Panasonic AC Error Codes List (Split, Inverter) and Fixes

This blog discussed the various error codes on Panasonic ACs and the remedial measures. Generally, we advise users not to repair their Panasonic ACs by themselves because multiple parts of the AC are under warranty.

The warranty becomes void if any third-party Air Conditioner service technician tries to repair the defects. So, booking a service call and getting an authorized Panasonic AC technician to handle these problems is advisable.

How do you find out the error codes on Panasonic ACs?

Whenever an error occurs on the Panasonic ACs, they turn off, and the timer LED on the panel starts blinking. Panasonic ACs have a unique remote controller to help determine the error codes. You will see the Check option on the Panasonic remote controller.

Insert the pin in the spot beneath the Check option until the remote controller screen shows the ‘Double Minus Sign.’ Keep pressing the Up or Down arrow that flashes the error codes on the screen. You will hear a beep sound when the concerned error code displays on the screen. Note it down and refer to the chart supplied with the AC appliance. Share the details with the AC technician to help identify the problems quickly.

Panasonic AC Error Codes

We shall discuss the error codes and resolutions for residential air conditioners alone. However, please note if there are multiple indoor units, each indoor unit will display its unique error code. Therefore, these error codes can vary from one model to another.

Error Code H00 – No issues; the AC is working perfectly.

The code H00 indicates there is no fault with the AC. However, you can check the filters if you do not experience optimal cooling. They might be clogged with dirt. Please remove the cover gently. You can pull out the filters easily. Brush the dust off or use a vacuum cleaner. Wash the filters well and install them back into the machine. The colling should improve.

Error Code H11 – Communication fault between the indoor and the outdoor unit

The cables connecting the indoor and outdoor units could have snapped. There might be a plumbing issue. Otherwise, the PCB might be defective. The authorized Panasonic AC technician should attend to this problem and take appropriate action. Usually, the PCBs are under warranty.

Error Code H12 – Power mismatch between the indoor and outdoor units

Such a situation can arise if you install incompatible IDU and ODU. It can also occur if one ODU connects with multiple IDUs. Please check the overall capacity of the units. This problem is an installation error. It requires you to change the units accordingly and install the correct devices.

Error Code H14 – Air sensor disconnected or shorted

Sensors can get disconnected or snap due to various reasons. Excessive heat or pressure can cause them to get shorted. Similarly, a PCB fault can also cause this issue. Hence, the AC technician should investigate the fault properly and reconnect or replace the air sensor accordingly.

Error Code H15 – Open circuit or compressor temperature sensor short circuit

Incorrect refrigerant levels can cause the temperature and pressure to rise or fall inconsistently. In addition, it can affect the temperature sensors, which could get short-circuited. The AC technician should attend to the fault and replace or reconnect the temperature sensors.

Error Code H16 – Low power consumption by the ODU

The reasons for error code H16 can be many. The refrigerant levels could be low. An open circuit in the power transmitter circuit of the ODU PCB can cause this error. It could also be the result of the IPM power module failure. The solution is to summon the authorized AC technician who will attend to the faults accordingly and resolve the issue.

Error Code H17 – Open/Short circuit of the temperature sensor on the refrigerant suction pipe

The AC technician is the right person to investigate the faults. For example, there might be a PCB circuit failure. The refrigerant levels might be inadequate. The solution is to rectify the underlying defects and reconnect the temperature sensor. The technician might replace the sensor if damaged.

Error Code H19 – IDU fan motor fault

The reason for the IDU motor jamming could be the loose winding of the coil or the malfunctioning of the capacitors. In addition, a problem with the PCB or wire connectors can cause this problem. The solution is to check and repair the fan motor or replace the capacitor. The PCB circuit might also need repairs.

Error Code H21 – Blocked drainage or float sensor defective

Usually, a blockage in the drain pipe can cause the float sensor to snap or become faulty. The resolution I to remove the blockage and reconnect the sensor. Users should not replace the sensors by themselves. The AC technician is the right person to handle such problems.

