Device Display Meaning for the LMV5x System Corrective Action
A0
Any #
Air actuator has detected own fault and reported it to the basic
unit. Type of fault: See diagnostic code
01 CRC fault during ROM test
02 CRC fault during RAM test
04 Fault during key value check
05 Error code for time block overflow
07 Sync fault or CRC fault
08 Error code for main loop counter
09 Fault during stack test
0C
Overtemperature
Air Actuator
Temperature warning and shutdown
Check the temperature of the air actuator. The max.
temperature 140 °F.
0D
Internal Fault Air
Actuator
Actuator turns in the wrong direction
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.
0E
Ramp time too
short
Air Actuator
Actuator operates with too short a ramp time,
or with an angular rotation that is too long for the ramp time
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).
10 Timeout during A/D conversion
11 Fault during ADC test
12 Fault during A/D conversion
13
Position Fault Air
Actuator
Actuator is outside the valid angular
rotation (0-90°) or linearization data are faulty
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.
15 CAN fault
16 CRC fault of a parameter page
Fault with Connected Actuators
Air
Actuator
Internal Fault Air
Actuator
A1
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
See diagnostic codes for A1 error codes. These diagnostic codes are identical, except they apply to the Auxiliary 3 Actuator.
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)
1) If fault occurs sporadically, reduce electrical noise.
2) If fault occurs constantly, replace air actuator.
Internal Fault Air
Actuator
Internal Fault Air
Actuator
Section 7 Page 42 SCC Inc.
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