DOWNLOAD Panasonic CS-XE9EKE / CU-XE9EKE / CS-XE12EKE / CU-XE12EKE Service Manual ↓ Size: 7.38 MB | Pages: 79 in PDF or view online for FREE

46

• Once abnormality has occurred during operation, the unit

will stop its operation, and Timer.

• 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, the Timer LED will no

more blink. The last error code (abnormality) will be stored in
IC memory.

• To make a diagnosis

1. Timer LED start to blink and the unit automatically stops

the operation.

2. Press the CHECK button on the remote controller contin-

uously for 5 seconds.

3. “- - ” will be displayed on the remote controller display.

Note: Display only for “- -”. (No transmitting signal, no
receiving sound and no Power LED blinking.)

4. Press the “TEMP” 

 or 

 button on the remote con-

troller. The code “H00” (no abnormality) will be displayed
and signal will be transmitted to the main unit.

5. Every press of the button (up or down) will increase

abnormality numbers and transmit abnormality code sig-
nal to the main unit.

6. When the latest abnormality code on the main unit and

code transmitted from the remote controller are matched,
power LED will light up for 30 seconds and a beep sound
(continuously for 4 seconds) will be heard. If no codes are
matched, power LED will light up for 0.5 seconds and no
sound will be heard.

7. The breakdown diagnosis mode will be canceled unless

pressing the CHECK button continuously for 5 seconds or
operating the unit for 30 seconds. 

8. The LED will be off if the unit is turned off or the 

button on the main unit is pressed.

• To display memorized error (Protective operation) 

1. Turn power on.
2. Press the CHECK button on the remote controller contin-

uously for 5 seconds.

3.   “- - ” will be displayed on the remote controller display.

Note: Display only for “- -”. (No transmitting signal, no
receiving sound and no Power LED blinking.)

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

code “H00” (no abnormality) will be displayed and signal
will be transmitted to the main unit. The power LED lights
up. If no abnormality is stored in the memory, three beeps
sound will be heard.

5. Every press of the button (up or down) will increase

abnormality numbers and transmit abnormality code sig-
nal to the main unit.

6. When the latest abnormality code on the main unit and

code transmitted from the remote controller are matched,
power LED will light up for 30 seconds and a beep sound
(continuously for 4 seconds) will be heard. If no codes are
matched, power LED will light up for 0.5 seconds and no
sound will be heard.

7. The breakdown diagnosis mode will be canceled unless

pressing the CHECK button continuously for 5 seconds or
operating the unit for 30 seconds.

8. The same diagnosis can be repeated by turning power on

again.

• To clear memorized error (Protective operation) status

1. Turn power on.
2. Press the AUTO button for 5 seconds (A beep receiving

sound) on the main unit to operate the unit at Forced
Cooling Operation modes.

3. Press the CHECK button on the remote controller.

• Temporary Operation (Depending on breakdown status)

1. Press the AUTO button (A beep receiving sound) on the

main unit to operate the unit. (Remote control will become
possible.)

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

47

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 follow-
ing by pressing the “CHECK” 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. 

H00

No abnormality detected

—

Normal operation

—

H11

Indoor / Outdoor abnormal communica-
tion

> 1 min after starting 

operation

Indoor fan operation 

only

• Internal / external cable connections
• Indoor / Outdoor PCB

H14

Indoor intake air temperature sensor 
abnormality 

Continue for 5 sec.

—

• Intake air temperature sensor (detec-

tive or disconnected)

H15

Outdoor compressor temperature sensor 
abnormality

Continue for 5 sec.

—

• Compressor temperature sensor 

(detective or disconnected)

H16

Outdoor Current Transformer open cir-
cuit

—

—

• Outdoor PCB
• IPM (Power transistor) module

H19

Indoor fan motor mechanism locked

7 times occurance

continuously

—

• Indoor PCB
• Fan motor

H23

Indoor heat exchanger temperature sen-
sor abnormality

Continue for 5 sec.

O

(Cooling only)

• Heat exchanger temperature sensor 

(detective or disconnected)

H24

Indoor heat exchanger temperature sen-
sor 2 abnormality 

Continue for 5 sec.

