Alarm messages
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isoxx1685Dx-x25_D00272_07_M_XXEN/09.2022
11. Alarm messages
Alarm message Description Action LED indicators
Alarm 1 (insulation
fault)
The insulation resis-
tance is lower than the
response value R
an1
• Determine cause of the insulation fault and elimi-
nate it.
ALARM 1 lights up
Alarm 2 (insulation
fault)
The insulation resis-
tance is lower than the
response value R
an2
• Determine cause of the insulation fault and elimi-
nate it.
ALARM 2 lights up
Check L1-L2 for
correct connection
Connection fault sys-
tem
• Check the wiring of terminals L1/+, and L2/- to
the IT system
• Press the TEST button
• Check mains voltage
• Check fuses
ALARM 1 + ALARM 2
flash in common mode
Check E-KE connec-
tions for interrup-
tions
Connection fault. E/KE
not connected to PE
• Check wiring of terminals E and KE to earth (PE)
• Press the TEST button
ALARM 1 + ALARM 2
flash in common mode
Device error x.xx Internal device error
• Press the TEST button
• Switch the supply voltage on and off
•Contact Bender Service
SERVICE lights up
Overtemperature
coupling
Overtemperature cou-
pling terminal L1/+ or
L2/–
• Check mains voltage level and eliminate any exis-
ting insulation faults. After cooling down, the
device switches on again automatically at a tem-
perature of 80 °C. This device behaviour is normal
if a high mains voltage and low insulation fault
resistance have been selected.
SERVICE lights up
Overtemperature
PGH (isoxx1685DP)
Overtemperature of
the locating current
injector
• Wait for the end of the cool-down period SERVICE lights up
Check date and
time!
Date and time have
not been set yet
• Set local date and time
(in case of voltage failure buffer for three days)