Siemens LMV37.4 Series Basic Documentation page 130

Value Error
-22 Air actuator not referenced
-23 VSD deactivated
-24 No valid operating mode
-25 Pneumatic air-fuel ratio control
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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.
Nr. Parameter
642.0 Standardized speed of μC1
642.1 Standardized speed of μC2
Basic documentation LMV37.4...
12 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 standardization was
started, the actuator is possibly overloaded and
cannot reach the required position.
Standardization was started with VSD deactivated
 activate VSD and repeat standardization
Standardization was started with no valid operating
mode
→ select a valid operating mode and repeat
standardization
Standardization was started with pneumatic air-fuel ratio
control
→ standardization with pneumatic air-fuel ratio control is
not possible
CC1P7546en
20.09.2013