Haier AW07LC2VHA Technical Overview page 43

Error Code F4
This code indicates the temperature of the compressor
hot gas is too high. This error would have occurred despite
the ECU attempt at reducing operating frequency. Causes
of this type of condition are typically a lack of refrigerant in
the system, excessive heat in the conditioned space or a
restriction in the refrigeration circuit.
Error Code F8
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.
Error Code F21
This code indicates an electrical failure of the sensor that is
used to sense the temperature of the outdoor coil during heat
mode operation. This sensor is connected to the ECU via a
connection at Plug CN-14.
Error Code F7
This code indicates an electrical failure of the sensor that is
used to sense the temperature of the suction gas that enters
the compressor. The sensor is connected to the ECU via two
wires at Plug CN-14.
Error Code F6
This code indicates an electrical failure of the sensor that is
used to sense the temperature of the outdoor air. The sensor
is connected to the ECU via two wires at Plug CN-14.
Error Code F25
This code indicates an electrical failure of the sensor that is
used to sense the temperature of the compressor hot gas
discharge line. The sensor is connected to the ECU via two
wires at Plug CN-14.
Error Code F13
The system is low on refrigerant charge. Correct leak and
recharge per installation instructions in Reference Section.
INDOOR WALL MOUNT UNIT
Indoor Unit Error Codes
Error Code F11
Recycle power and restart the system. If the compressor
initially starts but then stops, replace the MODULE board and
COMPRESSOR.
Error Code F28
Recycle power and restart the system. If the compressor
initially starts but then stops, replace the MODULE board and
COMPRESSOR.
Error Code F2
The current draw into the compressor is too high. Check
compressor windings. If OK, replace the Module Board.
Error Code F23
The current draw into the compressor is too high. Check
compressor windings. If OK, replace the Module Board.
Error Code E9
This error indicates the temperature of the indoor coil during
heating mode is too high and has exceeded the maximum
limit. This code will be indicated when the temperature of the
indoor coil exceeds 149 F twice in 30 minutes. Causes include
low charge, dirty indoor coil, faulty EEV
Indoor Clearances: If non-compliant may lead to
temperature control complaints.
Wire Sizing: If non-compliant may lead to communication
errors and inverter irregular operation.
Splices in Field Wiring: Splices between the wires that
connect between the outdoor and indoor unit should be
avoided. Communication errors may occur if non compliant.
Sealing Penetrations: If penetrations at back of unit are not
sealed, unconditioned air may be drawn into the back of the
indoor wall mount unit. Temperature control and capacity
complaints may occur.
ERROR CODES
Important Service Related
Installation Information
PAGE 43