Caution For Refrigerant Leak; Introduction; Checking Procedure Of Limiting Concentration - LG MULTI V IV ARUB080BTE4 Installation Manual

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Communication Error Between Master Outdoor
1 0 4 *
Unit and Other Outdoor Unit
Master Outdoor Unit Fan PCB Communication
1 0 5 *
Error
1 0 6 * Master Outdoor Unit FAN IPM Fault Error
Master Outdoor Unit Fan DC Link Low Voltage
1 0 7 *
Error
Master Outdoor Unit Liquid pipe Temperature Sen-
1 1 3 *
sor Error
Master Outdoor Unit Subcooling Inlet Tempera-
1 1 4 *
ture Sensor Error
Master Outdoor Unit Subcooling Outlet Tempera-
1 1 5 *
ture Sensor Error
1 1 6 * Master Outdoor Unit Oil Level Sensor Error
Master outdoor unit Main Board - External Board
1 4 5 *
communication Error
Failure of operation mode conversion at Master
1 5 1 *
Outdoor Unit
Master Outdoor Unit Heat Exchanger Tempera-
1 5 3 *
ture Sensor (upper part) Fault
Master Outdoor Unit Heat Exchanger Tempera-
1 5 4 *
ture Sensor (lower part) Fault
Master outdoor unit External Board Main-Sub
1 8 2 *
Micom communication Error
Master Outdoor Unit Fan Heatsink High Tempera-
1 9 3 *
ture
Master Outdoor Unit Fan Heatsink Temperature
1 9 4 *
Sensor Fault
2 0 0 1 Searching pipe Error
2 0 1 C + #HR HR unit1 Liqiud sensor error
2 0 2 C + #HR HR unit1 Sub Cooling Pipe sensor error
2 0 3 C + #HR HR unit1 Sub Cooling Pipe Out sensor error
2 0 4 C + #HR Communication error
C: HR unit
#: HR unit Number

CAUTION FOR REFRIGERANT LEAK

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
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
air volume) for facilitating calculation.
Limiting concentration: 0.44kg/m
Outdoor unit
Flow of
(No.1 system)
refrigerant
Indoor unit
3
(Freon gas weight per unit
3
(R410A)
Room where refrigerant leaks
(Refrigerant of the whole No.1
system flows out.)
Failing to receive Slave Unit signal at main PCB of Master Out-
door Unit
Failing to receive fan signal at main PCB of Master unit.
Instant Over Current at Master Outdoor Unit Fan IPM
Master Outdoor Unit Fan DC Link Input Voltage is under 380V
Liquid pipe temperature sensor of Master Outdoor Unit is open
or short
Master Outdoor Unit Subcooling Inlet Temperature Sensor Error
Master Outdoor Unit Subcooling Outlet Temperature Sensor
Error
Oil Level Sensor of Master Outdoor Unit is open or short
Master outdoor unit Main Board - External Board communication
Error
Failure of operation mode conversion at Master Outdoor Unit
Master Outdoor Unit Heat Exchanger Temperature Sensor
(upper part) Fault
Master Outdoor Unit Heat Exchanger Temperature Sensor(lower
part) open or short
Master Outdoor Unit Main Board Main-Sub Micom communica-
tion failed
System is turned off by Master Outdoor Unit Fan Heatsink High
Temperature
Master Outdoor Unit Fan Heatsink Temperature Sensor open or
short
Failure of automatic addressing of valves
Liquid pipe sensor of HR unit open or short
Sub Cooling Pipe In sensor of HR unit open or short
Sub Cooling Pipe Out sensor of HR unit. open or short
Failing to receive HR unit signal at outdoor unit

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.
Amount of replenished Amount of additional
refrigerant per one outdoor + replenished refrigerant
unit system
Amount of replenished Amount of additionally
refrigerant at factory shipment replenished refrigerant
depending on piping
length or piping
diameter at customer
Calculate minimum room capacity
Calculate room capacity by regarding a portion as one room or the
smaller room.
- Without partition
Outdoor unit
Indoor unit
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.
- With partition and with opening
which serve as passage of air to
adjoining room
Outdoor unit
In the case of opening
Indoor unit
without door , or 0.15
Opening
% or more openings
(to floor space) both
Partition
above and below door)