Operating Instructions

Faults and alarms

List of faults and alarms

3-692

SINAMICS G120 CU230P-2 Control Units List Manual (LH9), 01/2013

A07851 (F) External alarm 2

Reaction: NONE

Acknowledge: NONE

Cause: The BICO signal for "external alarm 2" was triggered.

The condition for this external alarm is fulfilled.

See also: p2107 (External fault 2)

Remedy: Eliminate the causes of this fault.

F07862 (A) External fault 3

Reaction: OFF2 (IASC/DCBRK, NONE, OFF1, OFF3, STOP2)

Acknowledge: IMMEDIATELY (POWER ON)

Cause: The BICO signal "external fault 3" was triggered.

See also: p2108 (External fault 3), p3111 (External fault 3 enable), p3112 (External fault 3 enable negated)

Remedy: Eliminate the causes of this fault.

F07900 (N, A) Drive: Motor blocked

Reaction: OFF2 (NONE, OFF1, OFF3, STOP2)

Acknowledge: IMMEDIATELY

Cause: Motor has been operating at the torque limit longer than the time specified in p2177 and below the speed threshold

in p2175.

This signal can also be triggered if the speed is oscillating and the speed controller output repeatedly goes to its limit.

It may also be the case that thermal monitoring of the power unit reduces the current limit (see p0290), thereby caus-

ing the motor to decelerate.

See also: p2175 (Motor blocked speed threshold), p2177 (Motor blocked delay time)

Remedy: - check that the motor can freely move.

- check the effective torque limit (r1538, r1539).

- check the parameter, message "Motor blocked" and if required, correct (p2175, p2177).

- check the direction of rotation enable signals for a flying restart of the motor (p1110, p1111).

- for U/f control: check the current limits and acceleration times (p0640, p1120).