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TROUBLESHOOTING

37

Symptom

LED Status 

Fault Description

Corrective Actions

Induced draft blower and 

circulator blower runs 

continuously

No furnace operation



Flame sensed with no call for 

heat

Short to ground in flame sense 

circuit

Lingering burner flame

Slow closing gas valve

Correct short at flame sensor or in flame sensor 

wiring

Check for lingering or lazy flame

Verify proper operation of gas valve

No furnace operation



Open fuse

Short in low voltage wiring

Replace fuse

Locate and correct short in low voltage wiring

Normal furnace operation



Flame sense micro amp signal is 

low

Flame sensor is coated/oxidized

Flame sensor incorrectly 

positioned in burner fame

Lazy burner flame due to 

improper gas pressure or 

combustion air

Clean flame sensor if coated or oxidized

Inspect for proper flame sensor alignment

Check inlet air piping for blockage, proper length, 

elbows, and termination

Compare current gas pressure to rating plate and 

adjust as needed

Furnace fails to operate



Problem with igniter circuit

Improperly connected or shorted 

igniter

Poor unit ground

Igniter relay fault on integrated 

control module

Check and correct wiring from integrated control 

module to igniter

Diagnose and replace shorted igniter as needed

Verify and correct unit ground wiring if needed

Check igniter output from control, replace if 

necessary

Furnace fails to operate on 

high stage; furnace operates 

normally on low stage

Induced draft blower 

operating



High stage pressure switch 

circuit is closed at start of 

heating cycle.

High stage pressure switch 

contacts sticking

Shorts in pressure switch circuit 

wiring

Diagnose and replace high stage pressure switch if 

needed

Repair short in wiring

Furnace fails to operate on 

high stage; furnace operates 

normally on low stage

Induced draft blower 

operating



High stage pressure switch 

circuit is not closed

Furnace is operating on low 

stage only

Inspect pressure switch hose, repair/replace if 

necessary

Inspect flue and/or inlet air piping for blockage, 

proper length, elbows, and termination

Check drain system, correct as necessary

Check induced draft blower performance, correct 

as necessary

Tighten or correct wiring connection

Furnace fails to operate

A

Polarity of 115 volt AC is 

reversed

Poor unit ground

Correct polarity, check and correct wiring if 

necessary

Verify proper ground, correct if necessary

Furnace fails to operate



Gas valve is not energized when 

it should be

External Gas Valve Error                                                                                                                                                                                                                                                                                                               

Check wiring in gas valve circuit

Replace integrated control board

Furnace fails to operate

C

Gas valve is energized when it 

should not be

Internal gas valve error                                                                                                                                                                                                                                                                                                               

Check wiring in gas valve circuit

Replace integrated control board

Summary of Contents for AMVS960603BU AA

Page 1: ...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 appropriat...

Page 2: ...arts testing in struments and the appropriate service manual REVIEWALL SERVICEINFORMATIONINTHEAPPROPRIATESERVICE MANUAL BEFORE BEGINNING REPAIRS OUTSIDE THE U S call 1 713 861 2500 Not a technical ass...

Page 3: ...El mon xido de carbono puede causar enfermedades severas como da o cerebral permanente muerte Las emisiones de mon xido de carbono pueden circular a trav s del aparato cuando se opera en cualquier mo...

Page 4: ...ENTIFICATION 4 NOMENCLATURE 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 i...

Page 5: ...s Steel tubular heat exchanger 115 volt silicon nitride igniter Left or right gas entry Line voltage EAC terminal GMVS96 U GMVS960603BU AA GMVS960805CU AA Goodman Brand 96 Ultra Low NOx Gas Furnace 1...

Page 6: ...the U S A this furnace can be used in the following non industrial commercial applications Schools Office buildings Churches Retail stores Nursing homes Hotels motels Common or office areas In all app...

Page 7: ...T IN PROPERTY DAMAGE EQUIPMENT DAMAGE PERSONAL INJURY OR DEATH Condensate Drain Lines and Drain Trap Acondensing gas furnace achieves its high level of efficiency by extracting almost all of the heat...

Page 8: ...ply pressures must be maintained within the ranges specified below The supply pressure must be constant and available with all other household gas fired appliances operating The minimum gas supply pre...

Page 9: ...l altitudes the air temperature rise must be within the range listed on the the Specification Sheet applicable to your model for the fuel used Manifold pressure adjustments and combustion analysis are...

Page 10: ...all after the power is turned on will run the outdoor unit at full capacity until the call is removed Use this mode for charging If system is running low stage cooling just cycle power and provide a c...

Page 11: ...arget Runtime the temporary heat pump hold will be completely removed and the heat pump will become the primary heat source again if it fails to do so the strike count against the furnace will be rese...

Page 12: ...mps up to full cooling demand airflow by first stepping up to 50 of the full demand for 30 seconds The motor then ramps to 100 of the required airflow A one 1 minute OFF delay at 100 of the cooling ai...

Page 13: ...D ehum Optional Optional Optional if feature supported by thermostat L1 L2 INDOOR BOARD TERMINAL CONNECTIONS OUTDOOR BOARD TERMINAL CONNECTIONS OUTDOOR TRANSFORMER 24V AC 240V GROUNDRECOMMENDED FIELDP...

Page 14: ...Refer to the low voltage wiring diagrams for additional wiring details Dehumidistat close on humidity rise R C G Y D ehum Dehumidistat close on humidity rise Figure 41 Fossil Fuel Applications This f...

