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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
1F 03 VSD module
Speed Acquisition faulty Pulse sequence and length at the speed
input were different from those antici-
pated
Check to see if sensor disk and speed sensor are correctly
mounted.
Check if the distance of the inductive sensor is correct.
Check if the inductive sensor is correctly connected
1F 04 VSD module
Standardization canceled because
of VSD
Fan was not able to keep the standard-
ized speed at a constant level
Check if motor runs.
Check if the inductive sensor is correctly connected.
Check if distance of inductive sensor is correct
1F 05 VSD module
Standardization canceled because
of Air Actuator
Air actuator has not reached the pre-
purge position. For this reason, speed
standardization is not possible
Check to see if all air-influencing actuators travel to the pre-
purge position.
Check to see if the relevant actuators are mechanically over-
loaded or replace defective actuator, if necessary.
Check power supply to the actuators
1F 06 VSD module
Speed Test was not successfully
completed
Internal VSD module speed test was not
successful
21 --- BU Safety Loop open Safety chain open
22 --- BU Internal Temp Limiter has re-
sponded
Internal TL has switched off because pa-
rameterized value has been exceeded
23 --- BU Extraneous Light on Startup Basic unit has detected extraneous light
during startup
23 00 BU Extraneous Light on Startup Basic unit has detected extraneous light
during startup
23 01/02/03 BU Extraneous Light on Startup (Only LMV52...) Basic unit has detected
extraneous light during startup
Coding by bits:
Bit 0 = flame QRI.../QRB... present
Bit 1 = flame ION present
24 --- BU Extraneous Light on Shutdown Basic unit has detected extraneous light
during shutdown
24 00 BU Extraneous Light on Shutdown Basic unit has detected extraneous light
during shutdown
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