Thermador HMWN30 - Manual (Page 7)

Trouble Shooting
After installation, the
unit doesn’t work?
Light works, but motor
is not turning.
The unit is vibrating.
The motor is working,
but the lights are not.
The hood is not venting
out properly.
Metal filter is vibrating.
1. The power source is not turned ON.
2. The power line and the cable locking
connector is not connecting properly.
3. The switch board and control board
wirings are disconnected.
4. The switch board or control board is
defective.
1. The thermally protected system
detects if the motor is too hot to
operate and shuts the motor down.
1. The motor is not secure in place.
2. Damaged blower wheel.
3. The hood is not secured in place.
1. Defective halogen lights.
2. The halogen lamps is loose.
1. The hood might be hanging too high
from the cook top.
2. The wind from the opened windows
or opened doors in the surrounding
area are affecting the ventilation of
the hood.
3. Blocking in the duct opening or
ductwork.
4. The direction of duct opening is
against the wind.
5. Using the wrong size of ducting.
1. Metal filter is loose.
o d o t t a h W e s u a C e u s s I
1. Make sure the circuit breaker and the
unit’s power is ON.
2. Check the power connection when the
unit is connected properly.
3. Make sure the wirings between the
switch board and control board are
connected properly.
4. Call for Service
1. The motor will function properly after
the thermally protected system cools
down.
1. Tighten the motor in place.
2. Call for Service
3. Check the installation of the hood.
1. Change the halogen lights.
2. Tighten the halogen lamps.
1. Adjust the distance between the cook
top and the bottom of the hood within
30” and 36” range.
2. Close all the windows and doors to
eliminate the outside wind flow.
3. Remove all the blocking from the duct
work or duct opening.
4. Adjust the duct opening direction.
5. Change the ducting to at least 8” or
higher.
1. Secure properly the grease filter to the
grease tray.
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