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4. Close the Low side valve of the charging set and turn off the vacuum pump. Make sure that the needle in the gauge does not

move after approximately five minutes.
Note: BE SURE TO TAKE THIS PROCEDURE IN ORDER TO AVOID REFRIGERANT GAS LEAKAGE.

5. Disconnect the charging hose from the vacuum pump and from the service port of the 3-way valve.
6. Tighten the service port caps of the 3-way valve at a torque of 18 N

•

m with a torque wrench.

7. Remove the valve caps of both of the 2-way valve and 3-way valve. Position both of the valves to “OPEN” using a hexagonal

wrench (4 mm).

8. Mount valve caps onto the 2-way valve and the 3-way valve.

• Be sure to check for gas leakage.

1. Remove the control board cover from the unit by

loosening the screw.

2. Cable connection to the power supply through Isolating

Devices (Disconnecting means).

• Connect approved type polychloroprene sheathed

power supply cord 3 x 1.5 mm

2

 (1.0 ~ 1.5HP) type

designation 245 IEC 57 or heavier cord to the terminal
board, and connect the others end of the cord to
Isolating Devices (Disconnecting means).

3. Connecting cable between indoor unit and outdoor unit

shall be approved polychloroprene sheathed 4 x 1.5 mm

2

flexible cord, type designation 245 IEC 57 or heavier
cord.

4. Connect the power supply cord and connecting cable

between indoor unit and outdoor unit according to the
diagram below.

5. Secure the power supply cord and connecting cable onto the control board with the holder.
6. Attach the control board cover back to the original position with screw.

7. For wire stripping and connection requirement, refer to instruction   of indoor unit.

 This equipment must be properly earthed.

• Note: Isolating Devices (Disconnecting means) should have minimum 3.0 mm contact gap.
• Earth wire shall be Yellow/Green (Y/G) in colour and longer than other AC wires for safety reason.

1. Please carry out insulation at pipe connection portion as mentioned in Indoor/Outdoor Unit Installation Diagram. Please wrap

the insulated piping end to prevent water from going inside the piping.

2. If drain hose or connecting piping is in the room (where dew may form), please increase the insulation by using POLY-E

FOAM with thickness 6mm or above.

• If gauge needle does not move from 0 cmHg (0 MPa) to -76 cmHg (-0.1 MPa), in step 

 above take the following measure: 

- If the leak stops when the piping connections are tightened further, continue working from step 

.

- If the leak does not stop when the connections are retightened, repair the location of leak.
- Do not release refrigerant during piping work for installation and reinstallation. 
- Take care of the liquid refrigerant, it may cause frostbite. 

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Inverter control, which equipped with a microcomputer in determining the most suitable operating mode as time passes,
automatically adjusts output power for maximum comfort always. In order to achieve the suitable operating mode, the
microcomputer maintains the set temperature by measuring the temperature of the environment and performing temperature
shifting. The compressor at outdoor unit is operating following the frequency instructed by the microcomputer at indoor unit that
judging the condition according to internal setting temperature and intake air temperature.

Once the operation starts, remote control setting temperature will be taken as base value for temperature shifting processes. These
shifting processes are depending on the air conditioner settings and the operation environment. The final shifted value will be used
as internal setting temperature and it is updated continuously whenever the electrical power is supplied to the unit.

• Compressor is OFF when Intake Air Temperature - Internal Setting Temperature < -1.5

°C.

• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature > Compressor OFF

point.

• Compressor is OFF when Intake Air Temperature - Internal Setting Temperature < -2.0

°C.

• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature > Compressor OFF

point.

• Compressor is OFF when Intake Air Temperature - Internal Setting Temperature > +2.0

°C.

• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature < Compressor OFF

point.

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• This mode can be set using remote control and the operation is decided by remote control setting temperature, remote control

operation mode, indoor intake air temperature and outdoor air temperature.

• During operation mode judgment, indoor fan motor (with speed of Lo-) and outdoor fan motor are running for 30 seconds to

detect the indoor intake and outdoor air temperature. The operation mode is decided based on below chart.

• Every 30 minutes, the indoor and outdoor temperature is judged. Based on remote control setting temperature, the value of T1

will increase up to 10

°C, T2 will decrease by 3°C and T3 will decrease up to 8°C.

• The Auto Operation Mode shifting will take place whenever operation mode changed from Cool/Soft Dry to Heating or vice versa.

• Fan Operation is used to circulate air in a room.
• During operation, indoor fan run continuously but outdoor fan and compressor stop.
• Temperature setting is not applicable.

A. Basic Rotation Speed (rpm)
i. Manual Fan Speed
[Cooling, Dry, Fan]

• Fan motor’s number of rotation is determined according to remote control setting.

[Heating]

• Fan motor’s number of rotation is determined according to remote control setting.

ii. Auto Fan Speed
[Cooling, Dry]

• According to room temperature and setting temperature, indoor fan speed is determined automatically.
• The indoor fan will operate according to pattern below.

[Fan]

• Indoor fan speed is fixed at predetermined speed.

Remote  Control

O

O

O

O

O

Tab

Hi

Me+

Me

Me-

Lo

Remote  Control

O

O

O

O

O

Tab

SHi

Me+

Me

Me-

Lo

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[Heating]

• According to indoor pipe temperature, automatic heating fan speed is determined as follows.

• Immediately after the fan motor started, feedback control is performed once every second.

• During fan motor on, if fan motor feedback   2550 rpm or < 50 rpm continue for 10 seconds, then fan motor error counter

increase, fan motor is then stop and restart. If the fan motor counter becomes 7 times, then H19 - fan motor error is detected.
Operation stops and cannot on back.

Outdoor fan motor is operated with 15 fan speed number of rotations. It starts when compressor starts operation and it stops 30
seconds after compressor stops operation.

1. There are two types of airflow, vertical airflow (directed by horizontal vane) and horizontal airflow (directed by vertical vanes).
2. Control of airflow direction can be automatic (angles of direction is determined by operation mode, heat exchanger

temperature and intake air temperature) and manual (angles of direction can be adjusted using remote control).

1. Automatic vertical airflow direction can be set using remote control; the vane swings up and down within the angles as stated

above. For heating mode operation, the angle of the vane depands on the indoor heat exchanger temperature as Figure 1
below. When the air conditioner is stopped using remote control, the vane will shift to close position.

2. Manual vertical airflow direction can be set using remote control; the angles of the vane are as stated above and the positions

of the vane are as Figure 2 below. When the air conditioner is stopped using remote control, the vane will shift to close
position.

Operation Mode

Airflow Direction

Vane Angle (

°)

1

2

3

4

5

Heating

Auto with Heat Exchanger 
Temperature

A

20

B

58

C

33

Manual

20

33

45

58

70

Cooling and Fan

Auto

20 ~ 46

Manual

20

27

33

40

46

Soft Dry

Auto

20 ~ 46

Manual

20

27

33

40

46