Endress+Hauser Liquisys M CCM223, Operating Instructions Manual

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Liquisys M CCM223/253 Diagnostics and troubleshooting
Hauser 83
7.4 Instrument-specific errors
The following table helps you during the diagnosis and points to any spare parts required.
Depending on the degree of difficulty and the measuring equipment present, diagnosis is
carried out by:
• Trained operator personnel
• The user's trained electrical technicians
• Company responsible for system installation/operation
• Hauser Service
Information on the exact spare part designations and on how to install these parts can be
found in the "Spare parts" section.
Error Possible cause Tests and/or remedial measures Execution, tools, spare parts
Device cannot be
operated, display value
9999
Operation locked
Press CAL and MINUS keys
simultaneously.
See "Function of keys" section.
Display dark, no light-
emitting diode active
No line voltage Check whether line voltage is present. Electrical technician/e.g. multimeter
Supply voltage wrong/too low
Compare actual line voltage and
nameplate data.
User
(data for energy supply company or
multimeter)
Connection faulty
Terminal not tightened;
insulation jammed;
wrong terminals used.
Electrical technician
Device fuse defective
Compare line voltage and the nameplate
data and replace fuse. Electrical technician/suitable fuse;
see drawing in "Spare parts" section.
Power unit defective Replace power unit, note variant.
On-site diagnosis by Hauser
Service, test module necessary
Central module defective Replace central module, note variant.
On-site diagnosis by Hauser
Service, test module necessary
CCM253: ribbon cable loose or
defective
Check ribbon cable, renew if necessary. See "Spare parts" section.
Display dark, light-
emitting diode active
Central module defective
(module: LSCH/LSCP)
Renew central module, note variant.
On-site diagnosis by Hauser
Service, test module necessary
Display is on but
– No change in display
and/or
– Device cannot be
operated
Device or module in device not
correctly mounted CCM223: reinstall module.
CCM253: reinstall display module. Perform with the aid of the installation
drawings in the "Spare parts" section.
Operating system in unpermitted
mode
Switch device off and then on again.
Poss. EMC problem: if this problem
persists, check the installation.
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 Hauser
Service
Incorrect Cl/ClO
2
measured value and/or
temperature measured
value
Transmitter module defective
(module: MKC1).
First carry out tests and action as per
chapter "Process-specific errors"
Measuring input test:
– Chlorine input open = reading
0.00mg/l
– Resistance 10k  at terminals 11/12
and 13 = reading 25 °C (77 °F)
If test negative: replace module (note
variant).
Perform with the aid of the exploded
drawings in the "Spare parts" section.
Current output, current
value incorrect
Adjustment not correct
Check with installed current simulation,
connect mA meter directly to current
output.
If simulation value incorrect: adjustment
in factory or new module LSCxx required.
If simulation value correct: check current
loop for load and shunts.
Load too big
Shunt/short to ground in current
loop
Incorrect mode of operation
Check whether 0–20 mA or 4–20 mA is
selected.
Incorrect assignment
Output 2 can be assigned to temperature
or pH Check which parameter is assigned to
output.