Endress+Hauser Mycom S CLM 153 Operating Instructions Manual page 91

Mycom S CLM 153
Error
Instrument Instrument hardware is locked via
unconfigurable, keypad (Keys "CAL" + "DIAG"
Display for code prompt simultaneously = security locking)
is 9999
Permanent, incorrect Sensor does not immerse
measured value completely
Air cushion in assembly
Earth fault at or in the instrument
Instrument in impermissible
operating state (no response on
pressing key)
Incorrect temperature Incorrect sensor connection
reading
Measuring cable defective
Incorrect sensor type selected
Sensor defective
Measured values Interference in measuring cable
fluctuate
Faults in signal output line
Div. controller, timer or Relay module not available for relay
clean functions cannot 3 - 5
be activated
Controller / limit contact Controller switched off
does not work
Controller in "Manual / Off" mode
Pick-up delay setting too long
"Hold" function active
"Auto hold" during calibration
"Hold" input activated
Manual "hold" active using keypad
"Hold" active during configuration
Controller / limit contact Contact in "Manual/on" mode
work continuously
Dropout delay setting too long
Control circuit interrupted
No conductivity/mV Line open or short-circuited
current output signal
Output defective
Fixed current Current simulation active
output signal
Processor system inactive
"Hold" is active.
Endress+Hauser
8.1.2 Process-specific errors
Possible cause Remedial action
Press "MEAS" and "PARAM"
simultaneously to unlock.
Check installation position
Check assembly and installation
position
Test measurement in insulated vessel,
possibly with calibration solution
Switch instrument off and on
Check connections using wiring
diagram
Check cable
Set sensor type on instrument (Field
141)
Check sensor
Connect cable screens as per terminal
diagram
Check line installation, possibly
route line separately.
Install 3 relay module M3R-3
Activate controller s. chap. 6.4
Select "Auto" or "Manual on" mode.
Switch off or shorten pick-up delay
period
Determine cause of hold and eliminate
if not desired
Set controller to "Manual/off" or "Auto".
Shorted dropout delay period
Check measured variable, current
output or relay contacts, actuators,
chemical supply
Disconnect both (!) lines and measure
directly on instrument
Replace controller module
Switch off simulation
Switch instrument off and on
"Hold" status see display.
8 Troubleshooting
Equipment needed, spare
parts
Plastic vessel, calibration solutions.
Behaviour, when instrument is
connected to process?
EMC problem: If repeated, check
grounding and wire routing
Wiring diagram s. chap. 4.1.1
Ohmmeter
Check temperature sensor with
Ohmmeter.
Wiring diagram s. chap. 4.1.1
Order number and installation
s. page 95.
Keypad / PARAM / manual operation /
contacts
"Hold" is indicated in display when
active
mA meter 0–20 mA DC
s. DIAG / Service / Simulation
EMC problem: If repeated, check
installation
91