Technical data

SED2 Operation & Maintenance Manual
66 Siemens Building Technologies, Inc.
Reading Faults
• OK FAULT (r0052, bit 3) is a read-only fault status point (0=OK, 1=Fault).
• LAST FAULT (r0947(0)) shows the code for the most recent fault.
Resetting Faults
• Press to reset a fault condition.
• OK FAULT (r0052, bit 3) is a read-only fault status point (0=OK, 1=Fault). It can be
acknowledged with FAULT ACK (r0054, bit 7). Setting FAULT ACK (r0054, bit 7) resets the
fault (1=Reset Fault).
NOTE: It is possible that motor performance may be affected at low frequencies if parameter
P1310 falls under 50% (default value).
Warning Messages
Error Cause Diagnosis and Remedy Reaction
A0501, Current
limit
• Motor power > SED2
power.
• Motor cables are too
long.
• Ground faults.
Check the following:
• Motor power (P0307) SED2
power (P0206).
• Cable length limits must not
be exceeded.
• Motor cable and motor must
not have short circuits or
earth faults.
• Motor parameters must
match the motor in use.
• Value of stator resistance
(P0350) must be correct.
• The motor must not be
obstructed or overloaded.
• Increase ramp-up time.
• Reduce boost level.
--
A0502,
Overvoltage limit
• The overvoltage limit is
reached.
This warning may appear on
ramp-down if the DC link is
disabled (P1240 = 0).
If this warning is displayed
permanently, check the drive input
voltage or extend the ramp-down time
for the drive.
--
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. --