Haier 5U90S2SS2FA Installation Manual page 32

Test running
Status
means 4 indoor units. 5U90S2SS2FA and 5U105S2SS2FA with 5 green LED means 5 indoor units. If one LED keep lighting that
means the corresponding indoor unit has good communication with outdoor unit. If one LED is not lighting, that means there is no
communication between indoor and outdoor.unit has good commmunication with outdoor unit. If one LED is not lighting, that means
there is no communication between indoor and outdoor.