Goodman MES96 U Series Service And Troubleshooting

Single stage ultra-low nox gas furnaces and accessories

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Service and Troubleshooting

Single Stage Ultra-Low NOx Gas Furnaces and Accessories

Pride and workmanship go into every product to provide

our customers with quality products. It is possible, however,

that during its lifetime a product may require service.

Products should be serviced only by a qualified service

technician who is familiar with the safety procedures

required in the repair and who is equipped with the proper

tools, parts, testing instruments and the appropriate service

manual. REVIEW ALL SERVICE INFORMATION IN THE

APPROPRIATE SERVICE MANUAL BEFORE

BEGINNING REPAIRS.

Only personnel that have been trained to install, adjust,

service or repair(hereinafter, "service") the equipment

specified in this manual should service the equipment. The

manufacturer will not be responsible for any injury or

property damage arising from improper service or service

procedures. If you service this unit, you assume responsi-

bility for any injury or property damage which may re-

sult. In addition, in jurisdictions that require one or more

licenses to service the equipment specified in this manual,

only licensed personnel should servise the equipment.

Improper installation, adjustment, servicing or repair of

the equipment specified in this manual, or attempting to

install, adjust, service or repair the equipment specified in

this manual without proper training may result in product

damage, property damage, personal injury or death.

PROP 65 WARNING

FOR CALIFORNIA CONSUMERS

Cancer and Reproductive Harm -

www.P65Warnings.ca.gov

WARNING

*MES96*U

IMPORTANT INFORMATION ............................................ 2

PRODUCT IDENTIFICATION ........................................... 4

SYSTEM OPERATION ...................................................... 6

SCHEDULED MAINTENANCE ....................................... 13

SERVICING ..................................................................... 16

CHECKING VOLTAGE .............................................. 17

CHECKING WIRING .................................................. 17

CHECKNG THERMOSTAT, WIRING ........................ 17

CHECKING TRANSFORMER AND CONTROL

CIRCUIT ...................................................................... 17

CHECKING AIR CIRCULATOR BLOWER MOTOR 18

CHECKING DUCT STATIC ........................................ 18

CHECKING TEMPERATURE RISE .......................... 19

CHECKING PRIMARY LIMIT CONTROL ................. 19

CHECKING AUXILIARY LIMIT CONTROL ............... 20

INDUCED DRAFT BLOWER MOTOR ...................... 20

CHECKING GAS VALVE (REDUNDANT) ................ 20

CHECKING GAS PRESSURE .................................. 21

CHECKING HOT SURFACE IGNITER ..................... 22

CHECKING PRESSURE TRANSDUCER ................ 22

CHECKING FOR DELAYED IGNITION .................... 23

CHECKING INTERGRATED IGNITION CONTROL

BOARDS ..................................................................... 23

CHECKING FLAME SENSOR ................................... 24

TROUBLESHOOTING CHART ....................................... 25

WIRING DIAGRAMS ....................................................... 28

0140M00517-A

RS6612017r2

June 2020

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Page 1: Table Of Contents
CHECKING FLAME SENSOR ........24 TROUBLESHOOTING CHART ........25 PROP 65 WARNING WIRING DIAGRAMS ............28 FOR CALIFORNIA CONSUMERS WARNING Cancer and Reproductive Harm - www.P65Warnings.ca.gov 0140M00517-A RS6612017r2 June 2020 Copyright © 2019-2020 Goodman Manufacturing Company, L.P.
Page 2: Important Information
IMPORTANT INFORMATION IMPORTANT NOTICES FOR CONSUMERS AND SERVICERS RECOGNIZE SAFETY SYMBOLS, WORDS AND LABELS Pride and workmanship go into every product to provide our customers with quality products. It is possible, however, that during its lifetime a product may require service. Products should be serviced only by a qualified service technician who is familiar with the safety procedures required in the repair and who is equipped with the proper tools, parts, testing in-...
