Eaton NFX9000, Руководство пользователя

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NFX9000 Adjustable Frequency Drives
MN04002003E
For more information visit: www.EatonElectrical.com
A-1
February 2006
Appendix A — Fault Codes
The NFX9000 drive has a comprehensive fault diagnostic system that includes several
different alarms and fault messages. Once a fault is detected, the corresponding protective
functions will be activated. The following faults are displayed on the AC drive digital keypad.
The six most recent faults can be read on the digital keypad display by viewing Parameter
6-07 to Parameter 6-12.
Note: Faults can be cleared by pressing the RESET key on the keypad or Input Terminal.
Table A-1: Common Problems and Solutions
Fault
Name
Fault Description Corrective Action
oc Drive detects an abnormal increase in
current 1. Make sure the motor’s horsepower corresponds to
the drive’s output power.
2. Check the wiring connections between the drive
and motor for possible short circuits.
Note: If there are any abnormal conditions when
operating the drive after the short circuit is
removed, consult Eaton.
3. Increase the acceleration time (parameters 1-09
and 1-11).
4. Check for possible excessive loading.
ou Drive detects that DC bus voltage has
exceeded its maximum allowable
value 1. Make sure the input voltage falls within the drive’s
input voltage rating range.
2. Check for possible voltage transients.
3. Increase the deceleration time. (Bus overvoltage
may also be caused by motor regeneration.)
oH Drive’s temperature sensor detects
excessive heat 1. Ensure that the ambient temperature falls within
the specified temperature range.
2. Make sure that the ventilation holes are not
obstructed.
3. Remove any foreign objects on the heat-sink and
check for possible dirty heat-sink fins.
4. Provide enough spacing for adequate ventilation.
Lu Drive detects that DC bus voltage has
fallen below its minimum value Make sure the input voltage falls within the drive’s
input voltage rating range.
oL1 Internal electronic overload trip 1. Check for a possible motor overload.
2. Check electronic thermal overload setting.
3. Increase motor capacity.
4. Reduce the current level so the drive’s output
current does not exceed the value set by the Motor
Rated Current, parameter 7-00.
EF External terminal EF-GND goes from
OFF to ON When the EF-GND is closed, the output will be turned
off (under N.O.E.F.)
oL2 Motor overload 1. Check settings for parameters 6-03 to 6-05.
2. Reduce the motor load.
3. Adjust the over-torque detection setting to an
appropriate setting.