PROGRAMMING
INSTRUCTIONS
SINUS PENTA
423/452
A046 Bypass Connector Fault
A046
Description
Precharge bypass connector fault.
Event
Auxiliary signal for the closing of the bypass connector of the short-circuit
precharge resistor is considered as closed before the relevant closing command is
sent.
See also
A045
.
Possible
cause
Precharge bypass connector reversed.
Precharge relay/contactor failure.
Solution
1. Reset the alarm: send a
RESET
command.
2. If the alarm persists, please contact BCH ELECTRIC LTD’s Customer Service.
A047 Undervoltage
A047
Description
DC bus Voltage lower than minimum voltage.
Event
Voltage measured in DC bus capacitors has dropped below the min. value allowed
for a proper operation of the drive class being used.
Possible
cause
Supply voltage has dropped below 200Vac–15% (class 2T), 380V–15% (class
4T), 500V –15% (class 5T), 600Vac –5% (class 6T).
Alarm
A047
can trip even when voltage temporarily drops below the allowable
min. value (which is caused for example by the direct starting of the connected
load).
If the drive is powered directly by the bus bar, the bus feeder is responsible for
the alarm.
Failure in DC bus voltage measure circuit.
Solution
1. Check voltage in terminals
R
,
S
,
T
. Check mains voltage value
M030
and DC
bus voltage value
M029
. Also check the values of
M030
and
M029
sampled in the
FAULT LIST
when
the alarm tripped.
2. If the alarm persists, please contact BCH ELECTRIC LTD’s Customer Service.