AAF International AAF-CY44-50 - Manual (Page 14)

6.0 TROUBLESHOOTING
Problem Probable Cause Remedy
Motor will
not start Open circuit Check for fuse or circuit breaker fault.
Replace as necessary. Check starter
reset button.
Improper wire size Rewire using the correct wire gauge as
specified by national and local codes.
Motor leads not wired
correctly Check and correct motor lead wiring.
See motor wiring diagram on motor.
Motor not wired for
available voltage Correct motor leads for proper supply
voltage. A 10% differential is
permissible.
Motor runs
hot, starter
overload
trips Starter or supply voltage
connections loose Check all wiring connections for
tightness. Loose connections can
cause motor to single phase (getting
power on 2 legs only).
Duct work or dust drum
not installed or hopper
slide gate open If too much air reaches the fan, the
motor will overload. Correct condition.
Motor
whines
and is not
running at
full speed Motor is single phasing
(getting power on 2 legs
only) or motor leads
connected for wrong
voltage Check power lines at motor with amp
meter. Check motor connections.
Insufficient
airflow Motor wired for 460v
and power is 280v or
less Correct wiring for proper supply voltage.
A 10% differential is permissible.
Fan rotation backwards Proper fan rotation is clockwise when
looking down at the fan motor. A radial
fan running backwards will deliver only
50% of its rated air capacity.
Improper duct or hood
size Check and replace if necessary
Fan exhaust area
restricted Check fan exhaust area for
obstructions. Remove material or
debris.
Insufficient
airflow
(continued) Obstruction in duct Check and remove obstructions.
Filter bags clogged Check and clean or replace as
necessary.
Too many duct branches
have been added to The dust collector does not have the air
flow capacity for the additional branches
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