Haier BD-478A Maintenance Service And Trouble Shooting, Maintenance Service and Trouble Shooting

sensing parts of thermometers, and put the bottom end of gauze into distilled water) under the blowing of wind with the speed of 2.5-3m/s. Record the temperature of dry bulb thermometer, and calculate the relative humidity using the <<Relative humidity referring table for environment test>> GB6999-86.

(7) Cooling speed

Leave the freezer at test room, room temperature is 32 ℃, the inner temperature of freezer gets balance with room temperature (temperature difference +-1K). Close freezer door and let the freezer running continuously. Record the time needed for storage temperature tm to reach

tm(max) in accordance with table 13-3, cooling temperature tm to reach +14 ℃, and the time the freezing temperature reaches the corresponding star level. According to standard, 250L below freezer will not exceed 2h; 250L-500L freezers will not exceed 3h.

(8) Freezing ability

The freezing ability of freezer shall not be less than 90% of rated ability.

MAINTENANCE SERVICE AND TROUBLE SHOOTING

Maintenance Service and Trouble Shooting

(9) Electricity consumption

Leave the freezer at test room, climate temperatures are: SN, N, and ST

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