Haier BD-478A Service Manual page 31

(1) Operation method of repairing equipment (please see instruction
manual).
(2) Special requirements
① The time interval from opening of compressor to the beginning of
evacuation can not exceed 10 minutes.
② The evacuation time shall not be less than 45 min.
③ In case there is leakage of freezer, if leakage occurs at high-pressure end,
it is repairable. Please blow high purity N
occurs at low-pressure end, Check system pressure, if the system has
no pressure, the freezer has to be scrapped and change with new one, if
there is pressure, it is repairable.
12.3.4 Changing procedure of R134a compressor
(1) Switch power off：Open the protection cover by using cross screwdriver
or universal
(2) Screwdriver.
(3) Remove electrical parts of compressor.
MAINTENANCE SERVICE AND TROUBLE SHOOTING
Maintenance Service and Trouble Shooting
(4) Remove the four mounting bolts of compressor by using fork wrench or
universal tool.
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before welding. If leakage
2