Electrical Troubleshooting - BIG ASS FANS Essence Guia De Instalacion

42

Electrical troubleshooting

Fan status LED definitions
The fan direction selector switch and fan status LED are located on the cover plate assembly at the bottom of the fan's extension tube.
FWD REV
Note: For information on changing
the fan direction, see page 36.
LED status:
One 1/2-Second Flash/4 Seconds Off
Two 1/2-Second Flashes/4 Seconds Off
Three 1/2-Second Flashes/4 Seconds Off
Four 1/2-Second Flashes/4 Seconds Off
Five 1/2-Second Flashes/4 Seconds Off
Six 1/2-Second Flashes/4 Seconds Off
Seven 1/2-Second Flashes/4 Seconds Off
Eight 1/2-Second Flashes/4 Seconds Off
Nine 1/2-Second Flashes/4 Seconds Off
Fan status LED troubleshooting
LED code
Over Temperature
Output Device Failure
Internal Communication Error
DC Buss Undervoltage
DC Buss Over Voltage
Motor Overload/Thermal Trip
Current Limit/Short Circuit
Motor Stall
Run Enable Jumper Open
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Troubleshooting (cont.)
Fan Direction
Selector Switch
Fan Status LED
Definition:
Over Temperature
Motor Stall
Output Device Failure
Internal Communication Error
DC Buss Undervoltage
DC Buss Over Voltage
Run Enable Jumper Open
Motor Overload/Thermal Trip
Current Limit/Short Circuit
Description/Possible cause(s)
The fan drive electronics have exceeded safe operating
temperature limits.
The fan drive electronics have failed or output phase
loss has occurred.
The main fan drive has failed to respond to the
command source (daughterboard, etc.).
Buss voltage has fallen below 255VDC.
Buss voltage has exceeded 373VDC.
Thermal motor overload protection has been activated.
The hardware current limit has been reached. A severe
overload or short circuit condition exists on the fan drive
output.
The fan failed to accelerate to the target RPM within one
(1) minute of startup.
The run enable circuit is open and motor operation is
disabled.
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Cover Plate
Assembly
Possible solution(s)
The fan will shut down for five (5) minutes
and then attempt to restart two (2) 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.
The fan will shut down and will not attempt
to restart. Contact Customer Service.
Make sure the blue wire and the yellow
wire on the controller input cable are wired
together, or check for a false fire relay trip.
If the circuit is open or the fire relay has
tripped, close the circuit, and then reset
power to the fan. See pages 30–32 for
wiring diagrams.