(OPERATION Continued)
TROUBLE SHOOTING
SYMPTOM
POSSIBLE CAUSE
REMEDY
Not enough airflow
Excessive airflow
Excess vibration / noise
“Check KAP” filter light on
(if installed with this option)
“Check KAP” light will not
turn on
(if installed with this option)
Smoke or odor from KAP
Fan rotating in wrong direction
Restricted outlet condition
Static pressure in duct too high
Blower speed too low
Dirty filters
Belt slipping
Missing filters
Fan speed too high
Motor incorrectly wired
Overload in starter set too low
Duct static pressure too low
Damaged / unbalanced wheel
Misaligned pulleys
Fan operating outside of stable fan
curve
Bearing lubrication needed
Fan speed too high
Worn or greased belts
Dirty / clogged filters
Incorrect switch setting
Internal static pressure higher than
estimated
Light is burned out
Switch is set incorrectly
Internal static pressure is lower
than estimated
Exhaust fan installed at wrong end
of KAP unit
Correct according to rotation label
Provide straight clear duct at outlet
Repair or reconfigure ductwork to reduce
losses
Increase fan RPM (do not overload)
Clean / replace
Adjust belt tension
Install all filters & doors
Reduce fan RPM
Conform to motor wiring diagram on fan
motor
Set overload to FLA. value
Reduce fan RPM
Replace wheel
Align pulleys
Adjust to performance curve
Lubricate or replace bearings
Reduce fan speed RPM
Inspect and replace as needed
Clean / replace filters
Set to .15” w.c. above internal pressure
Increase switch setting by .1” w.c.
Check light and related wiring with jump-
er wire / circuit tester; repair as needed
Set switch to .15” w.c. above internal
pressure (with clean unit)
Decrease switch setting by .1” w.c.
Relocate fan to the discharge end of
KAP unit
Pg. 11
