Siemens LMV51 Series - Page 241

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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
A9 # VSD module Fault VSD Module VSD module has detected own fault and
reported it to the basic unit.
Type of fault: See diagnostic code
A9 01 VSD module Internal Fault VSD Module CRC fault during ROM test *1)
A9 02 VSD module Internal Fault VSD Module CRC fault during RAM test *1)
A9 04 VSD module Internal Fault VSD Module Fault during key value check *1)
A9 05 VSD module Internal Fault VSD Module Error code for time block overflow *1)
A9 07 VSD module Internal Fault VSD Module Sync fault or CRC fault *1)
A9 08 VSD module Internal Fault VSD Module Error code for main loop counter *1)
A9 09 VSD module Internal Fault VSD Module Fault during stack test *1)
A9 0A VSD module Internal Fault VSD Module Max IRQ speed reached Possibly interference on the line to the speed sensor, check
cable routing, use shielding
*1)
A9 0C VSD module Alarm from VSD VSD reports a fault to the VSD module Fault has been triggered by the VSD.
Read VSDs error code.
Check VSD settings (ramps, motor settings), increase ramp
time on VSD and basic unit, if necessary.
Check combination VSD / motor size
A9 0D VSD module Control Range Limitation VSD
Module
VSD module could not offset speed differ-
ential within its control limits
Check to see if the current interfaces of VSD and VSD
module use the same setting (0/4...20 mA).
Standardize the speed.
!! Note !!
After standardizing the speed -> check setting of combus-
tion mixture !
A9 0E VSD module Internal Fault VSD Module Fault during the speed calculation test *1)
A9 15 VSD module Internal Fault VSD Module CAN bus fault, disturbed CAN bus trans-
missions
If fault occurs sporadically: Check CAN bus wiring.
Improve EMC.
Check terminating resistors and correct, if necessary