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Building Technologies Basic documentation LMV37.4... CC1P7546en
29 Error code list (all LMV2 types / LMV3 types) 17.12.2018
Error
code
Diagnostic code Meaning for the LMV37.4 Recommended measures or causes
67 # Internal error Make a reset; if error occurs repeatedly, replace the LMV37.4
70 #
Internal error fuel-air ratio control: Position calculation
modulating
23 Output invalid
No valid output
26 Curvepoints undefined
Adjust the curvepoints for all actuators
71 # Special position undefined
0 Home position
Parameterize the home position for all actuators used
1 Prepurge position
Parameterize the prepurge position for all actuators used
2 Postpurge position
Parameterize the postpurge position for all actuators used
3 Ignition position
Parameterize the ignition position for all actuators used
72 # Internal error fuel-air ratio control Make a reset; if error occurs repeatedly, replace the LMV37.4
73 #
Internal error fuel-air ratio control: Position calculation
multistep
23 Output invalid
No valid output
26 Curvepoints undefined
Adjust the curvepoints for all actuators
75 # Internal error fuel-air ratio control: Data clocking check
1 Current output different
Check the external load controller, including the connection.
Parameters 123.1 and 123.2 must be identical (example: set to 1).
2 Target output different
Check the external load controller, including the connection.
Parameters 123.1 and 123.2 must be identical (example: set to 1).
4 Target positions different
Check the external load controller, including the connection.
Parameters 123.1 and 123.2 must be identical (example: set to 1).
6 Target output and target position different
Check the external load controller, including the connection.
Parameters 123.1 and 123.2 must be identical (example: set to 1).
16 Different positions reached
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
76 # Internal error fuel-air control Make a reset; if error occurs repeatedly, replace the LMV37.4
80 # Control range limitation of VSD
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)
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