Operating Instructions

Troubleshooting
Siemens Building Technologies, Inc. 101
Error Cause Diagnosis and Remedy
Drive
Reaction
A0921, Analog
output
parameters not
set properly
• Analog output 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 analog output 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 (ramp function
generator) output frequency at
its current value.
— —
A0952, Belt
failure detected
Load conditions at the motor
indicate a belt failure or
mechanical fault.
• No breakage, seizure, or
obstruction of SED2 train.
• Correct operation of
external speed sensor, if
in use.
—