Alarm Messages - JUMO B 70.1050.0 Operating Instructions Manual

7

Alarm messages

The following alarm messages can be shown in the temperature display:
Error message Cause
Display overrun
The measured value is too large
and outside the range.
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.
Value has fallen below the low
alarm limit
Value has gone above the high
alarm limit
Elimination
- Check sensor and connecting cable for damage
or short-circuit
- Check whether the correct sensor has been set
or connected
v
H
Chapter 4 "Commissioning the instrument"
These messages are only output to
the temperature display.
h
Cancel switch-on delay
with +
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.