Parker AC890PX Series, Engineering Reference

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C h a p t e r 8 : T r i p s & F a u l t F i n d i n g
8-7
AC890PX AC Drive
Keypad
Display
Description Possible Reason for Trip
OVERSPEED Speed feedback > 150% for 0.1 seconds
ANALOG INPUT ERR 4-20mA analog input current > 22mA could damage the input
circuit
INT DB RESISTOR Braking mode set to INTERNAL. Set to EXTERNAL and connect
an External Braking Resistor if braking is required.
UNKNOWN An unknown trip - refer to Parker SSD Drives
OTHER
One or more trips listed below have occurred with a Value greater
than 32.
MAX SPEED LOW
During Autotune the motor is required to run at the nameplate
speed of the motor. If MAX SPEED RPM limits the speed to less
than this value, an error will be reported. Increase the value of
MAX SPEED RPM up to the nameplate rpm of the motor (as a
minimum). It may be reduced, if required, after the Autotune is
complete.
MAINS VOLTS LOW
The mains input voltage is not sufficient to carry out the Autotune.
Re-try when the mains has recovered.
NOT AT SPEED
The motor was unable to reach the required speed to carry out the
Autotune. Possible reasons include: motor shaft not free to turn;
the motor data is incorrect
MAG CURRENT FAIL
It was not possible to find a suitable value of magnetising current
to achieve the required operating condition for the motor. Check
the motor data is correct, especially nameplate rpm and motor
volts. Also check that the motor is correctly rated for the drive.
NEGATIVE SLIP F
Autotune has calculated a negative slip frequency, which is not
valid. Nameplate rpm may have been set to a value higher than the
base speed of the motor. Check nameplate rpm, base frequency,
and pole pairs are correct.
TR TOO LARGE
The calculated value of rotor time constant is too large. Check the
value of nameplate rpm.