3-5
Trouble Diagnosis
1
2
3
4
5
6
7
8
3. W-2WAY ECO-i Alarm Codes
W-2WAY ECO-i Trouble Diagnosis
3-10
3-10
3-11
3-11
3-11
3-12
3-14
3-14
3-15
3-15
3-15
3-14
3-15
3-16
3-16
3-16
3-17
Alarm code Alarm meaning Page
E06 Outdoor unit failed to receive serial communication signals from indoor unit.
E12 Automatic address setting start is prohibited.
E15 Automatic address setting alarm (too few units)
E16 Automatic address setting alarm (too many units)
E20 No indoor units at automatic address setting.
3-6
3-6
3-6
3-7
3-7
3-7
3-8
3-8
3-8
3-9
3-9
3-9
E24 Outdoor unit (INV) failed to receive communications from another outdoor
unit (constant-speed).
E25 Outdoor unit address setting failure (duplication)
E26 Mismatch in outdoor unit quantity
E29 Outdoor unit failed to receive communication from relay control unit
F04 Compressor 1 discharge temperature sensor trouble
F05
F22
Compressor 2 discharge temperature sensor trouble
Compressor 3 discharge temperature sensor trouble
F06 Gas temperature sensor trouble at outdoor heat exchanger 1 (In)
F07 Liquid temperature sensor trouble at outdoor heat exchanger 1 (Out)
F08 Outdoor air temperature sensor trouble
F12 Compressor intake temperature sensor trouble
F16 High-pressure sensor trouble
F31 Outdoor unit non-volatile memory (EEPROM) trouble
3-11
3-10
3-10
F17 Low-pressure sensor trouble
F23 Gas temperature sensor trouble at outdoor heat exchanger 2 (In)
F24 Liquid temperature sensor trouble at outdoor heat exchanger 2 (Out)
H11 Constant speed compressor 2 overcurrent alarm
3-12
H03 Compressor CT sensor disconnected or short-circuit.
Compressor 3 overcurrent alarm
H12 Constant speed compressor 2 lock current alarm
Compressor 3 lock current alarm
Compressor 3 CT sensor disconnected or short-circuit
H05 Compressor 1 discharge temperature sensor disconnected
Compressor 3 discharge temperature sensor disconnected
3-13
H06 Low-pressure trouble in refrigerant circuit.
H13 Compressor 2 CT sensor disconnected or short-circuit
H15 Compressor 2 discharge temperature sensor disconnected
3-14
3-15
H22
H21
H23
H25
H31
HIC trouble alarm
L04
Outdoor unit address duplication
L05
Duplicated indoor unit priority (alarm at priority indoor units)
L06
Duplicated indoor unit priority (alarm at non-priority indoor units)
3-17
3-17
L10
Outdoor unit capacity not set
L17
Outdoor unit model mismatch
3-17
L18
4-way valve operation failure.
3-19
3-18
3-20
3-20
3-18
3-18
3-21
3-21
3-21
3-22
3-23
P03 Compressor 1 discharge temperature trouble
P04 High-pressure switch activated
P05 Reverse phase (or missing phase) detected, capacity mismatch
P16 Compressor 1 overcurrent
P17 Compressor 2 discharge temp trouble
P18 Compressor 3 discharge temp trouble
P22 Fan motor trouble
P26 Inverter compressor high-frequency overcurrent alarm
P29 Inverter compressor missing phase or lock alarm
CHECK blinking (1)
Blinking on the wired remote controller
CHECK blinking (2)
