Installation Guide

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Fan status LED troubleshooting
LED code Description/Possible cause(s) Possible solution(s)
Over Temperature
The fan drive electronics have exceeded
safe operating temperature limits.
The fan will shut down for five
minutes and then attempt to restart
two times. If the fan does not restart
after two attempts, reset power to
the fan. If the fan still does not restart,
contact Customer Service.
Output Device Failure
The fan drive electronics have failed or
output phase loss has occurred.
Internal Communication
Error
The main fan drive has failed to respond
to the command source (daughterboard,
etc.).
DC Buss Undervoltage Buss voltage has fallen below 255 VDC.
DC Buss Over Voltage Buss voltage has exceeded 373 VDC.
Motor Overload/Thermal
Trip
Thermal motor overload protection has
been activated.
Current Limit/Short Circuit
The hardware current limit has been
reached. A severe overload or short circuit
condition exists on the fan drive output.
Motor Stall
The fan failed to accelerate to the target
RPM within one minute of startup.
The fan will shut down and will not
attempt to restart. Contact Customer
Service.
Run Enable Jumper Open
The run enable circuit is open and motor
operation is disabled.
Make sure the blue wire and the
yellow wire on the controller input
cable are wired together. See
the Wiring Diagrams & Electrical
Guidelines section for wiring details.