Bender ISOSCAN W Series - Alarm Messages

Alarm messages
10 Alarm messages
Alarm message Description Measures
•
“ALARM I
ΔL
” LED
lights up
•
Channel LED lights
up
The response value of the
insulation level is exceeded on
one channel.
•
Determine cause of the insulation fault and eliminate
it.
See “Insulation fault (ALARM I
ΔL
)”, page 34.
•
“ALARM I
Δn
” LED
lights up
•
Channel LED lights
up
The response value of the
residual current is exceeded on
one channel.
•
Determine cause of the exceeded residual current and
eliminate fault.
See “Residual current exceeded (ALARM I
Δn
)”, page 35.
•
“SERVICE” LED
lights up
Internal device error enum-title
•
Press the TEST button
•
Switch the supply voltage off and on
•
Read out error code on the ISOMETER®
•
Contact Bender service
See “Connection fault of the current transformers”,
page 35.
•
“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”,
page 35.
•
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 correspondingly. In this case, the alarm
LED and the channel LED of the faulty channel light up together for approx. two seconds.
56 EDS44x_D00201_10_M_XXEN/11.2023