Panasonic CS-XE9EKE / CU-XE9EKE / CS-XE12EKE / CU-XE12EKE Service Manual ▷ View online
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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
46
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.
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.
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.)
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.
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.
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.
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.
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-
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.)
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.
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.
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.
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.
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
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.
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.)
possible.)
2. The unit can temporarily be used until repaired.
Error Code
Operation
Temporary items
H23
Cooling
Emergency Operation
with limited power
with limited power
H27, H28
Cooling, Heating
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15.4. Error Codes Table
Note:
“O” - Frequency measured and fan speed fixed.
“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
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
tion
> 1 min after starting
operation
Indoor fan operation
only
• Internal / external cable connections
• Indoor / Outdoor PCB
• Indoor / Outdoor PCB
H14
Indoor intake air temperature sensor
abnormality
abnormality
Continue for 5 sec.
—
• Intake air temperature sensor (detec-
tive or disconnected)
H15
Outdoor compressor temperature sensor
abnormality
abnormality
Continue for 5 sec.
—
• Compressor temperature sensor
(detective or disconnected)
H16
Outdoor Current Transformer open cir-
cuit
cuit
—
—
• Outdoor PCB
• IPM (Power transistor) module
• IPM (Power transistor) module
H19
Indoor fan motor mechanism locked
7 times occurance
continuously
—
• Indoor PCB
• Fan motor
• Fan motor
H23
Indoor heat exchanger temperature sen-
sor abnormality
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
sor 2 abnormality
Continue for 5 sec.
—
• Heat exchanger temperature sensor 2
(detective or disconnected)
H27
Outdoor intake air temperature sensor
abnormality
abnormality
Continue for 5 sec.
O
• Outdoor temperature sensor (detec-
tive or disconnected)
H28
Outdoor heat exchanger temperature
sensor abnormality
sensor abnormality
Continue for 5 sec.
O
• Outdoor heat exchanger temperature
sensor (detective or disconnected)
H30
Outdoor discharge air temperature sen-
sor abnormality
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
• 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
• Fan motor
H98
Indoor high pressure protection
—
—
• Air filter dirty
• Air circulation short circuit
• Air circulation short circuit
H99
Indoor heat exchanger anti-freezing pro-
tection
tection
—
—
• Insufficient refrigerant
• Air filter dirty
• Air filter dirty
F11
Cooling / Heating cycle changeover
abnormality
abnormality
4 times occurance
within 30 minutes
—
• 4-way valve
• V-coil
• 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
tection
4 times occurance
within 30 minutes
—
• Excess refrigerant
• Improper heat radiation
• IPM (Power transistor)
• Improper heat radiation
• IPM (Power transistor)
F97
Outdoor compressor overheating protec-
tion
tion
4 times occurance
within 10 minutes
—
• Insufficient refrigerant
• Compressor
• Compressor
F98
Total running current protection
3 times occurance
within 20 minutes
—
• Excess refrigerant
• Improper heat radiation
• Improper heat radiation
F99
Outdoor Direct Current (DC) peak detec-
tion
tion
7 times occurance
continuously
—
• Outdoor PCB
• IPM (Power transistor)
• Compressor
• IPM (Power transistor)
• Compressor
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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.
• 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.
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-
- 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.
- 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.
- 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.
- Printed circuit board is malfunction.
- Ventilation fan motor is malfunction.
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