Carrier 48LC Series Controls, Start-Up, Operation And Troubleshooting page 39

FAULT OR ALERT
A166-OAQ OPEN SENSOR
A167-OAQ SHORTED SENSOR
A168-SPACE RELATIVE
HUMIDITY OPEN SENSOR
A169-SPACE RELATIVE
HUMIDITY SHORTED SENSOR
A170-ECON FEEDBACK RANGE
A171-ECON FEEDBACK OPEN
A172-ECON FEEDBACK
SHORTED
A190-TSTAT HEAT/COOL CALLS Run unit in mode activated first
A191-TSTAT IMPROPER COOL
A192-TSTAT IMPROPER HEAT
F200-FIRE SHUTDOWN
F201-CONDENSATE OVERFLOW Cooling Shutdown
A203-DIRTY FILTER
F204-REMOTE SHUTDOWN
A210-GENERAL STATUS
F211-GENERAL STATUS
F310-CIR.A DOWN DUE TO FAIL
F311-CIR.A LOW CHARGE
A312-CIR.A UNEXPECTED OFF
A313-CIR.A HIGH DISCHARGE
A314-CIR.A HPS TRIP
A315-CIR.A LOW DISCHARGE
A316-CIR.A LOW SUCTION
A317-CIR.A PRESSURE RATIO
F318-COMPRESSOR STUCK ON
F319-C.A1 DOWN DUE TO FAIL
A320-C.A1 REVERSE ROTATION
A321-C.A1 FAIL TO PRESSURE
F322-C.A2 DOWN DUE TO FAIL
A323-C.A2 REVERSE ROTATION
A324-C.A2 FAIL TO PRESSURE
A410-IGC IGNITION FAILURE
F411-ROLLOUT WITHOUT HEAT
F412-RUN AWAY HEAT
A510-INDOOR FAN STATUS
F511-IDF OFF WHEN COMMAND
ON
F512-IDF ONWHEN COMMAND
OFF
F600-IDF VFD COMMUNICATION
F601-IDF VFD UNEXPECTED
F602-IDF VFD LOCKOUT
A603-IDF VFD IN HAND
F604-IDF VFD IN HAND
A605-IDF VFD THERMAL
WARNING
Table 16 — SystemVu™ Controller Alarm Codes (cont)
ACTION TAKEN
BY CONTROL
No OAQ Operations
No OAQ Operations
No dehumidifying
No dehumidifying
No economizer diagnostics
No economizer diagnostics
No economizer diagnostics
Run cooling per number of
active inputs
Run heating per number of
active inputs
Unit Shutdown
Alert Generated
Unit Shutdown
Alert Generated
Unit Shutdown
Shutdown Circuit A
Shutdown Circuit A
Strike for active compressors
Unload compression and up
ODF to High cool speed
Add compressor strikes
Add compressor strikes
Add compressor strikes
Add compressor strikes
Unit in Safety Shutdown
Lockout Compressor A1
Add Strike for compressor A1
Add Strike for compressor A1
Lockout Compressor A2
Add Strike for compressor A2
Add Strike for compressor A2
Lockout Heat
Unit in Safety Shutdown
Unit in Safety Shutdown
Alert Generated
Unit Shutdown
Unit Shutdown
Unit Shutdown
Unit Shutdown
Unit Shutdown
Alert Generated
Unit Shutdown
IDF speed reduced
RESET
METHOD
Automatic Bad sensor, bad wiring, or incorrectly configured sensor.
Automatic Bad sensor, bad wiring, or incorrectly configured sensor.
Bad sensor, bad wiring, incorrectly configured sensor, loss of
Automatic
communication to SIOB.
Bad sensor, bad wiring, incorrectly configured sensor, loss of
Automatic
communication to SIOB.
Automatic Wiring problem with actuator or configuration error.
Automatic Wiring problem with actuator or configuration error.
Automatic Wiring problem with actuator or configuration error.
Automatic Bad thermostat or thermostat wiring.
Automatic Bad thermostat or thermostat wiring.
Automatic Bad thermostat or thermostat wiring.
Automatic Smoke detected by smoke detector.
Automatic Drain pan plugged, sensor error, or configuration error.
Automatic Dirty filter or expired filter timer.
Automatic Remote activation of the shutdown switch.
Automatic General switch activation or wrong configuration.
Automatic General switch activation or wrong configuration.
Compressors have 3 strikes or has been locked out by another
Manual
alarm.
Manual Low refrigerant or faulty pressure transducer.
Compressor failure, transducer failure, or nuisance operating
Automatic
conditions.
An overcharged system, high outdoor ambient temperature
Automatic coupled with dirty outdoor coil, plugged filter drier, or ODF
speeds being set too low.
An overcharged system, high outdoor ambient temperature
Automatic coupled with dirty outdoor coil, plugged filter drier, or ODF
speeds being set too low.
An undercharged system, low outdoor ambient temperature
Automatic coupled with dirty outdoor coil, plugged filter drier, or ODF
speeds being set too high
Low refrigerant charge, dirty filters, evaporator fan turning
backwards, loose or broken fan belt, plugged filter drier, faulty
Automatic
transducer, excessively cold return air, or stuck open
economizer when the ambient temperature is low.
Low refrigerant charge, plugged filter drier, faulty transducer,
Automatic the ambient temperature is low and the ODFs are running too
fast.
Manual Welded contactor or frozen compressor relay on MBB.
Compressor A1 has 3 strikes or has been locked out by
Manual
another alarm.
Automatic Wiring causing reverse rotation or faulty compressor.
Automatic Wiring causing reverse rotation or faulty compressor.
Compressor A2 has 3 strikes or has been locked out by
Manual
another alarm.
Automatic Wiring causing reverse rotation or faulty compressor.
Automatic Wiring causing reverse rotation or faulty compressor.
Automatic Faulty wiring of the IGC, no gas flow, or wrong configuration.
Faulty wiring of the IGC, or rollout switch trip without a heat
Automatic
call.
Automatic Heat stuck on causing high SAT, or low air flow.
Automatic Belt broke, motor failure, or configuration error.
Manual Fan stuck on or incorrect configuration.
Tripped circuit breaker, broken belt, bad indoor fan motor, or
Manual
incorrect configuration.
Communication failure, noise on the bus, wiring error, or
Automatic
configuration error.
Automatic VFD fault, refer to VFD section.
Power Cycle Cycle VFD locked itself out.
Automatic VFD keypad used to put the VFD in hand or off mode.
Automatic VFD keypad used to put the VFD in hand or off mode.
Automatic Motor improper size, motor overload, or configuration errors.
39
PROBABLE CAUSE