In Case Of Compressor Malfunction - Technibel GRV79R5VAA Technical Data & Service Manual

9-5. In case of compressor malfunction

CAUTION
9-5-1.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 R407C.
• Do not reuse the recovered refrigerant, since will
contain impurities.
(2) Replacing compressor
• Soon after removing pinched pipes 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 R407C. 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 of evacuation
Length of tubing
Time
Should the compressor malfunction, be sure to replace compressor as quickly as
possible.
Use only the tools indicated exclusively for R407C.
for R407C".
Less than 10 m
More than 10 min. More than 15 min.
More than 10 m
53
See "10-3. Tools specifically
(1). Recovering refrigerant
OK
(2). Replacing compressor
OK
(3). Checking for sealing
OK
(4). Evacuation
OK
(5). Recharging