Siemens LMV3 series - Page 145

Error
Code
Diag.
Code
Meaning for the LMV3 System Corrective Action
Note: Diagnostic codes are additive. If a diagnostic code appears that is not on this list, it is a combination of multiple diagnostic codes.
3 Line interruption speed sensor
No pulses from the speed sensor were detected during standardization.
1) Verify that the motor is rotating.
2) Check the wiring between the speed sensor and the LMV3.
3) Check and / or adjust the gap between the speed wheel and the sensor.
The gap should be about 1/16" (2mm), or about two turns away from the
speed wheel.
4
Speed variation / VSD ramp up time too long / speed below minimum limit
for standardization
A stable speed was not reached after ramping up the VSD, so a
standardized speed could not be determined.
1) Either decrease the ramp up time in the VSD or increase the setting of
parameter 522.
2) Check for filters, damping, or delays on the input signal to the VSD. The
VSD should respond to the input signal in a linear fashion.
3) Ensure that the VSD and LMV3 are configured for the same analog
signal (0-10 VDC).
5 Wrong direction of rotation
1) Check to see if the motor's direction of rotation is correct. Reverse if
necesssary.
2) Check to see if the arrow on the speed wheel points in the correct
direction of rotation. Reverse if necessary.
6 Unplausible sensor signals
1) Check the setting of parameter 643 and ensure it is set correctly. For
VSD + 3-phase motor, this should be a 0. For most brushless DC blowers,
this should be a 1.
2) Check and / or adjust the gap between the speed wheel and the sensor.
The gap should be about 1/16" (2mm), or about two turns away from the
speed wheel.
3) Check the wiring of the speed sensor. Ensure the reference ground is
properly connected.
4) Ensure that other metal parts besides the speed wheel are not being
picked up by the sensor when the motor rotates.
7 Invalid standardized speed
The standardized speed measured does not lie in the permissible range
(650-14,000 RPM).
15 Speed deviation µC1 + µC2 Reset the fault and repeat the standardization.
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Section 6 Page 11 SCC Inc.