Siemens sed2 Commissioning Manual page 47

Error Cause
Ø Vdc min controller enabled if the DC link volt-
A0912
Vdc (min) con- age (r0026) drops below the min. value
troller enabled (P2172)
Ø The motor's kinetic energy is used to buffer the
DC link voltage and thus slow the VSD
Ø
Temporary supply failures do not automatically
lead to undervoltage shutdown
A0920 Ø ADC parameters must not be set to identical
ADC parameters values, as illogical values would result
not set properly
Ø
Index 0: Parameter settings for output identi-
cal
Ø
Index 1: Parameter settings for input identical
Ø
Index 2: Parameter settings for input do not
correspond to ADC type
Ø DAC parameters must not be set to identical
A0921
DAC parameters values, as illogical values would result
not set properly
Ø Index 0: Parameter settings for output identical
Ø Index 1: Parameter settings for input identical
Ø
Index 2: Parameter settings for output do not
correspond to DAC type
Ø
A0922
No load is applied to the VSD
No load applied
Some functions may not work as under normal
to VSD
load conditions.
Ø
A0952
Load conditions at the motor indicate a belt
Belt failure de-
failure or mechanical fault
tected
Siemens Building Technologies
HVAC Products
Commissioning Guide
9 Error messages
Diagnosis and troubleshooting
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 (hys-
teresis 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)
Re-
sponse
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CM1G5192en
26.02.2003