Panasonic EW-DJ31 Rechargeable Dental Beat Instruction Manual

: June 8, 2024
: Panasonic

Table of Contents

Panasonic EW-DJ31 Rechargeable Dental Beat
Product Information
Product Usage Instructions
Safety precautions
Cleaning
Parts identification
How to use
Frequently asked questions
Troubleshooting
Specifications
References
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Panasonic EW-DJ31 Rechargeable Dental Beat

Product Information

Specifications

Model: EW-DJ31
Intended Use: Household Oral Irrigator
Charging: Built-in rechargeable battery
Nozzle: Changeable (Sold separately)

Product Usage Instructions

Safety Precautions
Before using the oral irrigator, please read and follow the safety precautions provided in the user manual to prevent any accidents or injuries.

Parts Identification
Identify the different parts of the oral irrigator to ensure proper assembly and usage. Refer to the user manual for detailed illustrations.

Charging
Ensure the built-in rechargeable battery is fully charged before initial use. Follow the charging instructions provided in themanual for optimal battery performance.

How to Use

Fill the water reservoir with lukewarm water and select your desired pressure setting.
Place the nozzle in your mouth and turn on the device.
Aim the nozzle at the gum line and between teeth to effectively remove plaque and debris.
Move the nozzle along the gum line and between each tooth for thorough cleaning.
Rinse your mouth with water after use and clean the nozzle properly.

Points of Care
After each use, ensure to clean and dry the oral irrigator properly to prevent bacterial growth. Store it in a cool, dry place away from direct sunlight.

After Use
Empty any remaining water from the reservoir and clean the device according to the maintenance instructions provided in the manual.

Frequently Asked Questions (FAQ)

Troubleshooting
If you encounter any issues with the oral irrigator, refer to the troubleshooting section in the manual for common problems and solutions.
Battery Life
The built-in rechargeable battery’s lifespan may vary based on usage. Follow proper charging practices to maximize battery longevity.
Removing the Built-in Rechargeable Battery
If necessary, refer to the manual for instructions on safely removing the built-in rechargeable battery for replacement purposes.

Operating Instructions
(Household use) Oral Irrigator Model No. EW-DJ31

Safety precautions

To reduce the risk of injury, loss of life, electric shock, fire, and damage to property, always observe the following safety precautions.

Explanation of symbols
The following symbols are used to classify and describe the level of hazard, injury, and property damage caused when the denotation is disregarded and improper use is performed.

Denotes a potential hazard

DANGER that will result in serious injury or death.

Denotes a potential hazard

WARNING **** that could result in serious injury or death.

Denotes a hazard that

CAUTION could result in minor injury or property damage.

The following symbols are used to classify and describe types of instructions to be observed.

This symbol is used to alert users to a specific operating procedure that must not be performed.

This symbol is used to alert users to a specific operating procedure that must be followed in order to operate the unit safely.

WARNING
Preventing accidents

Do not store within the reach of children or infants. Do not let them use it.
- Doing so may cause an accident or injury due to accidental ingestion of removable parts.

Power supply

Do not connect or disconnect the adaptor or the appliance plug to a household outlet with a wet hand.
- Doing so may cause electric shock or injury.
  Do not immerse the AC adaptor in water or clean it with water.
- Doing so may cause electric shock or fire due to a short circuit.
Do not place the AC adaptor over or near water filled sink or bathtub.
- Do not use when the AC adaptor is damaged or when the fitting into the household outlet is loose.
Do not damage, modify, forcefully bend, pull, twist, or bundle the cord. Also, do not place anything heavy on or pinch the cord.
- Doing so may cause electric shock or fire due to a short circuit.
Do not use in a way exceeding the rating of the household outlet or the wiring.
- Exceeding the rating by connecting too many power plugs to one household outlet may cause fire due to overheating.
Do not use anything other than the supplied AC adaptor for any purpose. Also, do not use any other product with the AC adaptor. (See page 9.)
- Doing so may cause burn or fire due to a short circuit.
- Always ensure the appliance is operated on an electric power source matched to the rated voltage indicated on the AC adaptor. Fully insert the adaptor.
Failure to do so may cause fire or electric shock.
The supply cord cannot be replaced. If the cord is damaged, the AC adaptor should be scrapped.
- Failure to do so may cause an accident or injury.

In case of an abnormality or malfunction

Immediately stop using and remove the AC adaptor if there is an abnormality or malfunction.
Failure to do so may cause fire, electric shock or injury.
The main unit, adaptor or cord is deformed or abnormally hot.
The main unit, adaptor or cord smells of burning.
There is abnormal sound during use or charging of the main unit.
- Immediately request inspection or repair at an authorized service centre.

