Troubleshooting Guide
Table of Contents:
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Start Here Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
SERVICE/STATUS CODE INSTRUCTIONS . . . . . . . . . . . . . . . . . 6
Rapid Flashing LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Status Code 11 - No Previous Code . . . . . . . . . . . . . . . . . . . . . . . . . 10
Status Code 12 - Blower on After Power Up . . . . . . . . . . . . . . . . . . 10
Status Code 13 - Limit Circuit Lockout . . . . . . . . . . . . . . . . . . . . . . 11
Status Code 14 - Ignition Lockout . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Status Code 21 - Gas Heating Lockout. . . . . . . . . . . . . . . . . . . . . . . 13
Status Code 22 - Abnormal Flame-proving Signal. . . . . . . . . . . . . . 14
Status Code 23 - Transducer Greater than 0.15” . . . . . . . . . . . . . . . 14
Status Code 24 - Secondary Voltage Fuse Open . . . . . . . . . . . . . . . 15
Status Code 25 - Setup Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Status Code 26 - Wiring Harness . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Status Code 31 - Transducer Does Not Sense Target Pressure . . . . 17
Status Code 34 - Ignition-Proving Failure . . . . . . . . . . . . . . . . . . . . 18
Status Code 42 - Inducer Motor Fault . . . . . . . . . . . . . . . . . . . . . . . 20
Status Code 45 - Control Circuitry Lockout. . . . . . . . . . . . . . . . . . . 21
CLEAN UP AND STARTUP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
COMBUSTION TONE MITIGATION . . . . . . . . . . . . . . . . . . . . . . 22
APPENDIX A - Furnace Control Board Layout . . . . . . . . . . . . . . . 23
APPENDIX B - Wiring and Connection Diagram . . . . . . . . . . . . . . 24
APPENDIX C - Transducer Pressure Check . . . . . . . . . . . . . . . . . . 25
APPENDIX D - Transducer Target Pressures . . . . . . . . . . . . . . . . . 26
APPENDIX E - Static Pressure Reading Locations . . . . . . . . . . . . . 27
QUICK REFERENCE INFORMATION. . . . . . . . . . . . . . . . . . . . . 29
Flame Sensor Microamperage . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Hot Surface Igniter Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
SERVICE TRAINING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance, or
use can cause explosion, fire, electrical shock, or other conditions which
may cause death, personal injury, or property damage. Consult a
qualified installer, service agency, or your distributor or branch for
information or assistance. The qualified installer or agency must use
factory-authorized kits or accessories when modifying this product.
Refer to the individual instructions packaged with the kits or accessories
when installing.
Installing and servicing heating equipment can be hazardous due to gas
and electrical components. Only trained and qualified personnel should
install, repair, or service heating equipment. Untrained personnel can
perform basic maintenance functions such as cleaning and replacing air
filters. All other operations must be performed by trained service
personnel. When working on heating equipment, observe precautions in
literature, on tags, and on labels attached to or shipped with furnace and
other safety precautions that may apply.
These instructions cover minimum requirements and conform to existing
national standards and safety codes. In some instances, these instructions
exceed certain local codes and ordinances, especially those that may not
have kept up with changing residential construction practices. We
require these instructions as a minimum for a safe installation.
This is the safety-alert symbol . When you see this symbol on the
furnace and in instructions or manuals, be alert to the potential for
personal injury.
58SU0A (Series 2 & 3)
Comfort™ 80% AFUE, Ultra Low NOx,
4-Way Multipoise Gas Furnace
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury and/or
death.
Carbon Monoxide (CO) is a colorless, odorless, and tasteless poisonous
gas that can be fatal when inhaled. Follow all installation, maintenance,
and service instructions. See additional information below regarding
the installation of a CO Alarm.
WARNING
!
FIRE, EXPLOSION, ELECTRICAL SHOCK, AND
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in dangerous operation,
personal injury, death, or property damage.
Improper installation, adjustment, alteration, service, maintenance, or
use can cause carbon monoxide poisoning, explosion, fire, electrical
shock, or other conditions which may cause personal injury or property
damage. Consult a qualified service agency, local gas supplier, or your
distributor or branch for information or assistance. The qualified
service agency must use only factory-authorized accessories and
replacement parts when installing and servicing this product.
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