Lennox Signature XC17 Installation Instructions Manual page 38

Outdoor Main
Control LEDs
DS15 DS13
Yellow Red
5 Flashes
then OFF
Pause
6 Flashes
then OFF
Pause
7 Flashes
then
OFF
Pause
8 Flashes
then OFF
Pause
9 Flashes
then
OFF
Pause
Fast simultaneous
flashing of DS11,
DS13, DS14 and
DS15
506510−01
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Possible Possible
Condition Condition
Cause(s) Cause(s)
Compressor has
an open circuit
due to power dis-
Open Circuit
connection, fuse
is open or other
similar conditions.
Current not
Open Start
sensed by Start
Circuit
transformer.
Current not
Open Run
sensed by run
Circuit
transformer.
Welded Compressor
Contactor always runs
Secondary 24VAC is below
Low Voltage 18VAC.
OEM Mode Factory Test Mode.
search engine
Solution Solution
1
Outdoor unit power disconnect is open.
2
Unit circuit breaker or fuse(s) is open.
3
Unit contactor has failed to close.
S
Check compressor contactor wiring and con-
nectors
S
Check for compressor contactor failure (burned,
pitted or open)
S
Check wiring and connectors between supply and
compressor
S
Check for low pilot voltage at compressor con-
tactor coil
4
High pressure switch is open and requires manual
reset.
5
Open circuit in compressor supply wiring or con-
nections.
6
Unusually long compressor protector reset time due
to extreme ambient temperature.
7
Compressor windings are damaged.
S
Check compressor motor winding resistance
1
Run capacitor has failed.
2
Open circuit in compressor start wiring or connec-
tions.
S
Check wiring and connectors between supply and
the compressor S terminal
3
Compressor start winding is damaged.
S
Check compressor motor winding resistance
1
Open circuit in compressor start wiring or connections.
S
Check wiring and connectors between supply and
the compressor R terminal
2
Compressor start winding is damaged.
S
Check compressor motor winding resistance
1
Compressor contactor failed to open.
2
Thermostat demand signal not connected to module.
1
Control circuit transformer is overloaded.
2
Low line voltage (contact utility if voltage at disconnect
is low).
S
Check wiring connections
Page 38
Clearing Status Clearing Status
Clears after one normal
compressor run cycle or
power reset.
Clears when amperage is
detected in RUN and
START sensors, or after
power reset.
Clears when amperage is
detected in RUN and
START sensors, or after
power reset.
Clears after one normal
compressor run cycle or
after power reset.
Clears after voltage is higher
than 20VAC for two
seconds, or after power
reset.