Alarm Types - Fuji Electric FE ZSS Instruction Manual

5.3.1.9 Alarm types

Following types of alarm are displayed.
Alarm display
LD Failure
LD Temp. Error
Low Light Trans.
Connection Error
High Gas Temp.
Out of Range
AI Under
Box Temp. Warning
Alarm contents
Laser is faulty
Peltier which is cooling the laser
cannot control the set temperature.
Light transmission required for the
measurement cannot be obtained.
Communication between receiver
unit and transmitter unit does not
occur properly.
It is reported when exceeded gas
temperature is detected.
It is reported when exceeded gas
pressure is detected.
Input channel on the "AO Select"
screen.
It is reported when the temperature
in the receiver unit and the trans-
mitter unit exceeds the temperature
for normal operation.
• Failure caused by laser durability
• Peltier failure
• Thermocouple 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 gas temperature is beyond the
specification.
• Light transmission is insufficient in an
environment with high dust.
• Light transmission is insufficient in an
environment 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.
• Break of wiring
• Wrong wiring of RS-432 terminal
• 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
"AO Select" screen is not correct.
• Actual gas pressure is outside the speci-
fication range.
• The value of the input range set on the
"AO Select" screen is not correct.
• AI terminal is not connected to the ex-
ternal input device when channel setting
is set on the "AO Select" screen.
• AI terminal and setting channel do not
match.
• Input is not 4 to 20mA DC.
• The unit is used at an installation loca-
tion exceeding the set range.
• The unit is used in an environment
where gas temperature is beyond the
specification.
• Insufficient air purge causes rise in
temperature.
• The distance between the Receiver /
Transmitter unit and the stack is not
maintained sufficiently.
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Probable causes
INZ-TN1ZSS-E