Carrier 38APS025 User Manual

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53380010-01 Printed in U.S.A. Form 38AP-2T Pg 1 815 1-15 Replaces: 38AP-1T
Controls, Start-Up, Operation,
Service, and Troubleshooting
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . 2,3
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Conventions Used in This Manual . . . . . . . . . . . . . . . . . . .3
CONTROLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-40
General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Display Module Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
• SCROLLING MARQUEE DISPLAY
• ACCESSORY NAVIGATOR™ DISPLAY MODULE
Changing the Display Language. . . . . . . . . . . . . . . . . . . .22
Changing the Units of Measure. . . . . . . . . . . . . . . . . . . . .22
Configuration and Service Password . . . . . . . . . . . . . . .22
Carrier Comfort Network
®
(CCN) Interface . . . . . . . . . .22
ComfortLink Control Boards. . . . . . . . . . . . . . . . . . . . . . . .23
• CONTROL MODULE COMMUNICATION
• MAIN BASE BOARD (MBB)
• AUX BOARD
• COMPRESSOR EXPANSION MODULE (CXB)
• ENERGY MANAGEMENT MODULE (EMM)
Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
• CURRENT SENSOR BOARD (CSB)
• ENABLE/OFF/REMOTE CONTACT SWITCH
• EMERGENCY ON/OFF SWITCH
• FAN STATUS SWITCH (FS1, FS2)
• HIGH PRESSURE SWITCH (HPS)
• PRESSURE TRANSDUCERS
• THERMISTORS
• THERMOSTAT INPUT
Sensor Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
• ALARM RELAY
• LIQUID LINE SOLENOID VALVES
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Evacuation and Dehydration. . . . . . . . . . . . . . . . . . . . . . . .40
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41-59
Preliminary Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Adjust Refrigerant Charge. . . . . . . . . . . . . . . . . . . . . . . . . .41
Check Compressor Oil Level . . . . . . . . . . . . . . . . . . . . . . .57
Adjust Oil Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59-136
Time, Day, and Date. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
• TIME/DATE BROADCAST
• DAYLIGHT SAVINGS TIME
Control Methods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
• ENABLE-OFF-REMOTE CONTROL
• OCCUPANCY SCHEDULE
• CCN CONTROL
Capacity Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
• C.TYP = 1 (VAV)
• C.TYP = 3 (TSTAT MULTI)
• C.TYP = 4 (TSTAT 2STG)
• C.TYP = 5 (SPT MULTI)
• C.TYP = 7 (PCT CAP)
Page
• C.TYP = 8 (DUAL TSTAT)
• C.TYP = 9 (VAV SETPOINT)
• CAPACITY CONTROL ALGORITHMS
Field Configurable Controls . . . . . . . . . . . . . . . . . . . . . . . 111
• ALARM ROUTING
• COMPRESSOR STAGING
• DEADBAND MULTIPLIER
• DEMAND LIMIT
• DIGITAL COMPRESSOR
• HEAD PRESSURE CONTROL
• LOW AMBIENT LOCKOUT
• MAINTENANCE REMINDER
• MINIMUM LOAD CONTROL
• MINUTES OFF TIME
• RAMP LOADING
• TEMPERATURE RESET
Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136-160
Service Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Compressors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
• ENABLING AND DISABLING COMPRESSORS
• COMPRESSOR MOTOR PROTECTION
• MOTOR OVERLOAD PROTECTION
• COMPRESSOR FUNCTIONAL CHECK
• COMPRESSOR REPLACEMENT
• CRANKCASE HEATER MOUNTING
• CRANKCASE HEATER WIRING
• OIL CHARGE
• COMPRESSOR AND OIL EQUALIZER LINE SIGHT
GLASSES
Control Module Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
• LOSS OF COMMUNICATION
• CONTROL MODULE REPLACEMENT
Condenser Fan Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
• CONDENSER FAN MOTOR PROTECTION
Condenser Fans. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
• METAL (VALUE SOUND) FANS
• AEROACOUSTIC™ (LOW SOUND) FANS
Filter Drier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
High Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
• REPLACING SWITCH
Moisture/Liquid Indicator. . . . . . . . . . . . . . . . . . . . . . . . . . 152
Motormaster
®
V Controls . . . . . . . . . . . . . . . . . . . . . . . . . 152
• TROUBLESHOOTING
Pressure Transducers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
• TROUBLESHOOTING
• REPLACING TRANSDUCER
Temperature Relief Devices . . . . . . . . . . . . . . . . . . . . . . . 155
Thermistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
• TROUBLESHOOTING
• REPLACING THERMISTORS
Gemini™ Select
38APS025-065,38APD025-130
Commercial Air-Cooled Condensing Units
with ComfortLink Version 6.X Controls
50/60 Hz

Carrier 38APS025 Specifications

General

Brand	Carrier
Model	38APS025
Category	Air Conditioner
Language	English