Trane ACONT900AC43UA User manual

Air Conditioning Procedures
Service Guide
Communicating Residential
Comfort Systems
FirstEdition
© 2010 Trane Inc.
All rights reserved. No part of this book
may be reproduced, in any form or by
any means, without permission in
writing from the publisher.
Produced and printed in the USA
A Comprehensive Reference for Service of Communicating
Residential Air Conditioning, Heat Pump & Gas Furnace Systems
1.0

Air Conditioning Procedures
We appreciate your feedback.....
We value your opinion. If you feel this service guide can be improved in some way, please
give us your thoughts. Simply email your opinion to [email protected]. You may also
write in the space below, tear out this page and mail it to:
Trane Company
Attn: Loran Dailey
6200 Troup Hwy.
Tyler, TX 75707
Comments
Name:
Address:
Email:
Phone# Pub#034-3457-01

Air Conditioning Procedures
We appreciate your feedback.....
Name:
Address:
Email:
Phone# Pub# 034-3457-01
Comments
We value your opinion. If you feel this service guide can be improved in some way, please
give us your thoughts. Simply email your opinion to [email protected]. You may also
write in the space below, tear out this page and mail it to:
Trane Company
Attn: Loran Dailey
6200 Troup Hwy.
Tyler, TX 75707

Cautions & Warnings
A 1
SAFETYHAZARD
THIS INFORMATION IS INTENDED FOR USE BY
INDIVIDUALSPOSSESSINGADEQUATEBACKGROUNDS
OFELECTRICALANDMECHANICALEXPERIENCE.ANY
ATTEMPT TO REPAIR ACENTRALAIR CONDITIONING
PRODUCTMAYRESULTINPERSONALINJURYAND OR
PROPERTYDAMAGE.THEMANUFACTURERORSELLER
CANNOTBERESPONSIBLEFORTHEINTERPRETATION
OF THIS INFORMATION, NOR CAN IT ASSUME ANY
LIABILITYINCONNECTION WITHITSUSE.
WARNING
!
!WARNING
!WARNING
!WARNING
!WARNING
!WARNING
FIREOREXPLOSIONHAZARD
FAILURE TO FOLLOW THE SAFETY WARNINGS EXACTLY
COULDRESULTINSERIOUSPERSONALINJURY,PROPERTY
DAMAGE,ORDEATH.IMPROPERSERVICINGCOULDRESULT
INDANGEROUSOPERATION,SERIOUSPERSONALINJURY,
PROPERTYDAMAGE,ORDEATH.
SERVICEPROCEDURESHAZARD
BODILY INJURY CAN RESULT FROM HIGH VOLTAGE
ELECTRICAL COMPONENTS, FAST MOVING FANS,AND
COMBUSTIBLE GAS. FOR PROTECTION FROM THESE
INHERENT HAZARDS DURING INSTALLATION AND
SERVICING, THE ELECTRICAL SUPPLY MUST BE
DISCONNECTED AND THE MAIN GAS VALVE MUST BE
TURNEDOFF.IFOPERATINGCHECKSMUSTBEPERFORMED
WITH THE UNIT OPERATING, IT IS THE TECHNICIAN’S
RESPONSIBILITY TO RECOGNIZE THESE HAZARDS AND
PROCEEDSAFELY.
Throughout this manual there are procedures where voltage may be
present and gas or refrigerant system checks may be required. Read all
cautions and warnings on this page before proceeding.
Voltage Hazard
Disconnect power to the unit before removing the
blower door. Allow a minimum of 10 seconds for IFC
power supply to discharge to 0 volts. Failure to follow
this warning could result in property damage, personal
injury or death.
CARBONMONOXIDEPOISONINGHAZARD
FAILURE TO FOLLOW THE SERVICEAND/ OR PERIODIC
MAINTENANCE INSTRUCTIONS FOR THE FURNACE AND
VENTINGSYSTEM,COULDRESULTINCARBONMONOXIDE
POISONINGORDEATH.
!WARNING
FIREOREXPLOSIONHAZARD
SHOULDOVERHEATINGOCCUR,ORTHEGASSUPPLYFAIL
TO SHUT OFF, SHUT OFF THE GAS VALVE TO THE UNIT
BEFORESHUTTINGOFFTHEELECTRICALSUPPLY.FAILURE
TOFOLLOWTHISWARNINGCOULDRESULTINPROPERTY
DAMAGE,PERSONALINJURY,ORDEATH.
!CAUTION
Safety Hazard
Sharp Edge Hazard
Be careful of sharp edges on equipment or any cuts
made on sheet metal while installing or servicing.
Personal injury may result.
Where there is no complete return duct system, the
return connection must be run full size from the furnace
to a location outside the utility room, basement, attic,
or crawl space.
Do NOT install return air through the back of the furnace
cabinet.
Do NOT installreturnair throughthe sideof thefurnace cabinet
on horizontal applications.
NOTE: Minimum return air temperature is 55°F.
!CAUTION
CONTAINS REFRIGERANT!
SYSTEMCONTAINS OILAND REFRIGERANT UNDERHIGH
PRESSURE. RECOVER REFRIGERANT TO RELIEVE
PRESSUREBEFOREOPENINGSYSTEM.
Failure to follow proper procedures can result in
personal illness or injury or severe equipment damage.
LABELINGWIRES!
LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN
SERVICING CONTROLS. WIRING ERRORS CAN CAUSE
IMPROPERANDDANGEROUSOPERATION.VERIFYPROPER
OPERATIONAFTERSERVICING.
!CAUTION
!CAUTION
BURNHAZARD
DONOTTOUCHIGNITER.ITIS EXTREMELYHOT.

