Endress+Hauser Liquisys M CCM223 - Process-Specific Errors

Liquisys M CCM223/253 Diagnostics and troubleshooting
Endress+Hauser 89
Error
No.
Display Tests/remedial action Alarm
contact
Error
current
Autom.
cleaning
start
PROFIBU
S
Status
Facty Facty Facty PV
1)
User User User Temp
E170 Flow through
assembly too low or
zero
Restore flow. Check
medium pipe.
Yes No No X
X
E171 Flow in main stream
too low or zero
Restore flow. Yes No No X
X
E172 Switch-off limit for
current input exceeded
Check process variables at
sending measuring device.
Change range assignment
if necessary.
Yes No No X
X
E173 Current input < 4 mA Yes No No X
X
E174 Current input > 20 mA Yes No No X
X
1) PV = process variable, primary value
8.3 Process-specific errors
Use the following table to localize and rectify any errors occurring.
Error Possible cause Tests/remedial action Tools, spare parts
No device function Device fuse defective Replace fuse Fine-wire fuse, M 250 V /
3.15 A
No power supply Establish power supply Check with voltmeter
Display flashes Automatic controller
switch-off due to alarm
Determine cause according to
error code Exxx and eliminate.
Current output simulation End the simulation
Chlorine
measurement:
Slope too low
Sensor was in chlorine-
free water or in air.
Short conditioning over (not in!)
chlorine bleach, wait for
conditioning time in water
before calibration.
Chlorine bleach / chlorine
parent solution
No match with
DPD control
measurement
Measurement takes place
without pH compensation,
while DPD measurement is
always buffered to pH 6.3.
Measure chlorine value pH-
compensated
Select CCM223/253 with
ES option (manual
compensation) or EP
(automatic compensation).
DPD measured
value much too
high
Organic chlorination agent
used (may also be used
only at times or for shock
chlorination). In this case,
no correlation between
actual free chlorine, DPD
measurement and
amperometric
measurement. DPD value
too high by a factor of up
to 5.
Use free (gaseous) chlorine or
chlorine from inorganic chlorine
compounds.
If organic chlorination
agent was used previously,
the entire system must be
evacuated and carefully
cleaned!
Chlorine value too
high
Membrane defective Replace membrane cap. Replacement cartridges
CCY 14-WP
Polarization not complete Wait for polarization time to
finish
Be patient
Foreign oxidizing agent Analyze medium Detailed knowledge of the
process