Siemens LMV37.4 Series Basic Documentation page 242

Error
Diagnostic code
code
67 #
70 #
23
26
71 #
0
1
2
3
72 #
73 #
23
26
75 #
1
2
4
6
16
76 #
80 #
242/267
Building Technologies
Meaning for the LMV37.4
Internal error
Internal error fuel-air ratio control: Position calculation
modulating
Output invalid
Curvepoints undefined
Special position undefined
Home position
Prepurge position
Postpurge position
Ignition position
Internal error fuel-air ratio control
Internal error fuel-air ratio control: Position calculation
multistep
Output invalid
Curvepoints undefined
Internal error fuel-air ratio control: Data clocking check
Current output different
Target output different
Target positions different
Target output and target position different
Different positions reached
Internal error fuel-air control
Control range limitation of VSD
Basic documentation LMV37.4...
29 Error code list (all LMV2 types / LMV3 types)
Recommended measures or causes
Make a reset; if error occurs repeatedly, replace the LMV37.4
No valid output
Adjust the curvepoints for all actuators
Parameterize the home position for all actuators used
Parameterize the prepurge position for all actuators used
Parameterize the postpurge position for all actuators used
Parameterize the ignition position for all actuators used
Make a reset; if error occurs repeatedly, replace the LMV37.4
No valid output
Adjust the curvepoints for all actuators
Check the external load controller, including the connection.
Parameters 123.1 and 123.2 must be identical (example: set to 1).
Check the external load controller, including the connection.
Parameters 123.1 and 123.2 must be identical (example: set to 1).
Check the external load controller, including the connection.
Parameters 123.1 and 123.2 must be identical (example: set to 1).
Check the external load controller, including the connection.
Parameters 123.1 and 123.2 must be identical (example: set to 1).
Can be caused by different standardized speeds (e.g. after restore of data set) when the VSD is
activated  standardize again and check adjustment of the fuel-air ratio control system
Make a reset; if error occurs repeatedly, replace the LMV37.4
LMV37.4 could not correct the difference in speed and reached a control range limit.
1. LMV37.4 is not standardized for this motor  repeat standardization.
Caution!
Settings of fuel-air ratio control must be checked!
2. Ramp time settings of the VSD are not shorter than those of the LMV37.4 (parameters 522,
523) or the setting for the modulating operating ramp is incorrect (parameter 544)
3. Characteristic of the VSD is not linear. Configuration of the voltage input at the VSD must
accord with that of the LMV37.4 (parameter 645).
4. VSD does not follow quickly enough the changes of the LMV37.4. Check settings of the VSD
(input filter, slippage compensation, hiding different speeds)
CC1P7546en
17.12.2018