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Connect the charge hose end described in the
preceding steps to the vacuum pump to evacuate
the tubing and indoor unit.
Confirm the "Lo" knob of the manifold valve is
open. Then, run the vacuum pump.
The operation time for evacuation varies with tub-
ing length and capacity of the pump. 
The following table shows the time required for
evacuation.

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When the desired vacuum is reached, close the
"Lo" knob of the manifold valve and stop the vac-
uum pump.

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With a service valve wrench, turn the valve stem
of liquid side valve counter-clockwise to fully open
the valve.

■

Turn the valve stem of gas side valve counter-
clockwise to fully open the valve.

■

Loosen the charge hose connected to the gas
side service port slightly to release the pressure,
then remove the hose.

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Replace the flare nut and its bonnet on the gas
side service port and fasten the flare nut securely
with an adjustable wrench. This process is very
important to prevent leakage from the system.

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Replace the valve caps at both gas and liquid
side service valves and fasten them tight.

This completes air purging with a vacuum pump. 
The air conditioner is now ready to test run.

(1) Remove the caps from the 2-way and 3-way valves.
(2) Remove the service-port cap from the 3-way valve.
(3) To open the 2-way valve turn the valve stem counter-

clockwise approximately 90°, wait for about 2~3 sec,
and close it.

(4) Apply a soap water or a liquid neutral detergent on the

indoor unit connection or outdoor unit connections by a
soft brush to check for leakage of the connecting points
of the piping.

(5) If bubbles come out, the pipes have leakage.

Control
cover 

Liquid side
(Smaller diameter)

Gas side
(Bigger diameter)

2-way valve
(open)

3-way valve
(close)

Cap

Service port cap

Hexagonal wrench

Terminal block
(pillar terminal)

Required time for evacuation 

when 30 gal/h vacuum pump is used

10 min. or more

15 min. or more

If tubing length is less

than 10m (33 ft)

If tubing length is longer

than 10m (33 ft)

Indoor unit

Outdoor unit

Lo Hi

Manifold valve

Vacuum pump

Pressure 
gauge

Open

Close

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• If power is on, it will operate to chage capacitor (330µF/450WV) on controller and power relay will oper-

ate after about 2~5sec.

• If outdoor temp. is below 0°C, preheater is operating for 1~5min.
• At the initial, It will be operated compressor after 1min. for preheating.

• The active power filter is designed to correct power factor(cos 

θ

) and to regulate DC link voltage.

• It will be operated PFC circuit when the compressor freq. is over 12Hz.
• If DC link voltage is not over DC 350V in 6 sec. in case of PFC on, it does not operating of compressor.

• The final operating freq. of comp. is set the lowest freq. that limited outdoor temp., discharge pipe temp.,

heat-sink temp., target freq., owing to CT.

• When the temp. of power module increases to 85°C, controller decreases Freq. of Comp.

• It will be changed the drive freq. of comp. according to temp. of indoor and outdoor.

• It will be changed the drive voltage of comp. according to operating frequency.

• It is only operated in the heating operation mode except defrosting operation.

• High speed

- Although fan motor speed is low, it will change high speed in case of below AC193V, over 45°C of out-

door temp., and over fc, fh of comp. Freq.

• Low speed

- Nomal mode and over AC270V

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1. Check that all tubing and wiring have been properly

connected.

2. Check that the gas and liquid side service valves

are fully open.

Remove the battery cover 
by pulling it according to the

arrow direction.

Insert new batteries making 
sure that the (+) and (–) of 
battery are installed correctly.
Reattach the cover by

pushing it back into position.

Anchor the outdoor unit with a bolt and
nut(ø10mm) tightly and horizontally on a con-
crete or rigid mount.
When installing on the wall, roof or rooftop,
anchor the mounting base securely with a nail or
wire assuming the influence of wind and earth-
quake.
In the case when the vibration of the unit is con-
veyed to the hose, secure the unit with an anti-
vibration rubber.

Operate unit for 15~20 minutes, then check the sys-
tem refrigerant charge:

NOTE: If the actual pressure are higher than shown,

the system is most likely over-charged, and
charge should be removed. If the actual pres-
sure are lower than shown, the system is most
likely undercharged, and charge should be
added.

The air conditioner is now ready for use.

Bolt

Tubing connection

Outside ambient TEMP The pressure of the gas side service valve

35°C(95°F)

4.5~5.5kg/cm

2

G(63.9~78.1 P.S.I.G.)

This is performed when the unit is to be relocated
or the refrigerant circuit is serviced.
Pump Down means collecting all refrigerant in the out-
door unit without loss in refrigerant gas.

CAUTION:
Be sure to perform Pump Down procedure with the
unit cooling mode.

Pump Down Procedure
1. Connect a low-pressure gauge manifold hose to the

charge port on the gas side service valve.

2. Open the gas side service valve halfway and purge the

air from the manifold hose using the refrigerant gas.

3. Close the liquid side service valve(all the way in).
4. Turn on the unit's operating switch and start the cool-

ing operation.

5. When the low-pressure gauge reading becomes 1 to

0.5kg/cm2 G(14.2 to 7.1 P.S.I.G.), fully close the gas
side valve stem and then quickly turn off the unit. At
that time, Pump Down has been completed and all
refrigerant gas will have been collected in the outdoor
unit.

Battery Cover

Discharge 
temperature

Discharge air

Intake temperature

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ON

PLASMA

OFF

SET

CANCEL

Signal transmitter

4

5

6

7

1

2

3

8

Heat pump model

Cooling model

ON/OFF TIMER BUTTONS
Used to set the time of starting and stopping
operation.

Used to adjust the time. 

Used to set the timer when the desired time is
obtained and to cancel the Timer operation.

Used to set Sleep Mode Auto operation.

AIR CIRCULATION BUTTON
Used to circulate the room air without cooling or
heating (turns indoor fan on/off).

ROOM TEMPERATURE CHECKING BUTTON
Used to check the room temperature.

Used to start or stop the plasma-purification
function.

Used prior to resetting time or after replacing
batteries.

1

2

3

4

5

6

7

8