Siemens LMV5 Quick Start Manual page 130

Load Controller General
If faults occur with the load controller, first consult Figure 5-1.1 to ensure that there are not mode
sensor or signal conflicts.
1) Next, check to see that the wiring of the sensors is in accordance with Section 3-3.
2) If this fails to cure the problem, verify the analog signal to the LMV5.
3) Replace the sensors if necessary.
Note: On older LMV5's, in mode 5 or mode 6 (ExtLC modes), parameter path:
Params&Display>Load Controller>Controller >Configuration>LC_OptgMode is not accessable.
To change the load controller settings, use: Params&Display>System Config>LC_OptgMode.
Flame Detector
The flame detector wiring is typically another frequent
source of wiring errors. These errors are due a
misunderstanding of the markings on plug X10-02,
and the LMV5 terminals.
The plug that is typically furnished with the LMV5
only covers terms X10-02.2 to X10-02.6.
Terminal X10-02.1 and terminal X10-03.1 are not
included in the X10-02.2 plug.
There are 2 open terminals, X10-02.1 and X10-03.1.
Never subject the QRI flame scanner to line voltage.
If Pin 6 QRI SIG, is subjected to line voltage,
it will destroy the QRI, and it will damage the LMV5,
and must to be replaced. Also see Section 3-3.
Safety loop
1) The safety loop wired between terminals X3-04.2 and X3-04.1 is meant for safety limits only,
such as auxiliary low water cut out and the high limit.
2) On occasion, operating (cycling) switches are wired into this loop - this is incorrect.
If a cycling switch is placed in this loop, and cycles off, the LMV5 will lockout.
3) If an external load controller (such as a RWF40) is used, or the LMV5 load controller is in any
external load controller modes (ExtLC modes 1, 5, 6), then a cycling switch should be put in
series with the burner on /off switch wired to X5-03.1.
4) If any of the internal load controller modes are used (IntLC modes 2, 3, 4) then a cycling switch
wired to X5-03.1 is not necessary, since this is done automatically in the LMV5.
5) The parameter InputController can activate or deactivate terminal X5-03.1. See section 4-2
6) If a burner flange (oil drawer) switch is not used, a jumper must be placed between terminals
X3-03.1 and X3-03.2. If this is not done, a fault will occur stating that the safety loop is open.
LMV5 QSG Rev 4
Figure 5-1.2 Plug X10-02.2 as it
would be seen plugged into an LMV5
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