Error Code H23 – Evaporator temperature sensor N1 disconnected or closed

The refrigerant levels need checking because a shortage of refrigerant can cause heat buildup and the disconnection of the N1 sensor. The technician should address the root cause and replace or reconnect the sensor.

Error Code H24 – Evaporator temperature sensor N2 closed or broken

The solution is to call the authorized service technician who has to address the root cause of the problem. It could be inadequate refrigerant levels of a defective PCB. The N2 sensor might need replacement if damaged.

Error Code H25 – Defective Ionization unit or internal board

The AC technician is the right person to attend to such faults. The solution would be repairing the ionization unit and replacing the defective internal board.

Error Code H26 – Ionizer fault

The authorized service technician should check whether the ionizer is functioning or has become defective. Accordingly, the ionizer requires repairs or replacement.

Error Code H27 – Street temperature sensor short circuit

A defective PCB or inadequate refrigerant levels can cause the street temperature sensor to become faulty and disconnected. The AC technician should replace or reconnect the sensor.

Error Code H28 – Capacitor temperature sensor N1 disconnected or closed

The AC technician should check the refrigerant levels and act accordingly. Inadequate refrigerant can cause a rise in the temperature levels, leading to the closure or disconnection of the capacitor temperature sensor N1. The resolution is to look for the root cause and replace and reconnect the N1 sensor.

Error Code H30 – Discharge temperature sensor is closed or broken.

The solution is to replace or reconnect the defective discharge temperature sensor after addressing the prime cause. For example, it could be inadequate refrigerant or a faulty PCB.

Error Code H32 – The temperature sensor at the condenser output is broken or closed

The underlying fault could be a defective OCB or abnormal refrigerant levels. The technician should investigate the problem and act accordingly. The solution is replacing or reconnecting the damaged sensor.

Error Code H33 – Interconnect error

There might be snapped wiring or a damaged PCB. The technician should act accordingly.

Error Code H34 – Power module heatsink temperature sensor short circuit

An abnormal rise in the temperature due to inadequate refrigerant levels can cause the short-circuiting of the power module heatsink temperature sensor. The solution is to replenish the refrigerant levels and replace or reconnect the sensor.

Error Code H35 – Drainage blockage or pump malfunction

The solution is to clear the drain blockage. Checking the pump motor winding can help resolve the problem. The winding resistance should be around 200 Ohms. The technician should rewind the motor and resolve the issue.

Error Code H36 – ODU gas tube temperature sensor damaged or closed.

The solution is to check the refrigerant levels and refill the gas. Then, replace or reconnect the temperature sensor to resolve the problem.

Error Code H37 – ODU liquid tube temperature sensor short circuit

The reason could be inadequate gas levels. Refill the gas and replace the liquid tube temperature sensor.

Error Code H38 – Mismatch between the IDU and the ODU

It is an installation error. Please check the IDU and ODU numbers for compatibility and get the faulty unit replaced.

Error Code H39 – Mix up of the wires and the refrigerant circuits, a faulty solenoid valve of the ODU.

Such a situation can occur in a multi-split system. The solution is to connect the units properly. The solenoid valve requires replacement if it is faulty.

Error Code H41 – Inconsistency in the wires and refrigerant conduits

Checking the cables and reconnecting them properly can resolve the issue. A qualified AC technician is the right person to undertake this repair job.

Error Code H50 – Defective fan motor or board

The fan motor can malfunction because of loose winding or a PCB fault. Repairing the coils and rewinding them can solve the issue. However, the PCB might need replacement if the board has a significant defect.

Error Code H51 – Nozzle Blockage

The nozzle blockage error can happen in the AC robot. A qualified Panasonic technician is the right person to handle this issue.

Error Code H52 – Malfunction of the limiter switch

The error code H52 is observed in the AC robot. The solution is to summon a qualified technician to attend to the problem.

