Carrier 48/50Z030-105 Table 86 Alert and Alarm , C, odes

95
Table 86 — Alert and Alarm
C
odes
ALARM OR
ALERT NUMBER DESCRIPTION ACTION TAKEN BY CONTROL RESET METHOD
T051 Circuit A, Compressor 1 Failure Compressor locked off (after 3 strikes) Automatic then manual after 3 strikes
A051 Circuit A, Compressor 1 Stuck On Failure Compressor locked off Manual
T052 Circuit A, Compressor 2 Failure Compressor locked off (after 3 strikes) Automatic then manual after 3 strikes
A052 Circuit A, Compressor 2 Stuck On Failure Compressor locked off Manual
T055 Circuit B, Compressor 1 Failure Compressor locked off (after 3 strikes) Automatic then manual after 3 strikes
A055 Circuit B, Compressor 1 Stuck On Failure Compressor locked off Manual
T056 Circuit B, Compressor 2 Failure Compressor locked off (after 3 strikes) Automatic then manual after 3 strikes
A056 Circuit B, Compressor 2 Stuck On Failure Compressor locked off Manual
T057 Circuit A, High Pressure Switch Failure Compressor locked off Automatic then manual T058 Circuit B, High Pressure Switch Failure Compressor locked off Automatic then manual T072 Evap. Discharge Reset Sensor Failure No supply air reset applied Automatic T073 Outside Air Temperature Thermistor Failure No OAT functions allowed Automatic T074 Space Temperature Thermistor Failure No SPT functions allowed Automatic T075 Return Air Thermistor Failure No RAT functions allowed Automatic T076 Outside Air Relative Humidity Sensor Fail No outside air RH functions allowed Automatic T077 Space Relative Humidity Sensor Failure No space RH functions allowed Automatic T078 Return Air Relative Humidity Sensor Fail No return air RH functions allowed Automatic T082 Space Temperature Offset Sensor Failure No space temperature offset applied Automatic T090 Circ A Discharge Press Transducer Failure Circuit shut down Automatic T091 Circ B Discharge Press Transducer Failure Circuit shut down Automatic T092 Circ A Suction Press Transducer Failure Circuit shut down Automatic T093 Circ B Suction Press Transducer Failure Circuit shut down Automatic T094 Circ A Discharge Press exceeded 440 psig Circuit shut down Manual T095 Circ B Discharge Press exceeded 440 psig Circuit shut down Manual T130 Low Suction Pressure Circuit A Circuit staged down Automatic then manual after 3 strikes T131 Low Suction Pressure Circuit B Circuit staged down Automatic then manual after 3 strikes T132 High Suction Pressure Circuit A Circuit shut down Automatic then manual after 3 strikes T133 High Suction Pressure Circuit B Circuit shut down Automatic then manual after 3 strikes T134 High Discharge Pressure Circuit A Circuit staged down Automatic then manual after 3 strikes T135 High Discharge Pressure Circuit B Circuit staged down Automatic then manual after 3 strikes T136 Compressor A1 low differential pressure Circuit shut down Manual T137 Compressor A2 low differential pressure Circuit shut down Manual T138 Compressor B1 low differential pressure Circuit shut down Manual T139 Compressor B2 low differential pressure Circuit shut down Manual T140 Circ A Max Diff Operating Press Exceeded Circuit shut down Manual T141 Circ B Max Diff Operating Press Exceeded Circuit shut down Manual
A150 Unit is in Emergency Stop Unit shut down Manual A152 Unit Down due to Failure No mechanical cooling available Automatic
T153 Real Time Clock Hardware Failure Unit shut down Automatic
A154 Serial EEPROM Hardware Failure Unit shut down Automatic
T155 Serial EEPROM Storage Failure Error Alert only Automatic
A156 Critical Serial EEPROM Storage Fail Error Unit shut down Automatic A157 A/D Hardware Failure Unit shut down Automatic A171 Staged Gas Control Board Comm Failure Staged gas control disabled Automatic
T172 Control Expansion Module Comm Failure All CEM board functions disabled Automatic
A173 RCB board Communication Failure Unit shut down Automatic A174 ECB board Communication Failure Unit shut down Automatic
T177 4-20 mA Demand Limit Failure No demand limiting Automatic T178 4-20 mA Static Pressure Reset Fail No static pressure reset 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 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