Panasonic air conditioner error codes

The self-diagnostics system of the air conditioners by Panasonic displays error codes on the display of the infrared remote control and on the wall-mounted remote control. The list of error codes, their interpretation, and the troubleshooting methods for each error code are specified.

Panasonic inverter air conditioner error codes

CodesProblemSolution
S01Room temperature sensor failureRefer to detailed diagnostic
S02Indoor coil sensor failureCheck sensor for continuity
S03Humidity sensor failureReplace indoor board
S04Comp. temperature sensor failureCheck sensor for continuity
S05Outdoor coil sensor failure
S06Outdoor air sensor failure
S07Outdoor current sensor failureReplace outdoor board
E01Indoor/outdoor communication failureRefer to detailed diagnostics
E02HIC circuit failure (Compressor/Fan circuit)
E03Outdoor unit OTP rom failure
E04Peak current cut off
E05PAM or Active circuit failure
E06High compressor discharge temperature
E07Indoor fan operating failure
E084 way valve switching failure (RV)
E09No refrigerant protection
E10DC compressor drive circuit failure
E11Outdoor fan operating failure
E12Error in outdoor unit
E13Freeze prevention activated


Diagnosis displayAbnormality / Protection control Abnormality JudgementEmergency operation Primary location to verify
H00No abnormality detected-Normal operation-
H11Indoor / Outdoor abnormal communication> 1 min after starting operationIndoor fan operation only• Internal / external cable connections
• Indoor / Outdoor PCB
H12Connection capability rank abnormal---
H14Indoor intake air temperature sensor abnormalityContinue for 5 sec.-• Intake air temperature sensor (detective or disconnected)
H15Outdoor compressor temperature sensor abnormalityContinue for 5 sec-Compressor temperature sensor (detective or disconnected)
H16Outdoor Current Transformer open circuit--• Outdoor PCB
• IPM (Power transistor) module
H19Indoor fan motor mechanism locked7 times occurance continuously-• Indoor PCB
• Fan motor
H23Indoor heat exchanger temperature sensor abnormality-O (Cooling only)• Heat exchanger temperature sensor (detective or disconnected)
H24Indoor heat exchanger temperature sensor 2 abnormalityContinue for 5 sec.-• Heat exchanger temperature sensor (detective or disconnected)
H27Outdoor intake air temperature sensor abnormalityContinue for 5 sec.O• Outdoor temperature sensor (detective or disconnected)
H28Outdoor heat exchanger temperature sensor abnormalityContinue for 5 sec.O• Outdoor heat exchanger temperature sensor (detective or disconnected)
H30Outdoor discharge air temperature sensor abnormalityContinue for 5 sec.-• Outdoor temperature sensor (detective or disconnected)
H33Indoor / Outdoor wrong connection--• Indoor / Outdoor supply voltage
H38Indoor / Outdoor mismatch (brand code)---
H50Ventilation motor abnormality7 times occurance continuously-• Indoor PCB • Ventilation motor
H51Nozzle lock abnormality2 times occurance continuously-•Nozzle
H52Limit switch abnormality--• Indoor PCB
H97Outdoor fan motor mechanism locked2 times occurance within 30 minutes-• Indoor PCB • Fan motor
H98Indoor high pressure protection--• Air filter dirty • Air circulation short circuit
H99Indoor heat exchanger anti-freezing protection--• Insufficient refrigerant
• Air filter dirty
F11Cooling / Heating cycle changeover abnormality4 times occurance within 30 minutes-•4-way valve
• V-coil
F90PFC control4 times occurance within 10 minutes-• Voltage at PFC
F91Refrigerantion cycle abnormality2 times occurance within 20 minutes-• No refrigerant (3-way valve is closed)
F93Compressor rotation failure4 times occurance within 20 minutes-• Compressor
F95Cool high pressure protection4 times occurance within 20 minutes-• Outdoor refrigerant circuit
F96IPM (power transistor) overheating protection4 times occurance within 30 minutes-• Excess refrigerant
• Improper heat radiation
• IPM (Power transistor)
F97Outdoor compressor overheating protection4 times occurance within 10 minutes-• Insufficient refrigerant
• Compressor
F98Total running current protection3 times occurance within 20 minutes-• Excess refrigerant
• Improper heat radiation
F99Outdoor Direct Current (DC) peak detection7 times occurance continuously-• Outdoor PCB
• IPM (Power transistor)
• Compressor

