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Building Technologies Basic documentation LMV37.4... CC1P7546en
11 Actuators X53 / X54 17.12.2018
Example of actuator with counterclockwise rotation:
When referencing in the Close position, the actuator first travels a certain distance into
the working range (toward the Open position). Then, it travels to a position representing
maximum -7.7°, thereby crossing the reference mark for the first time. Then, the
actuator moves in the other direction again and detects the inner ramp of the reference
mark. This is the reference point used by all positions. If the reference point is
parameterized in the Open position, referencing takes place in a mirror-symmetrical
manner. In that case, the actuator first travels into the working range (toward the Open
position). Then, it crosses the reference mark and travels to a position representing
maximum 110.6°, then back to the inner ramp of the reference mark.
9
0
°
(
u
s
a
b
l
e
r
a
n
g
e
)
Close (0° 0.6°)
Reference range "Close”
Range stop "Close"
Reference range "Open"
M
o
d
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l
a
t
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n
r
a
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g
e
Range stop "Open"
1
8
.
5
°
2
0
.
6
°
5
.
6
°
7.7°
1
1
0
.
6
°
(
w
o
r
k
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r
a
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f
o
r
r
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f
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n
c
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g
“
O
p
e
n
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)
Figure 79: Angle definitions with SQM33
Error
code
Diagnostic
code
Meaning for the LMV37.4
85 0 Referencing error of fuel actuator
1 Referencing error of air actuator
Bit 7
Valency
≥128
Referencing error due to parameter change
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