Meaning for the LMV3 System Corrective Action
no
Comm
- No communication between the LMV3 and the AZL23
Check for a loose connection between the LMV3 and AZL23. If the
connection is good, replace the cable connecting the LMV3 to the AZL23.
If that does not fix the issue, replace the AZL23.
Any # No flame at the end of safety time (TSA)
1 No flame at the end of safety time 1 (TSA1)
2 No flame at the end of safety time 2 (TSA2)
4 No flame at the end of safety time 1 (TSA1) (software version ≤ V02.00)
Any # Air pressure failure
A fault occurred related to the air pressure switch input X3-02.1. See
diagnostic codes for more information.
0 Air pressure off
The air pressure switch input was de-energized when it should have been
energized. Make sure the blower starts in phase 22 and the switch
setpoint is set appropriately.
1 Air pressure on
The air pressure switch input was energized when it should have been de-
energized. Make sure the blower turns off in phase 78 and the switch
setpoint is set appropriately. If necessary, increase the setting of
parameter 213.
2 Evaluation of air pressure
Check the setting of parameter 235/335. This can only be set to 2 on
pneumatic fuel train options.
4 Air pressure on - prevention of startup
20 Air pressure, combustion pressure - start prevention
68 Air pressure, POC - start prevention
84 Air pressure, combustion pressure, POC - start prevention
Note: Diagnostic codes are additive. If a diagnostic code appears that is not on this list, it is a combination of multiple diagnostic codes.
3
The air pressure switch input is energized, preventing the LMV3 from
starting up. If other inputs besides the air pressure switch input are in the
wrong state, causing a start prevention, the diagnostic code calls out what
other inputs are in the wrong state.
2
A flame failure occurred during lightoff.
1. Check the wiring of the ignition transformer, pilot valve, and main
valve(s).
2. Check manual shutoff valves for the pilot gas and main gas.
3. Check the position of the air damper and close it further if necessary.
The pilot flame might be getting blown out.
4. Check the flame detector signal in the presence of a known flame
source. Replace the flame detector if it does not produce the anticipated
signal.
Section 6 Page 2 SCC Inc.
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