Carrier WeatherExpert 48N2 Controls, Start-Up, Operation, Service, And Troubleshooting page 124

ALARM OR
ALERT
NUMBER
T622
Economizer 2 Actuator Control Range Increased
T623 Economizer 2 Actuator Overload, Setpoint Not Reached
T624
Economizer 2 Actuator Excessive Utilization
T625 Econ 2 (Return) Not Economizing When it Should
T626 Econ 2 (Return) Economizing When it Should Not
T627 Econ 2 (Return) Damper Stuck or Jammed
T630 Humd/HTC-2 Actuator Out of Calibration
T631 Humd/HTC-2 Actuator Communication Failure
T632 Humd/HTC-2 Actuator Control Range Increased
T633 Humd/HTC-2 Actuator Overload, Setpoint Not Reached
T634 Humd/HTC-2 Actuator Excessive Utilization
A640 Heating Coil Actuator Out of Calibration
A641 Heating Coil Actuator Comm Fail
T642 Heating Coil Actuator Control Range Increased
A643 Heating Coil Actuator Overload, Setpoint Not Reached
A644 Heating Coil Actuator Excessive Utilization
T650 Economizer 3 Actuator Out of Calibration
T651 Economizer 3 Actuator Comm Failure
T652 Economizer 3 Actuator Control Range Increased
T653 Economizer 3 Actuator Overload, Setpoint Not Reached
T654 Economizer 3 Actuator Excessive Utilization
T655
Econ 3 (Outside 2) Not Economizing When it Should
T656 Econ 3 (Outside 2) Economizing When it Should Not
T657
Econ 3 (Outside 2) Damper Stuck or Jammed
A660 Heating Actuator 3 Out of Calibration
A661
Heating Actuator 3 Comm Failure
T662 Heating Actuator 3 Control Range Increased
A663
Heating Actuator 3 Overload, Setpoint Not Reached
A664 Heating Actuator 3 Excessive Utilization
A670
Heating Actuator 4 Out of Calibration
A671 Heating Actuator 4 Comm Failure
T672 Heating Actuator 4 Control Range Increased
A673 Heating Actuator 4 Overload, Setpoint Not Reached
A674 Heating Actuator 4 Excessive Utilization
A700 Air Temp Lvg Supply Fan Thermistor Failure
T701 Staged Gas 1 Thermistor Failure
T702 Staged Gas 2 Thermistor Failure
T703 Staged Gas 3 Thermistor Failure
A704 Staged Gas Lvg Air Temp Sum Total Failure
T705 Limit Switch Thermistor Failure
A706 Hydronic Evap Discharge Thermistor Failure
A707 Digital Scroll A1 Discharge Thermistor Failure
T800 Cannot Enable MLV and Digital Scroll Simultaneously
T801 Invalid Sensor Enable. Check Building Pressure Mode
Table 92 — Alert and Alarm Codes (cont)
DESCRIPTION ACTION TAKEN BY CONTROL
Alert only
Alarm only
Alert only
Alert only
Alert only
Alert only
Alert only
No humidifer functions
Alert only
Alert only
Alert only
Alarm only
No heating coil functions
Alert only
Alarm only
Alarm only
Alarm only
No economizer functions
Alert only
Alarm 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 shut down
Average remaining sensors
Average remaining sensors
Average remaining sensors
No staged heat function
No software limit switch function
Unit shut down
Digital compressor A1 llimited to 50%
Alert only
Alert only
124
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
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic