High Volume, Low Speed Ceiling Fans
22
®
DANGER
Disconnect and secure to the ‘OFF’ position all
electrical power to the fan prior to inspection or
servicing. Failure to comply with this safety precaution
could result in serious injury or death.
Each fan bears a manufacturer’s nameplate with the
fan’s model number and a unique serial number for
identification. This information will assist the local
representative and the manufacturer in providing service
and replacement parts.
Troubleshooting
PROBLEM
CAUSE
CORRECTIVE ACTION
Reduced airflow
Fan speed too low
Increase fan speed
Fan operating in reverse
Reverse the direction of operation using the fan controller
Excessive dirt buildup on impeller
Clean impeller
Excessive noise
Excessive vibration
Clean dirt buildup from impeller. Check all setscrews and fasteners
for tightness. Check guy wire tension (if applicable).
Defective motor
Replace motor
Defective variable frequency drive (VFD)
Replace VFD
Fan does not operate
Electrical supply
Check for switches turned off or disconnected. Check for correct
supply voltage. Check fuses/circuit breakers. In the event of blown
fuses, contact the factory before proceeding with troubleshooting.
Motor/VFD system
Check for faults. Refer to instruction manual for controller.
Fault Code Causes and Possible Solution
CODE
FAULT
DESCRIPTION
0
No Fault
1
Modbus Timeout
No activity on Modbus (check control connection)
2
Impact Detection
Unexpected change in speed and/or torque indicates impact
3
Motor Over Temperature
Motor temperature exceeds 110°C
4
Drive Over Temperature
Drive components over 110°C
5
Bus Over Voltage
DC Bus voltage is greater than 385v
6
Bus Under Voltage
DC Bus voltage is less than 140v
7
Phase Over Current
Phase Current is greater than 6A RMS
8
Microcontroller High Temp
Microcontroller Unit Temperature is greater than 110°C
9
Overspeed Fault
Blade Speed is greater than 300 rpm
