Eaton MVX9000 Series, Руководство пользователя

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Common Problems and Solutions
7-2 MVX9000 User Manual
Tr
oubleshooting and
Fault Information
The AC 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 as
shown on the AC drive digital keypad display. The three most recent faults can be
read on the digital keypad display by viewing 80.04 through 80.06.
Note: Faults can be cleared by resetting at the keypad or with the Input Terminal.
Common Problems and Solutions
Table 7-1: Common Problems and Solutions
Fault Name Fault Descriptions Corrective Actions
The AC drive detects an
abnormal increase in
current. 1. Check that the motor horsepower
corresponds to the AC drive output
power.
2. Check the wiring connections between
the AC drive and motor for possible
short circuits.
3. Increase the acceleration time (20.08).
4. Check for possible excessive loading
conditions at the motor.
5. If there are any abnormal conditions
when operating the AC drive after a
short circuit is removed, it should be
sent back to manufacturer.
The AC drive detects
that the DC bus voltage
has exceeded its
maximum allowable
value. 1. Check that the input voltage falls within
the rated AC drive input voltage.
2. Check for possible voltage transients.
3. Bus over-voltage may also be caused by
motor regeneration. Either increase the
deceleration time or add an optional
braking resistor.
4. Check whether the required braking
power is within the specified limits.
The AC drive
temperature sensor
detects excessive heat. 1. Make sure 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 from the
heatsink and check for possible dirty
heatsink fins.
4. Provide enough spacing for adequate
ventilation.
The AC drive detects
that the DC bus voltage
has fallen below its
minimum value. Check that the input voltage falls within the
rated AC drive’s input voltage.