CS-XE9EKE, CU-XE9EKE, CS-XE12EKE, CU-XE12EKE - Panasonic Air Conditioner Service Manual (repair manual). Page 41

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13.2.4.
Filter Cleaning Operation Setting
Choose the operation setting by pressing AUTO OFF/ON button.
• If there is no operation, or receives any remote control signal within 5 minutes, the setting mode quits.
13.3. Individual Correspondence Mode
Setting
Operation
1
• Filter cleaning will run automatically after the air conditioner operation stops (air conditioner 
is turned off using remote control).
• After the filter cleaning is completed, the air conditioner operation will remain off.
2**
• Filter cleaning will run automatically before the air conditioner operation starts (air conditioner 
is either turned on using remote control or turned on by the air conditioner timer).
• After the filter cleaning is completed, the air conditioner operation will start automatically.
3**
• Filter cleaning will run automatically before the air conditioner operation starts (air conditioner 
is turned on using remote control).
• After the filter cleaning is completed, the air conditioner operation will start automatically.
4
• Filter cleaning will run automatically after the air conditioner operation stops (air conditioner 
is either turned off using remote control or turned off by the air conditioner timer).
• After the filter cleaning is completed, the air conditioner operation will remain off.
** The setting is valid only if the following conditions are fulfilled:
1. The air conditioner is turned off for at least 3 minutes.
2. The air conditioner has operated continuously for at least 2 hours in previous operation.
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• During Receiving Sound ON/OFF setting mode, press AUTO OFF/ON Button to toggle the Receiving sound.
• During H14 Abnormal Detection Selection Mode, press AUTO OFF/ON Button to toggle the Abnormal detection.
• During Ventilation Quiet mode, press AUTO OFF/ON Button to toggle the Ventilation setting.
• During Auto Filter Cleaning cancellation setting mode, press AUTO OFF/ON Button to toggle the Auto Filter Cleaning cancella-
tion setting.
• If there is no operation, or receives any remote control signal within 5 minutes, the setting mode quits.
13.4. Select Remote Control Transmission Code
• There are 4 type of remote control transmission code could be selected and stored in EEPROM of indoor unit. The indoor unit
will only operate when received signal with same transmission code from remote control. This could prevent signal interference
when there are 2 or more indoor unit installed nearby together.
• To change remote control transmission code, short or open jumpers at the remote control printed circuit board.
• Under various setting mode, after select the transmission code combination of remote control, press any button of remote control
to transmit a signal to indoor unit. The transmission code will be stored in EEPROM.
• After signal is received, the various setting mode is cancelled and return to normal operation.
Remote Control Printed Circuit Board
Transmission Code Combination
J - A
J - B
Remote Control No.
Short
Open
A (Default)
Open
Open
B
Short
Short
C
Open
Short
D
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14 Demo Mode
• The purpose of Demo Mode is to demonstrate the filter cleaning function.
• The Demo Mode can be activated by using AUTO OFF/ON button.
• The Demo Mode is activated by AUTO OFF/ON button. (Beep 
u 4)
• The Demo Mode activation does not start the demonstration.
• The demonstration starts after received remote control ON signal.
• Demo operation:
Zone A
- Normal operation (follow remote control setting) for 2 minutes.
Zone B
a. Filter cleaning operation for 1 round-trip.
b. Then return to normal operation. (Auto Swing operates but Indoor Fan stops)
• After step b. operates for 11 minutes, return to step a.
• During step b. when cleaning button is pressed, return to step a.
• During demonstration, if other remote control button (Except ON/OFF button) is pressed, the demo operation return to (Zone A).
• The demonstration stop after received remote control OFF signal.
• Demo Mode is deactivated by AUTO OFF/ON button. (Beep 
u 3, then long Beep u 1)
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15 Troubleshooting Guide
15.1. Refrigeration Cycle System
In order to diagnose malfunctions, make sure that there are no
electrical problems before inspecting the refrigeration cycle.
Such problems include insufficient insulation, problem with the
power source, malfunction of a compressor and a fan.
The normal outlet air temperature and pressure of the refrigera-
tion cycle depends on various conditions, the standard values
for them are shown in the table to the right.
45
15.2. Relationship Between The Condition of The Air Conditioner and Pres-
sure and Electric Current
• Carry out the measurements of pressure, electric current, and temperature fifteen minutes after an operation is started. 
Cooling Mode
Heating Mode
Condition of the air
conditioner
Low Pressure
High Pressure
Electric current 
during operation
Low Pressure
High Pressure
Electric current 
during operation
Insufficient refrigerant
(gas leakage)
Clogged capillary tube or
Strainer
Short circuit in the indoor unit
Heat radiation deficiency of 
the outdoor unit
Inefficient compression
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15.3. Breakdown Self Diagnosis Function
15.3.1.
Self Diagnosis Function (Three Digits Alphanumeric Code)
• 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) 
status:
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
after repair
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
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15.4. Error Codes Table
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. 
Diagnosis 
display
Abnormality / Protection control
Abnormality
Judgement
Emergency operation
Primary location to verify
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
15.5. Movable Front Panel Malfunction 
• 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.
15.6. Initial Operation After Installation
• 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.
15.7. Error During Filter Cleaning Operation
• 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.
15.8. Error During Ventilation Operation
• 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
16 Disassembly and Assembly Instructions
16.1. Indoor Electronic Controller, Auto Cleaning, Cross Flow Fan and Fan
Motor Removal Procedures
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
50
10. Releasing the CN-FM, CN-FB, CN-CLNSW, CN-TH, CN-SIDESW,
CN-VENT & CN-AUTO. (Fig. 5)
11. Releasing the 2 Terminals (Brown and Black)
.
Fig. 5
12. Releasing the AC02 terminal.
.
Fig. 6
13. Slide out the Indoor Electronic Controller. (Fig. 7)
Fig. 7

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