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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
1 Control range limitation at the bottom
VSD speed was too high
2 Control range limitation at the top
VSD speed was too low
81
1 Interrupt limitation speed input
Too much electromagnetic interference on the sensor line
improve EMC
82 # Error during VSD’s speed standardization
1 Timeout of standardization (VSD ramp down time too long)
Timeout at the end of standardization during ramp down of the VSD
Ramp time settings of the VSD are not shorter than those of the LMV37.4 (parameter: 523)
2 Storage of standardized speed not successful
Error during storage of the standardized speed
lock the LMV37.4, then reset it and repeat the standardization
3 Line interruption speed sensor
LMV37.4 receives no pulses from the speed sensor:
1. Motor does not turn.
2. Speed sensor is not connected.
3. Speed sensor is not activated by the sensor disk (check distance)
4
Speed variation / VSD ramp up time too long / speed below
minimum limit for standardization
Motor has not reached a stable speed after ramp up.
1. Ramp time settings of the VSD are not shorter than those of the LMV37.4 (parameters 522,
523).
2. 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).
3. VSD does not follow quickly enough the changes of the LMV37.4. Check settings of the VSD
(input filter, slippage compensation, hiding different speeds)
4. Speed of VSD lies below the minimum for standardization (650 1/min)
5 Wrong direction of rotation
Motor’s direction of rotation is wrong.
1. Motor turns indeed in the wrong direction
change parameterization of the direction of rotation or interchange 2 live conductors.
2. Sensor disk is fitted the wrong way
turn the sensor disk.
6 Unplausible sensor signals
The required pulse pattern (60°, 120°, 180°) has not been correctly identified.
1. Speed sensor does not detect all tappets of the sensor disk
check distance
2. As the motor turns, other metal parts are detected also, in addition to the tappets
improve mounting.
3. Electromagnetic interference on the sensor lines
check cable routing, improve EMC
4. Checking the settings for parameters 643 (symmetry) and 644 (number of pulses per
revolution)
7 Invalid standardized speed
The standardized speed measured does not lie in the permissible range.
Motor turns too slowly or too fast.
15 Speed deviation µC1 + µC2
The speeds of microcomputer 1 and 2 deviated too much. This can be caused by wrong
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