Siemens LMV3 series Technical Instructions page 141

Error Diag.
Code Code
Note: Diagnostic codes are additive. If a diagnostic code appears that is not on this list, it is a combination of multiple diagnostic codes.
Any # Gas pressure switch-min (Pmin) / heavy oil direct start
0 No minimum gas pressure
23
1 Gas shortage - start prevention
2 Heavy oil direct start
50 Any # Internal error
51 Any # Internal error
55 Any # Internal error
56 Any # Internal error
57 Any # Internal error
58 Any # Internal error
Any # Internal error: No valid load controller source
0 Internal error: No valid load controller source
60
1 Analog output preset valid - prevention of startup
2 Analog output preset valid - default output low-fire
Section 6
Meaning for the LMV3 System
A low gas pressure or heavy oil direct start fault occurred. See diagnostic
codes for more information.
The low gas pressure switch (input X5-01.2) opened, causing a fault. Check
gas supply and open any manual shutoff valves. Check the setpoint and
wiring of the low gas pressure switch. Check the setting of parameter
285/385.
The low gas pressure switch was not made by the end of phase 38,
preventing the startup of the LMV3. See diagnostic code 0 for more
corrective actions.
When firing heavy oil, the heavy oil direct start input (X9-04.2) was de-
energized, causing the fault. Check the setting of parameter 286, and
verify the wiring of the heavy oil direct start is correct.
If the fault occurs continuously, replace the LMV3.
No valid 4-20 mA signal is present on terminal X64. This could be done on
purpose to create a low fire hold. Otherwise, check wiring of 4-20 mA
signal and ensure 4-20 mA source is valid. See diagnostic codes for more
information.
Reset the fault. If the fault occurs continuously, replace the LMV3.
No valid 4-20 mA signal is present on terminal X64 and parameter 204 is
set to 1, causing the lockout. Re-establish a valid 4-20 mA signal and reset
the fault.
No fault: No valid 4-20 mA signal is present on terminal X64 and
parameter 204 is set to 0, so the LMV3 is operating at low fire. The fault
message appears to alert the user that a low fire hold is enabled. To
enable modulation, re-establish a valid 4-20 mA signal.
Page 7
Corrective Action
SCC Inc.