Service diagnosis
%&
Code indication
Description
Reference
Page
Indoor
displaying
panel
Outdoor
(LED1 flash
times)
Indoor ˂ Outdoor
E7 15
Communication fault between indoor and
outdoor unit
Page .
Indoor Malfunction
E1 / Room temperature sensor failure Page .
E2 / Heat-exchange sensor failure Page .
E4 / Indoor EEPROM error Page .
E14 / Indoor fan motor malfunction Page .
Outdoor
Malfunction
F12 1 Outdoor EEPROM error Page .
F1 2 The protection of IPM Page .
F22 3
Over-current protection of AC electricity for
the outdoor module
Page .
F3 4
Communication fault between the IPM and
outdoor PCB
Page .
F19 6 Power voltage is too high or low Page .
F27 7
Compressor is lock-rotor or stopped
momentary
Page .
F4 8 Overheat protection for discharge temperature Page .
F8 9 Outdoor DC fan motor fault Page .
F21 10 Defrost temperature sensor failure Page .
F7 11 Suction temperature sensor failure Page .
F6 12 Ambient temperature sensor failure Page .
F25 13 Discharge temperature sensor failure Page .
F13 16 Short of refrigerant Page .
F11 18 Deviate from the normal for the compressor Page .
F28 19 Loop of the station detect error Page .
/ 21 Over load protection of indoor system Page .
F2 24 Over-current of the compressor Page .
F23 25
Over-current protection for single-phase of the
compressor
Page .
F43 46 Mismatch between indoor and outdoor units Page .
Domestic air conditioner