2
CONTENTS (cont)
Page
Smoke Control Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . 72
• FIRE SMOKE INPUTS
• AIRFLOW CONTROL DURING THE FIRE/SMOKE
MODES
• RELEVANT ITEMS
Indoor Air Quality Control . . . . . . . . . . . . . . . . . . . . . . . 73
•OPERATION
• SETTING UP THE SYSTEM
• PRE-OCCUPANCY PURGE
• OPTIONAL AIRFLOW STATION
Humidification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
• SETTING UP THE SYSTEM
•OPERATION
• CONFIGURING THE HUMIDIFIER ACTUATOR
Dehumidification and Reheat . . . . . . . . . . . . . . . . . . . . 77
• SETTING UP THE SYSTEM
•OPERATION
Temperature Compensated Start . . . . . . . . . . . . . . . . 78
• SETTING UP THE SYSTEM
• TEMPERATURE COMPENSATED START LOGIC
Carrier Comfort Network® (CCN). . . . . . . . . . . . . . . . . 79
Alert Limit Configuration . . . . . . . . . . . . . . . . . . . . . . . . 80
Sensor Trim Configuration . . . . . . . . . . . . . . . . . . . . . . 81
Discrete Switch Logic Configuration . . . . . . . . . . . . 81
Display Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Remote Control Switch Input . . . . . . . . . . . . . . . . . . . . 83
Hot Gas Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Space Temperature Offset. . . . . . . . . . . . . . . . . . . . . . . 83
TIME CLOCK CONFIGURATION . . . . . . . . . . . . . . 84, 85
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . 85-102
Complete Unit Stoppage . . . . . . . . . . . . . . . . . . . . . . . . 85
Single Circuit Stoppage . . . . . . . . . . . . . . . . . . . . . . . . . 85
Service Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Restart Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Thermistor Troubleshooting . . . . . . . . . . . . . . . . . . . . . 85
Transducer Troubleshooting. . . . . . . . . . . . . . . . . . . . . 86
Forcing Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . 90
Run Status Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
• AUTO VIEW OF RUN STATUS
• ECONOMIZER RUN STATUS
• COOLING INFORMATION
• MODE TRIP HELPER
• CCN/LINKAGE DISPLAY TABLE
• COMPRESSOR RUN HOURS DISPLAY TABLE
• COMPRESSOR STARTS DISPLAY TABLE
• SOFTWARE VERSION NUMBERS DISPLAY TABLE
Alarms and Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
MAJOR SYSTEM COMPONENTS . . . . . . . . . . . 102-124
General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Factory-Installed Components . . . . . . . . . . . . . . . . . 102
Accessory Control Components. . . . . . . . . . . . . . . . 122
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125-132
Service Access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Adjustments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Refrigerant Feed Components. . . . . . . . . . . . . . . . . . 130
Thermostatic Expansion Valve (TXV) . . . . . . . . . . . 130
Refrigeration Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Oil Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Gas System Adjustment (48Z Only). . . . . . . . . . . . . 131
Moisture/Liquid Indicator. . . . . . . . . . . . . . . . . . . . . . . 131
Filter Drier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Liquid Line Service Valve. . . . . . . . . . . . . . . . . . . . . . . 131
Compressor Discharge Service Valve . . . . . . . . . . 131
Compressor Suction Service Valve . . . . . . . . . . . . . 131
Protective Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Relief Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Page
Control Circuit, 115 V. . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Control Circuit, 24 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Gas Heat (48Z Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Compressor Removal . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Compressor Replacement. . . . . . . . . . . . . . . . . . . . . . 132
APPENDIX A — LOCAL DISPLAY TABLES. . 133-141
APPENDIX B — CCN TABLES . . . . . . . . . . . . . . 142-156
APPENDIX C — UNIT STAGING TABLES. . . . 156-159
APPENDIX D — VFD INFORMATION . . . . . . . . 160-168
APPENDIX E — MODE SELECTION
PROCESS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169, 170
INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
CONTROLS SET POINT AND
CONFIGURATION LOG . . . . . . . . . . . . . . . .CL-1 - CL-6
UNIT START-UP CHECKLIST . . . . . . . . . . . . . . . . . .CL-7
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical compo-
nents. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment. Untrained
personnel can perform the basic maintenance functions of
replacing filters. Trained service personnel should perform all
other operations.
When working on air-conditioning equipment, observe pre-
cautions in the literature, tags and labels attached to the unit,
and other safety precautions that may apply. Follow all safety
codes. Wear safety glasses and work gloves. Use quenching
cloth for unbrazing operations. Have fire extinguishers avail-
able for all brazing operations.
WARNING
Before performing service or maintenance operation on
unit turn off and lock off main power switch to unit.
Electrical shock can cause personal injury and death.
Shut off all power to this equipment during installation
and service. The unit may have an internal non-fused
disconnect or a field-installed disconnect.
CAUTION
This unit uses a microprocessor-based electronic control
system. Do not use jumpers or other tools to short out com-
ponents or to bypass or otherwise depart from recom-
mended procedures. Any short-to-ground of the control
board or accompanying wiring may destroy the electronic
modules or electrical components.
WARNING
1. Improper installation, adjustment, alteration, service,
or maintenance can cause property damage, personal
injury, or loss of life. Refer to the User’s Information
Manual provided with this unit for more details.
2. Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
What to do if you smell gas:
1. DO NOT try to light any appliance.
2. DO NOT touch any electrical switch, or use any
phone in your building.
3. IMMEDIATELY call your gas supplier from a neigh-
bor’s phone. Follow the gas supplier’s instructions.
4. If you cannot reach your gas supplier call the fire
department.