CS-XE9EKE, CU-XE9EKE, CS-XE12EKE, CU-XE12EKE - Panasonic Air Conditioner Service Manual (repair manual). Page 47

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47
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
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