Siemens LMV3 series Technical Instructions page 146

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.
20 Wrong phase of phase manager
21 Safety loop / burner flange open
22 Air actuator not referenced
23 VSD deactivated
82
24 No valid operation mode
25 Pneumatic air-fuel ratio control
128 Running command with no preceding standardization
255 No standardized speed available
Any # Speed error VSD
1 Lower control range limitation of control
2 Upper control range limitation of control
4 Interruption via disturbance pulses
8 Curve too steep in terms of ramp speed
83
16 Interruption of speed signal
Section 6
Meaning for the LMV3 System
Standardization must be performed in standby (phase 12).
Fix any conditions causing a limit in the safety loop / burner flange circuit
to be open, then attempt to standardize again.
Typically caused by trying to standardize while the air actuator is currently
referencing. Wait for the actuator to finish referencing and try to
standardize again. If the fault persists, see error code 85, diagnostic code
1 for additional troubleshooting.
The VSD must be activated before standardization can be performed. Set
parameter 542 to a 1 and attempt to standardize again.
A fuel train must be selected before standardization can be performed.
Select a fuel train via parameter 201 (fuel 0) or 301 (fuel 1), then attempt
to standardize again.
Standardization cannot be performed when using a pneumatic fuel train.
Select a different fuel train via parameter 201 (fuel 0) or 301 (fuel 1), then
attempt to standardize again.
A call for heat was received and the VSD is activated (parameter 542 = 1),
but no standardization has been performed. Perform a standardization by
setting parameter 641 to a 1 while in standby phase 12, or deactivate the
VSD by setting parameter 542 to 0.
Perform a standardization by setting parameter 641 to 1 while in standby
(phase 12).
A VSD speed error occurred. See diagnostics codes for more information.
See error code 80, diagnostic code 1.
See error code 80, diagnostic code 2.
See error code 81, diagnostic code 1.
See error code 84.
No speed signal was detected.
1) Ensure that the motor is rotating. If it is not, check the wiring of the
VSD / PWM blower.
2) If using a VSD, turn the motor by hand to ensure that the LED on the
speed sensor lights up when it sees the speed wheel. If it does not,
decrease gap between speed wheel and speed sensor and check the wiring
of the speed sensor. If there are no issues, replace speed sensor.
Page 12
Corrective Action
SCC Inc.