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A. Overheating Prevention Control

1. When the IPM temperature rises to 100

°C, compressor operation will stop immediately.

2. Compressor operation restarts after 3 minutes the temperature decreases to 95

°C.

B. DC Peak Current Control

1. When electric current to IPM exceeds set value of 18.5 A, the compressor will stop operate. Then, operation will restart

after 3 minutes.

2. If the set value is exceeded again more than 30 seconds after the compressor starts, the operation will restart after 2

minutes.

3. If the set value exceeded again within 30 seconds after the compressor starts, the operation will restart after 1 minute. If

this condition repeats continuously for 7 times, all indoor and outdoor relays will be cut off.

Instructed frequency for compressor operation will be regulated by compressor discharge temperature. The changes of frequency
are as below figure.
If compressor discharge temperature exceeds 110

°C, compressor will be stopped, occurs 4 times per 20 minutes, timer LED will be

blinking. (“F97” is to be confirmed.)

a. Control start conditions

• For 5 minutes, the compressor continuously operates and outdoor total current is between 0.65A and 1.65A.
• During Cooling and Soft Dry operations:

Indoor suction temperature - indoor piping temperature is below 4

°C.

• During Heating operations :

Indoor piping temperature - indoor suction is under 5

°C.

b. Control contents

• Compressor stops (and restart after 3 minutes).
• If the conditions above happen 2 times within 20 minutes, the unit will:

- Stop operation
- Timer LED blinks and “F91” indicated.

a. Control start conditions

• For 5 minutes, the compressor continuously operates and outdoor total current is between 0.65A and 1.65A.
• During Cooling and Soft Dry operations:

Indoor suction temperature - indoor piping temperature is below 4

°C.

Indoor temperature and outdoor temperature is 30±5

°C.

Remote Control setting 16

°C and Hi Fan Speed.

• During Heating operations:

Indoor piping temperature - indoor suction is under 5

°C.

Indoor temperature and outdoor temperature is 20 ± 2

°C.

Remote control setting 30

°C and Hi Fan Speed.

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b. Control contents 

• Compressor stops (and restart after 3 minutes)
• If the conditions above happen 2 times within 20 minutes, the unit will:

- Stop operation
- Timer LED blinks and “F91” indicated

When the compressor operate at frequency lower than 24 Hz continued for 20 minutes, the operation frequency will be changed to
23 Hz for 2 minutes.

When all the below conditions occur, minimum value (Freq. MIN) for the frequency instructed to compressor will change to 29
(E7GK) ~ 35 (E9GK, E12GK, E15GK) Hz for cooling mode operation and 35 (E9GK, E12GK, E15GK) ~ 44 (E7GK) Hz for heating
mode operation.

The compressor operating frequency is regulated in accordance to the outdoor air temperature as shown in the diagram below.
This control will begin 1 minute after the compressor starts.

• Detects the Outdoor pipe temperature and carry out below restriction/limitation (Limit the compressor Operation frequency)
• The compressor stop if outdoor pipe temperature exceeds 61

°C

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

Temperature, T, for:

Cooling/Soft Dry

Heating

Indoor intake air (

°C)

T < 15 or T   30

—

Outdoor air (

°C)

T < 16 or T   38

T < 4 or T   24

Indoor heat exchanger (

°C)

T < 30

T  

0

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1. When indoor heat exchanger temperature is lower than 0

°C continuously for 6 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 increase +20 rpm compared to 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.

Compressor will operate at Max freq. if either one of the below conditions occur:

1. When the indoor intake air temperature is 30

°C or above.

The Max current value is regulated in accordance to the outdoor air temperature as shown in the below figures.

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

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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 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 any 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 “AC Reset” button 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.

• 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.