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Table 42 — Alarm and Alert Codes (cont)
ALARM/
ALERT
CODE
ALARM
OR
ALERT
DESCRIPTION
WHY WAS THIS
ALARM
GENERATED?
ACTION TAKEN
BY CONTROL
RESET
METHOD
PROBABLE
CAUSE
T110 Alert 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
T111 Alert Circuit B 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
T112 Alert
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.
T113 Alert
Circuit B 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.
T114 Alert
Circuit A Low Suction
Superheat
Suction superheat is
less than 5° F (2.8 C) for 5
minutes.
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
T115 Alert
Circuit B Low Suction
Superheat
Suction superheat is
less than 5° F (2.8 C) for 5
minutes.
Circuit B shut down.
Automatic restart
after first daily
occurrence.
Manual restart
thereafter.
Faulty expansion valve,
faulty suction pressure
transducer, faulty suction
gas thermistor, circuit
overcharged
T116 Alert
Circuit A Low Cooler
Suction Temperature
Mode 7 caused the com-
pressor to unload 6 consecu-
tive times with less than a
30-minute interval between
each circuit shutdown.
Circuit shut down Manual
Faulty expansion valve, low
refrigerant charge, plugged
filter drier, faulty suction
pressure transducer, low
cooler fluid flow
T117 Alert
Circuit B Low Cooler
Suction Temperature
Mode 8 caused the com-
pressor to unload 6 consecu-
tive times with less than a
30-minute interval between
each circuit shutdown.
Circuit shut down Manual
Faulty expansion valve, low
refrigerant charge, plugged
filter drier, faulty suction
pressure transducer, low
cooler fluid flow
T118 Alert
High Discharge Gas
Temperature Alert
Discharge Thermistor (DTT)
reading is greater than 250 F
Compressor A1 shut
down
Automatic
Refrigerant charge, plugged
filter drier, head pressure
control.
A118 Alarm
High Discharge Gas
Temperature
3 Discharge Gas Tempera-
ture alarms occur within a
day
Compressor A1 shut
down
Manual
Refrigerant charge, plugged
filter drier, head pressure
control.
T126 Alert
Circuit A High
Discharge Pressure
Compressor operation out-
side of operating envelope.
Circuit shut down
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
Faulty transducer/high
pressure switch, low/
restricted condenser
airflow
T127 Alert
Circuit B High
Discharge Pressure
Compressor operation out-
side of operating envelope.
Circuit shut down
Automatic, only
after first 3 daily
occurrences. Man-
ual reset thereafter.
Reading from OAT
sensor must drop
5 F (2.8 C) before
restart
Faulty transducer/high
pressure switch, low/
restricted condenser
airflow
T133 Alert
Circuit A Low Suction
Pressure
Suction pressure below
34 psig for 8 seconds or
below 23 psig
Circuit shut down
Automatic
restart after first
daily occurrence.
Manual restart
thereafter.
Faulty or sticking EXV, low
refrigerant charge, plugged
filter drier.
T134 Alert
Circuit B Low Suction
Pressure
Suction pressure below
34 psig for 8 seconds or
below 23 psig
Circuit shut down
Automatic
restart after first
daily occurrence.
Manual restart
thereafter.
Faulty or sticking EXV, low
refrigerant charge, plugged
filter drier.
A140 Alert
Reverse Rotation
Detected
Incoming chiller power leads
not phased correctly
Chiller not allowed to
start.
Manual
Reverse any two incoming
power leads to correct. Check
for correct fan rotation first.
A150 Alarm Emergency Stop
CCN emergency stop
command received
Chiller shutdown
without going through
pumpdown.
Automatic once
CCN command for
EMSTOP returns to
normal
CCN Network
command.
A151 Alarm Illegal Configuration
One or more illegal
configurations exists.
Chiller is not allowed to
start.
Manual once
configuration errors
are corrected
Configuration error.
Check unit settings.
A152 Alarm
Unit Down Due to
Failure
Both circuits are down due
to alarms/alerts.
Chiller is unable
to run.
Automatic once
alarms/alerts are
cleared that pre-
vent the chiller from
starting.
Alarm notifies user
that chiller is 100%
down.