Siemens LMV5 Series Technical Instructions page 250

Error Diag.
Device Display
Code Code
See diagnostic codes for A1 error codes. These diagnostic codes are identical, except they apply to the Auxiliary 3 Actuator.
A0
Any #
01
02
Internal Fault Air
04
Actuator
05
07
08
09
Overtemperature
0C
Air Actuator
Internal Fault Air
0D
Actuator
Ramp time too
Air
A1
0E short
Actuator
Air Actuator
10
Internal Fault Air
11
Actuator
12
Position Fault Air
13
Actuator
15
Internal Fault Air
Actuator
16
Section 7
Meaning for the LMV5x System
Fault with Connected Actuators
Air actuator has detected own fault and reported it to the basic
unit. Type of fault: See diagnostic code
CRC fault during ROM test
CRC fault during RAM test
Fault during key value check
Error code for time block overflow
Sync fault or CRC fault
Error code for main loop counter
Fault during stack test
Temperature warning and shutdown
Actuator turns in the wrong direction
Actuator operates with too short a ramp time,
or with an angular rotation that is too long for the ramp time
Timeout during A/D conversion
Fault during ADC test
Fault during A/D conversion
Actuator is outside the valid angular
rotation (0-90°) or linearization data are faulty
CAN fault
CRC fault of a parameter page
Page 42
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Corrective Action
1) Check CANBus cabling. Ensure that all cable shields
(screens) which are located in the cable sheath are
terminated correctly at each actuator, O2 module, and
at the LMV5x...
2) Check each CANBus connector to ensure proper
termination (no conductors exposed on the back of the
plug)
3) If fault occurs sporadically: Reduce electrical noise.
4) If fault occurs constantly: Replace air actuator
Check the temperature of the air actuator. The max.
temperature 140 °F.
Verify that the air damper is not stuck. A stuck air
damper will cause the actuator to trip on overcurrent.
During this short trip the actuator can be momentarily
pushed backwards by torsional effects.
1) Match ramp time to the slowest connected actuator
(SQM48.4 - 30 sec, SQM48.6 - 60sec, SQM9 - 30 sec)
2) Check the CANBus power supply. Verify fuses FU2
and FU3 are ok. Verify CANBus is not overloaded (see
wiring section).
1) If fault occurs sporadically, reduce electrical noise.
2) If fault occurs constantly, replace air actuator.
Check to see if actuator is within the valid positioning
range (0-90°). When the actuator is not powered, it
could be moved out of the valid positioning range. Take
power off the actuator and position shaft back within the
valid positioning range.
1) Check CANBus cabling. Ensure that all cable shields
(screens) which are located in the cable sheath are
terminated correctly at each actuator, O2 module, and
at the LMV5x...
2) Check each CANBus connector to ensure proper
termination (no conductors exposed on the back of the
plug)
SCC Inc.