Carrier 48LC Series Controls, Start-Up, Operation And Troubleshooting page 38

FAULT OR ALERT
F010-MBB LOW VOLTAGE
F011-MBB REFERENCE
VOLTAGE
A012-MBB ZERO CROSSING
F013-MBB FUSE 2 OPEN
F014-MBB FUSE 3 OPEN
A015-MBB RNET VOLTAGE
RANGE
A016-MBB 24VDC RANGE
A017-MBB 5VDC RANGE
F018-MBB EEPROM FAILURE
A019-MBB CLOCK FAILURE
A099-COMM LOSS WITH SIOB ON
LEN BUS
F020-SOFTWARE ERROR
A100-SAT SENSOR ERROR
A101-FST SENSOR RANGE
A102-FST OPEN SENSOR
A103-FST SHORTED SENSOR
A104-OAT SENSOR RANGE
A105-OAT OPEN SENSOR
A106-OAT SHORTED SENSOR
A107-RAT SENSOR RANGE
A108-RAT OPEN SENSOR
A109-RAT SHORTED SENSOR
A110-SPT SENSOR RANGE
A111-SPT OPEN SENSOR
A112-SPT SHORTED SENSOR
A130-CIR.A SSP SENSOR RANGE Shutdown Circuit A
A131-CIR.A SSP OPEN SENSOR
A132-CIR.A SSP SHORT SENSOR Shutdown Circuit A
A133-CIR.A SDP SENSOR RANGE Shutdown Circuit A
A134-CIR.A SDP OPEN SENSOR
A135-CIR.A SDP SHORT SENSOR Shutdown Circuit A
A150-OUTDOOR AIRFLOW IN
CFM OPEN SENSOR
A151-OUTDOOR AIRFLOW IN
CFM SHORTED SENSOR
A160-OARH OPEN SENSOR
A161-OARH SHORTED SENSOR
A162-RARH OPEN SENSOR
A163-RARH SHORTED SENSOR
A164-IAQ OPEN SENSOR
A165-IAQ SHORTED SENSOR
Table 16 — SystemVu™ Controller Alarm Codes
ACTION TAKEN
BY CONTROL
Unit Shutdown
Unit Shutdown
Alert Generated
Unit Shutdown
Unit Shutdown
Alert Generated
4-20mA inputs will be in error
Transducer inputs will be in
error
Unit Shutdown
No time, date, and schedule
operation
Loss of communication with IO
from SIOB board
Unit Shutdown
No free cooling, and no SAT
limit protection
Alert Generated
Alert Generated
Alert Generated
No free cooling, no low ambient
operation
No free cooling, no low ambient
operation
No free cooling, no low ambient
operation
No differential DB crossover
No differential DB crossover
No differential DB crossover
No heating or cooling
No heating or cooling
No heating or cooling
Shutdown Circuit A
Shutdown Circuit A
No OACFM Operations
No OACFM Operations
No Enthalpy crossover
No Enthalpy crossover
No Differential Enthalpy
crossover
No Differential Enthalpy
crossover
No IAQ Operations
No IAQ Operations
RESET
METHOD
Brownout condition, low supply voltage, supply power missing
Automatic
a phase.
Automatic MBB failure or supply voltage low.
Automatic MBB failure or supply voltage frequency too high or too low.
A switch input has a wiring error or the switch pulled too much
Automatic
current.
A switch input has a wiring error or the switch pulled too much
Automatic
current.
Automatic MBB failure or supply voltage low.
Automatic MBB failure or supply voltage low.
Automatic MBB failure or supply voltage low.
Automatic Software failure or MBB failure.
Automatic Software failure or MBB failure.
Automatic Wiring problem between MBB and SIOB
Automatic Corrupt software or software failure.
Faulty, shorted, or open thermistor caused by wiring error or
Automatic
loose connection.
Faulty or incorrect thermistor caused by improper ohm
Automatic
reading.
Missing or open thermistor caused by wiring error or loose
Automatic
connection.
Faulty or shorted thermistor caused by wiring error or loose
Automatic
connection.
Faulty or incorrect thermistor caused by improper ohm
Automatic
reading.
Missing or open thermistor caused by wiring error or loose
Automatic
connection.
Faulty or shorted thermistor caused by wiring error or loose
Automatic
connection.
Faulty or incorrect thermistor caused by improper ohm
Automatic
reading.
Missing or open thermistor caused by wiring error or loose
Automatic
connection.
Faulty or shorted thermistor caused by wiring error or loose
Automatic
connection.
Faulty or incorrect thermistor caused by improper ohm
Automatic
reading.
Missing or open thermistor caused by wiring error or loose
Automatic
connection.
Faulty or shorted thermistor caused by wiring error or loose
Automatic
connection.
Faulty transducer, faulty 5-v power supply, or loose
Automatic
connection.
Faulty transducer, faulty 5-v power supply, or loose
Automatic
connection.
Faulty transducer, faulty 5-v power supply, or loose
Automatic
connection.
Faulty transducer, faulty 5-v power supply, or loose
Automatic
connection.
Faulty transducer, faulty 5-v power supply, or loose
Automatic
connection.
Faulty transducer, faulty 5-v power supply, or loose
Automatic
connection.
Automatic Wiring problem or configuration error.
Automatic Wiring problem or configuration error.
Automatic Bad sensor, bad wiring, or incorrectly configured sensor.
Automatic Bad sensor, bad wiring, or incorrectly configured sensor.
Automatic Bad sensor, bad wiring, or incorrectly configured sensor.
Automatic Bad sensor, bad wiring, or incorrectly configured sensor.
Automatic Bad sensor, bad wiring, or incorrectly configured sensor.
Automatic Bad sensor, bad wiring, or incorrectly configured sensor.
38
PROBABLE CAUSE