GE FHV5SGWW Service Manual page 57

Freezer Model:FHV5SGWW/FHV7SGWW
MAINTENANCE SERVICE AND TROUBLE SHOOTING
Maintenance Service and Trouble Shooting
(6) Humidity measuring instrument: the measurement of relative humidity
is wet and dry bulb method. Put the dry bulb thermometer and wet bulb
thermometer (enclose 1.5-2 layers of degreased gauze at the temperature
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 t to reach
m
t (max) in accordance with table 13-3, cooling temperature t to reach +14
m m
℃, 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.
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