DISPENSE TROUBLESHOOTING INDEX. Hot Tank Descaling Instructions are included in this Troubleshooting section.

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1 DISPENSE TROUBLESHOOTING INDEX 1. No Flow of Water 2. Hot Water Flow but Cold Water is Not Flowing 3. Cold Water Flow but No Hot Water is Flowing 4. Low Flow of Water 5. Appears as white chunks in cup Hot Tank Descaling Instructions are included in this Troubleshooting section. 1. No Flow of Water Action Ensure that there is a water supply to the CUBE Water Treatment System from the building. If an anti leak has been installed in the CUBE Water Treatment System, verify that it has not tripped. Verify the water filters are not blocked, they are in date and are screwed securely into the filter head. The correct input water pressure is critical to the performance of the unit to allow solenoids to open. Check water pressure at the inlet bulkhead with a water pressure gauge. Additional method of verification is to turn off water to unit and press the dispense button. Does the solenoid open without water pressure to the unit? Listen for solenoid to activate, not button click. Adjust water pressure to psi. CUBE Manual Page 74 Revision

2 2. Hot Water Flow but Cold Water is Not Flowing Action Cold Water Tank Frozen. Disconnect power supply for one hour to allow the tank to defrost. Flush the cold water system. Verify the temperature settings are correct. If the cold tank is not frozen verify the solenoid valve is operating correctly and being turned on and off when you select the cold option. 3. Cold Water Flow but No Hot Water is Flowing Possible Reason Too much water pressure. Recommend 40 to 60 psi for the Cube Water Treatment System to operate properly. Solution The correct input water pressure is critical to the performance of the unit to allow solenoids to open. Check water pressure at the inlet bulkhead with a water pressure gauge. Additional method of verification is to turn off water to unit and press the dispense button. Does the solenoid open without water pressure to the unit? Listen for solenoid to activate, not button click. Adjust water pressure to psi. Calcium Build Up in the Hot Tank or the hot water outlet. Hot Solenoid Valve Descale the Hot Tank. Verify the hot water solenoid valve functions correctly and turns on and off when you select the hot option. CUBE Manual Page 75 Revision

3 4. Low Flow of Water Rated Service Flow is 1.89 Liters (0.5 gallons) per Minute Possible Reason Determine Flow of Water Feed Lines too small Elbows and turns in the feed line Filters Restrictions Booster Pump Solution Rated Flow Rate is 1.89 Liters (0.5 gallons) per minute. Check flow rate by dispensing into a container to measure for one minute and measure the amount of water that was dispensed. Feed lines can restrict flow if run long distances from the supply. It may be necessary to increase the supply line (e.g., use 3/8 feed line vs. ¼. Minimize elbows and turns in the feed line. Filters with high pressure drop due to fouling or just by design. Change filters more frequently or go to higher micron size filter for local water conditions. Follow flow path to ensure there are no undiscovered restrictions due to debris or malfunctioning valves, including the supply valve at the source. Add a booster pump to the supply line if the feed is slower than needed. 5. Appears as white chunks in water Possible Reason What appears as white chunks in cup is actually air bubbles caused during filter change. Solution Confirm by leaving cup sit overnight. Do bubbles dissipate? This will correct itself as the machine is used. CUBE Manual Page 76 Revision

4 HOT TANK DESCALING The Hot Tank requires removal of mineral deposits (descaling) on a regular basis, depending upon filtration and local water conditions. Descaling is an important process that removes calcium deposits, or scale, that can build up inside a tank over time. Calcium and scale is non toxic but left unattended, it will hinder your unit s performance. Hot Tank Troubleshooting: Hot water intermittently forced out through the faucet is an indicator that descaling is needed. This occurs when scale has deposited on the expansion slot inside the Hot Tank vent chamber and blocks the normal path for water to expand. Descaling should take place every 6 to 12 months to preserve the long term health of your unit. Use non toxic cleaner such as ScaleKleen, DEZCAL, 20% Citric Acid Solution, or Undiluted Vinegar Solution to remove mineral deposits as directed by the manufacturer. WARNING! PERSONAL PROTECTIVE EQUIPMENT REQUIRED. Always ensure proper ventilation and use rubber or nitrile gloves and eye protection when using chemicals. Refer to Material Safety Data Sheet for specific requirements of each product. CAUTION! STAINLESS STEEL TANK DESCALING. The Hot Tank is made from stainless steel. Ensure descaling solution is compatible with stainless and always flush the unit completely. Dispose in an environmentally safe manner. See Hot Tank Descaling Video and training procedure located on the Partner Area of the Waterlogic Website for more detailed instructions. Materials Needed: Personal Protective Equipment. Rubber or Nitrile Safety Gloves and Protective Eyewear Phillips Screwdriver Temperature Gauge Water Pitcher or Container to collect water from the faucet 5 gallon container or drain basin Citric Acid Based Cleaner ¼ Plastic Tubing, at least 4 feet in length, and assorted ¼ quick connect fittings Sanitizing Cartridge Food Coloring 37. Turn off the incoming water supply at the isolation point 38. Select the cold water icon and then select the Dispense Button, when the water stops flowing release the button. CUBE Manual Page 77 Revision

