Troubleshooting The Fan Controller - BIG ASS FANS 4900 Installation Manual

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Troubleshooting the fan controller

Some controller issues can be resolved before requesting service. Review the below warning and fault messages and diagnostics
before contacting Customer Service for support.
Status and warning messages
Message Description
EPM Contains Earlier Firmware Version
To correct this condition
button to scroll to P199
Current Limit
Decel Override
Fan is stopping too fast, causing a DC Buss overvoltage. Drive is backing off the deceleration rate to prevent HP
(Over-voltage) fault.
Error
Invalid data or invalid command entered.
Fast Current Limit
Overload
Check for short circuits throughout the load. Increase accel time.
Flying Restart Attempt after Fault
Program Attempt Made in OEM Settings Mode
(P199=1)
Parameter changes are not permitted.
Reset EPM to OEM Defaults Failure
Fault Lockout
Start Pending
The drive has tripped and is waiting to restart.
Fan Stopped
Output frequency is 0 Hz.
Fault messages
Message Description
High Temperature fault
Check for excessive load or a dirty heatsink. Improve the drive cooling ability.
Assertion Level fault
Check the assertion level switch relative to P120.
Personality fault
Drive hardware error
Cycle power, and then reprogram EPM. If the fault will not clear, replace the drive and EPM.
Control fault
Drive hardware error
Cycle power, and then reprogram EPM. If the fault will not clear, replace the drive and EPM.
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