Page 3 IMPORTANT INFORMATION CO can cause serious illness including permanent brain damage or death. B10259-216 Advertencia especial para la instalación de calentadores ó manejadoras de aire en áreas cerradas como estacionamientos ó cuartos de servicio. Las emisiones de monóxido de carbono pueden circular a través del aparato cuando se opera en cualquier modo.
Page 4: Product Identification
The model and manufacturing number are used for positive identification of component parts used in manufacturing. Please use these numbers when requesting service or parts information. Furnace Nomenclature Brand Minor Revision A- Amana® Brand G- Goodman® A - Initial Release V- GMC® B - 1st Revision Configuration...
Page 5 AMES960805CU AA 115 volt silicon nitride igniter. Left or right gas entry. Line voltage EAC & HUM terminals Goodman® Brand 96% Ultra-Low NOx Gas Furnace, This furnace complies with the GMES960403BU AA SCAQMD Rule 1111 14 ng/J NOx emission limit.. Up flow/Horizontal Left and Right,...
Page 6: System Operation
O PREVENT PERSONAL INJURY OR DEATH DUE TO IMPROPER INSTALLATION, instructions. ADJUSTMENT, ALTERATION, SERVICE OR MAINTENANCE, REFER TO THIS MANUAL. OR ADDITIONAL ASSISTANCE OR INFORMATION, CONSULT A Goodman brand GMES96*U and Amana brand AMES96*U ® ® QUALIFIED INSTALLER, SERVICE AGENCY OR THE GAS SUPPLIER.
Page 7 SYSTEM OPERATION National Fire Protection Association WARNING 1 Batterymarch Park Quincy, MA 02169-7471 O NOT OPERATE THE FURNACE WITH THE RAIN CAP REMOVED AS RECIRUCLATION OF THE FLUE GASES MAY OCCUR. ATER MAY ALSO CSA International COLLECT INSIDE THE LARGER COMBUSTIN AIR PIPE AND FLOW TO THE BURNER ENCLOSURE.
Page 8 SYSTEM OPERATION COMBUSTION AIR INTAKE PIPE OPTIONS: GAS SUPPLY AND PIPING The RF000142 coupling can be secured directly to the The furnace rating plate includes the approved furnace gas furnace intake coupling if condensation is occurring in the input rating. combustion air inlet pipe.
Page 9 SYSTEM OPERATION section for instruction on how to properly measure and adjust GAS PIPING CHECKS manifold “outlet” pressure. The furnace should operate Before placing unit in operation or after servicing, leak test for a minimum of 15 minutes before taking a combustion gas connections.
Page 10 SYSTEM OPERATION 115 VOLT LINE VOLTAGE CONNECTION OF ACCESSORIES (HUMIDIFIER AND ELECTRONIC AIR CLEANER The furnace integrated control module is equipped with line voltage accessory terminals for controlling power to an optional WARNING field-supplied humidifier and/or electronic air cleaner. The accessory load specifications are as follows: O AVOID THE RISK OF ELECTRICAL SHOCK, INJURY, OR DEATH, THE Turn OFF power to the furnace before installing any accessories.
Page 11 SYSTEM OPERATION prepurge. • Igniter warm up begins after 30 second prepurge expires. • Gas valves open at end of igniter warm up period, delivering gas to burners and establishing flame. • Integrated control module monitors flame presence. Gas valve will remain open only if flame is detected. •...
Page 12 SYSTEM OPERATION fan. and the combustion air intake pipe. • Integrated control module performs safety circuit checks. • Circulator blower is energized on low heat speed. (DCVK) Vent Termination Clearances Electronic air cleaner terminals are energized. 1. Determine termination locations based on clearances •...
Page 13: Scheduled Maintenance
SCHEDULED MAINTENANCE months or as required. WARNING Horizontal Unit Filter Removal HIGH VOLTAGE Filters in horizontal installations are located in the central ISCONNECT POWER BEFORE SERVICING OR return register. INSTALLING THIS UNIT. ULTIPLE POWER SOURCES MAY BE PRESENT. AILURE TO DO SO MAY CAUSE PROPERTY INDUCED DRAFT AND CIRCULATION BLOWERS DAMAGE, PERSONAL INJURY OR DEATH.
Page 14 SCHEDULED MAINTENANCE CLOCKING A GAS METER 1. Turn off all gas appliances in the home. 2. Turn on the furnace. Ensure the furnace is operating at a 100% firing rate on 2 stage and modulating furnace product. 3. Once heating cycle is at a steady state (typically 15 minutes of operation), use a stopwatch to time how long it takes the smallest unit of measure dial on the gas meter to make a full revolution.
