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1. AUTO OPERATION MODE

The Auto operation will be activated immediately once the Auto OFF/ON button is pressed. This operation can be used to
operate air conditioner with limited function if remote control is misplaced or malfunction.

2. TEST RUN OPERATION (FOR PUMP DOWN/SERVICING PURPOSE)

The Test Run operation will be activated if the Auto OFF/ON button is pressed continuously for more than 5 seconds. A “beep”
sound will be heard at the fifth seconds, in order to identify the starting of this operation.

3. VARIOUS SETTING MODE

The Various Setting mode will be activated if (within 20 seconds of Test Run Operation) the Auto OFF/ON button is pressed
for more than 5 seconds. 2 “beep” sound will be heard at to identify the starting of this  operation.
Under Various Setting  mode, user could perform the following operation:

a. REMOTE CONTROL RECEIVING SOUND OFF/ON

Press Auto OFF/ON button to toggle remote control receiving sound.
- Short “beep”: Turn ON remote control receiving sound.
- Long “beep”: Turn OFF remote control receiving sound.

After Auto OFF/ON Button is pressed, the 20 seconds counter for Remote Control Receiving Sound OFF/ON Mode is
restarted.

b. REMOTE CONTROL NUMBER SWITCH

• There are 4 type of remote control transmission code could be selected and stored in EEPROM of indoor unit. The indoor

unit will only operate when received signal with same transmission code from remote control. This could prevent signal
interference when there are 2 or more indoor unit installed nearby together.

• To change remote control transmission code, short or open jumpers at the remote control printed circuit board.

• Under various setting mode, after select the transmission code combination of remote control, press any button of remote

control to transmit a signal to indoor unit. The transmission code will be stored in EEPROM.

• After signal is received, the various setting mode is cancelled and return to normal operation.
• If there is no code is transmitted or AUTO OFF/ON button is not pressed within 20 seconds, the Various Setting mode will

be cancelled.

Remote Control Printed Circuit Board

Transmission Code Combination

J-A

J-B

Remote Control No.

* Short

Open

A (default)

Open

Open

B

Short

Short

C

Open

Short

D

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• To check current remote control transmission code and store the transmission code to EEPROM.

- Press “SET” button for more than 10 seconds.
- Press “TIMER SET” button until a “beep” sound is heard as confirmation of transmission code change.

• 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 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.

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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 to 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

Condition of the air

conditioner

Low Pressure

High Pressure

Electric current during operation

Insufficient refrigerant

(gas leakage)

Clogged capillary tube or

Strainer

Short circuit in the indoor unit

Heat radiation deficiency of the 

outdoor unit

Inefficient compression

Nature of fault

Symptom

• Electric current during operation becomes approximately 20% lower than the normal value.

Insufficient compressing of a compressor

• The discharge tube of the compressor becomes abnormally hot (normally 70 to 90

°C).

• The difference between high pressure and low pressure becomes almost zero.

• Electric current reaches a high level abnormally, and the value exceeds the limit of an

ammeter. In some cases, a breaker turns off. 

Locked compressor

• The compressor has a humming sound.