Service and Troubleshooting
RS6200007r25
April 2021
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 qualied 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.
©2020-2021 Goodman Manufacturing Company, L.P.
Brand
®
is a registered trademark of Maytag Corporation or its related companies and is used under license. All rights reserved.
TABLE OF CONTENTS
IMPORTANT INFORMATION ............................................ 2
PRODUCT INFORMATION ............................................... 4
SYSTEM OPERATION .................................................... 18
SERVICING ..................................................................... 26
CHECKING VOLTAGE ............................................... 26
CHECKING WIRING .................................................. 26
COMFORTBRIDGE™ TECHNOLOGY AIR
HANDLER (B*) ............................................................ 26
CHECKING TRANSFORMER AND
CONTROL CIRCUIT .................................................... 32
CHECKING TIME DELAY RELAY .............................. 32
CHECKING UNITARY (UC) CONTROL
COMPRESSOR ........................................................... 32
CHECKING HIGH AND LOW VOLTAGE TO
ECM MOTOR .............................................................. 33
COPELAND COMFORT ALERT™ - UNITARY (UC)
CONTROL DIAGNOSTICS APPLIES TO ASXC, ASZC,
AND DSZC 2-STAGE MODELS ................................ 34
CHECKING HIGH PRESSURE CONTROL ............... 34
CHECKING LOW PRESSURE CONTROL ................ 34
CHECKING HIGH AND LOW PRESSURE SWITCH
VOLTAGE .................................................................... 35
CHECKING CAPACITOR ............................................ 35
RESISTANCE CHECK USING A DIGITAL
MULTI-METER ............................................................ 35
CAPACITANCE CHECK USING A DIGITAL
MULTI-METER (IN CAPACITANCE MODE) ............... 35
TESTING A RUN CAPACITOR UNDER LOAD ........... 36
CHECKING EMERSON ULTRATECH™
ECM MOTORS ............................................................ 36
CHECKING COMPRESSOR ....................................... 39
RESISTANCE TEST .................................................. 39
GROUND TEST .......................................................... 40
For service information related to the Bluetooth® Shared
Data Loader BTSDL01 referenced in this manual, please
refer to the installation instructions for the BTSDL01 at
www.coolcloudhvac.com/loaderuserguide.
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