JUMO B 70.1050.0, Operating Instructions Manual

Page: 46 / 72

7 Alarm messages
The following alarm messages can be shown in the temperature display:
Error message Cause Elimination
Display overrun
The measured value is too large
and outside the range.
- Check sensor and connecting cable for damage
or short-circuit
- Check whether the correct sensor has been set
or connected
v
Chapter 4 “Commissioning the instrument”
Display underrun
The measured value is too small
and is outside the range.
Time for switch-on delay after
power-on has elapsed.
With display over/underrun, the
switch-on delay becomes
ineffective.
h
Cancel switch-on delay
with
+
Value has fallen below the low
alarm limit
h
Depending on the controller type, check whether
the heating or cooling unit functions faultlessly.
h
Check whether the installed relay fuse is still in
good working order.
The alarm disappears as soon as the process value goes
above or below the AL limits by the amount of the hysteresis.
Value has gone above the high
alarm limit
These messages are only output to
the temperature display.
H