Siemens LMV36.520A1 Basic Documentation page 236

Error
Diagnostic code
code
7
15
20
21
22
23
24
25
128
255
83 #
Bit 0
Valency 1
Bit 1
Valency 2...3
Bit 2
Valency 4...7
Bit 3

Valency 8
236/248
Building Technologies Division
Infrastructure & Citiies Sector
Meaning for the LMV36... system
Invalid standardized speed
Speed deviation µC1 + µC2
Wrong phase of phase manager
Safety loop / burner flange open
Air actuator not referenced
VSD deactivated
No valid operation mode
Pneumatic air-fuel ratio control
Running command with no preceding standardization
No standardized speed available
Speed error VSD
Lower control range limitation of control
Upper control range limitation of control
Interruption via disturbance pulses
Curve too steep in terms of ramp speed
Basic documentation LMV36...
30 Error code list
Remedy
 check distance
2. As the motor turns, other metal parts are detected also, in addition to the tappets  improve
mounting.
3. Electromagnetic interference on the sensor lines
 check cable routing, improve EMC
The standardized speed measured does not lie in the permissible range.
 Motor turns too slowly or too fast.
The speeds of microcomputer 1 and 2 deviated too much. This can be caused by wrong
standardized speeds (e.g. after restoring a data set to a new unit) → repeat standardization and
check the fuel-air ratio
Standardization was made in a wrong phase. Permitted are only phases  12  controller OFF,
start standardization again
Safety loop or burner flange is open  repeat standardization with safety loop closed
Air actuator has not been referenced or has lost its referencing.
1. Check if the reference position can be approached.
2. Check if actuators have been mixed up.
3. If error only occurs after the start of standardization, the actuator might be overloaded and
cannot reach its destination.
Standardization was started with VSD deactivated
 activate the VSD and repeat standardization
Standardization was started without valid operation mode
 activate valid operation mode and repeat standardization
Standardization was started with pneumatic air-fuel ratio control
 standardization with pneumatic air-fuel ratio control not possible
VSD is controlled but not standardized
 make standardization
Motor turns but is not standardized
 make standardization
Required speed has not been reached
Speed has not been reached because control range limitation has become active
 for measures, refer to error code 80
Speed has not been reached because control range limitation has become active
 for measures, refer to error code 80
Speed has not been reached due to too much electromagnetic interference on the sensor line
 for measures, refer to error code 81
Check speed differential between the curvepoints and the modulating operating ramp setting
(parameter 544).
1. Modulating operating ramp 32 seconds
CC1P7544en
25.09.2013