Fuji Electric ZSS-8 Series Instruction Manual page 50

5.3.3.3 Alarm types
All the alarms except for "Connection Error" which indicates communication failure between the receiver
unit and the control unit will be activated after at least five minutes from the power on. The alarm of "Low
Light Transmission" is is triggered when the low light transmission status is continued for one minute, which
means that it takes six minutes after start-up of the analyzer.
Alarm display
LD Temp. Error
Laser temperature
control failure
Low Light Trans.
High Light Trans.
Overrange
Connection Error
LD communication
error
High Gas Temp.
Out of Range
Alarm contents
Peltier which is cooling the laser
cannot control the set temperature.
The analyzer cannot control the
laser temperature within the re-
quired time.
Light intensity required for the
measurement cannot be obtained.
Light quantity is too much for
measurement.
Signal input is too much.
Communication between receiver
unit and control unit does not occur
properly.
Communication between the trans-
mitter unit and the receiver unit
failed.
It is reported when exceeded gas
temperature is detected.
It is reported when exceeded gas
pressure is detected.
• Peltier failure
• Thermistor failure
• The receiver unit and the transmitter
unit are used at an installation location
exceeding the set range.
The unit is used in an environment
where the temperature of transmitter
unit is higher than 55°C
• The unit is used in an environment
where gas temperature is beyond the
specification.
• Light intensity is insufficient in an en-
vironment with high dust.
• Light intensity is insufficient in an en-
vironment with high water vapor.
• Contamination of window and conden-
sation are caused by insufficient air
purge.
• Optical path is blocked due to dust.
• Optical axis is deflected due to vibra-
tion.
• Optical axis is deflected due to distor-
tion of a stack.
• Optical axis is deflected due to external
faults.
• Optical path is too short
• Failure of PD analog board
• Failure of PD analog board
• Break of wiring
• Influence of high frequency noise
• Poor contacts of the connector unit
• CPU board failure
• PD digital board failure
• The actual gas temperature is more than
450°C.
• The value set to analog input on the
"Analog Input" screen is not correct.
• Actual gas pressure is outside the speci-
fication range.
• The value of the input range set on the
"Analog Input" screen is not correct.
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Probable causes
INZ-TN8ZSS-E