Alarms - BEL LDD240-WU User Manual

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4.6 ALARMS

4.6.1 OUTPUT SHORT CIRCUIT
The "Short Circuit (SC)" error message appears when a short circuit is detected at the output.
In this case the output is switched off and then restarted after 10 seconds. This cycle is repeated until the short
circuit is removed.
4.6.2 OUTPUT OVERLOAD
The "Overload (OL)" error message appears when the output current exceeds Imax; it is only applicable when
"hiccup mode" current limitation is selected. In this case the output is switched off after 5 seconds of continuous
overload and then restarted after 10 seconds. This cycle is repeated until the output current is reduced below Imax.
4.6.3 OVER TEMPERATURE WARNING
The "Over Temperature warning (Ht)" appears when the internal temperature is reaching unusually high levels. If
no modification of the ambient operating temperature and / or load conditions is performed by the user, it is highly
possible that an "Over Temperature (Ot)" error occurs, leading to the output switch off.
4.6.4 OVER TEMPERATURE ERROR
The "Over Temperature (Ot)" error message appears when the internal temperature exceeds the safe limits. In this
case the output is switched off. The output is switched back on when the temperature decreased to safe limits. In
case of repeated Over Temperature errors check the device ventilation and/or reduce ambient temperature.
4.6.5 USB POWER
When the device is only connected to a USB device with no input voltage applied this information is shown on the
display. The output is switched off but the user can however configure the device parameters and / or update the
firmware.
4.6.6 OUTPUT OVER VOLTAGE
In case of an internal DC/DC converter defect, if the measured voltage exceeds the set voltage of 15% the output is
shut down and the alarm signaled.
USER MANUAL
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