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49

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 “CHECK” button at Remote Control.
Although operation forced to stop when abnormality detected, emergency operation is possible for certain errors (refer to Error
Codes Table) by using Remote Control or Auto Switch at indoor unit. However, the Remote Control signal receiving sound is
changed from one “beep” to four “beep” sounds.

H00

No abnormality detected

—

Normal operation

H11

Indoor / outdoor abnormal
communication

> 1 min after starting
operation

Indoor fan operation
only

• Internal / external cable connections
• Indoor / Outdoor PCB

H12

Connection capability rank abnormal

—

—

—

H14

Indoor intake air temperature sensor
abnormality

Continue for 5 sec.

—

• 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

7 times occurance 
continuously.

—

• 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)

H25

E-Ion breakdown

—

—

• Indoor PCB
• E-Ion PCB

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

H38

Indoor/outdoor mismatch (brand code)

—

—

—

H58

Abnormal gas sensor

Continue for 6 hours

—

• Gas sensor

(defective or disconnected)

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

F90

PFC control

4 times occurance
within 20 minutes

—

• Voltage at PFC

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 20 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

50

• Lift to open the vertical vent gently. Remove the 2 caps and

2 screws at the bottom of discharge vent. (Fig. 1)

• Remove the Front Grille by releasing the 3 hooks at the top

of the Front Grille. Hold both sides of the Front Grille and
remove it by pulling up and towards you gently. (Fig. 1)

Fig. 1

• Unhook the tabs at the Control Board to remove the Control

Board Cover. (Fig. 2)

• Release the Indicator by detaching the CN-DISP and

CN-LED, then remove the Indicator from the 2 tabs. (Fig. 3)

Fig. 2

Fig. 3

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.

51

• Press the Hold to the right side, remove the Particular Piece

and slide out the Main Electronic Controller (Fig. 4).

• Release the CN-DATA1. (Fig. 5)
• Release the CN-CLN. (Fig.5)
• Release the CN-FB (for S12GK only). (Fig.5)
• Release the CN-TH. (Fig.5)
• Release the CN-STM1. (Fig.5)

Fig. 4

Fig. 5

• Release the screw for the Earth wire. (Fig. 6)
• Pull out 2 terminal wires (Black and Red) from the Terminal

Board. (Fig. 6)

• Detach the Terminal Board from the Control Board. (Fig. 6)
• Press the Hold to the left side, remove the Particular Piece

and slide out the Power Electronic Controller. (Fig. 6)

• Release the AC-301 (BRW) connector. (Fig. 7)
• Release the AC-303 (WHT) connector. (Fig. 7)
• Release the CN-PCFM connector. (Fig. 7)

Fig. 6

Fig. 7

52

• Pull out the Drain Hose (behind the Discharge Grille) from

outlet to remove the Discharge Grille. (Fig. 8)

Fig. 8

• Release the 3 screws. (Fig. 9)
• By pressing down the hook at the left side of Control Board,

you will be able to remove the Control Board. (Fig. 9)

Fig. 9

• Remove the screw at the Cross Flow Fan. (Fig 10)

Reminder:- To reinstall the Fan Motor, please adjust the
connector location to 45° with Fan Motor before fixing
Control Board. (Fig. 10)

• Remove the Bearing. (Fig. 11)
• Remove the screw at the left of the Evaporator. (Fig. 11)
• Press the Hold to the left side then you can release the

Evaporator. (Fig. 11)

Fig. 10

Fig. 11