Operating Instructions

SED2 VFD Operation & Maintenance Manual
76 Siemens Building Technologies, Inc.
Error Cause Diagnosis and Remedy Reaction
A0503,
Undervoltage
limit
• Main power failed.
The main power and
consequently the DC link voltage
(r0026) are below the defined
threshold value.
Check the main supply voltage. --
A0504, SED2
overtemperature
• The warning level of the
SED2 heat sink
temperature (r0037) is
exceeded.
This results in a reduced pulse
frequency and/or a reduced
output frequency (dependent on
parameter setting in (P0610).
Check the following:
• The ambient temperature must lie
within the limits specified.
• The load conditions and duty cycle
must lie within the specified
conditions.
• The fan must turn when the SED2 is
running.
--
A0505, SED2 I2T
• Warning level
exceeded. The current
supply is reduced if
parameter P0610 is set
to 1.
Check that the duty cycle lies within the limits
specified.
Motor power (P0307) (SED2 power) (P0206).
--
A0506, SED2
duty cycle
• Difference between the
heat sink temperature
and the IGBT exceeds
the warning levels.
Check the following: Make sure that the load
duty cycles (temporary overload) lie within the
limits specified.
--
A5011, Motor
overtemperature
I2T
• The motor is
overloaded.
• The duty cycle is
outside the tolerance.
--
A0520, Rectifier
overtemperature
• The warning level of the
rectifier heat sink
temperature is
exceeded.
Check the following:
• The ambient temperature must lie
within the limits specified.
• The load conditions and duty cycle
must lie within the specified
conditions.
• The fan must turn when the SED2 is
running.
--
A0523, SED2
output fault
• The On-phase is
interrupted at the SED2
output.
--
A0541, Motor
data identification
enabled
• Motor data identification
(P1910) selected or
running.
--
A0600, RTOS
data loss
--