User Manual - CP-U011W en – CUCKOO America
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User Manual

CP-U011W

CP-U011W User Manual

Part Names and Descriptions

Part Names

Part names — Front: Control Panel, Outlet, Water Tray Cover, Water Tray, Filter Replacement Cover. Rear: Tap Water Lock Valve, Tap Water Connector, Power Cord, Cooking Water Outlet

Control Panel

Control panel — Dispense Button, Non-Stop Dispense Button, One-Cup Dispense Button, Lock Button
  1. 1

    Dispense Button

    • For manual dispensing of water.
  2. 2

    Non-Stop Dispense Button

    • For continuous dispensing of water.
  3. 3

    One‑Cup Dispense Button

    • For dispensing approximately one cup of water.
  4. 4

    Lock Button

    • Used to enable or disable the lock function. (Press and hold the button for 2 seconds to turn the lock function on or off.)

Accessories

Accessories — User Manual, Maintenance Card, Installation Guide, Additional installation materials

The Benefits of CUCKOO

Dear users, thank you for choosing the CUCKOO Water Purifier. Please keep the User Manual (and the warranty certificate) in a safe place. it will be of great help when you have questions during use or when certain features do not work properly.

  • 3-layer filtering systemThe CUCKOO water purifier’s 3‑layer filtration system provides clean, great‑tasting filtered water for everyday use.
  • Economic & Eco-friendly PurificationThe electrostatic‑powered (positively charged) filters are designed to provide efficient filtration while helping you use water more efficiently.
  • Status Indicator LightsAllow the user to see the product’s operational status at a glance.
  • Stylish DesignThe slim, stylish body naturally blends into any space.
  • Lock ButtonThe Lock Button function prevents malfunctions that may be caused by children or those who are not familiar with the product.
  • Tank-free Direct PurificationProvides fresh water without an additional storage tank.
  • Tap Water Lock Valve ApplicationWhen replacing the filter, a tap water lock valve is applied to block the water supply, allowing for safer and more convenient filter replacement.

Safety Warnings

  • Please read and follow these safety warnings to help ensure safe use of the product and reduce the risk of injury or property damage.
  • This safety information includes both “Warnings” and “Cautions,” which are defined as follows:
Safety Symbol Definitions
Symbol Type Description
Warning A potentially dangerous situation that may result in serious injury or death if not averted.
Caution A potentially dangerous situation that may result in minor injury if not averted.
Triangle Alert Icon This symbol indicates a potential risk under certain conditions. Always read the instructions carefully and use the product as directed to help ensure safe operation.
Prohibited This symbol indicates prohibited actions.
Instructions This symbol indicates that a specific action is required.

Regarding Power

Regarding Installation

Warning — Instructions

Safety Precautions

Caution — Instructions

Caution — Prohibited

Pipe Diagram / Purification System

Water Purification Pipe Diagram

Water purification pipe diagram — Tap Water flows through the Pressure Reducing Valve and Ball Valve (Tap water shut-off valve) to the Sediment 3.0 Filter, Carbon Composite Filter and Nano Positive Plus 3.0 Filter, then to Room Temperature Water and Cooking Water (When installing cooking water valve)

Water Purification System

This filter is tested and certified by WQA against NSF/ANSI/CAN 372.

Water purification system — Stage 1: Sediment 3.0 Filter, Step 2: Carbon Composite Filter, Step 3: Nano Positive Plus 3.0 Filter
  1. Stage 1 : Sediment 3.0 Filter
  2. Step 2 : Carbon Composite Filter
  3. Step 3 : Nano Positive Plus 3.0 Filter

※ Using a non-genuine filter or using a genuine filter beyond its recommended lifespan may reduce filtration performance.

