Siemens 6RA7086-6KS22 Operating Instructions Manual page 456

Faults / Alarms
Fault
No.
Cause as a function of fault value
(r047.001, r949.001 or r949.009 with acknowledged error)
10.1.2.11 Hardware 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:
1 Defective thyristor (short circuit in module V1, on 15A and 30 converters: V1 or V4)
2 Defective thyristor (short circuit in module V2, on 15A and 30 converters: V2 or V5)
3 Defective thyristor (short circuit in module V3, on 15A and 30 converters: V3 or V6)
4 Defective thyristor (short circuit in module V4, on 15A and 30 converters: V4 or V1)
5 Defective thyristor (short circuit in module V5, on 15A and 30 converters: V5 or V2)
6 Defective thyristor (short circuit in module V6, on 15A and 30 converters: V6 or V3)
8 Fault to ground in armature circuit
9 I=0 message defective
Possible fault cause
•
Defective A7001 electronics board
11 Thyristor cannot be fired (X11)
12 Thyristor cannot be fired (X12)
13 Thyristor cannot be fired (X13)
14 Thyristor cannot be fired (X14)
15 Thyristor cannot be fired (X15)
16 Thyristor cannot be fired (X16)
17 2 or more thyristors (MI) cannot be fired
Possible fault cause
•
Armature circuit interrupted
21 Thyristor cannot be fired (X21)
22 Thyristor cannot be fired (X22)
23 Thyristor cannot be fired (X23)
24 Thyristor cannot be fired (X24)
25 Thyristor cannot be fired (X25)
26 Thyristor cannot be fired (X26)
27 2 or more thyristors (MII) cannot be fired
31 Thyristor unable to block (X11 or X21)
32 Thyristor unable to block (X12 or X22)
33 Thyristor unable to block (X13 or X23)
34 Thyristor unable to block (X14 or X24)
35 Thyristor unable to block (X15 or X25)
36 Thyristor unable to block (X16 or X26)
10-20
Description
Further information (r047.002 to r047.016)
SIMOREG DC Master
05.05
SIEMENS AG 6RX1700-0AD76
Operating Instructions