JUMO AQUIS touch S Assembly Instructions Manual page 131

Fault symptom
Some of the connected sen-
sors malfunction sporadical-
ly.
(bus status appears as "Yel-
low" in the title bar of the
user interface and in the
a
"Alarm list")
Individual sensors malfunc-
tion continuously.
("Bus fault" is signaled in the
title bar of the user interface
and in the "Alarm list")
All sensors connected to the
bus simultaneously mal-
function continuously.
("Bus fault" is signaled in the
title bar of the user interface
and in the "Alarm list")
a
See Chapter 8.3.1 "Alarm list", page 103 if a "Bus fault" is signaled.
Possible cause
Poor contact in the bus cabling
Poor contact in the bus cabling
Defect in the sensor electronics
The bus voltage supply has failed. Diagnose the failure of the voltage
21 Annex
Remedy
Check for reliable contact at all
plug connectors and terminals in
the JUMO AQUIS touch S. In-
spect the cabling for damage.
The occurrence and clearing of
bus faults is recorded in the
"Event list". This allows you to use
the entries to investigate sporadic
bus faults.
Check for reliable contact at all
plug connectors and terminals in
the JUMO AQUIS touch S. In-
spect the cabling for damage.
Replace the sensor electronics.
supply with a multimeter and re-
place the faulty voltage source or
correct the short-circuit in the volt-
age supply.
131