Panasonic Air Conditioners Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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F11
Indoor unit displays F11; operation may stop or be restricted.
Indoor-Outdoor Communication Error (Alternate Code Set)
F90
Unit stops with F90; compressor may not start or may stop quickly.
Inverter Compressor Start-Up Failure
F91
Unit stops with F91; poor cooling or heating performance.
Refrigerant Circuit Abnormal (Undercharge / Flow Issue)
F93
Unit stops with F93; compressor speed control abnormal.
Compressor Speed / Inverter Control Error
F95
Unit stops with F95; often during high outdoor temperatures or heavy load.
Outdoor Unit Overheating / High Discharge Temperature
F96
Unit stops with F96; inverter overheating protection activated.
Inverter PCB Overheating
F97
Unit stops with F97; compressor overcurrent or overheating.
Compressor Overload / Overcurrent Protection
F98
Unit stops with F98; high current protection triggered.
Abnormal High Current Detection
F99
Unit stops with F99; inverter module protection.
Inverter Module / Power Transistor Protection
H11
Indoor unit stops and will not run; outdoor unit does not start; H11 displayed on indoor unit or remote.
Indoor-Outdoor Communication Error
H12
Multi-split system: one or more indoor units do not operate; H12 displayed on remote or indoor unit.
Indoor Unit Capacity / Connection Mismatch
H14
Indoor unit stops cooling or heating; fan may run; H14 displayed indicating temperature sensor fault.
Indoor Room Temperature Sensor (Thermistor) Fault
H15
Outdoor unit does not start; indoor unit may show H15 and stop operation.
Outdoor Compressor Temperature Sensor Fault
H16
Outdoor unit does not operate; indoor unit may run briefly then stop; H16 displayed.
Outdoor DC Current Sensor / Overcurrent Fault
H19
Indoor unit does not start or stops shortly after starting; H19 displayed.
Indoor Fan Motor Lock / Hall Sensor Fault
H21
Unit stops and displays H21; often associated with abnormal indoor coil temperature readings.
Indoor Heat Exchanger (Coil) Temperature Sensor Fault
H23
Outdoor unit does not operate correctly; H23 displayed; often in heating mode.
Outdoor Heat Exchanger Temperature Sensor Fault
H24
Unit stops with H24; often related to outdoor air temperature reading.
Outdoor Air Temperature Sensor Fault
H25
Unit stops and displays H25; often associated with abnormal discharge pipe temperature.
Discharge Pipe Temperature Sensor Fault
H27
Indoor unit shows H27; operation stops or is restricted.
Indoor Humidity Sensor Fault (models equipped with humidity control)
H28
Unit stops with H28; often related to frost or defrost control issues.
Frost Protection / Indoor Coil Sensor Abnormality
H30
Unit stops and displays H30; often associated with indoor fan abnormality.
Indoor Fan Motor Overload / Lock
H32
Multi-split system: H32 displayed; some indoor units may not operate.
Refrigerant System Abnormality / Indoor Unit Connection Error
H33
H33 displayed; unit may not start or may shut down quickly.
Outdoor Airflow / Fan System Abnormality
H34
Unit stops with H34; often related to low-pressure protection.
Low Pressure / Refrigerant Shortage Protection
H38
H38 displayed; unit may not start or may run with reduced performance.
Inverter Compressor Position / Phase Error
H41
H41 displayed; unit may not operate correctly in heating mode.
Four-Way Valve (Reversing Valve) Abnormality
H50
Indoor unit shows H50; operation stops or is limited.
Indoor EEPROM / Memory Error
H52
Outdoor unit shows H52; system may not start.
Outdoor EEPROM / Memory Error
Symptom
Indoor unit does not respond to remote control; no beep or operation change.
Remote Control Signal / Receiver Failure
Symptom
Indoor unit emits a musty or moldy smell when starting up.
Biological Growth on Indoor Coil and Drain Pan
Symptom
Indoor unit freezes up; ice forms on the evaporator coil and air outlet.
Evaporator Coil Icing
Symptom
Indoor unit leaks water from the front panel or bottom during cooling operation.
Indoor Unit Condensate Drainage Failure
Symptom
Indoor unit runs but no cooling; air coming out is room temperature or only slightly cooler.
Loss of Cooling Capacity
Symptom
Loud humming or grinding noise from outdoor unit; may be worse at startup.
Outdoor Mechanical Noise / Compressor or Fan Issue
Symptom
Loud rattling or buzzing noise from indoor unit during operation.
Indoor Mechanical Vibration / Loose Components
Symptom
Outdoor unit fan runs but compressor does not start; no cooling or heating.
Compressor Non-Start
Symptom
Outdoor unit is running but indoor fan does not blow air; no airflow from indoor vents.
Indoor Fan Motor Failure
Symptom
Outdoor unit vibrates excessively and transmits noise into the building structure.
Outdoor Vibration / Mounting Issue
Symptom
Unit frequently turns on and off (short cycling) without reaching set temperature.
Short Cycling / Improper Capacity or Control
Symptom
Unit trips the circuit breaker immediately or shortly after starting.
Electrical Overload / Short Circuit
Symptom
Unit will not start at all; no lights on indoor unit.
