Panasonic AC Error Codes – Most Common Error Messages

Panasonic is considered a top manufacturer and distributor all around the world. Offering customers everything from air conditioners, entertainment systems, refrigerators, TVs and so much more for home and commercial use. Founded more than 105 years ago, Panasonic is a Japanese multinational corporation that started its operations by producing light bulb sockets. It’s easy to assume that the company has come a long way and made its place as one of the largest companies in the world.

Along with that, the company offers a wide range of top-of-the-line choices that are designed to fit your residential and commercial space. Offering you the ease of mind you need to focus on your work rather than worry about the basic workings of your home.

Regardless of how high a company is ranked, or how well the appliance is reviewed, you are at the risk of an error. An error is not here to tell you it’s time to switch out your appliance, it’s a direct signal from the device – one that tells the owner something is wrong with the system that needs to be fixed. So rather than ignoring the error codes, your appliance is showing its time to note down the Panasonic air conditioner error code and get to the bottom of the problem. To help you out we have listed down the most common error codes of Panasonic air conditioners

Inverter Split Type Codes

Error CodesCause
S01Room temperature sensor failure
S02Indoor coil sensor failure
S03Humidity sensor failure
S04Comp. temperature sensor failure
S05Outdoor coil sensor failure
S06Outdoor air sensor failure
S07Outdoor current sensor failure
E01Indoor/outdoor communication failure
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
E08Way valve switching failure (RV)
E09No refrigerant protection
E10DC compressor drive circuit failure
E11Outdoor fan operating failure
E12Error in outdoor unit
E13Freeze prevention activated

Remote Control Display Meaning

Panasonic AC Remote Control
Panasonic AC Remote Control

Multi AC Codes

Panasonic Multi AC Error Codes
Panasonic Multi AC Error Codes
Error CodesProblem
H00No abnormality detected
H11Indoor-outdoor abnormal communication
H14Indoor intake air temperature sensor abnormality
H15Outdoor compressor temperature sensor abnormality
H16Outdoor Current Transformer open circuit
H19Indoor fan motor merchanism lock
H23Indoor heat exchanger temperature sensor abnormality
H24Indoor heat exchanger temperature sensor 2 abnormality
H27Outdoor air temperature sensor abnormality
H28Outdoor heat exchanger temperature sensor abnormality
H30Outdoor discharge air temperature sensor abnormality
H33Indoor/Outdoor wrong connection
H38Indoor/outdoor mismatch (brand code)
H97Outdoor fan motor mechanism locked
H98Indoor high pressure protection
H99Indoor heat exchanger anti-freezing protection
F11Cooling/Heating cycle changeover abnormality
F90PFC control
F91Refrigeration cycle abnormal
F93Outdoor compressor abnormal revolution
F95Cool high pressure protection
F96IPM (power transistor) overheating protection
F97Outdoor compressor overheating protection
F98Total running current protection
F99Outdoor Direct Current (DC) peak detection

Cassette AC Codes

If the problem persists even after you check the foregoing items, stop the unit, disconnect the power to the indoor unit and contact the dealer where the product was purchased with the model number and problem you are having.

Panasonic Cassette AC Error Codes
Panasonic Cassette AC Error Codes
Error CodesProblem
E06Outdoor unit failed to receive serial communication signals from indoor unit
E07Outdoor unit sending failure to indoor unit
E12Automatic address setting start is prohibited while auto-address setting in progress.
E14Main unit duplication in simultaneous-operation multi control (detected outdoor unit)
E15Automatic address alarm (capacity too low)
E16Automatic address alarm (capacity too high)
E20No indoor units connected
F04Compressor discharge temperature sensor (TD) trouble
F06Inlet temperature sensor (C1) in heat exchanger trouble
F07Intermediate temperature (C2) in heat exchanger trouble
F08Outdoor air temperature sensor (TO) trouble
F12Compressor inlet suction temperature sensor (TS) trouble
F31Outdoor unit nonvolatile memory (EEPROM) trouble
H01Primary (input) overcurrent detected
H02PAM trouble
H03Primary current CT sensor (current sensor) failure
H05Sensor failure, Compressor discharge temperature sensor (TD) disconnected
H31HIC trouble
L04Outdoor unit address duplication
L10Outdoor unit capacity not set
L13Indoor unit type setting error
L184-way valve operation failure
P03Compressor discharge temperature trouble
P04High pressure trouble
P05AC power supply trouble
P13Alarm valve open
P14O2 sensor detect
P15Insufficient gas level detected
P16Compressor overcurrent trouble
P22Outdoor unit fan motor trouble
P29Lack of INV compressor wiring, INV compressor actuation failure (including locked) due to DCCT failure

VRF AC Codes

Panasonic VRF AC Error Codes and Troubleshooting
Panasonic VRF AC Error Codes and Troubleshooting

Indoor unit is detecting error signal from remote controller (and system controller).