This product

This product has a built-in rechargeable battery. Do not throw into fire, apply heat, or charge, use, or leave in a high temperature environment.
Doing so may cause overheating, ignition, or explosion of the built-in rechargeable battery.
Do not modify or repair.
Doing so may cause fire, electric shock, or injury.
Contact an authorized service centre for repair (battery change, etc.).
Never disassemble except when disposing of the product.
Doing so may cause fire, electric shock, or injury.

WARNING
This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance.
Failure to do so may cause an accident or injury.

Cleaning

Always unplug the adaptor from a household outlet when cleaning the AC adaptor.
- Failure to do so may cause electric shock or injury.
Regularly clean the power plug and the appliance plug to prevent dust from accumulating.
- Failure to do so may cause fire due to insulation failure caused by humidity. Disconnect the adaptor and wipe with a dry cloth.

CAUTION
Preventing damage to teeth and gums

People who are unable to operate should not use this appliance.
People with weak oral senses should not use this appliance.
- Doing so may cause injury or damage to teeth and gums.
People who may have periodontal disease, have teeth being treated, or concerned about symptoms within their mouth should consult a dentist before use.
- Failure to do so may cause injury or damage to teeth and gums.

This product

Never use for a purpose other than oral cleaning.
- Doing so may cause an accident or injury when the stream of water is pointed toward the eyes, nose, ears, tongue, or throat.
Do not fill the tank with water warmer than 40 °C.
- Doing so may cause burns.
Do not share nozzle with your family or other people.
- Doing so may cause infection or inflammation.

CAUTION
Note the following precautions

Do not allow metal objects or trash to adhere to the power plug or the appliance plug.
- Doing so may cause electric shock or fire due to a short circuit.
Do not drop or subject to shock.
- Doing so may cause injury.
- Do not put your fingers on the nozzle storage unit or just hold by your hand the portion within the dotted line frame when storing. – Doing so may get your fingers/hand pinched. Do not wrap the cord around the adaptor when storing.
Doing so may cause the wire in the cord to break with the load, and may cause fire due to a short circuit.
Disconnect the adaptor from the household outlet when not charging.
- Failure to do so may cause electric shock or fire due to electrical leakage resulting from insulation deterioration.
Disconnect the adaptor or the appliance plug by holding onto it instead of the cord.
- Failure to do so may cause electric shock or fire due to a short circuit.

After use, clean the main body, water tank and the nozzle and dry them. (See pages 13 to 15.)

Failure to do so may cause damage to your health due to propagation of mold and bacteria.

Handling of the removed battery when disposing

DANGER
The rechargeable battery is exclusively for use with this appliance. Do not use the battery with other products.

Do not charge the battery after it has been removed from the product.
Do not throw into fire or apply heat.
Do not hit, disassemble, modify, or puncture with a nail.
Do not let the positive and negative terminals of the battery get in contact with each other through metallic objects.
Do not carry or store the battery together with metallic jewellery such as necklaces and hairpins.
Do not use or leave the battery where it will be exposed to high temperatures, such as under direct sunlight or near other sources of heat.
Never peel off the tube.
- Doing so may cause overheating, ignition, or explosion.

WARNING

After removing the rechargeable battery, do not keep it within reach of children and infants.
- The battery will harm the body if accidentally swallowed.
If this happens, consult a physician immediately.
- If the battery fluid leaks out and comes in contact with the eyes, do not rub the eyes, and thoroughly rinse with clean water, such as tap water.
- Failure to do so may cause eye injury. Consult a physician immediately.

CAUTION
If the battery fluid leaks out and comes in contact with the skin or clothes, rinse off with clean water, such as tap water.

Failure to do so may cause inflammation.

Intended use

Please use the appliance together with toothbrush. It is hard to remove tartar or dental calculus attached to the tooth surface just by a water jet, so a toothbrush is required to brush the teeth. We recommend rinsing the inside of your mouth with the water jet after brushing your teeth.
When you first begin using the oral irrigator, you may experience slight bleeding of the gums even though your gums may be healthy. This is because your gums
are receiving stimulation by the oral irrigator for the first
time. The bleeding should stop after one or two weeks of use. Bleeding that persists for more than two weeks may be indication of an abnormal condition of your gums, such as periodontal disease. In this case, stop using the oral irrigator and consult your dentist.
Do not put salt, mouthwash or other chemicals into the water tank. Doing so may cause malfunction.
Do not dry the main unit with a dryer or a fan heater. Doing so may cause malfunction or deformation of the parts.
Store the appliance in a place with low humidity after use. Leaving the appliance in a bathroom may cause malfunction.
Wrap the appliance in a towel or the like when carrying it with you. Otherwise, the water may seep out, thus wetting surrounding objects.
Charge the appliance correctly according to these Operating Instructions. (See pages 9 and 10 “Charging”.)
This appliance contains battery that is only replaceable by skilled persons. Please contact an authorized service centre for the details of repair.
The following symbol indicates that a specific detachable power supply unit is required for connecting the electrical appliance to the supply mains. The type reference of power supply unit is marked near the symbol.

