Control Of Fan Motor With Pneumatic Fuel-Air Ratio Control - Siemens LMV36.520A1 Basic Documentation

Value Error
-22 Air actuator not referenced
-23 VSD deactivated
-24 No valid operation mode
-25 Pneumatic air-fuel ratio control
Running command with no preceding
-128
standardization
-255 No standardized speed available
140/248
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The result of speed standardization (100% speed) can be read out via parameter. The
speeds acquired by the 2 microcontrollers can differ by about 1.5%, the reason being
slightly different resonator frequencies.
No. Parameter
642.0 Standardized speed
Index 0 = speed 1
642.1 Standardized speed
Index 1= speed 2 (internal monitoring)
13.12 Control of fan motor with pneumatic fuel-air
ratio control
If control of the fan motor is employed for burners with pneumatic air-fuel ratio control,
only the control path is used. There is no need to connect a speed feedback signal and
to have speed control (for operating modes, refer to chapter Selection of operating
mode).
Basic documentation LMV36...
13 Fan control
Remedy
Air actuator is not referenced or has lost its reference.
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 is
not possible
VSD is controlled but not standardized
 make standardization
Motor turns but is not standardized
 make standardization
CC1P7544en
25.09.2013