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Building Technologies Basic documentation LMV37.4... CC1P7546en
20 Lifecycle function 17.12.2018
19.2 Makeup of error history
Parameter Index Description
701 Current error state, can also be error-free
.01 Error code (200 = error-free) refer to Error code list
.02 Diagnostic code refer to Error code list
.03 Error class error classes
.04 Phase: Phase in which error occurred sequence diagrams
.05 Startup counter: (parameter 166) at which the error occurred
.06 Output: Burner output at which the error occurred
702 .01..06 Latest error in the history
●
●
●
725 .01..06 Oldest error in the history
No. Parameter
166 Total number of startups
Both the service menu and the parameter setting menu show the error history.
The display on the service menu can be deleted in a way that the only errors shown are
those that occurred after the deletion.
The error history on the parameter setting menu cannot be deleted.
For the deletion, parameter 130 must be set to 1 and then to 2 within 6 seconds.
When the parameter returns to 0, the deletion process is completed.
No. Parameter
130
Delete display of error history
To delete the display: Set parameter to 1, then to 2
Return value 0: Job successfully completed
Return value -1: Timeout of 1_2 sequence
20 Lifecycle function
If the startup counter exceeds a defined threshold, a display error code is set and
displayed. The error can be acknowledged.
The display code is always set in standby (when there is no heat request).
Hence, the moment the threshold is exceeded, the user is notified that the end of the
lifecycle of the LMV37.4 will soon be reached.
Error
code
Diagnostic
code
Meaning for the LMV37.4
116 0 Designed lifecycle exceeded (250,000 startups)
Note
The LMV37.4 should be replaced when this message appears.
Deleting the error history
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