Siemens ULTRAMAT 23 - Page 180

Error and system messages
11.2 Faults
ULTRAMAT 23
180 Manual, 3/2016, A5E37100388-003
Message
Possible causes
Remedy
Cable of detector faulty
AUTOCAL drift beyond tolerance Detector contaminated
Receiver chamber faulty
IR source power too low
EEPROM error
Checksum not OK
Read character does not correspond to
written character
Channel 1 not calibrated Calibration of full-scale value / sag miss-
ing
Channel 2 not calibrated Calibration of full-scale value / sag miss-
ing
Channel 3 not calibrated Calibration of full-scale value / sag miss-
ing
Voltage for IR source beyond toler-
ance
IR source not OK
Motherboard faulty
Bridge supply voltage outside toler-
ance
Channel amplifier faulty
Motherboard faulty
Half-bridge voltage outside tolerance
Channel amplifier faulty
Motherboard faulty
Lockin error
Channel amplifier faulty
Motherboard faulty
Sensitivity of O
2
sensor too low O
2
sensor faulty or no longer usable as
result of aging
Replace the O
2
sensor as described in
section
Replacing the electrochemical
oxygen sensor (Page 171)
External ADC error
Electronics faulty
External fault Signaling of an external fault (system-
specific)
Check the connected devices for faults
as described in section Configuration:
Inputs/outputs/pump: Binary/sync inputs
(Page 141).
H
2
S protection function Sample gas concentration too high Check sample gas, see also section
Probe protection function (Page 156)
Zero point of the H
2
S sensor beyond
tolerances
Purge time too short for calibration Repeat calibration
Sensitivity of H
2
S sensor too low
Sensor exhausted
Replace sensor