Siemens SED2 series Operating Instructions Manual page 112
Variable speed drives
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Also See for SED2 series:
- Commissioning manual (100 pages) ,
- Application manual (44 pages) ,
- Operating instructions manual (40 pages)
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Error
Cause
A0912
Vdc min controller enabled if the DC link
Ø
Vdc (min)
voltage (r0026) drops below the min. value
controller
(P2172).
enabled
The motor's kinetic energy is used to buffer the
Ø
DC link voltage and thus slow the drive.
Temporary supply failures do not automatically
Ø
lead to undervoltage shutdown.
A0920
ADC parameters must not be set to identical
Ø
ADC parameters
values, as illogical values would result.
not set properly
Index 0: Parameter settings for output
Ø
identical.
Index 1: Parameter settings for input identical.
Ø
Index 2: Parameter settings for input do not
Ø
correspond to ADC type.
A0921
DAC parameters must not be set to identical
Ø
DAC parameters
values, as illogical values would result.
not set properly
Index 0: Parameter settings for output identical.
Ø
Index 1: Parameter settings for input identical.
Ø
Index 2: Parameter settings for output do not
Ø
correspond to DAC type.
A0922
No load is applied to the VSD.
Ø
No load applied
Some functions may not work as under normal
to VSD
load conditions.
A0923
Both JOG right and JOG left (P1055/P1056)
Ø
Both JOG left and
have been requested. This freezes the RFG
JOG right are
output frequency at its current value
requested
A0924
Load conditions at the motor indicate a belt
Ø
Belt failure
failure or mechanical fault.
detected
112/126
Siemens Building Technologies
HVAC Products
.
SED2 variable speed drives
Troubleshooting
Diagnosis & Remedy
Check the following:
1. No breakage, seizure, or obstruction of drive
train.
2. Correct operation of external speed sensor, if in
use.
3. P0402 (pulse/min at rated speed), P2164
(hysteresis frequency deviation) and P2165
(delay time for permissible deviation) must have
correct values:
P2155 (threshold frequency f1)
P2157 (threshold frequency f2)
P2159 (threshold frequency f3)
P2174 (upper torque threshold 1)
P2175 (lower torque threshold 1)
P2176 (delay T_Torque)
P2182 (upper torque threshold 2)
P2183 (lower torque threshold 2)
P2184 (upper torque threshold 3)
P2185 (lower torque threshold 3)
Reaction
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CM1U5192en
01.2002
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