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Fan Troubleshooting
Problem: One or more fans found by control but will not run.
1
Have all fault codes been acknowledged and reset on fan
control?
2
Is the control set to a speed greater than 0 and have the
fans been turned on via the control's power button?
3
Do fans operate as expected?
Everything is working properly.
Problem: One or more fans attempt to run, but do not rotate completely.
1
Are fan size and blade count set appropriately in the
control for all installed fans?
2
Rotate all fans by hand. Can fans rotate freely without any
audible rubbing, scraping, or grinding noise?
3
Do fans operate as expected?
Everything is working properly.
Problem: One or more fans run intermittently, but will not run consistently.
1
Have all fault codes been acknowledged and reset on fan
control?
2
Are line voltage measurements within +/- 10% of nominal
voltage across L1 and L2/N on supply power wiring?
3
Are resistance measurements between 500k Ohms and
Open across L1 and L2/N on power wiring? Are resistance
measurements Open across L1 and GND, and L2/N and
GND on power wiring?
4
Were fans and controls installed using only the provided
networking components (green shielded CAT-5e cables,
black shielded 3-way RJ45 splitters) or components that
comply with specifications on page 15?
5
Have all CAT-5e cable connections been unplugged and
reconnected to ensure that cables are fully seated (will
hear a "click" when fully seated)?
6
Are the Modbus addresses and biasing settings set as
shown on pages 16-18 for all fans?
7
Do fans operate as expected?
Everything is working properly.
®
Yes
No
One or more fans may have experienced a fault. Refer
to list of fault codes on page 26 for detailed descriptions.
Acknowledge and reset all faults, then cycle power to fans.
Fans will only operate when Op Status code is equal to 0.
Refer to instructions in the control manual for accessing Op
Status code.
Yes
No
Control is not sending a run command to fans. Set
speed to a value between 1-10 and press the control's
power button to turn fans on. Control will indicate that fans
are on by displaying a green power icon or stating "On".
Yes
No
Contact factory.
Yes
No
Incorrect torque/speed command to fans. Set fan size
and blade count using instructions in the control manual.
Fan size and blade count must be set to match physical
product.
Yes
No
Rubbing components on the fan hub and/or airfoils.
Correct any issues that are found.
Yes
No
Contact factory.
Yes
No
One or more fans may have experienced a fault. Refer
to list of fault codes on page 26 for detailed descriptions.
Acknowledge and reset all faults, then cycle power to fans.
Fans will only operate when Op Status code is equal to 0.
Refer to instructions in the control manual for accessing Op
Status code.
Yes
No
Phase imbalance or incorrect supply power applied to
fan. Correct supply power wiring to fan.
Electrical short in supply power wiring. Replace supply
Yes
No
power wiring.
Networking components may be defective, incorrectly
Yes
No
wired, or do not meet required specifications. Replace
with provided components or components that comply
with specifications on page 15.
Loose or misaligned CAT-5e cable connection. Unplug
Yes
No
and reconnect all CAT-5e cable connections.
Incorrect Modbus and/or biasing settings on one or
Yes
No
multiple VFDs. Adjust Modbus addresses and biasing
settings as shown on pages 16-18. All fans must have a
unique Modbus address setting.
Contact factory.
Yes
No
Overhead Ceiling Fans
23
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Table of Contents
Troubleshooting
