Device Display Meaning for the LMV5x System Corrective Action
Any #
Code for VSD
Module Fault
Basic unit has detected a fault in connection with the VSD
module
01
Internal VSD module test was not successful
02
Wrong Direction
of Rotation
Fan rotates in the wrong direction
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
03
Pulse sequence and length at the speed input were different
04
Standardization
canceled
because of VSD
Fan was not able to keep the standardized speed at a constant
level
05
Standardization
canceled
because of Air
Actuator
Air actuator (or other air influenced actuator) has not reached
the prepurge position.
For this reason, speed standardization is not possible
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.
06
Speed Test was
not successfully
Internal VSD module speed test was not successful
Set parameter
to 16.
If fault occurs sporadically, reduce electrical noise.
If fault occurs continuously, replace LMV5.
07 Safety loop open Standardization not possible when safety loop is open
Check all switches wired into the safety loop circuit.
This also includes the burner flange circuit.
21 Any # Safety Loop open
Limit switches wired into the safety loop have opened (such as
low low water or high Limit)
Check all switches wired into the safety loop circuit.
This also includes the burner flange circuit.
22 Any #
Internal Temp
Limiter
Internal temperature limiter has switched off because the value
of parameter TL_Thresh_Off has been exceeded.
Check the burner / boiler temperature sensor located on
terminal X60.
If fault occurs sporadically, reduce electrical noise.
If fault occurs continuously, replace LMV5.
VSD
Module
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.
1F
Fault with VSD
Devices
conn. to
LMV5
Fault with devices or wiring connected to the Base Unit (LMV5)
Section 7 Page 30 SCC Inc.
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