7
. MAINTENANCE
7.1 Fault finding during commissioning
If a BA444DF-P fails to function during
commissioning the following procedure should be
followed:
Symptom
Cause
Check:
No Display
Instrument not
correctly
connected or
powered.
Between
terminals 1 & 2:
FISCO 9 & 17.5V
Ex ia 9 to 22V
Ex ic 9 & 32V
Displays
‘no ConF’
No inputs are
enabled.
Configuration of
each input.
Displays
‘no dAtA’
No data being
received with the
current
configuration.
Addresses and
Index are correct.
That data has
DS-33 format.
Display shows
‘9.9.9.9.9’ with all
decimal points
flashing; all
bargraph
segments
activated and
bargraph scale
flashing.
Value
over-range
Configuration.
and
decimal point
position.
Display shows
‘-9.9.9.9.9’ with
all decimal points
flashing; no
bargraph
segments
activated and
bargraph scale
flashing.
Value
under-range
Configuration
And
Decimal point
position.
Display
alternates
between value
and the word
‘bAd’. Bargraph
flashes.
Status of fieldbus
variable has a
quality of ‘BAD’
or a fault state is
active.
Fieldbus
configuration.
Bargraph scale
flashes.
Process variable
is outside the
limits defined for
the bargraph.
Bargraph
configuration.
All display
segments
activated.
Display is
initialising.
This is normal
operation, after a
few seconds the
model number
followed by the
firmware version
will be displayed
prior to entering
the display mode.
7.2 Fault finding after commissioning
ENSURE PLANT SAFETY BEFORE
STARTING MAINTENANCE
Live maintenance is permitted on intrinsically
safe equipment installed in a hazardous area,
but only certified test equipment should be
used unless a gas clearance certificate is
available.
If a BA444DF-P fails after it has been
functioning correctly, the table shown in section
7.1 may help to identify the cause of the failure.
If this procedure does not reveal the cause of the
fault, it is recommended that the instrument is
replaced.
7.3 Servicing
We recommend that faulty BA444DF-P PROFIBUS
PA Indicators are returned to BEKA associates or
to our local agent for repair.
7.4 Routine maintenance
The mechanical and electrical condition of the
instrument should be regularly checked. Initially
annual inspections are recommended, but the
inspection frequency should be adjusted to suit the
environmental conditions.
7.5 Guarantee
Instruments which fail within the guarantee period
should be returned to BEKA associates or our local
agent. It is helpful if a brief description of the fault
symptoms is provided.
7.6 Customer comments
BEKA associates is always pleased to receive
comments from customers about our products and
services. All communications are acknowledged
and whenever possible, suggestions are
implemented.
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