Bender EDS440-L - 11 Alarm Messages

EDS44x_D00201_07_M_XXDE/06.2020
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11. Alarm messages
Alarm message Description Measures Reference
• "ALARM I
L
" LED lights
up
• Channel LED lights up
The set response value of the insulation level has been
exceeded on one channel.
• Determine cause of the insulation fault and eliminate it.
see "Insulation fault (ALARM
IL)" on page 27
• "ALARM I
n
" LED lights
up
• Channel LED lights up
The set response value of the residual current has been
exceeded on one channel.
• Determine cause of the exceeded residual current and eliminate
fault.
see "Residual current
exceeded (ALARM In)" on
page 27
• "SERVICE" LED lights up Internal device error • Press the TEST button
• Switch the supply voltage off and on
• Read out error code on the corresponding ISOMETER®
• Contact Bender service
see "Connection fault of the
current transformers" on
page 28
• "SERVICE" LED lights up
• Channel LED flashes
Connection fault of the current transformers
Possible causes:
• Measuring current transformers defective
• Power supply cable interrupted
• Power supply cable short-circuited
• Replace defective measuring current transformers
•Check cables
see "Connection fault of the
current transformers" on
page 28
• Channel LED flashes Interferences during measurement
Possible causes:
• Low-frequency residual currents
• External magnetic fields
• Identify interference sources and eliminate them
If several alarm messages appear at a time, the indication changes corre-
spondingly. In this case, the alarm LED and the channel LED of the faulty
channel light up together for approx. two seconds.