Siemens LMV37.400A2 - Special Functions During Program Sequence; Reset and Manual Lockout

50/213
Building Technologies Basic documentation LMV37.4... CC1P7546en
HVAC Products 6 Basic unit 01.12.2009
6.5.3 Special functions during the program sequence
6.5.3.1. Reset / manual lockout
The system can be manually locked by simultaneously pressing the InFo button and
any other button on the AZL2... This function enables the operator to lock the system
from any of the operating levels or, in other words, to trigger non-volatile lockout. Due to
the system’s structure, this does not represent an emergency off function.
When making a reset, the following actions are carried out:
• The alarm relay and the fault display are switched off
• The lockout position is canceled
• The unit makes a reset and then changes to standby
There are 3 choices to reset the system.
1. Resetting on the AZL2… display and operating unit
If the unit is in the lockout position, a reset can be made by pressing the InFo button for
1…3 seconds. The function is available only when the unit is in the lockout position.
Longer or shorter pushes on the button do not produce a reset so that the system main-
tains the lockout position.
Error
code
Diagnostic
code
Meaning for the LMV37.4... system
167 2 Manual lockout by AZL2…
2. Resetting by pressing the button at the «Reset» connection terminal on the
LMV37.4... basic unit (X8-04, terminal 1)
If the unit is in the lockout position, a reset can be made by pressing the button for 1…3
seconds. Longer or shorter pushes on the button are ignored so that the system main-
tains the lockout position.
If the unit is not in the lockout position and the reset button is pressed for 1…6 seconds,
a change to the lockout position takes place.
If this response is not desirable, it is possible to tap the supply for the reset button from the
alarm output, thus achieving the same response as described above under 1.
Error
code
Diagnostic
code
Meaning for the LMV37.4... system
167 1 Manual lockout by contact
Without manual lockout With manual lockout
Bild 391/1009
X8-04
Reset
2
LMV...
X3-05
Alarm
LMV...
X8-04
Bild 392/100 9
Reset