Troubleshooting – COOK HMD EN User Manual
Page 12
12
Troubleshooting
Is the blower speed too
high?
Are the filters missing?
Is there insufficient
external pressure?
Yes
Yes
Yes
Adjust drive & decrease
external pressure. as needed.
Increase external static pressure.
Install filters.
Measure the unit’s air volume
(cfm) and compare it with its
rated air volume. If the measured
air volume is wrong, adjust the
fan’s RPM by changing/adjusting
the drive. The most accurate
way to measure the air volume
is by using a Pitot traverse
method downstream of the
blower. Changing the air volume
can significantly increase the
motor’s amps. If the air volume
is changed, the motor’s amps
must be checked to prevent
overloading the motor. To ensure
accuracy, the dampers are to be
open when measuring the air
volume.
Consult factory.
Too much airflow
No
No
No
Refer to the control panel parts list when troubleshooting.
- AC (12 pages)
- ACSC (8 pages)
- VA (12 pages)
- ASP (8 pages)
- Automatic Belt Tensioner Supplement I (2 pages)
- Automatic Belt Tensioner Supplement II (2 pages)
- CA (16 pages)
- CA-4 (1 page)
- CCP (8 pages)
- CFS (8 pages)
- CIC (12 pages)
- CPL (8 pages)
- CV (8 pages)
- Duct Blower (8 pages)
- EC Motor Wiring (1 page)
- Constant Pressure Control System (2 pages)
- Economizer Fan (8 pages)
- ERV (16 pages)
- ERV Evaporator Coil Supplement (2 pages)
- ERV Fluid Coil Supplement (2 pages)
- FCE (6 pages)
- FCP (8 pages)
- Gemini (8 pages)
- Gemini (1 page)
- GEMINI 100 SERIES PRE-2014 MOTOR (1 page)
- GEMINI 200, 300, & 500 PRE-2014 MOTOR (1 page)
- Gemini 100 Series (4 pages)
- Curtain Style Ceiling Radiation Damper (1 page)
- Gemini with Motion Sensor (2 pages)
- GI (4 pages)
- Hinged Base (2 pages)
- IMH (8 pages)
- Inlet Vane Damper (1 page)
- Laboratory Exhaust (17 pages)
- Laboratory Exhaust (4 pages)
- Laboratory Exhaust (18 pages)
- Power-Plume (4 pages)
- TCN (12 pages)
- QMX (12 pages)
- LC (8 pages)
- Lo-Pro (8 pages)
- Motor Pack (2 pages)
- Universal Motor Pack (2 pages)
- PR (2 pages)