Bosch HUI80553UC Use and Care Manual - Page 16

TROUBLESHOOTING You can often easily eliminate issues that may occur on your own. Before calling customer service, take into account the following information. WARNING: RISK OF ELECTRIC SHOCK Improper repairs are dangerous. Only an authorized servicer provider may perform repairs and may replace damaged connecting leads. Remove the fuse or deactivate the breaker in the fuse box or breaker box if the appliance is damaged. Call Customer Service. Disruption Possible Cause and Solution Noise during Some noise is normal due to vibration operation and air movement. • Excessive noise could indicate one of the following: -- ductwork is too small / undersized -- ductwork is too large / oversized -- ductwork is loose -- transition is too small or is loose -- wood screws are not fully tightened -- loose screws in trim parts, etc. Check installation manual to verify that ductwork is the proper size. Tighten screws. Noise when • Backflow flap on outside of duct wall cap unit is off. moves with the wind. This is normal. Lights and fan • Hood circuit breaker may be tripped. blower do not Reset breaker. work Fan blower does not work. • Power supply is insufficient. • Electrical wiring is incorrectly connected. See the installation manual for more information. Hood trips breaker. • Electrical wiring is incorrectly connected. • Circuit is not sufficient. Disruption The hood is not venting properly Fault tone Lighting not working. Possible Cause Solution • The hood may be too high above the cooktop. • The hood may not be centered above the cooktop. • Make up air not sufficient. • The wind from opened windows in the surrounding area is affecting the ventilation of the hood. Close all the windows to eliminate the outside air flow. • Blockage in the duct opening or ductwork. Remove all blockage from the ductwork or duct opening. • Duct length too long, too many elbows, "back to back" elbows, or too small roof or wall cap, will all cause issues with air draw. • Two short beeps will sound whenever the pressing of a button by the user results in a possible function that is not possible by the system. The beep tone can be disabled by pressing the FILTER and LIGHTS buttons simultaneously for at least 3 seconds. Pressing the FILTER and LIGHTS buttons simultaneously when the beep sound is turned off will turn on the beep sound. LED lighting module have failed The LED modules are replaceable by an authorized service provider only. See the support contact information in Customer Service section. English 16