Fuji Electric ZSS-8 Series, Instruction Manual

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INZ-TN8ZSS-E
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 Alarm contents Probable causes
LD Temp. Error Peltier which is cooling the laser
cannot control the set temperature. • 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.
Laser temperature
control failure The analyzer cannot control the
laser temperature within the re-
quired time.
Low Light Trans. Light intensity required for the
measurement cannot be obtained.
•
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.
High Light Trans. Light quantity is too much for
measurement. • Optical path is too short
• Failure of PD analog board
Overrange Signal input is too much.
•
Failure of PD analog board
Connection Error Communication between receiver
unit and control unit does not occur
properly. • Break of wiring
• Influence of high frequency noise
• Poor contacts of the connector unit
• CPU board failure
• PD digital board failure
LD communication
error Communication between the trans-
mitter unit and the receiver unit
failed.
High Gas Temp. It is reported when exceeded gas
temperature is detected. • The actual gas temperature is more than
450°C.
• The value set to analog input on the
“Analog Input” screen is not correct.
Out of Range It is reported when exceeded gas
pressure is detected. • Actual gas pressure is outside the speci-
fication range.
• The value of the input range set on the
“Analog Input” screen is not correct.