35
Basic Function Details Section 2-4
When the life of the electrolytic capacitor (expected value = 10 yr) has halved,
the remaining life span (5 yr) is divided into 10 levels (in 0.5-yr increments).
These levels are used by the maintenance forecast monitor output (LFE) to
display the number of years that are left before the Power Supply needs to be
replaced.
Note The expected life span of the S8AS is 10 years, but it will change
depending on the amount of time it is in operation and the ambient
temperature.
2-4-4 Over-temperature Output
When the temperature exceeds the set value continuously for more than 1 s,
the seven-segment display will show error code A30 and the Over-tempera-
ture Output (TMP) will go OFF.
The error display and Over-temperature Output are reset automatically when
the temperature has been below the set value minus 3°C for more than 5 s.
Over-temperature Output
(TMP)
When the temperature falls below the set value minus 3°C, the over-tempera-
ture output automatically turns ON.
• The over-temperature output (TMP) can be used to start an exhaust fan
or air conditioner to reduce the temperature in the control panel.
• The initial value is set at 90°C so that the over-temperature output is
essentially disabled at the beginning.
Example Application The output is normally closed (ON) and goes OFF when there is an error, so
receive the TMP output through an auxiliary relay. In addition, the output will
go ON momentarily when the power is turned ON, so receive the output
through a time-delay relay. (For details, refer to page 50.)
Setting
range
Default
value
Operation Seven-
segment
display
Outputs Conditions
required to
reset
25 to 90°C90°C The output is
turned OFF
when the tem-
perature higher
than the set
value continu-
ously for more
than 1 s.
Alternately
displays
error code
A30 and the
tempera-
ture(°C).
The Over-
temperature
Output
(TMP) pho-
toswitch out-
put turns
OFF.
Reset auto-
matically
when the
temperature
falls below
the set value
minus 3°C.
t: Over-temperature output threshold
(t-3)°C
Temperature °C
Error display and
Over-temperature
Output (TMP)
Automatic reset
1 s
5 s
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