Service and Troubleshooting
AVZC18 Inverter Heat Pump Condenser Units with R-410A Refrigerant
Blowers, Coils, & Accessories
Copyright © 2021 Goodman Manufacturing Company, L.P.
RS6215003r1
July 2021
®
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 IDENTIFICATION ........................................ 4
SYSTEM OPERATION ................................................... 5
SERVICING .................................................................... 9
CHECKING VOLTAGE ................................................. 9
CHECKING WIRING ..................................................... 9
CHECKING THERMOSTAT, WIRING .......................... 9
THERMOSTAT AND WIRING ....................................... 9
CHECKING TRANSFORMER AND CONTROL
CIRCUIT ......................................................................... 9
CHECKING HIGH PRESSURE SWITCH .................. 10
CHECKING INDOOR AND OUTDOOR HI/LOW
PRESSURE SENSOR................................................. 10
CHECKING COMPRESSOR ...................................... 10
COMPRESSOR WINDING INSULATION TEST ....... 11
GROUND TEST ........................................................... 11
TESTING TEMPERATURE SENSORS AND EEV
COIL RESISTANCE..................................................... 12
TESTING EEV COIL RESISTANCE .......................... 12
TESTING REVERSING VALVE .................................. 12
AVPEC* HEATER CONTROL ..................................... 13
NETWORK TROUBLESHOOTING ............................ 13
REFRIGERATION REPAIR PRACTICE .................... 14
NITROGEN-TRACED) ................................................ 14
STANDING PRESSURE TEST (RECOMMENDED) . 15
EVACUATION .............................................................. 15
CHARGING .................................................................. 16
FINAL CHARGE ADJUSTMENT ................................ 16
CHECKING COMPRESSOR EFFICIENCY .............. 16
CHECKING SUBCOOLING ........................................ 17
NON-CONDENSABLES .............................................. 17
COMPRESSOR BURNOUT ....................................... 18
REFRIGERANT PIPING ............................................. 18
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 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 appropriate service
manual.
REVIEW ALL SERVICE INFORMATION IN THE
APPROPRIATE SERVICE MANUAL BEFORE
BEGINNING REPAIRS.
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
ONLY PERSONNEL THAT HAVE BEEN TRAINED TO INSTALL,
ADJUST, SERVICE OR REPAIR(HEREINAFTER, “SERVICE”)
THE EQUIPMENT SPECIFIED IN THIS MANUAL SHOULD
SERVICE THE EQUIPMENT. THE MANUFACTURER WILL
NOT BE RESPONSIBLE FOR ANY INJURY OR PROPERTY
DAMAGE ARISING FROM IMPROPER SERVICE OR SERVICE
PROCEDURES. IF YOU SERVICE THIS UNIT, YOU ASSUME
RESPONSIBILITY FOR ANY INJURY OR PROPERTY DAMAGE
WHICH MAY RESULT. IN ADDITION, IN JURISDICTIONS THAT
REQUIRE ONE OR MORE LICENSES TO SERVICE THE EQUIP-
MENT SPECIFIED IN THIS MANUAL, ONLY LICENSED PER-
SONNEL SHOULD SERVICE THE EQUIPMENT. IMPROPER IN-
STALLATION, ADJUSTMENT, SERVICING OR REPAIR OF THE
EQUIPMENT SPECIFIED IN THIS MANUAL, OR ATTEMPTING
TO INSTALL, ADJUST, SERVICE OR REPAIR THE EQUIPMENT
SPECIFIED IN THIS MANUAL WITHOUT PROPER TRAINING
MAY RESULT IN PRODUCT DAMAGE, PROPERTY DAMAGE,
PERSONAL INJURY OR DEATH.
WARNING
