Haier AW07LC2VHA Technical Overview page 33

Error Code 26
CPU module reset indicates possible drive module power
anomalies. Usually when the low line voltage conditions are
present. Check for line voltage problems.
Error Code 27
Compressor current abnormal: module driver board
detected the
that compressor current is too large, The Module board
software protects it and compressor.
Error Codes Related to Compressor, Outdoor Fan, 4-Way Valve
Error Codes Related To Compressor, Outdoor Fan Motor,
4-Way Valve
Error Code 9
This code indicates the outdoor fan motor is not running.
The fault is detected very quickly by the ECU. The system
will shut off and display this error code. If this error occurs,
reference the Test Procedure for Outdoor Fan Motor.
Malfunction Code 17
This error code indicates that the 4 way valve is not directing
hot gas to the proper coil. In other words, the system is
running the refrigerant in the wrong mode of operation.
Refer to the Test Procedure for 4 way valve to diagnose the
problem.
Error Code 24
This error code indicates the compressor failed to start when
a call for operation occurred. Refer to the Test Procedure for
Compressor troubleshooting to diagnose the problem.
OUTDOOR UNIT ERROR CODES
Error Codes Related to MODULE Board Operation
Possible Causes:
• overcharge
• dirty outdoor coil
• hot conditioned space temperature/high load
• refrigeration circuit restriction
• seized compressor
• Bad Module Board
4-Way Valve
Compressor
ERROR CODES
PAGE 33