Leroy-Somer POWERDRIVE MD, Руководство по вводу в эксплуатацию

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141
COMMISSIONING MANUAL
POWERDRIVE MD
Variable speed drive
TRIPS - DIAGNOSTICS
LEROY-SOMER
3871 en - 2011.05 / h
7 - TRIPS - DIAGNOSTICS
7.1 - Warnin g
• The user must not attempt to repair the drive himself, nor perform dia g nostics other than those listed in this
section. If the drive malfunctions, it should be returned to LEROY-SOMER via your usual contact.
7.2 - Trippin g on a fault
If the drive trips, the drive output bridge is inactive, and the drive no longer controls the motor.
The screen displays an active trip page, or "TRIP" flashes at the bottom of the screen.
All the trips indicated by the display are listed in the following table.
No.
Confi g uration
interface name
Reason for trip Solution
1 DC UnderVolt • DC bus undervoltage
• Check the mains supply
• This trip is not saved in the list of the 10 most recent trips
2 DC over volt • DC bus overvoltage
• Provide a braking resistor (optional)
• If a resistor is already connected, reduce its value
(within the permitted limits)
• Check that the mains supply is not subject to interference
• Check the motor insulation
• Increase the deceleration time in
00.04
(
02.21
).
• Check the deceleration mode
3 Over current • Overcurrent at drive output
• Check the motor insulation and connection
• Increase the acceleration and deceleration ramps
• Check the wiring, coupling and signals
(interference) of the speed feedback
• Check that the motor cables are not too long
• Reduce the speed loop gains
00.18
(
03.10
),
00.19
(
03.11
) and
03.12
• If it has not already been done, perform autotuning
00.42
= 2.
• Reduce the current loop gains
04.13
and
04.14
.
This trip cannot be reset for a period of 10 seconds.
4 Brak. IGBT • Braking IGBT transistor overcurrent
• Check the resistor insulation
• Remove the short-circuit at the resistor output
• Put in a resistor of higher ohmic value
• If there is no braking IGBT, see
10.37
This trip cannot be reset for a period of 10 seconds.
5 I IMBALANCED
• Phase current imbalance
• Vectorial sum of the 3 motor
currents is not zero
• Test the motor insulation
• Check the speed and current stability
6 Out Ph. loss • Loss of a motor phase
• Check the connection of the U, V and W phases at the
motor and the drive
7 Over speed
• The speed is higher than 1.3 times the
value of
00.02
(
01.06
)
• Check that the load is not driving
• Adjust the speed loop gains
• Increase the deceleration ramp
9 IGBT U • Problem on an IGBT (U)
• Reduce the motor load, the cycle, the switching frequency
(see
00.12
or
05.18
), and lengthen the
acceleration ramp (see
00.03
or
02.11
) and
deceleration ramp (see
00.04
or
02.21
).
10 RECTIFIER Th
• Rectifier bridge temperature too
high, there is a ventilation problem,
the ambient temperature is too high
or the load is too great
• Check the ambient temperature
• Check the drive load level
• Check that all the fans are working
• See
10.75
11 Encoder rot
• The measured position does not vary
(the encoder is incorrectly connected,
not powered or the shaft is not turning)
• Check the encoder wiring
• Make sure that the motor is rotating normally