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ENGLISH
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.
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)
Wait for 3 min. after power reset
Start
Main PCB
SW01S
Set the DIP swtich.
Refrigerant Auto Changing : 1,2,7 ON
Main PCB
SW01B
SW02B
Press the black button on main PCB.
Is it necessary to
charge refrigerant?
Press the black button for 2 s after turning off
all of DIP swtich.
Yes
No
Press the black button on main PCB.
( Press until ‘508’ is displayed )
Main PCB
SW01V
IDU runs with cooling mode In designated order.
Main PCB
SW01V
Press the black button
IDU and ODU are turned off when Auto Charging
is completed. Close the valve.
Press the black button
Note 1)
Refrigerant Auto
Charging Process
Main PCB
SW01V
Completed.
Note 2)
Note 3)
Capillary Assembly
Charging
port
manifold
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.
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.
!
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.
Wait for 3 min. after power reset
Start
Main
PCB
SW01S
Set the DIP S/W.
Refrigerant Checking : 1,2,7,14 ON
Main
PCB
SW01B
SW02B
Press the black button on main PCB
Press the black button for 2 s after
turning off all of DIP S/W.
Completed
Press the black button on main PCB.
( Press until ‘608’ is displayed )
Main
PCB
SW01V
IDU runs with cooling mode in order.
Main
PCB
SW01V
Press the black button on main PCB
Main
PCB
SW01V
Note 1)
IDU, ODU are turned off
Note 2)
Judging
Refrigerant
Amount
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.
Excess of
Refrigerant
Scarcity of
Refrigerant
Impossible
To Judge
Summary of Contents for ARUN40GS2A
Page 35: ......
