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Siemens Building Technologies
Basic Documentation LMV5...
CC1P7550en
HVAC Products
16 Addendum 1: List of fault status messages of LMV5... system
13.08.2004
Error
code
Diagnostic
code
Device
Display
Meaning for the LMV5x system
Troubleshooting
1D
10
BU
Fault Running Time VSD
Running time fault of VSD
1D
20
BU
Fault Running Time Aux Actuator
Running time fault of auxiliary actuator 3
1E
#
SA
VSD module
Special Pos not reached
Basic unit has detected that 1 / several ac-
tuators (incl. VSD module) has / have not
reached the special position pertaining to
the Phase
Check the relevant actuators to see if they are mechanically
overloaded
1E
01..3F
SA
Special Pos not reached
The diagnostic value is made up of the fol-
lowing faults or their combinations (the in-
dividual diagnostic codes are added up in
hexadecimal format)
Check characteristics of VSD for linearity. Remove filters,
damping and delay members.
1E
01
SA
Special Pos not reached
Positioning fault of air actuator
1E
02
SA
Special Pos not reached
Positioning fault of fuel actuator
1E
04
SA
Special Pos not reached
Positioning fault of auxiliary actuator 1
1E
08
SA
Special Pos not reached
Positioning fault of auxiliary actuator 2
1E 10
VSD
module Special Pos not reached
VSD has not reached the speed
1E
20
SA
Special Pos not reached
Positioning fault of auxiliary actuator 3
1F
#
VSD module Code for VSD Module Fault
Basic unit has detected a fault in connec-
tion with the VSD module
If fault occurs sporadically: Check CAN bus wiring.
Improve EMC.
If fault occurs constantly: Replace the defective basic unit
1F 01
VSD
module Speed Acquisition faulty
Internal VSD module test was not success-
ful
1F 02
VSD
module Wrong Direction of Rotation
Fan rotates in the wrong direction
Check to see if the motor’s direction of rotation is correct.
Check to see if the sensor disk on the motor is mounted the
correct way.
Change live conductor on the fan motor or check param-
eterized direction of rotation on the VSD and correct, if nec-
essary