What causes the F99 (Output Over Current Detection) error in Panasonic Air Conditioner?
- HHannah PhamSep 23, 2025
The F99 error code indicates an Output Over Current Detection. This can be caused by a faulty outdoor unit PCB or a faulty compressor.

What causes the F99 (Output Over Current Detection) error in Panasonic Air Conditioner?
The F99 error code indicates an Output Over Current Detection. This can be caused by a faulty outdoor unit PCB or a faulty compressor.
What does H99 error mean on my Panasonic CS-E9NKDW?
The H99 error code on your Panasonic Air Conditioner indicates an indoor freeze prevention protection during cooling or soft dry modes. This can be caused by several factors: an air short circuit at the indoor unit, a clogged air filter, dust accumulation on the heat exchanger, a closed 2/3 way valve, a faulty fan motor, refrigerant shortage (leakage), a clogged expansion valve or strainer, a faulty pipe temperature sensor, or a faulty indoor unit PCB.
What does error code F95 mean on a Panasonic CS-E9NKDW?
The F95 error code indicates a cooling high pressure abnormality. This could be due to an air short circuit at the indoor unit, dust accumulation on the indoor unit heat exchanger, a closed 2/3 way valve, a faulty outdoor unit fan motor, excessive refrigerant, a clogged expansion valve or strainer, a faulty outdoor pipe temperature sensor, or a faulty outdoor unit PCB.
Why does my Panasonic CS-E9NKDW show H12 (Indoor/Outdoor Capacity Rank Mismatched) error?
The H12 error code on your Panasonic Air Conditioner indicates a capacity rank mismatch between the indoor and outdoor units. This can occur due to wrong models being interconnected, incorrect indoor or outdoor unit PCBs being mounted, defective PCBs, or signal transmission errors caused by incorrect wiring or wire breakage.
What causes the F93 Compressor Rotation Failure in Panasonic Air Conditioner?
The F93 error code indicates a compressor rotation failure. This could be due to a disconnected compressor terminal, a faulty outdoor PCB, or a faulty compressor.
What does H32 error mean on my Panasonic Air Conditioner?
The H32 error code on your Panasonic Air Conditioner indicates an abnormality with the outdoor heat exchanger temperature sensor 2. This can be caused by a faulty connector connection, a faulty sensor, or a faulty PCB.
What does H27 error mean on my Panasonic CS-E9NKDW?
The H27 error code on your Panasonic Air Conditioner indicates an abnormality with the outdoor air temperature sensor. This can be caused by a faulty connector connection, a faulty sensor, or a faulty PCB.
What does H28 error mean on my Panasonic Air Conditioner?
The H28 error code on your Panasonic Air Conditioner indicates an abnormality with the outdoor pipe temperature sensor. This can be caused by a faulty connector connection, a faulty sensor, or a faulty PCB.
What does F11 (4-way valve Abnormality) mean for Panasonic Air Conditioner?
The F11 error code indicates a 4-way valve abnormality. This can be caused by a connector in poor contact, a faulty sensor, a faulty outdoor unit PCB, or a defective 4-way valve.
What causes the F97 (Compressor Overheating) error in Panasonic CS-E9NKDW Air Conditioner?
The F97 error code indicates compressor overheating. This can be caused by a faulty compressor tank temperature sensor, a closed 2/3 way valve, refrigerant shortage (refrigerant leakage), a faulty outdoor unit PCB, or a faulty compressor.
| Brand | Panasonic |
|---|---|
| Model | CS-E9NKDW |
| Category | Air Conditioner |
| Language | English |
Essential safety measures and warnings for servicing and installation.
Detailed technical specifications for various models.
Highlights key features like inverter technology and air purification.
Details the location of controls and components within the indoor unit.
Identifies the components of the outdoor unit.
Identifies controls and components on the remote control.
Provides dimensional details for indoor units.
Provides dimensional details for outdoor units.
Illustrates the refrigeration cycle for specific models.
Illustrates the refrigeration cycle for the CU-E18NKD model.
Shows the functional block diagram for specific models.
Shows the functional block diagram for the CU-E18NKD model.
Details wiring connections for indoor units.
Details wiring connections for outdoor units.
Provides the electronic circuit diagram for indoor units.
Provides the electronic circuit diagram for outdoor units.
Details various PCBs used in the indoor unit.
Details PCBs used in the outdoor unit.
Guidance on choosing optimal locations for indoor and outdoor units.
Step-by-step guide for installing the indoor unit.
Steps for installing and connecting the outdoor unit.
Details core functions like cooling, heating, and auto modes.
Explains indoor and outdoor fan motor operation and control.
Covers airflow control, quiet, powerful, and timer operations.
Explains indicator lights and auto restart functionality.
Details nanoe-G, Mild Dry Cooling, ECONAVI, and AUTO COMFORT.
Covers cooling, dry, and heating operations for multi-split systems.
Details fan operation, timer, auto restart, and indication panel for multi-split.
Covers restart, current, and IPM protections for all operations.
Details compressor overheating, low pressure, and frequency controls.
Covers protections specific to cooling and soft dry modes.
Details protections for heating operations.
Explains servicing modes using the Auto OFF/ON button and remote control.
Guides on diagnosing issues related to the refrigeration cycle.
Details how to use the self-diagnosis function for error codes.
Lists and explains all error codes.
Provides troubleshooting methods for various error codes (H11-F99).
Step-by-step guide to disassemble indoor unit components.
Step-by-step guide to disassemble E18NK indoor unit components.
Guide to remove the electronic controller from outdoor units.
Guide to remove the electronic controller from the E18NKD outdoor unit.
Details performance characteristics across various conditions.
Presents sensible cooling capacity data for different models.
Visual breakdown and part list for indoor units.
Visual breakdown and part list for CS-E18NKDW indoor unit.
Visual breakdown and part list for outdoor units.
Visual breakdown and part list for CU-E18NKD outdoor unit.












Loading...