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9. PRECAUTIONS ON
REFRIGERANT LEAKAGE
The application uses R32 refrigerant which is
flammable. So certain essential actions should be taken
in time.
The user/owner or their authorized representative shall
check the alarm device, mechanical ventilation and
refrigerant leakage sensor at least once a year to
ensure they are correctly functioning.
Dilution transfer openings (see clause 1.3.1.4 of the
owner’s manual), for example between rooms, in
occupied spaces shall be checked to confirm there are
no obstructions that block the free passage of air. A
logbook shall be maintained. The results of these
checks shall be recorded in the logbook.
Refrigerant leakage sensor shall be set at a percentage
(25 % maximum) of the LFL of R32.
Under no circumstances shall potential sources of
ignition be used to search for or detect refrigerant leaks.
A halide torch (or any other detector using a naked
flame) shall not be used.
If leak is suspected, keep the area ventilated to avoid
the risk of refrigerant stagnating, and remove/extinguish
all naked flames.
If a leakage of refrigerant is found which requires
brazing, all of the refrigerant shall be recovered from the
system, or isolated (by means of shut off valves) in a
part of the system remote from the leak. Oxygen free
nitrogen (OFN) shall then be purged through the system
both before and during the brazing process.
After the refrigerant leakage maintenance is completed,
eliminate the refrigerant leakage error code by romote
controller.
Figure 8-2
8.7 Operating This Unit
Once the installation of this unit is completed, and the
test run of the outdoor and indoor units is done, you can
start to run the system.
The indoor unit user interface should be connected to
facilitate the operations of the indoor unit. Please refer to
the installation manual of the indoor unit for more details.
INFORMATION
i
Refer to the installation manual of the indoor unit
for details on other error codes related to the
indoor unit.
8.6 Rectifications after Test Run is
Completed with Exceptions
The test run is considered complete when there is no
error code on the user interface or the outdoor unit
display. When an error code is displayed, rectify the
operation based on the description in the error code
table. Try to conduct the test run again to check if the
exception has been corrected.
Set the number of
IDUs, displays "01 01"
Change the number of
IDUs, displays "01 YZ"
Change the communication
protocol if necessary
The system is automatically
addressed, display "AU Ad"
and "X YZ" in rotation
System is initialized,
display " InIt " and "X YZ" in
rotation
Complete commissioning
mode and no fault, enter
standby mode, displays "X
YZ"
Long press the “DOWN” and
“UP” buttons simultaneously
for 5s on the ODU to enter
the commissioning
Short press the “DOWN” and
“UP” button to change the
number of IDUs
Short press the “OK” button
to confirm and automatically
proceed to the next step
Short press the “DOWN” and
“UP” button to change the
communication protocol
Short press the “OK” button to
confirm and automatically
proceed to the next step
Takes 3-5 minutes and
automatically proceed to the
next step after completion
Option
Takes 3-5 minutes and
automatically proceed to the
next step after completion
Short press “MENU”
button to return to
previous level
Short press “MENU”
button to return to
previous level
Short press “MENU”
button to return to
previous level
Set the communication
protocol, displays "02 0"
Set the refrigerant shut-off
Device
Option
Other settings
Menu
"n11" set "2"
Test run
The system is powered
on and display “-.-.-.-.”
Test run flow chart