Siemens SED2 Series User Manual

112/126
Siemens Building Technologies SED2 variable speed drives CM1U5192en
HVAC Products Troubleshooting 01.2002
Error Cause Diagnosis & Remedy Reaction
A0912
Vdc (min)
controller
enabled
Ø Vdc min controller enabled if the DC link
voltage (r0026) drops below the min. value
(P2172).
Ø The motor's kinetic energy is used to buffer the
DC link voltage and thus slow the drive.
Ø Temporary supply failures do not automatically
lead to undervoltage shutdown.
--
A0920
ADC parameters
not set properly
Ø ADC parameters must not be set to identical
values, as illogical values would result.
Ø Index 0: Parameter settings for output
identical.
Ø Index 1: Parameter settings for input identical.
Ø Index 2: Parameter settings for input do not
correspond to ADC type.
--
A0921
DAC parameters
not set properly
Ø DAC parameters must not be set to identical
values, as illogical values would result.
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.
--
A0922
No load applied
to VSD
Ø No load is applied to the VSD.
Some functions may not work as under normal
load conditions.
--
A0923
Both JOG left and
JOG right are
requested
Ø Both JOG right and JOG left (P1055/P1056)
have been requested. This freezes the RFG
output frequency at its current value
.
--
A0924
Belt failure
detected
Ø Load conditions at the motor indicate a belt
failure or mechanical fault.
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)
--

Siemens SED2 Series Specifications

General

Brand	Siemens
Model	SED2 Series
Category	Inverter
Language	English