Siemens LMV5 Series Basic Documentation page 201

Error Diagnostic Device
code code
21 - BU
22 - BU
23 - BU
24 - BU
25 - BU
26 - BU
27 - BU
28 - BU
29 - BU
2A - BU
2B - BU
2C - BU
2D - BU
2D 00 BU
2D 01 BU
2E - BU
Siemens Building Technologies Basic Documentation LMV51...
HVAC Products 15 Addendum 1: List of fault status messages of LMV51... system
Display
Safety Loop open
Safety chain open
Internal Temp Limiter has Internal TL has switched off because
responded parameterized value has been exceeded
Extraneous Light on Startup
Basic unit has detected extraneous light
during startup
Extraneous Light on Shutdown
Basic unit has detected extraneous light
during shutdown
No Flame at End of Safety Time No flame detected at the end of safety
time ts1
Loss of Flame Detection of loss of flame during operation
Air Pressure on Air pressure = on, but should have been
off
Air Pressure off Air pressure = off, but should have been
on
Fan Contactor Contact is on FCC signal = on, but should have been off
Fan Contactor Contact is off FCC signal = off, but should have been on
Flue Gas Recirculation Pressure FGR-PS = on, but should have been on
Switch on
Flue Gas Recirculation Pressure FGR-PS = off, but should have been on
Switch off
Valve not open Closed Position Indicator (CPI) = on, but
should have been off
Valve not open Closed Position Indicator (CPI) = on, but
should have been off
Valve not open (Only LMV52...) CPI via terminal
StartRelease_Gas
Closed Position Indicator (CPI) = on, but
should have been off
Valve or Closed Position Closed Position Indicator (CPI) = on, but
Indicator (CPI) open should have been off
Meaning for the LMV5x system Troubleshooting
Check the parameters or signal: DW-DK/CPI and
StartRelease_Gas
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CC1P7550en
01.10.2003