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Table12–SystemVut Controller Alarm Codes
FAULT OR ALERT
ACTION TAKEN BY
CONTROL
RESET
METHOD
PROBABLE CAUSE
F010--- MBB LOW VOLTAGE Unit Shutdown Automatic Brownout condition, low supply voltage, supply power missing a phase.
F011--- MBB REFERENCE VOLTAGE Unit Shutdown Automatic MBB failure or supply voltage low
A012--- MBB ZERO CROSSING Alert Generated Automatic MBB failure or supply voltage frequency to high or too low.
F013--- MBB FUSE 2 OPEN Unit Shutdown Automatic A switch input has a wiring error or the switch pulled too much current.
F014--- MBB FUSE 3 OPEN Unit Shutdown Automatic A switch input has a wiring error or the switch pulled too much current.
A015--- MBB RNET VOLTAGE RANGE Alert Generated Automatic MBB failure or su pply voltage low
A016--- MBB 24VDC RANGE 4-- -20mA inputs will be in error Automatic MBB failure or su pply voltage low
A017--- MBB 5VDC RANGE Transducer inputs will be in error Automatic MBB failure or supply voltage low
F018--- MBB EEPROM FAILURE Unit Shutdown Automatic Software failure or MBB failure
A019--- MBB CLOCK FAILURE No time, date, and schedule
operation
Automatic Software failure or MBB failure
F020--- SOFTWARE ERROR Unit Shutdown Automatic Corrupt Software or software failure
A100--- SAT SENSOR ERROR No free cooling, and no SAT
limit protection
Automatic Faulty , shorted, or open thermistor caused by wiring error or loose connection.
A101--- FST SENSOR RANGE Alert Generated Automatic Faulty or incorrect thermistor caused by improper ohm reading
A102--- FST OPEN SENSOR Alert Generated Automatic Missing or open thermistor caused by wiring error or loose connection.
A103--- FST SHORTED SENSOR Alert Generated Automatic Faulty or shorted thermistor caused by wiring error or loose connection.
A104--- OAT SENSOR RANGE No free cooling, no low
ambient operation
Automatic Faulty or incorrect thermistor caused by improper ohm reading
A105--- OAT OPEN SENSOR No free cooling, no low
ambient operation
Automatic Missing or open thermistor caused by wiring error or loose connection.
A106--- OAT SHORTED SENSOR No free cooling, no low
ambient operation
Automatic Faulty or shorted thermistor caused by wiring error or loose connection.
A107--- RAT SENSOR RANGE No differential DB crossover Automatic Faulty or incorrect thermistor caused by improper ohm reading
A108--- RAT OPEN SENSOR No differential DB crossover Automatic Missing or open thermistor caused by wiring error or loose connection.
A109--- RAT SHORTED SENSOR No different ial DB crossover Automatic Faulty or shorted thermistor caused by wiring error or loose connection.
A110--- SPT SENSOR RANGE No heating or cooling Automatic Faulty or incorrect thermistor caused by improper ohm reading
A111--- SPT OPEN SENSOR No heating or cooling Automatic Missing or open thermistor caused by wiring error or loose connection.
A112--- SPT SHORTED SENSOR No heating or cooling Automatic Faulty or shorted thermistor caused by wiring error or loose connection.
A130--- CIR.A SSP SENSOR RANGE Shutdown Circuit A Automatic Faulty transducer, faulty 5--- V power supply, or loose connection
A131--- CIR.A SSP OPEN SENSOR Shutdown Circuit A Automatic Faulty transducer, faulty 5--- V power supply, or loose connection
A132--- CIR.A SSP SHORT SENSOR Shutdown Circuit A Automatic Faulty transducer, faulty 5--- V power supply, or loose connection
A133--- CIR.A SDP SENSOR RANGE Shutdown Circuit A Automatic Faulty transducer, faulty 5--- V power supply, or loose connection
A134--- CIR.A SDP OPEN SENSOR Shutdown Circuit A Automatic Faulty transducer, faulty 5--- V power supply, or loose connection
A135--- CIR.A SDP SHORT SENSOR Shutdown Circuit A Automatic Faulty transducer, faulty 5--- V power supply, or loose connection
A150--- OUTDOOR AIRFLOW IN CFM OPEN
SENSOR
No OACFM Operations Automatic Wiring problem, or configuration error
A151--- OUTDOOR AIRFLOW IN CFM
SHORTED SENSOR
No OACFM Operations Automatic Wiring problem, or configuration error
A160--- OARH OPEN SENSOR No Enthalpy crossover Automatic Bad sensor, bad wiring, or sensor configured incorrectly.
A161--- OARH SHORTED SENSOR No Enthalpy crossover Automatic Bad sensor, bad wiring, or sensor configured incorrectly.
A162--- RARH OPEN SENSOR No Differential Enthalpy
crossover
Automatic Bad sensor, bad wiring, or sensor configured incorrectly.
A163--- RARH SHORTED SENSOR No Differential Enthalpy
crossover
Automatic Bad sensor, bad wiring, or sensor configured incorrectly.
A164--- IAQ OPEN SENSOR No IAQ Operations Automatic Bad sensor, bad wiring, or sensor configured incorrectly.
A165--- IAQ SHORTED SENSOR No IAQ Operations Automatic Bad sensor, bad wiring, or sensor configured incorrectly.
A166--- OAQ OPEN SENSOR No OAQ Operations Automatic Bad sensor, bad wiring, or sensor configured incorrectly.
A167--- OAQ SHORTED SENSOR No OAQ Operations Automatic Bad sensor, bad wiring, or sensor configured incorrectly.
A168--- SPACE RELATIVE HUMIDITY OPEN
SENSOR
No dehumidifying Automatic Bad sensor, bad wiring, sensor configured incorrectly, loss of communication
to SIOB.
A169--- SPACE RELATIVE HUMIDITY
SHORTED SENSOR
No dehumidifying Automatic Bad sensor, bad wiring, sensor configured incorrectly, loss of communication
to SIOB.
A170--- ECON FEEDBACK RANGE No economizer diagnostics Automatic Wiring problem with actuator , or configuration error
A171--- ECON FEEDBACK OPEN No economizer diagnostics Automatic Wiring problem with actuator, or configuration error
A172--- ECON FEEDBACK SHORTED No economizer diagnostics Automatic Wiring problem with actuator , or configuration error
A190--- TSTA T HEAT/COOL CALLS Run unit in mode activated first Automatic Bad Thermostat or Thermostat Wiring
A191--- TSTAT IMPROPER COOL Run cooling per number of
active inputs
Automatic Bad Thermostat or Thermostat Wiring
A192--- TSTAT IMPROPER HEAT Run heating per number of
active inputs
Automatic Bad Thermostat or Thermostat Wiring
F200--- FIRE SHUTDOWN Unit Shutdown Automatic Smoke detected by smoke detector
F201---CONDENSATE OVERFLOW Cooling Shutdown Automatic Dain pan plugged, sensor error, or configuration error
A203--- DIRTY FILTER Alert Generated Automatic DirtyFilterorfiltertimerexpired
F204--- REMOTE SHUTDOWN Unit Shutdown Automatic Remote activation of the shutdown switch
F205--- IDF MANUAL LIMIT TRIP Unit Shutdown Automatic LimitSwitchonIndoorFantripsduetohightemperatureatthemotor
F206--- PHASE MONITOR TRIP Unit Shutdown Automatic Power supply phase missing or out of phase
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