LG ARUN50GS2A Quick Manual page 27

Refrigerant Auto Charging Function (U3 Chas-
sis, 2Fan Model)
This function charges appropriate amount of refrigerant automatically
through cycle operation.
It can be used when refrigerant amount Isn't certain because of SVC
and leakage.
Start
Main PCB
Wait for 3 min. after power reset
SW01S
Main PCB
Set the DIP swtich.
SW01B
Refrigerant Auto Changing : 1,2,7 ON
SW02B
Main PCB
Press the black button on main PCB.
( Press until '508 ' is displayed )
SW01V
Main PCB
Press the black button on main PCB.
SW01V
IDU runs with cooling mode In designated order.
Is it necessary to
charge refrigerant?
No
IDU and ODU are turned off when Auto Charging
is completed. Close the valve.
Main PCB
Press the black button
SW01V
Press the black button for 2 s after turning off
all of DIP swtich.
Completed.
Charging
port
Procedure
- Arrange manifold, capillary assembly, refrigerant vessel and scale.
- Connect manifold to the gas pipe service valve of ODU as shown in
the figure.
- Connect manifold and Capillary tube.
Use designated capillary assembly only.
If designated capillary assembly isn't used, the system may get dam-
aged.
- Connect capillary and refrigerant vessel.
- Purge hose and manifold.
- After is displayed, open the valve and charge the refrigerant.
Note
1. After installing the refrigerant charging device
as shown below in figure, open the valve.
2. In case air temperature is out of guaranteed temperature,
it may end without performing auto charging.
3. Refrigerant auto charging may over without using capillary
assembly by sudden inflow of liquid state refrigerant.
4. Refrigerant Charging Time may change according to the
charging amount. (Refrigerant Charging Time : about 3
min./kg)
Yes
Note 1)
Press the black button
Refrigerant Auto
Charging Process
Note 2)
manifold
Capillary Assembly
Error contents about auto refrigerant charging function
: Temperature Range Error
(In case that IDU or ODU is out of range)
: Low Pressure Descent Error
(In case the system runs at low pressure limit for over 10
minutes)
: Judging rapid refrigerant inflow
( In case the liquid refrigerant flows in because of not using
designated Capillary Assembly)
: Instability Error
( In case the high/low pressure target doesn't get satisfied
for some time after the starting operation)
CAUTION
!
• Guaranteed temperature range (Error will occur if temperature is
out of range)
IDU : 20~32°C
ODU : 0~43°C
• For refrigerant charging, use designated device only. (Capillary
Assem Set)
• Set the IDU wired remote controller temperature sensing mode as
IDU
• Be careful that IDU should not be thermo off.
Note 3)
Refrigerant Checking Function (U3 Chassis,
2Fan Model)
This function charges appropriate amount of refrigerant automatically
through cycle operation.
This function judges refrigerant leakage and overcharging.
Start
Main
PCB Wait for 3 min. after power reset
SW01S
Main
PCB Set the DIP S/W.
SW01B
Refrigerant Checking : 1,2,7,14 ON
SW02B
Main
Press the black button on main PCB.
PCB
( Press until '608 ' is displayed )
SW01V
Main
Press the black button on main PCB
PCB
SW01V
IDU runs with cooling mode in order.
Judging
Refrigerant
Amount
Excess of Scarcity of
Refrigerant Refrigerant
IDU, ODU are turned off
Main
Press the black button on main PCB
PCB
SW01V
Press the black button for 2 s after
turning off all of DIP S/W.
Completed
Note
1. In case air temperature is out of guaranteed
temperature, refrigerant checking function may end
without performing refrigerant checking.
Use guaranteed temperature range only.
2. During the process of judging refrigerant amount, if
the cycle isn't stable, refrigerant checking function
may end without performing refrigerant checking.
Impossible
To Judge
Note 2) Note 1)
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