Control Sequence In The Event Of Fault - Siemens LME SERIES Installation Manuals

Functions (cont´d)
Control sequence in the
event of fault
Cause
Mains failure
Voltage below undervoltage threshold
Voltage above undervoltage threshold
Extraneous light during «t1»
Extraneous light during «tw»
No flame at the end of «TSA»
Loss of flame during operation
«LP» is welded in working position
LME41...:
None reaction
«LP» is welded in no-load position
LME41...:
«LP» is welded in no-load position
(jumper) between terminal 3 and terminal 11
No air pressure signal after completion «t10»
LME41...:
No air pressure signal after completion «t10»
breakdown of jumper terminal 3 / terminal 11
«CPI» contact is open during «tw»
Resetting the burner
control
Limitation of repetitions
(only LME11...,
LME41.051...)
Building Technologies
HVAC Products
If lockout occurs, the outputs for the fuel valves, the burner motor and the ignition
equipment will immediately be deactivated (< 1 second).
Response
Restart
Safety shutdown
Restart
Lockout
Prevention of startup, lockout after 30 seconds at the latest
LME41.051..., LME41.054..., LME41.092...:
Prevention of startup
LME11...,
Max. 3 repetitions, followed by lockout at the end of «TSA»
LME2..., LME41.052..., LME41.053..., LME41.054...,
LME41.071..., LME41.09...:
Lockout at the end of «TSA»
LME11..., LME41.051...:
•
•
LME2...:
Lockout
LME41.052..., LME41.053..., LME41.054..., LME41.071...,
LME41.09...:
Repetition
Prevention of startup, lockout after 65 seconds at the latest
Lockout max 65 s after completion of «t10»
or no connection
Lockout
LME41...:
or Safety shutdown / restart
Prevention of startup, lockout after 60 seconds at the latest
In the event of lockout, the LME... remains locked and the red signal lamp (LED) will light
up. The burner control can immediately be reset. This state is also maintained in the case
of mains failure.
When lockout occurs, the burner control can immediately be reset. To do this, press the
lockout reset button for about 1 second (< 3 seconds). The LME... can only be reset
when all contacts in the line are closed and when there is no undervoltage.
If no flame is established at the end of «TSA», or if the flame is lost during operation, a
maximum of 3 repetitions per controlled startup can be performed via «R», or else
lockout will be initiated. Counting of repetitions is restarted each time a controlled star-
tup via «R» takes place.
LME41.051...:
Establishment of flame at the end of «TSA» → Max. 3 repeti-
tions
No establishment of flame at the end of «TSA» → Lockout
13/25
CC1N7101en
27.11.2008