Megger TDS40, Operating Manual, Page: 65 / 71

7-65
Code
Cl. Operational
message
Description Input
09 F Unknown
master
The software version of
the master is not
compatible with the
software version of the
slave.
Insert Master Flash with
appropriate software
version
10 F Slave timeout Communication between
master and slave is
interrupted (master does
not respond any more).
LON Bus / wiring / power
supply
11 F Slave is locked The slave does not per-
form a task requested by
the master owing to
preceding errors.
Software trouble - must
not occur during
operation
12 F VOK
malfunction
The so-called operation
stand-by of module
"Control node VLF…"
has broken down.
Check hardware signal
VOK on module, check
cable between LON and
module
13 F SPI data error In the slave the exchange
of data between LON
node and module
"Control" is interrupted.
Hardware damage / EMC
trouble in module, check
cable between LON and
module
14 T Parameter error The slave does not per-
form any parameter
setting because the set of
parameters is faulty.
Software trouble - must
not occur during
operation
15 T Turn on failed Error when opening the
discharge unit and/or
when switching the HV
source(s) on.
Check return and control
lines to discharge unit
and HV sources
16 T NOT
DISCHARGED
Danger ! The system
cannot ensure proper dis-
charging after "HVOff".
Manually discharge by
external means, check
return and control lines to
discharge switches
17 T Turn off failed Error when closing the
earthing switch and/or
when switching the HV
source(s) off.
Check return message
and control lines to
discharge switches and
HV sources
18 N HVOn line error
In the slave the so-called
HV contactor (module:
K2) is reported switched
on in spite of being
locked
Check control line of
relay K2 as well as
hardware signal KISON
on module