Siemens 6RA70 specifications Hardware faults, Fault Description

Fault

No.

Description
Cause as a function of fault value	Further information (r047.002 to r047.016)
(r047.001, r949.001 or r949.009 with acknowledged error)

9.1.2.11Hardware faults

F061

Fault message from thyristor check function (active in operating state o3)

This fault message can be activated only if the thyristor check is activated via parameter P830.

If “Thyristor defective” or “Thyristor unable to block” is signaled, then the relevant thyristor module must be replaced.

Possible causes for irreparable damage to thyristors:

♦Interruption in snubber circuit

♦Current controller and precontrol are not optimized (excessive current peaks)

♦Inadequate cooling (e.g. fan is not operating, ambient temperature is too high, fan is rotating in wrong direction (incorrect phase sequence), inadequate air supply, heatsink is very dirty)

♦Excessive voltage peaks in incoming supply system

♦External short circuit or fault to ground (check armature circuit)

If “Thyristor unable to block” is signaled, the cause can generally be attributed to a firing circuit fault, rather than to a defective thyristor.

Possible causes:

♦Firing pulse cable to relevant thyristor is interrupted

♦Ribbon cable X101 or X102 is incorrectly inserted or interrupted

♦Defective electronics or gating board

♦Internal interruption in gating cable in thyristor module

The designations of the firing cables and associated thyristors can be found in Section 6.4 (power connections).

Fault value:

1Defective thyristor (short circuit in module V1, on 15A and 30 converters: V1 or V4)

2Defective thyristor (short circuit in module V2, on 15A and 30 converters: V2 or V5)

3Defective thyristor (short circuit in module V3, on 15A and 30 converters: V3 or V6)

4Defective thyristor (short circuit in module V4, on 15A and 30 converters: V4 or V1)

5Defective thyristor (short circuit in module V5, on 15A and 30 converters: V5 or V2)

6Defective thyristor (short circuit in module V6, on 15A and 30 converters: V6 or V3)

8Fault to ground in armature circuit

9I=0 message defective Possible fault cause

• Defective A7001 electronics board

11Thyristor cannot be fired (X11)

12Thyristor cannot be fired (X12)

13Thyristor cannot be fired (X13)

14Thyristor cannot be fired (X14)

15Thyristor cannot be fired (X15)

16Thyristor cannot be fired (X16)

172 or more thyristors (MI) cannot be fired Possible fault cause

• Armature circuit interrupted

21Thyristor cannot be fired (X21)

22Thyristor cannot be fired (X22)

23Thyristor cannot be fired (X23)

24Thyristor cannot be fired (X24)

25Thyristor cannot be fired (X25)

26Thyristor cannot be fired (X26)

272 or more thyristors (MII) cannot be fired

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