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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
* For RSBD..55 to RSBD..95 models only.
14/06/2023
RSBD Troubleshooting Guide - Rev 1.0
8
Current not normal (during bypass)
The RSBD measures the current during bypass state. If the current is >1.15 *
Ie for at least 1 second, the RSBD will trigger this alarm and switch OFF the
output. This condition can result in case of an overload condition or because
the RSBD model under-rated for the load it is controlling.
If the current unbalance exceeds 20%.
5 minutes
5
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.
•
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 RSBD rated current, change the RSBD to a larger model.
9
Supply voltage unbalance
The RSBD monitors the voltage levels on all the phases and if it measures a
difference of at least 10% between any of L1, L2, L3 for at least 5 seconds,
the alarm 9 will be triggered. When the alarm is triggered the RSBD will switch
OFF the output.
5 minutes (from the moment the %voltage unbalance between all the phases
is < 10%)
N/A
The alarm will start a self-recvery of 5 minutes from the moment the voltages
on L1, L2, L3 are within 10% of each other. If the voltage unbalance remains
>10%, the RSBD will remain in alarm state.
•
Check for any loose connections on the mains and load side.
•
Check voltage across L1 - L2, L2 - L3, L1 - L3 and see if there is any
unbalance.
•
Check resistance on motor windings to see if any of the coils are damaged.
Fully ON *
Internal fault
In case there is an internal fault in the RSBD circuitry, the Red LED will remain
continuously ON.
-
1
Note: this alarm is not resettable and it is suggested to replace the unit and
contact a Carlo Gavazzi representative should this alarm occur.
•
Check resistance across L1 - T1 and L3 - T3 to check for any short.
•
If any of the SCRs is damaged, replace the soft starter.
EN
5
Carlo Gavazzi Ltd.
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