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To provide quiet heating operation compare to normal operation.

a. Quiet operation start condition
•  When “quiet” button at remote control is pressed.

Quiet LED illuminates.

b. Quiet operation stop condition

1. When one of the following conditions is satisfied, quiet operation stops:

a. Powerful button is pressed.
b. Stop by OFF/ON switch.

c. Timer “off” activates.

d. Quiet button is pressed again.

2. When quiet operation is stopped, operation is shifted to normal operation with previous setting.
3. When fan speed is changed, quiet operation is shifted to quiet operation of the new fan speed.
4. When operation mode is changed, quiet operation is shifted to quiet operation of the new mode, except fan only mode.
5. During quiet operation, if timer “on” activates, quiet operation maintains. 
6. After off, when on back, quiet operation is not memorised.

a. Fan Speed Auto
•  Indoor FM RPM depends on pipe temperature sensor of indoor heat exchanger.

Auto fan speed is changed from normal setting to quiet setting of respective fan speed.
This is to reduce sound of Hi, Me, Lo for 3dB.

b. Fan Speed Manual
•  Manual fan speed for quiet operation is - 1 step from setting fan speed.

c. Compressor frequency reduced.

When the powerful mode is selected, the internal setting temperature will shift higher up to 3.5

°C (for Heating) or lower up to 2°C

(for Cooling/Soft Dry) than remote control setting temperature for 20 minutes to achieve the setting temperature quickly.

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ON timer can be set using remote control, the unit with timer set will start operate earlier than the setting time. This is to provide a
comfortable environment when reaching the set ON time.

60 minutes before the set time, indoor (at fan speed of Lo-) and outdoor fan motor start operate for 30 seconds to determine the
indoor intake air temperature and outdoor air temperature in order to judge the operation starting time.

From the above judgment, the decided operation will start operate earlier than the set time as shown below.

OFF timer can be set using remote control, the unit with timer set will stop operate at set time.

1. When the power supply is cut off during the operation of air conditioner, the compressor will re-operate within three to four

minutes (there are 10 patterns between 2 minutes 58 seconds and 3 minutes 52 seconds to be selected randomly) after
power supply resumes. 

2. This type of control is not applicable during ON/OFF Timer setting.

Note:

• If POWER LED is blinking, the possible operation of the unit are Hot Start, during Deice operation, operation mode judgment, or

ON timer sampling.

• If Timer LED is blinking, there is an abnormality operation occurs.

LED

POWER

TIMER

QUIET

POWERFUL

Color

Green

Orange

Orange

Orange

Light ON

Operation ON

Timer Setting ON

Quiet Mode ON

Powerful Mode ON

Light OFF

Operation OFF

Timer Setting OFF

Quiet Mode OFF

Powerful Mode OFF

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• The Compressor will not turn on within 3 minutes from the moment operation stops, although the unit is turned on again by

pressing OFF/ON button at remote control within this period.

• This control is not applicable if the power supply is cut off and on again.
• This phenomenon is to balance the pressure inside the refrigerant cycle.

• Once the air conditioner is turned on, the compressor will not stop within 30 seconds in a normal operation although the intake air

temperature has reached the thermo-off temperature. However, force stop by pressing the OFF/ON button at the remote
control is permitted or the Auto OFF/ON button at indoor unit.

• The reason for the compressor to force operation for minimum 30 seconds is to allow the refrigerant oil run in a full cycle and

return back to the outdoor unit.

1. When the outdoor unit total running current (AC) exceeds X value, the frequency instructed for compressor operation will be

decreased.

2. If the running current does not exceed X value for five seconds, the frequency instructed will be increased.

3. However, if total outdoor unit running current exceeds Y value, compressor will be stopped immediately for 3 minutes.

4. The first 30 minutes of cooling operation, (A) will be applied.

E10HB

E15HB

E18HB

Operation Mode

 X (A)

Y (A)

 X (A)

Y (A)

 X (A)

Y (A)

Cooling/Soft Dry (A) & (C)

4.95

15.06

7.79

15.06

8.83

15.06

Cooling/Soft Dry (B)

4.43

15.06

6.06

15.06

7.79

15.06

Heating

6.21

15.06

9.00

15.06

10.08

15.06

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A. Overheating Prevention Control

1. When the IPM temperature rises to 110

°C, compressor operation will stop immediately.

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

°C.

B. DC Peak Current Control

1. When electric current to IPM exceeds set value of 22.33 ± 5.0 A, the compressor will stop operate. Then, operation will restart

after three minutes.

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

minutes. 

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

this condition repeats continuously for seven 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 112

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

blinking (“F97” is to be confirmed).

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.
Compressor frequency will adjust base on Outdoor Air Temperature.