Overhead Ceiling Fans
44
®
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?
Yes
No
One or more fans may have experienced a fault.
Refer
to list of fault codes on page 50 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 appropriate control manual for
accessing Op Status code.
2
Is the control set to a speed greater than 0 and have the
fans been turned on via the control’s power button?
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”.
3
Are motor power, motor ground, and hall cables connected
to all VFDs?
Yes
No
No connection between motor and VFD.
Connect motor
power, motor ground, and hall cable to VFDs. Refer to
instructions on pages 30-32.
4
Have motor power and hall cables been unplugged and
reconnected to ensure that they are connected in the
proper orientation and fully seated on all VFDs (will hear a
“click” when fully seated)?
Yes
No
Loose or misaligned motor power or hall cable
connection.
Unplug and reconnect motor power and hall
cables. Refer to pages 30-32 for correct orientation.
5
Are resistance measurements across L1 & L2, L2 & L3, L1
& L3 on the pins of the motor power cable approximately
equal?
Yes
No
Defective motor.
Contact factory/sales representative.
6
Are resistance measurements across L1 & GND, L2 &
GND, L3 & GND on the pins of the motor power cable
open (no resistance)?
Yes
No
Defective motor.
Contact factory/sales representative.
7
Do fans operate as expected?
Yes
No
Contact factory.
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?
Yes
No
Incorrect torque/speed command to fans.
Set fan size
and blade count using instructions in the appropriate
control manual. Fan size and blade count must be set to
match physical product.
2
Turn off power and rotate all fans by hand. Can fans rotate
freely without any audible rubbing, scraping, or grinding
noise?
Yes
No
Rubbing components on the fan hub and/or airfoils.
Correct any issues that are found.
3
Are motor power, motor ground, and hall cables connected
to all VFDs?
Yes
No
No connection between motor and VFD.
Connect motor
power, motor ground, and hall cable to VFDs. Refer to
instructions on pages 30-32.
4
Have motor power and hall cables been unplugged and
reconnected to ensure that they are connected in the
proper orientation and fully seated on all VFDs (will hear a
“click” when fully seated)?
Yes
No
Loose or misaligned motor power or hall cable
connection.
Unplug and reconnect motor power and hall
cables. Refer to pages 30-32 for correct orientation.
5
Is dipswitch bank 1 on fan VFD set appropriately for all
installed fans?
Yes
No
Incorrect dipswitch setting.
Set dipswitch bank 1 as
indicated below:
If model name on fan nameplate includes “-70LV” or
“-70HV”, set dipswitch 1 position 1 to OFF and dipswitch 1
position 2 to OFF.
If model name on fan nameplate includes “-170LV” or
“-170HV”, set dipswitch 1 position 1 to ON and dipswitch 1
position 2 to OFF.
6
Are resistance measurements across L1 & L2, L2 & L3, L1
& L3 on the pins of the motor power cable approximately
equal?
Yes
No
Defective motor.
Contact factory/sales representative.
7
Are resistance measurements across L1 & GND, L2 &
GND, L3 & GND on the pins of the motor power cable
open (no resistance)?
Yes
No
Defective motor.
Contact factory/sales representative.
8
Do fans operate as expected?
Yes
No
Contact factory.
Everything is working properly.
Refer
ence
Tr
oubleshooting
Oper
ation And
Maintenance
Fan
Netw
orking
Electrical
Installation
Fir
e System
Integr
ation
Mechanical Installation
Pr
e-Installation
Gener
al
Information
Quick Start
Guide