24
Fnr
Type of fault
Corrective measures
53
Temperature of the probe above
the operating temperature range
(-32°C...170°C).
Reduce medium temperature.
52
Short circuit measuring element 1
(NTC).
Replace the unit.
(Sensor backup is possible).
1)
54
Temperature of the probe below
the operating temperature range
(-32°C...170°C).
Increase medium temperature.
59
Both sensor elements faulty.
Replace the unit.
61
Interruption measuring element 2
(Pt 1000).
Replace the unit.
(Sensor backup is possible).
1)
62
Short circuit measuring element 2
(Pt 1000).
Replace the unit.
(Sensor backup is possible).
1)
71
Detected sensor drift
exceeds warning level.
First indication of drift detected,
prepare replacement of the unit.
Check if the parameter
drW
is
programmed correctly.
72
Detected sensor drift
exceeds alarm level.
Drift exceeds alarm threshold,
replace the unit, temperature
measurement with reduced
accuracy possible.
Check if the parameter
drA
is
programmed correctly.
91
Supply voltage outside the
operating voltage range.
Check the supply voltage, provide
the indicated voltage.
92
Operating temperature of the
electronics outside the specified
range.
Check the temperature of the
sensor top; ensure that the speci-
fied range is observed.
1)
Setting of parameter
drEd
: "
On
" or "
Ondr
".