Panasonic Cassette Air  air conditioner error codes

Alarm CodeAlarm Meaning
E01Remote Controller Reception Error
E02Remote Controller Transmission Error
E03Error in Indoor Unit Receiving Signal from Remote Controller (central)
E04Error in Indoor Unit Receiving Signal from the Outdoor unit
E05Error in Indoor Unit Transmitting Signal to the Outdoor Unit
E06Outdoor Unit Failed to Receive Serial Communication Signals from Indoor Unit
E07Outdoor Unit Sending Failure to Indoor Unit
E08Duplicate Indoor Unit Address Settings Error
E09More Than One Remote Controller Set to Main Error
E12Automatic Address Setting Start is Prohibited while Auto-address Setting in Progress.
E13Error in Indoor Unit Transmitting Signal to Remote Controller
E14Main Unit duplication in Simultaneous-operation Multi Control (detected outdoor unit)
E15Automatic Address Alarm (capacity too low)
E16Automatic Address Alarm (capacity too high)
E18Faulty Communication in Group Control Wiring
E20No Indoor Units Connected

Panasonic CS-E7PKR  air conditioner error codes

Diagnosis displayAbnormality / Protection controlAbnormality JudgementProblemCheck location
H00No memory of failure
H11Indoor/outdoor abnormal communicationAfter operation for 1 minuteIndoor/outdoor communication not establish• Indoor/outdoor wire terminal
• Indoor/outdoor PCB
• Indoor/outdoor connection wire

