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10-5. In Case of Compressor Malfunction
CAUTION
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 it will
contain 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
prevent 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:
Standard time for evacuation
Length of tubing
Time
Should the compressor malfunction, be sure to make the switch to a replacement
compressor as quickly as possible.
Use only the tools indicated exclusively for R410A.
Specifically for R410A."
Less than 10 meters
More than 10 minutes
(1) Recover refrigerant
(2) Replace compressor
(3) Check for sealing
(4) Evacuation
(5) Recharge
More than 10 meters
More than 15 minutes
33
See "10-3. Tools
OK
OK
OK
OK
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