Alarm And Alert Codes - Carrier Air Conditioner Operation And Service Manual

ALARM/ ALARM
ALERT OR DESCRIPTION
CODE ALERT
T051 Alert Circuit A, Compressor 1
Failure
T052 Alert Circuit A, Compressor 2
Failure
T053 Alert Circuit A, Compressor 3
Failure
T054 Alert Circuit A, Compressor 4
Failure
T055 Alert Circuit B, Compressor 1
Failure
T056 Alert Circuit B, Compressor 2
Failure
T057 Alert Circuit B, Compressor 3
Failure
A060 Alarm Cooler Leaving Fluid
Thermistor Failure (T1)
A061 Alarm Cooler Entering Fluid
Thermistor Failure (T2)
T064 Alert Circuit A Saturated Con-
densing Thermistor Failure
(T3)
T065 Alert Circuit B Saturated Con-
densing Thermistor Failure
(T4)
T066 Alert Circuit A Saturated Suction
Thermistor Failure (T5)
T067 Alert Circuit B Saturated Suction
Thermistor Failure (T6)
T068 Alert Compressor A1 Suction
Gas Thermistor Failure (T7)
T069 Alert Compressor B1 Suction
Gas Thermistor Failure (T8)
T073 Alert Outside Air Thermistor
Failure (T9)
T074 Alert Space Temperature
Thermistor Failure (T10)
T077 Alert Circuit A Saturated
Suction Temperature
exceeds Cooler Leaving
Fluid Temperature
T078 Alert Circuit B Saturated
Suction Temperature
exceeds Cooler Leaving
Fluid Temperature
T079 Alert Lead/Lag Thermistor Failure
Table 29 — Alarm and Alert Codes
WHY WAS THIS
ALARM
GENERATED?
Compressor feedback signal Circuit A shut down.
does not match relay state
Compressor feedback signal Circuit A shut down. Circuit
does not match relay state restarted in 1 minute. Com-
pressor A2 not used until
alarm is reset.
Compressor feedback signal Circuit A shut down. Circuit
does not match relay state restarted in 1 minute. Com-
pressor A3 not used until
alarm is reset.
Compressor feedback signal Circuit A shut down. Circuit
does not match relay state restarted in 1 minute. Com-
pressor A4 not used until
alarm is reset.
Compressor feedback signal Circuit B shut down.
does not match relay state
Compressor feedback signal Circuit B shut down. Circuit
does not match relay state restarted in 1 minute. Com-
pressor B2 not used until
alarm is reset.
Compressor feedback signal Circuit B shut down. Circuit
does not match relay state restarted in 1 minute. Com-
pressor B3 not used until
alarm is reset.
Thermistor outside range of Chiller shutdown after
–40 to 245 F (–40 to 118 C) pumpdown complete.
Thermistor outside range of Chiller shutdown after
–40 to 245 F (–40 to 118 C) pumpdown complete.
Thermistor outside range of Circuit A shutdown after
–40 to 245 F (–40 to 118 C) pumpdown complete.
Thermistor outside range of Circuit B shutdown after
–40 to 245 F (–40 to 118 C) pumpdown complete.
Thermistor outside range of Circuit A shutdown after
–40 to 245 F (–40 to 118 C) pumpdown complete.
(EXV only)
Thermistor outside range of Circuit B shutdown after
–40 to 245 F (–40 to 118 C) pumpdown complete.
(EXV only).
Thermistor outside range of Circuit A shutdown after
–40 to 245 F (–40 to 118 C) pumpdown complete.
(EXV only).
Thermistor outside range of Circuit B shutdown after
–40 to 245 F (–40 to 118 C) pumpdown complete.
(EXV only).
Thermistor outside range of Temperature reset disabled.
–40 to 245 F (–40 to 118 C) Chiller runs under normal
control/set points.
Thermistor outside range of Temperature reset disabled.
–40 to 245 F (–40 to 118 C) Chiller runs under normal
control/set points.
Saturated suction is Circuit A shutdown after
greater than leaving fluid pumpdown complete.
temperature for more than
5 minutes
Saturated suction is Circuit B shutdown after
greater than leaving fluid pumpdown complete
temperature for more than
5 minutes
Thermistor outside range of Lead/lag algorithm runs
–40 to 245 F (–40 to 118 C) using Master LWT sensor
Master is lead chiller.
49
ACTION TAKEN RESET
BY CONTROL METHOD
Manual
Manual
Manual
Manual
Manual
Manual
Manual
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
PROBABLE
CAUSE
High-pressure or loss-of-
charge switch open, faulty
control relay or CPCS board,
loss of condenser air, liquid
valve closed, operation
beyond capability.
High-pressure switch open,
faulty control relay or CPCS
board, loss of condenser air,
liquid valve closed, opera-
tion beyond capability.
High-pressure switch open,
faulty control relay or CPCS
board, loss of condenser air,
liquid valve closed, opera-
tion beyond capability.
High-pressure switch open,
faulty control relay or CPCS
board, loss of condenser air,
liquid valve closed, opera-
tion beyond capability.
High-pressure or loss-of-
charge switch open, faulty
control relay or CPCS board,
loss of condenser air, liquid
valve closed, operation
beyond capability.
High-pressure switch open,
faulty control relay or CPCS
board, loss of condenser air,
liquid valve closed, opera-
tion beyond capability.
High-pressure switch open,
faulty control relay or CPCS
board, loss of condenser air,
liquid valve closed, opera-
tion beyond capability.
Thermistor failure, damaged
cable/wire or wiring error.
Thermistor failure, damaged
cable/wire or wiring error.
Thermistor failure, damaged
cable/wire or wiring error.
Thermistor failure, damaged
cable/wire or wiring error.
Thermistor failure, damaged
cable/wire or wiring error.
Thermistor failure, damaged
cable/wire or wiring error.
Thermistor failure, damaged
cable/wire or wiring error.
Thermistor failure, damaged
cable/wire or wiring error.
Thermistor failure, damaged
cable/wire or wiring error.
Thermistor failure, damaged
cable/wire or wiring error.
Faulty expansion valve or
EXV board, faulty cooler suc-
tion thermistor (T5) or leav-
ing fluid thermistor (T1).
Faulty expansion valve or
EXV board, faulty cooler suc-
tion thermistor (T6) or leav-
ing fluid thermistor (T1).
Dual chiller LWT thermistor
failure, damaged cable/wire
or wiring error.