Code
Relay
K1
Explanation
Reaction of device
Remedial measures
4
de-energized, 13 -
14 interrupted
Failure of a phase
The device is provided with a built-in
phase-monitoring function for the mains
supply. In the event of a mains interrup-
tion (failure of a fuse or mains phase) the
unit switches off after a delay (approx.
15 s).
Only functioning with an adequate load
for the controller.
Following a shutoff, a startup attempt is
made after approximately 5 seconds, if
the voltage supply is high enough. This
keeps occurring until all 3 supply phases
are available again.
Check line voltage.
6
de-energized, 13 -
14 interrupted
IGBT Fault
Earth fault or short-circuit at inverter out-
put.
The device switches off, renewed at-
tempt to start after about 60 s
Code 9.
Final switch off when error is detected
after the third start attempt at an interval
< 60 s.
Reset by enable or line voltage ON/OFF.
7
de-energized, 13 -
14 interrupted
DC overvoltage
Intermediate circuit voltage below a fixed
limit for longer than 75 s.
The modulation is switched off immedi-
ately at undervoltage, error message
after 75 s.
Automatic switching back on and switch-
ing off of error message when the volt-
age exceeds the fixed limit for at least 5
s.
Check line voltage.
8
de-energized, 13 -
14 interrupted
Intermediate overvoltage
Intermediate circuit voltage above fixed
limit for longer than 75s.
Reason for excessively high line voltage
or alternator motor operation.
The modulation is switched off immedi-
ately at overvoltage, error message after
75 s.
Automatic switching back on and switch-
ing off of error message when the volt-
age drops below the fixed limit for at
least 15 s.
Check line voltage.
Prevent generator motor operation.
9
energized 13 - 14
bridged
IGBT cooling down period
IGBT cooling down period for approx.
60 sec.
Final shutoff after 2 cooling-off intervals
Code 6.
10
de-energized, 13 -
14 interrupted
Communication fault
MODBUS communication interrupted
description MODBUS communica-
tion
12
de-energized, 13 -
14 interrupted
Line voltage too low
Line voltage below a fixed limit for longer
than 75 s.
The modulation is switched off immedi-
ately at undervoltage, error message
after 75 s.
Automatic switching back on and switch-
ing off of error message when the volt-
age exceeds the fixed limit for at least
5 s.
Check line voltage.
13
de-energized, 13 -
14 interrupted
Line voltage too high
Line voltage above fixed limit for longer
than 75 s.
The modulation is switched off immedi-
ately at overvoltage, error message after
75 s.
Automatic switching back on and switch-
ing off of error message when the volt-
age drops below the fixed limit for at
least 15 s.
Check line voltage.
Operating Instructions Fcontrol Basic – model series FSDM2.5..50M Diagnostics / Faults
L-BAL-E162-GB 2022/02 Index 008 Part.-No.
23/30
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