Endress+Hauser Liquisys M COM 223 F, Operating Instructions Manual

Page: 60 / 82

Error Possible cause Tests and / or remedial measures Equipment, spare parts, personnel
Display on, but
– no change in
display and / or
– instrument cannot be
operated
– Instrument or module in
instrument incorrectly installed
COM 223 F:Reinstall
module
COM 253 F:Reinstall display
module
Carry out using installation
diagrams, Chap. 8.2.1 and 8.3.1
– Impermissible operating system
state
Switch instrument off and back on Possible EMC problem: if problem
persists, call E+H Service to have
installation checked
Instrument gets hot – Incorrect voltage / too high Compare mains voltage and rating
on nameplate Correct voltage setting, s. Chap.
8.4.1 / 8.5.1
– Power supply unit defective Replace power supply unit Can only be diagnosed by E+H
Service
Measured value O
2
and / or
measured value
temperature incorrect
– Transmitter module defective
(Module: MKO1).
First perform tests and take
measures acc. to Chap. 7.3 to
eliminate the sensor or wiring as
the cause of the error.
Test measuring inputs:
– connect equivalent resistances
for oxygen and temperature,
s. chapter 8.8.1
If test negative: Replace module
(check variants), Carry out using
the explosion drawings Chap. 8.2.1
and 8.3.1.
If test positive: check peripherals
once more.
– Incorrect sensor current Sensor current can be displayed in
meas. mode by pressing the “+” key
3 times Display in nA. Nominal value in air
for 20 °C and 1013 hPa: 290 nA
(COS 21)
Pressure value
incorrect / cannot be
read – Pressure sensor defective MKOH module defective Pressure can be read in field S 11.
Caution: The absolute air pressure
is displayed.
– Pressure sensor does not exist MKOH module without sensor
installed (instrument without Plus
packet) Upgrade to Plus packet if
necessary.
Contact your E+H Sales Agency!
Current output,
incorrect current value – Not calibrated correctly
Test with built-in current simulation,
connecting mA meter directly to
current output.
Check whether 0–20 mA or
4–20 mA has been selected
If simulation value is incorrect:
recalibration at factory or new
LSCxx module required.
If simulation value is correct:
check current loop for load and
shunts.
– Load excessive
– Shunt / short-circuit to frame in
current loop
– Incorrect mode of operation
No current output signal – Current output stage defective
(module: LSCH/LSCP)
Test with built-in current simulation,
connecting mA meter directly to
current output. First disconnect
current output line completely for
safety. If test fails:
Replace controller
(using correct variant)
Additional relay not
functioning – COM 253 F: Ribbon cable
Pos. 320 loose or defective
Check ribbon cable base, if
necessary replace cable see Spare parts COM 253 F
Only 2 additional relays
can be used – Relay module LSR1-2 with 2
relays installed
Convert to LSR1-4 with 4 relays Operator or E+H Service
Enhanced functions
(Plus packet) not
available – No or incorrect release code
used
If upgraded: verify that correct
serial number has been used to
order Plus packet Handled by E+H Sales
– Incorrect instrument serial
number stored in LSCH/LSCP
module
Check whether serial number on
nameplate matches serial number
of LSCH/LSCP (field S8) Instrument serial number is
required to enable Plus packet.
Additional functions
(Plus packet and / or
Chemoclean) missing
after replacement of
LSCH/LSCP module – Release Plus packet or
Chemoclean unavailable.
For brand new LSCH / LSCP with
SNR you can enter an instrument
serial number
once in fields E115
to E117. Then, if necessary, enter
release codes for Plus packet and /
or Chemoclean.
For detailed description, see Chap.
658.5.5
No HART or
PROFIBUS-PA/-DP
interface function – Wrong controller HART: LSCH-H1 or -H2
Profibus PA/DP: LSCP-PA/DP
see Field E112 Replace controller;
User or E+H Service
– Incorrect software Device software see Field E111
– Bus problem Remove some instruments and
retest Contact E+H service
Diagnostics and corrective maintenance Liquisys M COM 223 F / 253 F
58 Hauser