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COS-640STX-E Electrical Installation Troubleshooting – 120V

Gas range or cooktop No power or low power. Check that the unit is plugged in and the breaker is switched to ON. Check that the voltage is correct for your unit according to the installation manual – 110/120V, 60Hz, and 15 to 20 Amps. Turn the breaker to the OFF position and wait 5 minutes. Turn the breaker back to the ON position and attempt to use the unit again. We advise that electrical installation be performed by a qualified, licensed electrician. If installation was not performed by a licensed professional, contact one as soon as possible to verify that the power is adequate for your unit and has been safely connected.

Calibrate COS-640STX-E Cooktop Burners

Read all instructions carefully before beginning. Light two other burners and turn the control knob to medium. This will ensure the burner’s flame does not extinguish when other burners are turned on. Light the burner needing calibration and turn the control knob to the lowest setting. Remove the control knob. Insert a small, flat-head screwdriver into the adjustment screw or control knob valve stem, and slowly turn the screw until the flame appearance is correct. Open the valve more (counter-clockwise) if the flames are too small or fluttered, or the flame extinguishes entirely. Close the valve more (clockwise) if the flames are too large. Replace the control knob. Test the flame by turning the control from “LO” to “HI,” checking the flame at each setting. Repeat the above steps for each burner. 

COS-63ISS90 FAQ

Q: What if my question isn’t listed here? A: General FAQs Q: How do I set the time of day on my range hood? A: To set the clock on your range hood (digital units only):  Hold the timer button for 3 seconds. Use the light button to set minutes. Use the fan speed button to set the hours. Once the time is set to the correct time of day, press the timer button again to complete. Allow the unit to sit for 5 seconds without using any controls for the clock to finish setting. Q: How do I set a shut-off timer on my range hood? A: To set the shut-off timer on your range hood (digital units only): Turn the fan on and set to the desired speed. Press the timer button. Continue pressing the timer button until the desired shut-off time is displayed. After setting the timer, allow the unit to sit for 5 seconds without using any controls for the timer to finish setting.  The fan will shut off automatically when the timer ends. Q: Why does my power button flash when I press it while the fan is on? A: Pressing the power button a single time while the fan is running activates a 60-second auto-shutoff timer. To cancel the timer and shut the fan off immediately, simply press the power button a second time.  Q: How do I change my clock to/from a 24h format? A: Your range hood does not have the ability to change time formats.  Q: How do I convert my unit to ductless? A: To convert your unit to a ductless operation and recirculate the air back into the room: Purchase the necessary carbon filter kit found online at www.cosmoappliances.com/product-category/parts-and-accessories/range-hood-parts/filters/. This filter is not included with your purchase and must be purchased separately, unless you purchased a unit with the suffix “-DL” after your model number. Remove the stainless baffle filters on your range hood. Install the carbon filters by pressing them against the motor, one at a time, and twisting clockwise. They will create a tight seal. For island mount range hoods: Ensure that the slotted holes  on the upper chimney cover are exposed. The air will recirculate back into the room through these holes. Q: How do I separate my chimney covers in half for installation? A: Your chimney covers do not separate and will need to be installed with that in mind. The minimum height of the unit is 30.75”, accounting for this fact.

COS-63ISS90 Controls Troubleshooting

The controls are not responding, only respond sometimes, or are responding but will not turn on the fan or lights. Check that the unit is plugged into a grounded outlet and that the outlet has been tested for a 120V, 60Hz power source. Reset the control panels: Unplug the unit. Remove the baffle filters and set them aside. Unplug and remove the lights by disconnecting their power cord and pushing from behind. Locate and remove the screws found behind the panels housing the lights. Set these aside. Remove the lighting panels. Locate the control wiring directly behind each control panel. Unplug the controls and wait 5 minutes. Reconnect each control panel. Reinstall the lighting panel, screws, and lights. Plug the unit back in.  If the controls are still not responding, contact support for replacement parts such as the control panel, circuit board, or wiring. The clock does not match on each side of the range hood. Check that the unit is plugged into a grounded outlet and that the outlet has been tested for a 120V, 60Hz power source. Reset the control panels: Unplug the unit. Remove the baffle filters and set them aside. Unplug and remove the lights by disconnecting their power cord and pushing from behind. Locate and remove the screws found behind the panels housing the lights. Set these aside. Remove the lighting panels. Locate the control wiring directly behind each control panel. Unplug the controls and wait 5 minutes. Reconnect each control panel. Reinstall the lighting panel, screws, and lights. Plug the unit back in.  If the controls are still not responding, contact support for replacement parts such as the control panel, circuit board, or wiring. The remote is not working (if applicable): Check that the unit is plugged into a grounded outlet and that the outlet has been tested for a 120V, 60Hz power source. Check that the unit powers on by pressing the display and cycling through each control. Replace the remote’s battery. If the remote still does not function, contact support for a replacement.