haier AD422BMBAA - Manual (Page 15)

Maintenance
13
Before using season
1. Check the following items:
If the air inlet and outlet of indoor and outdoor unit are blocked.
If the earth wire is proper.
If the wire connection is proper.
If there is abnormal phenomenon, please ask the after-sale service staffs
for help.
2. Cleaning the air filter or air inlet and casing
After cleaning the air filter, it must be reinstalled.
3. Turn on the power
After using season
1. In a sunny day, perform half-a-day Fan operation to make the inner
of the unit dry.
2. Cut off the power
If do not cut off power, the unit will consume power. Power cutoff can
save power.
3. Cleaning the air filter or air inlet and casing
After cleaning the air filter, it must be reinstalled.
For the details of cleaning, please refer to Maintenance.
Maintenance before and after the using season.
After turning on the power, words appear on the LCD screen of the wire
controller.