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i. Pipe temperature limitation/restriction

• Detects the Outdoor pipe temperature and carry out below restriction/limitation (Limit the compressor Operation frequency)
• The compressor stop if outdoor pipe temperature exceeds 63

°C.

• If the compressor stops 4 times in 20 minutes, Timer LED blinking (F95: outdoor high pressure rise protection)

1. To prevent dew formation at indoor unit discharge area.
2. This control activated if:

• Outdoor air temperature and Indoor pipe temperature judgment by microcontroller if fulfilled.
• When Cooling or Dry mode is operated more than 20 minutes or more.

3. This control stopped if:

• Compressor stopped.
• Remote control setting changed. (fan speed / temperature)
• Outdoor air temperature and indoor intake temperature changed.

1. To prevent dew formation at indoor unit discharge area.
2. This control starts if all conditions continue for 20 minutes:

• Operated with Cooling or Soft Dry Mode.
• Indoor intake temperature is between 25

°C and 29°C.

• Outdoor air temperature is less than 30

°C.

• Quiet Lo fan speed.

3. This control stopped if:

• When receive air swing change signal from Remote Control.

1. When indoor heat exchanger temperature is lower than 7

°C continuously for six minutes, compressor will stop operating.

2. Compressor will resume its operation 3 minutes after the indoor heat exchanger is higher than 13

°C.

3. At the same time, indoor fan speed will be higher than during its normal operation.
4. If indoor heat exchanger temperature is higher than 13

°C for 5 minutes, the fan speed will return to its normal operation.

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Compressor will operate at maximum frequency if below conditions occur:

1. When the indoor intake air temperature is 30

°C or above.

The maximum current value is regulated when the outdoor air temperature rises above 14

°C in order to avoid compressor

overloading.

The compressor operating frequency is regulated in accordance to indoor heat exchanger temperature as shown in below figures.
If the heat exchanger temperature exceeds 60

°C, compressor will stop.

When indoor pipe temperature is low, cold draught operation start where indoor fan speed will be reduced.

When outdoor pipe temperature and outdoor temperature is low, deice operation start where indoor fan motor and outdoor fan
motor stop and operation LED blinks.

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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 occur at the fifth seconds, in order to identify the starting of Test Run operation (Forced cooling operation). Within 5
minutes after Forced cooling operation start, the Auto OFF/ON button is pressed for more than 5 seconds. A 2 “beep” sounds
will occur at the fifth seconds, in order to identify the starting of cooling operation. Within 5 minutes after cooling
operation start, the Auto OFF/ON button is pressed for more than 5 seconds. A 3 “beep” sounds will occur at the fifth seconds,
in order to identify the starting of Forced heating operation.

The Auto OFF/ON button may be used together with remote control to set / change the advance setting of air conditioner
operation.

3. REMOTE CONTROL NUMBER SWITCH MODE

The Remote Control Number Switch Mode will be activated if the Auto OFF/ON button is pressed continuously for more than
11 seconds (3 “beep” sounds will occur at 11th seconds to identify the Remote Control Number Switch Mode is in standby
condition) and press “Timer Decrement” button at remote control to transmit and store the desired transmission code to the
EEPROM.

For transmission code selection explanation, please refer to “Select Remote Control Transmission Code”.

4. REMOTE CONTROL RECEIVING SOUND OFF/ON MODE

The Remote Control Receiving Sound OFF/ON Mode will be activated if the Auto OFF/ON button is pressed continuously for
more than 16 seconds (4 “beep” sounds will occur at 16th seconds to identify the Remote Control Receiving Sound Off/On
Mode is in standby condition) and press “Timer Decrement” and then press “Check” button at remote control.

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

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• There are 4 types 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 units installed nearby together.

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

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