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W-2WAY ECO-i SYSTEM
Trouble Diagnosis
4. W-2WAY ECO-i Alarm Codes
With types 705, 905 and 1155, the INV compressor is compressor 1, and the constant-speed
compressor is compressor 2.
With types 1305 and 1405, the INV compressor is compressor 1, and the constant-speed
compressors (AC1, AC2) are compressors 2 and 3.
Alarm code Alarm meaning Page
E06 Outdoor unit failed to receive serial communication signals from indoor unit. 5-9
E12 Automatic address setting start is prohibited. 5-9
E15 Automatic address setting alarm (too few units) 5-9
E16 Automatic address setting alarm (too many units) 5-10
E20 No indoor units at automatic address setting. 5-10
E24 Outdoor unit (INV) failed to receive communications from another outdoor
unit (constant-speed).
5-10
E25 Outdoor unit address setting failure (duplication) 5-11
E26 Mismatch in outdoor unit quantity 5-11
E29 Outdoor unit failed to receive communication from outdoor unit (main) 5-11
F04 Compressor 1 discharge temperature sensor trouble 5-12
F05 Compressor 2 discharge temperature sensor trouble 5-12
F22 Compressor 3 discharge temperature sensor trouble 5-12
F06 Gas temperature sensor trouble at outdoor heat exchanger 1 (In) 5-13
F07 Liquid temperature sensor trouble at outdoor heat exchanger 1 (Out) 5-13
F08 Outdoor air temperature sensor trouble 5-14
F12 Compressor intake temperature sensor trouble 5-14
F16 High-pressure sensor trouble 5-15
F17 Low-pressure sensor trouble 5-16
F23 Gas temperature sensor trouble at outdoor heat exchanger 2 (In) 5-13
F24 Liquid temperature sensor trouble at outdoor heat exchanger 2 (Out) 5-13
F25 Gas temperature sensor trouble at outdoor heat exchanger 3 5-13
F26 Liquid temperature sensor trouble at outdoor heat exchanger 3 5-13
F31 Outdoor unit non-volatile memory (EEPROM) trouble 5-16
H11 Constant speed compressor 2 overcurrent alarm 5-17
H12 Constant speed compressor 2 lock current alarm 5-17
H03 Compressor 1 CT sensor disconnected or short-circuit 5-18
H06 Low-pressure switch activated 5-19
H07 No-oil alarm 5-20
H08 Compressor 1 oil detection sensor (connection) trouble 5-20
H13 Compressor 2 CT sensor disconnected or short-circuit 5-18
H15 Compressor 2 discharge temperature sensor disconnected 5-18
H21 Compressor 3 overcurrent alarm 5-17
H22 Compressor 3 lock current alarm 5-17
H23 Compressor 3 CT sensor disconnected or short-circuit 5-18
H25 Compressor 3 discharge temperature sensor disconnected 5-18
H27 Compressor 2 oil detection sensor (connection) trouble 5-20
H28 Compressor 3 oil detection sensor (connection) trouble 5-20
H31 HIC trouble alarm 5-21
L04 Outdoor system address duplication 5-21
L10 Outdoor unit capacity not set 5-22
L17 Outdoor unit model mismatch 5-22
L18 4-way valve operation failure 5-22
W-2WAYECO-iSYSTEMEng5.indd7W-2WAYECO-iSYSTEMEng5.indd7 2008/09/0916:00:132008/09/0916:00:13
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