Parts identification

Main unit

Main body
Power switch
Level switch
Water pressure level LED indicator (1~4 levels)
Low battery / Charge status indicator (red)
Charging socket
Nozzle release button
Charging socket cover
Nozzle storage unit
Water tank
Water tank cap
Suction hose
Filter
Bottom cover
AC adaptor (RE7-87)
Adaptor
Power plug
Cord
Appliance plug
Regular nozzle (× 1)
The nozzle is a consumable.
Nozzle insertion port

Note
There may be moisture inside the main unit (water tank and suction hose) left from the distilled water used for product testing.

Charging
Wipe the charging socket dry before use if there are water drops in it.

Connect the AC adaptor.

a Open the charging socket cover, and then insert the appliance plug into the charging socket on the main body.
b Insert the adaptor into a household outlet.

About the charging reminder function

During use, charging is required when the low battery / charge status indicator (red) flashes (once a second).
Turning off the power switch “ ” when the battery has little remaining charge, the low battery / charge status indicator will light off after 5 seconds.

Indicator display during charging

How to check if charging is completed

After charging is completed, if you disconnect the power plug and then plug in the power plug again to charge, (the low battery / charge status indicator) lights on and then lights off after about 5 seconds.

For safety and energy saving, disconnect the power plug after charging is completed.

Disconnect the appliance plug from the charging socket, and then close the charging socket cover.
To keep charging the battery will not affect battery performance.

**Operating time after a full charge approx. 10 minutes***
(When the water pressure level is set to 4)

It varies with the ambient temperature and usage conditions.
Charging is completed after approx. 1 hour.
(The charging time may vary with the remaining battery capacity.)

Notes

The charging time may differ when the appliance is used for the first time, or if it has not been used for more than 6 months.
In addition, (the low battery / charge status indicator) may not light on in the first several minutes of charging, but it will light on as the charging proceeds.
The recommended ambient temperature for charging is 10 °C – 35 °C. It may take longer to charge, or will flash rapidly and the battery may fail to charge properly in extremely high or low temperatures.

How to use

Pull out the main body while rotating it, and then install the nozzle.
- Open the water tank cap.
  If it is closed, the main body is hard to be pulled out.
- Pull the main body to the Pull the main body to the Be noted that the nozzle may be ejected from the nozzle storage unit.
- Install the nozzle while holding the main body.
  Install it into place until it clicks.
Fill the water tank with water.
Add water while keeping the main unit level.
Do not fill beyond the full-water position.
Close the water tank cap securely.

  * Always use new tap water or lukewarm water.
  * If you feel the water is cold, use lukewarm water with a temperature of 40 °C or less.
  *  **If the water tank cap comes off**

Align the groove of the water tank cap with the protrusion of the water supply port, and press the water tank cap into place until it clicks.

3. Press the level switch to select your desired water pressure level. After you press the level switch, the last used water pressure level is automatically selected. Then each time you press the level switch, the water pressure level is switched once in the following order: 1 (weak) → 2 → 3 → 4 (strong) → 1… About the water pressure level memory function

The last selected water pressure level will be remembered, from which the appliance will start next time.
When the appliance has not been used for a long time or when the battery is used up, the water pressure level will return to 1.

4.  **Clean inside your mouth with water jet.**
  1. Place the nozzle in your mouth.
  2. Close your mouth gently.
  3. Turn on the power switch “ 
    * You can switch the water pressure level by pressing the level switch, even while using the appliance.
    * If the main unit is tilted too much, the water does not come out from the nozzle.

A fully filled water tank provides approximately 35 seconds of use.
(When the water pressure level is set to 4)

Notes

The appliance does not work when plugged into a household outlet.
For the first use, turn on the power switch “ ” to jet water so that you can check the water pressure level. (Please start using the appliance from water pressure level 1.)
The appliance may not operate in an ambient temperature approximately 5 °C or lower.
Do not push the tip of the nozzle too hard against the teeth or gums.
If you feel that the irritation is strong, turn off the power switch ” ” and use the appliance from water pressure level 1.
Do not turn on the power switch “ ” when the water tank is empty unless you are drying the moisture inside the main unit. (Doing so may cause malfunction.)

Points of care
Change the way you use and move the unit depending on the purpose and the area you want to clean.

Interdental cleaning

Direct the water jet onto the space between the teeth.
Direct water jet onto the front and rear of the teeth.

Periodontal pocket cleaning

Direct the water jet onto the space between the teeth and gums.
Slowly shift the water jet along the gums.
Clean the front and rear sides of the teeth as well as behind the molars.

