1. If all indicator lights are off, the air conditioner is not powered on. Check whether the socket is electrified and the power cord is damaged.
2. If the air conditioner can be turned on after being connected to the power supply, the power light is on and the running light is not on, then it may be that the air conditioner lacks refrigerant, resulting in the air conditioner not operating normally. Need to contact after-sales maintenance personnel to fluoride the air conditioner.
3. Check the air conditioning electric control board and compressor relay, as well as the fuse at the front end of compressor relay. It may be that the electric control board is damaged or the fuse is broken and needs to be repaired or replaced.
4. Check whether the indoor and outdoor connecting wires are correct according to the wiring diagram. Incorrect wiring will lead to abnormal communication between internal and external machines and air conditioners.
Haier air conditioner generally has three indicator lights, one is the power light, which indicates whether the air conditioner is electrified, the other is the timing light, which can set the timing, and the other is the operation indicator light, which indicates whether the air conditioner is operating normally. If the running light doesn't light up or flash, it means that the air conditioner is out of order and can't run normally. It is best to contact after-sales service for maintenance.