Carrier AquaSnap 30MPA Series - Alarm and Alert Codes

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