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Chapter 5 - Troubleshooting, Page 5-4______________________________________________________
Exhaust Fan – Cont.
Symptom
Probable Cause
Corrective Action
1
If the
START FAN
button is pushed and
air is not being
pulled through the
Ventilator but you
can hear the fan
running.
A.
Baffle #1 (the damper) closes each
time the
START WASH
button is
pushed. The damper may not be re-
opening when the
START FAN
button
is pushed. (N/A on CG3-UVi-FDD,
CG3-UVi-FDT, and CG3-UVi-ND).
1
Push the
START FAN
button
and
observe the damper. If the damper
does not move to exhaust position
then there is either a mechanical or
electrical malfunction. Refer to
page 6-42 for instructions on
corrective action.
B.
For Models CG3-UVi-FDD and CG3-
UVi-FDT (Fire Damper in the duct
collar) the damper may have closed.
1
Shut off electrical power at the
Command Center. Open the ESP
Access Door.
Caution:
Before
proceeding conduct the “Standard
Safety Voltage Test” as described
on Page 4-5. Then, remove the ESP
Cell closest to the exhaust duct
collar, typically in the middle of the
Ventilator. Check to see if the
damper is closed.
B.
Fan drive belt is slipping or broken.
1
Tighten the belt or replace and
then measure exhaust volume to
verify. Refer to instructions on
measuring exhaust volume
beginning on page 6-1.
C.
Fan is running in reverse.
1
Contact electrical contractor to
wire correctly.
Table T-5-4-1