H12Indoor unit capacity unmatched90s after power supplyTotal indoor capability more than maximum limit or less than minimum limit, or number of indoor unit less than two.• Indoor/outdoor connection wire
• Indoor/outdoor PCB
• Specification and combination table in catalogue
H14Indoor intake air temperature sensor abnormalityContinuous for 5sIndoor intake air temperature sensor open or short circuit• Indoor intake air temperature sensor lead wire and connector
H15Compressor temperature sensor abnormalityContinuous for 5sCompressor temperature sensor open or short circuit• Compressor temperature sensor lead wire and connector
H16Outdoor current transformer (CT) abnormalityCurrent transformer faulty or compressor faulty• Outdoor PCB faulty or compressor faulty
H23Indoor heat exchanger temperature sensor abnormalityContinuous for 5sIndoor heat exchanger temperature sensor open or short circuit• Indoor heat exchanger temperature sensor lead wire and connector
H25Indoor E-Ion abnormalityPort is ON for 10s during E-Ion off• E-Ion PCB
H27Outdoor air temperature sensor abnormalityContinuous for 5sOutdoor air temperature sensor open or short circuit• Outdoor air temperature sensor lead wire and connector
H28Outdoor heat exchanger temperature sensor 1 abnormalityContinuous for 5sOutdoor heat exchanger temperature sensor 1 open or short circuit• Outdoor heat exchanger temperature sensor 1 lead wire and connector
H30Outdoor discharge pipe temperature sensor abnormalityContinuous for 5sOutdoor discharge pipe temperature sensor open or short circuit• Outdoor discharge pipe temperature sensor lead wire and connector
H32Outdoor heat exchanger temperature sensor 2 abnormalityContinuous for 5sOutdoor heat exchanger temperature sensor 2 open or short circuit• Outdoor heat exchanger temperature sensor 2 lead wire and connector
H33Indoor / outdoor misconnection abnormality
Indoor and outdoor rated voltage different• Indoor and outdoor units check
H34Outdoor heat sink temperature sensor abnormalityContinuous for 2sOutdoor heat sink temperature sensor open or short circuit• Outdoor heat sink sensor
H36Outdoor gas pipe temperature sensor abnormalityContinuous for 5sOutdoor gas pipe temperature sensor open or short circuit• Outdoor gas pipe temperature sensor lead wire and connector
H37Outdoor liquid pipe temperature sensor abnormalityContinuous for 5sOutdoor liquid pipe temperature sensor open or short circuit• Outdoor liquid pipe temperature sensor lead wire and connector
H38Indoor/Outdoor mismatch (brand code)Brand code not match• Check indoor unit and outdoor unit.
H39Abnormal indoor operating unit or standby units3 times happen within 40 minutesWrong wiring and connecting pipe, expansion valve abnormality, indoor heat exchanger sensor open circuit• Check indoor/outdoor connection wire and connection pipe
• Indoor heat exchanger sensor lead wire and connector
• Expansion valve and lead wire and connector
H41Abnormal wiring or piping connectionWrong wiring and connecting pipe, expansion valve abnormality• Check indoor/outdoor connection wire and connection pipe
• Expansion valve and lead wire and connector.
H58Indoor gas sensor abnormalityContinuous for 6 hoursIndoor gas sensor open or short circuit• Indoor gas sensor
• Indoor PCB
H59ECO patrol sensor abnormalityContinuous for 70sECO patrol sensor open or short circuit• ECO patrol sensor
• ECO patrol and Indoor PCB
H64Outdoor high pressure sensor abnormalityContinuous for 1 minutesHigh pressure sensor open circuit during compressor stop• High pressure sensor
• Lead wire and connector
H70Light sensor abnormalityContinuous for 24 hours, 15 daysLight sensor open or short circuit• Light sensor (defective or disconnected)
H97Outdoor fan motor mechanism lock2 times happen within 30 minutesOutdoor fan motor lock or feedback abnormal• Outdoor fan motor lead wire and connector
• Fan motor lock or block
F114-way valve switching abnormality4 times happen within 30 minutes4-way valve switching abnormal• 4-way valve
• Lead wire and connector.
F17Indoor standby units freezing abnormality3 times happen within 40 minutesWrong wiring and connecting pipe, expansion valve leakage, indoor heat exchanger sensor open circuit• Check indoor/outdoor connection wire and pipe
• Indoor heat exchanger sensor lead wire and connector
• Expansion valve lead wire and connector.
F90Power factor correction (PFC) circuit protection4 times happen within 10 minutesPower factor correction circuit abnormal• Outdoor PCB faulty
F91Refrigeration cycle abnormality2 times happen within 20 minutesRefrigeration cycle abnormal• Insufficient refrigerant or valve close
F93Compressor abnormal revolution4 times happen within 20 minutesCompressor abnormal revolution• Power transistor module faulty or compressor lock
F94Compressor discharge pressure overshoot protection4 times happen within 30 minutesCompressor discharge pressure overshoot• Check refrigeration system
• Outdoor air circuit
F96Power transistor module overheating protection4 times happen within 30 minutesPower transistor module overheat• PCB faulty
• Outdoor air circuit (fan motor)
F97Compressor overheating protection3 times happen within 30 minutesCompressor overheat• Insufficient refrigerant
F98Total running current protection3 times happen within 20 minutesTotal current protection• Check refrigeration system
• Power source or compressor lock
F99Outdoor direct current (DC) peak detectionContinuous happen for 7 timesPower transistor module current protection• Power transistor module faulty or compressor lock

Panasonic CS-F14DD3E5  air conditioner error codes

Wired remote control unit display Location of problemCheck location
F15Drain level Float switch problemDrain pump and drain pipe, indoor unit connectors
F16Louver switch problemLouver motor, decorative panel connection terminal, or indoor unit louver motor connectors
F17D. C Fan Motor problemIndoor unit D.C. Fan motor or connection terminals
F20Indoor temperature sensor problemIndoor temperature sensor lead wire or indoor unit connector
Remote control thermistor problemRemote control thermistor
F21Pipe temp, sensor problem (indoor unit)Pipe temperature sensor lead wire or indoor unit connector
F26Remote control transmission problemRemote control unit cable and connection terminals
F27Indoor/outdoor unit disconnection problemIndoor/outdoor unit connection cable and connection terminals, or indoor unit power supplies (indoor side)
Indoor/outdoor unit connection wire (indoor side)
Indoor/outdoor unit disconnection problemIndoor/outdoor unit connection cable and connection terminals, or outdoor unit power supplies (outdoor side)
Indoor/outdoor unit connection problemIndoor/outdoor unit connection wire (outdoor side)
F30System problemTotal capacity for the number of indoor units is insufficient, or over. Check the total capacity and the number of indoor units
Open phase, or reversed phase of supplyCheck the main power supply terminal board connections, or switch over any two of the power supply wires.
F31Suction pressure protectionInsufficient refrigerant or valve operatioin (closed)
High-pressure cut-offCheck the Refrigeration system
4 way valve informationCheck the 4 way valve or lead wire
Refrigerant system problemValve operation (closed) or refrigerant system
F32Compressor overcurrent protectionOpen phase or lock in compressor
Compressor discharge temp, protectionInsufficient refrigerant
F40Heat exchanger outlet temperature sensor problemOutdoor heat exchanger outlet temperature sensor (COND TEMP) lead wire, connector
Compressor discharge temperature sensor problemCompressor discharge temperature sensor (DIS T. TEMP) lead wire, connector
F41High pressure switch open circuit problemHigh-pressure switch lead wire, connector
Low pressure sensor problemLow pressure sensor lead wire, connector or valve operation (closed)
F42Current detector open circuitOutdoor unit current detector fault or connector compressor fault or refrigerant system

