0x03
Instantaneous Over current on
the drive output.
Excess load or shock load on the
motor.
Fault occurs immediately on drive enable or run command
Check the output wiring connections to the motor and the motor for short circuits phase to
phase and phase to earth.
Fault occurs during motor starting
Check the motor is free to rotate and there are no mechanical blockages.
Fault occurs when motor operating at constant speed
Investigate overload or malfunction. The motor may be nearing the end of it's useful life. All
motors draw more current as they age. This motor may need to be replaced.
Fault
Code
No.
Description
Corrective Action
0x05 Hardware Over Current
Check the wiring to motor and the motor for phase to phase and phase to earth
short circuits. Disconnect the motor and motor cable and retest. If the drive trips
with no motor connected, it must be replaced and the system fully checked and
retested before a replacement unit is installed.
0x0B
External trip
(on digital input 3)
ESFR Fire Relay circuit is tripped. See the Installation and Technical Specifications
Guide for additional information including required programming.
0x0E Input phase loss trip
Drive intended for use with a 3 phase supply has lost one input phase.
See the ACS255 manual you received with your fan shipment for greater details.
Symptom
Fan Turning Wrong Direction
Fan Will Not Start
Troubleshooting Steps
For cooling (forward) operation the stepped edge of the blade should be the
leading edge. When running in destratification only (reverse) mode the
stepped edge of the blade should be trailing. You will feel no (or very little)
airflow when the fan is running in reverse. Reverse two of the phases either
at the control or at the motor to reverse fan direction.
1) Turn off the fan at the LOTO Disconnect on the face of the drive.
2) Wait ten seconds.
3) Reapply power and watch the drive go through it's normal start up sequence.
a) ABB shows on the screen for a few seconds.
b) Fan stats ("H" Hertz, "A" Amp Draw, "%" Speed)
4) If control boots up properly and fan will not turn remove power from the drive
and turn the fan by hand in both directions. Fan should move easily in both
directions.
5) Check power connections in all locations of the drive and motor.
6) Be sure input power in the drive is grounded to "PE" and output power from
the drive is grounded to either of the two ground terminals next to "PE".
Fan Wobbles During Operation
Fan mounting structure is not rigid enough to support normal fan
operation. Verify the fan is not being exposed to external air movement.
If the fan downtube is longer than 3 FT guy wires are required to
stabilize the fan. If guy wires are installed verify proper installation.
0x00 Drive is READY and in a stopped condition. The motor is not energized. No enable signal is present to start the drive.
F0006
0x07 Under voltage on DC bus
The incoming supply voltage is too low. This trip occurs routinely when power is
removed from the drive. If it occurs during running, check the incoming power
supply voltage and all components in the power feed line to the drive.
F0022
F0014
F0004
F0001
SToP
ACS255
CONTROL TROUBLESHOOTING
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40
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FAN
Installation and Technical Operations
®
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