What causes cracking noises in my Panasonic S-3650PF3E Air Conditioner?
- AAlison HarrisonSep 23, 2025
The cracking noise you hear during or after using your Panasonic Air Conditioner is due to temperature changes in its parts.
What causes cracking noises in my Panasonic S-3650PF3E Air Conditioner?
The cracking noise you hear during or after using your Panasonic Air Conditioner is due to temperature changes in its parts.
Why does the fan continue to rotate after I turn off my Panasonic S-3650PF3E Air Conditioner?
If the fan is rotating for a while even though the Panasonic Air Conditioner operation stops, it may be rotating to dry the heat exchanger depending on the setting.
Why is my Panasonic Air Conditioner not cooling or heating properly?
If your Panasonic Air Conditioner isn't cooling or heating well, check if the air intake or output of the indoor and outdoor units are blocked by dust or other objects; if so, remove the obstructions. Also, make sure the fan speed isn't set to “Low”; try setting it to “Medium” or “High”. Finally, verify that the temperature settings are correct.
Why does my Panasonic Air Conditioner have condensation near the vent?
Dewdrop accumulation near the air discharge of your Panasonic Air Conditioner during operation happens because indoor moisture is cooled by the airflow, causing it to condense.
Why is my Panasonic S-3650PF3E making noise during heating operation?
The noise you hear during heating operation is likely due to the defrost operation being in process.
Why does my Panasonic Air Conditioner smell when it's running?
If you notice an odor coming from your Panasonic Air Conditioner during operation, it may be due to indoor odor components like cigarette or cosmetic odors that have accumulated inside the unit. It could also be that the unit inside is dusty. In this case, it's best to consult your dealer.
How to turn on nanoe™ X on my Panasonic S-3650PF3E Air Conditioner?
If is not displayed on the remote controller, check if nanoe™ X has been set to OFF and set it to ON.
Why does my Panasonic S-3650PF3E have dewdrops near the air outlet?
Dewdrops accumulate near the air outlet during cooling operation because internal moisture is cooled by cool wind and accumulates as dewdrops.
Why do dewdrops accumulate near the air outlet of my Panasonic S-3650PF3E Air Conditioner?
Dewdrops accumulate because internal moisture is cooled by the cool wind and condenses.
Why does my Panasonic S-3650PF3E make a humming noise?
The humming noise is the sound of nanoe™ X being discharged.
Guidelines for proper installation of the unit.
Common symptoms and causes for indoor/outdoor units.
Essential checks before contacting a service dealer.
Technical details for the indoor unit.
Technical details for the outdoor units.
Guidelines for proper installation of the unit.
Common symptoms and causes for indoor/outdoor units.
Essential checks before contacting a service dealer.
Technical details for the indoor unit.
Technical details for the outdoor units.
This document provides operating instructions for a Panasonic Middle Static Pressure Duct (Type F3) air conditioner, designed for commercial use. It covers installation, operation, maintenance, and troubleshooting.
The Panasonic Middle Static Pressure Duct air conditioner is an indoor unit (Type F3) that works in conjunction with an outdoor unit (Single Split). It is designed to provide comfortable room conditions by cooling or heating the air. The unit can be installed either horizontally in the ceiling or vertically, with air intake from the rear side.
A key feature of this air conditioner is the integrated nanoe™ X Function. This biocidal product generates negative ions using ambient air or water, which are then released into the room. The nanoe™ X function aims to provide healthier air by deactivating bacteria and viruses, reducing odors, and inhibiting mold growth on surfaces. By default, this function operates automatically upon purchase. Users can refer to the remote controller's operating instructions if they wish to turn it off, though its effectiveness may vary depending on installation conditions.
The air conditioner operates in various modes, including cooling, heating, and "DRY" operation. During "DRY" operation, once the room temperature reaches the set level, the outdoor unit cycles on and off automatically. If the room temperature is close to the set level, the fan speed automatically adjusts to a "breeze" (light wind) setting.
In the event of a power failure while the unit is running, it is designed to automatically resume operation with the settings that were active prior to the power failure.
The air conditioner can be controlled using various optional remote controllers, including Wireless Remote Controller (Model No. CZ-RWS3 with receiver CZ-RWRC3), Timer Remote Controller (Model No. CZ-RTC4), High-spec Wired Remote Controller (Model No. CZ-RTC5B), and Wired Remote Controller (Model No. CZ-RTC6 series). Detailed operating instructions for adjusting airflow direction and other settings are provided with each remote controller.
For optimal energy saving, users are advised to avoid blocking the air intake and outlet of the unit, as obstruction can impair performance and cause malfunction. During cooling operation, using sunshades, blinds, or curtains can help prevent direct sunlight from entering the room, thereby improving efficiency. Keeping windows, doors, and other openings closed also helps prevent conditioned air from escaping.
The unit also features a defrosting operation during heating mode to melt frost formed on the outdoor unit. During defrosting, the indoor unit fan may stop or run at a very slow speed, and a "STANDBY" indicator may appear. Heating operation resumes after several minutes once the indoor heat exchanger coil warms up sufficiently.
Regular maintenance is crucial for the air conditioner's performance and longevity. Users are advised to keep the air filter clean, as a clogged filter can impair the unit's performance. For air filter cleaning, users should consult their dealer or service center.
For safety, it is essential to turn off the air conditioner and disconnect the power before any cleaning or servicing to prevent electric shock or injury from rotating fan parts. Water should not be poured on the indoor unit, as this can damage internal components and cause electric shock. Solvents, harsh chemicals, or very hot water should not be used to wipe plastic parts, as this may cause deformation or discoloration. Care should be taken when cleaning metal edges and sharp aluminum fins to avoid injury. For indoor units installed in high locations, a firm stool or ladder should be used.
The internal coil and other components of the outdoor unit require periodic cleaning, which should be performed by a dealer or service center. Users should not attempt to clean the inside of the indoor or outdoor units themselves.
In case of any malfunction, such as frequent ELCB trips, the unit not starting, power disconnection when the cord is moved, burnt odor, abnormal noise, deformation, abnormal heat, water leaks, or uncontrolled fan speed, users should immediately stop using the product, disconnect power, and contact their local dealer for maintenance or repair. The document explicitly states that users should not attempt to repair the appliance themselves.
| Heating Capacity | 4.0 kW |
|---|---|
| Refrigerant | R32 |
| Power Supply | 220-240 V, 50 Hz |
| Type | Split System |
| Noise Level (Outdoor) | 48 dB |
| Air Flow (Indoor) | 10.2 m³/min |
| Air Flow (Outdoor) | 18.0 m³/min |












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