Maintenance Request Alarm - Siemens LDS 6 Operating Instructions Manual

Alarms

5.2 Maintenance request alarm

The output of messages can become inconvenient particularly during test runs. Therefore this
function can be switched off using function 88. It is not recommended to use this facility during
normal operation.
Relays
If the relay outputs of the analyzer have been configured accordingly, it is possible to output a
signal when an alarm occurs.
Stored Value
The analog output can be set to the last measured value or to 3 mA when an alarm occurs
(function 77). This response signal is only possible for "Fault alarm", "Transmission alarm",
"Transmission pending" and "Function control alarm".
See also
Configuration (Page 49)
5.2 Maintenance request alarm
A "Maintenance request" alarm is set when a modification of the analyzer is needed. The
measuring ability of the analyzer may not be affected during the time this alarm is active.
However, to guarantee reliable measurement in the future, it may be necessary to carry out
corrective measures.
The following table shows the different alarm messages signaling for maintenance request that
can appear in the logbook. These can be individually deactivated using function 88.
Table 5-2 Alarm messages
No. Error Message
W1 Opto module
W2 Laser current
W3 External maintenance re‐
quest
W4 Set clock
W5 Ambient Analyzer
W6 Ambient Channel
W7 Analog In
W8 Error Handler Analyzer
60
Possible Causes
Laser damage.
Leaking reference cell.
Reference cell displacement.
Electronics damage.
Change of laser current due to aging of laser.
Maintenance request from outside.
LDS 6 has been switched off.
Ambient temperature or pressure is beyond limits
specified in technical data.
Ambient temperature is outside limits specified in
technical data.
Error in calibration of analog input.
Internal error log is full.
Action
Contact service.
Contact service.
Check external equipment.
Set date and time.
Make sure that the ambient tem‐
perature ranges between 5 °C - 45
°C and the ambient pressure corre‐
sponds to a place below 2000 m
above the sea level.
Make sure that the ambient tem‐
perature ranges between 5 °C - 45
°C.
Re-calibration is necessary. Con‐
tact service.
Contact service.
Operating Instructions, 01/2022, A5E00295894-10
LDS 6