Endress+Hauser Levelflex M FMP45 - Troubleshooting Instructions

Levelflex M 15 Trouble-shooting
Endress+Hauser 75
15.1 Troubleshooting instructions
L00-FMP4xxxx-19-00-00-en-010
Instrument does
not respond
Check voltage and
compare it with the
specifications on the
nameplate.
Connect the
correct voltage
Instrument works? Ready
Check the polarity
of the voltage.
Check power connection
to electronic board
Correct the polarity
Connect plug
Instrument works?
Instrument works?
Ready
Ready
Values on display
invissible
ok
ok
ok
Yes
Yes
Yes
No
No
No
No
Not ok
Not ok
Not ok
Check plug contact
of the display.
Connect the plug
correctly
Correct configuration
Display works?
Ready
Ready
Yes
ok
No
Not ok
Yes
No
Levelflex M -Trouble Shooting
ok
Output current between
3.6 …22mA ?
Contrast:
FO+
The display is possibly defective.
Contact Endress+Hauser Service
Yes
Output current
< 3.6 mA ? (2 wire)
< 2.4 mA ? (4 wire)
No
Check cabling
Correct the
cabling
Current is ok? Ready
Yes
No
Possibly defective electronics
Contact Endress+Hauser Service
HART
communication
does not
function
Is the communication
resistor installed
according to the
OM?
Install the fuse
(see the OM)
Communication ok?
Ready
Ready
ok
Yes
Yes
No
No
Connect the
Commubox
(see the OM)
Communication ok?
Ready
Set the switch
correctly
Communication ok
Ready
Ready
Contact ServiceEndress+Hauser
Contact ServiceEndress+Hauser
Contact Endress+Hauser Service
ok
ok
ok
Yes
No
Yes
Yes
No
No
ok
Not ok
Not ok
Not ok
Not ok
Not ok
Not ok
?
Is the switch on the
Commubox for
selecting HART
in the correct position?
Is the Commubox
connected according
to the OM?
Communication
via Service adapter
does not function
Instrument
measures
incorrectly
Check configuration
of COM port on PC
Check basic setup
Proceed according
to section
'Trouble shooting’ in OM
Repeat
basic setup
Not ok
Yes
Yes
Yes
Yes
Yes
Communication
PA does not
function
Check cabling +
terminator
EMC interference?
ok
Correct cabling +
terminator
Not ok
Check screening
(see BA Section
'Connection’)
Yes
Communication ok?
Communication ok?
Measurement ok?
Ready
Yes
No
Communication ok?
Ready
Yes
No