Zephyr ZML-M90BG Use, Care And Installation Manual page 18

TROUBLESHOOTING PROCEDURES FOR MILANO ISLAND
Issue Cause
After installation, 1. The power source is not turned ON.
the unit doesn't
work.
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.
Light works, 1. The motor is defective, possibly seized.
but motor is not
2. The thermally protected system detects if the
turning.
motor is too hot to operate and shuts the motor
down.
3. The switch board or control board is defective.
The unit is 1. The motor is not secure in place.
vibrating.
2. Damaged blower wheel.
3. The hood is not secured in place.
4. The switch board or control board is defective.
The motor is 1. Defective LED bulb.
working, but the
2. The LED bulb wire is loose.
lights are not.
The hood is 1. The hood might be hanging too high from the
not venting out cook top.
properly.
2. The wind from the opened windows or opened
doors in the surrounding area are affecting the
ventilation of the hood.
3. Blockage in the duct opening or ductwork.
4. The direction of duct opening is against the wind. 4. Adjust the duct opening direction.
5. Using the wrong size of ducting.
Mesh Filter is 1. Mesh fi lter is loose.
vibrating.
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What to do
1. Make sure the circuit breaker and the unit's
power is ON.
2. Check the power connection with the unit is
connected properly.
3. Make sure the wirings between the switch
board and control board are connected
properly.
4. Change the switch board or control board.
1. Change the motor.
2. The motor will function properly after the
thermally protected system cool down.
3. Change defective part.
1. Tighten the motor in place.
2. Replace the blower.
3. Check the installation of the hood.
4. Change defective part.
1. Change the LED bulb.
2. Connect the LED bulb wire.
1. Adjust the distance between the cook top and
the bottom of the hood within 26" and 34"
range.
2. Close all the windows and doors to eliminate
the outside wind fl ow.
3. Remove all the blocking from the duct work or
duct opening.
5. Change the ducting to at least 8" or higher for
the internal blower.
1. Make sure the metal clips in the handle are
not stuck. Or replace the mesh fi lter.
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