Read Before Installation

Cautions Regarding Installation Location

  1. Keep the product away from direct sunlight and heating appliances.
    • Failure to do so may result in fire or discoloration of the product.
  2. Make sure the installation area meets the following requirements.
    • For the convenience of filter replacement, ensure a distance of at least 20 cm from the wall and install the water supply hose in a location where the length of the water supply hose is less than 5 m from the tap water supply valve.
  3. Refrain from installing in areas exposed to moisture, dust, or water splashes.
    • Failure to do so may result in a product malfunction.
  4. Refrain from installing on a bumpy, sloping, or soft surface.
    • Failure to do so may result in product instability, which could cause fire or product damage.
  5. Refrain from installing where the temperature may drop below 0°C (32°F).
    • This product is intended for indoor use. Installing it in locations where the temperature falls below 0 °C (32 °F) may cause the filters or internal parts to freeze, resulting in product malfunction.
  6. The water purifier must be installed in a clean place.
    • Do not install it in areas prone to water contamination or in contaminated areas.

Cautions Regarding Moving the Product

Use caution when moving the product.

  • Do not tilt the product more than 45 degrees when moving it.
  • After moving the product and supplying water, wait about 30 minutes before plugging in the power cord.

Cautions Regarding Connecting Pipes

Connect the product to the cold-water pipe.

  • Connecting the product to a hot‑water pipe may damage the filters and cause product malfunction.
  • For more information on connecting hoses, please refer to “How to Install”.

How to Install

Installation diagram — (1) Tap Water Supply Valve on the Cold Water Pipe: Closed, (2) Tap Water Supply Hose to the Tap Water Connector, (3) Open the valve, (4) Tap Water Lock Valve: Closed / Open, (5) Plug into the wall outlet
  1. Keep the tap water supply valve closed during installation.

    • Caution

      • Keep the tap water supply valve closed during installation.
      • Make sure it is connected to the cold‑water pipe. Connecting it to a hot‑water pipe may damage the filters or cause product malfunction.
  2. Connect the tap water supply hose to the tap water inlet at the back of the product.

    • Caution

      • Make sure it is properly connected to the tap water inlet. (Apply force until you hear a squish.)
  3. Turn open the tap water supply valve.
  4. After installation, check for any leaks from the hose connectors.
    • Tap water supply valve (Hose)
    • Tap Water Connector
    • Filter Joints
  5. Connect the power plug to a wall outlet.

※ The water purifier must be used with tap water only. Do not use this product to purify groundwater or any other non‑tap water.

Read Before Use

  1. Turn the tap water supply valve to the open position.
    • Open the water tap to check the water supply before opening the tap water supply valve.
  2. Open the tap water shut‑off valve.
  3. Connect the power.
    • This product is designed for 120V~/60 Hz only. It must be connected to a dedicated outlet.
    • Once you’ve checked the water supply, turn on the power.
  4. After installation, dispense water for at least 10 minutes before using the product.
    • When reusing after a long period of non-use, make sure to drain the water for at least 10 minutes before use.
    • After replacing the filter, use the Non‑Stop Dispense function about 10 times before use.
  5. Periodically empty and clean the water tray.

