59
8012704/YHS4/V2-0/2016-10 | SICK OPERATING INSTRUCTIONS | GM32
Subject to change without notice
CLEARING MALFUNCTIONS 7
CDR/
CDH
EL. too hot Mainte-
nance
Electronics too hot. Ambient temperature
too high?
Allow device to cool down.
Air purge low Volume flow below set limit. Check purge air supply.
Filter watch Flow monitor. Check purge air supply.
p no signal No signal from pressure sensor. Check purge air supply.
p out of range Sample gas pressure < 500 or > 1200
hPa (mbar).
---
t air no signal Broken sensor. Contact SICK Service.
[t] no signal Broken sensor.
EEPROM
defect
EEPROM defective.
Heat no signal Heater fault.
Heater < 1.5 A
Heater defect
Heating too
low
No com. Communication error to optic head and/
or reflector.
Check connection cables.
System Systemstart Xtended This message is entered during each sys-
tem start.
Shows when last system start was made.
Zero adjust The start of an adjustment is recorded in
the logbook.
Shows when last adjustment was made.
Boxmeasuring The start of filter box measurement is
recorded in the logbook.
Shows when last filter box measurement was
made.
Reflector
search
Search for reflector failed Check alignment, see “Alignment check (automatic
optical alignment check; option)”, page 45.
Reflector contaminated or defective.
Light intensity weakness too strong on measuring
path.
P Substitute
value
Mainte-
nance
Calculation is made with a substitute
value because of a pressure measure-
ment error.
The set input (probe, analog input, SCU) shows
errors and the substitute value is therefore used
for calculation.
T Substitute
value
Mainte-
nance
Calculation is made with a substitute
value because of a temperature measure-
ment error.
The set input (probe, analog input, SCU) of pres-
sure measurement shows errors and the substi-
tute value is therefore used for calculation.
Initia-
tor
[1]
Text Classifi-
cation
Description Possible causes/remedy
[2]
Table 17 Error messages
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