Haier BD-478A Service Manual page 20

normal running sounds. If there is heavy buzz that means the
motor has not been started normally. If there is bump sound, this
means that the suspended spring in the compressor is broken
and the compressor is running in tilt. When these matters occur,
please change compressor.
12.1.5 troubleshooting by touch
(1) Touch the cover of condenser, after continuous operation,
the upper part of the cover is the warmest; the temperature of
lower part is similar to room temperature. Its temperature is
relative to environment temperature. The temperature in winter is
low and the condenser's temperature is low too, and there is only
a small part warm. In summer, the temperature is high and the
temperature of condenser cover is high too, and the whole
condenser is warm.
(2) The temperature of high-pressure exhaust pipe is high, when
touching with your hand, in summer it is hot; in winter it is also
hot. The temperature of low-pressure gas inlet pipe is low. In
summer there is dew at the pipe wall and it will feel cool when
touching; when touching in winter, it will feel cooler.
MAINTENANCE SERVICE AND TROUBLE SHOOTING
Maintenance Service and Trouble Shooting
(3) The cover temperature of The evaporator can be as low as
-30℃it will feel sticky when touching. If you'd like to touch,
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