Greenheck MSX (470658) - Manual (Page 29)

29 Modular Supply Make-Up Air Unit
®
Troubleshooting
Too Much Airflow
Blower speed too high?
Adjust drives as needed.
(Reference Blower Start-Up Step #5)
Insufficient external static
pressure?
Increase external static pressure.
Filters not in place?
Install filters.
Yes
Yes
Yes
No
No
Everything is working properly,
consult factory.
No
Insufficient Airflow
Damper(s) not fully opened?
Filters dirty or clogged
Blower speed too low?
System static losses too high?
Yes
Yes
Yes
Yes
No
No
No
No
No
Leaks in ductwork
Yes
Belt slipping
Yes
Everything is working properly,
consult factory.
Yes
Adjust damper linkage(s), or replace faulty actuator(s).
(Damper actuators may take a few minutes to open)
Clean or replace filters.
(Reference Filter Maintenance in the Maintenance section).
Adjust drives as needed.
(Reference Blower Start-Up Step #5)
Reduce losses by improving ductwork.
Repair leaks.
Replace or tighten belt.
(Reference V-Belt Maintenance in the Maintenance section)