GMES8 GCES8 Installation Instructions

ManualsBrandsGoodman ManualsGas Furnaces80% AFUE GMES80 Gas Furnace Multi-Speed ECM, Single-Stage, Upflow/Horizontal, 60,000 BTU - A Cabinet

RESETTING FROM LOCKOUT

Furnace lockout results when a furnace is unable to achieve igni-

tion after three attempts. It is characterized by a non-functioning

furnace and a one flash diagnostic LED code from the red LED. If

the furnace is in “lockout ”, it will (or can be) reset in any of the

following ways.

1. Automatic reset. The integrated control module will

automatically reset itself and attempt to resume normal

operations following a one hour lockout period.

2. M anual power interruption. Interrupt 115 volt power to

the furnace for 1 - 20 seconds.

3. M anual thermostat cycle. Lower the thermostat so that

there is no longer a call for heat for 1 - 20 seconds then

reset to previous setting.

NOTE: If the condition which originally caused the lockout still

exists, the control will return to lockout. Refer to the Diagnostic

Chart for aid in determining the cause.

AINTENANCE

AVOID

ELECTRICAL

SHOCK

INJURY

DEATH

DISCONNECT

ELECTRICAL

POW ER

BEFORE

PERFORM ING

ANY

M AINTENANCE

. I

YOU

M UST

HANDLE

THE

IGNITER

HANDLE

W ITH

CARE

. T

OUCHING

THE

IGNITER

ELEM ENT

W ITH

BARE

FINGERS

ROU GH

HANDLING

VIBRATION

COU LD

DAM AGE

THE

IGNITER

RESULTIN G

PREM ATURE

FAILURE

. O

NLY

QUALIFIED

SERVICER

SHOULD

EVER

HANDLE

THE

IGNITER

WARNING

ANNUAL INSPECTION

The furnace should be inspected by a qualified installer, or ser-

vice agency at least once per year. This check should be performed

at the beginning of the heating season. This will ensure that all

furnace components are in proper working order and that the

heating system functions appropriately. Pay particular attention

to the following items. Repair or service as necessary.

• Flue pipe system. Check for blockage and/ or leakage.

Check the outside termination and the connections at

and internal to the furnace.

• Heat exchanger. Check for corrosion and/ or buildup

within the heat exchanger passageways.

• Burners. Check for proper ignition, burner flame, and

flame sense.

• Wiring. Check electrical connections for tightness and/

or corrosion. Check wires for damage.

• Filters.

temperature sensors. This limit guards against burner flames

not being properly drawn into the heat exchanger.

PRESSURE SW ITCHES

The pressure switches are normally-open, negative air pressure-

activated switches. They monitor the airflow (combustion air and

flue products) through the heat exchanger via pressure taps lo-

cated on the induced draft blower. These switches guard against

insufficient airflow (combustion air and flue products) through

the heat exchanger.

FLAM E SENSOR

The flame sensor is a probe mounted to the burner/ manifold as-

sembly which uses the principle of flame rectification to deter-

mine the presence or absence of flame.

ROUBLESHOOTING

ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS

NOTE: Discharge body’s static electricity before touching unit.

An electrostatic discharge can adversely affect electrical

components.

Use the following precautions during furnace installation and ser-

vicing to protect the integrated control module from damage. By

putting the furnace, the control, and the person at the same elec-

trostatic potential, these steps will help avoid exposing the inte-

grated control module to electrostatic discharge. This procedure

is applicable to both installed and uninstalled (ungrounded) fur-

naces.

1. Disconnect all power to the furnace. Do not touch the

integrated control module or any wire connected to the

control prior to discharging your body’s electrostatic

charge to ground.

2. Firmly touch a clean, unpainted, metal surface of the

furnace away from the control. Any tools held in a person’s

hand during grounding will be discharged.

3. Service integrated control module or connecting wiring

following the discharge process in step 2. Use caution not

to recharge your body with static electricity; (i.e., do not

move or shuffle your feet, do not touch ungrounded objects,

etc.). If you come in contact with an ungrounded object,

repeat step 2 before touching control or wires.

4. Discharge your body to ground before removing a new

cont rol from its container. Follow steps 1 through 3 if

installing the control on a furnace. Return any old or new

controls to their containers before touching any

ungrounded object.

DIAGNOSTIC CHART

Refer to the troubleshooting chart in the Appendix for assistance

in determining the source of unit operational problems. The red

diagnostic LED blinks to assist in troubleshooting the unit. The

number of blinks refer to a specific code.