CS-E9CKP, CU-E9CKP5, CS-E12CKP, CU-E12CKP5 - Panasonic Air Conditioner Service Manual (repair manual). Page 69

H11

Indoor / outdoor abnormal
communication

> 1 min after starting
operation

Indoor fan operation

only

  • Internal / external cable connections
  • Indoor / Outdoor PCB

H14

Indoor intake air temperature sensor
abnormality

—

—

  • Intake air temperature sensor

(defective or disconnected)

H15

Outdoor compressor temperature sensor
abnormality

Continue for 5 sec.

—

  • Compressor temperature sensor

(defective or disconnected)

H16

Outdoor Current Transformer open
circuit

—

—

  • Outdoor PCB
  • IPM (Power transistor) module

H19

Indoor fan motor merchanism lock

—

—

  • 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)

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

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 10 minutes

—

  • Voltage at PFC

F91

Refrigeration cycle abnormality

2 times occurance
within 20 minutes

—

  • No refrigerant

(3-way valve is closed)

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 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
detection

7 times occurance
continuously

—

  • Outdoor PCB
  • IPM (Power transistor)
  • Compressor

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 “RESET” 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.

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