AIRPOLE
21
9
TROUBLESHOOTING
In case of failure, refer to the following table for quick solutions:
Observation
Probable cause
Inspection method
The fan can't start normally
The main switch is not working
correctly
Reset the variable frequency drive
Check control wires connections
Replace the main switch
The fan can't start normally
The potentiometer is not working
correctly
Reset the variable frequency drive
Check control wires connections
Replace the potentiometer
The fan can't start normally
Voltage below level
Check input voltage
Check power connections
The fan can't start normally
VFD alarm
Follow the drive instructions to
remove the trouble, reset and restart
