Parker ac890 - Page 341

11-10 Trips & Fault Finding
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D
6511
Keypad
Display
6901
Keypad
Display
Description Possible Reason for Trip
ATN1 MAX SPEED LOW
♦ During Autotune the motor is required to run at the
nameplate speed o f 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.
ATN2 MAINS VOLTS LOW
♦ The mains input voltage is not sufficient to carry out
the Autotune. Re-try when the mains have recovered.
ATN 3 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
ATN4 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.