User Manual

7 Alarm messages

The following alarm messages may appear 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

outside the range.

Service interval elapsed

The time that was set for the

maintenance of a heating or cooling

unit has elapsed.

h Carry out service

h At the parameter level, reset

manually to 0

v Chapter 4 “Commissioning the instrument”

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 is still

functioning faultlessly.

h Check whether any relay fuse that may have

been installed is still in good working order.

The alarm disappears as soon as PV goes above or be-

low the AL limits by the amount of the hysteresis.

Value has gone above the high alarm

limit

These messages are only output to the

process value display.

ProcVal