Carrier WEATHERMAKER 48A2020 - Page 103

103
LEGEND
A181 Circuit A ODF VFD Communication Failure Stop Circuit Manual Wiring error, board failure, VFD fault
A182 Circuit B ODF VFD Communication Failure Stop Circuit Manual Wiring error, board failure, VFD fault
T183 Comp Lock Low Ambient Compressor stop Automatic Ambient condition
A200 Linkage Timeout Error - Communication Failure Stop unit Manual Wiring errors, board failures
T210 Building Pressure Transducer Failure Close economizer, stop exhaust Automatic Sensor failure, wiring error
T211 Static Pressure Transducer Failure Stop unit Automatic Sensor failure, wiring error
T220 Indoor Air Quality Sensor Failure Stop IAQ control Automatic Sensor failure, wiring error
T221 Outdoor Air Quality Sensor Failure Use a default value for IAQ Automatic Sensor failure, wiring error
T229 Economizer Minimum Position Override Input Failure Use software configured minimum Automatic Input failure, wiring error
T300 Space Temperature Below Limit Stop cooling, but continue to heat Automatic Outdoor dampers stuck, no load
T301 Space Temperature Above Limit Stop heating, but continue to cool Automatic High load, dampers open
T302 Supply Temperature Below Limit Continue to run unit Automatic
Dampers open, check configuration set-
point
T303 Supply Temperature Above Limit Continue to run unit Automatic
Dampers open, check configuration set-
point
T304 Return Temperature Below Limit Continue to run unit Automatic
Dampers open, check configuration set-
point
T305 Return Temperature Above Limit Continue to run unit Automatic
Dampers open, check configuration set-
point
T308 Return Air Relative Humidity Below Limit Alert Automatic Configuration error, or sensor error
T309 Return Air Relative Humidity Above Limit Continue to run unit Automatic
Dampers open, check configuration set-
point
T310 Supply Duct Static Pressure Below Limit Continue to run unit Automatic VFD problem, broken fan belt
T311 Supply Duct Static Pressure Above Limit Continue to run unit Automatic VFD problem, broken fan belt
T312 Building Static Pressure Below Limit Continue to run unit Automatic Exhaust issues, check setpoint
T313 Building Static Pressure Above Limit Continue to run unit Automatic Exhaust issues, check setpoint
T314 IAQ Above Limit Continue to run unit Automatic Damper or IAQ control issues
A404 Fire Shut Down Emergency Mode (fire-smoke) Unit Shutdown Automatic Smoke detector switch or external switch
A405 Evacuation Emergency Mode Run power exhaust Automatic Special fire mode control
A406 Pressurization Emergency Mode Run supply fan Automatic Special fire mode control
A407 Smoke Purge Emergency Mode Run supply and exhaust fans Automatic Special fire mode control
T408 Dirty Air Filter Continue to run unit Automatic Dirty filter, switch setting
A409
Supply Fan Status Failure (Commanded on, Sensed off) or
(Commended off, Sensed on)
Stop unit Automatic Fan drive failure
T409
Supply Fan Status Failure (Commanded on, Sensed off) or
(Commended off, Sensed on)
Continue to run unit Automatic Fan drive failure, or sensor failure
T414 Loss of Communication with the Belimo Actuator Close economizer Automatic
Calibrate economizer, economizer fail-
ure, wiring
T414 Belimo Actuator Direction Error Close economizer Automatic Motor direction switch wrong, wiring
T414 Belimo Actuator Failure Attempt to close economizer Automatic Motor failure
T414 Belimo Actuator Jammed Close economizer Automatic Obstruction in damper
T414 Belimo Actuator Range Error Close economizer Automatic Calibrate economizer
T414 Excess Outdoor Air Alert Automatic Obstruction of actuator.
T414 Economizing When it Should Not Alert Automatic Obstruction of actuator.
T414 Economizing When it Should Alert Automatic Obstruction of actuator.
T414
Damper Not Modulating Alert Automatic Actuator disconnected.
T420 R-W1 Jumper Must Be Installed to Run Heat in Service Test No heat Automatic Add red wire jumpers
T421 Thermostat Y2 Input ON without Y1 ON Assume Y2 is Y1 Automatic Thermostat wiring error
T422 Thermostat W2 Input ON without W1 ON Assume W2 is W1 Automatic Thermostat wiring error
T423 Thermostat Y and W Inputs ON Alert Automatic Thermostat issues
T424 Thermostat G Input OFF on a Call for Cooling Turn fan on Automatic Thermostat or wiring issues
T500 Current Sensor Board Failure - A1 Stop compressor A1 Automatic Faulty board or wiring
T501 Current Sensor Board Failure - A2 Stop compressor A2 Automatic Faulty board or wiring
T502 Current Sensor Board Failure - B1 Stop compressor B1 Automatic Faulty board or wiring
T503 Current Sensor Board Failure - B2 Stop compressor B2 Automatic Faulty board or wiring
A700 Supply Air Temperature Sensor Failure Stop staged gas heat Automatic Faulty sensor or wiring error
T701 Staged Gas Thermistor 1 Failure Stop staged gas heat Automatic Faulty sensor or wiring error
T702 Staged Gas Thermistor 2 Failure Stop staged gas heat Automatic Faulty sensor or wiring error
T703 Staged Gas Thermistor 3 Failure Stop staged gas heat Automatic Faulty sensor or wiring error
A704 Staged Gas Leaving Air Temp Sum Total Failure Stop staged gas heat Automatic Faulty sensor or wiring error
T705 Limit Switch Thermistor Failure Stop staged gas heat Automatic Faulty switch or wiring
A706 Hydronic Evap Discharge Thermistor Failure Unit shut down Automatic Faulty sensor or wiring error
A707 Digital Scroll Discharge Temperature Failure Digital compressor limited to 50% Automatic Sensor Failure, wiring error
T800 Cannot Enable MLV and Digital Scroll Simultaneously Alert Automatic Incorrect unit configuration
T802 Invalid for Design Series 4 Alert Automatic Incorrect unit configuration
Axxx — Alarm Pxxx — Pre-Alert
CEM — Controls Expansion Module Txxx — Alert
IAQ — Indoor Air Quality TXV — Thermostatic Expansion Valve
OAT — Outdoor Air Temperature VFD — Variable Frequency Drive
Table 99 — Alert and Alarm Codes (cont)
ALARM OR
ALERT
NUMBER
DESCRIPTION ACTION TAKEN BY CONTROL
RESET
METHOD
PROBABLE CAUSE