09.02 Fault and Alarm Messages
Siemens AG 6SE7087-6AK85-1AA0
7-3
Rectifier/Regenerating Unit Operating Instructions
Fault
No.
Fault description
Fault
value
Meaning Possible causes
Countermeasures
F022 I
2
t Overload
I
2
t monitor of the power section has
responded
The monitor responds when 100 % of the
calculated I
2
t value of the power section is
reached.
- - - Drive operated too long under
overload conditions
- Check to see whether the rated
current of the R/G unit is
adequate for the specific
application
- See also P785
F023 LT-Temp.
Temperature of the power section too high
A check is made to see whether the heat
sink temperature measured using
thermistor(s) is > 95 °C (or 123,9°C)
1
Heat sink temperature > 95 °C
or with water-cooled units:
heat sink temperature > 123,9 °C
- Heat sink (air inlets and outlets)
contaminated
- Heat sink temperature sensor not
connected to X31, X32 on A1681
and/or A1682 module (“slave
unit”)
- Fan has no voltage
- Fan faulted
- Fan running in the wrong
direction
- Fan fuse (F3, F4) defective
NOTE:
- Measure inlet air ambient
temperature. If ϑ > 40 ºC, note
reduction curves. See Section
14.1.
With water-cooled units:
- Water inlet temperature too high,
cooling circuit interrupted or
cooling water pump faulty
Temperature of the power section too low 2
Heat sink temperature ≤ -45 °C
- Heat sink temperature sensor not
connected to X30 module on
A1681 and/or A1682
F029 Measure Flt
Fault in line voltage measurement
An offset > 5% has been detected when
attempting to compensate for the offset of
the line voltage measurement
1
2
3
4
Channel V-U faulted
(regenerative feedback
direction)
Channel V-W faulted
(regenerative feedback
direction)
Channel W-U faulted
(regenerative feedback
direction)
Channel W-U faulted
(infeed direction)
- Fault in the voltage path on the
power interface module (A1681
and/or A1682 and/or A1685) or
on the electronic module (CUR)
F030 DC Bus Short
DC link short-circuit
The monitor responds if the following
conditions obtain for longer than 0.5 sec:
- The current limit of the
rectifier/regenerating unit is reached
(this condition does not apply during
circuit identification or during DC link
forming)
- The rectifier or regenerative current is
greater than 10% of the rated DC
current (P075)
- The DC link voltage is less than 5% of
1.35*P071
- - - Short-circuit in the DC link
F031 Fuse Blown
Fuse blown in a thyristor branch of the
rectifier/regenerating unit or of a parallel
power section.
- - - Thyristor branch fuse faulted
F032 Phase Sequ.?
Wrong phase sequence
A check is make to see whether the phase
sequence of the rectifier bridge is the
same as that of the regenerative bridge.
- - - Phase sequence of the rectifier
bridge different from that of the
regenerative bridge
AoteWell Automation Sales Team
Buy Siemens PLC HMI Drives at AoteWell.com
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