or protection devices
Check that the fuses, circuit breakers, or the locally
installed protection devices are of the size and type
specified in the
requirements" [ 4 27]. Be sure that neither a fuse nor a
protection device has been bypassed.
Internal wiring
Visually check the electrical component box and the
inside of the unit for loose connections or damaged
electrical components.
Pipe size and pipe insulation
Be sure that correct pipe sizes are installed and that the
insulation work is properly executed.
Stop valves
Be sure that the stop valves are open on both liquid and
gas side.
Damaged equipment
Check the inside of the unit for damaged components or
squeezed pipes.
VRV IV compressor unit for indoor installation
Description
Eco
Mild
Quick
Powerful
chapter "15.2 Safety device
RKXYQ5T8 + RKXYQ8T7Y1B
4P499900-1A – 2020.10