38
TRIPS - DIAGNOSTICS
POWERDRIVE MD2R Installation guide
4948 - 2017.11 / d
en
No.
Parameter-
setting interface
name
Reason for trip
Solution
4
Brak. IGBT
Braking IGBT transistor overcurrent
• Check the braking resistor wiring and insulation level.
• Make sure that the resistor ohmic value is compatible with
the MD-TF option used.
This trip cannot be reset for a period of 10 seconds.
5
I IMBALANCED
Motor current imbalance:
vectorial sum of the 3 motor currents is not
zero
• Check the motor insulation.
• Check the cable insulation.
6
Out Ph. loss of a
motor phase
Loss of a motor phase
Check the motor cable and resistance values between motor
phases.
7
Overspeed
The speed is greater than (1.3 x
01.06
) or
(
01.06
+ 1000 rpm)
• Check the drive settings.
• When the flying restart function is not being used, check
that
06.09
is at "Disabled".
8
Drive overload
Ixt
The drive overload level exceeds the
conditions defined in section 1.4.2 of the
installation manual
• Check the drive is suitable for the motor current cycle.
• Check the ambient temperature.
9
IGBT U
Internal protection of phase U IGBTs
• Check the motor and cable insulation.
10
Th rectifier
Not used
11
Encoder rot
The measured position does not vary (only
if a feedback speed option is present)
• Check the encoder wiring.
• Check that the motor shaft turns.
13
UVW invert
The encoder U, V, W signals are reversed
(only if a feedback speed option is present) Check the conformity of the encoder wiring.
14
TUNE U Encod
During the autotune phase, one of the
encoder U, V or W commutation channels
is not present
• Check the encoder wiring.
• Check the encoder connections.
• Change the encoder.
15
TUNE V Encod
16
TUNE W Encod
18
AUTOTUNE
A stop command has been given during the
autotune phase.
Repeat the autotune procedure (see
05.12
)
19
Brak. resist.
Parameter
10.39
"Braking energy overload
accumulator" has reached 100%
• Check the settings of
10.30
and
10.31.
• Check the resistor is compatible with the application
requirements.
21
IGBT U
overheating
Overheating of phase U IGBTs
• Clean the cabinet dust filters.
• Check the drive ventilation units are working correctly.
• Check that the product air inlet temperature is not outside
the limits.
• If the trip appears at frequencies lower
than 10 Hz, check that the current levels depending on the
frequency are complied with.
• Check that the switching frequency
05.18
is compatible
with the motor current level.
