Carrier 48AJ Operating And Service Manual page 87

ALARM OR
ALERT
NUMBER
A051 Circuit A, Compressor 1 Stuck On Failure
P051 Circuit A, Compressor 1 Failure
T051 Circuit A, Compressor 1 Failure
A052 Circuit A, Compressor 2 Stuck On Failure
P052 Circuit A, Compressor 2 Failure
T052 Circuit A, Compressor 2 Failure
A055 Circuit B, Compressor 1 Stuck On Failure
P055 Circuit B, Compressor 1 Failure
T055 Circuit B, Compressor 1 Failure
A056 Circuit B, Compressor 2 Stuck On Failure
P056 Circuit B, Compressor 2 Failure
T056 Circuit B, Compressor 2 Failure
T064 Circuit A Saturated Condensing Thermistor Failure
T065 Circuit B Saturated Condensing Thermistor Failure
T072 Evaporator Discharge Reset Sensor Failure
T073 Outside Air Temperature Thermistor Failure
T074 Space Temperature Thermistor Failure
T075 Return Air Thermistor Failure
T076 Outside Air Relative Humidity Sensor Failure
T078 Return Air Relative Humidity Sensor Failure
T082 Space Temperature Offset Sensor Failure
T090 Circuit A Discharge Pressure Transducer Failure
T091 Circuit B Discharge Pressure Transducer Failure
T092 Circuit A Suction Pressure Transducer Failure
T093 Circuit B Suction Pressure Transducer Failure
T110 Circuit A Loss of Charge
T111 Circuit B Loss of Charge
A120 Circuit A Low Saturated Suction Temperature Alarm.
P120 Circuit A Low Saturated Suction Temp-Comp A2 Shutdown
T120 Circuit A Low Saturated Suction Temperature Alert.
A121 Circuit B Low Saturated Suction Temperature Alarm.
P121 Circuit B Low Saturated Suction Temp-Comp B2 Shutdown
T121 Circuit B Low Saturated Suction Temperature Alert.
T122 Circuit A High Saturated Suction Temperature
T123 Circuit B High Saturated Suction Temperature
T126 Circuit A High Head Pressure
T127 Circuit B High Head Pressure
A140 Reverse Rotation Detected
A150 Unit is in Emergency Stop
T153 Real Time Clock Hardware Failure
A154 Serial EEPROM Hardware Failure
T155 Serial EEPROM Storage Failure Error
A156 Critical Serial EEPROM Storage Failure Error
A157 A/D Hardware Failure
A171 Staged Gas Control Board Comm Failure
A172 Controls Expansion Module Comm Failure
A173 ECB1 Board Communication Failure
A174 ECB2 Board Communication Failure
T177 4-20 MA Demand Limit Failure
T178 4-20 MA Static Pressure Reset/VFD Fail
A200 Linkage Timeout Error - Communication Failure
T210 Building Pressure Transducer Failure
T211 Static Pressure Transducer Failure
T220 Indoor Air Quality Sensor Failure
T221 Outdoor Air Quality Sensor Failure
T229 Economizer Minimum Position Override Input Failure
LEGEND
A — Alarm
P — Pre-Alert
T — Alert
Table 105 — Alert and Alarm Codes
DESCRIPTION ACTION TAKEN BY CONTROL
Turn off all compressors
Add strike to Compressor
Compressor locked off
Turn off all compressors
Add strike to Compressor
Compressor locked off
Turn off all compressors
Add strike to Compressor
Compressor locked off
Turn off all compressors
Add strike to Compressor
Compressor locked off
Use OAT for head pressure control
Use OAT for head pressure control
Unit Shutdown
Stop use of economizer
Unit Shutdown
Continue to run unit
Use OAT changeover control
Use differential drybulb changeover
Use Space temperature without offset
Stop circuit
Stop circuit
Stop circuit
Stop circuit
Stop circuit
Stop circuit
Stop circuit
Compressor A2 Shutdown
Stop circuit
Stop circuit
Compressor B2 Shutdown
Stop circuit
Stop circuit
Stop circuit
Stop circuit
Stop circuit
Stop unit
Stop unit
Stop unit
Stop unit
Stop unit
Stop unit
Stop unit
Stop gas heat
Stop options on CEM
Stop economizer & power exh
Stop unit
Stop demand limiting
Stop static pressure reset/VFD
Stop unit
Close economizer, stop exhaust
Stop unit
Stop IAQ control
Use a default value for IAQ
Use software configured
minimum
87
RESET
PROBABLE CAUSE
METHOD
Manual Welded Contact
Automatic High pressure switch, compressor
(max 3) current, wiring error
Manual Exceeded 3 strike limit
Manual Welded Contact
Automatic High pressure switch, compressor
(max 3) current, wiring error
Manual Exceeded 3 strike limit
Manual Welded Contact
Automatic High pressure switch, compressor
(max 3) current, wiring error
Manual Exceeded 3 strike limit
Manual Welded Contact
Automatic High pressure switch, compressor
(max 3) current, wiring error
Manual Exceeded 3 strike limit
Automatic Faulty thermistor or wiring error
Automatic Faulty thermistor or wiring error
Automatic Faulty remote input on CEM board
Automatic Faulty thermistor or wiring error
Automatic Faulty thermistor or wiring error
Automatic Faulty thermistor or wiring error
Automatic Faulty sensor or wiring error
Automatic Faulty sensor or wiring error
Automatic Faulty sensor or wiring error
Automatic Faulty sensor, wiring error
Automatic Faulty sensor, wiring error
Automatic Faulty sensor, wiring error
Automatic Faulty sensor, wiring error
Manual Low refrigerant charge
Manual Low refrigerant charge
Low refrigerant charge, low airflow,
Manual dirty coil, broken fan belt, TXV
problem
Low refrigerant charge, low airflow,
Automatic dirty coil, broken fan belt, TXV
problem
Low refrigerant charge, low airflow,
Automatic dirty coil, broken fan belt, TXV
problem
Low refrigerant charge, low airflow,
Manual dirty coil, broken fan belt, TXV
problem
Low refrigerant charge, low airflow,
Automatic dirty coil, broken fan belt, TXV
problem
Low refrigerant charge, low airflow,
Automatic dirty coil, broken fan belt, TXV
problem
Manual TXV problem
Manual TXV problem
Dirty condenser, condenser fan
Automatic
failure
Dirty condenser, condenser fan
Automatic
failure
Manual Incorrect Compressor Wiring
Manual External shutdown command
Manual Control Board failure, check lights
Manual Control Board failure, check lights
Manual Control Board failure, check lights
Manual Control Board failure, check lights
Manual Control Board failure, check lights
Automatic Control Board failure, check lights
Automatic Control Board failure, check lights
Automatic Control Board failure, check lights
Automatic Control Board failure, check lights
Automatic Input failure, wiring error
Automatic Input Failure, wiring error
Manual Wiring errors, board failures
Automatic Sensor failure, wiring error
Automatic Sensor failure, wiring error
Automatic Sensor failure, wiring error
Automatic Sensor failure, wiring error
Automatic Input failure, wiring error