Liquisys M CLM223/253 Diagnostics and troubleshooting
Endress+Hauser 89
Error Possible cause Tests/remedial action Execution, tools, spare
parts
Values appear on
display but:
• Display does not
change and / or
• Device cannot
be operated
Device or module in
device not correctly
mounted
Panel-mounted device: reinstall
insert.
Field device: remount display
module
Perform with the aid of the
installation drawings in the
the "Spare parts" section
Impermissible operating
system condition
Disconnect line voltage for
approx. 10 seconds
Possibly Possible EMC
problem: if this persists,
check the installation or have
checked by Endress+Hauser
Service
Device gets hot Voltage wrong/too high Compare line voltage and
nameplate data
User, electrical technician
Power unit defective Replace power unit Diagnosis only by Endress
+Hauser Service
Conductivity/MΩ
measured value
and/or
temperature
measured value
incorrect
Transmitter module
defective (module:
MKIC), please first carry
out tests and take
measures as per the
"Process-specific errors"
section
Measuring input test:
• Connect a resistor instead of
the conductivity sensor
• 100 Ω resistance at
terminals 11/ 12 + 13 =
display 0 °C
If the test is negative: replace
module (note version).
Perform with the aid of the
exploded drawings in the
"Spare parts" section.
Current output,
incorrect current
value
Incorrect adjustment Check with integrated current
simulation, connect mA meter
directly to current output.
If simulation value incorrect:
adjustment in factory or new
LSCH module required.
If simulation value correct:
check current loop for load
and shunts.
Load too large
Shunt / short to ground
in current loop
Incorrect mode of
operation
Check whether 0–20 mA or 4–
20 mA is selected.
No current output
signal
Current output stage
defective (only for LSCH
module; LSCP has no
current output)
Check with integrated current
simulation, connect mA meter
directly to current output
If test negative:
Replace central module (note
version)
Additional relays
not working
Field device: ribbon cable
loose or defective
Check ribbon cable seating,
replace cable if required.
See the "Spare parts" section
Only 2 additional
relays can be
triggered
LSR1-2 relay module
with 2 relays is installed
Upgrade to LSR1-4 with 4
relays.
User or Endress+Hauser
Service
Additional
functions (Plus
Package) missing
No or incorrect release
code used
If retrofitting: check whether
the correct serial number was
quoted when ordering the Plus
Package.
Handled by Endress+Hauser
Sales
Incorrect device serial
number saved in LSCH/
LSCP module
Check whether serial number
on the nameplate matches SNR
in LSCH/ LSCP (field S 8).
The serial number of the
device is definitive for the
Plus Package.
Additional
functions (Plus
Package and/or
Chemoclean)
missing after
LSCH/LSCP
module
replacement
Replacement modules
LSCH or LSCP have the
device serial number
0000 when they leave
the factory. The Plus
Package or Chemoclean
are not enabled on
leaving the factory.
In the case of LSCH/LSCP with
SNR 0000, a device serial
number can be entered once in
fields E115 to E117.
Then enter the release codes
for the Plus Package and/or
Chemoclean if necessary.
For a detailed description,
see the "Replacement of
central module" section.
No HART or
PROFIBUS PA/DP
interface function
Incorrect central module HART: LSCH-H1 or H2 module,
PROFIBUS-PA: LSCP-PA
module,
PROFIBUS-DP: LSCP-DP
module,
see field E112.
Replace central module;
User or Endress+Hauser
Service.
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