Mitsubishi SRK10CES, Техническое руководство

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(2) Servicing
(a) Evacuation
The evacuation is an procedure to purge impurities ...... noncondensable gas, air, moisture from the refrigerant equipment by using
a vacuum pump. Since the refrigerant R22 is very insoluble in water, even a small amount of moisture left in the refrigerant
equipment will freeze, causing what is called water clogging.
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Evacuation procedure
(i) Check to ensure that there is no internal pressure in the unit. If there is an internal pressure, it
should be relieved through the check joint.
(ii) Connect the service hoses of the gauge manifold to the check joint of the gas & liquid piping.
(iii) Connect a vacuum pump to the charge hose
A
. Repeat evacuation in the following sequence.
(f) How to make sure of remote control
(1)
Is remote
control
normal?
YES
Again pushing
operating switch
Operating the
unit?
NO
Does operating Unit
ON/OFF button
YES
Replace the
display
Remote control
defects
Abnormal is not
fount
It is normal
Remote control
defects
NO
NO
YES
NO
Note (1) How to check the remote control.
(a) Press the reset switch of remote control.
(b) If the almost normal if entire display of remote control
is shown after
1
indication.
Liquid side
Gas side
Check joint
Service hose
Charge hose
Vacuum
pump
Refrigerant
cylinder
Gauge
manifold
Stop the vacuum pump.
Notes (1) Do not use the refrigerant pressure to expel air.
(2) Do not use the compressor for evacuation.
(3) Do not operate the compressor in the vacuum condition.
Start the vacuum pump
Operate the vacuum pump for more than 15 minutes after –0.1MPa
(–76 cmHg) is indicated.
Close low pressure valve 1 of gauge manifold.
Operating the unit?
Control unit defects
YES
Operating the
unit by remote
control?
LO
MED
HI
AUTO
HI POWER ECONO
ON OFF
AM PM