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Goodman GMVS960805CU AA User Manual

Goodman GMVS960805CU AA
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Service and Troubleshooting
*MVS96*U

Copyright © 2020 Goodman Manufacturing Company, L.P.
RS6612018r1
June 2020
TABLE OF CONTENTS
IMPORTANT INFORMATION ............................................ 2
PRODUCT IDENTIFICATION ........................................... 4
SYSTEM OPERATION ...................................................... 6
SCHEDULED MAINTENANCE ....................................... 21
SERVICING ..................................................................... 24
CHECKING VOLTAGE .............................................. 25
CHECKING WIRING .................................................. 25
CHECKNG THERMOSTAT, WIRING ........................ 25
CHECKING TRANSFORMER AND CONTROL
CIRCUIT ...................................................................... 25
CHECKING AIR CIRCULATOR BLOWER MOTOR 26
CHECKING DUCT STATIC ........................................ 26
CHECKING TEMPERATURE RISE .......................... 26
CHECKING PRIMARY LIMIT CONTROL ................. 27
CHECKING AUXILIARY LIMIT CONTROL ............... 27
INDUCED DRAFT BLOWER MOTOR ...................... 28
CECKING GAS VALVE (REDUNDANT) ................... 28
CHECKING GAS PRESSURE .................................. 28
CHECKING HOT SURFACE IGNITER ..................... 30
CHECKING PRESSURE TRANSDUCER ................ 30
CHECKING FOR DELAYED IGNITION .................... 31
CHECKING INTERGRATED IGNITION CONTROL
BOARDS ..................................................................... 31
CHECKING FLAME SENSOR ................................... 31
TROUBLESHOOTING CHART ....................................... 32
WIRING DIAGRAMS ....................................................... 39
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 qualied 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. 
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Cancer and Reproductive Harm -
www.P65Warnings.ca.gov
0140M00517-A

Questions and Answers:

Goodman GMVS960805CU AA Specifications

General IconGeneral
ModelGMVS960805CU AA
TypeGas Furnace
Efficiency Rating96% AFUE
Heating Capacity80, 000 BTU
Blower MotorVariable Speed
Fuel TypeNatural Gas
BTU Input80, 000 BTU
BTU Output76, 800 BTU
StagesTwo-Stage
ConfigurationUpflow/Horizontal
BrandGoodman
CategoryFurnace
Motor TypeECM
Warranty10-Year Parts Limited Warranty; Lifetime Heat Exchanger Limited Warranty

Summary

Important Information

Important Notices for Consumers and Servicers

Essential safety notices and warnings for users and service personnel.

Recognize Safety Symbols, Words and Labels

Guidance on understanding safety symbols, words, and labels for hazard identification.

Product Identification

Nomenclature

Details on furnace model identification and component part naming conventions.

System Operation

Safety

Critical safety precautions to be followed during installation, adjustment, and operation.

24 Volt Thermostat Wiring

Instructions for connecting a 24-volt thermostat to the furnace control system.

CoolCloudHVAC Phone Application - General Information

Overview of the phone application for setup, diagnostics, and system adjustments.

Scheduled Maintenance

Annual Inspection

Recommended annual inspection checklist for ensuring proper furnace operation and safety.

Clocking a Gas Meter

Step-by-step guide to measuring the furnace's gas input rate using a gas meter.

Servicing

Component I.D.

Diagram identifying key components of the furnace for servicing.

Checking Voltage

Procedures for measuring and verifying electrical voltage levels within the furnace.

Checking Temperature Rise

Method for measuring and adjusting the temperature rise for optimal heat exchanger performance.

Checking Gas Pressure

How to measure and adjust gas supply and manifold pressures for correct operation.

Checking Flame Sensor

Testing the flame sensor for proper micro-amp signal and cleaning if necessary.

Troubleshooting

Menu Options

Description of various menu options available for furnace configuration and diagnostics.

Status Codes

List and description of LED display status codes for system diagnostics.

Fault Code Recall

How to access and interpret the last six fault codes detected by the furnace.

Wiring Diagrams

Related product manuals