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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
Carlo Gavazzi
7
Over-temperature
The RSGT constantly measures the heatsink and thyristors
(SCRs) temperature. 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.
(If MANUAL reset mode is applied, alarm can be reset by
pressing the Test/ Reset button).
The RSGT will only recover if the internal temperature is within
safe limits.
5
The alarm will self-recover (in Auto-recovery mode) - the recovery
period will depend on the cooling time required by RSGT. The
higher the surrounding temperature, the longer the cooling period.
Check that the specified number of starts/hr is not
exceeded.
Check that the surrounding temperature around the soft
starter is within limits.
8
Overload
The overload alarm can be triggered in case of the following
conditions:
Measured current > 1.05 x FLC during transition from ramp-up to
bypass.
Load current > FLC. Trip time will vary according to Trip Class 10.
Depends on the cooling period.
(If manual reset mode is applied, alarm can be reset by pressing
the Test/ Reset button).
The RSGT will only recover if the internal temperature is within
safe limits.
4
The alarm will recover automatically after 5 minutes. If manual
reset mode is enabled, press Test/Reset button.
Note: allow enough time for the motor to cool before attempting
the next start.
Make sure that the FLC setting is according to the
current on the motor name plate.
Check for any blockages in the load.
If overload alarm occurs during ramp-up try to set a
shorter ramp-up time or increase the FLC setting.
RSGT Troubleshooting Guide – Rev 1.0
EN
5
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