Siemens LMV5 Series Technical Instructions page 238

Error Diag.
Device Display
Code Code
Code for VSD
Any #
Module Fault
Speed Acquisition
01
faulty
Wrong Direction
02
of Rotation
Speed Acquisition
03
faulty
Standardization
04 canceled
because of VSD
VSD
1F
Module
Standardization
canceled
05
because of Air
Actuator
Speed Test was
06 not successfully
completed
07 Safety loop open Standardization not possible when safety loop is open
Fault with devices or wiring connected to the Base Unit (LMV5)
21 Any # Safety Loop open
Devices
conn. to
Internal Temp
LMV5
22 Any # Limiter
has responded
Section 7
Meaning for the LMV5x System
Fault with VSD
Basic unit has detected a fault in connection with the VSD
module
Internal VSD module test was not successful
Fan rotates in the wrong direction
Pulse sequence and length at the speed input were different
from those anticipated
Fan was not able to keep the standardized speed at a constant
level
Air actuator (or other air influenced actuator) has not reached
the prepurge position.
For this reason, speed standardization is not possible
Internal VSD module speed test was not successful
Limit switches wired into the safety loop have opened (such as
low low water or high Limit)
Internal temperature limiter has switched off because the value
of parameter TL_Thresh_Off has been exceeded.
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Corrective Action
If fault occurs sporadically, reduce electrical noise.
If fault occurs continuously, replace LMV5.
1) Check to see if the motor's direction of rotation is
correct. Reverse if necessary
2) Check to see if the arrow on the speed wheel points
in the correct direction of rotation. Reverse if
necessary.
1) 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.
2) Check the wiring of the speed sensor. Ensure
reference ground is connected.
1) Check to see if all air-influencing actuators travel to
the prepurge position and remain in that position for the
VSD standardization.
2) Ensure torque requirements of air influencing
dampers / valves is less than actuator output.
3) Verify that no air influencing damper / valve is bound.
4) Check the two 12V fuses located under black covers
on the right side of the LMV5
5) Check the CANBus power supply (blue or black
transformer) terminal SEK2. Pin 1 and pin 4 should
have 12VAC to reference ground which is pin 2.
Voltage between pin 1 and pin 4 should be 24VAC.
Set parameter Settling Time to 16.
If fault occurs sporadically, reduce electrical noise.
If fault occurs continuously, replace LMV5.
Check all switches wired into the safety loop circuit.
This also includes the burner flange circuit.
Check all switches wired into the safety loop circuit.
This also includes the burner flange circuit.
Check the burner / boiler temperature sensor located on
terminal X60.
SCC Inc.