|Error Code 0
||Unit is on standby and operating normally.
|Error Code C
||Unit is operating normally and in a cooling stage.
|Error Code Flashing C
||Cooling was commanded during an active anti-short cycle.
||Wait until unit timer has expired or press the TEST button to defeat short cycle delay.
|Error Code D1
||No shared data.
||Replace memory card with correct system information.
|Error Code D3
||Replace with properly sized air handler.
|Error Code D4
||Memory card in control board is invalid.
||Check if memory card is present and ensure it matches device.
|Error Code D8
||Old shared data system data is obsolete.
||If system will not operate, order new memory card to update system information.
|Error Code T
||Unit is in test mode.
|Error Code P
||There's no current going to the compressor.
||Check to see if the motor protector is open or line voltage is disconnected.
|Error Code 1
||The compressor is running continuously.
||Check to see if there is low refrigerant, air duct leakage, a dirty outdoor coil, or a dirty air filter.
|Error Codes 02, 29, and flashing L29
||Check if there is a dirty outdoor coil, outdoor fan is not running, liquid line restriction, or excessive refrigerant charge.
|Error Code 03
||Unit is short-cycling.
||Check thermostat wire connections (R. C. 1. & 2) and thermostat location in zone (too close to discharge grill).
|Error Codes 05, 06, 07, L6, and L7
||Problem with the compressor because of an open circuit.
||Check for damaged, miswired. or wrong run capacitor, broken wires, loose connectors, or miswired compressor, compressor windings for continuity, and open compressor internal protector.
|Error Codes L4
||The rotor is locked.
||Check if there is a bad run capacitor, low line voltage, excessive refrigerant in compressor, or seized bearings in compressor.
|Error Code 09
||Secondary voltage is low.
||Check if the control transformer is overloaded or for low line voltage.
|Error Codes 21 and flashing L21
||Low-pressure control is open.
||Check if unit has low refrigerant charge, indoor coil is frozen, dirty indoor coil or filter, indoor blower is not running, or expansion valve is not operating correctly.
|Error Code 27
||Low or no line voltage.
||Check incoming line voltage to the disconnect and unit and wiring connections.
|Error Code 28
||High line voltage fault.
||Check line voltage.
|Error Code 30
||On-board fuse is open.
||Check if low voltage wiring at R and C is damaged or miswired.
|Error Code 80
||Unit isn't meeting minimum airflow requirements.
||Replace with properly sized unit.
|Error Code 83
||Problem with the condenser coil temperature.
||Check sensor is installed correctly on control and replace the sensor.
|Error Code 84
||Problem with the outdoor ambient temperature fault.
||Check unit placement. If the outdoor unit is in a high temperature area, wait until the ambient temperature drops and check sensor reading. Check sensor is installed correctly on control. Replace the sensor.
|Error Code 93
||There's a problem with the internal control.
||Check control for proper system operation. Replace control.