Siemens LME7 Series Technical Instructions

LME Series
Technical Instructions
Document No. LME-1000
SCC Inc. Page 7 Section 7
Other Common Faults
Known Causes of Loc 10
Lo
c 10 is a catchall fault that can be caused by a variety of issues. All known causes of Loc 10
are listed below in Table 7-1.
Table 7-1: All Known Causes of Loc 10
Cause # LME71/73/75
Description P
hase Corrective Action
1 All
L
ine power is directly connected
to safety loop input X3-04.1
OFF
Power to the safety loop
must be sourced from
t
erminal X3-04.2
2
L
ME73/75
only
PV jumper missing 40
Add a jumper between
terminals X2-09B.7 and
X
2-09B.8
3 All
L
ine power directly connected to
blower output terminal X2-01.3
OFF
Correct feedback/wiring
error
4 All K4 relay contacts welded 2
1
With no power on the LME7,
check continuity across pins
X
2-01.3 and X2-02.3. If there
is continuity, replace the
LME7. See Note 1 below.
5 All
L
ine power directly connected to
POC source terminal X2-02.3
OFF
Correct feedback/wiring
error
6 All
L
ine power directly connected to
SV output terminal X6-03.3
OFF
Correct feedback/wiring
error
7 All
A
mbient temperature exceeds
140°F
OFF
Adjust the temperature back
within the controller’s
a
cceptable range. Add
enclosure cooling if
necessary.
8 All
F
lame failure incorrectly being
logged as Loc 10
44, 50
Adjust combustion to avoid
flame failures during light-off
N
otes:
1. It is likely that the rating on the blower motor output X2-01.3 was exceeded.
Output X2-01.3 has a 2 Amp rating at 120 V, 50/60 Hz.

Siemens LME7 Series Specifications

General

Brand	Siemens
Model	LME7 Series
Category	Controller
Language	English