Panasonic CS-RZ35TKR Air Conditioner Error Codes

Error code Malfunction Decision ConditionsMalfunction Caused
H11 (Indoor/Outdoor Abnormal Communication)During startup and operation of cooling and heating, the data received from outdoor unit in indoor unit signal transmission is checked whether it is normal• Faulty indoor unit PCB.
• Faulty outdoor unit PCB.
• Indoor unit-outdoor unit signal transmission error due to wrong wiring.
• Indoor unit-outdoor unit signal transmission error due to breaking of wire in the connection wires between the indoor and outdoor units.
• Indoor unit-outdoor unit signal transmission error due to disturbed power supply waveform
H14 (Indoor Intake Air Temperature Sensor Abnormality)During startup and operation of cooling and heating, the temperatures detected by the indoor intake air temperature sensor are used to determine sensor errors• Faulty connector connection.
• Faulty sensor.
• Faulty PCB
H15 (Compressor Temperature Sensor Abnormality)During startup and operation of cooling and heating, the temperatures detected by the outdoor compressor temperature sensor are used to determine sensor errors• Faulty connector connection.
• Faulty sensor.
• Faulty PCB
H16 (Outdoor Current Transformer Open Circuit)A current transformer (CT) is detected by checking the compressor running frequency (£ rated frequency) and CT detected input current (less than 0.65A) for continuously 20 seconds• CT defective
• Outdoor PCB defective
• Compressor defective (low compression)
H19 (Indoor Fan Motor - DC Motor Mechanism Locked)The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor (feedback of rotation > 2550rpm or < 50rpm)• Operation stops due to breaking of wire inside the fan motor.
• Operation stops due to breaking of fan motor lead wires.
• Operation stops due to Hall IC malfunction.
• Operation error due to faulty indoor unit PCB
H23 (Indoor Pipe Temperature Sensor 1 Abnormality)During startup and operation of cooling and heating, the temperatures detected by the indoor heat exchanger temperature sensor 1 are used to determine sensor errors• Faulty connector connection.
• Faulty sensor.
• Faulty PCB
H24 (Indoor Pipe Temperature Sensor 2 Abnormality)During startup and operation of cooling and heating, the temperatures detected by the indoor heat exchanger temperature sensor 2 are used to determine sensor errors• Faulty connector connection.
• Faulty sensor.
• Faulty PCB
H25 (e-ion Air Purifying System Abnormal)During standby of cooling and heating operation, e-ion breakdown occurs and air conditioner stops operation• Faulty indoor main PCB.
• Faulty indoor e-ion power module
H27 (Outdoor Air Temperature Sensor Abnormality)During startup and operation of cooling and heating, the temperatures detected by the outdoor air temperature sensor are used to determine sensor errors• Faulty connector connection.
• Faulty sensor.
• Faulty PCB
H28 (Outdoor Pipe Temperature Sensor Abnormality)During startup and operation of cooling and heating, the temperatures detected by the outdoor pipe temperature sensor are used to determine sensor errors• Faulty connector connection.
• Faulty sensor.
• Faulty PCB
H30 (Compressor Discharge Temperature Sensor Abnormality)During startup and operation of cooling and heating, the temperatures detected by the outdoor discharge pipe temperature sensor are used to determine sensor errors• Faulty connector connection.
• Faulty sensor.
• Faulty PCB
H58 (Patrol Sensor Abnormality)• If Patrol sensor feedback is OV or 5V continuous for 6 hours.• Faulty connector connection.
• Error will display only when the Patrol operation is ON• Faulty Patrol sensor
H97 (Outdoor Fan Motor - DC Motor Mechanism Locked)The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor• Operation stops due to breaking of wire inside the fan motor.
• Operation stops due to breaking of fan motor lead wires.
• Operation stops due to Hall IC malfunction.
• Operation error due to faulty outdoor unit PCB

