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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Goodman Mfg CVC9/95, MVC95 Normal Sequence of Operation, Systemtroubleshooting, Power UP, Heatingmode

MVC95, CVC9/95 specifications

Goodman Manufacturing has established itself as a leader in the HVAC industry, and among its stellar lineup, the Goodman CVC9/95 and MVC95 stand out for their remarkable features, technologies, and efficiency.

The Goodman CVC9/95 is a high-performance gas furnace, designed for homeowners seeking reliability and cost-effective heating solutions. It operates with an impressive 95% Annual Fuel Utilization Efficiency (AFUE), which means that a significant portion of the fuel it consumes is converted into heat. This level of efficiency not only contributes to lower energy bills but also reduces greenhouse gas emissions, making it an environmentally friendly choice.

One of the standout features of the CVC9/95 is its multi-speed ECM blower motor. This technology adjusts the airflow according to the heating demands of the home, ensuring consistent and comfortable temperatures. The ECM motor also operates quietly, enhancing the comfort of your living space without the disruptive noise often associated with traditional furnaces.

The MVC95, on the other hand, offers similar efficiency with its also 95% AFUE rating. This model is equipped with a patented ignition system that enhances reliability with minimal maintenance needs. Its durable construction includes a heavy-gauge steel cabinet and an insulated blower compartment that minimizes heat loss. This design not only supports optimal performance but also contributes to its longevity.

Both models come with a self-diagnostic control board that provides straightforward troubleshooting capabilities, making it easier for technicians to ensure that your system is operating at peak performance. This feature aids in timely maintenance, which is crucial for extending the lifespan of the unit.

Additionally, Goodman backs their products with a strong warranty, offering a lifetime limited warranty on the heat exchanger and a 10-year limited parts warranty. This assurance provides homeowners peace of mind regarding their investment.

In the landscape of HVAC solutions, the Goodman CVC9/95 and MVC95 models exemplify a commitment to quality, efficiency, and advanced technology. Whether for new constructions or replacements, these furnaces offer superior heating performance coupled with modern conveniences, making them an invaluable choice for homeowners seeking effective climate control solutions. With their low emissions and high efficiency, choosing Goodman means investing in both comfort and sustainability.