Carrier 48PG03-16 Controls, Start-Up, Operation, Service And Troubleshooting Instructions page 78

ALARM
OR
DESCRIPTION
ALERT
NUMBER
Compressor A1 Safety Trip
T051 T051
Compressor A1 Current Detected After
Turnoff
Compressor A2 Safety Trip
T052 T052
Compressor A2 Current Detect After
Turnoff
Compressor B1 Safety Trip
T055 T055
Compressor B1 Current Detected After
Turnoff
T059 Compressor C1 Safety Trip
Compressor C1 Current Detected After
Turnoff
Circuit A Saturated Condensing Temp
T064
Thermistor Failure
Circuit B Saturated Condensing Temp
T065
Thermistor Failure
Outdoor Air Temperature Thermistor
T073
Failure
T074 Space Temperature Thermistor Failure
Supply Air Temperature Thermistor
T075
Failure
Return Air Thermistor Failure
T076
Space Relative Humidity Sensor Failure
T077
T080 Circuit C Saturated Condensing Temp
Thermistor Failure
Circuit A Suction Pressure Transducer
T092
Failure
Circuit B Suction Pressure Transducer
T093
Failure
T101 Circuit C Suction Pressure Transducer
Failure
Compressor A1 Current Sensor Failure
T102 T102
Compressor A2 Current Sensor Failure
Compressor B1 Current Sensor Failure
T103
T104 Compressor C1 Current Sensor Failure
T110 Circuit A Loss of Charge
Circuit B Loss of Charge
T111
Circuit A High Refrigerant Pressure
T126
Circuit B High Refrigerant Pressure
T127
Circuit A Low Refrigerant Pressure
T133
Circuit B Low Refrigerant Pressure
T134
T140
Circuit C Loss of Charge
T141 Circuit C Low Refrigerant Pressure
T142 Circuit C High Refrigerant Pressure
LEGEND
ECB --- --- Economizer Control Board
IGC --- --- Integrated Gas Controller
MBB --- --- Main Base Board
OAT --- --- Outdoor ---Air Thermistor
Table 92—ComfortLink™ Alarm Codes
ACTION TAKEN RESET
BY CONTROL METHOD
Add Strike for Circuit A Automatic
Automatic Welded contactor
Turn off all compressors
Add Strike for Circuit A Automatic
Turn off all compressors Automatic Welded contactor
Add Strike for Circuit B Automatic
Automatic Welded contactor
Turn off all compressors
Add Strike for Circuit C Automatic High-pressure switch open. Compressor internal protec-
Turn off all compressors Automatic Welded contactor
Use OAT to control Outdoor
Automatic
fans
Use OAT to control Outdoor
Automatic
fans
No cooling with economizer Automatic
If U.CTL = 3, then no
Automatic
heating or cooling
No cooling with economizer
and No adaptive compressor
Automatic
staging
If RAT.S = Yes, then
Automatic
no return air display
If RH.S = Yes, then no indoor
Automatic Faulty sensor or wiring error
humidity control
Use OAT to control Outdoor Automatic Faulty, shorted, or open thermistor caused by wiring error
fans
Shutdown Circuit A Manual
Shutdown Circuit B Manual
Shutdown Circuit C Manual
If CS.A1 = Enable, then no
Automatic
T051 current alarm
If CS.A2 = Enable, then no
Automatic
T052 current alarm
If CS.B1 = Enable, then no
Automatic
T055 current alarm
If CS.C1 = Enable, then no Automatic Faulty current sensor caused by wiring error or loose
T059 current alarm
Shutdown Circuit A Manual
Shutdown Circuit B Manual
Shutdown Circuit A Automatic
Shutdown Circuit B Automatic
Add Strike for Circuit A Automatic
Add Strike for Circuit B Automatic
Shutdown Circuit C Manual
Add Strike for Circuit C Automatic Low refrigerant charge, dirty filters, evaporator fan turn-
Shutdown Circuit C Automatic An overcharged system, high outdoor ambient tempera-
78
PROBABLE CAUSE
High-pressure switch open. Compressor internal protec-
tion open. Wiring error
High pressure switch open. Compressor internal protec-
tion open.
Wiring error.
High-pressure switch open. Compressor internal protec-
tion open. Wiring error
tion open. Wiring error
Faulty, shorted, or open thermistor caused by wiring error
or loose connection.
Faulty, shorted, or open thermistor caused by wiring error
or loose connection.
Faulty, shorted, or open thermistor caused by wiring error
or loose connection.
Faulty, shorted, or open thermistor caused by wiring error
or loose connection.
Faulty, shorted, or open thermistor caused by wiring error
or loose connection.
Faulty, shorted, or open thermistor caused by wiring error
or loose connection.
or loose connection.
Faulty transducer, faulty 5-V power supply, or loose
connection
Faulty transducer, faulty 5-V power supply, or loose
connection
Faulty transducer, faulty 5-V power supply, or loose
connection
Faulty current sensor caused by wiring error or loose
connection
Faulty current sensor caused by wiring error or loose
connection
Faulty current sensor caused by wiring error or loose
connection
connection
Low refrigerant or faulty suction pressure transducer
Low refrigerant or faulty suction pressure transducer
An overcharged system, high outdoor ambient tempera-
ture coupled with dirty outdoor coil, plugged filter drier, or
a faulty high-pressure switch.
An overcharged system, high outdoor ambient tempera-
ture coupled with dirty outdoor coil, plugged filter drier, or
a faulty high-pressure switch.
Low refrigerant charge, dirty filters, evaporator fan turn-
ing backwards, loose or broken fan belt, plugged filter
drier, faulty transducer, excessively cold return air, or
stuck open economizer when the ambient temperature is
low.
Low refrigerant charge, dirty filters, evaporator fan turn-
ing backwards, loose or broken fan belt, plugged filter
drier, faulty transducer, excessively cold return air, or
stuck open economizer when the ambient temperature is
low.
Low refrigerant or faulty suction pressure transducer
ing backwards, loose or broken fan belt, plugged filter
drier, faulty transducer, excessively cold return air, or
stuck open economizer when the ambient temperature is
low.
ture coupled with dirty outdoor coil, plugged filter drier, or
a faulty high-pressure switch.