FloAire PCU Filtration - Manual (Page 18)

18
Troubleshooting
The following table lists causes and corrective actions for possible problems with the pollution control
units and the fan attached to the PCU. Review this list prior to consulting manufacturer.
Troubleshooting Chart
Problem Potential Cause Corrective Action
Fan Motor Overload / Excessive
Airflow
Filters not installed Install all filters and unit doors
Fan speed is too high Reduce fan RPM
Motor wired incorrectly Check motor wiring to wiring
diagram located on fan motor
Overload in starter set too low Set overload to motor FLA value
Motor HP too low Determine if HP is sufficient for job
Duct static pressure lower than design Reduce fan RPM
Insufficient Airflow Fan rotating in the wrong direction Be sure fan is rotating in the
direction shown on rotation label
Poor outlet conditions There should be a straight clear duct
at the outlet
Duct static pressure higher than design Improve ductwork to eliminate or
reduce duct losses
Blower speed too low Increase fan RPM. Do not overload
motor
Dirty or clogged filters Clean and/or replace
Belt slippage Adjust belt tension
Excessive Vibration and Noise Misaligned pulleys Align pulleys
Damaged or unbalanced wheel Replace wheel
Fan is operating in the unstable region
of the fan curve
Refer to performance curve for fan
Bearings need lubrication or
replacement
Lubricate or replace
Fan speed is too high Reduce fan RPM
Belts too loose, worn or oily Inspect and replace if needed
Check PCU filter light is ON Air Pressure Switch Option
Clean and/ or replace filters Dirty or clogged filters
Switch set incorrectly Set switch to .15” w.c. above internal
pressure of clean PCU
Internal static pressure is higher than
estimated
Increase switch setting by .1” w.c.
Advanced Filter Monitoring Option
See Page 12 for details Fault shown on HMI screen
Check PCU light does NOT come
on
Light is burned out Check light with jumper wire, check
related wiring, replace/ repair if
needed
Switch is set incorrectly Set switch to .15” w.c. above internal
pressure of clean PCU
Internal static pressure is lower than
estimated
Decrease switch setting by .1” w.c.
Fan and Cooking Equipment will
not operate
PCU Missing Door
See page 12 for details
PCU Missing Filters
PCU Filters Clogged for 72 hours
Sounding of Audible Alarm PCU filters clogged for 24 hours Replace Clogged filters with clean
filters of same type
Smoke/Odor leaking from PCU Exhaust fan installed before PCU Move exhaust fan to discharge side
of the PCU