How to Use

TIP — Standby modes

Standby modes
Mode Description
Standby mode The status in which the product is plugged in but is yet to be operated. The Dispense light will turn on in this mode.
Non-Stop Dispense Standby mode The product will enter this mode if the Non-Stop Dispense button is pressed while it’s in Standby mode. The Non-Stop Dispense light will turn on, and the Dispense light will flash.
One‑Cup Dispense standby mode The product enters this mode when the One‑Cup Dispense button is pressed while it is in Standby mode. The One‑Cup Dispense light will turn on and the dispense light will flash.
  1. Manual Dispense Function
    • This function allows you to dispense purified water manually.
    • Press the Dispense button in Standby mode to dispense purified water.
    • ☞ Dispensing will continue only while the Dispense button is pressed.
    • ☞ If you press the Dispense button for more than 30 seconds, water dispensing will stop. If you release your hand and press it again, water dispensing will resume.
  2. Non-Stop Dispense (The dispensed amount may vary by water pressure.)
    • This function allows you to dispense purified water continuously.
    • Press the Non-Stop Dispense button in standby mode to enter Non-Stop Dispense standby mode, then press the Dispense button to dispense water continuously.
    • ☞ The product will switch to Standby mode if there is no input within 3 seconds of entering Non-Stop Dispense Standby mode.
    • ☞ Press Non-Stop Dispense button to stop dispensing during Non-Stop Dispense.
    • ☞ The default dispensing time set for Non-Stop Dispense is 1 minute. Please refer to “Dispensing Time Settings” for setting instructions.
  3. One‑Cup Dispense (The dispensed amount may vary depending on the water pressure.)
    • This function allows you to dispense approximately a cup of purified water.
    • Press the One-Cup Dispense button in standby mode to enter One-Cup Dispense standby mode, then press the Dispense button to dispense water continuously.
    • ☞ The product will switch to Standby mode if there is no input within 7 seconds of entering One-Cup Dispense Standby mode.
    • ☞ Press any button to stop dispensing during One-Cup Dispense.
    • ☞ The default amount of water for One‑Cup Dispense is about 8.5 fl oz. For details on changing this setting, refer to “Dispensing Time Settings”.
  4. Lock Button Function
    • This function allows you to set the button lock (LOCK) to prevent malfunction due to cleaning or child operation.
    • Press and hold the Lock button for 2 seconds in standby mode to lock the buttons. The button lock will be set and the LOCK LED will light up.
    • When the button lock is set, press and hold the Lock button for 2 seconds to unlock the buttons. The LOCK LED will turn off.

Dispensing Time Settings

Setting the Dispensing Time for Non-Stop Dispense

  1. In Standby mode, press and hold the Non-Stop Dispense button for 10 seconds to enter Non-Stop Dispense Time Settings mode.
  2. The Non-Stop Dispense LED will blink according to the set time. (The initial setting is 60 seconds.)
  3. Press the Dispense button to select the desired dispensing time for Non-Stop Dispense (30 to 80 seconds).
Non-Stop Dispensing Time Setting
Step Non-Stop Dispensing Time Setting Indicator
1 30 seconds The Non-Stop Dispense LED blinks 3 times at 0.3 second intervals and then turns off for 1 second.
2 40 seconds The Non-Stop Dispense LED blinks 4 times at 0.3 second intervals and then turns off for 1 second.
3 50 seconds The Non-Stop Dispense LED blinks 5 times at 0.3 second intervals and then turns off for 1 second.
4 60 seconds (default) The Non-Stop Dispense LED blinks 6 times at 0.3 second intervals and then turns off for 1 second.
5 70 seconds The Non-Stop Dispense LED blinks 7 times at 0.3 second intervals and then turns off for 1 second.
6 80 seconds The Non-Stop Dispense LED blinks 8 times at 0.3 second intervals and then turns off for 1 second.
  1. Select the desired Non-Stop Dispense time, then press the Non-Stop Dispense button.
    • ☞ Pressing buttons other than Dispense and Non-Stop Dispense will cancel the function and start Standby mode.
    • ☞ If no input is made within 20 seconds of entering Non-Stop Dispense Time Settings mode, the function will be cancelled, and the product will return to Standby mode.

Setting the Dispensing Time for One-Cup Dispense

  1. In Standby mode, press and hold the One-Cup Dispense button for 10 seconds to enter One-Cup Dispense Time Settings mode.
  2. The One‑Cup Dispense LED will blink according to the currently set time. (The initial setting is 7 seconds.)
  3. Press the Dispense button to select the desired dispensing time for One-Cup Dispense (4 to 9 seconds).
One-Cup Dispensing Time Setting
Step One-Cup Dispensing Time Setting Indicator
1 4 seconds The One-Cup Dispense LED blinks 4 times at 0.3 second intervals and then turns off for 1 second.
2 5 seconds The One-Cup Dispense LED blinks 5 times at 0.3 second intervals and then turns off for 1 second.
3 6 seconds The One-Cup Dispense LED blinks 6 times at 0.3 second intervals and then turns off for 1 second.
4 7 seconds (default) The One-Cup Dispense LED blinks 7 times at 0.3 second intervals and then turns off for 1 second.
5 8 seconds The One-Cup Dispense LED blinks 8 times at 0.3 second intervals and then turns off for 1 second.
6 9 seconds The One-Cup Dispense LED blinks 9 times at 0.3 second intervals and then turns off for 1 second.
  1. Select the desired amount of water for One‑Cup Dispense, then press the Non‑Stop Dispense button.
    • ☞ Pressing any button other than Dispense or Non‑Stop Dispense will cancel the function and start Standby mode.
    • ☞ If no input is made within 20 seconds after entering the One‑Cup Dispense time‑setting mode, the function will be canceled and the product will return to Standby mode.