Panasonic S-22MY2E5 (CZ-KPY3) Series Air Conditioner Error Codes

Error code Malfunction Decision ConditionsMalfunction Caused
F11 (4-way valve Abnormality)• When heating operation, when indoor pipe temperature is below 10°C• Connector in poor contact
• When cooling operation, when indoor pipe temperature is above 45°C• Faulty sensor
• Faulty outdoor unit PCB
• 4-way valve defective
F90 (Power Factor Correction Protection)During startup and operation of cooling and heating, when Power Factor Correction (PFC) protection circu main PCB senses abnormal high DC voltage level• DC voltage peak due to power supply surge.
• DC voltage peak due to compressor windings not uniform.
• Faulty outdoor PCB
F91 (Refrigeration Cycle Abnormality)• During cooling, compressor frequency = Fcmax.- Gas shortage detection 1: A gas shortage is detected by checking the CT-detected input current val running frequency. During startup and operating of cooling and heating, input current < 8.78/25( running frequency + 0.25.
• During heating, compressor frequency > Fhrated.- Gas shortage detection 2: A gas shortage is detected by checking the difference between indoor indoor intake air temperature during cooling and heating.
• During cooling and heating operation, running current: 0.65A < I < 1.65A.Malfunction Caused
• During cooling, indoor intake - indoor pipe < 4°C• Refrigerant shortage (refrigerant leakage)
• During heating, indoor pipe - indoor intake < 5°C• Poor compression performance of compressor.
• 2/3 way valve closed.
• Detection error due to faulty indoor intake air or indoor pipe temperature sensors
F93 (Compressor Rotation Failure)A compressor rotation failure is detected by checking the compressor running condition through the position detection circuit• Compressor terminal disconnect
• Outdoor PCB malfunction
F95 (Cooling High Pressure Abnormality)During operation of cooling, when outdoor unit heat exchanger high temperature data (61 °C) is detected by the outdoor pipe temperature sensor• Outdoor pipe temperature rise due to short circuit of hot discharge air flow.
• Outdoor pipe temperature rise due to defective of outdoor fan motor.
• Outdoor pipe temperature rise due to defective outdoor pipe temperature sensor.
• Outdoor pipe temperature rise due to defective outdoor unit PCB
F96 (IPM Overheating)During operating of cooling and heating, when IPM temperature data (100°C) is detected by the IPM temperature sensor.• IPM overheats due to short circuit of hot discharge air flow.
• IPM overheats due to defective of outdoor fan motor.
• IPM overheats due to defective of internal circuitry of IPM.
• IPM overheats due to defective IPM temperature sensor.
Multi Models OnlyMulti Models Only
• Compressor Overheating: During operation of cooling and heating, when the compressor OL is activated.- Compressor OL connector poor contact.
• Heat Sink Overheating: During operation of cooling and heating, when heat sink temperature data (90°C) is detected by the heat sink temperature sensor- Compressor OL faulty
F97 (Compressor Overheating)During operation of cooling and heating, when compressor tank temperature data (112°C) is detected by the compressor tank temperature sensor• Refrigerant shortage (refrigerant leakage).
• 2/3 way valve closed.
• Detection error due to faulty compressor tank temperature sensor
F98 (Input Over Current Detection)During operation of cooling and heating, when an input over-current (14.98A) is detected by checking the input current value being detected by current transformer (CT) with the compressor running• Over-current due to compressor failure.
• Over-current due to defective outdoor unit PCB.
• Over-current due to defective inverter main circuit electrolytic capacitor.
• Over-current due to excessive refrigerant