45
Table 32
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
T071
Alert
Cir. B Discharge Gas
Thermistor Failure
Average of compressor B1
and B2 (if installed)
sensors > 210° F for
30 seconds.
Circuit B shut down
Manual
Thermistor failure, damaged
cable/wire, wiring error or
motor cooling solenoid failure.
T073
Alert
Outside Air Tempera-
ture Thermistor
Failure
Thermistor outside range of
–40 to 240 F (–40 to 116 C)
Reset disabled. Runs
under normal control/
set points.
Automatic
Thermistor failure, damaged
cable/wire, wiring error or sen-
sor not installed.
T074
Alert
Space Temperature
Thermistor Failure
Thermistor outside range of
–40 to 240 F (–40 to 116 C)
Reset disabled. Runs
under normal control/
set points.
Automatic
Thermistor failure, damaged
cable/wire, wiring error or sen-
sor not installed.
T075
Alert
Compressor A1
Discharge Gas
Thermistor Failure
Thermistor outside range of –
40 to 240° F (–40 to 116° C)
Comp A1 shut down
Automatic
Thermistor failure, damaged
cable/wire, wiring error or
motor cooling solenoid failure.
T076
Alert
Compressor A2
Discharge Gas
Thermistor Failure
Thermistor outside range of –
40 to 240° F (–40 to 116° C)
Comp A2 shut down
Automatic
Thermistor failure, damaged
cable/wire, wiring error or
motor cooling solenoid failure.
T077
Alert
Compressor B1
Discharge Gas
Thermistor Failure
Thermistor outside range of –
40 to 240° F (–40 to 116° C)
Comp B1 shut down
Automatic
Thermistor failure, damaged
cable/wire, wiring error or
motor cooling solenoid failure.
T078
Alert
Compressor B2
Discharge Gas
Thermistor Failure
Thermistor outside range of –
40 to 240° F (–40 to 116° C)
Comp B2 shut down
Automatic
Thermistor failure, damaged
cable/wire, wiring error or
motor cooling solenoid failure.
T079
Alert
Lead/Lag Leaving
Fluid Temperature
Thermistor Failure
Thermistor outside range of
–40 to 240 F (–40 to 116 C)
Breaks Dual Chiller
link if set up for Paral-
lel operation.
Automatic
Thermistor failure, damaged
cable/wire, wiring error or sen-
sor not installed.
T090
Alert
Circuit A Discharge
Pressure Transducer
Failure
Voltage ratio more than
98.9% or less than 6%.
Circuit A shut down
Automatic
Transducer failure, poor con-
nection to MBB, or wiring
damage/error.
T091
Alert
Circuit B Discharge
Pressure Transducer
Failure
Voltage ratio more than
98.9% or less than 6%.
Circuit B shut down
Automatic
Transducer failure, poor con-
nection to MBB, or wiring
damage/error.
T092
Alert
Circuit A Suction
Pressure Transducer
Failure
Voltage ratio more than
99.9% or less than 0.5% for
50 seconds.
Circuit A shut down
Automatic
Transducer failure, poor con-
nection to MBB, or wiring
damage/error.
T093
Alert
Circuit B Suction
Pressure Transducer
Failure
Voltage ratio more than
99.9% or less than 0.5% for
50 seconds.
Circuit B shut down
Automatic
Transducer failure, poor con-
nection to MBB, or wiring
damage/error.
T094
Alert
Comp A1 Oil Pres-
sure Transducer
Failure
Voltage ratio more than
98.9% or less than 6%.
Comp A1 shut down
Automatic
Transducer failure, poor con-
nection to SCB, or wiring
damage/error.
T095
Alert
Comp A2 Oil Pres-
sure Transducer
Failure
Voltage ratio more than
98.9% or less than 6%.
Comp A2 shut down
Automatic
Transducer failure, poor con-
nection to SCB, or wiring
damage/error.
T096
Alert
Comp B1 Oil Pres-
sure Transducer
Failure
Voltage ratio more than
98.9% or less than 6%.
Comp B1 shut down
Automatic
Transducer failure, poor con-
nection to SCB, or wiring
damage/error.
T097
Alert
Comp B2 Oil Pres-
sure Transducer
Failure
Voltage ratio more than
98.9% or less than 6%.
Comp B2 shut down
Automatic
Transducer failure, poor con-
nection to SCB, or wiring
damage/error.
T098
Alert
Circuit A Economizer
Pressure Transducer
Failure – 1
Voltage ratio more than
99.9% or less than 0.5% for
50 seconds.
Circuit A shut down
Automatic
Transducer failure, poor con-
nection to SCB, or wiring
damage/error.
Alert
Circuit A Economizer
Pressure Transducer
Failure – 2
Economizer pressure is more
than 12 psi (83 kPa) less than
suction pressure.
Circuit A shut down
Manual
Suction and Economizer pres-
sure connectors/wiring are
swapped.
T099
Alert
Circuit B Economizer
Pressure Transducer
Failure – 1
Voltage ratio more than
99.9% or less than 0.5% for
50 seconds.
Circuit B shut down
Automatic
Transducer failure, poor con-
nection to SCB, or wiring
damage/error.
Alert
Circuit B Economizer
Pressure Transducer
Failure – 2
Economizer pressure is more
than 12 psi (83 kPa) less than
suction pressure.
Circuit B shut down
Manual
Suction and Economizer pres-
sure connectors/wiring are
swapped.
T110
Alert
Circuit A Loss of
Charge
Discharge pressure reading
< 10 psig for 30 seconds.
Circuit A shut down
Manual
Refrigerant leak or transducer
failure.
T111
Alert
Circuit B Loss of
Charge
Discharge pressure reading
< 10 psig for 30 seconds.
Circuit B shut down
Manual
Refrigerant leak or transducer
failure.