Technical data

Chapter 7 – Troubleshooting
Siemens Building Technologies, Inc. 69
Error Cause Diagnosis and Remedy Reaction
A0921, DAC
parameters not
set properly
• DAC parameters must
not be set to identical
values, as illogical
values would result.
• Index 0: Parameter
settings for output
identical.
• Index 1: Parameter
settings for input
identical.
• Index 2: Parameter
settings for output do
not correspond to DAC
type.
--
A0922, No load
applied to SED2
• No load is applied to the
SED2.
• Some functions may not
work as under normal
load conditions.
--
A0923, Both
JOG left and
JOG right are
requested
• Both JOG right and
JOG left have been
requested. This freezes
the RFG output
frequency at its current
value.
--
A0924, Belt
failure detected
• Load conditions at the
motor indicate a belt
failure or mechanical
fault.
Check the following:
• No breakage, seizure, or
obstruction of drive train.
• Correct operation of external
speed sensor, if in use.
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