ALARM/
ALARM OR
ALERT CODE
ALERT
COMM FAIL
Alert
T048
Alert
T049
Alert
A051
Alarm
T051
Alert
A052
Alarm
T052
Alert
A053
Alarm
T053
Alert
A055
Alarm
T055
Alert
A056
Alarm
T056
Alert
A057
Alarm
T057
Alert
Alarm
A060
Alarm
Alarm
A061
Alarm
T068
Alert
T069
Alert
T073
Alert
T074
Alert
T082
Alert
T090
Alert
T091
Alert
LEGEND
A/D
— Analog/Digital
AUX
— Auxiliary
EEPROM — Electrically Erasable Programmable Read-Only Memory
Table 79 —Alarm and Alert Codes
DESCRIPTION
Communications Failure
Circuit A Compressor
Availability Alert
Circuit B Compressor
Availability Alert
Circuit A, Compressor 1
Stuck On Failure
Circuit A, Compressor 1
Chattering Failure
Circuit A, Compressor 1
Failure
Circuit A, Compressor 2
Stuck On Failure
Circuit A, Compressor 2
Chattering Failure
Circuit A, Compressor 2
Failure
Circuit A, Compressor 3
Stuck On Failure
Circuit A, Compressor 3
Chattering Failure
Circuit A, Compressor 3
Failure
Circuit B, Compressor 1
Stuck On Failure
Circuit B, Compressor 1
Chattering Failure
Circuit B, Compressor 1
Failure
Circuit B, Compressor 2
Stuck On Failure
Circuit B, Compressor 2
Chattering Failure
Circuit B, Compressor 2
Failure
Circuit B, Compressor 3
Stuck On Failure
Circuit B, Compressor 3
Chattering Failure
Circuit B, Compressor 3
Failure
Supply Air
Thermistor Failure
Remote Supply Air Temperature
Update not received
Return Air
Thermistor Failure
Remote Return Air Temperature
Update not received
Circuit A Return Gas
Thermistor Failure
Circuit B Return Gas
Thermistor Failure
Outside Air
Thermistor Failure
Space Temperature
Thermistor Failure
Space Temperature Offset
Sensor Failure
Circuit A Discharge Pressure
Transducer Failure
Circuit B Discharge Pressure
Transducer Failure
ACTION TAKEN
BY CONTROL
If communications between the scrolling
marquee and the Main Base Board (MBB)
are lost, unit may continue to run. If the
communication is internal to the MBB, the
unit will shut down or not be allowed to
start.
Circuit is shut down
Circuit shut down
All compressor outputs de-energized. Head
pressure control remains active.
Affected compressor is shut down
Affected compressor is shut down
All compressor outputs de-energized. Head
pressure control remains active.
Affected compressor is shut down
Affected compressor is shut down
All compressor outputs de-energized. Head
pressure control remains active.
Affected compressor is shut down
Affected compressor is shut down
All compressor outputs de-energized. Head
pressure control remains active.
Affected compressor is shut down
Affected compressor is shut down
All compressor outputs de-energized. Head
pressure control remains active.
Affected compressor is shut down
Affected compressor is shut down
All compressor outputs de-energized. Head
pressure control remains active.
Affected compressor is shut down
Affected compressor is shut down
Unit shut down
Unit shut down
Unit shut down
Unit shut down
Circuit shut down
Circuit shut down
Outside Air Temperature Reset will be dis-
abled and the unit will run under normal set
point control. Outdoor Ambient Lockout is
disabled.
Space Temperature Reset will be dis-
abled.and the unit will run under normal set
point control.
Space Temperature Offset disabled. Unit
will run under normal control without space
temperature offset.
Circuit A shut down
Circuit B shut down
163
RESET
DETAILS PAGE
METHOD
REFERENCE
Automatic once commun-
166
ciations are re-established
Manual
166
Manual
166
Manual
166
Manual
166
Manual
166
Manual
166
Manual
166
Manual
166
Manual
166
Manual
166
Manual
166
Manual
166
Manual
166
Manual
166
Manual
166
Manual
166
Manual
166
Manual
166
Manual
166
Manual
166
Automatic
167
Automatic
167
Automatic
167
Automatic
167
Automatic
167
Automatic
167
Automatic
167
Automatic
167
Automatic
167
Automatic
167
Automatic
167
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