CARLO GAVAZZI HDMS Manual Del Usuario 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
Number of flashes
Alarm
Alarm description
Alarm recovery period
Consecutive alarms for
hard reset
Action to recover alarm
Troubleshooting
22/02/19 HDMS Troubleshooting Guide - Rev 1.0
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.
The HDMS will only recover if the internal temperature is within safe limits.
5
The alarm will recover automatically. The recovery time will vary according to the cooling
time required by HDMS. In any case it wil be 5 minutes or longer.
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
9
Microcontroller reset
In the case there is a microcontroller reset during power-up sequence (i.e. when user ap-
plies mains power), the HDMS will trigger this alarm.
5 minutes
N/A
The alarm will self-recover (in auto-recovery mode) after 5 minutes.
• Check for possible external noise sources such as large mechanical contactors installed
in close proximity to the HDMS.
10
Shorted power unit
The HDMS will trigger this alarm when it detects a current flow during idle state or when
voltage is present on main winding when main relay SCRs are energised.
5 minutes
N/A
The alarm does not self-recover.
• Check if problem is cleared by resetting the power
• If problem persists contact your Carlo Gavazzi representative
Fully ON
Internal fault
In case there is an internal fault in the HDMS circuitry, the Red LED will remain continu-
ously 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 if problem is cleared by resetting the power through L1/L, L2/N.
• If the alarm persists, replace the device.
• If any of the SCRs is damaged, replace the soft starter.
EN
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Carlo Gavazzi Ltd.