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Troubleshooting
Number of flashes
Alarm
Alarm description
Alarm recovery period
Consecutive alarms for hard reset
Action to recover alarm
Troubleshooting
Number of flashes
Alarm
Alarm description
Alarm recovery period
Consecutive alarms for hard reset
Action to recover alarm
Troubleshooting
Number of flashes
Alarm
Alarm description
Alarm recovery period
Consecutive alarms for hard reset
Action to recover alarm
Troubleshooting
14/06/2023
RSBD Troubleshooting Guide - Rev 1.0
5
Locked rotor condition (during ramp)
If a current >= 4 * Ie for 100 msec is detected, the RSBD will issue the locked
rotor alarm.
5 minutes
2
The alarm will self-recover after 5 minutes. If the soft starter remains in alarm
for more than 5 minutes (due to consecutive alarms) then a power reset (reset
of L1, L2, L3 for RSBD40 and reset of A1, A2 for RSBD60 models) is required.
•
Check that the RSBD model is suitably rated for the motor.
•
Check motor windings resistance to check if motor is damaged.
6
Ramp-up time (> 1 sec)
The RSBD will trigger this alarm if the compressor does not reach full speed
within 1 second. This alarm protects the bypass relays from switching a high
current.
5 minutes
2
The alarm will self-recover after a period of 5 minutes.
If the alarm is triggered twice consecutively, then the user must switch OFF
and then ON the mains (L1, L2, L3 or A1, A2 for RSBD60 models) to perform
a hard reset. This will reset the alarm.
•
Check that the correct model of RSBD is being used
•
Check that the connections to the compressor are correct
•
Check for any mechanical blockage on the compressor
7
Over-temperature
The RSBD constantly measures the heatsink and thyristors (SCRs) temper-
ature. If the maximum internal temperature is exceeded (for a minimum of
0.5 sec) an over-temperature alarm is triggered. This condition can be
triggered by too many starts per hour, an over-load condition during starting
and/or stopping or a high surrounding temperature.
Depends on the cooling period.
The RSBD will only recover if the internal temperature is within safe limits.
4
The alarm will self-recover - the recovery period will depend on the cooling
time required by RSBD. The higher the surrounding temperature, the longer
the cooling period.
•
Check that the specified number of starts/hr are not exceeded.
•
Check that the surrounding temperature around the soft starter is within
limits.
EN
4
Carlo Gavazzi Ltd.
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