29
ENGLISH
Checking procedure of limiting concentration
Check limiting concentration along following steps and take appropri-
ate measure depending on the situation.
Calculate amount of all the replenished refrigerant (kg) per each refrig-
erant system.
Calculate minimum room capacity
Calculate room capacity by regarding a portion as one room or the
smaller room.
- With partition and with opening
which serve as passage of air to
adjoining room
- Without partition
Limiting concentration is the limit of Freon gas concentration
where immediate measures can be taken without hurting human
body when refrigerant leaks in the air. The limiting concentration
shall be described in the unit of kg/m
3
(Freon gas weight per unit
air volume) for facilitating calculation.
Limiting concentration: 0.44kg/m
3
(R410A)
Amount of additional
replenished refrigerant
Total amount of replenished
refrigerant in refrigerant
facility (kg)
+
=
Note : In case one refrigerant facility is
divided into 2 or more refrigerant
systems and each system is
independent, amount of replenished
refrigerant of each system shall be
adopted.
Amount of replenished
refrigerant per one outdoor
unit system
Amount of replenished
refrigerant at factory shipment
Amount of additionally
replenished refrigerant
depending on piping
length or piping
diameter at customer
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Opening
Partition
In the case of opening
without door , or 0.15
% or more openings
(to floor space) both
above and below door)
Outdoor unit
(No.1 system)
Flow of
refrigerant
Indoor unit
Room where refrigerant leaks
(Refrigerant of the whole No.1
system flows out.)
The installer and system specialist shall secure safety against leakage
according to local regulations or standards.
The following standards may be applicable if local regulations are not
available.
Introduction
Though the R410A refrigerant is harmless and incombustible itself ,
the room to equip the air conditioner should be large to such an extent
that the refrigerant gas will not exceed the limiting concentration even
if the refrigerant gas leaks in the room.
Limiting concentration
CAUTION FOR REFRIGERANT
LEAK
Ou
td
oo
r
u
nit
relate
d
e
rr
o
r
1
0
4
*
Communication Error Between Master Outdoor
Unit and Other Outdoor Unit
Failing to receive Slave Unit signal at main PCB of Master Out-
door Unit
1
0
5
*
Master Outdoor Unit Fan PCB Communication
Error
Failing to receive fan signal at main PCB of Master unit.
1
0
6
*
Master Outdoor Unit FAN IPM Fault Error
Instant Over Current at Master Outdoor Unit Fan IPM
1
0
7
*
Master Outdoor Unit Fan DC Link Low Voltage
Error
Master Outdoor Unit Fan DC Link Input Voltage is under 380V
1
1
3
*
Master Outdoor Unit Liquid pipe Temperature Sen-
sor Error
Liquid pipe temperature sensor of Master Outdoor Unit is open
or short
1
1
4
*
Master Outdoor Unit Subcooling Inlet Temperature
Sensor Error
Master Outdoor Unit Subcooling Inlet Temperature Sensor Error
1
1
5
*
Master Outdoor Unit Subcooling Outlet Tempera-
ture Sensor Error
Master Outdoor Unit Subcooling Outlet Temperature Sensor
Error
1
1
6
*
Master Outdoor Unit Oil Level Sensor Error
Oil Level Sensor of Master Outdoor Unit is open or short
1
4
5
*
Master outdoor unit Main Board - External Board
communication Error
Master outdoor unit Main Board - External Board communication
Error
1
5
1
*
Failure of operation mode conversion at Master
Outdoor Unit
Failure of operation mode conversion at Master Outdoor Unit
1
5
3
*
Master Outdoor Unit Heat Exchanger Temperature
Sensor (upper part) Fault
Master Outdoor Unit Heat Exchanger Temperature Sensor (upper
part) Fault
1
5
4
*
Master Outdoor Unit Heat Exchanger Temperature
Sensor (lower part) Fault
Master Outdoor Unit Heat Exchanger Temperature Sensor(lower
part) open or short
1
8
2
*
Master outdoor unit External Board Main-Sub
Micom communication Error
Master Outdoor Unit Main Board Main-Sub Micom communica-
tion failed
1
9
3
*
Master Outdoor Unit Fan Heatsink High Tempera-
ture
System is turned off by Master Outdoor Unit Fan Heatsink High
Temperature
1
9
4
*
Master Outdoor Unit Fan Heatsink Temperature
Sensor Fault
Master Outdoor Unit Fan Heatsink Temperature Sensor open or
short
Summary of Contents for ARUN BTE4 Series
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