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• Once abnormality has been detected during operation, the

unit will immediately stop its operation. (Timer LED blinks.)

• Although timer LED goes off when power supply is turned

off, if the unit is operated under a breakdown condition, the
LED will light up again.

• In operation after breakdown repair, error code is not

displayed. The last error code (abnormality) will be saved in
IC memory.

• Timer LED Blinking in Abnormal Operation:

1. Automatically stops the operation.
2. Timer LED on display of the indoor unit blinks.
3. The LED will be off if the unit is turned off or the Error

RESET button on the remote controller is pressed.

• To display memorized error (Protective operation)

1. Turn the unit on.
2. Slide the remote controller cover down to show the

operating buttons.

3. Press the CHECK button on the remote controller for

continuously 5 seconds or more to show “--” on the
display.

4. Press the “TEMP”   or   button on the remote controller

to show “H00” on the display. Signal is transmitted to the
main unit.

5. Press the “TEMP”   or   button (When button is

pressed, the display goes back.) repeatedly and slowly
until Beep sound (about 5 seconds intermittently) is heard
from main unit.

6. Then, displayed error code matches to the error code

saved in unit memory. The power LED on the main unit
also lights up.
Note: When the CHECK button is pressed
continuously for 5 seconds again, or when no
operation continues for 30 seconds, or when the
RESET button on remote controller is pressed with a
pointed object, the display is cancelled.

• To clear memorized error (Protective operation) status

1. Press the AUTO button in main unit continuously for 5

seconds or more and release it. (Test run / Pump down
operation: Beep sound).

2. Press the CHECK button on remote controller for about 1

second to transmit signal to main unit. A beep sound is
heard from main unit and the data is cleared..

• Temporary Operation (Depending on breakdown status)

1. Press the ON/OFF button after selecting Cooling or

Heating operation. (Receiving Beep sound is heard and
the TIMER LED blinks.)

2. The unit can temporarily be used until repaired.

Error Code

Operation

Temporary items

H23

Cooling

Emergency Operation

with limited power

H27, H28

Cooling, Heating

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Note:
“O” - Frequency measured and fan speed fixed.

The memory data of error code is erased when the power supply is cut off, or press the Auto Switch until “beep” sound heard
following by pressing the “RESET” button at remote controller.
Although operation forced to stop when abnormality detected, emergency operation is possible for certain errors (refer to Error
Codes Table) by using remote controller or Auto Switch at indoor unit. However, the remote controller signal receiving sound is
changed from one “beep” to four “beep” sounds.

H11

Indoor / outdoor abnormal
communication

> 1 min after starting
operation

Indoor fan operation
only

• Internal / external cable connections
• Indoor / Outdoor PCB

H14

Indoor intake air temperature sensor
abnormality

—

—

• Intake air temperature sensor 

(detective or disconnected)

H15

Outdoor compressor temperature 
sensor abnormality

Continue for 5 sec.

—

• Compressor temperature sensor 

(detective or disconnected)

H16

Outdoor Current Transformer open
circuit

—

—

• Outdoor PCB
• IPM (Power transistor) module

H19

Indoor fan motor merchanism lock

—

—

• Indoor PCB
• Fan motor

H23

Indoor heat exchanger temperature
sensor abnormality

Continue for 5 sec.

O 

(Cooling only)

• Heat exchanger temperature sensor 

(defective or disconnected)

H26

Ionizer abnormality

—

—

• Indoor PCB
• Ionizer

H27

Outdoor air temperature sensor
abnormality

Continue for 5 sec.

O

• Outdoor temperature sensor

(defective or disconnected)

H28

Outdoor heat exchanger temperature
sensor abnormality

Continue for 5 sec.

O

• Outdoor heat exchanger 

temperature sensor (defective or 
disconnected)

H33

Indoor/Outdoor wrong connection

—

—

• Indoor/Outdoor supply voltage

H97

Outdoor Fan Motor lock abnormality

—

—

• Outdoor PCB
• Outdoor Fan Motor

H98

Indoor high pressure protection

—

—

• Air filter dirty
• Air circulation short circuit

H99

Indoor heat exchanger anti-freezing
protection

—

—

• Insufficient refrigerant
• Air filter dirty

F11

Cooling / Heating cycle changeover
abnormality

4 times occurance
within 30 minutes

—

• 4-way valve
• V-coil

F91

Refrigeration cycle abnormal

2 times occurance
within 20 minutes

—

• No refrigerant 

(3-way valve is closed)

F93

Outdoor compressor abnormal 
revolution

4 times occurance
within 20 minutes

—

• Outdoor compressor

F95

Cool high pressure protection

4 times occurance
within 20 minutes

—

• Outdoor refrigerant circuit

F96

IPM (power transistor) overheating
protection

—

—

• Excess refrigerant
• Improper heat radiation
• IPM (Power transistor)

F97

Outdoor compressor overheating
protection

4 times occurance
within 10 minutes

—

• Insufficient refrigerant
• Compressor

F98

Total running current protection

3 times occurance
within 20 minutes

—

• Excess refrigerant
• Improper heat radiation

F99

Outdoor Direct Current (DC) peak
detection

7 times occurance
continuously

—

• Outdoor PCB
• IPM (Power transistor)
• Compressor

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High voltages are generated in the electrical parts area by the capacitor. Ensure that the capacitor has discharged sufficiently before proceeding
with repair work. Failure to heed this caution may result in electric shocks.

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