Goodman ComfortNet GSZC16036 User Manual

RS6200007r14
December 2017
This manual is to be used by qualified, professionally trained HVAC technicians only. Goodman
does not assume any responsibility for property damage or personal injury due to improper
service procedures or services performed by an unqualified person.
Copyright © 2015-2017 Goodman Manufacturing Company, L.P.
ComfortNet™
ASXC, DSXC, and GSXC Condensing Units,
ASZC, DSZC and GSZC
Split System Heat Pumps
with R-410A Refrigerant
Blowers, Coils, & Accessories
Service Instructions
is a registered trademark of Maytag Corporation or its related companies and is used under license to Goodman Company, L.P., Houston, TX. All rights reserved.

Goodman ComfortNet GSZC16036 Specifications

General

Cooling Capacity (BTU)	36, 000
Heating Capacity (BTU)	36, 000
SEER Rating	16
HSPF Rating	9
Refrigerant	R-410A
Compressor Type	Two-Stage
Stages	2
Voltage (V)	208/230
Phase	1

Summary

Service Instructions

IMPORTANT INFORMATION

SAFE REFRIGERANT HANDLING

PRODUCT IDENTIFICATION

PRODUCT DESIGN

SYSTEM OPERATION

DEFROST CYCLE - COMFORTNETTM MODELS

Explains the defrost cycle control mechanism for ComfortNet models.

TROUBLESHOOTING CHART

SERVICING

S-1 CHECKING VOLTAGE

Procedure for measuring system voltage and locked rotor voltage.

COMFORTNET™ SYSTEM ADVANCED FEATURES

Network Troubleshooting

Troubleshooting the ComfortNet system network using on-board tools.

ComfortNet ™ Thermostat Only Symptoms of Abnormal Operation (Communicating & Non-communicating Thermostat)

PCBJA104 AIR HANDLER DIAGNOSTIC CODES

Table detailing diagnostic codes for PCBJA104 air handler controls.

ECM MOTOR

S-12 CHECKING HIGH PRESSURE CONTROL

Emerson UltraCheck-EZTM Diagnostic Tool

Electrical Checks - Low Voltage Control Circuits

S-17 CHECKING COMPRESSOR

Safety warnings and procedures for checking hermetic compressors.

S-17C UNLOADER TEST PROCEDURE

Method to verify the operation of the unloader test procedure.

S-17D OPERATION TEST

S-26 TESTING TEMPERATURE SENSORS (COMFORTNET READY MODELS ONLY)

Procedure for testing outdoor and indoor coil temperature sensors.

Troubleshooting Motor Control Circuits

Guidance on troubleshooting motor control circuits using system tools.

Checking Bias Voltage:

1.0 Cooling Operation - Low and High Stage Cool

2.0 Heating Operation -> Outdoor Temperature Above the Heat Pump Balance Point

S-61B CHECKING HEATER FUSE LINK (OPTIONAL ELECTRIC HEATERS)

S-101 LEAK TESTING (NITROGEN OR NITRO-GEN-TRACED)

Methods for leak testing refrigeration systems using nitrogen.

EXPANSION VALVE SYSTEM

Guidelines for charging units with non-adjustable TXVs.

S-104 CHECKING COMPRESSOR EFFICIENCY

Procedure to diagnose compressor inefficiency by checking scroll flanks.

S-110 CHECKING EXPANSION VALVE OPERATION

CHECKING COMPRESSOR EFFICIENCY

Procedure to diagnose compressor inefficiency by checking scroll flanks.

Diagnostics

S-4 CHECKING TRANSFORMER AND CONTROL CIRCUIT

PCBJA101- PCBJA102 AIR HANDLER DIAGNOSTIC CODES

Table detailing diagnostic codes for PCBJA101/102 air handler controls.

S-8A CHECKING UNITARY (UC) CONTROL COMPRESSOR CONTACTOR/RELAY CONTACTS

S-16G CHECKING EMERSON ULTRATECHTM ECM MOTORS

Electrical Checks - High Voltage Power Circuits

Motor Control/End Bell Checks

S-16H ECM CFM ADJUSTMENTS AVPTC/MBVC

Guide for adjusting ECM blower CFM using dipswitches on AVPTC/MBVC models.

S-17A RESISTANCE TEST

Procedure for testing compressor winding resistance.

S-40A AVPTC/MBVC ELECTRONIC BLOWER/HEATER CONTROL

Details the electronic control for AVPTC/MBVC blowers and heaters.

SEQUENCE OF OPERATION AVPTC/MBVC with ASXC/DSXC Condenser and CTK0* Communicating Themostat

Describes the sequence of operation for systems with these components.

2.0 Heating Operation - Auxiliary/Emergency Heat

Outdoor Temperature Below the Heat Pump Balance Point

S-61A CHECKING HEATER LIMIT CONTROL(S)

Procedure for checking heater limit controls for proper function.

S-62 CHECKING HEATER ELEMENTS

S-102 EVACUATION

Procedure for evacuating the system to remove air and moisture.

Units Equipped with Adjustable Expansion Valves should be charged by Subcooling and Superheat adjusted only if necessary.

Procedures for charging units with adjustable TXVs using subcooling and superheat.

S-106 OVERFEEDING

S-112 CHECKING RESTRICTED LIQUID LINE

S-115 COMPRESSOR BURNOUT

Steps to diagnose and handle a compressor burnout situation.

Air Handler Static Pressure Readings

S-3E CTK0*** COMFORTNETTM THERMOSTAT

S-17B GROUND TEST

Procedure for testing compressor windings for ground faults.

S-21 CHECKING REVERSING VALVE AND SOLENOID

Steps to check the reversing valve for proper operation and position.

Data Line Voltage Troubleshooting and Bias Switches

Troubleshooting data line voltage and bias switch settings for communication.

S-100 REFRIGERATION REPAIR PRACTICE

General practices for refrigeration system repair, including brazing.

S-103 CHARGING

Steps for charging the system with the correct refrigerant amount.

S-107 UNDERFEEDING

S-113 OVERCHARGE OF REFRIGERANT

Suction Line Drier Clean-Up Method

S-203 SINGLE PIECE AIR HANDLER EXTERNAL STATIC PRESSURE

S-10A COPELAND COMFORT ALERTTM - UNITARY (UC) CONTROL DIAGNOSTICS

Overview of Copeland Comfort Alert diagnostics integrated into the UC control.

S-24 TESTING DEFROST CONTROL

Procedure for testing the defrost control unit.

4.0 Defrost Operation

Explains the defrost cycle operation and its control.

S-108 SUPERHEAT

S-114 NON-CONDENSABLES

S-203A TWO PIECE AIR HANDLER EXTERNAL STATIC PRESSURE