Cleaning Instructions

  1. First, close the tap water supply valve.
  2. For safety, make sure to unplug the product.
  3. After wiping off any foreign substances with a neutral detergent, wipe the product with a dry cloth.

Cleaning the Water Tray

  1. Removing the drain dish
    • Hold the water tray and pull it up to detach it from the product.
  2. Removing the water tray grill
    • After removing the water tray, lift the grill by the top hole to detach it.
  3. Cleaning the water tray.
    • Throw away the collected water and wipe off any remaining moisture with a soft cloth.
  4. Assembling the water tray.
    • Reassemble the cleaned water tray in reverse order of disassembly.

Detaching and Cleaning the Faucet

  1. Rotate the dispensing outlet (faucet) clockwise to detach it.
  2. Once the faucet is detached, wipe the inner tip with a clean cloth.
  3. Wash the detached faucet thoroughly under running water.
    • (You can wipe the hard‑to‑reach areas inside the faucet with a cotton swab.)
  4. Remove any remaining moisture from the faucet with a clean cloth.
  5. Reattach the faucet by rotating it counterclockwise.

Filter Replacement

(Always use genuine CUCKOO filters)

  1. Turn the tap water lock valve to the CLOSE position as shown in the image.
    • Since the tap water supply is cut off, purified water will not come out of the cooking water outlet while the filter is being replaced. (The cooking water outlet can be used again after the tap water supply is restored.)
  2. Release any remaining water by pressing the Dispense button.
  3. Unplug the power cord.
  4. Remove the filter replacement cover on the right side of the product.
    • "+" screwdriver is required.
  5. Lift the filter to be replaced, then pull it out to remove it. (Be careful, as any remaining water may come out. This water is released from the filter and is not a leak from the product.)
  6. Insert the new filter as shown in the image, then push it into the filter case until it is fully connected.
    • The filter’s label should face the front.
    • Check that the filters are properly installed in the filter case.
  7. Return the tap water lock valve to its original position as shown in the image to allow water to flow.
    • After completing the filter replacement, return the tap water lock valve to its original position and use a dry cloth to check for any leaks.
  8. Reattach the filter replacement cover on the right side of the product and tighten the screw to secure it.
    • "+" screwdriver is required.
  9. Wipe any moisture off your hands with a dry towel, then plug in the power cord.
  10. Press the Non‑Stop Dispense button to dispense water until the flow stops. Repeat this step 10 times. (Water containing microbubbles may come out as part of the filter stabilization process.)
  11. Before using the product, please wait around 25 minutes for the filter to stabilize. If the product is used before 25 minutes have passed, you may hear a popping sound caused by air bubbles in the filter and internal pipes.

Filter Replacement Cycle

  • The following filter replacement cycles presume 10 L of daily household water usage and may vary by tap water conditions.
Recommended Filter Replacement Cycle
Filter Name Estimated Replacement Cycle
Sediment 3.0 Filter 4 months
Carbon Composite Filter 4 months
Nano Positive Plus 3.0 Filter 8 months

Recommendations

  • Effective Purification Capacity
    It refers to the minimum treatment capacity during which the filter helps reduce impurities and maintain water quality without cleaning, regenerating, or replacing the filter.
  • Filter Replacement Cycle
    The filter replacement cycle indicates the expected lifespan during which the filter is designed to perform effectively. The cycle is calculated based on an average daily tap water usage of approximately 10 L (about 2.6 gallons). If water usage is higher, the replacement cycle may be shorter.

