12 What to do, if ...
101
If a parameter in this tree
structure is changed, the
underlying parameters
must be checked for cor-
rectness and adjusted if
necessary.
... Relay output limit value
does not switch as
shown in the symbol
-The integrated fuse cut-out is defective,
caused by an excessive relay current.
h Check whether the relay option is available.
h Measure relay terminal 21 and 22 with a
continuity tester in standby mode (without
voltage supply).
h If continuity cannot be measured, the de-
vice must be repaired at JUMO.
v For service addresses see back cover
... The backlight is off. - Timeout lighting was activated.
The backlight switches off automatically after
the set time.
h Press any key
or switch off timeout.
v Chapter 7.3.5 "Time-out lighting"
Description Cause Remedy
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