Error Code H58 – Malfunction of the Patrol sensor unit

The Panasonic technician is the right person to handle such issues. The resolution is to replace the patrol sensor unit.

Error Code H64 – Malfunction of the high-pressure sensor

Inadequate refrigerant levels can cause the high-pressure sensor to malfunction. The solution is to restore refrigerant levels and replace the high-pressure sensor.

Error Code H97 – Faulty compressor motor, defective IDU board

Servicing the compressor motor and checking the winding can resolve the issue. Usually, the compressor does not become defective. A 10-year warranty covers them. The faulty IDU board needs replacement.

Error Code H98 – Sensor malfunction, IDU circuit breaker fault because of overheating in the heat mode, insufficient heat removal issue from the heat exchanger of the IDU

The faulty sensor needs replacement. In addition, the refrigerant levels need checking and refilling. The technician should check for all the underlying faults and reset the circuit breaker before restarting the AC.

Error Code H99 – Freezing of the evaporator

Usually, it is also known as a defrosting error. Switching off the AC for some time and restarting it can help the ice to melt away. However, users should book a service call and summon the AC technician from Panasonic if the issue persists.

Error Code F11 – Incorrect operation of the 4-way valve

Replacing the 4-way valve or connecting it correctly should resolve the problem.

Error Code F17 – Freezing of the IDU in standby mode

Switching off the AC and restarting after ten minutes should reset the error and resolve the issue. It allows the excess ice to melt and drain away. It is better to check the drain pipe for blockages that cause water accumulation and subsequent freezing.

Error Code F90 – Open circuit of compressor winding, the difference in winding resistance, malfunctioning of the inverter board

The compressor winding needs to be tightened. The AC technician should check the winding resistance and set it to optimal levels. The defective inverter board requires replacement.

Error Code F91 – Incorrect operation of the refrigeration circuit, low-pressure protection

The AC technician is the perfect person to resolve the issue. Repairing the refrigeration circuit is the right solution. However, the technician should check for other underlying faults before resetting the low-pressure protection circuit breaker.

Error Code F93 – Open compressor winding, inverter board malfunction

Repairing the open compressor winding resolves the issue. The faulty inverter board might require replacement.

Error Code F94 – Over-pressure protection

Abnormal refrigerant levels can cause the over-pressure protection circuit breaker to trip. The resolution is to check the refrigerant levels and refill the gas if necessary. Users should not reset the circuit breaker without addressing the underlying issues.

Error Code F95 – ODU heat exchanger overheating

A reduction in the refrigerant level can cause the ODU heat exchanger to overheat. Therefore, the technician should check refrigerant levels and refill the gas.

Error Code F96 – Overheating of the power module

To rectify the issue, the technician should check for underlying causes like short-circuits in the PCB or low refrigerant levels.

Error Code F97 – High compressor discharge temperature, overheating of the compressor

The refrigerant levels might be low, or there could be reduced pressure, resulting in high compressor discharge temperature. Refilling the gas and restoring the pressure should reduce the overheating of the compressor and restore it to normal levels.

Error Code F98 – protection for total current consumption

The authorized service technician should look for all underlying faults resulting in total power consumption fluctuations. Users should not reset the circuit breaker and restart the AC. The technician is the right person to attend to such faults.

Error Code F99 – DC protection system error

The reasons could be the compressor’s jamming or the transistor module’s failure. There could be a fault with the PCB current sensor on the ODU. The compressor winding resistance could be below normal levels. The solution is attending to all these faults. Hence, users should book a service call and summon the Panasonic service technician.

Final Thoughts

Generally, all AC faults require the intervention of the authorized Panasonic service technician. So, we advise users not to attempt to repair any defect independently. The AC warranty can become void. The cleaning of the filters is the only activity that users can do themselves.

Gaurav Arvind
Gaurav Arvind
I am a software engineer by profession but blogger by passion. I have been doing blogging, reviews and writing about products for the past 3 years. I love what I do. If you can't tell me what it's made of, I won't tell you how good it is !


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