Carrier WeatherExpert 48N2 Controls, Start-Up, Operation, Service, And Troubleshooting page 123

ALARM OR
ALERT
NUMBER
T308
Return Air Relative Humidity Below Limit
T309 Return Air Relative Humidity Above Limit
T310
Supply Duct Static Pressure Below Limit
T311 Supply Duct Static Pressure Above Limit
T312 Building Static Pressure Below Limit
T313 Building Static Pressure Above Limit
T314 IAQ Above Limit
T316 OAT Below Limit
T317 OAT Above Limit
T318 Static Pressure (SP) Not Holding Setpoint
T319 Building Pressure (BP) Not Holding Setpoint
T320 DELTACFM Not Holding Setpoint
T321 SH_A1 Not Holding Setpoint
T322 SH_A2 Not Holding Setpoint
T323 SH_B1 Not Holding Setpoint
T324 SH_B2 Not Holding Setpoint
T325 Circuit A High Pressure Drop Detected – Check Filter Drier
T326 Circuit B High Pressure Drop Detected – Check Filter Drier
T327 Heat Not Holding Setpoint
T328 Cool Not Holding Setpoint
T329 Possible MLV/HGBP Failure Detected
T331
SH_A1 Flooding Detected
T332 SH_A2 Flooding Detected
T333
SH_B1 Flooding Detected
T334 SH_B2 Flooding Detected
T335
Excess Outdoor Air
A400 Hydronic Freeze Stat Trip
A404
Fire Shut Down Emergency Mode (fire-smoke)
A405 Evacuation Emergency Mode
A406
Pressurization Emergency Mode
A407 Smoke Purge Emergency Mode
T408 Dirty Main Air Filter
T409 Supply Fan Commanded Off, Sensed On Failure
A409 Supply Fan Commanded On, Sensed Off Failure
A410 Supply Fan VFD Fault
T411 Exhaust Fan VFD Fault
T412 Dirty Post Air Filter
A413 Air Pressure Safety Switch Trip
T414 Damper Air Not Modulating
P415 Main Air Filter Notification - Change Soon
P416 Post Air Filter Notification - Change Soon
T421 Thermostat Y2 Input On without Y1 On
T422 Thermostat W2 Input On without W1 On
T423 Thermostat Y and W Inputs On
T424 Thermostat G Input Off On a Cooling Call
T430 Plenum Pressure Safety Switch Trip
A430 Plenum Pressure Safety Switch Trip
T431 PE Motor Starter Protector Tripped
A432
PE Motor Starter Protector Lockout
A433 3-Phase Power Failure
T500
Current Sensor Board Failure - A1
T501 Current Sensor Board Failure - A2
T502
Current Sensor Board Failure - B1
T503 Current Sensor Board Failure - B2
T504
Current Sensor Board Failure - A3
T505 Current Sensor Board Failure - B3
T506
Current Sensor Board Failure - A4
T507 Current Sensor Board Failure - B4
T610 Economizer 1 Actuator Out of Calibration
T611 Economizer 1 Actuator Comm Failure
T612 Economizer 1 Actuator Control Range Increased
T613 Economizer 1 Actuator Overload, Setpoint Not Reached
T614 Economizer 1 Excessive Utilization
T615 Econ 1 (Outside 1) Not Economizing When it Should
T616 Econ 1 (Outside 1) Economizing When it Should Not
T617 Econ 1 (Outside 1) Damper Stuck or Jammed
T620 Economizer 2 Actuator Out of Calibration
T621 Economizer 2 Actuator Comm Failure
Table 92 — Alert and Alarm Codes (cont)
DESCRIPTION ACTION TAKEN BY CONTROL
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Unit in emergency mode
Unit shut down
Run evacuation mode
Run pressurization mode
Run smoke purge mode
Alert only
Alert only
Unit shut down
Unit shut down
Unit shut down
Alert only
Unit shut down
Alert only
Alert only
Alert only
Run on Y2
Run on W2
No cooling or heating
Turn fan on and cool
Alert only
Unit shut down
Alert only
No building pressure control
Unit shut down
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
No economizer functions
Alert only
Alert only
Alert only
Alert only
Alert only
Alert only
Alarm only
No economizer functions
123
RESET METHOD
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Manual
Manual
Manual
Manual
Automatic
Manual
Manual
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Manual
Automatic
Automatic
Manual
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic