Lennox International Inc 506510-01 installation instructions Detected in RUN

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

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506510−01