10-5. In case of compressor malfunction
●
Should the compressor malfunction, be sure to replace compressor
as quickly as possible.
●
Use only the tools indicated exclusively for R410A.
➞
See "10-3. Tools
specifically for R410A".
10-5-1.Procedure for replacing compressor
(1) Recovering refrigerant
• Any remaining refrigerant inside the unit should not be
released to the atmosphere, but recovered using the
refrigerant recovery unit for R410A.
• Do not reuse the recovered refrigerant, since will con-
tain impurities.
(2) Replacing compressor
• Soon after removing seals of both discharge and
suction tubes of the new compressor, replace it
quickly.
(3) Checking for sealing
• Use nitrogen gas for the pressurized gas, and never
use a refrigerant other than R410A. Also do not use
oxygen or any flammable gas.
(4) Evacuation
•
Use a solenoid valve-installed vacuum pump
so
that even if power is cut off in the middle of evacuation
of air due to a power interruption, the valve will pre-
vent the pump oil from flowing back.
• The equipment may be damaged if moisture remains
in the tubing, thus carry out the evacuation thoroughly.
• When using a vacuum pump with exhaust air volume
more than 25L/min. and ultimate vacuum pressure
rate of 0.05Torr:
56
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