Filter Layout Diagram

Filter layout diagram — Level 1: Sediment 3.0 Filter, Level 2: Carbon Composite Filter, Level 3: Nano Positive Plus 3.0 Filter

Read Before Requesting Support

▼ The product may not operate properly if it is not used in accordance with this manual. If you experience a problem, refer to the troubleshooting guide below. If the issue persists, contact Customer Support.

Troubleshooting
Issue What to Check What to Do
The water tastes or smells unpleasant. • Has the water purifier been left unused for a long time? • Run water for about 10 minutes before use
• Do the filters require replacement? • Replace the filters with genuine CUCKOO filters.
Water is not being dispensed. • Is there an issue with the tap water supply? • Open the tap water supply valve.
• Check whether the water supply hose is bent or kinked
• Check if the water supply has been cut off.
The purification volume has suddenly decreased. • Is the tap water lock valve closed? • Open the tap water lock valve.
• Has the filter replacement cycle passed? • Replace the filters with genuine CUCKOO filters. (The dispensed amount may vary by water pressure.)
The product makes excessive noise. • Is the product installed on an even surface? • Place the product on a flat, stable surface.
• Is the product in contact with other objects? • Make sure it is not in contact with other objects.
• Do you hear the noise after dispensing water from the faucet? • Because the product is directly connected to tap water, it may produce noise while the filters refill. This is a normal part of the purification process.
Nothing happens when the button is pressed. • Was the Dispense button pressed for more than 30 seconds? • To prevent unintended operation, the product automatically disables input if the Dispense button is held for more than 30 seconds.
• Release the Dispense button and press it again.
• If the red LED on the Lock indicator is on? • If the red LED on the Lock indicator is turned on, the Lock button is activated. Press and hold the [Lock] button for more than 2 seconds to disable the Lock button function. (Refer to ‘Lock Button Function’ in “How to Use”)
Particles are visible in the water. • Has the filter replacement cycle passed? • Replace the filters with genuine CUCKOO replacement filters
Water is leaking from the water purifier. • Is the humidity too high in the house or the outside environment? • Condensation may occur when the cold air inside the water purifier comes into contact with moisture, similar to condensation forming on the outside of a glass

Product Specifications

Product Specifications
Product Name CUCKOO Water Purifier
Model Name CP-U011W
Rated Voltage Single-phase current, 120 V~, 60 Hz
Power Consumption 14W
Purification Method Multi-stage filtration system
Filter Specifications Sediment 3.0 Filter
Carbon Composite Filter
Nano Positive Plus 3.0 Filter
Filter Capacity 2,400L
Installation Location Indoor use only
Weight Approx. 3.6 kg (7.9 lb)
Dimensions 124 × 353 × 360 mm (4.9 × 13.9 × 14.2 in)
Rated Operating Pressure 0.15–0.69 MPa (22–100 psi)

※ Details in this User Manual, such as exterior, design, and specification information, may change without notice to improve the product’s quality.

※ This device is designed for a household (Class B) electromagnetic environment. It is primarily intended to be used in all household areas.

※ Manufacturer: CUCKOO HOMESYS Co., Ltd.

CUCKOO

We provide satisfying consultation and services concerning your complaints, suggestions, and recommendations upon receiving your troubled product model name, status, and contact information.
www.cuckooamerica.com

  • After reading this manual, keep it in a place easily accessible to the user for future reference.
  • This manual includes the warranty.
  • Caution: Please read this manual carefully to ensure safety and a longer product lifespan.

This CP-U011W is tested and Certified by WQA against NSF/ANSI/CAN 372

Document Number
00383-0895G0 Rev.1
© CUCKOO · CP-U011W · English User Manual
© 2026 CUCKOO America. 
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