Operating Instructions

Troubleshooting
Siemens Building Technologies, Inc. 93
Error Cause Diagnosis/Remedy
Drive
Reaction
F0021,
Ground fault
The ground fault occurs if
the sum of the phase
currents is higher than 5%
of the nominal SED2
current.
NOTE: This error
message occurs on SED2s
with three current sensors;
that is, for SED2s of frame
sizes D to F.
— Off2
F0022,
Power stack
fault
The fault is caused by the
following events:
(1) dc link overcurrent =
short circuit of IGBT.
(2) short circuit of dc link
chopper
(3) ground fault.
Frame sizes A to C =
(1),(2),(3).
Frame sizes D to E =
(1),(2).
Frame size F = (2).
Since all these faults are
assigned to one signal on
the power stack, it is not
possible to establish which
one actually occurred.
• Check for loose output or short.
• Possible drive component failure.
Off2
F0023, Fault
at SED2
output
On-phase is interrupted at
the SED2 output.
— Off2
F0024,
Rectifier
over-
temperature
• Ventilation is inadequate.
• Fan is inoperative.
• Ambient temperature is
too high.
• Fan must turn when the SED2 is
running.
• Pulse frequency (P1800) must be
set to default value 4 kHz.
—
F0030, Fan
fault
See previous fault in log..
• See previous fault in log.
Off2
F0035, Auto
Retart
Failure
The drive sees a fault and
after attempting the number
of restarts specified by
P1211, the drive still sees
the fault so F0035 occurs.
• Review r0947 (last fault code) for
the root cause of the fault and
diagnose per that fault.
Off2