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Troubleshooting
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.
PROBLEM
CAUSE
Fan speed too low
Reduced airflow
Fan operating in reverse
Excessive dirt buildup on impeller
Excessive vibration
Excessive noise
Defective motor
Defective variable frequency drive (VFD)
Electrical supply
Fan does not operate
Motor/VFD system
Fault Code Causes and Possible Solution
CODE
FAULT
0
No Fault
1
Modbus Timeout
2
Impact Detection
3
Motor Over Temperature
4
Drive Over Temperature
5
Bus Over Voltage
6
Bus Under Voltage
7
Phase Over Current
8
Microcontroller High Temp
9
Overspeed Fault
22
High Volume, Low Speed Ceiling Fans
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.
CORRECTIVE ACTION
Increase fan speed
Reverse the direction of operation using the fan controller
Clean impeller
Clean dirt buildup from impeller. Check all setscrews and fasteners
for tightness. Check guy wire tension (if applicable).
Replace motor
Replace VFD
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.
Check for faults. Refer to instruction manual for controller.
DESCRIPTION
No activity on Modbus (check control connection)
Unexpected change in speed and/or torque indicates impact
Motor temperature exceeds 110°C
Drive components over 110°C
DC Bus voltage is greater than 385v
DC Bus voltage is less than 140v
Phase Current is greater than 6A RMS
Microcontroller Unit Temperature is greater than 110°C
Blade Speed is greater than 300 rpm
®
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