Alarm And Alert Codes - Carrier AquaSnap 30MPA Series Controls, Start-Up, Operation, Service, And Troubleshooting

ALARM/ ALARM
ALERT OR DESCRIPTION
CODE ALERT
Circuit A Compressor
A048 Alarm
Availability Alarm
Circuit A, Compressor 1
T051 Alert
Failure
Circuit A, Compressor 1
A051 Alarm
Stuck on Failure
Circuit A, Compressor 2
T052 Alert
Failure
Circuit A, Compressor 2
A052 Alarm
Stuck on Failure
Circuit A, Compressor 3
T053 Alert
Failure
Circuit A, Compressor 3
A053 Alarm
Stuck on Failure
Cooler Leaving Fluid
A060 Alarm
Thermistor Failure
Cooler Entering Fluid
A061 Alarm
Thermistor Failure
T062 Alert Condenser Leaving Fluid
Thermistor Failure
T063 Alert Condenser Entering Fluid
Thermistor Failure
Circuit A Return Gas
T068 None
Thermistor Failure
Outside Air Thermistor
T073 Alert
Failure
Space Temperature/Dual Chiller
T074 Alert
Thermistor Failure
Circuit A Saturated
Suction Temperature
A077 Alarm
exceeds Cooler Leaving
Fluid Temperature
Lead/Lag LWT
T079 Alert
Thermistor Failure
Circuit A Discharge
A090 Alarm
Pressure Transducer Failure
Circuit A Suction
A092 Alarm
Pressure Transducer Failure
Discharge Gas
T094 Alert
Thermistor Failure
A110 Alarm Circuit A Loss of Charge
Circuit A High Saturated
A112 Alarm
Suction Temperature
Circuit A Low Suction
A114 Alarm
Superheat
See legend on page 63.
Table 54 — Alarm and Alert Codes
WHY WAS THIS
ALARM
GENERATED?
Two compressors on circuit
Circuit shut down
failed
Compressor feedback signal Compressor A1 shut
does not match relay state down.
Respective current sensor All compressor outputs
board (CSB) feedback signal de-energized. 30MPA
is ON when the compressor head pressure routine
should be off remains active.
Compressor feedback signal Compressor A2 shut
does not match relay state down.
Respective current sensor All compressor outputs
board (CSB) feedback signal
de-energized. 30MPA
is ON when the compressor head pressure routine
should be off remains active.
Compressor feedback signal Compressor A3 shut
does not match relay state down.
Respective current sensor All compressor outputs
board (CSB) feedback signal de-energized. 30MPA
is ON when the compressor head pressure routine
should be off remains active.
Thermistor outside range of Chiller shut down
–40 to 245 F (–40 to 118 C) immediately
Thermistor outside range of Chiller shut down
–40 to 245 F (–40 to 118 C) immediately
Thermistor outside range of Alert only.
–40 to 245 F (–40 to 118 C) No action taken.
Thermistor outside range of Alert only.
–40 to 245 F (–40 to 118 C) No action taken.
If return gas sensors are
enabled (RG.EN) and
Circuit A shut down
thermistor is outside range of
–40 to 245 F (–40 to 118 C)
Temperature reset
Thermistor outside range of
disabled. Chiller runs
–40 to 245 F (–40 to 118 C)
under normal control/set
(if enabled)
points.
Temperature reset
Thermistor outside range of
disabled. Chiller runs
–40 to 245 F (–40 to 118 C)
under normal control/set
(if enabled)
points.
Faulty expansion valve,
suction pressure transducer Circuit A shut down.
or leaving fluid thermistor.
Thermistor outside range of Chiller runs as a stand
–40 to 245 F (–40 to 118 C) alone machine
Outside of range (0 to 667
Circuit A shut down
psig)
Outside of range (0 to 420
Circuit A shut down
psig)
Discharge thermistor (DTT) is
either open or shorted outside Digital compressor shut
of range –39.9 to 356 F (–39.9 down.
to 180 C)
If the compressors are off
and discharge pressure Circuit not allowed to
reading is < 26 psig for start.
30 sec.
Circuit saturated suction
temperature pressure
Circuit shut down
transducer > 70 F (21.1 C)
for 5 minutes
Suction superheat is
less than 5° F (2.8 C) for 5 Circuit A shut down.
minutes. (if RGT installed)
60
ACTION TAKEN RESET
BY CONTROL METHOD
Manual
Manual
Manual
Manual
Manual
Manual
Manual
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Manual
Automatic
Automatic
Automatic
Automatic
Manual
Manual
Automatic restart
after first daily
occurrence.
Manual restart
thereafter.
PROBABLE
CAUSE
See applicable compressor
alarm.
High-pressure switch open,
faulty CSB, loss of condenser
flow, filter drier plugged, non-
condensables, operation
beyond capability, motor pro-
tection module open.
Welded contactor, welded
control relay on MBB, wiring
error, faulty CSB.
High-pressure switch open,
faulty CSB, loss of condenser
flow, filter drier plugged, non-
condensables, operation
beyond capability, motor pro-
tection module open.
Welded contactor, welded
control relay on MBB, wiring
error, faulty CSB.
High-pressure switch open,
faulty CSB, loss of condenser
flow, filter drier plugged, non-
condensables, operation
beyond capability, motor pro-
tection module open.
Welded contactor, welded
control relay on MBB, wiring
error, faulty CSB.
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
suction pressure transducer
or leaving fluid thermistor.
Dual LWT thermistor failure,
damaged cable/wire or
wiring error.
Transducer failure, poor
connection to MBB, or wiring
damage/error.
Transducer failure, poor
connection to MBB, or wiring
damage/error.
Thermistor failure, damaged
cable/wire or wiring error.
Refrigerant leak or
transducer failure
Faulty expansion valve,
faulty suction pressure
transducer or high entering
fluid temperature.
Faulty expansion valve,
faulty suction pressure
transducer, faulty suction gas
thermistor, circuit
overcharged