119
Table 92 — Alert and Alarm Codes (cont)
ALARM
OR
ALERT
NUMBER
DESCRIPTION ACTION TAKEN BY CONTROL RESET METHOD
A180 Cir B EXV Control Board Comm Failure Circuit shut down Automatic
A200 Linkage Timeout Error - Comm Failure Resorts to local unit setpoints Automatic
T210 Building Pressure Transducer Failure No building pressure control function Automatic
T211 Static Pressure Transducer Failure No static pressure control Automatic
T220 Indoor Air Quality Sensor Failure No IAQ control Automatic
T221 Outdoor Air Quality Sensor Failure OAQ defaults to 400 ppm Automatic
T229 Economizer Min Pos Override Input Failure Operate without override Automatic
T245 Outside Air Cfm Sensor Failure No OA CFM control Automatic
T246 Supply Air Cfm Sensor Failure Unit shut down Automatic
T247 Return Air Cfm Sensor Failure Unit shut down Automatic
T248 Exhaust Air Cfm Sensor Failure Alert only Automatic
T300 Space Temperature Below Limit Alert only Automatic
T301 Space Temperature Above Limit Alert only Automatic
T302 Supply Temperature Below Limit Alert only Automatic
T303 Supply Temperature Above Limit Alert only Automatic
T304 Return Temperature Below Limit Alert only Automatic
T305 Return Temperature Above Limit Alert only Automatic
T308 Return Air Relative Humidity Below Limit Alert only Automatic
T309 Return Air Relative Humidity Above Limit Alert only Automatic
T310 Supply Duct Static Pressure Below Limit Alert only Automatic
T311 Supply Duct Static Pressure Above Limit Alert only Automatic
T312 Building Static Pressure Below Limit Alert only Automatic
T313 Building Static Pressure Above Limit Alert only Automatic
T314 IAQ Above Limit Alert only Automatic
T316 OAT Below Limit Alert only Automatic
T317 OAT Above Limit Alert only Automatic
T318 SP Not Holding Setpoint Alert only Automatic
T319 BP Not Holding Setpoint Alert only Automatic
T320 DELTACFM Not Holding Setpoint Alert only Automatic
T321 SH_A1 Not Holding Setpoint Alert only Automatic
T322 SH_A2 Not Holding Setpoint Alert only Automatic
T323 SH_B1 Not Holding Setpoint Alert only Automatic
T324 SH_B2 Not Holding Setpoint Alert only Automatic
T325 Circuit A High Pressure Drop Detected – Check Filter Drier Alert only Automatic
T326 Circuit B High Pressure Drop Detected – Check Filter Drier Alert only Automatic
T327 Heat Not Holding Setpoint Alert only Automatic
T328 Cool Not Holding Setpoint Alert only Automatic
T329 Possible MLV/HGBP Failure Detected Alert only Automatic
T335 Excess Outdoor Air Alert only Automatic
A400 Hydronic Freeze Stat Trip Unit in emergency mode Automatic
A404 Fire Shut Down Emergency Mode (fire-smoke) Unit shut down Automatic
A405 Evacuation Emergency Mode Run evacuation mode Automatic
A406 Pressurization Emergency Mode Run pressurization mode Automatic
A407 Smoke Purge Emergency Mode Run smoke purge mode Automatic
T408 Dirty Air Filter Alert only Automatic
T409 Supply Fan Status Failure Alert only Manual
A409 Supply Fan Status Failure Unit shut down Manual
A410 Supply Fan VFD Fault Unit shut down Manual
A411 Exhuast Fan VFD Fault Unit shut down Manual
T412 Dirty Post Air Filter Alert only Automatic
T413 Air Pressure Switch Failure Unit shut down Manual
T414 UV-C Lamp Failure Alert only Automatic
T415 Damper Not Modulating Alert only Manual
T421 Thermostat Y2 Input On without Y1 On Run on Y2 Automatic
T422 Thermostat W2 Input On without W1 On Run on W2 Automatic
T423 Thermostat Y and W Inputs On No cooling or heating Automatic
T424 Thermostat G Input Off On a Cooling Call Turn fan on and cool Automatic
T430 Plenum Pressure Safety Switch Trip Alert only Automatic
A430 Plenum Pressure Safety Switch Trip Unit shut down Manual
T431 Motor Starter Protector Trip Alert only Automatic
A432 Motor Starter Protector Lockout No building pressure control Automatic
T433 3-Phase Power Failure Unit shut down Manual
T500 Current Sensor Board Failure - A1 Alert only Automatic
T501 Current Sensor Board Failure - A2 Alert only Automatic
T502 Current Sensor Board Failure - B1 Alert only Automatic
T503 Current Sensor Board Failure - B2 Alert only Automatic
T504 Current Sensor Board Failure - A3 Alert only Automatic
T505 Current Sensor Board Failure - B3 Alert only Automatic
T506 Current Sensor Board Failure - A4 Alert only Automatic
T507 Current Sensor Board Failure - B4 Alert only Automatic
T610 Economizer Actuator Out of Calibration Alert only Automatic
T611 Economizer Actuator Comm Failure No economizer functions Automatic
T612 Economizer Actuator Control Range Increased Alert only Automatic
T613 Econ Actuator Overload, Setpt Not Reached Alert only Automatic
T614 Econ Actuator Hunting Excessively Alert only Automatic
T615 Econ 1 (Outside 1) Not Economizing When it Should Alert only Automatic
T616 Econ 1 (Outside 1) Economizing When it Should Not Alert only Automatic
T617 Econ 1 (Outside 1) Damper Stuck or Jammed Alert only Automatic
A620 Economizer 2 Actuator Out of Calibration Alarm only Automatic
A621 Economizer 2 Actuator Comm Failure No economizer functions Automatic
T622 Economizer 2 Actuator Control Range Increased Alert only Automatic
A623 Econ2 Overload, Setpt Not Reached Alarm only Automatic
A624 Econ2 Actuator Hunting Excessively Alert only Automatic
T625 Econ 2 (Return) Not Economizing When it Should Alert only Automatic
T626 Econ 2 (Return) Economizing When it Should Not Alert only Automatic
T627 Econ 2 (Return) Damper Stuck or Jammed Alert only Automatic
T630 Humidifier Actuator Out of Calibration Alert only Automatic
T631 Humidifier Actuator Communication Failure No humidifer functions Automatic
T632 Humidifier Actuator Control Range Increased Alert only Automatic
T633 Humidifier Act Overload, Setpt Not Reached Alert only Automatic
T634 Humidifier Actuator Hunting Excessively Alert only Automatic
A640 Heating Coil Actuator Out of Calibration Alarm only Automatic
A641 Heating Coil Actuator Comm Fail No heating coil functions Automatic
T642 Heat Coil Actuator Control Range Increased Alert only Automatic
A643 Ht Coil Act Ovrload, Setpt Pos Not Reached Alarm only Automatic
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