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.
32 Quick shutdown due to excessive speed deviation
The speed of the motor was more than 10% different than the anticipated
speed for more than 1 second.
1) Check the ramp times of the VSD and LMV3. Increase if necessary. The
ramp times in the LMV3 should be at least 20% longer than the ramp times
in the VSD.
2) Check the setting of parameter 661.
64 VSD speed is below minimum speed (phase dependent)
1) Standby (phase 12): Ensure parameter 669:01 (maximum speed) is set
to a higher value than parameter 669:00 (minimum speed).
2) Standby (phase 12): Ensure parameter 663 (near zone) is set to a
higher value than parameter 662 (neutral zone).
3) Check the absolute speed (parameter 935) to ensure the correct speed
is being detected by the LMV3.
4) Prepurge (phase 30): The detected speed was below the minimum
prepurge speed (parameter 667), or the setting of parameter 503:01 or
506:01 is below the setting of parameter 667.
5) Operation (phases 40-64): The detected speed was below the minimum
operation speed (parameter 669:00), or a VSD curve point was set below
the setting of parameter 669:00.
128 VSD speed exceeds maximum speed (phase dependent)
1) Standby (phase 12): Ensure parameter 226/266/326/366 is set to a
higher value than parameter 665 (time outside near zone).
2) Standby (phase 12): Ensure parameter 669:01 (maximum speed) is set
to a higher value than parameter 669:00 (minimum speed).
3) Standby (phase 12): Ensure parameter 663 (near zone) is set to a
higher value than parameter 662 (neutral zone).
4) Check the absolute speed (parameter 935) to ensure the correct speed
is being detected by the LMV3.
5) Ignition (phase 38): The detected speed was above the maximum
ignition speed (parameter 668), or the VSD speed setting of P0 is above the
setting of parameter 668.
6) Operation (phases 40-64): The detected speed was above the
maximum operation speed (parameter 669:01), or a VSD curve point was
set above the setting of parameter 669:01.
255 Failed forced travel test
If the LMV3 remains at the same fire rate for an extended period of time, a
minimal load change is forced, and the corresponding feedback from the
PWM blower is checked. If this fault occurs, the PWM blower speed
change was insufficient in response to the load change.
83
Section 6 Page 13 SCC Inc.
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