CARLO GAVAZZI RSBT Serie Manual De Instrucciones página 5

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
Carlo Gavazzi
7
Over-temperature
The RSBT 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.
The RSBT will only recover if the internal temperature is within
safe limits.
N/A
The alarm will self-recover - the recovery period will depend on
the cooling time required by RSBT. 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
Current not normal (during bypass)
The RSBT measures the current during bypass state. If the current
is > 1.15 * Ie for at least 1 second, the RSBT will trigger this alarm
and switch OFF the output. This condition can result in case of an
overload condition or because the RSBT moel is under-rated for
the load it is controlling.
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) to prform a hard reset. This
will reset the alarm.
•
Check that the correct model of RSBT is being used
•
Check that the connections to the compressor are
correct
•
Measure the current with a clamp meter on any of L1,
L2, L3 phases and check if the current is within the
expected levels. If the current is higher than the RSBT
rated current, change the RSBT to a larger model.
9
Supply voltage unbalance
The RSBT measures the voltages on all the three phases and if
there is a difference of more than 10% for ≥ 5 sec between any of
the phases, the RSBT will trigger the voltage unbalance alarm.
5 minutes
N/A
The alarm will start a self-recovery of 5 minutes from the moment
the voltage on L1, L2, L3 are within 10% of each other. If the
voltage unbalance remains > 10%, the RSBT will reman in alarm
state.
•
Check for any loose connections on the mains and load-
side terminals
•
Check supply voltage level across L1, L2, L3 terminals
and see if there is any unbalance
•
Check resistance on motor windings to see if any of the
coils is damaged
RSBT Troubleshooting Guide – Rev 1.0
EN
5