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Building Technologies
Basic Documentation LMV5...
CC1P7550en
19 O2 trim control with LMV52 and PLL52
22.05.2018
19.7.3 Service timer for QGO20
A service timer has been implemented for the QGO20.
The time on the service timer is compared against the time that the system has been in
operation (
TotalHours
hours run counter).
The following occurs if the set time has elapsed:
∂
In
the
conAutoDeac
operating mode, O2 trim control is deactivated automatically;
however the O2 alarm remains active
∂
In
the
O2 Alarm
and
O2 Control
operating modes, lockout is initiated
∂
The following displays appear in the display of the AZL52:
O
2
S
e
n
s
o
r
S
e
r
v
i
c
e
i
n
t
e
r
v
a
l
e
x
p
i
r
e
d
The service work to be performed is described in the QGO20 Basic Documentation
(P7842), refer to chapter
Service note
.
Using the
O2SensServTimRes
parameter, the timer can be reset once the service work
has been completed:
If the O2 trim control is set to
auto deact
, it is reactivated by setting it to
conAutoDeac
.
The service interval can be set via the
O2SensServTim
parameter.
If the service interval is set to
0
, the function is deactivated!
Parameter O2SensServTim
O2SensServTimRes
