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• To check current remote control transmission code

- Press for more than 10 seconds.

• To change the air quality sensor sensitivity

- Press and release with pointer.
- Press the Timer Decrement button to select sensitivity:

1. Low Sensitivity
2. Standard (Default)
3. Hi Sensitivity

- Confirm setting by pressing Timer Set button, a “Beep” sound will be heard. LCD returns to original display after 2 seconds.
- LCD returns to original display if remote control does not operate for 30 seconds.

• To change the remote control’s time format

- Press for more than 5 seconds.

• To clear and restore the remote control setting to factory default

- Press once to clear the memory.

• To restore the unit’s setting to factory default

- Press once to restore the unit’s setting.

• To change indoor unit indicator’s LED intensity

- Press continuously for 5 seconds.

• To change remote control display from Degree Celsius to Degree Fahrenheit.

- Press continuously for 10 seconds.

Remote Control Printed Circuit Board

Jumper A (J-A)

Jumper B (J-B)

Remote Control No.

Short

Open

A (Default)

Open

Open

B

Short

Short

C

Open

Short

D

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In order to diagnose malfunctions, make sure that there are no
electrical problems before inspecting the refrigeration cycle.
Such problems include insufficient insulation, problem with the
power source, malfunction of a compressor and a fan.
The normal outlet air temperature and pressure of the
refrigeration cycle depends on various conditions, the standard
values for them are shown in the table on the right.

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• Carry out the measurements of pressure, electric current, and temperature fifteen minutes after an operation is started.

Cooling Mode

Heating Mode

 

Low Pressure

High Pressure

Electric current 

during operating

Low Pressure

High Pressure

Electric current 

during operating

Condition of the air 

conditioner

Insufficient refrigerant 

(gas leakage)

Clogged capillary tube 

or Strainer

Short circuit in the      

indoor unit

Heat radiation deficiency   

of the outdoor unit

Inefficient compression

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• Once abnormality has occurred during operation, the unit

will stop its operation, and Timer LED blinks.

• Although Timer LED goes off when power supply is turned

off, if the unit is operated under a breakdown condition, the
LED will light up again.

• In operation after breakdown repair, the Timer LED will no

more blink. The last error code (abnormality) will be stored in
IC memory.

• To make a diagnosis

1. Timer LED start to blink and the unit automatically stops

the operation.

2. Press the CHECK button on the remote controller

contiguously for 5 seconds.

3. “- -” will be displayed on the remote controller display.

Note: Display only for “- -”. (No transmitting signal, no
receiving sound and no Power LED blinking.)

4. Press the “TIMER”   or   button on the remote

controller. The code “H00” (no abnormality) will be
displayed and signal will be transmitted to the main unit.

5. Every press of the button (up or down) will increase

abnormality numbers and transmit abnormality code
signal to the main unit.

6. When the latest abnormality code on the main unit and

code transmitted from the remote controller are matched,
power LED will light up for 30 seconds and a beep sound
(continuously for 4 seconds) will be heard. If no codes are
matched, power LED will light up for 0.5 seconds and no
sound will be heard.

7. The breakdown diagnosis mode will be canceled unless

pressing the CHECK button continuously for 5 seconds or
operating the unit for 30 seconds.

8. The LED will be off if the unit is turned off or the RESET

button on the main unit is pressed.

• To display memorized error (Protective operation)

1. Turn power on.
2. Press the CHECK button on the remote controller

contiguously for 5 seconds.

3. “- -” will be displayed on the remote controller display.

Note: Display only for “- -”. (No transmitting signal, no
receiving sound and no Power LED blinking.)

4. Press the “TIMER”   or   button on the remote

controller. The code “H00” (no abnormality) will be
displayed and signal will be transmitted to the main unit.
The power LED lights up. If no abnormality is stored in the
memory, three beeps sound will be heard.

5. Every press of the button (up or down) will increase

abnormality numbers and transmit abnormality code
signal to the main unit.

6. When the latest abnormality code on the main unit and

code transmitted from the remote controller are matched,
power LED will light up for 30 seconds and a beep sound
(continuously for 4 seconds) will be heard. If no codes are
matched, power LED will light up for 0.5 seconds and no
sound will be heard.

7. The breakdown diagnosis mode will be canceled unless

pressing the CHECK button continuously for 5 seconds or
operating the unit for 30 seconds.

8. The same diagnosis can be repeated by turning power on

again.

• To clear memorized error (Protective operation) status

1. Turn power on.
2. Press the AUTO button for 5 seconds (A beep receiving

sound) on the main unit to operate the unit at Forced
Cooling Operation modes.

3. Press the CHECK button on the remote controller for

about 1 second with a pointed object to transmit signal to
main unit. A beep sound is heard from main unit and the
data is cleared.

• Temporary Operation (Depending on breakdown status)

1. Press the AUTO button (A beep receiving sound) on the

main unit to operate the unit. (Remote control will become
possible.)

2. The unit can temporarily be used until repaired.

Error Code

Operation

Temporary items

H23

Cooling

Emergency Operation

with limited power

H27, H28

Cooling, Heating