Error Codes

A list of error codes and solutions

E01 - Discharge temperature sensor protection
Disconnect Cn22 from the control board, and check for continuity on the sensor line.   If you do not have any continuity on that sensor, the sensor may ne...
Mon, 6 Feb, 2023 at 1:20 PM
E05 - Outdoor coil temperature sensor protection
Disconnect Cn21 from the control board, and check for continuity on the sensor line.   If you do not have any continuity on that sensor, the sensor may n...
Mon, 6 Feb, 2023 at 1:21 PM
E09 - Suction temperature sensor protection
Disconnect Cn21 from the control board, and check for continuity on the sensor line.   If you do not have any continuity on that sensor, the sensor may ...
Mon, 6 Feb, 2023 at 1:25 PM
E13 - Cooling coil temperature sensor protection
Disconnect Cn24 from the control board, and check for continuity on the sensor line.   If you do not have any continuity on that sensor, the sensor may...
Mon, 6 Feb, 2023 at 2:28 PM
E18 - Outlet water temperature sensor protection
Disconnect Cn26 from the control board, and check for continuity on the sensor line.   If you do not have any continuity on that sensor, the sensor ma...
Mon, 6 Feb, 2023 at 2:29 PM
E19 - Return water temperature sensor protection
Disconnect Cn25 from the control board, and check for continuity on the sensor line.   If you do not have any continuity on that sensor, the sensor m...
Mon, 6 Feb, 2023 at 2:30 PM
E20 - Water tank temperature sensor protection
Disconnect Cn27 from the control board, and check for continuity on the sensor line.   If you do not have any continuity on that sensor, the sensor ...
Mon, 6 Feb, 2023 at 2:33 PM
E21 - Controller communication error
Check the connection between the controller and the cable (re-seat if necessary) and trace the line to make sure it is connected to Cn16 at the cont...
Mon, 6 Feb, 2023 at 2:38 PM
E22 - Outdoor ambient temperature sensor protection
Disconnect Cn20 from the control board, and check for continuity on the sensor line.   If you do not have any continuity on that sensor, the sensor...
Mon, 6 Feb, 2023 at 2:39 PM
E27 - Communication Fault
Communication fault between the main control board and the drive board.  This may also be accompanied by an R10 Error. Try to unplug both the fan motors...
Fri, 1 Sep, 2023 at 10:28 AM