Why does my Panasonic CU-E12LKE make a water flowing sound during operation?
- AamartinezSep 1, 2025
The water flowing sound you hear during the operation of your Panasonic Air Conditioner is due to refrigerant flow inside the unit.

Why does my Panasonic CU-E12LKE make a water flowing sound during operation?
The water flowing sound you hear during the operation of your Panasonic Air Conditioner is due to refrigerant flow inside the unit.
Why is my Panasonic CU-E12LKE freezing up during cooling?
If your Panasonic Air Conditioner is experiencing indoor freeze protection during cooling, it's likely due to an air short circuit at the indoor unit. Check the indoor heat exchanger, air filter, and for any air circulation short circuits.
Why does my Panasonic CU-E12LKE make a cracking sound during operation?
The cracking sound during operation of your Panasonic Air Conditioner is due to changes in temperature causing the expansion and contraction of the unit.
What causes an indoor/outdoor misconnection abnormality in a Panasonic CU-E12LKE Air Conditioner?
If there's an indoor/outdoor misconnection abnormality with your Panasonic Air Conditioner, it's caused by different rated voltages between the indoor and outdoor units. Check the indoor and outdoor units to resolve this.
What does it mean when my Panasonic CU-E12LKE Air Conditioner says 'indoor unit capacity unmatched'?
If your Panasonic Air Conditioner displays an indoor unit capacity unmatched error, it means that the total indoor capability is either more than the maximum limit or less than the minimum limit, or the number of indoor units is less than two. Check the indoor/outdoor connection wire, indoor/outdoor PCB, and the specification and combination table in the catalogue.
How to fix an outdoor discharge pipe temperature sensor abnormality on a Panasonic Air Conditioner?
If your Panasonic Air Conditioner displays an outdoor discharge pipe temperature sensor abnormality, it means the sensor is either open or short circuit. Check the outdoor discharge pipe temperature sensor lead wire and connector.
What should I do if my Panasonic CU-E12LKE displays an indoor E-Ion abnormality?
If your Panasonic Air Conditioner shows an Indoor E-Ion abnormality, check the E-Ion PCB.
What to do if my Panasonic Air Conditioner unit stops and the timer indicator blinks?
To address this issue, use the remote control to retrieve the error code: press for 5 seconds, then press until you hear a beep sound and note the error code. For certain errors, you may restart the unit with limited operation, indicated by 4 beeps during start-up. If the problem persists, turn the unit off and provide the error code to an authorized dealer.
What does it mean when the power indicator blinks during HEAT mode with no warm air supply in my Panasonic CU-E12LKE Air Conditioner?
If the power indicator blinks during HEAT mode and there's no warm air supply from your Panasonic Air Conditioner, the unit is likely in defrost mode and the AIR SWING is set to AUTO.
What does it mean when the timer indicator is always on in my Panasonic Air Conditioner?
If the timer indicator on your Panasonic Air Conditioner is always on, it means the timer setting repeats daily once set.
| Cooling Capacity | 3.5 kW |
|---|---|
| Heating Capacity | 4.0 kW |
| Power Supply | 220-240V, 50Hz |
| Refrigerant | R410A |
| Indoor Unit Dimensions (W x H x D) | 870 x 290 x 214 mm |
| Weight (Indoor Unit) | 9 kg |
| Operating Temperature (Heating) | -15°C to 24°C |
| Operating Temperature (Cooling) | 43 °C |
Explains warning, caution, prohibition, and compulsory symbols used in the manual.
Lists safety measures for indoor, outdoor units, and remote control usage.
Specifies the acceptable indoor temperature ranges for cooling and heating operations.
Warns against using modified cords, sharing outlets, and operating with wet hands.
Advises on replacing damaged cords and the importance of earthing for electrical safety.
Instructs on turning off power during emergencies or strong lightning.
Specifies operating temperature limits for cooling and heating for single split outdoor units.
Details simultaneous/individual operation of indoor units and mode priority.
Provides temperature ranges for cooling and heating for multi split outdoor units.
Provides instructions for cleaning the indoor unit, front panel, filters, and e-ion generator.
Describes key indoor unit parts like louvers, sensors, receivers, and their handling.
Covers remote control indicators, turning the unit on/off, and setting temperature.
Details selection of operation modes (AUTO, HEAT, COOL, DRY) and fan speed options.
Explains adjusting airflow direction and features for humidity and quiet operation.
Describes ECO PATROL functions for monitoring presence and saving energy.
Details PATROL sensor for air quality monitoring and e-ion for air purification.
Explains quick temperature adjustment and setting ON/OFF timers.
Lists common operating sounds or conditions that do not indicate a unit fault.
Provides a checklist of common issues and their solutions before contacting service.
Describes how to retrieve error codes using the remote control.
Provides guidance for inspection after non-use and preparing for extended periods.
Lists conditions requiring immediate consultation with an authorized dealer.
Explains symbols and procedures for collecting and disposing of old electrical equipment.
Provides information on the proper collection and disposal of used batteries.
Instructions for inserting batteries, closing the cover, and setting the clock.
Details how to select operation modes like AUTO, HEAT, COOL, and DRY.
Explains how to start/stop the unit and select the desired temperature.












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