Service; Troubleshooting - Thermador Pro Harmony PH36HWS Use And Care Manual

Service

Troubleshooting

Use the suggestions in the table below before calling for
service to avoid service charges.
Problem
Noise during operation
Noise when unit is off
Lights and fan blower do not
work
Fan blower does not work
Hood trips breaker
The hood is not venting properly •
Fault tone
Some noise is normal due to vibration 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.
• Backflow flap on outside of duct wall cap moves with the wind. This is normal.
• Hood circuit breaker may be tripped. Reset breaker.
• Power supply is insufficient.
• Electrical wiring is incorrectly connected.
See the Installation Manual for more information.
• Electrical wiring is incorrectly connected.
• Circuit is not sufficient.
See the Installation Manual for more information.
The hood may be too high from the cook top.
• The hood may not be centered above the cook top.
• Make up air not sufficient.
• The wind from opened windows or opened doors in the surrounding area is
affecting the ventilation of the hood. Close all the windows and doors to
eliminate the outside air flow.
• Blockage in the duct opening or ductwork. Remove all blockage from the duct-
work 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.
See the Installation Manual for more information.
• 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.
Suggested Cause and Solution
Page. 16