Carrier AQUASNAP 30RAP010-150 Controls, Start-Up, Operation, Service, And Troubleshooting page 75

ALARM/ ALARM
ALERT OR
CODE ALERT
Circuit A Low Cooler
T116 Alert
Suction Temperature
Circuit B Low Cooler
T117 Alert
Suction Temperature
High Discharge Gas
P118 Pre-Alert
Temperature
T118/ High Discharge Gas
Alert
A118 Temperature
Circuit A High
T126 Alert
Head Pressure
Circuit B High
T127 Alert
Head Pressure
Circuit A Low Suction
T133 Alert
Pressure
Circuit B Low Suction
T134 Alert
Pressure
Reverse Rotation
A140 Alarm
Detected
Unit is in Emergency
A150 Alarm
Stop
A151 Alarm Illegal Configuration
Unit Down Due to
A152 Alarm
Failure
Real Time Clock
T153 Alert
Hardware Failure
Serial EEPROM
A154 Alarm
Hardware Failure
Serial EEPROM
T155 Alert
Storage Failure
See Legend on page 78.
Table 36 — Alarm and Alert Codes (cont)
WHY WAS THIS
DESCRIPTION ALARM
GENERATED?
Mode 7 caused the com-
pressor to unload 6 con-
secutive times with less
than a 30-minute interval
between each circuit shut-
down.
Mode 8 caused the com-
pressor to unload 6 con-
secutive times with less
than a 30-minute interval
between each circuit shut-
down.
Discharge Thermistor
(DTT) reading is greater
than 250 F
3 Discharge Gas Tempera-
ture alerts occur within a
day
Compressor operation out-
side of operating envelope.
Compressor operation out-
side of operating envelope.
Suction pressure below
34 psig for 8 seconds or
below 23 psig
Suction pressure below
34 psig for 8 seconds or
below 23 psig
Suction pressure failed to
drop when compressor is
energized
CCN emergency stop
command received
One or more illegal
configurations exists.
Both circuits are down due
to alarms/alerts.
Internal clock on MBB fails
Hardware failure with MBB
Configuration/storage
failure with MBB
ACTION TAKEN
BY CONTROL
Circuit shut down
Circuit shut down
Compressor A1 shut
down
Compressor A1 shut
down
Circuit shut down
Circuit shut down
Circuit shut down
Circuit shut down
Chiller not allowed to
start.
Chiller shutdown
Chiller is not allowed to
start.
Chiller is unable
to run.
Occupancy schedule
will not be used. Chiller
defaults to Local On
mode.
Chiller is unable
to run.
No Action
75
RESET PROBABLE
METHOD CAUSE
Faulty expansion
valve, low
refrigerant charge,
plugged
filter drier, faulty suc-
Manual tion
pressure transducer,
low
cooler fluid flow,
improper brine
freeze set point
Faulty expansion
valve, low
refrigerant charge,
plugged
filter drier, faulty suc-
Manual tion
pressure transducer,
low
cooler fluid flow,
improper brine
freeze set point
Refrigerant charge,
plugged filter drier,
Automatic
head pressure con-
trol.
Refrigerant charge,
plugged filter drier,
Manual
head pressure con-
trol.
Automatic, only after Faulty transducer,
first 3 daily occur- low/
rences. restricted condenser
Manual reset thereaf- airflow, refrigerant
ter. Reading from overcharge, non-con-
OAT sensor must densables, faulty
drop 5 F (2.8 C) condenser fan motor,
before restart faulty EXV.
Automatic, only Faulty transducer/
after first 3 daily restricted condenser
occurrences. Man- airflow, refrigerant
ual reset thereafter. overcharge, non-con-
Reading from OAT densables, faulty
sensor must drop 5 F condenser fan motor,
(2.8 C) before restart faulty EXV.
Automatic Faulty or sticking
restart after first EXV, low
daily occurrence. refrigerant charge,
Manual restart plugged
thereafter. filter drier.
Automatic Faulty or sticking
restart after first EXV, low
daily occurrence. refrigerant charge,
Manual restart plugged
thereafter. filter drier.
Verify correct com-
pressor rotation.
Manual
Check for correct fan
rotation first.
Automatic once CCN
command for CCN Network
EMSTOP returns to command.
normal
Manual once
Configuration error.
configuration errors
Check unit settings.
are corrected
Automatic once
alarms/alerts are Alarm notifies user
cleared that prevent that chiller is 100%
the chiller from down.
starting.
Automatic when Time/Date/Month/
correct clock control Day/Year not
restarts. properly set.
Main Base Board
Manual
failure.
Potential failure of
MBB. Download
current operating
Manual
software. Replace
MBB if error occurs
again.