W
ESTEEL
- A
XIAL
F
LOW
A
ERATION
F
AN
6. T
ROUBLESHOOTING
3HP, 5HP, 7HP, 10HP, & 15HP
198941
21
6. Troubleshooting
F
AN
R
ELATED
P
ROBLEMS
1. PROBLEM:
Fan does not run.
2. PROBLEM: Fan runs for a short time then shuts off.
3. PROBLEM: Fan makes ticking sound.
4. PROBLEM: Fan vibrates excessively.
Cause
Solution
Blown fuse / tripped breaker
Replace fuse or reset breaker
No power at fan
Turn power on at source
Defective wiring/connection
Follow wiring diagram and check for broken wires
and loose connections
Incorrect wire size
Refer to wire sizing charts for correct size
Defective motor
Replace if necessary
Defective magnetic starter
Check contactor for proper function
Cause
Solution
Undersize wiring
Refer to wire sizing charts for correct size
Low line voltage at fan
If wire size is correct, call power company
Internal overload tripped
Let motor cool off then retry; if symptoms persist,
check amperage draw; if high, correct, if not,
thermal overload could be tripping out at incor-
rect temperature
Undersize wiring
Refer to wire sizing charts for correct size
Low line voltage at fan
If wire size is correct, call power company
Defective magnetic contactor
Replace contactor
Defective start/stop switch
Replace switch
Cause
Solution
Fan impellor rubbing housing
Turn off power to fan; rotate impellor slowly to see
if impellor is rubbing the housing, if so, adjust
motor positioning to obtain equal clearance all
around the impellor
Motor bearing defective
Replace bearing
Cause
Solution
Fan not level
Level fan -- See Installation Section.
Dirt buildup on impellor
Clean blade
Bent motor shaft
Replace motor
Improperly mounted impellor
Position impellor correctly
Impellor out of balance
Replace or have impellor rebalanced