Page 15 SCHEDULED MAINTENANCE 5. Use this formula to verify the Cubic Feet per Hour (CFH) input determined in step 4 is correct: (3600 x Gas Meter Dial Size) / Time (seconds) = Cubic Feet per Hour (CFH) 3600 is used as there are 60 seconds in a minute and 60 minutes in an hour.
Page 16: Servicing
SERVICING Component I.D. VENT PIPE CONNECTION COMBUSTION AIR CONNECTION PRESSURE SWITCHES BURNER ASSEMBLY GAS VALVE DRAFT INDUCER PRESSURE TRANSDUCER INTEGRATED CONTROL BOARD CONTROL TRANSFORMER...
Page 17: Checking Voltage
SERVICING CHECKING VOLTAGE THERMOSTAT AND WIRING WARNING WARNING HIGH VOLTAGE ISCONNECT POWER BEFORE SERVICING. ISCONNECT POWER BEFORE SERVICING OR CHANGING ANY ELECTRICAL WIRING. ULTIPLE POWER 1. Remove the blower compartment door to gain access to SOURCES MAY BE PRESENT. AILURE TO DO SO MAY CAUSE the thermostat low voltage wires located at the furnace PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
Page 18: Checking Air Circulator Blower Motor
SERVICING the motor is a 24vAC signal to the speed tap. . 1. Remove blower compartment door to gain access to the thermostat low voltage wires located at the furnace WARNING integrated control module. 2. Remove the thermostat low voltage wires at the furnace ISCONNECT POWER BEFORE SERVICING.
Page 19: Checking Temperature Rise
SERVICING CHECKING TEMPERATURE RISE The more air (CFM) being delivered through a given furnace, the less the rise will be; so the less air (CFM) being delivered, the greater the rise. The temperature rise should be adjusted in accordance to a given furnace specifications and its Style 1 external static pressure.
Page 20: Checking Auxiliary Limit Control
SERVICING CHECKING AUXILIARY LIMIT CONTROL WARNING O AVOID POSSIBLE FIRE, ONLY RESET THE AUXILIARY LIMIT CONTROL ONCE. F IT SHOULD OPEN A SECOND TIME, A QUALIFIED SERVICER MUST DETERMINE WHY THE AUXILIARY LIMIT OPENED BEFORE AUXILIARY LIMIT RESETTING AGAIN. CONTROL INDUCED DRAFT BLOWER MOTOR BLOWER HOUSING WARNING...
Page 21: Checking Gas Pressure
SERVICING WARNING ALL G ISCONNECT AS AND LECTRICAL OWER UPPLY. Orifices should be treated with care in order to prevent damage. They should be removed and installed with a box- end wrench in order to prevent distortion. In no instance should an orifice be peened over and redrilled.
Page 22: Checking Hot Surface Igniter
SERVICING Gas Manifold Pressure Measurement and d. Turn on power and close thermostat “R” and “W” contacts to provide a call for low stage heat. Adjustment e. Measure the gas manifold pressure with burners firing. Adjust manifold pressure using the Manifold Gas CAUTION Pressure table shown below.
Page 23: Checking For Delayed Ignition
SERVICING will execute the following functions: WARNING 1. Blower - “Heat” Speed 15 seconds 2. Blower - “Cool” Speed 15 seconds INE VOLTAGE NOW PRESENT 3. Blower - “Fan” Speed 15 seconds 4. Hot Surface Igniter 17 seconds CHECKING PRESSURE TRANSDUCER (96% ULN) 5.
Page 24: Checking Flame Sensor
SERVICING measuring voltage between Pin 4 & 5 (black & white wire on 5 pin connector.) 4. If voltage is present in Steps 1 through 3 and the induced draft blower is operating, check for 120 volts to the ignitor during the preheat cycle.
Page 25: Troubleshooting Chart
TROUBLESHOOTING...
Page 26 TROUBLESHOOTING...
Page 27 TROUBLESHOOTING Fault Code Recall Function: When the SW1 button is pressed momentarily, the control displays the last five (5) fault codes recorded in non- volatile memory upon demand. Operation: Any time the control is powered, the fault code history can be retieved for display by depressing and releasing the SW1 button once (less than 5 seconds);...
Page 28: Wiring Diagrams
WIRING DIAGRAMS AUTO REST BURNER TEMPERATURE CONTROL HUMIDIFIER INTEGRATED CONTROL MODULE TR (11) PRESSURE SWITCH GND (8) MVC (9) AUTO RESET VALVE BAFFLE LIMIT MV(12) FRONT COVER ID BLOWER PRESSURE PRESSURE PRESSURE TRANSDUCER SWITCH SWITCH PT (3) PT (2) PT (1) MICRO HLI (7) HLO (4)
Page 29 GOODMAN BRAND ® AMANA BRAND ® is a registered trademark of Maytag Corporation or its related companies and is used under license. ® All rights reserved. Copyright © 2019-2020 Goodman Manufacturing Company, L.P.

This manual is also suitable for:

Ames960403bu aa Ames960603bu aa Ames960805cu aa Gmes960403bu aa Gmes960603bu aa Gmes960805cu aa

Goodman MES96 U Series Service And Troubleshooting

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