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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.

• 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.

1. When the switch is pressed between 0 to 5 seconds, Auto Mode operation starts to function.
2. When the switch is pressed between 5 to 8 seconds, the unit is forced to operate in Cooling Mode.
3. When the switch is pressed between 8 to 11 seconds, the unit will enter forced Heating Mode standby. Press timer decrement

button for 5s for the unit to operate in Heating Mode.

4. When the switch is pressed between 11 to 16 seconds and together with the signal from remote control (timer decrement

button for 5s), the unit can be changed to different controlling setting (4 type of transmission codes).

5. When the switch is pressed between 16 to 21 seconds, either “H14” error detection selection mode or the remote control

signal receiving sound can be cancelled or turned on.

1. When indoor heat exchanger temperature is lower than 2

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

2. Compressor will resume its operation three minutes after the indoor heat exchanger is higher than 10

°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 10

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

LED

POWER

TIMER

QUIET

POWERFUL

AIR SWING

Color

Green

Orange

Orange

Orange

Orange

Light ON

Operation ON

Timer Setting ON

Quiet Mode ON

Powerful Mode ON

Auto Air Swing ON

Light OFF

Operation OFF

Timer Setting OFF

Quiet Mode OFF

Powerful Mode OFF Auto Air Swing OFF

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a. Purpose
To prevent dew.

b. Control start conditions
When indoor units are ceiling floor, duct and mini-cassette.
c. Control contents
Hz control is carried out according to the dew prevention status transmitted from indoor.

Change is once to 10 seconds.
* Once the stand-up went into the down domain by Fcmax as for the Fcmax domain, it shifts to relative changes control domain.

When the higher rank of relative control has this control and the status signal od 2-3 has come out.
Relative change control is stopped and follows directions of spray control.
Priority is given to the which is larger when freeze prevention down status and dew prevention down status are transmitted
simultaneously.
In the case of dew prevention status   0, it is referred to as maxFc.

1. The compressor will not start for three minutes after stop of operation.
2. This control is not applicable if the power supply is cut off for 20 seconds and on again or after 4-way valve deices condition.

1. Once compressor starts operation, it will not stop its operation for 30 seconds.
2. However, it can be stopped using remote control or Auto Switch at indoor 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.

Dew prevention                               

status (transmitted indoor)

Control contents

Relative control domain

MAX domain

0 (it usually controls)

Usually, control

Usually, control

1 (rise)

Relative change control priority

On tap up/10 seconds

2 (changeless)

Changeless

Changeless

3 (down)

-2 Hz/10 seconds

-2 Hz/10 seconds

Model

CU-E9GFE

CU-E12GFE

CU-E18GFE

Operation Mode

X (A)

Y (A)

X (A)

Y (A)

X (A)

Y (A)

Cooling/Dry (A)

4.0

16.8

5.4

16.8

8.74

17

Cooling/Dry (B)

3.6

16.8

5.0

16.8

7.70

17

Heating

5.5

16.8

8.4

16.8

10.71

17

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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 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 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 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.

Control will perform when (1) - (3) condition continues operation for 5 minute and (4) is fulfill.

1. During cooling and dry operation: Frequency more than normal Fcmax.

During heating operation: Frequency more than normal Fh

2. Outdoor total current I cooling: Ib I<Ia

Heating: Ib I<Ic
Ic = Ia = 1.65 A
Ib = 0.65 A

3. It is not during deice operation.

During heating operation: Frequency more than normal Fh

4. During cooling and dry operation: indoor suction-indoor piping temperature is below 4

°C.

During of heating operation: Indoor piping temperature-indoor suction is under 5

°C.

Control contents:

• compressor stops (restart after 3 minutes)
• if happen 2 times within (20 minutes), perform the following operation

1) Unit stop operation
2) 7 segment “F91” indicated

Control will perform when (1) - (3) condition continues operation for 5 minute and (4) is fulfill.

1. During cooling and dry operation: Frequency more than normal Fc.

Air-temperature: Indoor and outdoor 30±5 degrees C
Remote control Hi; 16 degrees C
During Heating operation: Frequency more than Fh
Air temperature: Indoor and outdoor 20±2 degrees C
Remote control Hi; 30 degrees C

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2. Outdoor total current I Air conditioning: 0.65<=I<1.65.

Heating: 0.65<=I<1.65
It is not during deice operation

3. During cooling and dry operation: indoor suction-indoor piping temperature is below 4

°C.

During heating operation: Indoor piping temperature-indoor suction is under 5

°C.

Control contents:

• compressor stops (restart after 3 minutes)
• if happen 2 times within (20 minutes), perform the following operation

1) Unit stop operation
2) 7 segment “F91” indicated

When the compressor operate at frequency lower than 25 Hz continued for 20 minutes, the operation frequency will be increased
to 20 Hz for two minutes.

When all the below conditions occur, minimum value (Freq. MIN) for the frequency instructed to compressor will change to 30 Hz
for cooling mode operation and 20 Hz for heating mode operation.

In order to control DC current rise in a compressor low frequency region, load is detected with from indoor/outdoor heat
exchanger temperature, Hz control is performed.

Control contents

1. During cooling and dry except test mode

2. During heating compressor operation, except test mode.

Temperature, T, for:

Cooling/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