Carrier AQUASNAP 30RAP010-150 Controls, Start-Up, Operation, Service, And Troubleshooting page 74

ALARM/ ALARM
ALERT OR DESCRIPTION
CODE ALERT
Circuit B, Compressor 3
Alarm Stuck On
Failure
A057
Circuit B, Compressor 3
Alarm
Chattering Contactor
Cooler Leaving Fluid
A060 Alarm
Thermistor Failure
Cooler Entering Fluid
A061 Alarm
Thermistor Failure
Circuit A Return Gas
T068 Alert
Thermistor Failure
Circuit B Return Gas
T069 Alert
Thermistor Failure
Outside Air Thermistor
T073 Alert
Failure
Space Temperature/Dual
T074 Alert
Chiller Thermistor Failure
Circuit A Saturated
Suction Temperature
T077 Alert
exceeds Cooler Leaving
Fluid Temperature
Circuit B Saturated
Suction Temperature
T078 Alert
exceeds Cooler Leaving
Fluid Temperature
Lead/Lag LWT
T079 Alert
Thermistor Failure
Circuit A Discharge
T090 Alert Pressure Transducer
Failure
Circuit B Discharge
T091 Alert Pressure Transducer
Failure
Circuit A Suction
T092 Alert Pressure Transducer
Failure
Circuit B Suction
T093 Alert Pressure Transducer
Failure
Discharge Gas
T094 Alert
Thermistor Failure
T110 Alert Circuit A Loss of Charge
T111 Alert Circuit B Loss of Charge
Circuit A High Saturated
T112 Alert
Suction Temperature
Circuit B High Saturated
T113 Alert Suction Temperature
Circuit A Low Suction
T114 Alert
Superheat
Circuit B Low Suction
T115 Alert
Superheat
See Legend on page 78.
Table 36 — Alarm and Alert Codes (cont)
WHY WAS THIS
ALARM
GENERATED?
CSB reads ON while the
Compressor B3 shut
compressor relay has been
down
commanded OFF
CSB reads current/no cur-
rent/current/no current Compressor B3 shut
cycling in any 16 second down
window.
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
Return gas thermistor is
outside range of Circuit A shut down
–40 to 245 F (–40 to 118 C)
Return gas thermistor is
outside range of Circuit B shut down
–40 to 245 F –40 to 118 C)
Temperature reset
disabled. Chiller runs
Thermistor outside range of under normal control/set
–40 to 245 F (–40 to 118 C) points. When capacity
reaches 0, cooler/pump
heaters are energized.
Temperature reset
Thermistor outside range of disabled. Chiller runs
–40 to 245 F (–40 to 118 C) under normal control/set
points.
Saturated suction
temperature is greater than
Circuit A shutdown
leaving fluid temperature for
5 minutes.
Saturated suction
temperature is greater than
Circuit B shutdown
leaving fluid temperature for
5 minutes.
Thermistor outside range of Chiller runs as a stand
–40 to 245 F (–40 to 118 C) alone machine
Outside of range (0 to
Circuit A shut down
667 psig)
Outside of range (0 to
Circuit B shut down
667 psig)
Outside of range (0 to
Circuit A shut down
420 psig)
Outside of range (0 to
Circuit B shut down
420 psig)
Size 010,015 chiller shut
Discharge thermistor (DTT)
down. Digital compres-
is either open or shorted
sor shut down.
If the compressors are off
and discharge pressure Circuit not allowed to
reading is < 26 psig for start.
30 sec.
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
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.
Suction superheat is
less than 5° F (2.8 C) for 5 Circuit B shut down.
minutes.
74
ACTION TAKEN RESET
BY CONTROL METHOD
Manual
Manual
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Manual
Manual
Manual
Manual
Automatic restart
after first daily
occurrence.
Manual restart
thereafter.
Automatic restart
after first daily
occurrence.
Manual restart
thereafter.
PROBABLE
CAUSE
Welded compressor contactor,
welded relay output on MBB or
CXB, failed CSB or wiring error.
Refrigerant charge, wiring error,
plugged condenser coil, con-
denser fan motor failure.
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
suction pressure transducer or
leaving fluid thermistor.
Faulty expansion valve or
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.
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
Refrigerant leak or
transducer failure
Faulty Expansion valve,
faulty suction pressure
transducer or high entering
fluid temperature.
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
Faulty expansion valve,
faulty suction pressure
transducer, faulty suction
gas thermistor, circuit
overcharged