Caution For Refrigerant Leak - LG Multi V PRHR033 Installation Manual

Display
2 0 0 1 Searching pipe Error
2 0 1 #HR + h HR unit1 Liqiud sensor error
2 0 2 #HR + h HR unit1 Sub Cooling Pipe sensor error
2 0 3 #HR + h HR unit1 Sub Cooling Pipe Out sensor error
2 0 4 #HR + h Communication error
#HR + h Communication error between HR unit and the
2 0 5
upgraded 485 modem.
#HR + h
2 0 6 Duplicate address error of HR unit
#HR + h Communication error between Master and Slave
2 0 7
Main PCB of HR Unit
2 0 8 #HR + h Communication error of EEPROM of HR Unit
2 4 2 * Network error of cntral controller
h : 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
per unit air volume) for facilitating calculation.
Limiting concentration: 0.44 kg/m
Outdoor unit
Flow of
(No.1 system)
refrigerant
Indoor unit
Checking procedure of limiting concentration
Check limiting concentration along following steps and take
appropriate measure depending on the situation.
Calculate amount of all the replenished refrigerant (kg) per each
refrigerant 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
Title
3 3
(lbs/ft ) (Freon gas weight
3 3
(0.028 lbs/ft )(R410A)
Room where refrigerant leaks
(Refrigerant of the whole No.1
system flows out.)
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.
Cause of Error
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
4 series upgraded 485 communication error between
HR unit and HR unit modem
When the HR unit address is set duplicated at the 4 series
upgraded 485 communication
When fail to communication between Master and Slave Main PCB
of HR Unit
When fail to communication of EEPROM of HR Unit
Communication wiring defect
Calculate minimum room capacity
Calculate room capacity by regarding a portion as one room or the
smaller room.
- Without partition
Outdoor unit
Indoor unit
- With partition and without opening which serve as passage of air to
adjoining room
Smallest
room
Calculate refrigerant concentration
Total amount of replenishedrefrigerant
in refrigerant facility [kg(lbs)]
Volume of smallest room where indoor
3 3
unit is installed [m (ft )]
- In case the result of calculation exceeds the limiting concentration, perform
the same calculations by shifting to the second smallest, and the third
smallest rooms until at last the result is below the limiting concentration.
- 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)
Outdoor unit
Indoor unit
3
= Maximum concentration limit[kg/m (lbs/ft
(R410A)
55
3
)]