Issue 01/06

Faults and Alarms

5.2Alarm Messages

Alarm messages are stored in parameter r2110 under their code number (e.g. A0503 = 503) and can be read out from there.

A0501 Current limit value

Cause

-the motor power rating does not correspond to the inverter power rating

-motor cables are too long

-ground fault

Diagnosis & Remedy

Please check the following:

-does the motor power rating (P0307) match the inverter power rating (r0206) ?

-are the limit values for the cable lengths maintained ?

-does the motor cable or motor have a short-circuit or ground fault ?

-do the motor parameters correspond to those of the motor being used ?

-stator resistance value (P0350) correct ?

-is the motor overloaded or is the rotor locked (cannot rotate) ?

-ramp-up time P1120 too low ?

A0502 Overvoltage limit value

Cause

-the overvoltage limit value has been reached (actual value of the DC link voltage r0026 greater than r1242).

Diagnosis & Remedy

-if this alarm is permanently displayed, check the inverter input voltage.

-is the DC link voltage controller (Vdc_max controller) de-activated (refer to parameter P1240) ?

-short ramp times and/or large flywheel masses (moment of inertia) ?

A0503 Undervoltage limit value

Cause

-line supply has failed.

-line voltage and therefore also the DC link voltage (r0026) below the defined limit value (refer to parameter r0026).

Diagnosis & Remedy

-check the line voltage.

A0504 Inverter overtemperature

Cause

-alarm threshold of the inverter heatsink temperature (P0614) was exceeded; this results in a reduction of the pulse frequency and/or the output frequency (dependent on the parameterization in (P0610).

Diagnosis & Remedy

Please check the following:

-is the ambient temperature within the permissible limits ?

-are the load and load duty cycle within the permissible limits ?

A0505 Inverter I2T

Cause

-overload alarm limit P0294 is exceeded (refer to utilization r0036)

-the pulse frequency and/or the output frequency is reduced as a function of the setting of parameter P0290.

Diagnosis & Remedy

-check whether the load duty cycle lies within the permissible limits.

A0506 Inverter load duty cycle

Cause

-difference between the temperature at the heatsink and IGBT exceeds the alarm limit values.

Diagnosis & Remedy

-please ensure that the load duty cycle and load surge lie within the permissible limits.

MICROMASTER 440

Parameter List

6SE6400-5BB00-0BP0

315

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Siemens 440 manual Alarm Messages