BEKA BA377NE, Manual

Page: 32 / 47

32
8. MAINTENANCE when configured as a Timer
8.1 Fault finding during commissioning
If a BA377NE fails to function as a Timer during
commissioning the following procedure should be
followed:
Symptom Cause Check:
No display No power
supply, or
incorrect wiring.
Note: Terminals
2, 6 & RS2 are
interconnected
within the
instrument.
That there is
between 10 and
30V on
terminals 1 & 2
with terminal 1
positive.
Instrument
configuration
menu does not
correspond with
Timer section of
this manual.
BA377NE may
be configured as
a clock.
That
FunCtion
in configuration
menu is set to
ELAP5E
not to
CloC
.
Timer will not
start.
Timer not reset
Set time
5Et t
has not been
entered.
Reset timer via
external contact
or by operating
*
and
&
buttons
simultaneously if
the local total
reset
r5Et enbL
has been
activated.
Enter a value for
5Et t'
other than
zero.
Timer will not
respond to
external input.
Input incorrectly
configured, or
sensor
incorrectly
connected.
Input
configuration
and input
energising link is
correctly fitted
for selected
sensor.
Control output(s)
do not function.
Control outputs
have not been
enabled.
Enable Control
Output(s) in the
configuration
menu.
Unable to enter
configuration
menu.
Incorrect security
code
That the correct
security code is
being used.
Contact BEKA if
code is lost.
8.2 Fault finding after commissioning
EN 60079-17 Electrical installations inspection and
maintenance permits live maintenance in Zone 2 if a
risk analysis demonstrates that this does not
introduce an unacceptable risk.
The removal of
covers [opening of Ex n enclosure] is permitted if
this can be done without contaminating the interior
of the instrument with dust or moisture. Some end-
users may prefer not to permit live maintenance to
minimise risk.
ENSURE PLANT SAFETY BEFORE
STARTING MAINTENANCE
Live maintenance within the hazardous area
should only be performed when it is
permitted by risk analysis, or when there is
no risk of a flammable atmosphere being
present.
If a BA377NE fails after it has been functioning
correctly, the following table may help to identify the
cause of the failure.
Symptom Cause Check:
No display No power supply That there is
between 10 and
30V on
terminals 1 & 2
with terminal 1
positive.
Timer will not
start.
Timer not reset
Reset terminals
RS1 & RS2 are
linked which will
inhibit Timer.
Reset timer via
external contact
or by operating
*
and
&
buttons
simultaneously if
local total reset
rE5Et . EnbL
has
been activated.
Remove link.
Control output(s)
do not function.
Control Outputs
have not been
enabled.
Enable Control
Output(s) in the
configuration
menu.
Unable to enter
configuration
menu.
Incorrect security
code
That the correct
security code is
being used.
Contact BEKA if
code is lost.