Maintenance Request Alarm - Siemens LDS 6 Operating Instructions Manual

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
request
W4 Set clock
W5 Ambient Analyzer
W6 Ambient Channel
W7 Analog Out
W8 Error Handler Analyzer
W9 Error Handler Channel
W10 Data Flow Analyzer
W11 Data Flow Channel
W12 Compensation
Temperature Limit
W13 Compensation Pressure
Limit
LDS 6
Operating Instructions, 01/2009, A5E00295894-05
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 output.
Internal error log is full.
Internal error log is full.
Electronics failure in internal communication.
Electronics failure in internal communication.
External temperature signal is outside the limits.
External pressure signal is outside the limits.
5.2 Maintenance Request Alarm
Action
Contact service.
Contact service.
Check external equipment.
Set date and time.
Make sure that the ambient
temperature ranges between 5
°C - 45 °C and the ambient
pressure corresponds to a place
below 2000 m above the sea
level.
Make sure that the ambient
temperature ranges between 5
°C - 45 °C.
Re-calibration is necessary.
Contact service.
Contact service.
Contact service.
Contact service.
Contact service.
Check signal.
Make sure that the temperature is
within the limits specified in
function 83.
Check signal.
Make sure that the pressure is
within the limits specified in
function 82.
Alarms
67