5 1. Switch off the Red Power and the Green Heater/Compressor Switches O=OFF at the rear of the machine and remove the power lead from the unit. 2. Use a Phillips head screwdriver to remove the two screws at the rear of the machine that secure the Top Cover if installed. 3. Remove the Top Cover by placing your hands on the Top, and push it towards the rear of the CUBE then lift to remove. 4. Next, remove the Filter closest to the front of the machine. Insert your finger into the round hole of the lever, and pull the lever up to the vertical position. 5. Pull the lever straight up to remove the filter assembly (some slight force may be required). Verify the filter removed is the 10 inch CBC filter. If the filter is labeled differently, call Technical Assistance. 6. Unscrew the filter body from the filter head by turning the base in a clockwise direction. 7. Pour away the excess water. CUBE Manual Page 78 Revision

6 8. Remove the Filter Cartridge from the filter head by turning the base in a clockwise direction. 9. Remove the Hot Drain Valve Cap at the back of the CUBE until all water has been removed. 10. Add Descaling Solution (minimum 2 ounces of descaling powder) to Empty Filter Body. 11. Screw the Filter Body to the filter head in a counter clockwise motion, it must be securely tightened. 12. d. Insert the Filter Assembly back into its cradle, aligning the two male ports with the female holes in the cradle e. Push it firmly until the Filter is securely in place and is flush with the cradle top surface. f. Lock the filter by closing the locking lever until it clicks into place. 13. Turn on the water supply at the isolation point CUBE Manual Page 79 Revision

7 14. Reconnect the power lead and insert it into the rear of the machine. Turn ON the Red Power Switch. I=ON 15. Place a container under the dispense area. Select the Hot Water Icon and then the Dispense button. Dispense 2 quarts of water. 16. Turn on Green Heater/Compressor Switch at rear of machine. I = ON 17. Leave the descale solution fluid to stand in the Hot Tank for 20 minutes. After 20 minutes, select the Hot Water Icon, select the Dispense button and flush 3 gallons of Hot water through the CUBE. 18. Turn off the water supply at the isolation point. 19. Select the Cold Water Icon, then the Dispense Button until no water dispenses from the CUBE. 20. Switch Off the Red Power and Green Heater/Compressor Switch at the rear of the machine. O=OFF 21. Remove the Power Lead from the unit. 22. Insert your finger into the round hole of the lever, and pull the lever up to the vertical position. NOTE: Make sure the front Filter with descaling solutions is the one removed. CUBE Manual Page 80 Revision

8 23. Pull the lever straight up to remove the filter assembly (some slight force may be required) 24. Unscrew the filter body from the filter head by turning the base in clockwise direction. 25. Pour away the excess water, ensure any remnants of decaling solution have been flushed. 26. Remove the Filter Cartridge from the filter head. 27. Screw the Filter Body to the Filter Head by turning the base in a counterclockwise direction. Ensure it is securely tightened. 28. Fit the Filter Assembly into the machine as follows: CUBE Manual Page 81 Revision

9 d. Insert the Filter Assembly back into its cradle, aligning the two male spigots with the female holes in the cradle e. Push it firmly until the Filter is securely in place and is flush with the cradle top surface. f. Lock the filter by closing the locking lever until it clicks into place. 29. Use a Phillips head screwdriver to reinstall the two screws at the rear of the machine that secure the Top Cover if screws were removed in Step Turn on the water supply at the isolation point. 31. Reconnect the power lead and insert it into the rear of the machine. Turn on the Red Power Switch I=ON 32. The Green Heater/Compressor switch can now be turned on. I=ON Allow the CUBE to heat and cool the water. 33. Clean the outside of the machine with the non abrasive anti bacterial wipe or cloth. 34. Taste the water one final time, if you detect hint of taste, flush 3 more gallons of water through the Hot Tank. CUBE Manual Page 82 Revision

10 WARNING! HOT WATER HAZARD. Unit Produces Very Hot Water and Steam. Always use insulated and chemically compatible containers and let unit cool down before draining the Hot Tank to avoid injury. CAUTION! REPLACE HOT TANK EVERY 3 5 YEARS. The Hot Tank and its controls should be replaced a minimum of every three to five years to ensure efficient operation. WARNING! REINSTALL ALL PANELS AND COVERS. Always reinstall all panels, protective covers, and fasteners after servicing equipment. Failure to do so could result in severe personal injury and will void the certifications and warranty of the equipment. CUBE Manual Page 83 Revision