Cautions & Warnings
A 2

C - A 1
(A/T)CONT900AC43UA Installer Guide
4 Heat/3 Cool/ Heat Pump
Communicating Programmable 3-Wire Hookup
Introduction........................................................................................................................................ 3
Product specifications ................................................................................................................... 3
Installation.......................................................................................................................................... 3
When installing this product .......................................................................................................... 3
Location......................................................................................................................................... 4
Selecting Comfort Control location ............................................................................................... 4
Sub-base installation ..................................................................................................................... 4
Wiring............................................................................................................................................ 5
Mounting Comfort Control on sub-base......................................................................................... 6
Initial power-up .................................................................................................................................. 6
Power-upsequence ....................................................................................................................... 6
Discovery mode ............................................................................................................................ 6
Communicating indoor unit - Communicating outdoor unit ........................................................... 7
Communicating indoor unit - Single stage cooling unit ................................................................. 7
Adjusting real time clock .................................................................................................................. 7
Setting calendar and time ............................................................................................................. 7
Installer setup (ISU) ........................................................................................................................... 8
Entering installer setup .................................................................................................................. 8
Operation: Using the Comfort Control .......................................................................................... 18
System and fan settings .............................................................................................................. 18
Fan settings................................................................................................................................. 18
LED indication ............................................................................................................................. 18
Filter indication............................................................................................................................ 18
Pre-programmed ......................................................................................................................... 18
Alert code numbers ..................................................................................................................... 18
Equipment damage hazard. Minimum compressor off-time is bypassed during installer
System test ..................................................................................................................................19
System checkout ............................................................................................................................. 19
Installer system test..................................................................................................................... 19
Advanced features........................................................................................................................... 19
Adjustable continuous air flow ..................................................................................................... 19
Control response rate .................................................................................................................. 20
Cycle rate .................................................................................................................................... 20
Auto changeover ......................................................................................................................... 20
Communicating Controller
Section A

C - A 2
TCONT900AC43UA Installer’s Guide
4 Heat/3 Cool/ Heat Pump
Communicating Programmable 3-Wire Hookup
(A/T)CONT900AC43UA Installer Guide
Setpoint deadband ...................................................................................................................... 21
Backlit display ............................................................................................................................. 21
Filter reminders ........................................................................................................................... 21
Fan selections ............................................................................................................................. 21
Screen locked.............................................................................................................................. 21
Installer system tests ................................................................................................................... 21
Default factory settings................................................................................................................ 21
Wait indicator .............................................................................................................................. 22
Calibrate indoor temperature....................................................................................................... 22
Calibrate outdoor temperature .................................................................................................... 22
Outdoor temperature sensor ....................................................................................................... 22
Humidification.................................................................................................................................. 22
Indoor humidification control ....................................................................................................... 22
Frost control ................................................................................................................................ 22
Dehumidification ............................................................................................................................. 22
Integrated temperature and humidity control (ITHC)................................................................... 22
Droop ............................................................................................................................................23
Comfort-R™delay .........................................................................................................................23
Dehumidificationairflow .................................................................................................................23
Proprietaryhumidity control...........................................................................................................23
Special heat pump features ............................................................................................................ 23
Auxiliary heat lockout temperature..............................................................................................23
Compressor heat lockout temperature ........................................................................................ 23
Operation in heat mode............................................................................................................... 24
Defrost heater balance point control ........................................................................................... 24
Operation in emergency heat mode ............................................................................................ 24
Heat pump with fossil fuel heat (dual fuel) and outdoor temperature sensor .............................. 24
Troubleshooting guide ................................................................................................................... 25