15 Finishing the indoor unit installation
Installation and operation manual
21
FXAA15~63AUV1B
VRV system air conditioner
3P622285-1B – 2020.10
15
Finishing the indoor unit
installation
15.1
To fix the unit on the mounting
plate
1
Remove the piece of packing material.
2
Press the bottom frame of the unit with both hands to set it on
the bottom hooks of the mounting plate. Make sure that the
wires do NOT get squeezed or caught anywhere.
3
Press the bottom edge of the indoor unit with both hands until it
is firmly caught by the mounting plate hooks.
4
Secure the indoor unit to the mounting plate using 2 indoor unit
fixing screws M4×12L (accessory).
a
b
e
c
d
a
Mounting plate (accessory)
b
Refrigerant piping
c
Insulation tape
d
Bottom frame
e
Screw M4×12L (2 pieces from accessory)
5
Re-install the front grille (
"12.2.4 To re-install the front
6
Re-install the front panel (
"12.2.2 To re-install the front
16
Commissioning
NOTICE
ALWAYS operate the unit with thermistors and/or pressure
sensors/switches. If NOT, burning of the compressor might
be the result.
16.1
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
.
The
indoor unit
is properly mounted.
The
outdoor unit
is properly mounted.
Make sure
drain piping
is properly installed, insulated
and drainage flows smoothly. Check for water leaks.
Possible consequence:
Condensate water might drip.
The
refrigerant pipes
(gas and liquid) are installed
correctly and thermally insulated.
There are NO
refrigerant leaks
.
There are NO
missing phases
or
reversed phases
.
The system is properly
earthed
and the earth terminals
are tightened.
The
fuses
or locally installed protection devices are
installed according to this document, and have NOT been
bypassed.
The
power supply voltage
matches the voltage on the
identification label of the unit.
There are NO
loose connections
or damaged electrical
components in the switch box.
There are NO
damaged components
or
squeezed
pipes
on the inside of the indoor and outdoor units.
The
stop valves
(gas and liquid) on the outdoor unit are
fully open.
16.2
To perform a test run
INFORMATION
▪ Perform the test run according to the instructions in the
outdoor unit manual.
▪ The test run is only completed if there is no malfunction
code displayed on the user interface or the outdoor unit
7‑segment display.
▪ See the service manual for the complete list of error
codes and a detailed troubleshooting guideline for each
error.
NOTICE
Do NOT interrupt the test run.
17
Configuration
17.1
Field setting
Make the following field settings so that they correspond with the
actual installation setup and with the needs of the user:
▪ Airflow rate increase mode
▪ Air volume when thermostat control is OFF
▪ Time to clean air filter
▪ Thermostat sensor selection
▪ Thermostat differential changeover (if remote sensor is used)
▪ Differential for automatic changeover
▪ Auto-restart after power failure
INFORMATION
▪ The connection of optional accessories to the indoor
unit might cause changes to some field settings. For
more information, see the installation manual of the
optional accessory.
▪ Following setting are only applicable when using the
BRC1H52* user interface. When using any other user
interface, see the installation manual or service manual
of the user interface.
Setting: Airflow rate increase mode
This setting must correspond with the needs of the user. It is
possible to raise set airflow (HIGH and LOW) from the field. Change
the value number (—) as shown in the table below.
