Siemens LMV5 Quick Start Manual page 148

Error Diag.
Device Display
code code
Extraneous Light
Any #
on Startup
Extraneous Light
23 00
on Startup
LMV5 /
01... Extraneous Light
Flame
03 on Startup
Dect.
Extraneous Light
Any #
on Shutdown
Extraneous Light
24
00
on Shutdown
01... Extraneous Light
03 on Shutdown
No Flame at End
Any #
of Safety Time
No Flame at End
00
25
of Safety Time
Devices
01... No Flame at End
conn. To
03 of Safety Time
LMV5/
Flame
Detect.
Any #
00
26 Loss of Flame
01...
03
27 Air Pressure on Air pressure = on, but should have been off
Devices
28 Air Pressure off Air pressure = off, but should have been on
conn. To
Fan Contactor
Any #
29
LMV5 /
Contact is on
LMV5
Fan Contactor
2A
Contact is off
LMV5 QSG Rev 4
Meaning for the LMV5x system
Fault with devices or wiring connected to the Base Unit (LMV5)
Basic unit has detected extraneous light during startup
Basic unit has detected extraneous light during startup
(LMV52 only) Basic unit has detected extraneous light during
startup 0 = QRI, 1 = ION or UV, 2 = Both
Basic unit has detected extraneous light during shutdown
Basic unit has detected extraneous light during shutdown
(LMV52 only) Basic unit has detected extraneous light during
shutdown 0 = QRI, 1 = ION or UV, 2 = Both
No flame detected at the end of safety time TSA1
No flame detected at the end of safety time TSA1
(LMV52 only) No flame detected at the end of the safety time. 0
= QRI, 1 = ION or UV, 2 = Both
Loss of flame during normal operation (Phase 60-62)
Loss of flame during normal operation (Phase 60-62)
(LMV52 only) Loss of flame during operation detected. 0 = QRI,
1 = ION or UV, 2 = Both
FCC signal = on, but should have been off
FCC signal = off, but should have been on
Sec 5 Pg 22
Corrective action
1) Ensure that the source of extraneous light is not a
flame. If it is a flame, take corrective action immediately.
2) If the QRI scanner is used, ambient light can cause
an extraneous light error. Ensure sensor is viewing a
dark area such as the inside of a boiler.
3) If the QRI scanner is used, check for glowing
refractory. If glowing refractor is the cause, the afterburn
time may need to be lengthened or a UV scanner may
have to be used.
1) With a piloted gas train, this means that the pliot did
not light. Check wiring of ignition transformer and pilot
valve.
2) Check manual shutoff valves for the pilot gas.
3) Check position of air damper. Close further if
necessary. Pilot may be blowing out.
4) Check flame detector for signal in the presence of
flame using a flame source. Replace if detector does not
generate the anticipated signal.
1) Check flame detector for signal in the presence of
flame using a flame source. Replace if detector does not
generate the anticipated signal.
2) Check for flame signal "decay" as burner refractory
heats up. If this happens a UV scanner may be needed.
1) Make sure blower starts in Phase 22, Shuts off in
Phase 78 or 83. (See sequence diagrams)
2) Check setpoint on air pressure switch. Raise setpoint
if necessary. Swich should open after Postpurge.
3) If a FCC fault occurs in Phase 70, call a siemens
representitive. A quecharc may be necessary.
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