Goodman Mfg CVC9/95 Normal Sequence of Operation, Systemtroubleshooting, Power UP, Heatingmode

NORMAL SEQUENCE OF OPERATION

LED	LED	Indication	Possible Causes	Corrective Action(s)	Notes & Cautions
	Status
	Off	ξ Normal condition	ξ None	ξ None	ξ None
	1 Flash	ξ Communications	ξ Communications	ξ Depress Learn Button	ξ Depress once
		Failure	Failure	ξ Verify that bus BIAS	quickly for a power-
Red				and TERM	up reset
				dipswitches are in the	ξ Depress and hold
Communications
				ON position.	for 2 seconds for
LED
					an out-of-box reset
	2 Flashes	ξ Out-of-box reset	ξ Control power up	ξ None	ξ None
			ξ Learn button
			depressed
	Off	ξ No power	ξ No power to furnace	ξ Check fuses and	ξ Turn power OFF
		ξ Communications	ξ Open fuse	circuit breakers;	prior to repair
		error	ξ Communications error	replace/reset
				ξ Replace blown fuse
				ξ Check for shorts in
				low voltage wiring in
				furnace/system
				ξ Reset network by
				depressing learn
				button
				ξ Check data 1/ data 2
				voltages
	1 Steady	ξ No network found	ξ Broken/ disconnected	ξ Check	ξ Turn power OFF
	Flash		data wire(s)	communications	prior to repair
			ξ Furnace is installed as	wiring (data 1/ data 2	ξ Verify wires at
			a legacy/ traditional	wires)	terminal blocks are
			system	ξ Check wire	securely twisted
Green Receive				connections at	together prior to
				terminal block	inserting into
LED				ξ Verify furnace	terminal block
				installation type	ξ Verify data1 and
				(legacy/ traditional or	data voltages as
				communicating)	described above
				ξ Check data 1/ data 2
				voltages
	Rapid	ξ Normal network	ξ Control is “talking” on	ξ None	ξ None
	Flashing	traffic	network as expected
	On Solid	ξ Data 1/ Data 2	ξ Data 1 and data 2	ξ Check	ξ Turn power OFF
		miss-wire	wires reversed at	communications	prior to repair
			furnace, thermostat,	wiring (data 1/ data 2	ξ Verify wires at
			or CT™ compatible	wires)	terminal blocks are
			outdoor AC/HP	ξ Check wire	securely twisted
			ξ Short between data 1	connections at	together prior to
			and data 2 wires	terminal block	inserting into
			ξ Short between data 1	ξ Check data 1/ data 2	terminal block
			or data 2 wires and R	voltages	ξ Verify data1 and
			(24VAC) or C (24VAC		data voltages as
			common)		described above

SYSTEMTROUBLESHOOTING

NOTE: Refer to the instructions accompanying the CT compatible outdoorAC/HP unit for troubleshooting information.

Refer to the Troubleshooting Chart in theAppendix for a listing of possible furnace error codes, possible causes and corrective actions.

NORMAL SEQUENCE OF OPERATION

POWER UP

The normal power up sequence is as follows:

•115 VAC power applied to furnace.

•Integrated control module performs internal checks.

•Integrated control module displays 88 on dual 7-segment display LED’s.

•Integrated control module monitors safety circuits continuously.

•Furnace awaits call from thermostat. Dual 7-segment LED’s display 0P while awaiting call from thermostat.

HEATINGMODE

The normal operational sequence in heating mode is as follows:

•R and W1 (or R and W1/W2) thermostat contacts close, initiating a call for heat.

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