About tooth tartar
It is hard to remove tooth tartar or dental calculus attached to the tooth surface just by a water jet, so a toothbrush is required to brush the teeth.
It is recommended to clean inside your mouth with the water jet after brushing your teeth.

About bleeding gums
Initially bleeding may occur even with healthy gums. This is caused because the gums are not used to such stimulation. The bleeding will normally stop within 1 or 2 weeks of use. There may be a problem with the gums (periodontal disease, etc.) if the bleeding continues for over 2 weeks. In such cases, stop using the appliance and consult a dentist.

After use

Please clean the appliance after each use.

To prevent the water from splashing about, turn off the power switch “ ” while keeping the nozzle in your mouth.
Empty the water tank and drain the remaining water in the main unit, for the sake of hygiene.
Open the water tank cap, and pour out the remaining water. Be sure to pour out the remaining water after each use.
Turn on the power switch ” drain the remaining water in the main unit.
Turn off the power switch “ when no more water comes out.
Remove the bottom cover, and wash the main body (as a whole) and inside of the tank.
Remove the nozzle while pressing the nozzle release button.
Remove the water tank from the main unit, and then take out the bottom cover. How to remove the bottom cover
Rotate the bottom cover until the ” ” mark on the water tank is aligned with the ” ” mark on the bottom cover.
Remove the bottom cover.
Clean it with water.
When draining, do not hit the appliance on the washbasin or the like.
Store it after it is dry.
Wipe away the water with a towel or the like and dry them in a well-ventilated shade.
Store the nozzle and the main unit.

  * Attach the bottom cover onto the water tank.
  * Do not get your fingers pinched in  on the nozzle  storage unit.

How to attach the bottom cover

Align the “ ” mark on the water tank with the ” ” mark on the bottom cover, and attach the bottom cover.
Rotate the bottom cover until the “ ” mark on the bottom cover is aligned with the ” ” mark on the water tank.
If the rubber ring of the bottom cover comes off
Keep the convex part of the rubber ring facing outward, and install the rubber ring onto the bottom cover.

Notes

Do not wash with lukewarm water exceeding 50 °C.
Use neutral kitchen detergent and rinse well with water to ensure no detergent remains after cleaning.
Never use thinners, benzine, or alcohol. (Doing so may cause malfunction, or cracking or discolouration of the parts.)
The water tank and the bottom cover can be washed in a dish washer.

When the water jet is poor
Remove the dirt from the filter (the tip of the suction hose).

Filter
Rub it gently with a soft brush.

Frequently asked questions

Troubleshooting

If the problems still cannot be solved, contact the store where you purchased the unit or a service centre authorized by Panasonic for repair.

Battery life
Approximately 3 years. The battery may have reached its operating life if the operating time decreases drastically, even after a full charge. (The operating life of the battery may differ depending on usage or storage conditions.)

Removing the built-in rechargeable battery
Remove the built-in rechargeable battery before disposing of the appliance.
The battery is to be disposed of safely.
Please make sure that the battery is disposed of at an officially designated location if there is one.
This figure must only be used when disposing of the appliance, and must not be used to repair it. If you dismantle the appliance yourself, it will no longer be waterproof, which may cause it to malfunction.

Remove the appliance from the adaptor, press the power switch to turn on the power and then keep the power on until the battery is completely discharged.
Use a screwdriver to perform steps 1 to 7 to disassemble the main unit and remove the battery.
Insulate the ⊕ and ⊖ terminals by applying tape to them. (To prevent short circuit of terminals).

For environmental protection and recycling of materials
This appliance contains a Lithium-ion battery. Please make sure that the battery is disposed of at an officially assigned location, if there is one in your country.

Specifications

Power source	See the name plate on the product (Automatic voltage conversion)
Charging time	Approx. 1 hour

Operating time

| LEVEL 4:

Approx. 10 minutes

(at 20 °C when fully charged)

Tank volume

| Approx. 150 mL

(for approx. 35 seconds of operation when the water pressure level is set to 4)

**** Dimensions| Approx. 30.9 cm (or 23.4 cm when the nozzle is not installed) (H) x

5.2 cm (W) x 5.7 cm (D)

In storage: Approx. 15.4 cm (H) x

5.2 cm (W) x 5.7 cm (D)

Mass| Main body: Approx. 240 g

(Including nozzle)

This product is intended for household use only.

Changing the nozzle (Sold separately)

Regular nozzle

If the tip of the nozzle gets deformed, please replace the nozzle with a new one.
The nozzle should be replaced once every 6 months or so due to hygiene reasons, even if it is not deformed.

Panasonic Corporation https://www.panasonic.com C Panasonic Corporation 2022
Printed in China EW9700DJ311451 S0722-0