Siemens LMV37.4 Series Basic Documentation page 129

Value Error
-1 Timeout of standardization (VSD's ramp
down time too long)
-2 Storage of standardized speed not
successful
-3
Line interruption
-4 Speed variation / VSD ramp up time too long
/ speed below minimum limit for
standardization
-5 Wrong direction of rotation
-6 Unplausible sensor signals
-7 Invalid standardized speed
-15 Speed deviation µC1 + µC2
-20 Wrong phase of phase manager
-21 Safety loop / burner flange open
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6. Close the standardization
When standardization is successfully completed, reset parameter 641 to 0.
If standardization was not successful, parameter 641 assumes a negative value.
The value provides information on the cause of fault:
speed sensor
Basic documentation LMV37.4...
12 Fan control
Remedy
Timeout at the end of standardization during ramp
down of VSD.
1. VSD ramp time settings are not shorter than those
of the basic unit (parameter 523).
Error during storage of standardized speed  lock
the basic unit and reset it again, repeat
standardization
Basic unit receives no pulses from the speed sensor.
1. Motor does not run.
2. Speed sensor is not connected.
3. Speed sensor is not actuated by the sensor disk
(check distance).
Motor has not reached a stable speed after ramp up.
1. VSD ramp time settings are not shorter than those
of the basic unit (parameters 522, 523).
2. VSD's characteristic is not linear. Configuration of
voltage input at the VSD must accord with that of
the basic unit (DC 0...10 V).
3. VSD does not follow quickly enough the change of
the basic unit. Check VSD settings (input filter,
slippage compensation, hiding various speeds).
4. Speed of VSD lies below the minimum for
standardization (650 rpm).
Motor's direction of rotation is wrong.
1. Motor turns in the wrong direction  change
parameterization of the direction of rotation or inter
change 2 live conductors.
2. Sensor disk is fitted the wrong way  turn sensor
disk.
The required pulse pattern (60°, 120°, 180°) has not
been correctly identified.
1. Speed sensor does not detect all tappets of the
sensor disk  check the 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.
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
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CC1P7546en
20.09.2013