· Please check if the green light is on, on the front panel. Otherwise, check if your power supply is in place or any damaged wires are. · You may have this symptom if full amount of cold water was consumed before you. For example, if 2 liters of cold water was dispensed at once, you need to wait at least 30 minutes to have next cups of cold water. · Please check if the baffle is in place, otherwise cold water will not be made. · The condenser(black steel grills on the back) has to be properly ventilated to run cooling cycle efficiently. Relocate the product at least 10 centimeter away from the wall, and, if necessary, vacuum the dust off from the condenser using soft brush. Make sure you unplug the power cord in advance. · If you have done measurements above and symptoms have not improve, adjust the cold water thermostat to lower the temperature setting, by turning the knob clockwise with a flat-headed screw driver.

· Please check if the green light is on, on the front panel. Otherwise, check if your power supply is in place or any damaged wires are. · You may have this symptom if full amount of cold water was consumed before you. For example, if 2 liters of cold water was dispensed at once, you need to wait at least 30 minutes to have next cups of cold water. · Please check if the baffle is in place, otherwise cold water will not be made. · The condenser(black steel grills on the back) has to be properly ventilated to run cooling cycle efficiently. Relocate the product at least 10 centimeter away from the wall, and, if necessary, vacuum the dust off from the condenser using soft brush. Make sure you unplug the power cord in advance. · If you have done measurements above and symptoms have not improve, adjust the cold water thermostat to lower the temperature setting, by turning the knob clockwise with a flat-headed screw driver.

You may switch the red tumbler switch(on the back of the cooler) to off position to turn off the heater, and the red light on the front indicating hot water is on will go off, too. · However, please be advised that, since the water in this condition is not recommended for drinking clean water when the heater has been off at least a few weeks, we recommend you to turn the heater on from time to time to maintain cleanliness of hot water tank.

· If water drips from the top of the product, the leaks in most case stem from cracks on the bottle(though this crack is invisible with bare eye). In this case, unload the cracked bottle, dispense about 2 liters from the cold water faucet and load the new bottle. · Under the condition where the daily temperature difference exceed 30 Celsius degree, expanded air in the bottle pushes water above the reservoir and result in leaks on the top. In this case, relocate the product to the place where daily temperature difference is not high. · If water dribbles from the faucet on the front or drain cap on the back, the screw may come loose or threads on it may be worn. You may replace them easily referring to User's Manual.

· When the bottle gets empty, hot water does not dispense at once, so please replace the bottle immediately. · If the ice ring presents excessively in the cold water tank, it may prevent water flow from flowing well. In this case, adjust the cold water thermostat on the back of the product to high temperature by turning the knob counter-clockwise with a flat-headed screw driver. · Air Check-valve inside the air filter may be wet and stick to the surface, prohibiting the air inflow and water outflow consequently. In this case, (when it's wet, dry the air filter first) shake the air filter a couple of times to seat air check-valve in place and reassemble to NSK.

This is sound of compressor running for cooling cycle. Refrigerators have very similar compressors as it does, and, compared to the refrigerator, it has much smaller size and quiter noise compressor.

It seems to be vibration noise with adjacent object. Move the adjacent object away from the product, and, if surface of the bottom not flat, relocate the product on a flat ground

This is sound of refrigerant flowing in the cooling cycle only heard when the compressor starts or stops running. Since this is the normal sound of this kind of refrigerating appliance, please rest assured that it is never something wrong.

Faucets are designed to be replaced simply, so you may purchase this part from the seller and replace with new one

NSK(Non spill kit) is designed to be replaced simply, so you may purchase this part from the seller and replace with new one.

The products are equipped with high temperature cut-off and electrical fuse so that it may eliminate the damage to the user's property, health and life. If you smell something burnt or burning, be sure to shut off the mains immediately and contact the seller you have purchased the product.

Unless the earth wire at the mains outlet is in place, minute electric current may present on the surface of the steel chassis. Please make sure that its power cord is plugged to the grounded outlet.

It depends mainly on consumption, but, for normal household of 4 family members, Hot & Cold model may electricity around 35kWh per month. (8 liter cold water, 5 liter hot water per day, 30days/month)

It may happen when electric appliance are used simultaneously especially which are equipped with heating elements such as Electric kettle, electric oven, dish washer, rice cooker or electric iron. Disconnect power source for a few minutes, and connect power again. If this problem persists, please consult with your seller that you have purchased the product.

Check if the power plug is connected to the outlet socket in a proper manner. Connect the power plug to the other outlet to see whether the mains are working fine. If all these measures are ineffective, please contact to the seller you have purchased the product.

You may follow simple instruction written in your manual sheet we provide. If you want it to be serviced, please contact the seller you have purchased the product.

You may follow simple instruction written in your manual sheet we provide. If you want it to be serviced, please contact the seller you have purchased the product.

You may follow simple instruction written in your manual sheet we provide. If you want it to be serviced, please contact the seller you have purchased the product.

Since there is high chance of being abundant mineral or contaminants in the source water, we recommend bottled water sealed from the factory rather than well water.

Please contact the seller who you have purchased the product. You may receive services such as purchasing, replacing and frequent maintenance from your suppliers.