No Power to Indoor Unit
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| F11 |
Indoor unit displays F11; operation may stop or be restricted.
|
Indoor-Outdoor Communication Error (Alternate Code Set) | View Details |
| F90 |
Unit stops with F90; compressor may not start or may stop quickly.
|
Inverter Compressor Start-Up Failure | View Details |
| F91 |
Unit stops with F91; poor cooling or heating performance.
|
Refrigerant Circuit Abnormal (Undercharge / Flow Issue) | View Details |
| F93 |
Unit stops with F93; compressor speed control abnormal.
|
Compressor Speed / Inverter Control Error | View Details |
| F95 |
Unit stops with F95; often during high outdoor temperatures or heavy load.
|
Outdoor Unit Overheating / High Discharge Temperature | View Details |
| F96 |
Unit stops with F96; inverter overheating protection activated.
|
Inverter PCB Overheating | View Details |
| F97 |
Unit stops with F97; compressor overcurrent or overheating.
|
Compressor Overload / Overcurrent Protection | View Details |
| F98 |
Unit stops with F98; high current protection triggered.
|
Abnormal High Current Detection | View Details |
| F99 |
Unit stops with F99; inverter module protection.
|
Inverter Module / Power Transistor Protection | View Details |
| H11 |
Indoor unit stops and will not run; outdoor unit does not start; H11 displayed on indoor unit or remote.
|
Indoor-Outdoor Communication Error | View Details |
| H12 |
Multi-split system: one or more indoor units do not operate; H12 displayed on remote or indoor unit.
|
Indoor Unit Capacity / Connection Mismatch | View Details |
| H14 |
Indoor unit stops cooling or heating; fan may run; H14 displayed indicating temperature sensor fault.
|
Indoor Room Temperature Sensor (Thermistor) Fault | View Details |
| H15 |
Outdoor unit does not start; indoor unit may show H15 and stop operation.
|
Outdoor Compressor Temperature Sensor Fault | View Details |
| H16 |
Outdoor unit does not operate; indoor unit may run briefly then stop; H16 displayed.
|
Outdoor DC Current Sensor / Overcurrent Fault | View Details |
| H19 |
Indoor unit does not start or stops shortly after starting; H19 displayed.
|
Indoor Fan Motor Lock / Hall Sensor Fault | View Details |
| H21 |
Unit stops and displays H21; often associated with abnormal indoor coil temperature readings.
|
Indoor Heat Exchanger (Coil) Temperature Sensor Fault | View Details |
| H23 |
Outdoor unit does not operate correctly; H23 displayed; often in heating mode.
|
Outdoor Heat Exchanger Temperature Sensor Fault | View Details |
| H24 |
Unit stops with H24; often related to outdoor air temperature reading.
|
Outdoor Air Temperature Sensor Fault | View Details |
| H25 |
Unit stops and displays H25; often associated with abnormal discharge pipe temperature.
|
Discharge Pipe Temperature Sensor Fault | View Details |
| H27 |
Indoor unit shows H27; operation stops or is restricted.
|
Indoor Humidity Sensor Fault (models equipped with humidity control) | View Details |
| H28 |
Unit stops with H28; often related to frost or defrost control issues.
|
Frost Protection / Indoor Coil Sensor Abnormality | View Details |
| H30 |
Unit stops and displays H30; often associated with indoor fan abnormality.
|
Indoor Fan Motor Overload / Lock | View Details |
| H32 |
Multi-split system: H32 displayed; some indoor units may not operate.
|
Refrigerant System Abnormality / Indoor Unit Connection Error | View Details |
| H33 |
H33 displayed; unit may not start or may shut down quickly.
|
Outdoor Airflow / Fan System Abnormality | View Details |
| H34 |
Unit stops with H34; often related to low-pressure protection.
|
Low Pressure / Refrigerant Shortage Protection | View Details |
| H38 |
H38 displayed; unit may not start or may run with reduced performance.
|
Inverter Compressor Position / Phase Error | View Details |
| H41 |
H41 displayed; unit may not operate correctly in heating mode.
|
Four-Way Valve (Reversing Valve) Abnormality | View Details |
| H50 |
Indoor unit shows H50; operation stops or is limited.
|
Indoor EEPROM / Memory Error | View Details |
| H52 |
Outdoor unit shows H52; system may not start.
|
Outdoor EEPROM / Memory Error | View Details |
| – |
Indoor unit does not respond to remote control; no beep or operation change.
|
Remote Control Signal / Receiver Failure | View Details |
| – |
Indoor unit emits a musty or moldy smell when starting up.
|
Biological Growth on Indoor Coil and Drain Pan | View Details |
| – |
Indoor unit freezes up; ice forms on the evaporator coil and air outlet.
|
Evaporator Coil Icing | View Details |
| – |
Indoor unit leaks water from the front panel or bottom during cooling operation.
|
Indoor Unit Condensate Drainage Failure | View Details |
| – |
Indoor unit runs but no cooling; air coming out is room temperature or only slightly cooler.
|
Loss of Cooling Capacity | View Details |
| – |
Loud humming or grinding noise from outdoor unit; may be worse at startup.
|
Outdoor Mechanical Noise / Compressor or Fan Issue | View Details |
| – |
Loud rattling or buzzing noise from indoor unit during operation.
|
Indoor Mechanical Vibration / Loose Components | View Details |
| – |
Outdoor unit fan runs but compressor does not start; no cooling or heating.
|
Compressor Non-Start | View Details |
| – |
Outdoor unit is running but indoor fan does not blow air; no airflow from indoor vents.
|
Indoor Fan Motor Failure | View Details |
| – |
Outdoor unit vibrates excessively and transmits noise into the building structure.
|
Outdoor Vibration / Mounting Issue | View Details |
| – |
Unit frequently turns on and off (short cycling) without reaching set temperature.
|
Short Cycling / Improper Capacity or Control | View Details |
| – |
Unit trips the circuit breaker immediately or shortly after starting.
|
Electrical Overload / Short Circuit | View Details |
| – |
Unit will not start at all; no lights on indoor unit.
|
No Power to Indoor Unit | View Details |
No matching codes found
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