JUMO B70.1170.0, Operating Manual

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15 What to do, if ...
2011-03-13
52
15 What to do, if ...
Description Cause Remedy
The following appears in
the display: Set-up program transmits data.
The monitoring function is briefly deactivated
during data transmission and the device
restarted.
- Wait until data transmission is completed.
The measured value
flashes in the top display. The device is in the alarm range
LED K1 is lit red.
The measured value flashes in the display and is
higher or lower than the limit value depending on
the switching behavior set (direct or inverse).
- Measured value too high or too low
- Excessive deviation between the
temperature values during differential value
calculation
h
Press twice and check the limit value.
h
Find out why the limit value is exceeded or
gone below.
h
If necessary, correct the limit value
h
If necessary, reduce an excessive hysteresis
because it might be too high in the valid
range.
v
Chapter 7.5 „C115 Switching behavior“
LED K1 is lit red,
although the measure
value is in the valid range The device is set as a temperature limiter
(TB).
Even if the measured value is already in the valid
range after being exceeded, the relay output of a
temperature monitor does not automatically re-
set.
It must be unlocked manually.
h
Press the key >3sec to manually un-
lock the relay.