Error CodesMeaning
E01Error in receiving serial communication signal.
E02Error in transmitting serial communication signal.
E03Indoor unit is detecting error signal from remote controller.
E04Error in receiving serial communication signal. When turning on the power supply, the number of connected indoor units does not correspond to the number set.
E06Error of the outdoor unit in receiving serial communication signal from the indoor unit.
E08Indoor unit address setting is duplicated.
E09Remote controller address connector.
E12Starting auto address setting is prohibited. This alarm message shows that the auto address connector CN-A.ADD is shorted while other RC line is executing auto address operation.
E15Error in auto address setting.
E16Error in auto address setting.
E20No indoor unit is connected during auto address setting.
E24Main outdoor unit is detecting error signal from sub outdoor unit.
E25Error of outdoor unit address setting.
E26The number of connected main and sub outdoor units do not correspond to the number set at main outdoor unit PCB.
E29Error of sub outdoor unit in receiving serial communication signal from main outdoor unit.
E30Transmission from outdoor unit faulty.
E18Error of main indoor unit in receiving serial communication signal from sub indoor units.
L02This alarm message shows when the indoor unit for multiple-use is not connected to the outdoor unit.
L03Duplication of main indoor unit address setting in group control.
L04Duplication of outdoor R.C. address setting.
L05Priority set remote controller.
L06Non-priority set remote controller.
L07Group control wiring is connected to individual control indoor unit.
L08Indoor unit address is not set.
L09Capacity code of indoor unit is not set.
L10Capacity code of outdoor unit is not set.
L184-way valve operation failure.
P01Thermal protector in indoor unit fan motor is activated.
P09Improper wiring connections of ceiling panel.
P10Float switch is activated.
P12Operation of protective function of fan inverter
P03Incorrect discharge temperature. (Comp. No. 1)
P04The internal circuit of the high pressure switch is dead
P05Power supply circuit failure, missing-phase detection.
P13There is a trouble with the outdoor unit when the liquid valve and the gas valve are closed.
P14O2 sensor (detects low oxygen level) activated
P16Compressor running failure resulting from missing phase in the compressor wiring, etc.
P22Outdoor unit fan motor is unusual.
H31IPM trip (IPM current or temperature)
P29Missing-phase/reverse-phase in the compressor wiring, Compressor start-up failure
F01Indoor coil temp. sensor (E1)
F03Indoor coil temp. sensor (E3)
F10Indoor suction air (room) temp. sensor (TA)
F11Indoor discharge air temp. sensor (BL)
F04Compressor No. 1 discharge gas temp. sensor (TD)
F07Outdoor No. 1 coil liquid temp. sensor (C1)
F08Outdoor air temp. sensor (TO)
F12Compressor intake port temperature sensor (TS)
F16High pressure sensor failure
F29EEPROM on indoor unit PCB failure
F31EEPROM on the outdoor unit PCB is a failure.
H01Overcurrent of power supply current (CT) sensor
H02PAM failure
H03Power supply current (CT) sensor failure
C05Indoor or main outdoor unit is not operating correctly. Mis-wiring of control wiring between indoor unil, main outdoor unit and system controller.
C06Indoor or main outdoor unit is not operating correctly. Mis-wiring of control wiring between indoor unit, main outdoor unit and system controller. CN1 is not connected properly.
P30When using wireless remote controller or system controller, in order to check the alarm message in detail, connect wired remote controller to indoor unit temporarily.


Panasonic Air Conditioner Troubleshooting
Panasonic Air Conditioner Troubleshooting

The following symptoms do not indicate malfunction;

Mist emerges from indoor unit.Condensation effect due to cooling process
Water flowing sound during operation.Refrigerant flow inside the unit.
The room has a peculiar odourThis may be due to damp smell emitted by the wall, carpet, furniture or clothing
Indoor fan stops occasionally during automatic fan speed settingThis helps to remove the surrounding odour
Airflow continues even after operation has stoppedExtraction of remaining heat from the indoor unit (maximum 30 seconds)
Operation is delayed a few minutes after restartingThe delay is a protection to the unit’s compressor
Outdoor unit emits water/steamCondensation or evaporation occurs on pipes
POWER indicator blinks during HEAT mode with no warm air supply (and louver is closed)The unit is in defrost mode (and AIR SWING is set to AUTO)
Indoor fan stops occasionally during heating operationTo avoid unintended cooling effect
POWER indicator blinks before the unit is switched onThis is a preliminary step in preparation for the operation when the ON timer has been set
Cracking sound during operationChanges of temperature caused the expansion/contraction of the unit
POWER indicator blinks 3 seconds ON and 0.5 seconds OFF during operationCause: The unit is in Demand Response Mode. Check: the following before calling for servicing
Noisy during operationCheck: Check if the unit has been installed at an incline. Close the front panel properly.
Remote control does not workCheck: Insert the batteries correctly. Replace weak batteries.
The unit does not workCheck: Check if the circuit breaker is tripped. Check if timers have been set.
The unit does not receive the signal from the remote control.Check: Make sure the receiver is not obstructed. Certain fluorescent lights may interfere with signal transmitter. Please consult authorised dealer.

Wiring Diagram

Panasonic AC Wiring Connection Diagram-Outdoor Unit
Wiring Connection Diagram-Outdoor Unit
Panasonic AC Wiring Connection Diagram-Indoor Unit
Wiring Connection Diagram-Indoor Unit
Panasonic AC Electronic Circuit Diagram-Outdoor Unit
Electronic Circuit Diagram-Outdoor Unit
Panasonic AC Electronic Circuit Diagram-Indoor Unit
Electronic Circuit Diagram-Indoor Unit


Panasonic AC Manual PDF

Panasonic Mini VRF AC Manual PDDF

Panasonic Cassette Air Conditioner MANUAL PDF


*If you can't find the code you're looking for on our site, please let us know, and we'll update our database as soon as possible.

16 thoughts on “Panasonic AC Error Codes – Most Common Error Messages”

Leave a Comment