Troubleshooting - Delta SMT150LED User Manual

TROUBLESHOOTING

PROBLEM
The fan is not turning on
The fan seems louder
than it should
The fan is not clearing
the room
Model: SMT130/SMT130H/SMT130M/SMT150/SMT150D/
SMT150LED
POSSIBLE CAUSE
1. Power off
2. Faulty switch
3. Faulty wire connection
1. CFM too great
2. Damper not working
properly or damaged
3. Bend in duct too close
to fan discharge
4. Fan discharge
reduced to fit smaller
duct
5. Fan body not securely
attached
1. Insufficient intake
airfow within room
2. Insufficient CFM
CORRECTIVE ACTION
1. Make sure power supply is on.
2. Test or replace switch.
3. Check wire in switch box.
1. Be sure the CFM rating on the fan matches the
size of your room.
2. Check damper to ensure it is opening and closing
properly. If the damper has become damaged,
please call Customer Service.
3. Be sure you do not have any sharp bends in duct
closer than 18 in. to the fan discharge.
4. Use recommended size ducting to reduce fan
noise.
5. Be sure the fan is securely attached to your ceiling
joists.
1. Be sure a door or window is slightly ajar or opened
to allow airflow. The fan is not able to draw air out
of the room without enough airflow to draw in from.
2. Be sure the CFM rating on the fan matches the
requirements for your room size.
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