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Building Technologies Basic documentation LMV37.4... CC1P7546en
HVAC Products 6 Basic unit 01.12.2009
6.5.3.3. Possible start preventions
Within the normal display, error code 201 is translated to text display OFF UPr (UPr =
unprogrammiert = not programmed); the numerical value appears in the error history.
Error
code
Diagnostic
code
Meaning for the LMV37.4... system
201
OFF UPr
1 No operating mode selected
2…3 No fuel train defined
4…7 No curve defined
8…15 Standardized speed undefined
16…31 Backup / restore was not possible
Other start preventions:
3 4
Air pressure on – start prevention
4 2
Extraneous light during startup – start prevention
14 64 POC open – prevention of startup
21 64
POC open – prevention of startup (software version
≤V02.00)
22
OFF S
0
Safety loop / burner flange open
83 #
Speed error VSD
97 #
Error relay supervision
0
Safety relay contacts have welded or external power supply
fed to safety relay
No. Parameter
642
Standardized speed
Index 0 = speed 1
Index 1 = speed 2 (internal supervision)
935 Absolute speed
936 Standardized speed
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