Page 15: ...105 C All line voltage wire splices must be made inside the furnace junction box Auxiliary Alarm Switch The control is equipped with a 24VAC Aux Alarm to be used for a condensate switch install desig...

Page 16: ...sfully been completed the user will have access to system information once in range Option 2 Remove the furnace door ensure the control has power and then read the 3 digits The code will temporarily r...

Page 17: ...scroll through Menus L6F Lm Cr Sr and rFd 4 Press and release the Center Button The center button is used to enter menus and make selections within menus 5 What will be displayed is the currently sele...

Page 18: ...d increments Gas Heat Trim Factor Option Menu Gas Heat airflow may be trimmed from 10 to 10 in 2 increments Gas Heat Stage Multiplier Menu CFM This menu allows adjustment of the low fire CFM multiplie...

Page 19: ...or otherwise trap condensate Use longest radius fittings possible If using 3 venting make the transition from 2 to 3 as close as practically possible Make sure there is no flue gas recirculation into...

Page 20: ...are for vertical or horizontal termination of the combustion air inlet and the exhaust vent pipes on Category IV gas fired condensing furnaces The DCVK 30 kit can be used for 3 diameter pipe systems...

Page 21: ...DRAFT AND CIRCULATION BLOWERS The bearings in the induced draft blower and circulator blower motors are permanently lubricated by the manufacturer No further lubrication is required Check motor windin...

Page 22: ...2 164 327 655 1636 37 97 195 486 12 75 150 300 600 1500 38 23 47 95 189 474 13 69 138 277 555 1385 39 92 185 462 14 64 129 257 514 1286 40 22 45 90 180 450 15 60 120 240 480 1200 41 176 439 16 56 113...

Page 23: ...t As the external static pressure goes up the temperature rise will also increase Consult the proper tables for tempera ture rise limitation BTU HR Calculation Example The unit being tested takes 40 s...

Page 24: ...SERVICING 24 GAS VALVE BURNER ASSEMBLY PRESSURE TRANSDUCER INTEGRATED CONTROL BOARD CONTROL TRANSFORMER PRESSURE SWITCHES VENT PIPE CONNECTION COMBUSTION AIR CONNECTION DRAFT INDUCER Component I D...

Page 25: ...wires must be replaced replace with AWM 105 C 2 64 thick insulation of the same gauge or its equivalent CHECKING THERMOSTAT WIRING DISCONNECT ALL POWER BEFORE SERVICING WARNING 1 Remove the blower co...

Page 26: ...motor reinstall blower compartment door 6 Turn on electrical power and verify proper unit operation DISCONNECT ALL POWER BEFORE SERVICING WARNING CHECKING DUCT STATIC The maximum and minimum allowabl...

Page 27: ...erature rise Decrease blower speed to increase temperature rise Refer to Circulator Blower Speed section in the Product Design section of this manual for speed changing details Temperature rise is rel...

Page 28: ...uced draft blower This voltage to the IBD will vary between furnace models and is dependent on what percentage of maximum fire is being called for The power wires are colored red white and black A gre...

Page 29: ...e etc and or consult with local gas utility WARNING HIGH VOLTAGE DISCONNECT ALL ELECTRICAL POWER AND SHUT OFF GAS SUPPLY BEFORE SERVICING OR INSTALLING THIS UNIT MULTIPLE POWER SOURCES MAY BE PRESENT...

Page 30: ...E PERSONAL INJURY OR DEATH 6 Turn on gas to furnace and check for leaks If leaks are found repair and then reinstall burner compartment door 7 Turn on electrical power and verify proper unit operation...

Page 31: ...ition control No voltage Check transformer room thermostat and wiring If you have 24 volts coming off the transformer but receive approximately 13 volts on the terminal board between C and R check for...

Page 32: ...utively satisfy the thermostat under the set target time for this number of cycles the system will transition to the heat pump for primary heating dP Menu is enabled if the CF menu is set to 6 this pe...

Page 33: ...ge non communicating units AC Compressor Cooling Single Stage single stage non comm units AC1 Compressor Cooling Low Stage communicating units AC2 Compressor Cooling High Stage communicating units dHU...

Page 34: ...a set is correct for the specific model re populate data using correct memory card if required Furnace operates at reduced performance Airflow delivered is less than expected Circulator blower motor i...

Page 35: ...r Furnace fails to operate 1 Analog Pressure Error Blocked Vent Error Need to check the APS Sensor or its connection if this error is occurred The failure conditions occur as per the following for 5 s...

Page 36: ...essure switch circuit is closed at start of heating cycle Low stage pressure switch contacts sticking Short in pressure switch circuit wiring Replace low stage pressure switch Repair short in wiring I...

Page 37: ...erify and correct unit ground wiring if needed Check igniter output from control replace if necessary Furnace fails to operate on high stage furnace operates normally on low stage Induced draft blower...

Page 38: ...ch condensate switch open Check evaporator drain pan trap piping Fault Code Recall Accessing the furnace s diagnostic menu provides access to the last six faults detected by the furnace Faults are sto...

Page 39: ...ED CONTROL PK C USE COPPER CONDUCTORS ONLY AT LEAST 105 IT MUST BE REPLACED WITH WIRING MATERIAL HAVING A TEMPERATURE RATING OF 3 IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE FURNACE MUST BE REPLA...

Page 40: ...contact us Amana Brand Products http www amana hac com about us contact us You can also scan the QR code on the right for the product brand you purchased to be directed to the feedback page GOODMAN B...

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