Carrier AQUASNAP AIR COOLED CHILLERS WITH COMFORTLINK CONTROLS 30RAP010-060 Operation And Service Manual page 68

ALARM/ ALARM
ALERT OR DESCRIPTION
CODE ALERT
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
Circuit A Low Cooler
T116 Alert
Suction Temperature
Circuit B Low Cooler
T117 Alert
Suction Temperature
High Discharge Gas
T118 Alert
Temperature Alert
High Discharge Gas
A118 Alarm
Temperature
Circuit A High
T126 Alert
Discharge Pressure
Circuit B High
T127 Alert
Discharge Pressure
Circuit A Low Suction
T133 Alert
Pressure
Circuit B Low Suction
T134 Alert
Pressure
Reverse Rotation
A140 Alert
Detected
A150 Alarm Emergency Stop
A151 Alarm Illegal Configuration
Unit Down Due to
A152 Alarm
Failure
Table 42 — Alarm and Alert Codes (cont)
WHY WAS THIS
ALARM
GENERATED?
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.
Mode 7 caused the com-
pressor to unload 6 consecu-
tive times with less than a Circuit shut down
30-minute interval between
each circuit shutdown.
Mode 8 caused the com-
pressor to unload 6 consecu-
tive times with less than a Circuit shut down
30-minute interval between
each circuit shutdown.
Discharge Thermistor (DTT) Compressor A1 shut
reading is greater than 250 F down
3 Discharge Gas Tempera-
Compressor A1 shut
ture alarms occur within a
down
day
Compressor operation out-
Circuit shut down
side of operating envelope.
Compressor operation out-
Circuit shut down
side of operating envelope.
Suction pressure below
34 psig for 8 seconds or Circuit shut down
below 23 psig
Suction pressure below
34 psig for 8 seconds or Circuit shut down
below 23 psig
Incoming chiller power leads Chiller not allowed to
not phased correctly start.
Chiller shutdown
CCN emergency stop
without going through
command received
pumpdown.
One or more illegal Chiller is not allowed to
configurations exists. start.
Both circuits are down due Chiller is unable
to alarms/alerts. to run.
68
ACTION TAKEN RESET
BY CONTROL METHOD
Manual
Manual
Manual
Manual
Automatic restart
after first daily
occurrence.
Manual restart
thereafter.
Automatic restart
after first daily
occurrence.
Manual restart
thereafter.
Manual
Manual
Automatic
Manual
Automatic, only
after first 3 daily
occurrences.
Manual reset
thereafter. Read-
ing from OAT sen-
sor must drop 5 F
(2.8 C) before
restart
Automatic, only
after first 3 daily
occurrences. Man-
ual reset thereafter.
Reading from OAT
sensor must drop
5 F (2.8 C) before
restart
Automatic
restart after first
daily occurrence.
Manual restart
thereafter.
Automatic
restart after first
daily occurrence.
Manual restart
thereafter.
Manual
Automatic once
CCN command for
EMSTOP returns to
normal
Manual once
configuration errors
are corrected
Automatic once
alarms/alerts are
cleared that pre-
vent the chiller from
starting.
PROBABLE
CAUSE
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
Faulty expansion valve, low
refrigerant charge, plugged
filter drier, faulty suction
pressure transducer, low
cooler fluid flow
Faulty expansion valve, low
refrigerant charge, plugged
filter drier, faulty suction
pressure transducer, low
cooler fluid flow
Refrigerant charge, plugged
filter drier, head pressure
control.
Refrigerant charge, plugged
filter drier, head pressure
control.
Faulty transducer/high
pressure switch, low/
restricted condenser
airflow
Faulty transducer/high
pressure switch, low/
restricted condenser
airflow
Faulty or sticking EXV, low
refrigerant charge, plugged
filter drier.
Faulty or sticking EXV, low
refrigerant charge, plugged
filter drier.
Reverse any two incoming
power leads to correct. Check
for correct fan rotation first.
CCN Network
command.
Configuration error.
Check unit settings.
Alarm notifies user
that chiller is 100%
down.