Hisense Group KF-5002GWE - Manual (Page 21)

Trouble Shooting
Make sure any of the following circumstances occurs:
Failure of Operation Failure of Desired Cooling Capacity
Power failure
Operation of the appliance will be recovered after
failure of power supply.
Power is disconnected
Short circuit or blown fuse
Batteries in the remote control unit are
exhausted or incorrectly inserted.
The button "RESET" is not pressed.
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Sleep mode for energy-saving
Excessive people in the room
Door or window are not closed.
Low fan speed is set.
Temperature is set too high for cooling.
Signal from the remote control unit is out of reach
of the indoor unit receiver.
Air filter is blocked by dirt.
Excessive storage around the outdoor unit.