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Electrical connection of the FCU
Relay 1
Relay 2
6
7
8
6
7
8
13
14
15
13
14
15
Within range Lower limit ≤
measured
value ≤
upper limit
After
switching the
unit on or
starting a
measurement
or
Measured
value < lower
limit or
Measured
value > upper
limit
Lower limit ≤
measured
value ≤ upper
limit
After
switching the
unit on or
starting a
measurement
or
Measured
value < lower
limit or
Measured
value > upper
limit
Outside range Measured
value ≤ lower
limit or
Measured
value ≥
upper limit
After
switching the
unit on or
starting a
measurement
or
Lower limit <
measured
value < upper
limit
Measured
value ≤ lower
limit or
Measured
value ≥ upper
limit
After
switching the
unit on or
starting a
measurement
or
Lower limit <
measured
value < upper
limit
No function
Always off
Always off
M3
Measuremen
t is currently
in progress
and one or
more of the
last 5
measured
values > limit
5 consecutive
measured
values ≤ limit
or
measurement
stopped
After the first
measured
value is
available:
Flow error
Flow rate
within set
range
FCU 8111 /-Aviation
en(us)
/
BEWA FCU8111 3690427a en-us 2017-01-23.doc
2017-01-23