—

• Heat exchanger temperature sensor 2

(detective or disconnected)

H27

Outdoor intake air temperature sensor 
abnormality

Continue for 5 sec.

O

• Outdoor temperature sensor (detec-

tive or disconnected)

H28

Outdoor heat exchanger temperature 
sensor abnormality

Continue for 5 sec.

O

• Outdoor heat exchanger temperature 

sensor (detective or disconnected)

H30

Outdoor discharge air temperature sen-
sor abnormality

Continue for 5 sec.

—

• Outdoor temperature sensor (detec-

tive or disconnected)

H33

Indoor / Outdoor wrong connection

—

—

• Indoor / Outdoor supply voltage

H38

Indoor / Outdoor mismatch (brand code)

—

—

—

H50

Ventilation motor abnormality

7 times occurance

continuously

—

• Indoor PCB
• Ventilation motor

H51

Nozzle lock abnormality

2 times occurance

continuously

—

• Nozzle

H52

Limit switch abnormality

—

—

• Indoor PCB

H97

Outdoor fan motor mechanism locked

2 times occurance 

within 30 minutes

—

• Outdoor PCB
• Fan motor

H98

Indoor high pressure protection

—

—

• Air filter dirty
• Air circulation short circuit

H99

Indoor heat exchanger anti-freezing pro-
tection

—

—

• 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 10 minutes

—

• Voltage at PFC

F91

Refrigerantion cycle abnormality

2 times occurance 

within 20 minutes

—

• No refrigerant

(3-way valve is closed)

F93

Compressor rotation failure

4 times occurance 

within 20 minutes

—

• Compressor

F95

Cool high pressure protection

4 times occurance 

within 20 minutes

—

• Outdoor refrigerant circuit

F96

IPM (power transistor) overheating pro-
tection

4 times occurance 

within 30 minutes

—

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

F97

Outdoor compressor overheating protec-
tion

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 detec-
tion

7 times occurance

continuously

—

• Outdoor PCB
• IPM (Power transistor)
• Compressor

48

• Movable front panel does not opens/fully opens during air conditioner operation.
• This happen when the front panel has been interrupted during operations.
• Follow below instructions to reset the air conditioner memory.

1. Press OFF/ON button to stop the air conditioner operation.
2. Then use a sharp end object to press the RESET button.

• When the first air conditioner operation is initialized, filter cleaning will run one cycle automatically.

- This is a normal operation to make sure the filter cleaning device is able to move smoothly.
- Filter cleaning will not be terminated by pressing any of the remote control buttons. Filter cleaning will stop by itself after oper-

ates for one cycle.

• Filter cleaning indicator is blinking at every half a second interval.

- The filter cleaning device is jammed because the filter is not installed correctly.
- The filter cleaning device is malfunction.

• Filter cleaning indicator is blinking at every 2 seconds interval.

- The filter cleaning device is malfunction.
- Printed circuit board is malfunction.

• The filter cleaning device stops half way in the middle of the main unit.

- To return the filter cleaning device to the original position, press CLEANING button at the remote control and hold for more

than 5 seconds.

- To change the filter cleaning device from right side (original position) to left side, press CLEANING button at the remote con-

trol and hold for more than 5 seconds, then press Timer increment button at remote control.

• Ventilation indicator is blinking at every half a second interval.

- Ventilation fan motor may be locked due to piles of dust accumulated in the ventilation area and fails to discharge.
- Printed circuit board is malfunction.
- Ventilation fan motor is malfunction.

49

1. Open and release the Intake Grille complete (Front). (Fig. 1)

Fig. 1

2. Remove the Intake Grille Complete (Top). (Fig. 2)
3. Remove the Front Grille Complete (Right) by releasing the 2 screws.
(Fig. 2)
4. Remove the Front Grille Complete (Left) by releasing the 2 screws.
(Fig. 2)
5. Remove the 2 Plate Cover. (Fig. 2)

Fig. 2

6. Remove the Control Board Cover. (Fig. 3)

Fig. 3

7. Remove the Particular Piece by screw. (Fig. 4)
8. Remove the Earth Wire screws. (Fig. 4)
9. Releasing CN-STM4, CN-STM2, CN-STM1, CN-ACLN, CN-STM3,
CN-SW & CN-DISP (Fig. 4)

Fig. 4